drivers/platform/x86/thinkpad_acpi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  */
   8
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10
  11 #define TPACPI_VERSION "0.26"
  12 #define TPACPI_SYSFS_VERSION 0x030000
  13
  14 /*
  15  *  Changelog:
  16  *  2007-10-20          changelog trimmed down
  17  *
  18  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  19  *                      drivers/misc.
  20  *
  21  *  2006-11-22  0.13    new maintainer
  22  *                      changelog now lives in git commit history, and will
  23  *                      not be updated further in-file.
  24  *
  25  *  2005-03-17  0.11    support for 600e, 770x
  26  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  27  *
  28  *  2005-01-16  0.9     use MODULE_VERSION
  29  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  30  *                      fix parameter passing on module loading
  31  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  32  *                          thanks to Jim Radford <radford@blackbean.org>
  33  *  2004-11-08  0.8     fix init error case, don't return from a macro
  34  *                          thanks to Chris Wright <chrisw@osdl.org>
  35  */
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/types.h>
  41 #include <linux/string.h>
  42 #include <linux/list.h>
  43 #include <linux/mutex.h>
  44 #include <linux/sched.h>
  45 #include <linux/sched/signal.h>
  46 #include <linux/kthread.h>
  47 #include <linux/freezer.h>
  48 #include <linux/delay.h>
  49 #include <linux/slab.h>
  50 #include <linux/nvram.h>
  51 #include <linux/proc_fs.h>
  52 #include <linux/seq_file.h>
  53 #include <linux/sysfs.h>
  54 #include <linux/backlight.h>
  55 #include <linux/bitops.h>
  56 #include <linux/fb.h>
  57 #include <linux/platform_device.h>
  58 #include <linux/hwmon.h>
  59 #include <linux/hwmon-sysfs.h>
  60 #include <linux/input.h>
  61 #include <linux/leds.h>
  62 #include <linux/rfkill.h>
  63 #include <linux/dmi.h>
  64 #include <linux/jiffies.h>
  65 #include <linux/workqueue.h>
  66 #include <linux/acpi.h>
  67 #include <linux/pci.h>
  68 #include <linux/power_supply.h>
  69 #include <sound/core.h>
  70 #include <sound/control.h>
  71 #include <sound/initval.h>
  72 #include <linux/uaccess.h>
  73 #include <acpi/battery.h>
  74 #include <acpi/video.h>
  75
  76 /* ThinkPad CMOS commands */
  77 #define TP_CMOS_VOLUME_DOWN     0
  78 #define TP_CMOS_VOLUME_UP       1
  79 #define TP_CMOS_VOLUME_MUTE     2
  80 #define TP_CMOS_BRIGHTNESS_UP   4
  81 #define TP_CMOS_BRIGHTNESS_DOWN 5
  82 #define TP_CMOS_THINKLIGHT_ON   12
  83 #define TP_CMOS_THINKLIGHT_OFF  13
  84
  85 /* NVRAM Addresses */
  86 enum tp_nvram_addr {
  87         TP_NVRAM_ADDR_HK2               = 0x57,
  88         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  89         TP_NVRAM_ADDR_VIDEO             = 0x59,
  90         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  91         TP_NVRAM_ADDR_MIXER             = 0x60,
  92 };
  93
  94 /* NVRAM bit masks */
  95 enum {
  96         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
  97         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
  98         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
  99         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 100         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 101         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 102         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 103         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 104         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 105         TP_NVRAM_MASK_MUTE              = 0x40,
 106         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 107         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 108         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 109 };
 110
 111 /* Misc NVRAM-related */
 112 enum {
 113         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
 114 };
 115
 116 /* ACPI HIDs */
 117 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
 118 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
 119 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID  "LEN0268"
 120 #define TPACPI_ACPI_EC_HID              "PNP0C09"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /* HKEY events */
 149 enum tpacpi_hkey_event_t {
 150         /* Hotkey-related */
 151         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 152         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 153         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 154         TP_HKEY_EV_KBD_LIGHT            = 0x1012, /* Thinklight/kbd backlight */
 155         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 156         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 157         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 158
 159         /* Reasons for waking up from S3/S4 */
 160         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 161         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 162         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 163         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 164         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 165         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 166
 167         /* Auto-sleep after eject request */
 168         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 169         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 170
 171         /* Misc bay events */
 172         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 173         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
 174                                                      or port replicator */
 175         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
 176                                                      dock or port replicator */
 177
 178         /* User-interface events */
 179         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 180         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 181         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 182         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 183         TP_HKEY_EV_TABLET_CHANGED       = 0x60c0, /* X1 Yoga (2016):
 184                                                    * enter/leave tablet mode
 185                                                    */
 186         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 187         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 188         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 189
 190         /* Key-related user-interface events */
 191         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
 192         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
 193         TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
 194
 195         /* Thermal events */
 196         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 197         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 198         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 199         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 200         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* windows; thermal table changed */
 201         TP_HKEY_EV_THM_CSM_COMPLETED    = 0x6032, /* windows; thermal control set
 202                                                    * command completed. Related to
 203                                                    * AML DYTC */
 204         TP_HKEY_EV_THM_TRANSFM_CHANGED  = 0x60F0, /* windows; thermal transformation
 205                                                    * changed. Related to AML GMTS */
 206
 207         /* AC-related events */
 208         TP_HKEY_EV_AC_CHANGED           = 0x6040, /* AC status changed */
 209
 210         /* Further user-interface events */
 211         TP_HKEY_EV_PALM_DETECTED        = 0x60b0, /* palm hoveres keyboard */
 212         TP_HKEY_EV_PALM_UNDETECTED      = 0x60b1, /* palm removed */
 213
 214         /* Misc */
 215         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 216 };
 217
 218 /****************************************************************************
 219  * Main driver
 220  */
 221
 222 #define TPACPI_NAME "thinkpad"
 223 #define TPACPI_DESC "ThinkPad ACPI Extras"
 224 #define TPACPI_FILE TPACPI_NAME "_acpi"
 225 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 226 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 227
 228 #define TPACPI_PROC_DIR "ibm"
 229 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 230 #define TPACPI_DRVR_NAME TPACPI_FILE
 231 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 232 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 233
 234 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 235 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 236
 237 #define TPACPI_MAX_ACPI_ARGS 3
 238
 239 /* Debugging printk groups */
 240 #define TPACPI_DBG_ALL          0xffff
 241 #define TPACPI_DBG_DISCLOSETASK 0x8000
 242 #define TPACPI_DBG_INIT         0x0001
 243 #define TPACPI_DBG_EXIT         0x0002
 244 #define TPACPI_DBG_RFKILL       0x0004
 245 #define TPACPI_DBG_HKEY         0x0008
 246 #define TPACPI_DBG_FAN          0x0010
 247 #define TPACPI_DBG_BRGHT        0x0020
 248 #define TPACPI_DBG_MIXER        0x0040
 249
 250 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 251 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 252 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 253
 254
 255 /****************************************************************************
 256  * Driver-wide structs and misc. variables
 257  */
 258
 259 struct ibm_struct;
 260
 261 struct tp_acpi_drv_struct {
 262         const struct acpi_device_id *hid;
 263         struct acpi_driver *driver;
 264
 265         void (*notify) (struct ibm_struct *, u32);
 266         acpi_handle *handle;
 267         u32 type;
 268         struct acpi_device *device;
 269 };
 270
 271 struct ibm_struct {
 272         char *name;
 273
 274         int (*read) (struct seq_file *);
 275         int (*write) (char *);
 276         void (*exit) (void);
 277         void (*resume) (void);
 278         void (*suspend) (void);
 279         void (*shutdown) (void);
 280
 281         struct list_head all_drivers;
 282
 283         struct tp_acpi_drv_struct *acpi;
 284
 285         struct {
 286                 u8 acpi_driver_registered:1;
 287                 u8 acpi_notify_installed:1;
 288                 u8 proc_created:1;
 289                 u8 init_called:1;
 290                 u8 experimental:1;
 291         } flags;
 292 };
 293
 294 struct ibm_init_struct {
 295         char param[32];
 296
 297         int (*init) (struct ibm_init_struct *);
 298         umode_t base_procfs_mode;
 299         struct ibm_struct *data;
 300 };
 301
 302 static struct {
 303         u32 bluetooth:1;
 304         u32 hotkey:1;
 305         u32 hotkey_mask:1;
 306         u32 hotkey_wlsw:1;
 307         enum {
 308                 TP_HOTKEY_TABLET_NONE = 0,
 309                 TP_HOTKEY_TABLET_USES_MHKG,
 310                 TP_HOTKEY_TABLET_USES_GMMS,
 311         } hotkey_tablet;
 312         u32 kbdlight:1;
 313         u32 light:1;
 314         u32 light_status:1;
 315         u32 bright_acpimode:1;
 316         u32 bright_unkfw:1;
 317         u32 wan:1;
 318         u32 uwb:1;
 319         u32 fan_ctrl_status_undef:1;
 320         u32 second_fan:1;
 321         u32 beep_needs_two_args:1;
 322         u32 mixer_no_level_control:1;
 323         u32 battery_force_primary:1;
 324         u32 input_device_registered:1;
 325         u32 platform_drv_registered:1;
 326         u32 platform_drv_attrs_registered:1;
 327         u32 sensors_pdrv_registered:1;
 328         u32 sensors_pdrv_attrs_registered:1;
 329         u32 sensors_pdev_attrs_registered:1;
 330         u32 hotkey_poll_active:1;
 331         u32 has_adaptive_kbd:1;
 332 } tp_features;
 333
 334 static struct {
 335         u16 hotkey_mask_ff:1;
 336         u16 volume_ctrl_forbidden:1;
 337 } tp_warned;
 338
 339 struct thinkpad_id_data {
 340         unsigned int vendor;    /* ThinkPad vendor:
 341                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 342
 343         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 344         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 345
 346         u32 bios_model;         /* 1Y = 0x3159, 0 = unknown */
 347         u32 ec_model;
 348         u16 bios_release;       /* 1ZETK1WW = 0x4b31, 0 = unknown */
 349         u16 ec_release;
 350
 351         char *model_str;        /* ThinkPad T43 */
 352         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 353 };
 354 static struct thinkpad_id_data thinkpad_id;
 355
 356 static enum {
 357         TPACPI_LIFE_INIT = 0,
 358         TPACPI_LIFE_RUNNING,
 359         TPACPI_LIFE_EXITING,
 360 } tpacpi_lifecycle;
 361
 362 static int experimental;
 363 static u32 dbg_level;
 364
 365 static struct workqueue_struct *tpacpi_wq;
 366
 367 enum led_status_t {
 368         TPACPI_LED_OFF = 0,
 369         TPACPI_LED_ON,
 370         TPACPI_LED_BLINK,
 371 };
 372
 373 /* tpacpi LED class */
 374 struct tpacpi_led_classdev {
 375         struct led_classdev led_classdev;
 376         int led;
 377 };
 378
 379 /* brightness level capabilities */
 380 static unsigned int bright_maxlvl;      /* 0 = unknown */
 381
 382 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 383 static int dbg_wlswemul;
 384 static bool tpacpi_wlsw_emulstate;
 385 static int dbg_bluetoothemul;
 386 static bool tpacpi_bluetooth_emulstate;
 387 static int dbg_wwanemul;
 388 static bool tpacpi_wwan_emulstate;
 389 static int dbg_uwbemul;
 390 static bool tpacpi_uwb_emulstate;
 391 #endif
 392
 393
 394 /*************************************************************************
 395  *  Debugging helpers
 396  */
 397
 398 #define dbg_printk(a_dbg_level, format, arg...)                         \
 399 do {                                                                    \
 400         if (dbg_level & (a_dbg_level))                                  \
 401                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 402                        __func__, ##arg);                                \
 403 } while (0)
 404
 405 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 406 #define vdbg_printk dbg_printk
 407 static const char *str_supported(int is_supported);
 408 #else
 409 static inline const char *str_supported(int is_supported) { return ""; }
 410 #define vdbg_printk(a_dbg_level, format, arg...)        \
 411         do { if (0) no_printk(format, ##arg); } while (0)
 412 #endif
 413
 414 static void tpacpi_log_usertask(const char * const what)
 415 {
 416         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 417                what, task_tgid_vnr(current));
 418 }
 419
 420 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 421 do {                                                                    \
 422         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 423                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 424                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 425                        what, task_tgid_vnr(current), ## arg);           \
 426         }                                                               \
 427 } while (0)
 428
 429 /*
 430  * Quirk handling helpers
 431  *
 432  * ThinkPad IDs and versions seen in the field so far are
 433  * two or three characters from the set [0-9A-Z], i.e. base 36.
 434  *
 435  * We use values well outside that range as specials.
 436  */
 437
 438 #define TPACPI_MATCH_ANY                0xffffffffU
 439 #define TPACPI_MATCH_ANY_VERSION        0xffffU
 440 #define TPACPI_MATCH_UNKNOWN            0U
 441
 442 /* TPID('1', 'Y') == 0x3159 */
 443 #define TPID(__c1, __c2)        (((__c1) << 8) | (__c2))
 444 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3))
 445 #define TPVER TPID
 446
 447 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 448         { .vendor = PCI_VENDOR_ID_IBM,          \
 449           .bios = TPID(__id1, __id2),           \
 450           .ec = TPACPI_MATCH_ANY,               \
 451           .quirks = (__quirk) }
 452
 453 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 454         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 455           .bios = TPID(__id1, __id2),           \
 456           .ec = TPACPI_MATCH_ANY,               \
 457           .quirks = (__quirk) }
 458
 459 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
 460         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 461           .bios = TPID3(__id1, __id2, __id3),   \
 462           .ec = TPACPI_MATCH_ANY,               \
 463           .quirks = (__quirk) }
 464
 465 #define TPACPI_QEC_IBM(__id1, __id2, __quirk)   \
 466         { .vendor = PCI_VENDOR_ID_IBM,          \
 467           .bios = TPACPI_MATCH_ANY,             \
 468           .ec = TPID(__id1, __id2),             \
 469           .quirks = (__quirk) }
 470
 471 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 472         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 473           .bios = TPACPI_MATCH_ANY,             \
 474           .ec = TPID(__id1, __id2),             \
 475           .quirks = (__quirk) }
 476
 477 struct tpacpi_quirk {
 478         unsigned int vendor;
 479         u32 bios;
 480         u32 ec;
 481         unsigned long quirks;
 482 };
 483
 484 /**
 485  * tpacpi_check_quirks() - search BIOS/EC version on a list
 486  * @qlist:              array of &struct tpacpi_quirk
 487  * @qlist_size:         number of elements in @qlist
 488  *
 489  * Iterates over a quirks list until one is found that matches the
 490  * ThinkPad's vendor, BIOS and EC model.
 491  *
 492  * Returns 0 if nothing matches, otherwise returns the quirks field of
 493  * the matching &struct tpacpi_quirk entry.
 494  *
 495  * The match criteria is: vendor, ec and bios much match.
 496  */
 497 static unsigned long __init tpacpi_check_quirks(
 498                         const struct tpacpi_quirk *qlist,
 499                         unsigned int qlist_size)
 500 {
 501         while (qlist_size) {
 502                 if ((qlist->vendor == thinkpad_id.vendor ||
 503                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 504                     (qlist->bios == thinkpad_id.bios_model ||
 505                                 qlist->bios == TPACPI_MATCH_ANY) &&
 506                     (qlist->ec == thinkpad_id.ec_model ||
 507                                 qlist->ec == TPACPI_MATCH_ANY))
 508                         return qlist->quirks;
 509
 510                 qlist_size--;
 511                 qlist++;
 512         }
 513         return 0;
 514 }
 515
 516 static inline bool __pure __init tpacpi_is_lenovo(void)
 517 {
 518         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 519 }
 520
 521 static inline bool __pure __init tpacpi_is_ibm(void)
 522 {
 523         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 524 }
 525
 526 /****************************************************************************
 527  ****************************************************************************
 528  *
 529  * ACPI Helpers and device model
 530  *
 531  ****************************************************************************
 532  ****************************************************************************/
 533
 534 /*************************************************************************
 535  * ACPI basic handles
 536  */
 537
 538 static acpi_handle root_handle;
 539 static acpi_handle ec_handle;
 540
 541 #define TPACPI_HANDLE(object, parent, paths...)                 \
 542         static acpi_handle  object##_handle;                    \
 543         static const acpi_handle * const object##_parent __initconst =  \
 544                                                 &parent##_handle; \
 545         static char *object##_paths[] __initdata = { paths }
 546
 547 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 548 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 549
 550 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 551                                         /* T4x, X31, X40 */
 552            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 553            "\\CMS",             /* R40, R40e */
 554            );                   /* all others */
 555
 556 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 557            "^HKEY",             /* R30, R31 */
 558            "HKEY",              /* all others */
 559            );                   /* 570 */
 560
 561 /*************************************************************************
 562  * ACPI helpers
 563  */
 564
 565 static int acpi_evalf(acpi_handle handle,
 566                       int *res, char *method, char *fmt, ...)
 567 {
 568         char *fmt0 = fmt;
 569         struct acpi_object_list params;
 570         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 571         struct acpi_buffer result, *resultp;
 572         union acpi_object out_obj;
 573         acpi_status status;
 574         va_list ap;
 575         char res_type;
 576         int success;
 577         int quiet;
 578
 579         if (!*fmt) {
 580                 pr_err("acpi_evalf() called with empty format\n");
 581                 return 0;
 582         }
 583
 584         if (*fmt == 'q') {
 585                 quiet = 1;
 586                 fmt++;
 587         } else
 588                 quiet = 0;
 589
 590         res_type = *(fmt++);
 591
 592         params.count = 0;
 593         params.pointer = &in_objs[0];
 594
 595         va_start(ap, fmt);
 596         while (*fmt) {
 597                 char c = *(fmt++);
 598                 switch (c) {
 599                 case 'd':       /* int */
 600                         in_objs[params.count].integer.value = va_arg(ap, int);
 601                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 602                         break;
 603                         /* add more types as needed */
 604                 default:
 605                         pr_err("acpi_evalf() called with invalid format character '%c'\n",
 606                                c);
 607                         va_end(ap);
 608                         return 0;
 609                 }
 610         }
 611         va_end(ap);
 612
 613         if (res_type != 'v') {
 614                 result.length = sizeof(out_obj);
 615                 result.pointer = &out_obj;
 616                 resultp = &result;
 617         } else
 618                 resultp = NULL;
 619
 620         status = acpi_evaluate_object(handle, method, &params, resultp);
 621
 622         switch (res_type) {
 623         case 'd':               /* int */
 624                 success = (status == AE_OK &&
 625                            out_obj.type == ACPI_TYPE_INTEGER);
 626                 if (success && res)
 627                         *res = out_obj.integer.value;
 628                 break;
 629         case 'v':               /* void */
 630                 success = status == AE_OK;
 631                 break;
 632                 /* add more types as needed */
 633         default:
 634                 pr_err("acpi_evalf() called with invalid format character '%c'\n",
 635                        res_type);
 636                 return 0;
 637         }
 638
 639         if (!success && !quiet)
 640                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 641                        method, fmt0, acpi_format_exception(status));
 642
 643         return success;
 644 }
 645
 646 static int acpi_ec_read(int i, u8 *p)
 647 {
 648         int v;
 649
 650         if (ecrd_handle) {
 651                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 652                         return 0;
 653                 *p = v;
 654         } else {
 655                 if (ec_read(i, p) < 0)
 656                         return 0;
 657         }
 658
 659         return 1;
 660 }
 661
 662 static int acpi_ec_write(int i, u8 v)
 663 {
 664         if (ecwr_handle) {
 665                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 666                         return 0;
 667         } else {
 668                 if (ec_write(i, v) < 0)
 669                         return 0;
 670         }
 671
 672         return 1;
 673 }
 674
 675 static int issue_thinkpad_cmos_command(int cmos_cmd)
 676 {
 677         if (!cmos_handle)
 678                 return -ENXIO;
 679
 680         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 681                 return -EIO;
 682
 683         return 0;
 684 }
 685
 686 /*************************************************************************
 687  * ACPI device model
 688  */
 689
 690 #define TPACPI_ACPIHANDLE_INIT(object) \
 691         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 692                 object##_paths, ARRAY_SIZE(object##_paths))
 693
 694 static void __init drv_acpi_handle_init(const char *name,
 695                            acpi_handle *handle, const acpi_handle parent,
 696                            char **paths, const int num_paths)
 697 {
 698         int i;
 699         acpi_status status;
 700
 701         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 702                 name);
 703
 704         for (i = 0; i < num_paths; i++) {
 705                 status = acpi_get_handle(parent, paths[i], handle);
 706                 if (ACPI_SUCCESS(status)) {
 707                         dbg_printk(TPACPI_DBG_INIT,
 708                                    "Found ACPI handle %s for %s\n",
 709                                    paths[i], name);
 710                         return;
 711                 }
 712         }
 713
 714         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 715                     name);
 716         *handle = NULL;
 717 }
 718
 719 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 720                         u32 level, void *context, void **return_value)
 721 {
 722         struct acpi_device *dev;
 723         if (!strcmp(context, "video")) {
 724                 if (acpi_bus_get_device(handle, &dev))
 725                         return AE_OK;
 726                 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
 727                         return AE_OK;
 728         }
 729
 730         *(acpi_handle *)return_value = handle;
 731
 732         return AE_CTRL_TERMINATE;
 733 }
 734
 735 static void __init tpacpi_acpi_handle_locate(const char *name,
 736                 const char *hid,
 737                 acpi_handle *handle)
 738 {
 739         acpi_status status;
 740         acpi_handle device_found;
 741
 742         BUG_ON(!name || !handle);
 743         vdbg_printk(TPACPI_DBG_INIT,
 744                         "trying to locate ACPI handle for %s, using HID %s\n",
 745                         name, hid ? hid : "NULL");
 746
 747         memset(&device_found, 0, sizeof(device_found));
 748         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 749                                   (void *)name, &device_found);
 750
 751         *handle = NULL;
 752
 753         if (ACPI_SUCCESS(status)) {
 754                 *handle = device_found;
 755                 dbg_printk(TPACPI_DBG_INIT,
 756                            "Found ACPI handle for %s\n", name);
 757         } else {
 758                 vdbg_printk(TPACPI_DBG_INIT,
 759                             "Could not locate an ACPI handle for %s: %s\n",
 760                             name, acpi_format_exception(status));
 761         }
 762 }
 763
 764 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 765 {
 766         struct ibm_struct *ibm = data;
 767
 768         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 769                 return;
 770
 771         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 772                 return;
 773
 774         ibm->acpi->notify(ibm, event);
 775 }
 776
 777 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 778 {
 779         acpi_status status;
 780         int rc;
 781
 782         BUG_ON(!ibm->acpi);
 783
 784         if (!*ibm->acpi->handle)
 785                 return 0;
 786
 787         vdbg_printk(TPACPI_DBG_INIT,
 788                 "setting up ACPI notify for %s\n", ibm->name);
 789
 790         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 791         if (rc < 0) {
 792                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 793                 return -ENODEV;
 794         }
 795
 796         ibm->acpi->device->driver_data = ibm;
 797         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 798                 TPACPI_ACPI_EVENT_PREFIX,
 799                 ibm->name);
 800
 801         status = acpi_install_notify_handler(*ibm->acpi->handle,
 802                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 803         if (ACPI_FAILURE(status)) {
 804                 if (status == AE_ALREADY_EXISTS) {
 805                         pr_notice("another device driver is already handling %s events\n",
 806                                   ibm->name);
 807                 } else {
 808                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 809                                ibm->name, acpi_format_exception(status));
 810                 }
 811                 return -ENODEV;
 812         }
 813         ibm->flags.acpi_notify_installed = 1;
 814         return 0;
 815 }
 816
 817 static int __init tpacpi_device_add(struct acpi_device *device)
 818 {
 819         return 0;
 820 }
 821
 822 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 823 {
 824         int rc;
 825
 826         dbg_printk(TPACPI_DBG_INIT,
 827                 "registering %s as an ACPI driver\n", ibm->name);
 828
 829         BUG_ON(!ibm->acpi);
 830
 831         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 832         if (!ibm->acpi->driver) {
 833                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 834                 return -ENOMEM;
 835         }
 836
 837         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 838         ibm->acpi->driver->ids = ibm->acpi->hid;
 839
 840         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 841
 842         rc = acpi_bus_register_driver(ibm->acpi->driver);
 843         if (rc < 0) {
 844                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 845                        ibm->name, rc);
 846                 kfree(ibm->acpi->driver);
 847                 ibm->acpi->driver = NULL;
 848         } else if (!rc)
 849                 ibm->flags.acpi_driver_registered = 1;
 850
 851         return rc;
 852 }
 853
 854
 855 /****************************************************************************
 856  ****************************************************************************
 857  *
 858  * Procfs Helpers
 859  *
 860  ****************************************************************************
 861  ****************************************************************************/
 862
 863 static int dispatch_proc_show(struct seq_file *m, void *v)
 864 {
 865         struct ibm_struct *ibm = m->private;
 866
 867         if (!ibm || !ibm->read)
 868                 return -EINVAL;
 869         return ibm->read(m);
 870 }
 871
 872 static int dispatch_proc_open(struct inode *inode, struct file *file)
 873 {
 874         return single_open(file, dispatch_proc_show, PDE_DATA(inode));
 875 }
 876
 877 static ssize_t dispatch_proc_write(struct file *file,
 878                         const char __user *userbuf,
 879                         size_t count, loff_t *pos)
 880 {
 881         struct ibm_struct *ibm = PDE_DATA(file_inode(file));
 882         char *kernbuf;
 883         int ret;
 884
 885         if (!ibm || !ibm->write)
 886                 return -EINVAL;
 887         if (count > PAGE_SIZE - 2)
 888                 return -EINVAL;
 889
 890         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 891         if (!kernbuf)
 892                 return -ENOMEM;
 893
 894         if (copy_from_user(kernbuf, userbuf, count)) {
 895                 kfree(kernbuf);
 896                 return -EFAULT;
 897         }
 898
 899         kernbuf[count] = 0;
 900         strcat(kernbuf, ",");
 901         ret = ibm->write(kernbuf);
 902         if (ret == 0)
 903                 ret = count;
 904
 905         kfree(kernbuf);
 906
 907         return ret;
 908 }
 909
 910 static const struct file_operations dispatch_proc_fops = {
 911         .owner          = THIS_MODULE,
 912         .open           = dispatch_proc_open,
 913         .read           = seq_read,
 914         .llseek         = seq_lseek,
 915         .release        = single_release,
 916         .write          = dispatch_proc_write,
 917 };
 918
 919 static char *next_cmd(char **cmds)
 920 {
 921         char *start = *cmds;
 922         char *end;
 923
 924         while ((end = strchr(start, ',')) && end == start)
 925                 start = end + 1;
 926
 927         if (!end)
 928                 return NULL;
 929
 930         *end = 0;
 931         *cmds = end + 1;
 932         return start;
 933 }
 934
 935
 936 /****************************************************************************
 937  ****************************************************************************
 938  *
 939  * Device model: input, hwmon and platform
 940  *
 941  ****************************************************************************
 942  ****************************************************************************/
 943
 944 static struct platform_device *tpacpi_pdev;
 945 static struct platform_device *tpacpi_sensors_pdev;
 946 static struct device *tpacpi_hwmon;
 947 static struct input_dev *tpacpi_inputdev;
 948 static struct mutex tpacpi_inputdev_send_mutex;
 949 static LIST_HEAD(tpacpi_all_drivers);
 950
 951 #ifdef CONFIG_PM_SLEEP
 952 static int tpacpi_suspend_handler(struct device *dev)
 953 {
 954         struct ibm_struct *ibm, *itmp;
 955
 956         list_for_each_entry_safe(ibm, itmp,
 957                                  &tpacpi_all_drivers,
 958                                  all_drivers) {
 959                 if (ibm->suspend)
 960                         (ibm->suspend)();
 961         }
 962
 963         return 0;
 964 }
 965
 966 static int tpacpi_resume_handler(struct device *dev)
 967 {
 968         struct ibm_struct *ibm, *itmp;
 969
 970         list_for_each_entry_safe(ibm, itmp,
 971                                  &tpacpi_all_drivers,
 972                                  all_drivers) {
 973                 if (ibm->resume)
 974                         (ibm->resume)();
 975         }
 976
 977         return 0;
 978 }
 979 #endif
 980
 981 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
 982                          tpacpi_suspend_handler, tpacpi_resume_handler);
 983
 984 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 985 {
 986         struct ibm_struct *ibm, *itmp;
 987
 988         list_for_each_entry_safe(ibm, itmp,
 989                                  &tpacpi_all_drivers,
 990                                  all_drivers) {
 991                 if (ibm->shutdown)
 992                         (ibm->shutdown)();
 993         }
 994 }
 995
 996 static struct platform_driver tpacpi_pdriver = {
 997         .driver = {
 998                 .name = TPACPI_DRVR_NAME,
 999                 .pm = &tpacpi_pm,
1000         },
1001         .shutdown = tpacpi_shutdown_handler,
1002 };
1003
1004 static struct platform_driver tpacpi_hwmon_pdriver = {
1005         .driver = {
1006                 .name = TPACPI_HWMON_DRVR_NAME,
1007         },
1008 };
1009
1010 /*************************************************************************
1011  * sysfs support helpers
1012  */
1013
1014 struct attribute_set {
1015         unsigned int members, max_members;
1016         struct attribute_group group;
1017 };
1018
1019 struct attribute_set_obj {
1020         struct attribute_set s;
1021         struct attribute *a;
1022 } __attribute__((packed));
1023
1024 static struct attribute_set *create_attr_set(unsigned int max_members,
1025                                                 const char *name)
1026 {
1027         struct attribute_set_obj *sobj;
1028
1029         if (max_members == 0)
1030                 return NULL;
1031
1032         /* Allocates space for implicit NULL at the end too */
1033         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1034                     max_members * sizeof(struct attribute *),
1035                     GFP_KERNEL);
1036         if (!sobj)
1037                 return NULL;
1038         sobj->s.max_members = max_members;
1039         sobj->s.group.attrs = &sobj->a;
1040         sobj->s.group.name = name;
1041
1042         return &sobj->s;
1043 }
1044
1045 #define destroy_attr_set(_set) \
1046         kfree(_set);
1047
1048 /* not multi-threaded safe, use it in a single thread per set */
1049 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1050 {
1051         if (!s || !attr)
1052                 return -EINVAL;
1053
1054         if (s->members >= s->max_members)
1055                 return -ENOMEM;
1056
1057         s->group.attrs[s->members] = attr;
1058         s->members++;
1059
1060         return 0;
1061 }
1062
1063 static int add_many_to_attr_set(struct attribute_set *s,
1064                         struct attribute **attr,
1065                         unsigned int count)
1066 {
1067         int i, res;
1068
1069         for (i = 0; i < count; i++) {
1070                 res = add_to_attr_set(s, attr[i]);
1071                 if (res)
1072                         return res;
1073         }
1074
1075         return 0;
1076 }
1077
1078 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1079 {
1080         sysfs_remove_group(kobj, &s->group);
1081         destroy_attr_set(s);
1082 }
1083
1084 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1085         sysfs_create_group(_kobj, &_attr_set->group)
1086
1087 static int parse_strtoul(const char *buf,
1088                 unsigned long max, unsigned long *value)
1089 {
1090         char *endp;
1091
1092         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1093         endp = skip_spaces(endp);
1094         if (*endp || *value > max)
1095                 return -EINVAL;
1096
1097         return 0;
1098 }
1099
1100 static void tpacpi_disable_brightness_delay(void)
1101 {
1102         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1103                 pr_notice("ACPI backlight control delay disabled\n");
1104 }
1105
1106 static void printk_deprecated_attribute(const char * const what,
1107                                         const char * const details)
1108 {
1109         tpacpi_log_usertask("deprecated sysfs attribute");
1110         pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1111                 what, details);
1112 }
1113
1114 /*************************************************************************
1115  * rfkill and radio control support helpers
1116  */
1117
1118 /*
1119  * ThinkPad-ACPI firmware handling model:
1120  *
1121  * WLSW (master wireless switch) is event-driven, and is common to all
1122  * firmware-controlled radios.  It cannot be controlled, just monitored,
1123  * as expected.  It overrides all radio state in firmware
1124  *
1125  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1126  * (TODO: verify how WLSW interacts with the returned radio state).
1127  *
1128  * The only time there are shadow radio state changes, is when
1129  * masked-off hotkeys are used.
1130  */
1131
1132 /*
1133  * Internal driver API for radio state:
1134  *
1135  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1136  * bool: true means radio blocked (off)
1137  */
1138 enum tpacpi_rfkill_state {
1139         TPACPI_RFK_RADIO_OFF = 0,
1140         TPACPI_RFK_RADIO_ON
1141 };
1142
1143 /* rfkill switches */
1144 enum tpacpi_rfk_id {
1145         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1146         TPACPI_RFK_WWAN_SW_ID,
1147         TPACPI_RFK_UWB_SW_ID,
1148         TPACPI_RFK_SW_MAX
1149 };
1150
1151 static const char *tpacpi_rfkill_names[] = {
1152         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1153         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1154         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1155         [TPACPI_RFK_SW_MAX] = NULL
1156 };
1157
1158 /* ThinkPad-ACPI rfkill subdriver */
1159 struct tpacpi_rfk {
1160         struct rfkill *rfkill;
1161         enum tpacpi_rfk_id id;
1162         const struct tpacpi_rfk_ops *ops;
1163 };
1164
1165 struct tpacpi_rfk_ops {
1166         /* firmware interface */
1167         int (*get_status)(void);
1168         int (*set_status)(const enum tpacpi_rfkill_state);
1169 };
1170
1171 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1172
1173 /* Query FW and update rfkill sw state for a given rfkill switch */
1174 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1175 {
1176         int status;
1177
1178         if (!tp_rfk)
1179                 return -ENODEV;
1180
1181         status = (tp_rfk->ops->get_status)();
1182         if (status < 0)
1183                 return status;
1184
1185         rfkill_set_sw_state(tp_rfk->rfkill,
1186                             (status == TPACPI_RFK_RADIO_OFF));
1187
1188         return status;
1189 }
1190
1191 /* Query FW and update rfkill sw state for all rfkill switches */
1192 static void tpacpi_rfk_update_swstate_all(void)
1193 {
1194         unsigned int i;
1195
1196         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1197                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1198 }
1199
1200 /*
1201  * Sync the HW-blocking state of all rfkill switches,
1202  * do notice it causes the rfkill core to schedule uevents
1203  */
1204 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1205 {
1206         unsigned int i;
1207         struct tpacpi_rfk *tp_rfk;
1208
1209         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1210                 tp_rfk = tpacpi_rfkill_switches[i];
1211                 if (tp_rfk) {
1212                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1213                                                 blocked)) {
1214                                 /* ignore -- we track sw block */
1215                         }
1216                 }
1217         }
1218 }
1219
1220 /* Call to get the WLSW state from the firmware */
1221 static int hotkey_get_wlsw(void);
1222
1223 /* Call to query WLSW state and update all rfkill switches */
1224 static bool tpacpi_rfk_check_hwblock_state(void)
1225 {
1226         int res = hotkey_get_wlsw();
1227         int hw_blocked;
1228
1229         /* When unknown or unsupported, we have to assume it is unblocked */
1230         if (res < 0)
1231                 return false;
1232
1233         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1234         tpacpi_rfk_update_hwblock_state(hw_blocked);
1235
1236         return hw_blocked;
1237 }
1238
1239 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1240 {
1241         struct tpacpi_rfk *tp_rfk = data;
1242         int res;
1243
1244         dbg_printk(TPACPI_DBG_RFKILL,
1245                    "request to change radio state to %s\n",
1246                    blocked ? "blocked" : "unblocked");
1247
1248         /* try to set radio state */
1249         res = (tp_rfk->ops->set_status)(blocked ?
1250                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1251
1252         /* and update the rfkill core with whatever the FW really did */
1253         tpacpi_rfk_update_swstate(tp_rfk);
1254
1255         return (res < 0) ? res : 0;
1256 }
1257
1258 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1259         .set_block = tpacpi_rfk_hook_set_block,
1260 };
1261
1262 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1263                         const struct tpacpi_rfk_ops *tp_rfkops,
1264                         const enum rfkill_type rfktype,
1265                         const char *name,
1266                         const bool set_default)
1267 {
1268         struct tpacpi_rfk *atp_rfk;
1269         int res;
1270         bool sw_state = false;
1271         bool hw_state;
1272         int sw_status;
1273
1274         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1275
1276         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1277         if (atp_rfk)
1278                 atp_rfk->rfkill = rfkill_alloc(name,
1279                                                 &tpacpi_pdev->dev,
1280                                                 rfktype,
1281                                                 &tpacpi_rfk_rfkill_ops,
1282                                                 atp_rfk);
1283         if (!atp_rfk || !atp_rfk->rfkill) {
1284                 pr_err("failed to allocate memory for rfkill class\n");
1285                 kfree(atp_rfk);
1286                 return -ENOMEM;
1287         }
1288
1289         atp_rfk->id = id;
1290         atp_rfk->ops = tp_rfkops;
1291
1292         sw_status = (tp_rfkops->get_status)();
1293         if (sw_status < 0) {
1294                 pr_err("failed to read initial state for %s, error %d\n",
1295                        name, sw_status);
1296         } else {
1297                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1298                 if (set_default) {
1299                         /* try to keep the initial state, since we ask the
1300                          * firmware to preserve it across S5 in NVRAM */
1301                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1302                 }
1303         }
1304         hw_state = tpacpi_rfk_check_hwblock_state();
1305         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1306
1307         res = rfkill_register(atp_rfk->rfkill);
1308         if (res < 0) {
1309                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1310                 rfkill_destroy(atp_rfk->rfkill);
1311                 kfree(atp_rfk);
1312                 return res;
1313         }
1314
1315         tpacpi_rfkill_switches[id] = atp_rfk;
1316
1317         pr_info("rfkill switch %s: radio is %sblocked\n",
1318                 name, (sw_state || hw_state) ? "" : "un");
1319         return 0;
1320 }
1321
1322 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1323 {
1324         struct tpacpi_rfk *tp_rfk;
1325
1326         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1327
1328         tp_rfk = tpacpi_rfkill_switches[id];
1329         if (tp_rfk) {
1330                 rfkill_unregister(tp_rfk->rfkill);
1331                 rfkill_destroy(tp_rfk->rfkill);
1332                 tpacpi_rfkill_switches[id] = NULL;
1333                 kfree(tp_rfk);
1334         }
1335 }
1336
1337 static void printk_deprecated_rfkill_attribute(const char * const what)
1338 {
1339         printk_deprecated_attribute(what,
1340                         "Please switch to generic rfkill before year 2010");
1341 }
1342
1343 /* sysfs <radio> enable ------------------------------------------------ */
1344 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1345                                             struct device_attribute *attr,
1346                                             char *buf)
1347 {
1348         int status;
1349
1350         printk_deprecated_rfkill_attribute(attr->attr.name);
1351
1352         /* This is in the ABI... */
1353         if (tpacpi_rfk_check_hwblock_state()) {
1354                 status = TPACPI_RFK_RADIO_OFF;
1355         } else {
1356                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1357                 if (status < 0)
1358                         return status;
1359         }
1360
1361         return snprintf(buf, PAGE_SIZE, "%d\n",
1362                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1363 }
1364
1365 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1366                             struct device_attribute *attr,
1367                             const char *buf, size_t count)
1368 {
1369         unsigned long t;
1370         int res;
1371
1372         printk_deprecated_rfkill_attribute(attr->attr.name);
1373
1374         if (parse_strtoul(buf, 1, &t))
1375                 return -EINVAL;
1376
1377         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1378
1379         /* This is in the ABI... */
1380         if (tpacpi_rfk_check_hwblock_state() && !!t)
1381                 return -EPERM;
1382
1383         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1384                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1385         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1386
1387         return (res < 0) ? res : count;
1388 }
1389
1390 /* procfs -------------------------------------------------------------- */
1391 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1392 {
1393         if (id >= TPACPI_RFK_SW_MAX)
1394                 seq_printf(m, "status:\t\tnot supported\n");
1395         else {
1396                 int status;
1397
1398                 /* This is in the ABI... */
1399                 if (tpacpi_rfk_check_hwblock_state()) {
1400                         status = TPACPI_RFK_RADIO_OFF;
1401                 } else {
1402                         status = tpacpi_rfk_update_swstate(
1403                                                 tpacpi_rfkill_switches[id]);
1404                         if (status < 0)
1405                                 return status;
1406                 }
1407
1408                 seq_printf(m, "status:\t\t%s\n",
1409                                 (status == TPACPI_RFK_RADIO_ON) ?
1410                                         "enabled" : "disabled");
1411                 seq_printf(m, "commands:\tenable, disable\n");
1412         }
1413
1414         return 0;
1415 }
1416
1417 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1418 {
1419         char *cmd;
1420         int status = -1;
1421         int res = 0;
1422
1423         if (id >= TPACPI_RFK_SW_MAX)
1424                 return -ENODEV;
1425
1426         while ((cmd = next_cmd(&buf))) {
1427                 if (strlencmp(cmd, "enable") == 0)
1428                         status = TPACPI_RFK_RADIO_ON;
1429                 else if (strlencmp(cmd, "disable") == 0)
1430                         status = TPACPI_RFK_RADIO_OFF;
1431                 else
1432                         return -EINVAL;
1433         }
1434
1435         if (status != -1) {
1436                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1437                                 (status == TPACPI_RFK_RADIO_ON) ?
1438                                                 "enable" : "disable",
1439                                 tpacpi_rfkill_names[id]);
1440                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1441                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1442         }
1443
1444         return res;
1445 }
1446
1447 /*************************************************************************
1448  * thinkpad-acpi driver attributes
1449  */
1450
1451 /* interface_version --------------------------------------------------- */
1452 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1453 {
1454         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1455 }
1456 static DRIVER_ATTR_RO(interface_version);
1457
1458 /* debug_level --------------------------------------------------------- */
1459 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1460 {
1461         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1462 }
1463
1464 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1465                                  size_t count)
1466 {
1467         unsigned long t;
1468
1469         if (parse_strtoul(buf, 0xffff, &t))
1470                 return -EINVAL;
1471
1472         dbg_level = t;
1473
1474         return count;
1475 }
1476 static DRIVER_ATTR_RW(debug_level);
1477
1478 /* version ------------------------------------------------------------- */
1479 static ssize_t version_show(struct device_driver *drv, char *buf)
1480 {
1481         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1482                         TPACPI_DESC, TPACPI_VERSION);
1483 }
1484 static DRIVER_ATTR_RO(version);
1485
1486 /* --------------------------------------------------------------------- */
1487
1488 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1489
1490 /* wlsw_emulstate ------------------------------------------------------ */
1491 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1492 {
1493         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1494 }
1495
1496 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1497                                     size_t count)
1498 {
1499         unsigned long t;
1500
1501         if (parse_strtoul(buf, 1, &t))
1502                 return -EINVAL;
1503
1504         if (tpacpi_wlsw_emulstate != !!t) {
1505                 tpacpi_wlsw_emulstate = !!t;
1506                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1507         }
1508
1509         return count;
1510 }
1511 static DRIVER_ATTR_RW(wlsw_emulstate);
1512
1513 /* bluetooth_emulstate ------------------------------------------------- */
1514 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1515 {
1516         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1517 }
1518
1519 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1520                                          const char *buf, size_t count)
1521 {
1522         unsigned long t;
1523
1524         if (parse_strtoul(buf, 1, &t))
1525                 return -EINVAL;
1526
1527         tpacpi_bluetooth_emulstate = !!t;
1528
1529         return count;
1530 }
1531 static DRIVER_ATTR_RW(bluetooth_emulstate);
1532
1533 /* wwan_emulstate ------------------------------------------------- */
1534 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1535 {
1536         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1537 }
1538
1539 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1540                                     size_t count)
1541 {
1542         unsigned long t;
1543
1544         if (parse_strtoul(buf, 1, &t))
1545                 return -EINVAL;
1546
1547         tpacpi_wwan_emulstate = !!t;
1548
1549         return count;
1550 }
1551 static DRIVER_ATTR_RW(wwan_emulstate);
1552
1553 /* uwb_emulstate ------------------------------------------------- */
1554 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1555 {
1556         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1557 }
1558
1559 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1560                                    size_t count)
1561 {
1562         unsigned long t;
1563
1564         if (parse_strtoul(buf, 1, &t))
1565                 return -EINVAL;
1566
1567         tpacpi_uwb_emulstate = !!t;
1568
1569         return count;
1570 }
1571 static DRIVER_ATTR_RW(uwb_emulstate);
1572 #endif
1573
1574 /* --------------------------------------------------------------------- */
1575
1576 static struct driver_attribute *tpacpi_driver_attributes[] = {
1577         &driver_attr_debug_level, &driver_attr_version,
1578         &driver_attr_interface_version,
1579 };
1580
1581 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1582 {
1583         int i, res;
1584
1585         i = 0;
1586         res = 0;
1587         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1588                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1589                 i++;
1590         }
1591
1592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1593         if (!res && dbg_wlswemul)
1594                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1595         if (!res && dbg_bluetoothemul)
1596                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1597         if (!res && dbg_wwanemul)
1598                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1599         if (!res && dbg_uwbemul)
1600                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1601 #endif
1602
1603         return res;
1604 }
1605
1606 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1607 {
1608         int i;
1609
1610         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1611                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1612
1613 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1614         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1615         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1616         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1617         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1618 #endif
1619 }
1620
1621 /*************************************************************************
1622  * Firmware Data
1623  */
1624
1625 /*
1626  * Table of recommended minimum BIOS versions
1627  *
1628  * Reasons for listing:
1629  *    1. Stable BIOS, listed because the unknown amount of
1630  *       bugs and bad ACPI behaviour on older versions
1631  *
1632  *    2. BIOS or EC fw with known bugs that trigger on Linux
1633  *
1634  *    3. BIOS with known reduced functionality in older versions
1635  *
1636  *  We recommend the latest BIOS and EC version.
1637  *  We only support the latest BIOS and EC fw version as a rule.
1638  *
1639  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1640  *  Information from users in ThinkWiki
1641  *
1642  *  WARNING: we use this table also to detect that the machine is
1643  *  a ThinkPad in some cases, so don't remove entries lightly.
1644  */
1645
1646 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1647         { .vendor       = (__v),                        \
1648           .bios         = TPID(__id1, __id2),           \
1649           .ec           = TPACPI_MATCH_ANY,             \
1650           .quirks       = TPACPI_MATCH_ANY_VERSION << 16 \
1651                           | TPVER(__bv1, __bv2) }
1652
1653 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1654                 __eid, __ev1, __ev2)                    \
1655         { .vendor       = (__v),                        \
1656           .bios         = TPID(__bid1, __bid2),         \
1657           .ec           = __eid,                        \
1658           .quirks       = TPVER(__ev1, __ev2) << 16     \
1659                           | TPVER(__bv1, __bv2) }
1660
1661 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1662         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1663
1664 /* Outdated IBM BIOSes often lack the EC id string */
1665 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1666         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1667                 __bv1, __bv2, TPID(__id1, __id2),       \
1668                 __ev1, __ev2),                          \
1669         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1670                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1671                 __ev1, __ev2)
1672
1673 /* Outdated IBM BIOSes often lack the EC id string */
1674 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1675                 __eid1, __eid2, __ev1, __ev2)           \
1676         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1677                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1678                 __ev1, __ev2),                          \
1679         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1680                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1681                 __ev1, __ev2)
1682
1683 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1684         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1685
1686 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1687         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1688                 __bv1, __bv2, TPID(__id1, __id2),       \
1689                 __ev1, __ev2)
1690
1691 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1692                 __eid1, __eid2, __ev1, __ev2)           \
1693         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1694                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1695                 __ev1, __ev2)
1696
1697 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1698         /*  Numeric models ------------------ */
1699         /*      FW MODEL   BIOS VERS          */
1700         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1701         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1702         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1703         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1704         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1705         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1706         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1707         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1708         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1709
1710         /* A-series ------------------------- */
1711         /*      FW MODEL   BIOS VERS  EC VERS */
1712         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1713         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1714         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1715         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1716         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1717         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1718         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1719         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1720         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1721         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1722         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1723
1724         /* G-series ------------------------- */
1725         /*      FW MODEL   BIOS VERS          */
1726         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1727         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1728
1729         /* R-series, T-series --------------- */
1730         /*      FW MODEL   BIOS VERS  EC VERS */
1731         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1732         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1733         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1734         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1735         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1736         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1737         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1738                                                     T40/p, T41/p, T42/p (1) */
1739         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1740         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1741         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1742         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1743
1744         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1745         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1746         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1747         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1748         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1749         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1750
1751         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1752         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1753         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1754
1755         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1756         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1757         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1758
1759         /* X-series ------------------------- */
1760         /*      FW MODEL   BIOS VERS  EC VERS */
1761         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1762         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1763         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1764         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1765         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1766         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1767         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1768
1769         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1770         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1771
1772         /* (0) - older versions lack DMI EC fw string and functionality */
1773         /* (1) - older versions known to lack functionality */
1774 };
1775
1776 #undef TPV_QL1
1777 #undef TPV_QL0
1778 #undef TPV_QI2
1779 #undef TPV_QI1
1780 #undef TPV_QI0
1781 #undef TPV_Q_X
1782 #undef TPV_Q
1783
1784 static void __init tpacpi_check_outdated_fw(void)
1785 {
1786         unsigned long fwvers;
1787         u16 ec_version, bios_version;
1788
1789         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1790                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1791
1792         if (!fwvers)
1793                 return;
1794
1795         bios_version = fwvers & 0xffffU;
1796         ec_version = (fwvers >> 16) & 0xffffU;
1797
1798         /* note that unknown versions are set to 0x0000 and we use that */
1799         if ((bios_version > thinkpad_id.bios_release) ||
1800             (ec_version > thinkpad_id.ec_release &&
1801                                 ec_version != TPACPI_MATCH_ANY_VERSION)) {
1802                 /*
1803                  * The changelogs would let us track down the exact
1804                  * reason, but it is just too much of a pain to track
1805                  * it.  We only list BIOSes that are either really
1806                  * broken, or really stable to begin with, so it is
1807                  * best if the user upgrades the firmware anyway.
1808                  */
1809                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1810                 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1811         }
1812 }
1813
1814 static bool __init tpacpi_is_fw_known(void)
1815 {
1816         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1817                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1818 }
1819
1820 /****************************************************************************
1821  ****************************************************************************
1822  *
1823  * Subdrivers
1824  *
1825  ****************************************************************************
1826  ****************************************************************************/
1827
1828 /*************************************************************************
1829  * thinkpad-acpi metadata subdriver
1830  */
1831
1832 static int thinkpad_acpi_driver_read(struct seq_file *m)
1833 {
1834         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1835         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1836         return 0;
1837 }
1838
1839 static struct ibm_struct thinkpad_acpi_driver_data = {
1840         .name = "driver",
1841         .read = thinkpad_acpi_driver_read,
1842 };
1843
1844 /*************************************************************************
1845  * Hotkey subdriver
1846  */
1847
1848 /*
1849  * ThinkPad firmware event model
1850  *
1851  * The ThinkPad firmware has two main event interfaces: normal ACPI
1852  * notifications (which follow the ACPI standard), and a private event
1853  * interface.
1854  *
1855  * The private event interface also issues events for the hotkeys.  As
1856  * the driver gained features, the event handling code ended up being
1857  * built around the hotkey subdriver.  This will need to be refactored
1858  * to a more formal event API eventually.
1859  *
1860  * Some "hotkeys" are actually supposed to be used as event reports,
1861  * such as "brightness has changed", "volume has changed", depending on
1862  * the ThinkPad model and how the firmware is operating.
1863  *
1864  * Unlike other classes, hotkey-class events have mask/unmask control on
1865  * non-ancient firmware.  However, how it behaves changes a lot with the
1866  * firmware model and version.
1867  */
1868
1869 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1870         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1871         TP_ACPI_HOTKEYSCAN_FNF2,
1872         TP_ACPI_HOTKEYSCAN_FNF3,
1873         TP_ACPI_HOTKEYSCAN_FNF4,
1874         TP_ACPI_HOTKEYSCAN_FNF5,
1875         TP_ACPI_HOTKEYSCAN_FNF6,
1876         TP_ACPI_HOTKEYSCAN_FNF7,
1877         TP_ACPI_HOTKEYSCAN_FNF8,
1878         TP_ACPI_HOTKEYSCAN_FNF9,
1879         TP_ACPI_HOTKEYSCAN_FNF10,
1880         TP_ACPI_HOTKEYSCAN_FNF11,
1881         TP_ACPI_HOTKEYSCAN_FNF12,
1882         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1883         TP_ACPI_HOTKEYSCAN_FNINSERT,
1884         TP_ACPI_HOTKEYSCAN_FNDELETE,
1885         TP_ACPI_HOTKEYSCAN_FNHOME,
1886         TP_ACPI_HOTKEYSCAN_FNEND,
1887         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1888         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1889         TP_ACPI_HOTKEYSCAN_FNSPACE,
1890         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1891         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1892         TP_ACPI_HOTKEYSCAN_MUTE,
1893         TP_ACPI_HOTKEYSCAN_THINKPAD,
1894         TP_ACPI_HOTKEYSCAN_UNK1,
1895         TP_ACPI_HOTKEYSCAN_UNK2,
1896         TP_ACPI_HOTKEYSCAN_UNK3,
1897         TP_ACPI_HOTKEYSCAN_UNK4,
1898         TP_ACPI_HOTKEYSCAN_UNK5,
1899         TP_ACPI_HOTKEYSCAN_UNK6,
1900         TP_ACPI_HOTKEYSCAN_UNK7,
1901         TP_ACPI_HOTKEYSCAN_UNK8,
1902
1903         /* Adaptive keyboard keycodes */
1904         TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1905         TP_ACPI_HOTKEYSCAN_MUTE2        = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1906         TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1907         TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1908         TP_ACPI_HOTKEYSCAN_CLOUD,
1909         TP_ACPI_HOTKEYSCAN_UNK9,
1910         TP_ACPI_HOTKEYSCAN_VOICE,
1911         TP_ACPI_HOTKEYSCAN_UNK10,
1912         TP_ACPI_HOTKEYSCAN_GESTURES,
1913         TP_ACPI_HOTKEYSCAN_UNK11,
1914         TP_ACPI_HOTKEYSCAN_UNK12,
1915         TP_ACPI_HOTKEYSCAN_UNK13,
1916         TP_ACPI_HOTKEYSCAN_CONFIG,
1917         TP_ACPI_HOTKEYSCAN_NEW_TAB,
1918         TP_ACPI_HOTKEYSCAN_RELOAD,
1919         TP_ACPI_HOTKEYSCAN_BACK,
1920         TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1921         TP_ACPI_HOTKEYSCAN_MIC_UP,
1922         TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1923         TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1924         TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1925
1926         /* Lenovo extended keymap, starting at 0x1300 */
1927         TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1928         /* first new observed key (star, favorites) is 0x1311 */
1929         TP_ACPI_HOTKEYSCAN_STAR = 69,
1930         TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1931         TP_ACPI_HOTKEYSCAN_CALCULATOR,
1932         TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1933         TP_ACPI_HOTKEYSCAN_KEYBOARD,
1934
1935         /* Hotkey keymap size */
1936         TPACPI_HOTKEY_MAP_LEN
1937 };
1938
1939 enum {  /* Keys/events available through NVRAM polling */
1940         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1941         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1942 };
1943
1944 enum {  /* Positions of some of the keys in hotkey masks */
1945         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1946         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1947         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1948         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1949         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1950         TP_ACPI_HKEY_KBD_LIGHT_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1951         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1952         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1953         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1954         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1955         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1956 };
1957
1958 enum {  /* NVRAM to ACPI HKEY group map */
1959         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1960                                           TP_ACPI_HKEY_ZOOM_MASK |
1961                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1962                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1963         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1964                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1965         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1966                                           TP_ACPI_HKEY_VOLDWN_MASK |
1967                                           TP_ACPI_HKEY_MUTE_MASK,
1968 };
1969
1970 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1971 struct tp_nvram_state {
1972        u16 thinkpad_toggle:1;
1973        u16 zoom_toggle:1;
1974        u16 display_toggle:1;
1975        u16 thinklight_toggle:1;
1976        u16 hibernate_toggle:1;
1977        u16 displayexp_toggle:1;
1978        u16 display_state:1;
1979        u16 brightness_toggle:1;
1980        u16 volume_toggle:1;
1981        u16 mute:1;
1982
1983        u8 brightness_level;
1984        u8 volume_level;
1985 };
1986
1987 /* kthread for the hotkey poller */
1988 static struct task_struct *tpacpi_hotkey_task;
1989
1990 /*
1991  * Acquire mutex to write poller control variables as an
1992  * atomic block.
1993  *
1994  * Increment hotkey_config_change when changing them if you
1995  * want the kthread to forget old state.
1996  *
1997  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1998  */
1999 static struct mutex hotkey_thread_data_mutex;
2000 static unsigned int hotkey_config_change;
2001
2002 /*
2003  * hotkey poller control variables
2004  *
2005  * Must be atomic or readers will also need to acquire mutex
2006  *
2007  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2008  * should be used only when the changes need to be taken as
2009  * a block, OR when one needs to force the kthread to forget
2010  * old state.
2011  */
2012 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2013 static unsigned int hotkey_poll_freq = 10; /* Hz */
2014
2015 #define HOTKEY_CONFIG_CRITICAL_START \
2016         do { \
2017                 mutex_lock(&hotkey_thread_data_mutex); \
2018                 hotkey_config_change++; \
2019         } while (0);
2020 #define HOTKEY_CONFIG_CRITICAL_END \
2021         mutex_unlock(&hotkey_thread_data_mutex);
2022
2023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2024
2025 #define hotkey_source_mask 0U
2026 #define HOTKEY_CONFIG_CRITICAL_START
2027 #define HOTKEY_CONFIG_CRITICAL_END
2028
2029 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2030
2031 static struct mutex hotkey_mutex;
2032
2033 static enum {   /* Reasons for waking up */
2034         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2035         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2036         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2037 } hotkey_wakeup_reason;
2038
2039 static int hotkey_autosleep_ack;
2040
2041 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2042 static u32 hotkey_all_mask;             /* all events supported in fw */
2043 static u32 hotkey_adaptive_all_mask;    /* all adaptive events supported in fw */
2044 static u32 hotkey_reserved_mask;        /* events better left disabled */
2045 static u32 hotkey_driver_mask;          /* events needed by the driver */
2046 static u32 hotkey_user_mask;            /* events visible to userspace */
2047 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2048
2049 static u16 *hotkey_keycode_map;
2050
2051 static struct attribute_set *hotkey_dev_attributes;
2052
2053 static void tpacpi_driver_event(const unsigned int hkey_event);
2054 static void hotkey_driver_event(const unsigned int scancode);
2055 static void hotkey_poll_setup(const bool may_warn);
2056
2057 /* HKEY.MHKG() return bits */
2058 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2059 enum {
2060         TP_ACPI_MULTI_MODE_INVALID      = 0,
2061         TP_ACPI_MULTI_MODE_UNKNOWN      = 1 << 0,
2062         TP_ACPI_MULTI_MODE_LAPTOP       = 1 << 1,
2063         TP_ACPI_MULTI_MODE_TABLET       = 1 << 2,
2064         TP_ACPI_MULTI_MODE_FLAT         = 1 << 3,
2065         TP_ACPI_MULTI_MODE_STAND        = 1 << 4,
2066         TP_ACPI_MULTI_MODE_TENT         = 1 << 5,
2067         TP_ACPI_MULTI_MODE_STAND_TENT   = 1 << 6,
2068 };
2069
2070 enum {
2071         /* The following modes are considered tablet mode for the purpose of
2072          * reporting the status to userspace. i.e. in all these modes it makes
2073          * sense to disable the laptop input devices such as touchpad and
2074          * keyboard.
2075          */
2076         TP_ACPI_MULTI_MODE_TABLET_LIKE  = TP_ACPI_MULTI_MODE_TABLET |
2077                                           TP_ACPI_MULTI_MODE_STAND |
2078                                           TP_ACPI_MULTI_MODE_TENT |
2079                                           TP_ACPI_MULTI_MODE_STAND_TENT,
2080 };
2081
2082 static int hotkey_get_wlsw(void)
2083 {
2084         int status;
2085
2086         if (!tp_features.hotkey_wlsw)
2087                 return -ENODEV;
2088
2089 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2090         if (dbg_wlswemul)
2091                 return (tpacpi_wlsw_emulstate) ?
2092                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2093 #endif
2094
2095         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2096                 return -EIO;
2097
2098         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2099 }
2100
2101 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
2102 {
2103         int type = (s >> 16) & 0xffff;
2104         int value = s & 0xffff;
2105         int mode = TP_ACPI_MULTI_MODE_INVALID;
2106         int valid_modes = 0;
2107
2108         if (has_tablet_mode)
2109                 *has_tablet_mode = 0;
2110
2111         switch (type) {
2112         case 1:
2113                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2114                               TP_ACPI_MULTI_MODE_TABLET |
2115                               TP_ACPI_MULTI_MODE_STAND_TENT;
2116                 break;
2117         case 2:
2118                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2119                               TP_ACPI_MULTI_MODE_FLAT |
2120                               TP_ACPI_MULTI_MODE_TABLET |
2121                               TP_ACPI_MULTI_MODE_STAND |
2122                               TP_ACPI_MULTI_MODE_TENT;
2123                 break;
2124         case 3:
2125                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2126                               TP_ACPI_MULTI_MODE_FLAT;
2127                 break;
2128         case 4:
2129         case 5:
2130                 /* In mode 4, FLAT is not specified as a valid mode. However,
2131                  * it can be seen at least on the X1 Yoga 2nd Generation.
2132                  */
2133                 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
2134                               TP_ACPI_MULTI_MODE_FLAT |
2135                               TP_ACPI_MULTI_MODE_TABLET |
2136                               TP_ACPI_MULTI_MODE_STAND |
2137                               TP_ACPI_MULTI_MODE_TENT;
2138                 break;
2139         default:
2140                 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2141                        type, value, TPACPI_MAIL);
2142                 return 0;
2143         }
2144
2145         if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2146                 *has_tablet_mode = 1;
2147
2148         switch (value) {
2149         case 1:
2150                 mode = TP_ACPI_MULTI_MODE_LAPTOP;
2151                 break;
2152         case 2:
2153                 mode = TP_ACPI_MULTI_MODE_FLAT;
2154                 break;
2155         case 3:
2156                 mode = TP_ACPI_MULTI_MODE_TABLET;
2157                 break;
2158         case 4:
2159                 if (type == 1)
2160                         mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2161                 else
2162                         mode = TP_ACPI_MULTI_MODE_STAND;
2163                 break;
2164         case 5:
2165                 mode = TP_ACPI_MULTI_MODE_TENT;
2166                 break;
2167         default:
2168                 if (type == 5 && value == 0xffff) {
2169                         pr_warn("Multi mode status is undetected, assuming laptop\n");
2170                         return 0;
2171                 }
2172         }
2173
2174         if (!(mode & valid_modes)) {
2175                 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2176                        value, type, TPACPI_MAIL);
2177                 return 0;
2178         }
2179
2180         return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2181 }
2182
2183 static int hotkey_get_tablet_mode(int *status)
2184 {
2185         int s;
2186
2187         switch (tp_features.hotkey_tablet) {
2188         case TP_HOTKEY_TABLET_USES_MHKG:
2189                 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2190                         return -EIO;
2191
2192                 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2193                 break;
2194         case TP_HOTKEY_TABLET_USES_GMMS:
2195                 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2196                         return -EIO;
2197
2198                 *status = hotkey_gmms_get_tablet_mode(s, NULL);
2199                 break;
2200         default:
2201                 break;
2202         }
2203
2204         return 0;
2205 }
2206
2207 /*
2208  * Reads current event mask from firmware, and updates
2209  * hotkey_acpi_mask accordingly.  Also resets any bits
2210  * from hotkey_user_mask that are unavailable to be
2211  * delivered (shadow requirement of the userspace ABI).
2212  *
2213  * Call with hotkey_mutex held
2214  */
2215 static int hotkey_mask_get(void)
2216 {
2217         if (tp_features.hotkey_mask) {
2218                 u32 m = 0;
2219
2220                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2221                         return -EIO;
2222
2223                 hotkey_acpi_mask = m;
2224         } else {
2225                 /* no mask support doesn't mean no event support... */
2226                 hotkey_acpi_mask = hotkey_all_mask;
2227         }
2228
2229         /* sync userspace-visible mask */
2230         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2231
2232         return 0;
2233 }
2234
2235 static void hotkey_mask_warn_incomplete_mask(void)
2236 {
2237         /* log only what the user can fix... */
2238         const u32 wantedmask = hotkey_driver_mask &
2239                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2240                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2241
2242         if (wantedmask)
2243                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2244 }
2245
2246 /*
2247  * Set the firmware mask when supported
2248  *
2249  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2250  *
2251  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2252  *
2253  * Call with hotkey_mutex held
2254  */
2255 static int hotkey_mask_set(u32 mask)
2256 {
2257         int i;
2258         int rc = 0;
2259
2260         const u32 fwmask = mask & ~hotkey_source_mask;
2261
2262         if (tp_features.hotkey_mask) {
2263                 for (i = 0; i < 32; i++) {
2264                         if (!acpi_evalf(hkey_handle,
2265                                         NULL, "MHKM", "vdd", i + 1,
2266                                         !!(mask & (1 << i)))) {
2267                                 rc = -EIO;
2268                                 break;
2269                         }
2270                 }
2271         }
2272
2273         /*
2274          * We *must* make an inconditional call to hotkey_mask_get to
2275          * refresh hotkey_acpi_mask and update hotkey_user_mask
2276          *
2277          * Take the opportunity to also log when we cannot _enable_
2278          * a given event.
2279          */
2280         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2281                 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2282                           fwmask, hotkey_acpi_mask);
2283         }
2284
2285         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2286                 hotkey_mask_warn_incomplete_mask();
2287
2288         return rc;
2289 }
2290
2291 /*
2292  * Sets hotkey_user_mask and tries to set the firmware mask
2293  *
2294  * Call with hotkey_mutex held
2295  */
2296 static int hotkey_user_mask_set(const u32 mask)
2297 {
2298         int rc;
2299
2300         /* Give people a chance to notice they are doing something that
2301          * is bound to go boom on their users sooner or later */
2302         if (!tp_warned.hotkey_mask_ff &&
2303             (mask == 0xffff || mask == 0xffffff ||
2304              mask == 0xffffffff)) {
2305                 tp_warned.hotkey_mask_ff = 1;
2306                 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2307                           mask);
2308                 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2309         }
2310
2311         /* Try to enable what the user asked for, plus whatever we need.
2312          * this syncs everything but won't enable bits in hotkey_user_mask */
2313         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2314
2315         /* Enable the available bits in hotkey_user_mask */
2316         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2317
2318         return rc;
2319 }
2320
2321 /*
2322  * Sets the driver hotkey mask.
2323  *
2324  * Can be called even if the hotkey subdriver is inactive
2325  */
2326 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2327 {
2328         int rc;
2329
2330         /* Do the right thing if hotkey_init has not been called yet */
2331         if (!tp_features.hotkey) {
2332                 hotkey_driver_mask = mask;
2333                 return 0;
2334         }
2335
2336         mutex_lock(&hotkey_mutex);
2337
2338         HOTKEY_CONFIG_CRITICAL_START
2339         hotkey_driver_mask = mask;
2340 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2341         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2342 #endif
2343         HOTKEY_CONFIG_CRITICAL_END
2344
2345         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2346                                                         ~hotkey_source_mask);
2347         hotkey_poll_setup(true);
2348
2349         mutex_unlock(&hotkey_mutex);
2350
2351         return rc;
2352 }
2353
2354 static int hotkey_status_get(int *status)
2355 {
2356         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2357                 return -EIO;
2358
2359         return 0;
2360 }
2361
2362 static int hotkey_status_set(bool enable)
2363 {
2364         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2365                 return -EIO;
2366
2367         return 0;
2368 }
2369
2370 static void tpacpi_input_send_tabletsw(void)
2371 {
2372         int state;
2373
2374         if (tp_features.hotkey_tablet &&
2375             !hotkey_get_tablet_mode(&state)) {
2376                 mutex_lock(&tpacpi_inputdev_send_mutex);
2377
2378                 input_report_switch(tpacpi_inputdev,
2379                                     SW_TABLET_MODE, !!state);
2380                 input_sync(tpacpi_inputdev);
2381
2382                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2383         }
2384 }
2385
2386 /* Do NOT call without validating scancode first */
2387 static void tpacpi_input_send_key(const unsigned int scancode)
2388 {
2389         const unsigned int keycode = hotkey_keycode_map[scancode];
2390
2391         if (keycode != KEY_RESERVED) {
2392                 mutex_lock(&tpacpi_inputdev_send_mutex);
2393
2394                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2395                 input_report_key(tpacpi_inputdev, keycode, 1);
2396                 input_sync(tpacpi_inputdev);
2397
2398                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2399                 input_report_key(tpacpi_inputdev, keycode, 0);
2400                 input_sync(tpacpi_inputdev);
2401
2402                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2403         }
2404 }
2405
2406 /* Do NOT call without validating scancode first */
2407 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2408 {
2409         hotkey_driver_event(scancode);
2410         if (hotkey_user_mask & (1 << scancode))
2411                 tpacpi_input_send_key(scancode);
2412 }
2413
2414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2416
2417 /* Do NOT call without validating scancode first */
2418 static void tpacpi_hotkey_send_key(unsigned int scancode)
2419 {
2420         tpacpi_input_send_key_masked(scancode);
2421 }
2422
2423 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2424 {
2425         u8 d;
2426
2427         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2428                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2429                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2430                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2431                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2432                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2433         }
2434         if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2435                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2436                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2437         }
2438         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2439                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2440                 n->displayexp_toggle =
2441                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2442         }
2443         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2444                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2445                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2446                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2447                 n->brightness_toggle =
2448                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2449         }
2450         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2451                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2452                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2453                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2454                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2455                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2456         }
2457 }
2458
2459 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2460 do { \
2461         if ((event_mask & (1 << __scancode)) && \
2462             oldn->__member != newn->__member) \
2463                 tpacpi_hotkey_send_key(__scancode); \
2464 } while (0)
2465
2466 #define TPACPI_MAY_SEND_KEY(__scancode) \
2467 do { \
2468         if (event_mask & (1 << __scancode)) \
2469                 tpacpi_hotkey_send_key(__scancode); \
2470 } while (0)
2471
2472 static void issue_volchange(const unsigned int oldvol,
2473                             const unsigned int newvol,
2474                             const u32 event_mask)
2475 {
2476         unsigned int i = oldvol;
2477
2478         while (i > newvol) {
2479                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2480                 i--;
2481         }
2482         while (i < newvol) {
2483                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2484                 i++;
2485         }
2486 }
2487
2488 static void issue_brightnesschange(const unsigned int oldbrt,
2489                                    const unsigned int newbrt,
2490                                    const u32 event_mask)
2491 {
2492         unsigned int i = oldbrt;
2493
2494         while (i > newbrt) {
2495                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2496                 i--;
2497         }
2498         while (i < newbrt) {
2499                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2500                 i++;
2501         }
2502 }
2503
2504 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2505                                            struct tp_nvram_state *newn,
2506                                            const u32 event_mask)
2507 {
2508
2509         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2510         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2511         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2512         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2513
2514         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2515
2516         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2517
2518         /*
2519          * Handle volume
2520          *
2521          * This code is supposed to duplicate the IBM firmware behaviour:
2522          * - Pressing MUTE issues mute hotkey message, even when already mute
2523          * - Pressing Volume up/down issues volume up/down hotkey messages,
2524          *   even when already at maximum or minimum volume
2525          * - The act of unmuting issues volume up/down notification,
2526          *   depending which key was used to unmute
2527          *
2528          * We are constrained to what the NVRAM can tell us, which is not much
2529          * and certainly not enough if more than one volume hotkey was pressed
2530          * since the last poll cycle.
2531          *
2532          * Just to make our life interesting, some newer Lenovo ThinkPads have
2533          * bugs in the BIOS and may fail to update volume_toggle properly.
2534          */
2535         if (newn->mute) {
2536                 /* muted */
2537                 if (!oldn->mute ||
2538                     oldn->volume_toggle != newn->volume_toggle ||
2539                     oldn->volume_level != newn->volume_level) {
2540                         /* recently muted, or repeated mute keypress, or
2541                          * multiple presses ending in mute */
2542                         issue_volchange(oldn->volume_level, newn->volume_level,
2543                                 event_mask);
2544                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2545                 }
2546         } else {
2547                 /* unmute */
2548                 if (oldn->mute) {
2549                         /* recently unmuted, issue 'unmute' keypress */
2550                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2551                 }
2552                 if (oldn->volume_level != newn->volume_level) {
2553                         issue_volchange(oldn->volume_level, newn->volume_level,
2554                                 event_mask);
2555                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2556                         /* repeated vol up/down keypress at end of scale ? */
2557                         if (newn->volume_level == 0)
2558                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2559                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2560                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2561                 }
2562         }
2563
2564         /* handle brightness */
2565         if (oldn->brightness_level != newn->brightness_level) {
2566                 issue_brightnesschange(oldn->brightness_level,
2567                                        newn->brightness_level, event_mask);
2568         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2569                 /* repeated key presses that didn't change state */
2570                 if (newn->brightness_level == 0)
2571                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2572                 else if (newn->brightness_level >= bright_maxlvl
2573                                 && !tp_features.bright_unkfw)
2574                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2575         }
2576
2577 #undef TPACPI_COMPARE_KEY
2578 #undef TPACPI_MAY_SEND_KEY
2579 }
2580
2581 /*
2582  * Polling driver
2583  *
2584  * We track all events in hotkey_source_mask all the time, since
2585  * most of them are edge-based.  We only issue those requested by
2586  * hotkey_user_mask or hotkey_driver_mask, though.
2587  */
2588 static int hotkey_kthread(void *data)
2589 {
2590         struct tp_nvram_state s[2];
2591         u32 poll_mask, event_mask;
2592         unsigned int si, so;
2593         unsigned long t;
2594         unsigned int change_detector;
2595         unsigned int poll_freq;
2596         bool was_frozen;
2597
2598         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2599                 goto exit;
2600
2601         set_freezable();
2602
2603         so = 0;
2604         si = 1;
2605         t = 0;
2606
2607         /* Initial state for compares */
2608         mutex_lock(&hotkey_thread_data_mutex);
2609         change_detector = hotkey_config_change;
2610         poll_mask = hotkey_source_mask;
2611         event_mask = hotkey_source_mask &
2612                         (hotkey_driver_mask | hotkey_user_mask);
2613         poll_freq = hotkey_poll_freq;
2614         mutex_unlock(&hotkey_thread_data_mutex);
2615         hotkey_read_nvram(&s[so], poll_mask);
2616
2617         while (!kthread_should_stop()) {
2618                 if (t == 0) {
2619                         if (likely(poll_freq))
2620                                 t = 1000/poll_freq;
2621                         else
2622                                 t = 100;        /* should never happen... */
2623                 }
2624                 t = msleep_interruptible(t);
2625                 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2626                         break;
2627
2628                 if (t > 0 && !was_frozen)
2629                         continue;
2630
2631                 mutex_lock(&hotkey_thread_data_mutex);
2632                 if (was_frozen || hotkey_config_change != change_detector) {
2633                         /* forget old state on thaw or config change */
2634                         si = so;
2635                         t = 0;
2636                         change_detector = hotkey_config_change;
2637                 }
2638                 poll_mask = hotkey_source_mask;
2639                 event_mask = hotkey_source_mask &
2640                                 (hotkey_driver_mask | hotkey_user_mask);
2641                 poll_freq = hotkey_poll_freq;
2642                 mutex_unlock(&hotkey_thread_data_mutex);
2643
2644                 if (likely(poll_mask)) {
2645                         hotkey_read_nvram(&s[si], poll_mask);
2646                         if (likely(si != so)) {
2647                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2648                                                                 event_mask);
2649                         }
2650                 }
2651
2652                 so = si;
2653                 si ^= 1;
2654         }
2655
2656 exit:
2657         return 0;
2658 }
2659
2660 /* call with hotkey_mutex held */
2661 static void hotkey_poll_stop_sync(void)
2662 {
2663         if (tpacpi_hotkey_task) {
2664                 kthread_stop(tpacpi_hotkey_task);
2665                 tpacpi_hotkey_task = NULL;
2666         }
2667 }
2668
2669 /* call with hotkey_mutex held */
2670 static void hotkey_poll_setup(const bool may_warn)
2671 {
2672         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2673         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2674
2675         if (hotkey_poll_freq > 0 &&
2676             (poll_driver_mask ||
2677              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2678                 if (!tpacpi_hotkey_task) {
2679                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2680                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2681                         if (IS_ERR(tpacpi_hotkey_task)) {
2682                                 tpacpi_hotkey_task = NULL;
2683                                 pr_err("could not create kernel thread for hotkey polling\n");
2684                         }
2685                 }
2686         } else {
2687                 hotkey_poll_stop_sync();
2688                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2689                     hotkey_poll_freq == 0) {
2690                         pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2691                                   poll_user_mask, poll_driver_mask);
2692                 }
2693         }
2694 }
2695
2696 static void hotkey_poll_setup_safe(const bool may_warn)
2697 {
2698         mutex_lock(&hotkey_mutex);
2699         hotkey_poll_setup(may_warn);
2700         mutex_unlock(&hotkey_mutex);
2701 }
2702
2703 /* call with hotkey_mutex held */
2704 static void hotkey_poll_set_freq(unsigned int freq)
2705 {
2706         if (!freq)
2707                 hotkey_poll_stop_sync();
2708
2709         hotkey_poll_freq = freq;
2710 }
2711
2712 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2713
2714 static void hotkey_poll_setup(const bool __unused)
2715 {
2716 }
2717
2718 static void hotkey_poll_setup_safe(const bool __unused)
2719 {
2720 }
2721
2722 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2723
2724 static int hotkey_inputdev_open(struct input_dev *dev)
2725 {
2726         switch (tpacpi_lifecycle) {
2727         case TPACPI_LIFE_INIT:
2728         case TPACPI_LIFE_RUNNING:
2729                 hotkey_poll_setup_safe(false);
2730                 return 0;
2731         case TPACPI_LIFE_EXITING:
2732                 return -EBUSY;
2733         }
2734
2735         /* Should only happen if tpacpi_lifecycle is corrupt */
2736         BUG();
2737         return -EBUSY;
2738 }
2739
2740 static void hotkey_inputdev_close(struct input_dev *dev)
2741 {
2742         /* disable hotkey polling when possible */
2743         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2744             !(hotkey_source_mask & hotkey_driver_mask))
2745                 hotkey_poll_setup_safe(false);
2746 }
2747
2748 /* sysfs hotkey enable ------------------------------------------------- */
2749 static ssize_t hotkey_enable_show(struct device *dev,
2750                            struct device_attribute *attr,
2751                            char *buf)
2752 {
2753         int res, status;
2754
2755         printk_deprecated_attribute("hotkey_enable",
2756                         "Hotkey reporting is always enabled");
2757
2758         res = hotkey_status_get(&status);
2759         if (res)
2760                 return res;
2761
2762         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2763 }
2764
2765 static ssize_t hotkey_enable_store(struct device *dev,
2766                             struct device_attribute *attr,
2767                             const char *buf, size_t count)
2768 {
2769         unsigned long t;
2770
2771         printk_deprecated_attribute("hotkey_enable",
2772                         "Hotkeys can be disabled through hotkey_mask");
2773
2774         if (parse_strtoul(buf, 1, &t))
2775                 return -EINVAL;
2776
2777         if (t == 0)
2778                 return -EPERM;
2779
2780         return count;
2781 }
2782
2783 static DEVICE_ATTR_RW(hotkey_enable);
2784
2785 /* sysfs hotkey mask --------------------------------------------------- */
2786 static ssize_t hotkey_mask_show(struct device *dev,
2787                            struct device_attribute *attr,
2788                            char *buf)
2789 {
2790         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2791 }
2792
2793 static ssize_t hotkey_mask_store(struct device *dev,
2794                             struct device_attribute *attr,
2795                             const char *buf, size_t count)
2796 {
2797         unsigned long t;
2798         int res;
2799
2800         if (parse_strtoul(buf, 0xffffffffUL, &t))
2801                 return -EINVAL;
2802
2803         if (mutex_lock_killable(&hotkey_mutex))
2804                 return -ERESTARTSYS;
2805
2806         res = hotkey_user_mask_set(t);
2807
2808 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2809         hotkey_poll_setup(true);
2810 #endif
2811
2812         mutex_unlock(&hotkey_mutex);
2813
2814         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2815
2816         return (res) ? res : count;
2817 }
2818
2819 static DEVICE_ATTR_RW(hotkey_mask);
2820
2821 /* sysfs hotkey bios_enabled ------------------------------------------- */
2822 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2823                            struct device_attribute *attr,
2824                            char *buf)
2825 {
2826         return sprintf(buf, "0\n");
2827 }
2828
2829 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2830
2831 /* sysfs hotkey bios_mask ---------------------------------------------- */
2832 static ssize_t hotkey_bios_mask_show(struct device *dev,
2833                            struct device_attribute *attr,
2834                            char *buf)
2835 {
2836         printk_deprecated_attribute("hotkey_bios_mask",
2837                         "This attribute is useless.");
2838         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2839 }
2840
2841 static DEVICE_ATTR_RO(hotkey_bios_mask);
2842
2843 /* sysfs hotkey all_mask ----------------------------------------------- */
2844 static ssize_t hotkey_all_mask_show(struct device *dev,
2845                            struct device_attribute *attr,
2846                            char *buf)
2847 {
2848         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2849                                 hotkey_all_mask | hotkey_source_mask);
2850 }
2851
2852 static DEVICE_ATTR_RO(hotkey_all_mask);
2853
2854 /* sysfs hotkey all_mask ----------------------------------------------- */
2855 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2856                            struct device_attribute *attr,
2857                            char *buf)
2858 {
2859         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2860                         hotkey_adaptive_all_mask | hotkey_source_mask);
2861 }
2862
2863 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2864
2865 /* sysfs hotkey recommended_mask --------------------------------------- */
2866 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2867                                             struct device_attribute *attr,
2868                                             char *buf)
2869 {
2870         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2871                         (hotkey_all_mask | hotkey_source_mask)
2872                         & ~hotkey_reserved_mask);
2873 }
2874
2875 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2876
2877 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2878
2879 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2880 static ssize_t hotkey_source_mask_show(struct device *dev,
2881                            struct device_attribute *attr,
2882                            char *buf)
2883 {
2884         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2885 }
2886
2887 static ssize_t hotkey_source_mask_store(struct device *dev,
2888                             struct device_attribute *attr,
2889                             const char *buf, size_t count)
2890 {
2891         unsigned long t;
2892         u32 r_ev;
2893         int rc;
2894
2895         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2896                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2897                 return -EINVAL;
2898
2899         if (mutex_lock_killable(&hotkey_mutex))
2900                 return -ERESTARTSYS;
2901
2902         HOTKEY_CONFIG_CRITICAL_START
2903         hotkey_source_mask = t;
2904         HOTKEY_CONFIG_CRITICAL_END
2905
2906         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2907                         ~hotkey_source_mask);
2908         hotkey_poll_setup(true);
2909
2910         /* check if events needed by the driver got disabled */
2911         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2912                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2913
2914         mutex_unlock(&hotkey_mutex);
2915
2916         if (rc < 0)
2917                 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2918
2919         if (r_ev)
2920                 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2921                           r_ev);
2922
2923         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2924
2925         return (rc < 0) ? rc : count;
2926 }
2927
2928 static DEVICE_ATTR_RW(hotkey_source_mask);
2929
2930 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2931 static ssize_t hotkey_poll_freq_show(struct device *dev,
2932                            struct device_attribute *attr,
2933                            char *buf)
2934 {
2935         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2936 }
2937
2938 static ssize_t hotkey_poll_freq_store(struct device *dev,
2939                             struct device_attribute *attr,
2940                             const char *buf, size_t count)
2941 {
2942         unsigned long t;
2943
2944         if (parse_strtoul(buf, 25, &t))
2945                 return -EINVAL;
2946
2947         if (mutex_lock_killable(&hotkey_mutex))
2948                 return -ERESTARTSYS;
2949
2950         hotkey_poll_set_freq(t);
2951         hotkey_poll_setup(true);
2952
2953         mutex_unlock(&hotkey_mutex);
2954
2955         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2956
2957         return count;
2958 }
2959
2960 static DEVICE_ATTR_RW(hotkey_poll_freq);
2961
2962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2963
2964 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2965 static ssize_t hotkey_radio_sw_show(struct device *dev,
2966                            struct device_attribute *attr,
2967                            char *buf)
2968 {
2969         int res;
2970         res = hotkey_get_wlsw();
2971         if (res < 0)
2972                 return res;
2973
2974         /* Opportunistic update */
2975         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2976
2977         return snprintf(buf, PAGE_SIZE, "%d\n",
2978                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2979 }
2980
2981 static DEVICE_ATTR_RO(hotkey_radio_sw);
2982
2983 static void hotkey_radio_sw_notify_change(void)
2984 {
2985         if (tp_features.hotkey_wlsw)
2986                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2987                              "hotkey_radio_sw");
2988 }
2989
2990 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2991 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2992                            struct device_attribute *attr,
2993                            char *buf)
2994 {
2995         int res, s;
2996         res = hotkey_get_tablet_mode(&s);
2997         if (res < 0)
2998                 return res;
2999
3000         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
3001 }
3002
3003 static DEVICE_ATTR_RO(hotkey_tablet_mode);
3004
3005 static void hotkey_tablet_mode_notify_change(void)
3006 {
3007         if (tp_features.hotkey_tablet)
3008                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3009                              "hotkey_tablet_mode");
3010 }
3011
3012 /* sysfs wakeup reason (pollable) -------------------------------------- */
3013 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
3014                            struct device_attribute *attr,
3015                            char *buf)
3016 {
3017         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
3018 }
3019
3020 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
3021
3022 static void hotkey_wakeup_reason_notify_change(void)
3023 {
3024         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3025                      "wakeup_reason");
3026 }
3027
3028 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
3029 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
3030                            struct device_attribute *attr,
3031                            char *buf)
3032 {
3033         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
3034 }
3035
3036 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
3037                    hotkey_wakeup_hotunplug_complete_show, NULL);
3038
3039 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
3040 {
3041         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
3042                      "wakeup_hotunplug_complete");
3043 }
3044
3045 /* sysfs adaptive kbd mode --------------------------------------------- */
3046
3047 static int adaptive_keyboard_get_mode(void);
3048 static int adaptive_keyboard_set_mode(int new_mode);
3049
3050 enum ADAPTIVE_KEY_MODE {
3051         HOME_MODE,
3052         WEB_BROWSER_MODE,
3053         WEB_CONFERENCE_MODE,
3054         FUNCTION_MODE,
3055         LAYFLAT_MODE
3056 };
3057
3058 static ssize_t adaptive_kbd_mode_show(struct device *dev,
3059                            struct device_attribute *attr,
3060                            char *buf)
3061 {
3062         int current_mode;
3063
3064         current_mode = adaptive_keyboard_get_mode();
3065         if (current_mode < 0)
3066                 return current_mode;
3067
3068         return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
3069 }
3070
3071 static ssize_t adaptive_kbd_mode_store(struct device *dev,
3072                             struct device_attribute *attr,
3073                             const char *buf, size_t count)
3074 {
3075         unsigned long t;
3076         int res;
3077
3078         if (parse_strtoul(buf, LAYFLAT_MODE, &t))
3079                 return -EINVAL;
3080
3081         res = adaptive_keyboard_set_mode(t);
3082         return (res < 0) ? res : count;
3083 }
3084
3085 static DEVICE_ATTR_RW(adaptive_kbd_mode);
3086
3087 static struct attribute *adaptive_kbd_attributes[] = {
3088         &dev_attr_adaptive_kbd_mode.attr,
3089         NULL
3090 };
3091
3092 static const struct attribute_group adaptive_kbd_attr_group = {
3093         .attrs = adaptive_kbd_attributes,
3094 };
3095
3096 /* --------------------------------------------------------------------- */
3097
3098 static struct attribute *hotkey_attributes[] __initdata = {
3099         &dev_attr_hotkey_enable.attr,
3100         &dev_attr_hotkey_bios_enabled.attr,
3101         &dev_attr_hotkey_bios_mask.attr,
3102         &dev_attr_wakeup_reason.attr,
3103         &dev_attr_wakeup_hotunplug_complete.attr,
3104         &dev_attr_hotkey_mask.attr,
3105         &dev_attr_hotkey_all_mask.attr,
3106         &dev_attr_hotkey_adaptive_all_mask.attr,
3107         &dev_attr_hotkey_recommended_mask.attr,
3108 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3109         &dev_attr_hotkey_source_mask.attr,
3110         &dev_attr_hotkey_poll_freq.attr,
3111 #endif
3112 };
3113
3114 /*
3115  * Sync both the hw and sw blocking state of all switches
3116  */
3117 static void tpacpi_send_radiosw_update(void)
3118 {
3119         int wlsw;
3120
3121         /*
3122          * We must sync all rfkill controllers *before* issuing any
3123          * rfkill input events, or we will race the rfkill core input
3124          * handler.
3125          *
3126          * tpacpi_inputdev_send_mutex works as a synchronization point
3127          * for the above.
3128          *
3129          * We optimize to avoid numerous calls to hotkey_get_wlsw.
3130          */
3131
3132         wlsw = hotkey_get_wlsw();
3133
3134         /* Sync hw blocking state first if it is hw-blocked */
3135         if (wlsw == TPACPI_RFK_RADIO_OFF)
3136                 tpacpi_rfk_update_hwblock_state(true);
3137
3138         /* Sync sw blocking state */
3139         tpacpi_rfk_update_swstate_all();
3140
3141         /* Sync hw blocking state last if it is hw-unblocked */
3142         if (wlsw == TPACPI_RFK_RADIO_ON)
3143                 tpacpi_rfk_update_hwblock_state(false);
3144
3145         /* Issue rfkill input event for WLSW switch */
3146         if (!(wlsw < 0)) {
3147                 mutex_lock(&tpacpi_inputdev_send_mutex);
3148
3149                 input_report_switch(tpacpi_inputdev,
3150                                     SW_RFKILL_ALL, (wlsw > 0));
3151                 input_sync(tpacpi_inputdev);
3152
3153                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3154         }
3155
3156         /*
3157          * this can be unconditional, as we will poll state again
3158          * if userspace uses the notify to read data
3159          */
3160         hotkey_radio_sw_notify_change();
3161 }
3162
3163 static void hotkey_exit(void)
3164 {
3165 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3166         mutex_lock(&hotkey_mutex);
3167         hotkey_poll_stop_sync();
3168         mutex_unlock(&hotkey_mutex);
3169 #endif
3170
3171         if (hotkey_dev_attributes)
3172                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3173
3174         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3175                    "restoring original HKEY status and mask\n");
3176         /* yes, there is a bitwise or below, we want the
3177          * functions to be called even if one of them fail */
3178         if (((tp_features.hotkey_mask &&
3179               hotkey_mask_set(hotkey_orig_mask)) |
3180              hotkey_status_set(false)) != 0)
3181                 pr_err("failed to restore hot key mask to BIOS defaults\n");
3182 }
3183
3184 static void __init hotkey_unmap(const unsigned int scancode)
3185 {
3186         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3187                 clear_bit(hotkey_keycode_map[scancode],
3188                           tpacpi_inputdev->keybit);
3189                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3190         }
3191 }
3192
3193 /*
3194  * HKEY quirks:
3195  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3196  */
3197
3198 #define TPACPI_HK_Q_INIMASK     0x0001
3199
3200 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3201         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3202         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3203         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3204         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3205         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3206         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3207         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3208         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3209         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3210         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3211         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3212         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3213         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3214         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3215         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3216         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3217         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3218         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3219         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3220 };
3221
3222 typedef u16 tpacpi_keymap_entry_t;
3223 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3224
3225 static int hotkey_init_tablet_mode(void)
3226 {
3227         int in_tablet_mode = 0, res;
3228         char *type = NULL;
3229
3230         if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3231                 int has_tablet_mode;
3232
3233                 in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3234                                                              &has_tablet_mode);
3235                 if (has_tablet_mode)
3236                         tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3237                 type = "GMMS";
3238         } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3239                 /* For X41t, X60t, X61t Tablets... */
3240                 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3241                 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3242                 type = "MHKG";
3243         }
3244
3245         if (!tp_features.hotkey_tablet)
3246                 return 0;
3247
3248         pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3249                 type, in_tablet_mode ? "tablet" : "laptop");
3250
3251         res = add_to_attr_set(hotkey_dev_attributes,
3252                               &dev_attr_hotkey_tablet_mode.attr);
3253         if (res)
3254                 return -1;
3255
3256         return in_tablet_mode;
3257 }
3258
3259 static int __init hotkey_init(struct ibm_init_struct *iibm)
3260 {
3261         /* Requirements for changing the default keymaps:
3262          *
3263          * 1. Many of the keys are mapped to KEY_RESERVED for very
3264          *    good reasons.  Do not change them unless you have deep
3265          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3266          *    the various ThinkPad models.  The driver behaves
3267          *    differently for KEY_RESERVED: such keys have their
3268          *    hot key mask *unset* in mask_recommended, and also
3269          *    in the initial hot key mask programmed into the
3270          *    firmware at driver load time, which means the firm-
3271          *    ware may react very differently if you change them to
3272          *    something else;
3273          *
3274          * 2. You must be subscribed to the linux-thinkpad and
3275          *    ibm-acpi-devel mailing lists, and you should read the
3276          *    list archives since 2007 if you want to change the
3277          *    keymaps.  This requirement exists so that you will
3278          *    know the past history of problems with the thinkpad-
3279          *    acpi driver keymaps, and also that you will be
3280          *    listening to any bug reports;
3281          *
3282          * 3. Do not send thinkpad-acpi specific patches directly to
3283          *    for merging, *ever*.  Send them to the linux-acpi
3284          *    mailinglist for comments.  Merging is to be done only
3285          *    through acpi-test and the ACPI maintainer.
3286          *
3287          * If the above is too much to ask, don't change the keymap.
3288          * Ask the thinkpad-acpi maintainer to do it, instead.
3289          */
3290
3291         enum keymap_index {
3292                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3293                 TPACPI_KEYMAP_LENOVO_GENERIC,
3294         };
3295
3296         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3297         /* Generic keymap for IBM ThinkPads */
3298         [TPACPI_KEYMAP_IBM_GENERIC] = {
3299                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3300                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3301                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3302                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3303
3304                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3305                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3306                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3307                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3308
3309                 /* brightness: firmware always reacts to them */
3310                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3311                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3312
3313                 /* Thinklight: firmware always react to it */
3314                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3315
3316                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3317                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3318
3319                 /* Volume: firmware always react to it and reprograms
3320                  * the built-in *extra* mixer.  Never map it to control
3321                  * another mixer by default. */
3322                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3323                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3324                 KEY_RESERVED,   /* 0x16: MUTE */
3325
3326                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3327
3328                 /* (assignments unknown, please report if found) */
3329                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3330                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3331
3332                 /* No assignments, only used for Adaptive keyboards. */
3333                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3338
3339                 /* No assignment, used for newer Lenovo models */
3340                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3341                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3342                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3343                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3344                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3345                 KEY_UNKNOWN, KEY_UNKNOWN
3346
3347                 },
3348
3349         /* Generic keymap for Lenovo ThinkPads */
3350         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3351                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3352                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3353                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3354                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3355
3356                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3357                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3358                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3359                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3360
3361                 /* These should be enabled --only-- when ACPI video
3362                  * is disabled (i.e. in "vendor" mode), and are handled
3363                  * in a special way by the init code */
3364                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3365                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3366
3367                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3368
3369                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3370                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3371
3372                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3373                  * react to it and reprograms the built-in *extra* mixer.
3374                  * Never map it to control another mixer by default.
3375                  *
3376                  * T60?, T61, R60?, R61: firmware and EC tries to send
3377                  * these over the regular keyboard, so these are no-ops,
3378                  * but there are still weird bugs re. MUTE, so do not
3379                  * change unless you get test reports from all Lenovo
3380                  * models.  May cause the BIOS to interfere with the
3381                  * HDA mixer.
3382                  */
3383                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3384                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3385                 KEY_RESERVED,   /* 0x16: MUTE */
3386
3387                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3388
3389                 /* (assignments unknown, please report if found) */
3390                 KEY_UNKNOWN, KEY_UNKNOWN,
3391
3392                 /*
3393                  * The mic mute button only sends 0x1a.  It does not
3394                  * automatically mute the mic or change the mute light.
3395                  */
3396                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3397
3398                 /* (assignments unknown, please report if found) */
3399                 KEY_UNKNOWN,
3400
3401                 /* Extra keys in use since the X240 / T440 / T540 */
3402                 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3403
3404                 /*
3405                  * These are the adaptive keyboard keycodes for Carbon X1 2014.
3406                  * The first item in this list is the Mute button which is
3407                  * emitted with 0x103 through
3408                  * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3409                  * symbol is held.
3410                  * We'll need to offset those by 0x20.
3411                  */
3412                 KEY_RESERVED,        /* Mute held, 0x103 */
3413                 KEY_BRIGHTNESS_MIN,  /* Backlight off */
3414                 KEY_RESERVED,        /* Clipping tool */
3415                 KEY_RESERVED,        /* Cloud */
3416                 KEY_RESERVED,
3417                 KEY_VOICECOMMAND,    /* Voice */
3418                 KEY_RESERVED,
3419                 KEY_RESERVED,        /* Gestures */
3420                 KEY_RESERVED,
3421                 KEY_RESERVED,
3422                 KEY_RESERVED,
3423                 KEY_CONFIG,          /* Settings */
3424                 KEY_RESERVED,        /* New tab */
3425                 KEY_REFRESH,         /* Reload */
3426                 KEY_BACK,            /* Back */
3427                 KEY_RESERVED,        /* Microphone down */
3428                 KEY_RESERVED,        /* Microphone up */
3429                 KEY_RESERVED,        /* Microphone cancellation */
3430                 KEY_RESERVED,        /* Camera mode */
3431                 KEY_RESERVED,        /* Rotate display, 0x116 */
3432
3433                 /*
3434                  * These are found in 2017 models (e.g. T470s, X270).
3435                  * The lowest known value is 0x311, which according to
3436                  * the manual should launch a user defined favorite
3437                  * application.
3438                  *
3439                  * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3440                  * corresponding to 0x34.
3441                  */
3442
3443                 /* (assignments unknown, please report if found) */
3444                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3445                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3446                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3447                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3448                 KEY_UNKNOWN,
3449
3450                 KEY_BOOKMARKS,       /* Favorite app, 0x311 */
3451                 KEY_RESERVED,        /* Clipping tool */
3452                 KEY_CALC,            /* Calculator (above numpad, P52) */
3453                 KEY_BLUETOOTH,       /* Bluetooth */
3454                 KEY_KEYBOARD         /* Keyboard, 0x315 */
3455                 },
3456         };
3457
3458         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3459                 /* Generic maps (fallback) */
3460                 {
3461                   .vendor = PCI_VENDOR_ID_IBM,
3462                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3463                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3464                 },
3465                 {
3466                   .vendor = PCI_VENDOR_ID_LENOVO,
3467                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3468                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3469                 },
3470         };
3471
3472 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3473 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3474
3475         int res, i;
3476         int status;
3477         int hkeyv;
3478         bool radiosw_state  = false;
3479         bool tabletsw_state = false;
3480
3481         unsigned long quirks;
3482         unsigned long keymap_id;
3483
3484         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3485                         "initializing hotkey subdriver\n");
3486
3487         BUG_ON(!tpacpi_inputdev);
3488         BUG_ON(tpacpi_inputdev->open != NULL ||
3489                tpacpi_inputdev->close != NULL);
3490
3491         TPACPI_ACPIHANDLE_INIT(hkey);
3492         mutex_init(&hotkey_mutex);
3493
3494 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3495         mutex_init(&hotkey_thread_data_mutex);
3496 #endif
3497
3498         /* hotkey not supported on 570 */
3499         tp_features.hotkey = hkey_handle != NULL;
3500
3501         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3502                 "hotkeys are %s\n",
3503                 str_supported(tp_features.hotkey));
3504
3505         if (!tp_features.hotkey)
3506                 return 1;
3507
3508         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3509                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3510
3511         tpacpi_disable_brightness_delay();
3512
3513         /* MUST have enough space for all attributes to be added to
3514          * hotkey_dev_attributes */
3515         hotkey_dev_attributes = create_attr_set(
3516                                         ARRAY_SIZE(hotkey_attributes) + 2,
3517                                         NULL);
3518         if (!hotkey_dev_attributes)
3519                 return -ENOMEM;
3520         res = add_many_to_attr_set(hotkey_dev_attributes,
3521                         hotkey_attributes,
3522                         ARRAY_SIZE(hotkey_attributes));
3523         if (res)
3524                 goto err_exit;
3525
3526         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3527            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3528            for HKEY interface version 0x100 */
3529         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3530                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3531                             "firmware HKEY interface version: 0x%x\n",
3532                             hkeyv);
3533
3534                 switch (hkeyv >> 8) {
3535                 case 1:
3536                         /*
3537                          * MHKV 0x100 in A31, R40, R40e,
3538                          * T4x, X31, and later
3539                          */
3540
3541                         /* Paranoia check AND init hotkey_all_mask */
3542                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3543                                         "MHKA", "qd")) {
3544                                 pr_err("missing MHKA handler, please report this to %s\n",
3545                                        TPACPI_MAIL);
3546                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3547                                 hotkey_all_mask = 0x080cU;
3548                         } else {
3549                                 tp_features.hotkey_mask = 1;
3550                         }
3551                         break;
3552
3553                 case 2:
3554                         /*
3555                          * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3556                          */
3557
3558                         /* Paranoia check AND init hotkey_all_mask */
3559                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3560                                         "MHKA", "dd", 1)) {
3561                                 pr_err("missing MHKA handler, please report this to %s\n",
3562                                        TPACPI_MAIL);
3563                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3564                                 hotkey_all_mask = 0x080cU;
3565                         } else {
3566                                 tp_features.hotkey_mask = 1;
3567                         }
3568
3569                         /*
3570                          * Check if we have an adaptive keyboard, like on the
3571                          * Lenovo Carbon X1 2014 (2nd Gen).
3572                          */
3573                         if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3574                                        "MHKA", "dd", 2)) {
3575                                 if (hotkey_adaptive_all_mask != 0) {
3576                                         tp_features.has_adaptive_kbd = true;
3577                                         res = sysfs_create_group(
3578                                                 &tpacpi_pdev->dev.kobj,
3579                                                 &adaptive_kbd_attr_group);
3580                                         if (res)
3581                                                 goto err_exit;
3582                                 }
3583                         } else {
3584                                 tp_features.has_adaptive_kbd = false;
3585                                 hotkey_adaptive_all_mask = 0x0U;
3586                         }
3587                         break;
3588
3589                 default:
3590                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3591                                hkeyv);
3592                         pr_err("please report this to %s\n", TPACPI_MAIL);
3593                         break;
3594                 }
3595         }
3596
3597         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3598                 "hotkey masks are %s\n",
3599                 str_supported(tp_features.hotkey_mask));
3600
3601         /* Init hotkey_all_mask if not initialized yet */
3602         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3603             (quirks & TPACPI_HK_Q_INIMASK))
3604                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3605
3606         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3607         if (tp_features.hotkey_mask) {
3608                 /* hotkey_source_mask *must* be zero for
3609                  * the first hotkey_mask_get to return hotkey_orig_mask */
3610                 res = hotkey_mask_get();
3611                 if (res)
3612                         goto err_exit;
3613
3614                 hotkey_orig_mask = hotkey_acpi_mask;
3615         } else {
3616                 hotkey_orig_mask = hotkey_all_mask;
3617                 hotkey_acpi_mask = hotkey_all_mask;
3618         }
3619
3620 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3621         if (dbg_wlswemul) {
3622                 tp_features.hotkey_wlsw = 1;
3623                 radiosw_state = !!tpacpi_wlsw_emulstate;
3624                 pr_info("radio switch emulation enabled\n");
3625         } else
3626 #endif
3627         /* Not all thinkpads have a hardware radio switch */
3628         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3629                 tp_features.hotkey_wlsw = 1;
3630                 radiosw_state = !!status;
3631                 pr_info("radio switch found; radios are %s\n",
3632                         enabled(status, 0));
3633         }
3634         if (tp_features.hotkey_wlsw)
3635                 res = add_to_attr_set(hotkey_dev_attributes,
3636                                 &dev_attr_hotkey_radio_sw.attr);
3637
3638         res = hotkey_init_tablet_mode();
3639         if (res < 0)
3640                 goto err_exit;
3641
3642         tabletsw_state = res;
3643
3644         res = register_attr_set_with_sysfs(hotkey_dev_attributes,
3645                                            &tpacpi_pdev->dev.kobj);
3646         if (res)
3647                 goto err_exit;
3648
3649         /* Set up key map */
3650         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3651                                         GFP_KERNEL);
3652         if (!hotkey_keycode_map) {
3653                 pr_err("failed to allocate memory for key map\n");
3654                 res = -ENOMEM;
3655                 goto err_exit;
3656         }
3657
3658         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3659                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3660         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3661         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3662                    "using keymap number %lu\n", keymap_id);
3663
3664         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3665                 TPACPI_HOTKEY_MAP_SIZE);
3666
3667         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3668         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3669         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3670         tpacpi_inputdev->keycode = hotkey_keycode_map;
3671         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3672                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3673                         input_set_capability(tpacpi_inputdev, EV_KEY,
3674                                                 hotkey_keycode_map[i]);
3675                 } else {
3676                         if (i < sizeof(hotkey_reserved_mask)*8)
3677                                 hotkey_reserved_mask |= 1 << i;
3678                 }
3679         }
3680
3681         if (tp_features.hotkey_wlsw) {
3682                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3683                 input_report_switch(tpacpi_inputdev,
3684                                     SW_RFKILL_ALL, radiosw_state);
3685         }
3686         if (tp_features.hotkey_tablet) {
3687                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3688                 input_report_switch(tpacpi_inputdev,
3689                                     SW_TABLET_MODE, tabletsw_state);
3690         }
3691
3692         /* Do not issue duplicate brightness change events to
3693          * userspace. tpacpi_detect_brightness_capabilities() must have
3694          * been called before this point  */
3695         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3696                 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3697                 pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3698
3699                 /* Disable brightness up/down on Lenovo thinkpads when
3700                  * ACPI is handling them, otherwise it is plain impossible
3701                  * for userspace to do something even remotely sane */
3702                 hotkey_reserved_mask |=
3703                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3704                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3705                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3706                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3707         }
3708
3709 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3710         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3711                                 & ~hotkey_all_mask
3712                                 & ~hotkey_reserved_mask;
3713
3714         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3715                     "hotkey source mask 0x%08x, polling freq %u\n",
3716                     hotkey_source_mask, hotkey_poll_freq);
3717 #endif
3718
3719         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3720                         "enabling firmware HKEY event interface...\n");
3721         res = hotkey_status_set(true);
3722         if (res) {
3723                 hotkey_exit();
3724                 return res;
3725         }
3726         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3727                                | hotkey_driver_mask)
3728                               & ~hotkey_source_mask);
3729         if (res < 0 && res != -ENXIO) {
3730                 hotkey_exit();
3731                 return res;
3732         }
3733         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3734                                 & ~hotkey_reserved_mask;
3735         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3736                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3737                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3738
3739         tpacpi_inputdev->open = &hotkey_inputdev_open;
3740         tpacpi_inputdev->close = &hotkey_inputdev_close;
3741
3742         hotkey_poll_setup_safe(true);
3743
3744         return 0;
3745
3746 err_exit:
3747         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3748         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3749                         &adaptive_kbd_attr_group);
3750
3751         hotkey_dev_attributes = NULL;
3752
3753         return (res < 0) ? res : 1;
3754 }
3755
3756 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3757  * mode, Web conference mode, Function mode and Lay-flat mode.
3758  * We support Home mode and Function mode currently.
3759  *
3760  * Will consider support rest of modes in future.
3761  *
3762  */
3763 static const int adaptive_keyboard_modes[] = {
3764         HOME_MODE,
3765 /*      WEB_BROWSER_MODE = 2,
3766         WEB_CONFERENCE_MODE = 3, */
3767         FUNCTION_MODE
3768 };
3769
3770 #define DFR_CHANGE_ROW                  0x101
3771 #define DFR_SHOW_QUICKVIEW_ROW          0x102
3772 #define FIRST_ADAPTIVE_KEY              0x103
3773
3774 /* press Fn key a while second, it will switch to Function Mode. Then
3775  * release Fn key, previous mode be restored.
3776  */
3777 static bool adaptive_keyboard_mode_is_saved;
3778 static int adaptive_keyboard_prev_mode;
3779
3780 static int adaptive_keyboard_get_mode(void)
3781 {
3782         int mode = 0;
3783
3784         if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3785                 pr_err("Cannot read adaptive keyboard mode\n");
3786                 return -EIO;
3787         }
3788
3789         return mode;
3790 }
3791
3792 static int adaptive_keyboard_set_mode(int new_mode)
3793 {
3794         if (new_mode < 0 ||
3795                 new_mode > LAYFLAT_MODE)
3796                 return -EINVAL;
3797
3798         if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3799                 pr_err("Cannot set adaptive keyboard mode\n");
3800                 return -EIO;
3801         }
3802
3803         return 0;
3804 }
3805
3806 static int adaptive_keyboard_get_next_mode(int mode)
3807 {
3808         size_t i;
3809         size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3810
3811         for (i = 0; i <= max_mode; i++) {
3812                 if (adaptive_keyboard_modes[i] == mode)
3813                         break;
3814         }
3815
3816         if (i >= max_mode)
3817                 i = 0;
3818         else
3819                 i++;
3820
3821         return adaptive_keyboard_modes[i];
3822 }
3823
3824 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3825 {
3826         int current_mode = 0;
3827         int new_mode = 0;
3828         int keycode;
3829
3830         switch (scancode) {
3831         case DFR_CHANGE_ROW:
3832                 if (adaptive_keyboard_mode_is_saved) {
3833                         new_mode = adaptive_keyboard_prev_mode;
3834                         adaptive_keyboard_mode_is_saved = false;
3835                 } else {
3836                         current_mode = adaptive_keyboard_get_mode();
3837                         if (current_mode < 0)
3838                                 return false;
3839                         new_mode = adaptive_keyboard_get_next_mode(
3840                                         current_mode);
3841                 }
3842
3843                 if (adaptive_keyboard_set_mode(new_mode) < 0)
3844                         return false;
3845
3846                 return true;
3847
3848         case DFR_SHOW_QUICKVIEW_ROW:
3849                 current_mode = adaptive_keyboard_get_mode();
3850                 if (current_mode < 0)
3851                         return false;
3852
3853                 adaptive_keyboard_prev_mode = current_mode;
3854                 adaptive_keyboard_mode_is_saved = true;
3855
3856                 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3857                         return false;
3858                 return true;
3859
3860         default:
3861                 if (scancode < FIRST_ADAPTIVE_KEY ||
3862                     scancode >= FIRST_ADAPTIVE_KEY +
3863                     TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3864                     TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3865                         pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3866                                 scancode);
3867                         return false;
3868                 }
3869                 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3870                                              TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3871                 if (keycode != KEY_RESERVED) {
3872                         mutex_lock(&tpacpi_inputdev_send_mutex);
3873
3874                         input_report_key(tpacpi_inputdev, keycode, 1);
3875                         input_sync(tpacpi_inputdev);
3876
3877                         input_report_key(tpacpi_inputdev, keycode, 0);
3878                         input_sync(tpacpi_inputdev);
3879
3880                         mutex_unlock(&tpacpi_inputdev_send_mutex);
3881                 }
3882                 return true;
3883         }
3884 }
3885
3886 static bool hotkey_notify_hotkey(const u32 hkey,
3887                                  bool *send_acpi_ev,
3888                                  bool *ignore_acpi_ev)
3889 {
3890         /* 0x1000-0x1FFF: key presses */
3891         unsigned int scancode = hkey & 0xfff;
3892         *send_acpi_ev = true;
3893         *ignore_acpi_ev = false;
3894
3895         /*
3896          * Original events are in the 0x10XX range, the adaptive keyboard
3897          * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3898          * models, additional keys are emitted through 0x13XX.
3899          */
3900         switch ((hkey >> 8) & 0xf) {
3901         case 0:
3902                 if (scancode > 0 &&
3903                     scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3904                         /* HKEY event 0x1001 is scancode 0x00 */
3905                         scancode--;
3906                         if (!(hotkey_source_mask & (1 << scancode))) {
3907                                 tpacpi_input_send_key_masked(scancode);
3908                                 *send_acpi_ev = false;
3909                         } else {
3910                                 *ignore_acpi_ev = true;
3911                         }
3912                         return true;
3913                 }
3914                 break;
3915
3916         case 1:
3917                 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3918
3919         case 3:
3920                 /* Extended keycodes start at 0x300 and our offset into the map
3921                  * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3922                  * will be positive, but might not be in the correct range.
3923                  */
3924                 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3925                 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3926                     scancode < TPACPI_HOTKEY_MAP_LEN) {
3927                         tpacpi_input_send_key(scancode);
3928                         return true;
3929                 }
3930                 break;
3931         }
3932
3933         return false;
3934 }
3935
3936 static bool hotkey_notify_wakeup(const u32 hkey,
3937                                  bool *send_acpi_ev,
3938                                  bool *ignore_acpi_ev)
3939 {
3940         /* 0x2000-0x2FFF: Wakeup reason */
3941         *send_acpi_ev = true;
3942         *ignore_acpi_ev = false;
3943
3944         switch (hkey) {
3945         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3946         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3947                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3948                 *ignore_acpi_ev = true;
3949                 break;
3950
3951         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3952         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3953                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3954                 *ignore_acpi_ev = true;
3955                 break;
3956
3957         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3958         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3959                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3960                 /* how to auto-heal: */
3961                 /* 2313: woke up from S3, go to S4/S5 */
3962                 /* 2413: woke up from S4, go to S5 */
3963                 break;
3964
3965         default:
3966                 return false;
3967         }
3968
3969         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3970                 pr_info("woke up due to a hot-unplug request...\n");
3971                 hotkey_wakeup_reason_notify_change();
3972         }
3973         return true;
3974 }
3975
3976 static bool hotkey_notify_dockevent(const u32 hkey,
3977                                  bool *send_acpi_ev,
3978                                  bool *ignore_acpi_ev)
3979 {
3980         /* 0x4000-0x4FFF: dock-related events */
3981         *send_acpi_ev = true;
3982         *ignore_acpi_ev = false;
3983
3984         switch (hkey) {
3985         case TP_HKEY_EV_UNDOCK_ACK:
3986                 /* ACPI undock operation completed after wakeup */
3987                 hotkey_autosleep_ack = 1;
3988                 pr_info("undocked\n");
3989                 hotkey_wakeup_hotunplug_complete_notify_change();
3990                 return true;
3991
3992         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3993                 pr_info("docked into hotplug port replicator\n");
3994                 return true;
3995         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3996                 pr_info("undocked from hotplug port replicator\n");
3997                 return true;
3998
3999         default:
4000                 return false;
4001         }
4002 }
4003
4004 static bool hotkey_notify_usrevent(const u32 hkey,
4005                                  bool *send_acpi_ev,
4006                                  bool *ignore_acpi_ev)
4007 {
4008         /* 0x5000-0x5FFF: human interface helpers */
4009         *send_acpi_ev = true;
4010         *ignore_acpi_ev = false;
4011
4012         switch (hkey) {
4013         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
4014         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
4015                 return true;
4016
4017         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
4018         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
4019                 tpacpi_input_send_tabletsw();
4020                 hotkey_tablet_mode_notify_change();
4021                 *send_acpi_ev = false;
4022                 return true;
4023
4024         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
4025         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
4026         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
4027                 /* do not propagate these events */
4028                 *ignore_acpi_ev = true;
4029                 return true;
4030
4031         default:
4032                 return false;
4033         }
4034 }
4035
4036 static void thermal_dump_all_sensors(void);
4037
4038 static bool hotkey_notify_6xxx(const u32 hkey,
4039                                  bool *send_acpi_ev,
4040                                  bool *ignore_acpi_ev)
4041 {
4042         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
4043         *send_acpi_ev = true;
4044         *ignore_acpi_ev = false;
4045
4046         switch (hkey) {
4047         case TP_HKEY_EV_THM_TABLE_CHANGED:
4048                 pr_debug("EC reports: Thermal Table has changed\n");
4049                 /* recommended action: do nothing, we don't have
4050                  * Lenovo ATM information */
4051                 return true;
4052         case TP_HKEY_EV_THM_CSM_COMPLETED:
4053                 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
4054                 /* recommended action: do nothing, we don't have
4055                  * Lenovo ATM information */
4056                 return true;
4057         case TP_HKEY_EV_THM_TRANSFM_CHANGED:
4058                 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
4059                 /* recommended action: do nothing, we don't have
4060                  * Lenovo ATM information */
4061                 return true;
4062         case TP_HKEY_EV_ALARM_BAT_HOT:
4063                 pr_crit("THERMAL ALARM: battery is too hot!\n");
4064                 /* recommended action: warn user through gui */
4065                 break;
4066         case TP_HKEY_EV_ALARM_BAT_XHOT:
4067                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
4068                 /* recommended action: immediate sleep/hibernate */
4069                 break;
4070         case TP_HKEY_EV_ALARM_SENSOR_HOT:
4071                 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
4072                 /* recommended action: warn user through gui, that */
4073                 /* some internal component is too hot */
4074                 break;
4075         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
4076                 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
4077                 /* recommended action: immediate sleep/hibernate */
4078                 break;
4079         case TP_HKEY_EV_AC_CHANGED:
4080                 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
4081                  * AC status changed; can be triggered by plugging or
4082                  * unplugging AC adapter, docking or undocking. */
4083
4084                 /* fallthrough */
4085
4086         case TP_HKEY_EV_KEY_NUMLOCK:
4087         case TP_HKEY_EV_KEY_FN:
4088         case TP_HKEY_EV_KEY_FN_ESC:
4089                 /* key press events, we just ignore them as long as the EC
4090                  * is still reporting them in the normal keyboard stream */
4091                 *send_acpi_ev = false;
4092                 *ignore_acpi_ev = true;
4093                 return true;
4094
4095         case TP_HKEY_EV_TABLET_CHANGED:
4096                 tpacpi_input_send_tabletsw();
4097                 hotkey_tablet_mode_notify_change();
4098                 *send_acpi_ev = false;
4099                 return true;
4100
4101         case TP_HKEY_EV_PALM_DETECTED:
4102         case TP_HKEY_EV_PALM_UNDETECTED:
4103                 /* palm detected hovering the keyboard, forward to user-space
4104                  * via netlink for consumption */
4105                 return true;
4106
4107         default:
4108                 /* report simply as unknown, no sensor dump */
4109                 return false;
4110         }
4111
4112         thermal_dump_all_sensors();
4113         return true;
4114 }
4115
4116 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4117 {
4118         u32 hkey;
4119         bool send_acpi_ev;
4120         bool ignore_acpi_ev;
4121         bool known_ev;
4122
4123         if (event != 0x80) {
4124                 pr_err("unknown HKEY notification event %d\n", event);
4125                 /* forward it to userspace, maybe it knows how to handle it */
4126                 acpi_bus_generate_netlink_event(
4127                                         ibm->acpi->device->pnp.device_class,
4128                                         dev_name(&ibm->acpi->device->dev),
4129                                         event, 0);
4130                 return;
4131         }
4132
4133         while (1) {
4134                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4135                         pr_err("failed to retrieve HKEY event\n");
4136                         return;
4137                 }
4138
4139                 if (hkey == 0) {
4140                         /* queue empty */
4141                         return;
4142                 }
4143
4144                 send_acpi_ev = true;
4145                 ignore_acpi_ev = false;
4146
4147                 switch (hkey >> 12) {
4148                 case 1:
4149                         /* 0x1000-0x1FFF: key presses */
4150                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4151                                                  &ignore_acpi_ev);
4152                         break;
4153                 case 2:
4154                         /* 0x2000-0x2FFF: Wakeup reason */
4155                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4156                                                  &ignore_acpi_ev);
4157                         break;
4158                 case 3:
4159                         /* 0x3000-0x3FFF: bay-related wakeups */
4160                         switch (hkey) {
4161                         case TP_HKEY_EV_BAYEJ_ACK:
4162                                 hotkey_autosleep_ack = 1;
4163                                 pr_info("bay ejected\n");
4164                                 hotkey_wakeup_hotunplug_complete_notify_change();
4165                                 known_ev = true;
4166                                 break;
4167                         case TP_HKEY_EV_OPTDRV_EJ:
4168                                 /* FIXME: kick libata if SATA link offline */
4169                                 known_ev = true;
4170                                 break;
4171                         default:
4172                                 known_ev = false;
4173                         }
4174                         break;
4175                 case 4:
4176                         /* 0x4000-0x4FFF: dock-related events */
4177                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4178                                                 &ignore_acpi_ev);
4179                         break;
4180                 case 5:
4181                         /* 0x5000-0x5FFF: human interface helpers */
4182                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4183                                                  &ignore_acpi_ev);
4184                         break;
4185                 case 6:
4186                         /* 0x6000-0x6FFF: thermal alarms/notices and
4187                          *                keyboard events */
4188                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4189                                                  &ignore_acpi_ev);
4190                         break;
4191                 case 7:
4192                         /* 0x7000-0x7FFF: misc */
4193                         if (tp_features.hotkey_wlsw &&
4194                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4195                                 tpacpi_send_radiosw_update();
4196                                 send_acpi_ev = 0;
4197                                 known_ev = true;
4198                                 break;
4199                         }
4200                         /* fallthrough - to default */
4201                 default:
4202                         known_ev = false;
4203                 }
4204                 if (!known_ev) {
4205                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4206                         pr_notice("please report the conditions when this event happened to %s\n",
4207                                   TPACPI_MAIL);
4208                 }
4209
4210                 /* netlink events */
4211                 if (!ignore_acpi_ev && send_acpi_ev) {
4212                         acpi_bus_generate_netlink_event(
4213                                         ibm->acpi->device->pnp.device_class,
4214                                         dev_name(&ibm->acpi->device->dev),
4215                                         event, hkey);
4216                 }
4217         }
4218 }
4219
4220 static void hotkey_suspend(void)
4221 {
4222         /* Do these on suspend, we get the events on early resume! */
4223         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4224         hotkey_autosleep_ack = 0;
4225
4226         /* save previous mode of adaptive keyboard of X1 Carbon */
4227         if (tp_features.has_adaptive_kbd) {
4228                 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4229                                         "GTRW", "dd", 0)) {
4230                         pr_err("Cannot read adaptive keyboard mode.\n");
4231                 }
4232         }
4233 }
4234
4235 static void hotkey_resume(void)
4236 {
4237         tpacpi_disable_brightness_delay();
4238
4239         if (hotkey_status_set(true) < 0 ||
4240             hotkey_mask_set(hotkey_acpi_mask) < 0)
4241                 pr_err("error while attempting to reset the event firmware interface\n");
4242
4243         tpacpi_send_radiosw_update();
4244         hotkey_tablet_mode_notify_change();
4245         hotkey_wakeup_reason_notify_change();
4246         hotkey_wakeup_hotunplug_complete_notify_change();
4247         hotkey_poll_setup_safe(false);
4248
4249         /* restore previous mode of adapive keyboard of X1 Carbon */
4250         if (tp_features.has_adaptive_kbd) {
4251                 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4252                                         adaptive_keyboard_prev_mode)) {
4253                         pr_err("Cannot set adaptive keyboard mode.\n");
4254                 }
4255         }
4256 }
4257
4258 /* procfs -------------------------------------------------------------- */
4259 static int hotkey_read(struct seq_file *m)
4260 {
4261         int res, status;
4262
4263         if (!tp_features.hotkey) {
4264                 seq_printf(m, "status:\t\tnot supported\n");
4265                 return 0;
4266         }
4267
4268         if (mutex_lock_killable(&hotkey_mutex))
4269                 return -ERESTARTSYS;
4270         res = hotkey_status_get(&status);
4271         if (!res)
4272                 res = hotkey_mask_get();
4273         mutex_unlock(&hotkey_mutex);
4274         if (res)
4275                 return res;
4276
4277         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4278         if (hotkey_all_mask) {
4279                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4280                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4281         } else {
4282                 seq_printf(m, "mask:\t\tnot supported\n");
4283                 seq_printf(m, "commands:\tenable, disable, reset\n");
4284         }
4285
4286         return 0;
4287 }
4288
4289 static void hotkey_enabledisable_warn(bool enable)
4290 {
4291         tpacpi_log_usertask("procfs hotkey enable/disable");
4292         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4293                   pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
4294                 pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
4295 }
4296
4297 static int hotkey_write(char *buf)
4298 {
4299         int res;
4300         u32 mask;
4301         char *cmd;
4302
4303         if (!tp_features.hotkey)
4304                 return -ENODEV;
4305
4306         if (mutex_lock_killable(&hotkey_mutex))
4307                 return -ERESTARTSYS;
4308
4309         mask = hotkey_user_mask;
4310
4311         res = 0;
4312         while ((cmd = next_cmd(&buf))) {
4313                 if (strlencmp(cmd, "enable") == 0) {
4314                         hotkey_enabledisable_warn(1);
4315                 } else if (strlencmp(cmd, "disable") == 0) {
4316                         hotkey_enabledisable_warn(0);
4317                         res = -EPERM;
4318                 } else if (strlencmp(cmd, "reset") == 0) {
4319                         mask = (hotkey_all_mask | hotkey_source_mask)
4320                                 & ~hotkey_reserved_mask;
4321                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4322                         /* mask set */
4323                 } else if (sscanf(cmd, "%x", &mask) == 1) {
4324                         /* mask set */
4325                 } else {
4326                         res = -EINVAL;
4327                         goto errexit;
4328                 }
4329         }
4330
4331         if (!res) {
4332                 tpacpi_disclose_usertask("procfs hotkey",
4333                         "set mask to 0x%08x\n", mask);
4334                 res = hotkey_user_mask_set(mask);
4335         }
4336
4337 errexit:
4338         mutex_unlock(&hotkey_mutex);
4339         return res;
4340 }
4341
4342 static const struct acpi_device_id ibm_htk_device_ids[] = {
4343         {TPACPI_ACPI_IBM_HKEY_HID, 0},
4344         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4345         {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4346         {"", 0},
4347 };
4348
4349 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4350         .hid = ibm_htk_device_ids,
4351         .notify = hotkey_notify,
4352         .handle = &hkey_handle,
4353         .type = ACPI_DEVICE_NOTIFY,
4354 };
4355
4356 static struct ibm_struct hotkey_driver_data = {
4357         .name = "hotkey",
4358         .read = hotkey_read,
4359         .write = hotkey_write,
4360         .exit = hotkey_exit,
4361         .resume = hotkey_resume,
4362         .suspend = hotkey_suspend,
4363         .acpi = &ibm_hotkey_acpidriver,
4364 };
4365
4366 /*************************************************************************
4367  * Bluetooth subdriver
4368  */
4369
4370 enum {
4371         /* ACPI GBDC/SBDC bits */
4372         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
4373         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
4374         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
4375                                                    0 = disable, 1 = enable */
4376 };
4377
4378 enum {
4379         /* ACPI \BLTH commands */
4380         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
4381         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
4382         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
4383         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
4384         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
4385 };
4386
4387 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
4388
4389 static int bluetooth_get_status(void)
4390 {
4391         int status;
4392
4393 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4394         if (dbg_bluetoothemul)
4395                 return (tpacpi_bluetooth_emulstate) ?
4396                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4397 #endif
4398
4399         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4400                 return -EIO;
4401
4402         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4403                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4404 }
4405
4406 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4407 {
4408         int status;
4409
4410         vdbg_printk(TPACPI_DBG_RFKILL,
4411                 "will attempt to %s bluetooth\n",
4412                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4413
4414 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4415         if (dbg_bluetoothemul) {
4416                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4417                 return 0;
4418         }
4419 #endif
4420
4421         if (state == TPACPI_RFK_RADIO_ON)
4422                 status = TP_ACPI_BLUETOOTH_RADIOSSW
4423                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
4424         else
4425                 status = 0;
4426
4427         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4428                 return -EIO;
4429
4430         return 0;
4431 }
4432
4433 /* sysfs bluetooth enable ---------------------------------------------- */
4434 static ssize_t bluetooth_enable_show(struct device *dev,
4435                            struct device_attribute *attr,
4436                            char *buf)
4437 {
4438         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4439                         attr, buf);
4440 }
4441
4442 static ssize_t bluetooth_enable_store(struct device *dev,
4443                             struct device_attribute *attr,
4444                             const char *buf, size_t count)
4445 {
4446         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4447                                 attr, buf, count);
4448 }
4449
4450 static DEVICE_ATTR_RW(bluetooth_enable);
4451
4452 /* --------------------------------------------------------------------- */
4453
4454 static struct attribute *bluetooth_attributes[] = {
4455         &dev_attr_bluetooth_enable.attr,
4456         NULL
4457 };
4458
4459 static const struct attribute_group bluetooth_attr_group = {
4460         .attrs = bluetooth_attributes,
4461 };
4462
4463 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4464         .get_status = bluetooth_get_status,
4465         .set_status = bluetooth_set_status,
4466 };
4467
4468 static void bluetooth_shutdown(void)
4469 {
4470         /* Order firmware to save current state to NVRAM */
4471         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4472                         TP_ACPI_BLTH_SAVE_STATE))
4473                 pr_notice("failed to save bluetooth state to NVRAM\n");
4474         else
4475                 vdbg_printk(TPACPI_DBG_RFKILL,
4476                         "bluetooth state saved to NVRAM\n");
4477 }
4478
4479 static void bluetooth_exit(void)
4480 {
4481         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4482                         &bluetooth_attr_group);
4483
4484         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4485
4486         bluetooth_shutdown();
4487 }
4488
4489 static const struct dmi_system_id bt_fwbug_list[] __initconst = {
4490         {
4491                 .ident = "ThinkPad E485",
4492                 .matches = {
4493                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4494                         DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4495                 },
4496         },
4497         {
4498                 .ident = "ThinkPad E585",
4499                 .matches = {
4500                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4501                         DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4502                 },
4503         },
4504         {
4505                 .ident = "ThinkPad A285 - 20MW",
4506                 .matches = {
4507                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4508                         DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4509                 },
4510         },
4511         {
4512                 .ident = "ThinkPad A285 - 20MX",
4513                 .matches = {
4514                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4515                         DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4516                 },
4517         },
4518         {
4519                 .ident = "ThinkPad A485 - 20MU",
4520                 .matches = {
4521                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4522                         DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4523                 },
4524         },
4525         {
4526                 .ident = "ThinkPad A485 - 20MV",
4527                 .matches = {
4528                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4529                         DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4530                 },
4531         },
4532         {}
4533 };
4534
4535 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4536         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4537         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4538         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4539         {}
4540 };
4541
4542
4543 static int __init have_bt_fwbug(void)
4544 {
4545         /*
4546          * Some AMD based ThinkPads have a firmware bug that calling
4547          * "GBDC" will cause bluetooth on Intel wireless cards blocked
4548          */
4549         if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) {
4550                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4551                         FW_BUG "disable bluetooth subdriver for Intel cards\n");
4552                 return 1;
4553         } else
4554                 return 0;
4555 }
4556
4557 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4558 {
4559         int res;
4560         int status = 0;
4561
4562         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4563                         "initializing bluetooth subdriver\n");
4564
4565         TPACPI_ACPIHANDLE_INIT(hkey);
4566
4567         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4568            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4569         tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4570             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4571
4572         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4573                 "bluetooth is %s, status 0x%02x\n",
4574                 str_supported(tp_features.bluetooth),
4575                 status);
4576
4577 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4578         if (dbg_bluetoothemul) {
4579                 tp_features.bluetooth = 1;
4580                 pr_info("bluetooth switch emulation enabled\n");
4581         } else
4582 #endif
4583         if (tp_features.bluetooth &&
4584             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4585                 /* no bluetooth hardware present in system */
4586                 tp_features.bluetooth = 0;
4587                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4588                            "bluetooth hardware not installed\n");
4589         }
4590
4591         if (!tp_features.bluetooth)
4592                 return 1;
4593
4594         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4595                                 &bluetooth_tprfk_ops,
4596                                 RFKILL_TYPE_BLUETOOTH,
4597                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4598                                 true);
4599         if (res)
4600                 return res;
4601
4602         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4603                                 &bluetooth_attr_group);
4604         if (res) {
4605                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4606                 return res;
4607         }
4608
4609         return 0;
4610 }
4611
4612 /* procfs -------------------------------------------------------------- */
4613 static int bluetooth_read(struct seq_file *m)
4614 {
4615         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4616 }
4617
4618 static int bluetooth_write(char *buf)
4619 {
4620         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4621 }
4622
4623 static struct ibm_struct bluetooth_driver_data = {
4624         .name = "bluetooth",
4625         .read = bluetooth_read,
4626         .write = bluetooth_write,
4627         .exit = bluetooth_exit,
4628         .shutdown = bluetooth_shutdown,
4629 };
4630
4631 /*************************************************************************
4632  * Wan subdriver
4633  */
4634
4635 enum {
4636         /* ACPI GWAN/SWAN bits */
4637         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4638         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4639         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4640                                                    0 = disable, 1 = enable */
4641 };
4642
4643 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4644
4645 static int wan_get_status(void)
4646 {
4647         int status;
4648
4649 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4650         if (dbg_wwanemul)
4651                 return (tpacpi_wwan_emulstate) ?
4652                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4653 #endif
4654
4655         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4656                 return -EIO;
4657
4658         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4659                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4660 }
4661
4662 static int wan_set_status(enum tpacpi_rfkill_state state)
4663 {
4664         int status;
4665
4666         vdbg_printk(TPACPI_DBG_RFKILL,
4667                 "will attempt to %s wwan\n",
4668                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4669
4670 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4671         if (dbg_wwanemul) {
4672                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4673                 return 0;
4674         }
4675 #endif
4676
4677         if (state == TPACPI_RFK_RADIO_ON)
4678                 status = TP_ACPI_WANCARD_RADIOSSW
4679                          | TP_ACPI_WANCARD_RESUMECTRL;
4680         else
4681                 status = 0;
4682
4683         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4684                 return -EIO;
4685
4686         return 0;
4687 }
4688
4689 /* sysfs wan enable ---------------------------------------------------- */
4690 static ssize_t wan_enable_show(struct device *dev,
4691                            struct device_attribute *attr,
4692                            char *buf)
4693 {
4694         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4695                         attr, buf);
4696 }
4697
4698 static ssize_t wan_enable_store(struct device *dev,
4699                             struct device_attribute *attr,
4700                             const char *buf, size_t count)
4701 {
4702         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4703                         attr, buf, count);
4704 }
4705
4706 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4707                    wan_enable_show, wan_enable_store);
4708
4709 /* --------------------------------------------------------------------- */
4710
4711 static struct attribute *wan_attributes[] = {
4712         &dev_attr_wwan_enable.attr,
4713         NULL
4714 };
4715
4716 static const struct attribute_group wan_attr_group = {
4717         .attrs = wan_attributes,
4718 };
4719
4720 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4721         .get_status = wan_get_status,
4722         .set_status = wan_set_status,
4723 };
4724
4725 static void wan_shutdown(void)
4726 {
4727         /* Order firmware to save current state to NVRAM */
4728         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4729                         TP_ACPI_WGSV_SAVE_STATE))
4730                 pr_notice("failed to save WWAN state to NVRAM\n");
4731         else
4732                 vdbg_printk(TPACPI_DBG_RFKILL,
4733                         "WWAN state saved to NVRAM\n");
4734 }
4735
4736 static void wan_exit(void)
4737 {
4738         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4739                 &wan_attr_group);
4740
4741         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4742
4743         wan_shutdown();
4744 }
4745
4746 static int __init wan_init(struct ibm_init_struct *iibm)
4747 {
4748         int res;
4749         int status = 0;
4750
4751         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4752                         "initializing wan subdriver\n");
4753
4754         TPACPI_ACPIHANDLE_INIT(hkey);
4755
4756         tp_features.wan = hkey_handle &&
4757             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4758
4759         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4760                 "wan is %s, status 0x%02x\n",
4761                 str_supported(tp_features.wan),
4762                 status);
4763
4764 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4765         if (dbg_wwanemul) {
4766                 tp_features.wan = 1;
4767                 pr_info("wwan switch emulation enabled\n");
4768         } else
4769 #endif
4770         if (tp_features.wan &&
4771             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4772                 /* no wan hardware present in system */
4773                 tp_features.wan = 0;
4774                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4775                            "wan hardware not installed\n");
4776         }
4777
4778         if (!tp_features.wan)
4779                 return 1;
4780
4781         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4782                                 &wan_tprfk_ops,
4783                                 RFKILL_TYPE_WWAN,
4784                                 TPACPI_RFK_WWAN_SW_NAME,
4785                                 true);
4786         if (res)
4787                 return res;
4788
4789         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4790                                 &wan_attr_group);
4791
4792         if (res) {
4793                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4794                 return res;
4795         }
4796
4797         return 0;
4798 }
4799
4800 /* procfs -------------------------------------------------------------- */
4801 static int wan_read(struct seq_file *m)
4802 {
4803         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4804 }
4805
4806 static int wan_write(char *buf)
4807 {
4808         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4809 }
4810
4811 static struct ibm_struct wan_driver_data = {
4812         .name = "wan",
4813         .read = wan_read,
4814         .write = wan_write,
4815         .exit = wan_exit,
4816         .shutdown = wan_shutdown,
4817 };
4818
4819 /*************************************************************************
4820  * UWB subdriver
4821  */
4822
4823 enum {
4824         /* ACPI GUWB/SUWB bits */
4825         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4826         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4827 };
4828
4829 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4830
4831 static int uwb_get_status(void)
4832 {
4833         int status;
4834
4835 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4836         if (dbg_uwbemul)
4837                 return (tpacpi_uwb_emulstate) ?
4838                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4839 #endif
4840
4841         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4842                 return -EIO;
4843
4844         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4845                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4846 }
4847
4848 static int uwb_set_status(enum tpacpi_rfkill_state state)
4849 {
4850         int status;
4851
4852         vdbg_printk(TPACPI_DBG_RFKILL,
4853                 "will attempt to %s UWB\n",
4854                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4855
4856 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4857         if (dbg_uwbemul) {
4858                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4859                 return 0;
4860         }
4861 #endif
4862
4863         if (state == TPACPI_RFK_RADIO_ON)
4864                 status = TP_ACPI_UWB_RADIOSSW;
4865         else
4866                 status = 0;
4867
4868         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4869                 return -EIO;
4870
4871         return 0;
4872 }
4873
4874 /* --------------------------------------------------------------------- */
4875
4876 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4877         .get_status = uwb_get_status,
4878         .set_status = uwb_set_status,
4879 };
4880
4881 static void uwb_exit(void)
4882 {
4883         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4884 }
4885
4886 static int __init uwb_init(struct ibm_init_struct *iibm)
4887 {
4888         int res;
4889         int status = 0;
4890
4891         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4892                         "initializing uwb subdriver\n");
4893
4894         TPACPI_ACPIHANDLE_INIT(hkey);
4895
4896         tp_features.uwb = hkey_handle &&
4897             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4898
4899         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4900                 "uwb is %s, status 0x%02x\n",
4901                 str_supported(tp_features.uwb),
4902                 status);
4903
4904 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4905         if (dbg_uwbemul) {
4906                 tp_features.uwb = 1;
4907                 pr_info("uwb switch emulation enabled\n");
4908         } else
4909 #endif
4910         if (tp_features.uwb &&
4911             !(status & TP_ACPI_UWB_HWPRESENT)) {
4912                 /* no uwb hardware present in system */
4913                 tp_features.uwb = 0;
4914                 dbg_printk(TPACPI_DBG_INIT,
4915                            "uwb hardware not installed\n");
4916         }
4917
4918         if (!tp_features.uwb)
4919                 return 1;
4920
4921         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4922                                 &uwb_tprfk_ops,
4923                                 RFKILL_TYPE_UWB,
4924                                 TPACPI_RFK_UWB_SW_NAME,
4925                                 false);
4926         return res;
4927 }
4928
4929 static struct ibm_struct uwb_driver_data = {
4930         .name = "uwb",
4931         .exit = uwb_exit,
4932         .flags.experimental = 1,
4933 };
4934
4935 /*************************************************************************
4936  * Video subdriver
4937  */
4938
4939 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4940
4941 enum video_access_mode {
4942         TPACPI_VIDEO_NONE = 0,
4943         TPACPI_VIDEO_570,       /* 570 */
4944         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4945         TPACPI_VIDEO_NEW,       /* all others */
4946 };
4947
4948 enum {  /* video status flags, based on VIDEO_570 */
4949         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4950         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4951         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4952 };
4953
4954 enum {  /* TPACPI_VIDEO_570 constants */
4955         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4956         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4957                                                  * video_status_flags */
4958         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4959         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4960 };
4961
4962 static enum video_access_mode video_supported;
4963 static int video_orig_autosw;
4964
4965 static int video_autosw_get(void);
4966 static int video_autosw_set(int enable);
4967
4968 TPACPI_HANDLE(vid, root,
4969               "\\_SB.PCI.AGP.VGA",      /* 570 */
4970               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4971               "\\_SB.PCI0.VID0",        /* 770e */
4972               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4973               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4974               "\\_SB.PCI0.AGP.VID",     /* all others */
4975         );                              /* R30, R31 */
4976
4977 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4978
4979 static int __init video_init(struct ibm_init_struct *iibm)
4980 {
4981         int ivga;
4982
4983         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4984
4985         TPACPI_ACPIHANDLE_INIT(vid);
4986         if (tpacpi_is_ibm())
4987                 TPACPI_ACPIHANDLE_INIT(vid2);
4988
4989         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4990                 /* G41, assume IVGA doesn't change */
4991                 vid_handle = vid2_handle;
4992
4993         if (!vid_handle)
4994                 /* video switching not supported on R30, R31 */
4995                 video_supported = TPACPI_VIDEO_NONE;
4996         else if (tpacpi_is_ibm() &&
4997                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4998                 /* 570 */
4999                 video_supported = TPACPI_VIDEO_570;
5000         else if (tpacpi_is_ibm() &&
5001                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
5002                 /* 600e/x, 770e, 770x */
5003                 video_supported = TPACPI_VIDEO_770;
5004         else
5005                 /* all others */
5006                 video_supported = TPACPI_VIDEO_NEW;
5007
5008         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
5009                 str_supported(video_supported != TPACPI_VIDEO_NONE),
5010                 video_supported);
5011
5012         return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
5013 }
5014
5015 static void video_exit(void)
5016 {
5017         dbg_printk(TPACPI_DBG_EXIT,
5018                    "restoring original video autoswitch mode\n");
5019         if (video_autosw_set(video_orig_autosw))
5020                 pr_err("error while trying to restore original video autoswitch mode\n");
5021 }
5022
5023 static int video_outputsw_get(void)
5024 {
5025         int status = 0;
5026         int i;
5027
5028         switch (video_supported) {
5029         case TPACPI_VIDEO_570:
5030                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5031                                  TP_ACPI_VIDEO_570_PHSCMD))
5032                         return -EIO;
5033                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
5034                 break;
5035         case TPACPI_VIDEO_770:
5036                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5037                         return -EIO;
5038                 if (i)
5039                         status |= TP_ACPI_VIDEO_S_LCD;
5040                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5041                         return -EIO;
5042                 if (i)
5043                         status |= TP_ACPI_VIDEO_S_CRT;
5044                 break;
5045         case TPACPI_VIDEO_NEW:
5046                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5047                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5048                         return -EIO;
5049                 if (i)
5050                         status |= TP_ACPI_VIDEO_S_CRT;
5051
5052                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5053                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5054                         return -EIO;
5055                 if (i)
5056                         status |= TP_ACPI_VIDEO_S_LCD;
5057                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5058                         return -EIO;
5059                 if (i)
5060                         status |= TP_ACPI_VIDEO_S_DVI;
5061                 break;
5062         default:
5063                 return -ENOSYS;
5064         }
5065
5066         return status;
5067 }
5068
5069 static int video_outputsw_set(int status)
5070 {
5071         int autosw;
5072         int res = 0;
5073
5074         switch (video_supported) {
5075         case TPACPI_VIDEO_570:
5076                 res = acpi_evalf(NULL, NULL,
5077                                  "\\_SB.PHS2", "vdd",
5078                                  TP_ACPI_VIDEO_570_PHS2CMD,
5079                                  status | TP_ACPI_VIDEO_570_PHS2SET);
5080                 break;
5081         case TPACPI_VIDEO_770:
5082                 autosw = video_autosw_get();
5083                 if (autosw < 0)
5084                         return autosw;
5085
5086                 res = video_autosw_set(1);
5087                 if (res)
5088                         return res;
5089                 res = acpi_evalf(vid_handle, NULL,
5090                                  "ASWT", "vdd", status * 0x100, 0);
5091                 if (!autosw && video_autosw_set(autosw)) {
5092                         pr_err("video auto-switch left enabled due to error\n");
5093                         return -EIO;
5094                 }
5095                 break;
5096         case TPACPI_VIDEO_NEW:
5097                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5098                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5099                 break;
5100         default:
5101                 return -ENOSYS;
5102         }
5103
5104         return (res) ? 0 : -EIO;
5105 }
5106
5107 static int video_autosw_get(void)
5108 {
5109         int autosw = 0;
5110
5111         switch (video_supported) {
5112         case TPACPI_VIDEO_570:
5113                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5114                         return -EIO;
5115                 break;
5116         case TPACPI_VIDEO_770:
5117         case TPACPI_VIDEO_NEW:
5118                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5119                         return -EIO;
5120                 break;
5121         default:
5122                 return -ENOSYS;
5123         }
5124
5125         return autosw & 1;
5126 }
5127
5128 static int video_autosw_set(int enable)
5129 {
5130         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5131                 return -EIO;
5132         return 0;
5133 }
5134
5135 static int video_outputsw_cycle(void)
5136 {
5137         int autosw = video_autosw_get();
5138         int res;
5139
5140         if (autosw < 0)
5141                 return autosw;
5142
5143         switch (video_supported) {
5144         case TPACPI_VIDEO_570:
5145                 res = video_autosw_set(1);
5146                 if (res)
5147                         return res;
5148                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5149                 break;
5150         case TPACPI_VIDEO_770:
5151         case TPACPI_VIDEO_NEW:
5152                 res = video_autosw_set(1);
5153                 if (res)
5154                         return res;
5155                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5156                 break;
5157         default:
5158                 return -ENOSYS;
5159         }
5160         if (!autosw && video_autosw_set(autosw)) {
5161                 pr_err("video auto-switch left enabled due to error\n");
5162                 return -EIO;
5163         }
5164
5165         return (res) ? 0 : -EIO;
5166 }
5167
5168 static int video_expand_toggle(void)
5169 {
5170         switch (video_supported) {
5171         case TPACPI_VIDEO_570:
5172                 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5173                         0 : -EIO;
5174         case TPACPI_VIDEO_770:
5175                 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5176                         0 : -EIO;
5177         case TPACPI_VIDEO_NEW:
5178                 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5179                         0 : -EIO;
5180         default:
5181                 return -ENOSYS;
5182         }
5183         /* not reached */
5184 }
5185
5186 static int video_read(struct seq_file *m)
5187 {
5188         int status, autosw;
5189
5190         if (video_supported == TPACPI_VIDEO_NONE) {
5191                 seq_printf(m, "status:\t\tnot supported\n");
5192                 return 0;
5193         }
5194
5195         /* Even reads can crash X.org, so... */
5196         if (!capable(CAP_SYS_ADMIN))
5197                 return -EPERM;
5198
5199         status = video_outputsw_get();
5200         if (status < 0)
5201                 return status;
5202
5203         autosw = video_autosw_get();
5204         if (autosw < 0)
5205                 return autosw;
5206
5207         seq_printf(m, "status:\t\tsupported\n");
5208         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
5209         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
5210         if (video_supported == TPACPI_VIDEO_NEW)
5211                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
5212         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
5213         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5214         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5215         if (video_supported == TPACPI_VIDEO_NEW)
5216                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5217         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5218         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5219
5220         return 0;
5221 }
5222
5223 static int video_write(char *buf)
5224 {
5225         char *cmd;
5226         int enable, disable, status;
5227         int res;
5228
5229         if (video_supported == TPACPI_VIDEO_NONE)
5230                 return -ENODEV;
5231
5232         /* Even reads can crash X.org, let alone writes... */
5233         if (!capable(CAP_SYS_ADMIN))
5234                 return -EPERM;
5235
5236         enable = 0;
5237         disable = 0;
5238
5239         while ((cmd = next_cmd(&buf))) {
5240                 if (strlencmp(cmd, "lcd_enable") == 0) {
5241                         enable |= TP_ACPI_VIDEO_S_LCD;
5242                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
5243                         disable |= TP_ACPI_VIDEO_S_LCD;
5244                 } else if (strlencmp(cmd, "crt_enable") == 0) {
5245                         enable |= TP_ACPI_VIDEO_S_CRT;
5246                 } else if (strlencmp(cmd, "crt_disable") == 0) {
5247                         disable |= TP_ACPI_VIDEO_S_CRT;
5248                 } else if (video_supported == TPACPI_VIDEO_NEW &&
5249                            strlencmp(cmd, "dvi_enable") == 0) {
5250                         enable |= TP_ACPI_VIDEO_S_DVI;
5251                 } else if (video_supported == TPACPI_VIDEO_NEW &&
5252                            strlencmp(cmd, "dvi_disable") == 0) {
5253                         disable |= TP_ACPI_VIDEO_S_DVI;
5254                 } else if (strlencmp(cmd, "auto_enable") == 0) {
5255                         res = video_autosw_set(1);
5256                         if (res)
5257                                 return res;
5258                 } else if (strlencmp(cmd, "auto_disable") == 0) {
5259                         res = video_autosw_set(0);
5260                         if (res)
5261                                 return res;
5262                 } else if (strlencmp(cmd, "video_switch") == 0) {
5263                         res = video_outputsw_cycle();
5264                         if (res)
5265                                 return res;
5266                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
5267                         res = video_expand_toggle();
5268                         if (res)
5269                                 return res;
5270                 } else
5271                         return -EINVAL;
5272         }
5273
5274         if (enable || disable) {
5275                 status = video_outputsw_get();
5276                 if (status < 0)
5277                         return status;
5278                 res = video_outputsw_set((status & ~disable) | enable);
5279                 if (res)
5280                         return res;
5281         }
5282
5283         return 0;
5284 }
5285
5286 static struct ibm_struct video_driver_data = {
5287         .name = "video",
5288         .read = video_read,
5289         .write = video_write,
5290         .exit = video_exit,
5291 };
5292
5293 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5294
5295 /*************************************************************************
5296  * Keyboard backlight subdriver
5297  */
5298
5299 static enum led_brightness kbdlight_brightness;
5300 static DEFINE_MUTEX(kbdlight_mutex);
5301
5302 static int kbdlight_set_level(int level)
5303 {
5304         int ret = 0;
5305
5306         if (!hkey_handle)
5307                 return -ENXIO;
5308
5309         mutex_lock(&kbdlight_mutex);
5310
5311         if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5312                 ret = -EIO;
5313         else
5314                 kbdlight_brightness = level;
5315
5316         mutex_unlock(&kbdlight_mutex);
5317
5318         return ret;
5319 }
5320
5321 static int kbdlight_get_level(void)
5322 {
5323         int status = 0;
5324
5325         if (!hkey_handle)
5326                 return -ENXIO;
5327
5328         if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5329                 return -EIO;
5330
5331         if (status < 0)
5332                 return status;
5333
5334         return status & 0x3;
5335 }
5336
5337 static bool kbdlight_is_supported(void)
5338 {
5339         int status = 0;
5340
5341         if (!hkey_handle)
5342                 return false;
5343
5344         if (!acpi_has_method(hkey_handle, "MLCG")) {
5345                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5346                 return false;
5347         }
5348
5349         if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5350                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5351                 return false;
5352         }
5353
5354         if (status < 0) {
5355                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5356                 return false;
5357         }
5358
5359         vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5360         /*
5361          * Guessed test for keyboard backlight:
5362          *
5363          * Machines with backlight keyboard return:
5364          *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5365          *   b110100010010000000XX - ThinkPad x230
5366          *   b010100000010000000XX - ThinkPad x240
5367          *   b010100000010000000XX - ThinkPad W541
5368          * (XX is current backlight level)
5369          *
5370          * Machines without backlight keyboard return:
5371          *   b10100001000000000000 - ThinkPad x230
5372          *   b10110001000000000000 - ThinkPad E430
5373          *   b00000000000000000000 - ThinkPad E450
5374          *
5375          * Candidate BITs for detection test (XOR):
5376          *   b01000000001000000000
5377          *              ^
5378          */
5379         return status & BIT(9);
5380 }
5381
5382 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5383                         enum led_brightness brightness)
5384 {
5385         return kbdlight_set_level(brightness);
5386 }
5387
5388 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5389 {
5390         int level;
5391
5392         level = kbdlight_get_level();
5393         if (level < 0)
5394                 return 0;
5395
5396         return level;
5397 }
5398
5399 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5400         .led_classdev = {
5401                 .name           = "tpacpi::kbd_backlight",
5402                 .max_brightness = 2,
5403                 .flags          = LED_BRIGHT_HW_CHANGED,
5404                 .brightness_set_blocking = &kbdlight_sysfs_set,
5405                 .brightness_get = &kbdlight_sysfs_get,
5406         }
5407 };
5408
5409 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5410 {
5411         int rc;
5412
5413         vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5414
5415         TPACPI_ACPIHANDLE_INIT(hkey);
5416
5417         if (!kbdlight_is_supported()) {
5418                 tp_features.kbdlight = 0;
5419                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5420                 return 1;
5421         }
5422
5423         kbdlight_brightness = kbdlight_sysfs_get(NULL);
5424         tp_features.kbdlight = 1;
5425
5426         rc = led_classdev_register(&tpacpi_pdev->dev,
5427                                    &tpacpi_led_kbdlight.led_classdev);
5428         if (rc < 0) {
5429                 tp_features.kbdlight = 0;
5430                 return rc;
5431         }
5432
5433         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5434                                       TP_ACPI_HKEY_KBD_LIGHT_MASK);
5435         return 0;
5436 }
5437
5438 static void kbdlight_exit(void)
5439 {
5440         if (tp_features.kbdlight)
5441                 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5442 }
5443
5444 static int kbdlight_set_level_and_update(int level)
5445 {
5446         int ret;
5447         struct led_classdev *led_cdev;
5448
5449         ret = kbdlight_set_level(level);
5450         led_cdev = &tpacpi_led_kbdlight.led_classdev;
5451
5452         if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5453                 led_cdev->brightness = level;
5454
5455         return ret;
5456 }
5457
5458 static int kbdlight_read(struct seq_file *m)
5459 {
5460         int level;
5461
5462         if (!tp_features.kbdlight) {
5463                 seq_printf(m, "status:\t\tnot supported\n");
5464         } else {
5465                 level = kbdlight_get_level();
5466                 if (level < 0)
5467                         seq_printf(m, "status:\t\terror %d\n", level);
5468                 else
5469                         seq_printf(m, "status:\t\t%d\n", level);
5470                 seq_printf(m, "commands:\t0, 1, 2\n");
5471         }
5472
5473         return 0;
5474 }
5475
5476 static int kbdlight_write(char *buf)
5477 {
5478         char *cmd;
5479         int level = -1;
5480
5481         if (!tp_features.kbdlight)
5482                 return -ENODEV;
5483
5484         while ((cmd = next_cmd(&buf))) {
5485                 if (strlencmp(cmd, "0") == 0)
5486                         level = 0;
5487                 else if (strlencmp(cmd, "1") == 0)
5488                         level = 1;
5489                 else if (strlencmp(cmd, "2") == 0)
5490                         level = 2;
5491                 else
5492                         return -EINVAL;
5493         }
5494
5495         if (level == -1)
5496                 return -EINVAL;
5497
5498         return kbdlight_set_level_and_update(level);
5499 }
5500
5501 static void kbdlight_suspend(void)
5502 {
5503         struct led_classdev *led_cdev;
5504
5505         if (!tp_features.kbdlight)
5506                 return;
5507
5508         led_cdev = &tpacpi_led_kbdlight.led_classdev;
5509         led_update_brightness(led_cdev);
5510         led_classdev_suspend(led_cdev);
5511 }
5512
5513 static void kbdlight_resume(void)
5514 {
5515         if (!tp_features.kbdlight)
5516                 return;
5517
5518         led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5519 }
5520
5521 static struct ibm_struct kbdlight_driver_data = {
5522         .name = "kbdlight",
5523         .read = kbdlight_read,
5524         .write = kbdlight_write,
5525         .suspend = kbdlight_suspend,
5526         .resume = kbdlight_resume,
5527         .exit = kbdlight_exit,
5528 };
5529
5530 /*************************************************************************
5531  * Light (thinklight) subdriver
5532  */
5533
5534 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
5535 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
5536
5537 static int light_get_status(void)
5538 {
5539         int status = 0;
5540
5541         if (tp_features.light_status) {
5542                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5543                         return -EIO;
5544                 return (!!status);
5545         }
5546
5547         return -ENXIO;
5548 }
5549
5550 static int light_set_status(int status)
5551 {
5552         int rc;
5553
5554         if (tp_features.light) {
5555                 if (cmos_handle) {
5556                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5557                                         (status) ?
5558                                                 TP_CMOS_THINKLIGHT_ON :
5559                                                 TP_CMOS_THINKLIGHT_OFF);
5560                 } else {
5561                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5562                                         (status) ? 1 : 0);
5563                 }
5564                 return (rc) ? 0 : -EIO;
5565         }
5566
5567         return -ENXIO;
5568 }
5569
5570 static int light_sysfs_set(struct led_classdev *led_cdev,
5571                         enum led_brightness brightness)
5572 {
5573         return light_set_status((brightness != LED_OFF) ?
5574                                 TPACPI_LED_ON : TPACPI_LED_OFF);
5575 }
5576
5577 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5578 {
5579         return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5580 }
5581
5582 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5583         .led_classdev = {
5584                 .name           = "tpacpi::thinklight",
5585                 .brightness_set_blocking = &light_sysfs_set,
5586                 .brightness_get = &light_sysfs_get,
5587         }
5588 };
5589
5590 static int __init light_init(struct ibm_init_struct *iibm)
5591 {
5592         int rc;
5593
5594         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5595
5596         if (tpacpi_is_ibm()) {
5597                 TPACPI_ACPIHANDLE_INIT(ledb);
5598                 TPACPI_ACPIHANDLE_INIT(lght);
5599         }
5600         TPACPI_ACPIHANDLE_INIT(cmos);
5601
5602         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5603         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5604
5605         if (tp_features.light)
5606                 /* light status not supported on
5607                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5608                 tp_features.light_status =
5609                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5610
5611         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5612                 str_supported(tp_features.light),
5613                 str_supported(tp_features.light_status));
5614
5615         if (!tp_features.light)
5616                 return 1;
5617
5618         rc = led_classdev_register(&tpacpi_pdev->dev,
5619                                    &tpacpi_led_thinklight.led_classdev);
5620
5621         if (rc < 0) {
5622                 tp_features.light = 0;
5623                 tp_features.light_status = 0;
5624         } else  {
5625                 rc = 0;
5626         }
5627
5628         return rc;
5629 }
5630
5631 static void light_exit(void)
5632 {
5633         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5634 }
5635
5636 static int light_read(struct seq_file *m)
5637 {
5638         int status;
5639
5640         if (!tp_features.light) {
5641                 seq_printf(m, "status:\t\tnot supported\n");
5642         } else if (!tp_features.light_status) {
5643                 seq_printf(m, "status:\t\tunknown\n");
5644                 seq_printf(m, "commands:\ton, off\n");
5645         } else {
5646                 status = light_get_status();
5647                 if (status < 0)
5648                         return status;
5649                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5650                 seq_printf(m, "commands:\ton, off\n");
5651         }
5652
5653         return 0;
5654 }
5655
5656 static int light_write(char *buf)
5657 {
5658         char *cmd;
5659         int newstatus = 0;
5660
5661         if (!tp_features.light)
5662                 return -ENODEV;
5663
5664         while ((cmd = next_cmd(&buf))) {
5665                 if (strlencmp(cmd, "on") == 0) {
5666                         newstatus = 1;
5667                 } else if (strlencmp(cmd, "off") == 0) {
5668                         newstatus = 0;
5669                 } else
5670                         return -EINVAL;
5671         }
5672
5673         return light_set_status(newstatus);
5674 }
5675
5676 static struct ibm_struct light_driver_data = {
5677         .name = "light",
5678         .read = light_read,
5679         .write = light_write,
5680         .exit = light_exit,
5681 };
5682
5683 /*************************************************************************
5684  * CMOS subdriver
5685  */
5686
5687 /* sysfs cmos_command -------------------------------------------------- */
5688 static ssize_t cmos_command_store(struct device *dev,
5689                             struct device_attribute *attr,
5690                             const char *buf, size_t count)
5691 {
5692         unsigned long cmos_cmd;
5693         int res;
5694
5695         if (parse_strtoul(buf, 21, &cmos_cmd))
5696                 return -EINVAL;
5697
5698         res = issue_thinkpad_cmos_command(cmos_cmd);
5699         return (res) ? res : count;
5700 }
5701
5702 static DEVICE_ATTR_WO(cmos_command);
5703
5704 /* --------------------------------------------------------------------- */
5705
5706 static int __init cmos_init(struct ibm_init_struct *iibm)
5707 {
5708         int res;
5709
5710         vdbg_printk(TPACPI_DBG_INIT,
5711                 "initializing cmos commands subdriver\n");
5712
5713         TPACPI_ACPIHANDLE_INIT(cmos);
5714
5715         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5716                 str_supported(cmos_handle != NULL));
5717
5718         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5719         if (res)
5720                 return res;
5721
5722         return (cmos_handle) ? 0 : 1;
5723 }
5724
5725 static void cmos_exit(void)
5726 {
5727         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5728 }
5729
5730 static int cmos_read(struct seq_file *m)
5731 {
5732         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5733            R30, R31, T20-22, X20-21 */
5734         if (!cmos_handle)
5735                 seq_printf(m, "status:\t\tnot supported\n");
5736         else {
5737                 seq_printf(m, "status:\t\tsupported\n");
5738                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5739         }
5740
5741         return 0;
5742 }
5743
5744 static int cmos_write(char *buf)
5745 {
5746         char *cmd;
5747         int cmos_cmd, res;
5748
5749         while ((cmd = next_cmd(&buf))) {
5750                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5751                     cmos_cmd >= 0 && cmos_cmd <= 21) {
5752                         /* cmos_cmd set */
5753                 } else
5754                         return -EINVAL;
5755
5756                 res = issue_thinkpad_cmos_command(cmos_cmd);
5757                 if (res)
5758                         return res;
5759         }
5760
5761         return 0;
5762 }
5763
5764 static struct ibm_struct cmos_driver_data = {
5765         .name = "cmos",
5766         .read = cmos_read,
5767         .write = cmos_write,
5768         .exit = cmos_exit,
5769 };
5770
5771 /*************************************************************************
5772  * LED subdriver
5773  */
5774
5775 enum led_access_mode {
5776         TPACPI_LED_NONE = 0,
5777         TPACPI_LED_570, /* 570 */
5778         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5779         TPACPI_LED_NEW, /* all others */
5780 };
5781
5782 enum {  /* For TPACPI_LED_OLD */
5783         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5784         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5785         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5786 };
5787
5788 static enum led_access_mode led_supported;
5789
5790 static acpi_handle led_handle;
5791
5792 #define TPACPI_LED_NUMLEDS 16
5793 static struct tpacpi_led_classdev *tpacpi_leds;
5794 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5795 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5796         /* there's a limit of 19 chars + NULL before 2.6.26 */
5797         "tpacpi::power",
5798         "tpacpi:orange:batt",
5799         "tpacpi:green:batt",
5800         "tpacpi::dock_active",
5801         "tpacpi::bay_active",
5802         "tpacpi::dock_batt",
5803         "tpacpi::unknown_led",
5804         "tpacpi::standby",
5805         "tpacpi::dock_status1",
5806         "tpacpi::dock_status2",
5807         "tpacpi::unknown_led2",
5808         "tpacpi::unknown_led3",
5809         "tpacpi::thinkvantage",
5810 };
5811 #define TPACPI_SAFE_LEDS        0x1081U
5812
5813 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5814 {
5815 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5816         return false;
5817 #else
5818         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5819 #endif
5820 }
5821
5822 static int led_get_status(const unsigned int led)
5823 {
5824         int status;
5825         enum led_status_t led_s;
5826
5827         switch (led_supported) {
5828         case TPACPI_LED_570:
5829                 if (!acpi_evalf(ec_handle,
5830                                 &status, "GLED", "dd", 1 << led))
5831                         return -EIO;
5832                 led_s = (status == 0) ?
5833                                 TPACPI_LED_OFF :
5834                                 ((status == 1) ?
5835                                         TPACPI_LED_ON :
5836                                         TPACPI_LED_BLINK);
5837                 tpacpi_led_state_cache[led] = led_s;
5838                 return led_s;
5839         default:
5840                 return -ENXIO;
5841         }
5842
5843         /* not reached */
5844 }
5845
5846 static int led_set_status(const unsigned int led,
5847                           const enum led_status_t ledstatus)
5848 {
5849         /* off, on, blink. Index is led_status_t */
5850         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5851         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5852
5853         int rc = 0;
5854
5855         switch (led_supported) {
5856         case TPACPI_LED_570:
5857                 /* 570 */
5858                 if (unlikely(led > 7))
5859                         return -EINVAL;
5860                 if (unlikely(tpacpi_is_led_restricted(led)))
5861                         return -EPERM;
5862                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5863                                 (1 << led), led_sled_arg1[ledstatus]))
5864                         return -EIO;
5865                 break;
5866         case TPACPI_LED_OLD:
5867                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5868                 if (unlikely(led > 7))
5869                         return -EINVAL;
5870                 if (unlikely(tpacpi_is_led_restricted(led)))
5871                         return -EPERM;
5872                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5873                 if (rc >= 0)
5874                         rc = ec_write(TPACPI_LED_EC_HLBL,
5875                                       (ledstatus == TPACPI_LED_BLINK) << led);
5876                 if (rc >= 0)
5877                         rc = ec_write(TPACPI_LED_EC_HLCL,
5878                                       (ledstatus != TPACPI_LED_OFF) << led);
5879                 break;
5880         case TPACPI_LED_NEW:
5881                 /* all others */
5882                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5883                         return -EINVAL;
5884                 if (unlikely(tpacpi_is_led_restricted(led)))
5885                         return -EPERM;
5886                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5887                                 led, led_led_arg1[ledstatus]))
5888                         return -EIO;
5889                 break;
5890         default:
5891                 return -ENXIO;
5892         }
5893
5894         if (!rc)
5895                 tpacpi_led_state_cache[led] = ledstatus;
5896
5897         return rc;
5898 }
5899
5900 static int led_sysfs_set(struct led_classdev *led_cdev,
5901                         enum led_brightness brightness)
5902 {
5903         struct tpacpi_led_classdev *data = container_of(led_cdev,
5904                              struct tpacpi_led_classdev, led_classdev);
5905         enum led_status_t new_state;
5906
5907         if (brightness == LED_OFF)
5908                 new_state = TPACPI_LED_OFF;
5909         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5910                 new_state = TPACPI_LED_ON;
5911         else
5912                 new_state = TPACPI_LED_BLINK;
5913
5914         return led_set_status(data->led, new_state);
5915 }
5916
5917 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5918                         unsigned long *delay_on, unsigned long *delay_off)
5919 {
5920         struct tpacpi_led_classdev *data = container_of(led_cdev,
5921                              struct tpacpi_led_classdev, led_classdev);
5922
5923         /* Can we choose the flash rate? */
5924         if (*delay_on == 0 && *delay_off == 0) {
5925                 /* yes. set them to the hardware blink rate (1 Hz) */
5926                 *delay_on = 500; /* ms */
5927                 *delay_off = 500; /* ms */
5928         } else if ((*delay_on != 500) || (*delay_off != 500))
5929                 return -EINVAL;
5930
5931         return led_set_status(data->led, TPACPI_LED_BLINK);
5932 }
5933
5934 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5935 {
5936         int rc;
5937
5938         struct tpacpi_led_classdev *data = container_of(led_cdev,
5939                              struct tpacpi_led_classdev, led_classdev);
5940
5941         rc = led_get_status(data->led);
5942
5943         if (rc == TPACPI_LED_OFF || rc < 0)
5944                 rc = LED_OFF;   /* no error handling in led class :( */
5945         else
5946                 rc = LED_FULL;
5947
5948         return rc;
5949 }
5950
5951 static void led_exit(void)
5952 {
5953         unsigned int i;
5954
5955         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5956                 if (tpacpi_leds[i].led_classdev.name)
5957                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5958         }
5959
5960         kfree(tpacpi_leds);
5961 }
5962
5963 static int __init tpacpi_init_led(unsigned int led)
5964 {
5965         int rc;
5966
5967         tpacpi_leds[led].led = led;
5968
5969         /* LEDs with no name don't get registered */
5970         if (!tpacpi_led_names[led])
5971                 return 0;
5972
5973         tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5974         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5975         if (led_supported == TPACPI_LED_570)
5976                 tpacpi_leds[led].led_classdev.brightness_get =
5977                                                 &led_sysfs_get;
5978
5979         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5980
5981         rc = led_classdev_register(&tpacpi_pdev->dev,
5982                                 &tpacpi_leds[led].led_classdev);
5983         if (rc < 0)
5984                 tpacpi_leds[led].led_classdev.name = NULL;
5985
5986         return rc;
5987 }
5988
5989 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5990         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5991         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5992         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5993
5994         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5995         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5996         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5997         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5998         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5999         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
6000         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
6001         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
6002
6003         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
6004         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
6005         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
6006         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
6007         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
6008
6009         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
6010         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
6011         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
6012         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
6013
6014         /* (1) - may have excess leds enabled on MSB */
6015
6016         /* Defaults (order matters, keep last, don't reorder!) */
6017         { /* Lenovo */
6018           .vendor = PCI_VENDOR_ID_LENOVO,
6019           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6020           .quirks = 0x1fffU,
6021         },
6022         { /* IBM ThinkPads with no EC version string */
6023           .vendor = PCI_VENDOR_ID_IBM,
6024           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6025           .quirks = 0x00ffU,
6026         },
6027         { /* IBM ThinkPads with EC version string */
6028           .vendor = PCI_VENDOR_ID_IBM,
6029           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6030           .quirks = 0x00bfU,
6031         },
6032 };
6033
6034 static enum led_access_mode __init led_init_detect_mode(void)
6035 {
6036         acpi_status status;
6037
6038         if (tpacpi_is_ibm()) {
6039                 /* 570 */
6040                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6041                 if (ACPI_SUCCESS(status))
6042                         return TPACPI_LED_570;
6043
6044                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6045                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6046                 if (ACPI_SUCCESS(status))
6047                         return TPACPI_LED_OLD;
6048         }
6049
6050         /* most others */
6051         status = acpi_get_handle(ec_handle, "LED", &led_handle);
6052         if (ACPI_SUCCESS(status))
6053                 return TPACPI_LED_NEW;
6054
6055         /* R30, R31, and unknown firmwares */
6056         led_handle = NULL;
6057         return TPACPI_LED_NONE;
6058 }
6059
6060 static int __init led_init(struct ibm_init_struct *iibm)
6061 {
6062         unsigned int i;
6063         int rc;
6064         unsigned long useful_leds;
6065
6066         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6067
6068         led_supported = led_init_detect_mode();
6069
6070         if (led_supported != TPACPI_LED_NONE) {
6071                 useful_leds = tpacpi_check_quirks(led_useful_qtable,
6072                                 ARRAY_SIZE(led_useful_qtable));
6073
6074                 if (!useful_leds) {
6075                         led_handle = NULL;
6076                         led_supported = TPACPI_LED_NONE;
6077                 }
6078         }
6079
6080         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6081                 str_supported(led_supported), led_supported);
6082
6083         if (led_supported == TPACPI_LED_NONE)
6084                 return 1;
6085
6086         tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6087                               GFP_KERNEL);
6088         if (!tpacpi_leds) {
6089                 pr_err("Out of memory for LED data\n");
6090                 return -ENOMEM;
6091         }
6092
6093         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6094                 tpacpi_leds[i].led = -1;
6095
6096                 if (!tpacpi_is_led_restricted(i) &&
6097                     test_bit(i, &useful_leds)) {
6098                         rc = tpacpi_init_led(i);
6099                         if (rc < 0) {
6100                                 led_exit();
6101                                 return rc;
6102                         }
6103                 }
6104         }
6105
6106 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6107         pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6108 #endif
6109         return 0;
6110 }
6111
6112 #define str_led_status(s) \
6113         ((s) == TPACPI_LED_OFF ? "off" : \
6114                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
6115
6116 static int led_read(struct seq_file *m)
6117 {
6118         if (!led_supported) {
6119                 seq_printf(m, "status:\t\tnot supported\n");
6120                 return 0;
6121         }
6122         seq_printf(m, "status:\t\tsupported\n");
6123
6124         if (led_supported == TPACPI_LED_570) {
6125                 /* 570 */
6126                 int i, status;
6127                 for (i = 0; i < 8; i++) {
6128                         status = led_get_status(i);
6129                         if (status < 0)
6130                                 return -EIO;
6131                         seq_printf(m, "%d:\t\t%s\n",
6132                                        i, str_led_status(status));
6133                 }
6134         }
6135
6136         seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6137
6138         return 0;
6139 }
6140
6141 static int led_write(char *buf)
6142 {
6143         char *cmd;
6144         int led, rc;
6145         enum led_status_t s;
6146
6147         if (!led_supported)
6148                 return -ENODEV;
6149
6150         while ((cmd = next_cmd(&buf))) {
6151                 if (sscanf(cmd, "%d", &led) != 1)
6152                         return -EINVAL;
6153
6154                 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
6155                                 tpacpi_leds[led].led < 0)
6156                         return -ENODEV;
6157
6158                 if (strstr(cmd, "off")) {
6159                         s = TPACPI_LED_OFF;
6160                 } else if (strstr(cmd, "on")) {
6161                         s = TPACPI_LED_ON;
6162                 } else if (strstr(cmd, "blink")) {
6163                         s = TPACPI_LED_BLINK;
6164                 } else {
6165                         return -EINVAL;
6166                 }
6167
6168                 rc = led_set_status(led, s);
6169                 if (rc < 0)
6170                         return rc;
6171         }
6172
6173         return 0;
6174 }
6175
6176 static struct ibm_struct led_driver_data = {
6177         .name = "led",
6178         .read = led_read,
6179         .write = led_write,
6180         .exit = led_exit,
6181 };
6182
6183 /*************************************************************************
6184  * Beep subdriver
6185  */
6186
6187 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
6188
6189 #define TPACPI_BEEP_Q1 0x0001
6190
6191 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6192         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6193         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6194 };
6195
6196 static int __init beep_init(struct ibm_init_struct *iibm)
6197 {
6198         unsigned long quirks;
6199
6200         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6201
6202         TPACPI_ACPIHANDLE_INIT(beep);
6203
6204         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6205                 str_supported(beep_handle != NULL));
6206
6207         quirks = tpacpi_check_quirks(beep_quirk_table,
6208                                      ARRAY_SIZE(beep_quirk_table));
6209
6210         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6211
6212         return (beep_handle) ? 0 : 1;
6213 }
6214
6215 static int beep_read(struct seq_file *m)
6216 {
6217         if (!beep_handle)
6218                 seq_printf(m, "status:\t\tnot supported\n");
6219         else {
6220                 seq_printf(m, "status:\t\tsupported\n");
6221                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6222         }
6223
6224         return 0;
6225 }
6226
6227 static int beep_write(char *buf)
6228 {
6229         char *cmd;
6230         int beep_cmd;
6231
6232         if (!beep_handle)
6233                 return -ENODEV;
6234
6235         while ((cmd = next_cmd(&buf))) {
6236                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6237                     beep_cmd >= 0 && beep_cmd <= 17) {
6238                         /* beep_cmd set */
6239                 } else
6240                         return -EINVAL;
6241                 if (tp_features.beep_needs_two_args) {
6242                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6243                                         beep_cmd, 0))
6244                                 return -EIO;
6245                 } else {
6246                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6247                                         beep_cmd))
6248                                 return -EIO;
6249                 }
6250         }
6251
6252         return 0;
6253 }
6254
6255 static struct ibm_struct beep_driver_data = {
6256         .name = "beep",
6257         .read = beep_read,
6258         .write = beep_write,
6259 };
6260
6261 /*************************************************************************
6262  * Thermal subdriver
6263  */
6264
6265 enum thermal_access_mode {
6266         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
6267         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
6268         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
6269         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
6270         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
6271 };
6272
6273 enum { /* TPACPI_THERMAL_TPEC_* */
6274         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
6275         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
6276         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
6277
6278         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6279 };
6280
6281
6282 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
6283 struct ibm_thermal_sensors_struct {
6284         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6285 };
6286
6287 static enum thermal_access_mode thermal_read_mode;
6288
6289 /* idx is zero-based */
6290 static int thermal_get_sensor(int idx, s32 *value)
6291 {
6292         int t;
6293         s8 tmp;
6294         char tmpi[5];
6295
6296         t = TP_EC_THERMAL_TMP0;
6297
6298         switch (thermal_read_mode) {
6299 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6300         case TPACPI_THERMAL_TPEC_16:
6301                 if (idx >= 8 && idx <= 15) {
6302                         t = TP_EC_THERMAL_TMP8;
6303                         idx -= 8;
6304                 }
6305 #endif
6306                 /* fallthrough */
6307         case TPACPI_THERMAL_TPEC_8:
6308                 if (idx <= 7) {
6309                         if (!acpi_ec_read(t + idx, &tmp))
6310                                 return -EIO;
6311                         *value = tmp * 1000;
6312                         return 0;
6313                 }
6314                 break;
6315
6316         case TPACPI_THERMAL_ACPI_UPDT:
6317                 if (idx <= 7) {
6318                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6319                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6320                                 return -EIO;
6321                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6322                                 return -EIO;
6323                         *value = (t - 2732) * 100;
6324                         return 0;
6325                 }
6326                 break;
6327
6328         case TPACPI_THERMAL_ACPI_TMP07:
6329                 if (idx <= 7) {
6330                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6331                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6332                                 return -EIO;
6333                         if (t > 127 || t < -127)
6334                                 t = TP_EC_THERMAL_TMP_NA;
6335                         *value = t * 1000;
6336                         return 0;
6337                 }
6338                 break;
6339
6340         case TPACPI_THERMAL_NONE:
6341         default:
6342                 return -ENOSYS;
6343         }
6344
6345         return -EINVAL;
6346 }
6347
6348 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6349 {
6350         int res, i;
6351         int n;
6352
6353         n = 8;
6354         i = 0;
6355
6356         if (!s)
6357                 return -EINVAL;
6358
6359         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6360                 n = 16;
6361
6362         for (i = 0 ; i < n; i++) {
6363                 res = thermal_get_sensor(i, &s->temp[i]);
6364                 if (res)
6365                         return res;
6366         }
6367
6368         return n;
6369 }
6370
6371 static void thermal_dump_all_sensors(void)
6372 {
6373         int n, i;
6374         struct ibm_thermal_sensors_struct t;
6375
6376         n = thermal_get_sensors(&t);
6377         if (n <= 0)
6378                 return;
6379
6380         pr_notice("temperatures (Celsius):");
6381
6382         for (i = 0; i < n; i++) {
6383                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6384                         pr_cont(" %d", (int)(t.temp[i] / 1000));
6385                 else
6386                         pr_cont(" N/A");
6387         }
6388
6389         pr_cont("\n");
6390 }
6391
6392 /* sysfs temp##_input -------------------------------------------------- */
6393
6394 static ssize_t thermal_temp_input_show(struct device *dev,
6395                            struct device_attribute *attr,
6396                            char *buf)
6397 {
6398         struct sensor_device_attribute *sensor_attr =
6399                                         to_sensor_dev_attr(attr);
6400         int idx = sensor_attr->index;
6401         s32 value;
6402         int res;
6403
6404         res = thermal_get_sensor(idx, &value);
6405         if (res)
6406                 return res;
6407         if (value == TPACPI_THERMAL_SENSOR_NA)
6408                 return -ENXIO;
6409
6410         return snprintf(buf, PAGE_SIZE, "%d\n", value);
6411 }
6412
6413 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6414          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6415                      thermal_temp_input_show, NULL, _idxB)
6416
6417 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6418         THERMAL_SENSOR_ATTR_TEMP(1, 0),
6419         THERMAL_SENSOR_ATTR_TEMP(2, 1),
6420         THERMAL_SENSOR_ATTR_TEMP(3, 2),
6421         THERMAL_SENSOR_ATTR_TEMP(4, 3),
6422         THERMAL_SENSOR_ATTR_TEMP(5, 4),
6423         THERMAL_SENSOR_ATTR_TEMP(6, 5),
6424         THERMAL_SENSOR_ATTR_TEMP(7, 6),
6425         THERMAL_SENSOR_ATTR_TEMP(8, 7),
6426         THERMAL_SENSOR_ATTR_TEMP(9, 8),
6427         THERMAL_SENSOR_ATTR_TEMP(10, 9),
6428         THERMAL_SENSOR_ATTR_TEMP(11, 10),
6429         THERMAL_SENSOR_ATTR_TEMP(12, 11),
6430         THERMAL_SENSOR_ATTR_TEMP(13, 12),
6431         THERMAL_SENSOR_ATTR_TEMP(14, 13),
6432         THERMAL_SENSOR_ATTR_TEMP(15, 14),
6433         THERMAL_SENSOR_ATTR_TEMP(16, 15),
6434 };
6435
6436 #define THERMAL_ATTRS(X) \
6437         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6438
6439 static struct attribute *thermal_temp_input_attr[] = {
6440         THERMAL_ATTRS(8),
6441         THERMAL_ATTRS(9),
6442         THERMAL_ATTRS(10),
6443         THERMAL_ATTRS(11),
6444         THERMAL_ATTRS(12),
6445         THERMAL_ATTRS(13),
6446         THERMAL_ATTRS(14),
6447         THERMAL_ATTRS(15),
6448         THERMAL_ATTRS(0),
6449         THERMAL_ATTRS(1),
6450         THERMAL_ATTRS(2),
6451         THERMAL_ATTRS(3),
6452         THERMAL_ATTRS(4),
6453         THERMAL_ATTRS(5),
6454         THERMAL_ATTRS(6),
6455         THERMAL_ATTRS(7),
6456         NULL
6457 };
6458
6459 static const struct attribute_group thermal_temp_input16_group = {
6460         .attrs = thermal_temp_input_attr
6461 };
6462
6463 static const struct attribute_group thermal_temp_input8_group = {
6464         .attrs = &thermal_temp_input_attr[8]
6465 };
6466
6467 #undef THERMAL_SENSOR_ATTR_TEMP
6468 #undef THERMAL_ATTRS
6469
6470 /* --------------------------------------------------------------------- */
6471
6472 static int __init thermal_init(struct ibm_init_struct *iibm)
6473 {
6474         u8 t, ta1, ta2;
6475         int i;
6476         int acpi_tmp7;
6477         int res;
6478
6479         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6480
6481         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6482
6483         if (thinkpad_id.ec_model) {
6484                 /*
6485                  * Direct EC access mode: sensors at registers
6486                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6487                  * non-implemented, thermal sensors return 0x80 when
6488                  * not available
6489                  */
6490
6491                 ta1 = ta2 = 0;
6492                 for (i = 0; i < 8; i++) {
6493                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6494                                 ta1 |= t;
6495                         } else {
6496                                 ta1 = 0;
6497                                 break;
6498                         }
6499                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6500                                 ta2 |= t;
6501                         } else {
6502                                 ta1 = 0;
6503                                 break;
6504                         }
6505                 }
6506                 if (ta1 == 0) {
6507                         /* This is sheer paranoia, but we handle it anyway */
6508                         if (acpi_tmp7) {
6509                                 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6510                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6511                         } else {
6512                                 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6513                                 thermal_read_mode = TPACPI_THERMAL_NONE;
6514                         }
6515                 } else {
6516                         thermal_read_mode =
6517                             (ta2 != 0) ?
6518                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6519                 }
6520         } else if (acpi_tmp7) {
6521                 if (tpacpi_is_ibm() &&
6522                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6523                         /* 600e/x, 770e, 770x */
6524                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6525                 } else {
6526                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6527                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6528                 }
6529         } else {
6530                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6531                 thermal_read_mode = TPACPI_THERMAL_NONE;
6532         }
6533
6534         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6535                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6536                 thermal_read_mode);
6537
6538         switch (thermal_read_mode) {
6539         case TPACPI_THERMAL_TPEC_16:
6540                 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6541                                 &thermal_temp_input16_group);
6542                 if (res)
6543                         return res;
6544                 break;
6545         case TPACPI_THERMAL_TPEC_8:
6546         case TPACPI_THERMAL_ACPI_TMP07:
6547         case TPACPI_THERMAL_ACPI_UPDT:
6548                 res = sysfs_create_group(&tpacpi_hwmon->kobj,
6549                                 &thermal_temp_input8_group);
6550                 if (res)
6551                         return res;
6552                 break;
6553         case TPACPI_THERMAL_NONE:
6554         default:
6555                 return 1;
6556         }
6557
6558         return 0;
6559 }
6560
6561 static void thermal_exit(void)
6562 {
6563         switch (thermal_read_mode) {
6564         case TPACPI_THERMAL_TPEC_16:
6565                 sysfs_remove_group(&tpacpi_hwmon->kobj,
6566                                    &thermal_temp_input16_group);
6567                 break;
6568         case TPACPI_THERMAL_TPEC_8:
6569         case TPACPI_THERMAL_ACPI_TMP07:
6570         case TPACPI_THERMAL_ACPI_UPDT:
6571                 sysfs_remove_group(&tpacpi_hwmon->kobj,
6572                                    &thermal_temp_input8_group);
6573                 break;
6574         case TPACPI_THERMAL_NONE:
6575         default:
6576                 break;
6577         }
6578 }
6579
6580 static int thermal_read(struct seq_file *m)
6581 {
6582         int n, i;
6583         struct ibm_thermal_sensors_struct t;
6584
6585         n = thermal_get_sensors(&t);
6586         if (unlikely(n < 0))
6587                 return n;
6588
6589         seq_printf(m, "temperatures:\t");
6590
6591         if (n > 0) {
6592                 for (i = 0; i < (n - 1); i++)
6593                         seq_printf(m, "%d ", t.temp[i] / 1000);
6594                 seq_printf(m, "%d\n", t.temp[i] / 1000);
6595         } else
6596                 seq_printf(m, "not supported\n");
6597
6598         return 0;
6599 }
6600
6601 static struct ibm_struct thermal_driver_data = {
6602         .name = "thermal",
6603         .read = thermal_read,
6604         .exit = thermal_exit,
6605 };
6606
6607 /*************************************************************************
6608  * Backlight/brightness subdriver
6609  */
6610
6611 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6612
6613 /*
6614  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6615  * CMOS NVRAM byte 0x5E, bits 0-3.
6616  *
6617  * EC HBRV (0x31) has the following layout
6618  *   Bit 7: unknown function
6619  *   Bit 6: unknown function
6620  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6621  *   Bit 4: must be set to zero to avoid problems
6622  *   Bit 3-0: backlight brightness level
6623  *
6624  * brightness_get_raw returns status data in the HBRV layout
6625  *
6626  * WARNING: The X61 has been verified to use HBRV for something else, so
6627  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6628  * testing on the very early *60 Lenovo models...
6629  */
6630
6631 enum {
6632         TP_EC_BACKLIGHT = 0x31,
6633
6634         /* TP_EC_BACKLIGHT bitmasks */
6635         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6636         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6637         TP_EC_BACKLIGHT_MAPSW = 0x20,
6638 };
6639
6640 enum tpacpi_brightness_access_mode {
6641         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
6642         TPACPI_BRGHT_MODE_EC,           /* EC control */
6643         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
6644         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
6645         TPACPI_BRGHT_MODE_MAX
6646 };
6647
6648 static struct backlight_device *ibm_backlight_device;
6649
6650 static enum tpacpi_brightness_access_mode brightness_mode =
6651                 TPACPI_BRGHT_MODE_MAX;
6652
6653 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6654
6655 static struct mutex brightness_mutex;
6656
6657 /* NVRAM brightness access,
6658  * call with brightness_mutex held! */
6659 static unsigned int tpacpi_brightness_nvram_get(void)
6660 {
6661         u8 lnvram;
6662
6663         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6664                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6665                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6666         lnvram &= bright_maxlvl;
6667
6668         return lnvram;
6669 }
6670
6671 static void tpacpi_brightness_checkpoint_nvram(void)
6672 {
6673         u8 lec = 0;
6674         u8 b_nvram;
6675
6676         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6677                 return;
6678
6679         vdbg_printk(TPACPI_DBG_BRGHT,
6680                 "trying to checkpoint backlight level to NVRAM...\n");
6681
6682         if (mutex_lock_killable(&brightness_mutex) < 0)
6683                 return;
6684
6685         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6686                 goto unlock;
6687         lec &= TP_EC_BACKLIGHT_LVLMSK;
6688         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6689
6690         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6691                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6692                 /* NVRAM needs update */
6693                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6694                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6695                 b_nvram |= lec;
6696                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6697                 dbg_printk(TPACPI_DBG_BRGHT,
6698                            "updated NVRAM backlight level to %u (0x%02x)\n",
6699                            (unsigned int) lec, (unsigned int) b_nvram);
6700         } else
6701                 vdbg_printk(TPACPI_DBG_BRGHT,
6702                            "NVRAM backlight level already is %u (0x%02x)\n",
6703                            (unsigned int) lec, (unsigned int) b_nvram);
6704
6705 unlock:
6706         mutex_unlock(&brightness_mutex);
6707 }
6708
6709
6710 /* call with brightness_mutex held! */
6711 static int tpacpi_brightness_get_raw(int *status)
6712 {
6713         u8 lec = 0;
6714
6715         switch (brightness_mode) {
6716         case TPACPI_BRGHT_MODE_UCMS_STEP:
6717                 *status = tpacpi_brightness_nvram_get();
6718                 return 0;
6719         case TPACPI_BRGHT_MODE_EC:
6720         case TPACPI_BRGHT_MODE_ECNVRAM:
6721                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6722                         return -EIO;
6723                 *status = lec;
6724                 return 0;
6725         default:
6726                 return -ENXIO;
6727         }
6728 }
6729
6730 /* call with brightness_mutex held! */
6731 /* do NOT call with illegal backlight level value */
6732 static int tpacpi_brightness_set_ec(unsigned int value)
6733 {
6734         u8 lec = 0;
6735
6736         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6737                 return -EIO;
6738
6739         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6740                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6741                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6742                 return -EIO;
6743
6744         return 0;
6745 }
6746
6747 /* call with brightness_mutex held! */
6748 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6749 {
6750         int cmos_cmd, inc;
6751         unsigned int current_value, i;
6752
6753         current_value = tpacpi_brightness_nvram_get();
6754
6755         if (value == current_value)
6756                 return 0;
6757
6758         cmos_cmd = (value > current_value) ?
6759                         TP_CMOS_BRIGHTNESS_UP :
6760                         TP_CMOS_BRIGHTNESS_DOWN;
6761         inc = (value > current_value) ? 1 : -1;
6762
6763         for (i = current_value; i != value; i += inc)
6764                 if (issue_thinkpad_cmos_command(cmos_cmd))
6765                         return -EIO;
6766
6767         return 0;
6768 }
6769
6770 /* May return EINTR which can always be mapped to ERESTARTSYS */
6771 static int brightness_set(unsigned int value)
6772 {
6773         int res;
6774
6775         if (value > bright_maxlvl)
6776                 return -EINVAL;
6777
6778         vdbg_printk(TPACPI_DBG_BRGHT,
6779                         "set backlight level to %d\n", value);
6780
6781         res = mutex_lock_killable(&brightness_mutex);
6782         if (res < 0)
6783                 return res;
6784
6785         switch (brightness_mode) {
6786         case TPACPI_BRGHT_MODE_EC:
6787         case TPACPI_BRGHT_MODE_ECNVRAM:
6788                 res = tpacpi_brightness_set_ec(value);
6789                 break;
6790         case TPACPI_BRGHT_MODE_UCMS_STEP:
6791                 res = tpacpi_brightness_set_ucmsstep(value);
6792                 break;
6793         default:
6794                 res = -ENXIO;
6795         }
6796
6797         mutex_unlock(&brightness_mutex);
6798         return res;
6799 }
6800
6801 /* sysfs backlight class ----------------------------------------------- */
6802
6803 static int brightness_update_status(struct backlight_device *bd)
6804 {
6805         unsigned int level =
6806                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6807                  bd->props.power == FB_BLANK_UNBLANK) ?
6808                                 bd->props.brightness : 0;
6809
6810         dbg_printk(TPACPI_DBG_BRGHT,
6811                         "backlight: attempt to set level to %d\n",
6812                         level);
6813
6814         /* it is the backlight class's job (caller) to handle
6815          * EINTR and other errors properly */
6816         return brightness_set(level);
6817 }
6818
6819 static int brightness_get(struct backlight_device *bd)
6820 {
6821         int status, res;
6822
6823         res = mutex_lock_killable(&brightness_mutex);
6824         if (res < 0)
6825                 return 0;
6826
6827         res = tpacpi_brightness_get_raw(&status);
6828
6829         mutex_unlock(&brightness_mutex);
6830
6831         if (res < 0)
6832                 return 0;
6833
6834         return status & TP_EC_BACKLIGHT_LVLMSK;
6835 }
6836
6837 static void tpacpi_brightness_notify_change(void)
6838 {
6839         backlight_force_update(ibm_backlight_device,
6840                                BACKLIGHT_UPDATE_HOTKEY);
6841 }
6842
6843 static const struct backlight_ops ibm_backlight_data = {
6844         .get_brightness = brightness_get,
6845         .update_status  = brightness_update_status,
6846 };
6847
6848 /* --------------------------------------------------------------------- */
6849
6850 /*
6851  * Call _BCL method of video device.  On some ThinkPads this will
6852  * switch the firmware to the ACPI brightness control mode.
6853  */
6854
6855 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6856 {
6857         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6858         union acpi_object *obj;
6859         struct acpi_device *device, *child;
6860         int rc;
6861
6862         if (acpi_bus_get_device(handle, &device))
6863                 return 0;
6864
6865         rc = 0;
6866         list_for_each_entry(child, &device->children, node) {
6867                 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6868                                                           NULL, &buffer);
6869                 if (ACPI_FAILURE(status))
6870                         continue;
6871
6872                 obj = (union acpi_object *)buffer.pointer;
6873                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6874                         pr_err("Unknown _BCL data, please report this to %s\n",
6875                                 TPACPI_MAIL);
6876                         rc = 0;
6877                 } else {
6878                         rc = obj->package.count;
6879                 }
6880                 break;
6881         }
6882
6883         kfree(buffer.pointer);
6884         return rc;
6885 }
6886
6887
6888 /*
6889  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6890  */
6891 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6892 {
6893         acpi_handle video_device;
6894         int bcl_levels = 0;
6895
6896         tpacpi_acpi_handle_locate("video", NULL, &video_device);
6897         if (video_device)
6898                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6899
6900         tp_features.bright_acpimode = (bcl_levels > 0);
6901
6902         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6903 }
6904
6905 /*
6906  * These are only useful for models that have only one possibility
6907  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6908  * these quirks.
6909  */
6910 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6911 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6912 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6913
6914 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6915         /* Models with ATI GPUs known to require ECNVRAM mode */
6916         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6917
6918         /* Models with ATI GPUs that can use ECNVRAM */
6919         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6920         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6921         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6922         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6923
6924         /* Models with Intel Extreme Graphics 2 */
6925         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6926         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6927         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6928
6929         /* Models with Intel GMA900 */
6930         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6931         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6932         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6933 };
6934
6935 /*
6936  * Returns < 0 for error, otherwise sets tp_features.bright_*
6937  * and bright_maxlvl.
6938  */
6939 static void __init tpacpi_detect_brightness_capabilities(void)
6940 {
6941         unsigned int b;
6942
6943         vdbg_printk(TPACPI_DBG_INIT,
6944                     "detecting firmware brightness interface capabilities\n");
6945
6946         /* we could run a quirks check here (same table used by
6947          * brightness_init) if needed */
6948
6949         /*
6950          * We always attempt to detect acpi support, so as to switch
6951          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6952          * going to publish a backlight interface
6953          */
6954         b = tpacpi_check_std_acpi_brightness_support();
6955         switch (b) {
6956         case 16:
6957                 bright_maxlvl = 15;
6958                 break;
6959         case 8:
6960         case 0:
6961                 bright_maxlvl = 7;
6962                 break;
6963         default:
6964                 tp_features.bright_unkfw = 1;
6965                 bright_maxlvl = b - 1;
6966         }
6967         pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6968 }
6969
6970 static int __init brightness_init(struct ibm_init_struct *iibm)
6971 {
6972         struct backlight_properties props;
6973         int b;
6974         unsigned long quirks;
6975
6976         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6977
6978         mutex_init(&brightness_mutex);
6979
6980         quirks = tpacpi_check_quirks(brightness_quirk_table,
6981                                 ARRAY_SIZE(brightness_quirk_table));
6982
6983         /* tpacpi_detect_brightness_capabilities() must have run already */
6984
6985         /* if it is unknown, we don't handle it: it wouldn't be safe */
6986         if (tp_features.bright_unkfw)
6987                 return 1;
6988
6989         if (!brightness_enable) {
6990                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6991                            "brightness support disabled by module parameter\n");
6992                 return 1;
6993         }
6994
6995         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6996                 if (brightness_enable > 1) {
6997                         pr_info("Standard ACPI backlight interface available, not loading native one\n");
6998                         return 1;
6999                 } else if (brightness_enable == 1) {
7000                         pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
7001                         return 1;
7002                 }
7003         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
7004                 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n");
7005         }
7006
7007         /*
7008          * Check for module parameter bogosity, note that we
7009          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
7010          * able to detect "unspecified"
7011          */
7012         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
7013                 return -EINVAL;
7014
7015         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7016         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7017             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7018                 if (quirks & TPACPI_BRGHT_Q_EC)
7019                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7020                 else
7021                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7022
7023                 dbg_printk(TPACPI_DBG_BRGHT,
7024                            "driver auto-selected brightness_mode=%d\n",
7025                            brightness_mode);
7026         }
7027
7028         /* Safety */
7029         if (!tpacpi_is_ibm() &&
7030             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7031              brightness_mode == TPACPI_BRGHT_MODE_EC))
7032                 return -EINVAL;
7033
7034         if (tpacpi_brightness_get_raw(&b) < 0)
7035                 return 1;
7036
7037         memset(&props, 0, sizeof(struct backlight_properties));
7038         props.type = BACKLIGHT_PLATFORM;
7039         props.max_brightness = bright_maxlvl;
7040         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7041         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7042                                                          NULL, NULL,
7043                                                          &ibm_backlight_data,
7044                                                          &props);
7045         if (IS_ERR(ibm_backlight_device)) {
7046                 int rc = PTR_ERR(ibm_backlight_device);
7047                 ibm_backlight_device = NULL;
7048                 pr_err("Could not register backlight device\n");
7049                 return rc;
7050         }
7051         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7052                         "brightness is supported\n");
7053
7054         if (quirks & TPACPI_BRGHT_Q_ASK) {
7055                 pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7056                           brightness_mode);
7057                 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7058                           TPACPI_MAIL);
7059         }
7060
7061         /* Added by mistake in early 2007.  Probably useless, but it could
7062          * be working around some unknown firmware problem where the value
7063          * read at startup doesn't match the real hardware state... so leave
7064          * it in place just in case */
7065         backlight_update_status(ibm_backlight_device);
7066
7067         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7068                     "brightness: registering brightness hotkeys as change notification\n");
7069         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7070                                 | TP_ACPI_HKEY_BRGHTUP_MASK
7071                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
7072         return 0;
7073 }
7074
7075 static void brightness_suspend(void)
7076 {
7077         tpacpi_brightness_checkpoint_nvram();
7078 }
7079
7080 static void brightness_shutdown(void)
7081 {
7082         tpacpi_brightness_checkpoint_nvram();
7083 }
7084
7085 static void brightness_exit(void)
7086 {
7087         if (ibm_backlight_device) {
7088                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7089                             "calling backlight_device_unregister()\n");
7090                 backlight_device_unregister(ibm_backlight_device);
7091         }
7092
7093         tpacpi_brightness_checkpoint_nvram();
7094 }
7095
7096 static int brightness_read(struct seq_file *m)
7097 {
7098         int level;
7099
7100         level = brightness_get(NULL);
7101         if (level < 0) {
7102                 seq_printf(m, "level:\t\tunreadable\n");
7103         } else {
7104                 seq_printf(m, "level:\t\t%d\n", level);
7105                 seq_printf(m, "commands:\tup, down\n");
7106                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7107                                bright_maxlvl);
7108         }
7109
7110         return 0;
7111 }
7112
7113 static int brightness_write(char *buf)
7114 {
7115         int level;
7116         int rc;
7117         char *cmd;
7118
7119         level = brightness_get(NULL);
7120         if (level < 0)
7121                 return level;
7122
7123         while ((cmd = next_cmd(&buf))) {
7124                 if (strlencmp(cmd, "up") == 0) {
7125                         if (level < bright_maxlvl)
7126                                 level++;
7127                 } else if (strlencmp(cmd, "down") == 0) {
7128                         if (level > 0)
7129                                 level--;
7130                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
7131                            level >= 0 && level <= bright_maxlvl) {
7132                         /* new level set */
7133                 } else
7134                         return -EINVAL;
7135         }
7136
7137         tpacpi_disclose_usertask("procfs brightness",
7138                         "set level to %d\n", level);
7139
7140         /*
7141          * Now we know what the final level should be, so we try to set it.
7142          * Doing it this way makes the syscall restartable in case of EINTR
7143          */
7144         rc = brightness_set(level);
7145         if (!rc && ibm_backlight_device)
7146                 backlight_force_update(ibm_backlight_device,
7147                                         BACKLIGHT_UPDATE_SYSFS);
7148         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7149 }
7150
7151 static struct ibm_struct brightness_driver_data = {
7152         .name = "brightness",
7153         .read = brightness_read,
7154         .write = brightness_write,
7155         .exit = brightness_exit,
7156         .suspend = brightness_suspend,
7157         .shutdown = brightness_shutdown,
7158 };
7159
7160 /*************************************************************************
7161  * Volume subdriver
7162  */
7163
7164 /*
7165  * IBM ThinkPads have a simple volume controller with MUTE gating.
7166  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7167  *
7168  * Since the *61 series (and probably also the later *60 series), Lenovo
7169  * ThinkPads only implement the MUTE gate.
7170  *
7171  * EC register 0x30
7172  *   Bit 6: MUTE (1 mutes sound)
7173  *   Bit 3-0: Volume
7174  *   Other bits should be zero as far as we know.
7175  *
7176  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7177  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
7178  * such as bit 7 which is used to detect repeated presses of MUTE,
7179  * and we leave them unchanged.
7180  *
7181  * On newer Lenovo ThinkPads, the EC can automatically change the volume
7182  * in response to user input.  Unfortunately, this rarely works well.
7183  * The laptop changes the state of its internal MUTE gate and, on some
7184  * models, sends KEY_MUTE, causing any user code that responds to the
7185  * mute button to get confused.  The hardware MUTE gate is also
7186  * unnecessary, since user code can handle the mute button without
7187  * kernel or EC help.
7188  *
7189  * To avoid confusing userspace, we simply disable all EC-based mute
7190  * and volume controls when possible.
7191  */
7192
7193 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7194
7195 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
7196 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7197 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7198
7199 #if SNDRV_CARDS <= 32
7200 #define DEFAULT_ALSA_IDX                ~((1 << (SNDRV_CARDS - 3)) - 1)
7201 #else
7202 #define DEFAULT_ALSA_IDX                ~((1 << (32 - 3)) - 1)
7203 #endif
7204 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7205 static char *alsa_id = "ThinkPadEC";
7206 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7207
7208 struct tpacpi_alsa_data {
7209         struct snd_card *card;
7210         struct snd_ctl_elem_id *ctl_mute_id;
7211         struct snd_ctl_elem_id *ctl_vol_id;
7212 };
7213
7214 static struct snd_card *alsa_card;
7215
7216 enum {
7217         TP_EC_AUDIO = 0x30,
7218
7219         /* TP_EC_AUDIO bits */
7220         TP_EC_AUDIO_MUTESW = 6,
7221
7222         /* TP_EC_AUDIO bitmasks */
7223         TP_EC_AUDIO_LVL_MSK = 0x0F,
7224         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7225
7226         /* Maximum volume */
7227         TP_EC_VOLUME_MAX = 14,
7228 };
7229
7230 enum tpacpi_volume_access_mode {
7231         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
7232         TPACPI_VOL_MODE_EC,             /* Pure EC control */
7233         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
7234         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
7235         TPACPI_VOL_MODE_MAX
7236 };
7237
7238 enum tpacpi_volume_capabilities {
7239         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
7240         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
7241         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
7242         TPACPI_VOL_CAP_MAX
7243 };
7244
7245 enum tpacpi_mute_btn_mode {
7246         TP_EC_MUTE_BTN_LATCH  = 0,      /* Mute mutes; up/down unmutes */
7247         /* We don't know what mode 1 is. */
7248         TP_EC_MUTE_BTN_NONE   = 2,      /* Mute and up/down are just keys */
7249         TP_EC_MUTE_BTN_TOGGLE = 3,      /* Mute toggles; up/down unmutes */
7250 };
7251
7252 static enum tpacpi_volume_access_mode volume_mode =
7253         TPACPI_VOL_MODE_MAX;
7254
7255 static enum tpacpi_volume_capabilities volume_capabilities;
7256 static bool volume_control_allowed;
7257 static bool software_mute_requested = true;
7258 static bool software_mute_active;
7259 static int software_mute_orig_mode;
7260
7261 /*
7262  * Used to syncronize writers to TP_EC_AUDIO and
7263  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7264  */
7265 static struct mutex volume_mutex;
7266
7267 static void tpacpi_volume_checkpoint_nvram(void)
7268 {
7269         u8 lec = 0;
7270         u8 b_nvram;
7271         u8 ec_mask;
7272
7273         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7274                 return;
7275         if (!volume_control_allowed)
7276                 return;
7277         if (software_mute_active)
7278                 return;
7279
7280         vdbg_printk(TPACPI_DBG_MIXER,
7281                 "trying to checkpoint mixer state to NVRAM...\n");
7282
7283         if (tp_features.mixer_no_level_control)
7284                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7285         else
7286                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7287
7288         if (mutex_lock_killable(&volume_mutex) < 0)
7289                 return;
7290
7291         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7292                 goto unlock;
7293         lec &= ec_mask;
7294         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7295
7296         if (lec != (b_nvram & ec_mask)) {
7297                 /* NVRAM needs update */
7298                 b_nvram &= ~ec_mask;
7299                 b_nvram |= lec;
7300                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7301                 dbg_printk(TPACPI_DBG_MIXER,
7302                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7303                            (unsigned int) lec, (unsigned int) b_nvram);
7304         } else {
7305                 vdbg_printk(TPACPI_DBG_MIXER,
7306                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7307                            (unsigned int) lec, (unsigned int) b_nvram);
7308         }
7309
7310 unlock:
7311         mutex_unlock(&volume_mutex);
7312 }
7313
7314 static int volume_get_status_ec(u8 *status)
7315 {
7316         u8 s;
7317
7318         if (!acpi_ec_read(TP_EC_AUDIO, &s))
7319                 return -EIO;
7320
7321         *status = s;
7322
7323         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7324
7325         return 0;
7326 }
7327
7328 static int volume_get_status(u8 *status)
7329 {
7330         return volume_get_status_ec(status);
7331 }
7332
7333 static int volume_set_status_ec(const u8 status)
7334 {
7335         if (!acpi_ec_write(TP_EC_AUDIO, status))
7336                 return -EIO;
7337
7338         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7339
7340         /*
7341          * On X200s, and possibly on others, it can take a while for
7342          * reads to become correct.
7343          */
7344         msleep(1);
7345
7346         return 0;
7347 }
7348
7349 static int volume_set_status(const u8 status)
7350 {
7351         return volume_set_status_ec(status);
7352 }
7353
7354 /* returns < 0 on error, 0 on no change, 1 on change */
7355 static int __volume_set_mute_ec(const bool mute)
7356 {
7357         int rc;
7358         u8 s, n;
7359
7360         if (mutex_lock_killable(&volume_mutex) < 0)
7361                 return -EINTR;
7362
7363         rc = volume_get_status_ec(&s);
7364         if (rc)
7365                 goto unlock;
7366
7367         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7368                      s & ~TP_EC_AUDIO_MUTESW_MSK;
7369
7370         if (n != s) {
7371                 rc = volume_set_status_ec(n);
7372                 if (!rc)
7373                         rc = 1;
7374         }
7375
7376 unlock:
7377         mutex_unlock(&volume_mutex);
7378         return rc;
7379 }
7380
7381 static int volume_alsa_set_mute(const bool mute)
7382 {
7383         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7384                    (mute) ? "" : "un");
7385         return __volume_set_mute_ec(mute);
7386 }
7387
7388 static int volume_set_mute(const bool mute)
7389 {
7390         int rc;
7391
7392         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7393                    (mute) ? "" : "un");
7394
7395         rc = __volume_set_mute_ec(mute);
7396         return (rc < 0) ? rc : 0;
7397 }
7398
7399 /* returns < 0 on error, 0 on no change, 1 on change */
7400 static int __volume_set_volume_ec(const u8 vol)
7401 {
7402         int rc;
7403         u8 s, n;
7404
7405         if (vol > TP_EC_VOLUME_MAX)
7406                 return -EINVAL;
7407
7408         if (mutex_lock_killable(&volume_mutex) < 0)
7409                 return -EINTR;
7410
7411         rc = volume_get_status_ec(&s);
7412         if (rc)
7413                 goto unlock;
7414
7415         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7416
7417         if (n != s) {
7418                 rc = volume_set_status_ec(n);
7419                 if (!rc)
7420                         rc = 1;
7421         }
7422
7423 unlock:
7424         mutex_unlock(&volume_mutex);
7425         return rc;
7426 }
7427
7428 static int volume_set_software_mute(bool startup)
7429 {
7430         int result;
7431
7432         if (!tpacpi_is_lenovo())
7433                 return -ENODEV;
7434
7435         if (startup) {
7436                 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7437                                 "HAUM", "qd"))
7438                         return -EIO;
7439
7440                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7441                             "Initial HAUM setting was %d\n",
7442                             software_mute_orig_mode);
7443         }
7444
7445         if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7446                         (int)TP_EC_MUTE_BTN_NONE))
7447                 return -EIO;
7448
7449         if (result != TP_EC_MUTE_BTN_NONE)
7450                 pr_warn("Unexpected SAUM result %d\n",
7451                         result);
7452
7453         /*
7454          * In software mute mode, the standard codec controls take
7455          * precendence, so we unmute the ThinkPad HW switch at
7456          * startup.  Just on case there are SAUM-capable ThinkPads
7457          * with level controls, set max HW volume as well.
7458          */
7459         if (tp_features.mixer_no_level_control)
7460                 result = volume_set_mute(false);
7461         else
7462                 result = volume_set_status(TP_EC_VOLUME_MAX);
7463
7464         if (result != 0)
7465                 pr_warn("Failed to unmute the HW mute switch\n");
7466
7467         return 0;
7468 }
7469
7470 static void volume_exit_software_mute(void)
7471 {
7472         int r;
7473
7474         if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7475             || r != software_mute_orig_mode)
7476                 pr_warn("Failed to restore mute mode\n");
7477 }
7478
7479 static int volume_alsa_set_volume(const u8 vol)
7480 {
7481         dbg_printk(TPACPI_DBG_MIXER,
7482                    "ALSA: trying to set volume level to %hu\n", vol);
7483         return __volume_set_volume_ec(vol);
7484 }
7485
7486 static void volume_alsa_notify_change(void)
7487 {
7488         struct tpacpi_alsa_data *d;
7489
7490         if (alsa_card && alsa_card->private_data) {
7491                 d = alsa_card->private_data;
7492                 if (d->ctl_mute_id)
7493                         snd_ctl_notify(alsa_card,
7494                                         SNDRV_CTL_EVENT_MASK_VALUE,
7495                                         d->ctl_mute_id);
7496                 if (d->ctl_vol_id)
7497                         snd_ctl_notify(alsa_card,
7498                                         SNDRV_CTL_EVENT_MASK_VALUE,
7499                                         d->ctl_vol_id);
7500         }
7501 }
7502
7503 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7504                                 struct snd_ctl_elem_info *uinfo)
7505 {
7506         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7507         uinfo->count = 1;
7508         uinfo->value.integer.min = 0;
7509         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7510         return 0;
7511 }
7512
7513 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7514                                 struct snd_ctl_elem_value *ucontrol)
7515 {
7516         u8 s;
7517         int rc;
7518
7519         rc = volume_get_status(&s);
7520         if (rc < 0)
7521                 return rc;
7522
7523         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7524         return 0;
7525 }
7526
7527 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7528                                 struct snd_ctl_elem_value *ucontrol)
7529 {
7530         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7531                                  ucontrol->value.integer.value[0]);
7532         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7533 }
7534
7535 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7536
7537 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7538                                 struct snd_ctl_elem_value *ucontrol)
7539 {
7540         u8 s;
7541         int rc;
7542
7543         rc = volume_get_status(&s);
7544         if (rc < 0)
7545                 return rc;
7546
7547         ucontrol->value.integer.value[0] =
7548                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7549         return 0;
7550 }
7551
7552 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7553                                 struct snd_ctl_elem_value *ucontrol)
7554 {
7555         tpacpi_disclose_usertask("ALSA", "%smute\n",
7556                                  ucontrol->value.integer.value[0] ?
7557                                         "un" : "");
7558         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7559 }
7560
7561 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7562         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7563         .name = "Console Playback Volume",
7564         .index = 0,
7565         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7566         .info = volume_alsa_vol_info,
7567         .get = volume_alsa_vol_get,
7568 };
7569
7570 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7571         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7572         .name = "Console Playback Switch",
7573         .index = 0,
7574         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7575         .info = volume_alsa_mute_info,
7576         .get = volume_alsa_mute_get,
7577 };
7578
7579 static void volume_suspend(void)
7580 {
7581         tpacpi_volume_checkpoint_nvram();
7582 }
7583
7584 static void volume_resume(void)
7585 {
7586         if (software_mute_active) {
7587                 if (volume_set_software_mute(false) < 0)
7588                         pr_warn("Failed to restore software mute\n");
7589         } else {
7590                 volume_alsa_notify_change();
7591         }
7592 }
7593
7594 static void volume_shutdown(void)
7595 {
7596         tpacpi_volume_checkpoint_nvram();
7597 }
7598
7599 static void volume_exit(void)
7600 {
7601         if (alsa_card) {
7602                 snd_card_free(alsa_card);
7603                 alsa_card = NULL;
7604         }
7605
7606         tpacpi_volume_checkpoint_nvram();
7607
7608         if (software_mute_active)
7609                 volume_exit_software_mute();
7610 }
7611
7612 static int __init volume_create_alsa_mixer(void)
7613 {
7614         struct snd_card *card;
7615         struct tpacpi_alsa_data *data;
7616         struct snd_kcontrol *ctl_vol;
7617         struct snd_kcontrol *ctl_mute;
7618         int rc;
7619
7620         rc = snd_card_new(&tpacpi_pdev->dev,
7621                           alsa_index, alsa_id, THIS_MODULE,
7622                           sizeof(struct tpacpi_alsa_data), &card);
7623         if (rc < 0 || !card) {
7624                 pr_err("Failed to create ALSA card structures: %d\n", rc);
7625                 return 1;
7626         }
7627
7628         BUG_ON(!card->private_data);
7629         data = card->private_data;
7630         data->card = card;
7631
7632         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7633                 sizeof(card->driver));
7634         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7635                 sizeof(card->shortname));
7636         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7637                  (thinkpad_id.ec_version_str) ?
7638                         thinkpad_id.ec_version_str : "(unknown)");
7639         snprintf(card->longname, sizeof(card->longname),
7640                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7641                  (thinkpad_id.ec_version_str) ?
7642                         thinkpad_id.ec_version_str : "unknown");
7643
7644         if (volume_control_allowed) {
7645                 volume_alsa_control_vol.put = volume_alsa_vol_put;
7646                 volume_alsa_control_vol.access =
7647                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7648
7649                 volume_alsa_control_mute.put = volume_alsa_mute_put;
7650                 volume_alsa_control_mute.access =
7651                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7652         }
7653
7654         if (!tp_features.mixer_no_level_control) {
7655                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7656                 rc = snd_ctl_add(card, ctl_vol);
7657                 if (rc < 0) {
7658                         pr_err("Failed to create ALSA volume control: %d\n",
7659                                rc);
7660                         goto err_exit;
7661                 }
7662                 data->ctl_vol_id = &ctl_vol->id;
7663         }
7664
7665         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7666         rc = snd_ctl_add(card, ctl_mute);
7667         if (rc < 0) {
7668                 pr_err("Failed to create ALSA mute control: %d\n", rc);
7669                 goto err_exit;
7670         }
7671         data->ctl_mute_id = &ctl_mute->id;
7672
7673         rc = snd_card_register(card);
7674         if (rc < 0) {
7675                 pr_err("Failed to register ALSA card: %d\n", rc);
7676                 goto err_exit;
7677         }
7678
7679         alsa_card = card;
7680         return 0;
7681
7682 err_exit:
7683         snd_card_free(card);
7684         return 1;
7685 }
7686
7687 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
7688 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
7689
7690 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7691         /* Whitelist volume level on all IBM by default */
7692         { .vendor = PCI_VENDOR_ID_IBM,
7693           .bios   = TPACPI_MATCH_ANY,
7694           .ec     = TPACPI_MATCH_ANY,
7695           .quirks = TPACPI_VOL_Q_LEVEL },
7696
7697         /* Lenovo models with volume control (needs confirmation) */
7698         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7699         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7700         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7701         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7702         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7703         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7704         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7705
7706         /* Whitelist mute-only on all Lenovo by default */
7707         { .vendor = PCI_VENDOR_ID_LENOVO,
7708           .bios   = TPACPI_MATCH_ANY,
7709           .ec     = TPACPI_MATCH_ANY,
7710           .quirks = TPACPI_VOL_Q_MUTEONLY }
7711 };
7712
7713 static int __init volume_init(struct ibm_init_struct *iibm)
7714 {
7715         unsigned long quirks;
7716         int rc;
7717
7718         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7719
7720         mutex_init(&volume_mutex);
7721
7722         /*
7723          * Check for module parameter bogosity, note that we
7724          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7725          * able to detect "unspecified"
7726          */
7727         if (volume_mode > TPACPI_VOL_MODE_MAX)
7728                 return -EINVAL;
7729
7730         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7731                 pr_err("UCMS step volume mode not implemented, please contact %s\n",
7732                        TPACPI_MAIL);
7733                 return 1;
7734         }
7735
7736         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7737                 return -EINVAL;
7738
7739         /*
7740          * The ALSA mixer is our primary interface.
7741          * When disabled, don't install the subdriver at all
7742          */
7743         if (!alsa_enable) {
7744                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7745                             "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7746                 return 1;
7747         }
7748
7749         quirks = tpacpi_check_quirks(volume_quirk_table,
7750                                      ARRAY_SIZE(volume_quirk_table));
7751
7752         switch (volume_capabilities) {
7753         case TPACPI_VOL_CAP_AUTO:
7754                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7755                         tp_features.mixer_no_level_control = 1;
7756                 else if (quirks & TPACPI_VOL_Q_LEVEL)
7757                         tp_features.mixer_no_level_control = 0;
7758                 else
7759                         return 1; /* no mixer */
7760                 break;
7761         case TPACPI_VOL_CAP_VOLMUTE:
7762                 tp_features.mixer_no_level_control = 0;
7763                 break;
7764         case TPACPI_VOL_CAP_MUTEONLY:
7765                 tp_features.mixer_no_level_control = 1;
7766                 break;
7767         default:
7768                 return 1;
7769         }
7770
7771         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7772                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7773                                 "using user-supplied volume_capabilities=%d\n",
7774                                 volume_capabilities);
7775
7776         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7777             volume_mode == TPACPI_VOL_MODE_MAX) {
7778                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7779
7780                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7781                                 "driver auto-selected volume_mode=%d\n",
7782                                 volume_mode);
7783         } else {
7784                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7785                                 "using user-supplied volume_mode=%d\n",
7786                                 volume_mode);
7787         }
7788
7789         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7790                         "mute is supported, volume control is %s\n",
7791                         str_supported(!tp_features.mixer_no_level_control));
7792
7793         if (software_mute_requested && volume_set_software_mute(true) == 0) {
7794                 software_mute_active = true;
7795         } else {
7796                 rc = volume_create_alsa_mixer();
7797                 if (rc) {
7798                         pr_err("Could not create the ALSA mixer interface\n");
7799                         return rc;
7800                 }
7801
7802                 pr_info("Console audio control enabled, mode: %s\n",
7803                         (volume_control_allowed) ?
7804                                 "override (read/write)" :
7805                                 "monitor (read only)");
7806         }
7807
7808         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7809                 "registering volume hotkeys as change notification\n");
7810         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7811                         | TP_ACPI_HKEY_VOLUP_MASK
7812                         | TP_ACPI_HKEY_VOLDWN_MASK
7813                         | TP_ACPI_HKEY_MUTE_MASK);
7814
7815         return 0;
7816 }
7817
7818 static int volume_read(struct seq_file *m)
7819 {
7820         u8 status;
7821
7822         if (volume_get_status(&status) < 0) {
7823                 seq_printf(m, "level:\t\tunreadable\n");
7824         } else {
7825                 if (tp_features.mixer_no_level_control)
7826                         seq_printf(m, "level:\t\tunsupported\n");
7827                 else
7828                         seq_printf(m, "level:\t\t%d\n",
7829                                         status & TP_EC_AUDIO_LVL_MSK);
7830
7831                 seq_printf(m, "mute:\t\t%s\n",
7832                                 onoff(status, TP_EC_AUDIO_MUTESW));
7833
7834                 if (volume_control_allowed) {
7835                         seq_printf(m, "commands:\tunmute, mute\n");
7836                         if (!tp_features.mixer_no_level_control) {
7837                                 seq_printf(m, "commands:\tup, down\n");
7838                                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7839                                               TP_EC_VOLUME_MAX);
7840                         }
7841                 }
7842         }
7843
7844         return 0;
7845 }
7846
7847 static int volume_write(char *buf)
7848 {
7849         u8 s;
7850         u8 new_level, new_mute;
7851         int l;
7852         char *cmd;
7853         int rc;
7854
7855         /*
7856          * We do allow volume control at driver startup, so that the
7857          * user can set initial state through the volume=... parameter hack.
7858          */
7859         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7860                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7861                         tp_warned.volume_ctrl_forbidden = 1;
7862                         pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7863                         pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7864                 }
7865                 return -EPERM;
7866         }
7867
7868         rc = volume_get_status(&s);
7869         if (rc < 0)
7870                 return rc;
7871
7872         new_level = s & TP_EC_AUDIO_LVL_MSK;
7873         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7874
7875         while ((cmd = next_cmd(&buf))) {
7876                 if (!tp_features.mixer_no_level_control) {
7877                         if (strlencmp(cmd, "up") == 0) {
7878                                 if (new_mute)
7879                                         new_mute = 0;
7880                                 else if (new_level < TP_EC_VOLUME_MAX)
7881                                         new_level++;
7882                                 continue;
7883                         } else if (strlencmp(cmd, "down") == 0) {
7884                                 if (new_mute)
7885                                         new_mute = 0;
7886                                 else if (new_level > 0)
7887                                         new_level--;
7888                                 continue;
7889                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7890                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7891                                         new_level = l;
7892                                 continue;
7893                         }
7894                 }
7895                 if (strlencmp(cmd, "mute") == 0)
7896                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7897                 else if (strlencmp(cmd, "unmute") == 0)
7898                         new_mute = 0;
7899                 else
7900                         return -EINVAL;
7901         }
7902
7903         if (tp_features.mixer_no_level_control) {
7904                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7905                                         new_mute ? "" : "un");
7906                 rc = volume_set_mute(!!new_mute);
7907         } else {
7908                 tpacpi_disclose_usertask("procfs volume",
7909                                         "%smute and set level to %d\n",
7910                                         new_mute ? "" : "un", new_level);
7911                 rc = volume_set_status(new_mute | new_level);
7912         }
7913         volume_alsa_notify_change();
7914
7915         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7916 }
7917
7918 static struct ibm_struct volume_driver_data = {
7919         .name = "volume",
7920         .read = volume_read,
7921         .write = volume_write,
7922         .exit = volume_exit,
7923         .suspend = volume_suspend,
7924         .resume = volume_resume,
7925         .shutdown = volume_shutdown,
7926 };
7927
7928 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7929
7930 #define alsa_card NULL
7931
7932 static inline void volume_alsa_notify_change(void)
7933 {
7934 }
7935
7936 static int __init volume_init(struct ibm_init_struct *iibm)
7937 {
7938         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7939
7940         return 1;
7941 }
7942
7943 static struct ibm_struct volume_driver_data = {
7944         .name = "volume",
7945 };
7946
7947 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7948
7949 /*************************************************************************
7950  * Fan subdriver
7951  */
7952
7953 /*
7954  * FAN ACCESS MODES
7955  *
7956  * TPACPI_FAN_RD_ACPI_GFAN:
7957  *      ACPI GFAN method: returns fan level
7958  *
7959  *      see TPACPI_FAN_WR_ACPI_SFAN
7960  *      EC 0x2f (HFSP) not available if GFAN exists
7961  *
7962  * TPACPI_FAN_WR_ACPI_SFAN:
7963  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7964  *
7965  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7966  *      it for writing.
7967  *
7968  * TPACPI_FAN_WR_TPEC:
7969  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7970  *      Supported on almost all ThinkPads
7971  *
7972  *      Fan speed changes of any sort (including those caused by the
7973  *      disengaged mode) are usually done slowly by the firmware as the
7974  *      maximum amount of fan duty cycle change per second seems to be
7975  *      limited.
7976  *
7977  *      Reading is not available if GFAN exists.
7978  *      Writing is not available if SFAN exists.
7979  *
7980  *      Bits
7981  *       7      automatic mode engaged;
7982  *              (default operation mode of the ThinkPad)
7983  *              fan level is ignored in this mode.
7984  *       6      full speed mode (takes precedence over bit 7);
7985  *              not available on all thinkpads.  May disable
7986  *              the tachometer while the fan controller ramps up
7987  *              the speed (which can take up to a few *minutes*).
7988  *              Speeds up fan to 100% duty-cycle, which is far above
7989  *              the standard RPM levels.  It is not impossible that
7990  *              it could cause hardware damage.
7991  *      5-3     unused in some models.  Extra bits for fan level
7992  *              in others, but still useless as all values above
7993  *              7 map to the same speed as level 7 in these models.
7994  *      2-0     fan level (0..7 usually)
7995  *                      0x00 = stop
7996  *                      0x07 = max (set when temperatures critical)
7997  *              Some ThinkPads may have other levels, see
7998  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7999  *
8000  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
8001  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
8002  *      does so, its initial value is meaningless (0x07).
8003  *
8004  *      For firmware bugs, refer to:
8005  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8006  *
8007  *      ----
8008  *
8009  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
8010  *      Main fan tachometer reading (in RPM)
8011  *
8012  *      This register is present on all ThinkPads with a new-style EC, and
8013  *      it is known not to be present on the A21m/e, and T22, as there is
8014  *      something else in offset 0x84 according to the ACPI DSDT.  Other
8015  *      ThinkPads from this same time period (and earlier) probably lack the
8016  *      tachometer as well.
8017  *
8018  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8019  *      was never fixed by IBM to report the EC firmware version string
8020  *      probably support the tachometer (like the early X models), so
8021  *      detecting it is quite hard.  We need more data to know for sure.
8022  *
8023  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8024  *      might result.
8025  *
8026  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
8027  *      mode.
8028  *
8029  *      For firmware bugs, refer to:
8030  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8031  *
8032  *      ----
8033  *
8034  *      ThinkPad EC register 0x31 bit 0 (only on select models)
8035  *
8036  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
8037  *      show the speed of the main fan.  When bit 0 of EC register 0x31
8038  *      is one, the tachometer registers show the speed of the auxiliary
8039  *      fan.
8040  *
8041  *      Fan control seems to affect both fans, regardless of the state
8042  *      of this bit.
8043  *
8044  *      So far, only the firmware for the X60/X61 non-tablet versions
8045  *      seem to support this (firmware TP-7M).
8046  *
8047  * TPACPI_FAN_WR_ACPI_FANS:
8048  *      ThinkPad X31, X40, X41.  Not available in the X60.
8049  *
8050  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
8051  *      high speed.  ACPI DSDT seems to map these three speeds to levels
8052  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8053  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8054  *
8055  *      The speeds are stored on handles
8056  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
8057  *
8058  *      There are three default speed sets, accessible as handles:
8059  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8060  *
8061  *      ACPI DSDT switches which set is in use depending on various
8062  *      factors.
8063  *
8064  *      TPACPI_FAN_WR_TPEC is also available and should be used to
8065  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
8066  *      but the ACPI tables just mention level 7.
8067  */
8068
8069 enum {                                  /* Fan control constants */
8070         fan_status_offset = 0x2f,       /* EC register 0x2f */
8071         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
8072                                          * 0x84 must be read before 0x85 */
8073         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
8074                                            bit 0 selects which fan is active */
8075
8076         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
8077         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
8078
8079         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
8080 };
8081
8082 enum fan_status_access_mode {
8083         TPACPI_FAN_NONE = 0,            /* No fan status or control */
8084         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
8085         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
8086 };
8087
8088 enum fan_control_access_mode {
8089         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
8090         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
8091         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
8092         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
8093 };
8094
8095 enum fan_control_commands {
8096         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
8097         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
8098         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
8099                                                  * and also watchdog cmd */
8100 };
8101
8102 static bool fan_control_allowed;
8103
8104 static enum fan_status_access_mode fan_status_access_mode;
8105 static enum fan_control_access_mode fan_control_access_mode;
8106 static enum fan_control_commands fan_control_commands;
8107
8108 static u8 fan_control_initial_status;
8109 static u8 fan_control_desired_level;
8110 static u8 fan_control_resume_level;
8111 static int fan_watchdog_maxinterval;
8112
8113 static struct mutex fan_mutex;
8114
8115 static void fan_watchdog_fire(struct work_struct *ignored);
8116 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8117
8118 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
8119 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
8120            "\\FSPD",            /* 600e/x, 770e, 770x */
8121            );                   /* all others */
8122 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
8123            "JFNS",              /* 770x-JL */
8124            );                   /* all others */
8125
8126 /*
8127  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8128  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8129  * be in auto mode (0x80).
8130  *
8131  * This is corrected by any write to HFSP either by the driver, or
8132  * by the firmware.
8133  *
8134  * We assume 0x07 really means auto mode while this quirk is active,
8135  * as this is far more likely than the ThinkPad being in level 7,
8136  * which is only used by the firmware during thermal emergencies.
8137  *
8138  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8139  * TP-70 (T43, R52), which are known to be buggy.
8140  */
8141
8142 static void fan_quirk1_setup(void)
8143 {
8144         if (fan_control_initial_status == 0x07) {
8145                 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8146                 tp_features.fan_ctrl_status_undef = 1;
8147         }
8148 }
8149
8150 static void fan_quirk1_handle(u8 *fan_status)
8151 {
8152         if (unlikely(tp_features.fan_ctrl_status_undef)) {
8153                 if (*fan_status != fan_control_initial_status) {
8154                         /* something changed the HFSP regisnter since
8155                          * driver init time, so it is not undefined
8156                          * anymore */
8157                         tp_features.fan_ctrl_status_undef = 0;
8158                 } else {
8159                         /* Return most likely status. In fact, it
8160                          * might be the only possible status */
8161                         *fan_status = TP_EC_FAN_AUTO;
8162                 }
8163         }
8164 }
8165
8166 /* Select main fan on X60/X61, NOOP on others */
8167 static bool fan_select_fan1(void)
8168 {
8169         if (tp_features.second_fan) {
8170                 u8 val;
8171
8172                 if (ec_read(fan_select_offset, &val) < 0)
8173                         return false;
8174                 val &= 0xFEU;
8175                 if (ec_write(fan_select_offset, val) < 0)
8176                         return false;
8177         }
8178         return true;
8179 }
8180
8181 /* Select secondary fan on X60/X61 */
8182 static bool fan_select_fan2(void)
8183 {
8184         u8 val;
8185
8186         if (!tp_features.second_fan)
8187                 return false;
8188
8189         if (ec_read(fan_select_offset, &val) < 0)
8190                 return false;
8191         val |= 0x01U;
8192         if (ec_write(fan_select_offset, val) < 0)
8193                 return false;
8194
8195         return true;
8196 }
8197
8198 /*
8199  * Call with fan_mutex held
8200  */
8201 static void fan_update_desired_level(u8 status)
8202 {
8203         if ((status &
8204              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8205                 if (status > 7)
8206                         fan_control_desired_level = 7;
8207                 else
8208                         fan_control_desired_level = status;
8209         }
8210 }
8211
8212 static int fan_get_status(u8 *status)
8213 {
8214         u8 s;
8215
8216         /* TODO:
8217          * Add TPACPI_FAN_RD_ACPI_FANS ? */
8218
8219         switch (fan_status_access_mode) {
8220         case TPACPI_FAN_RD_ACPI_GFAN: {
8221                 /* 570, 600e/x, 770e, 770x */
8222                 int res;
8223
8224                 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8225                         return -EIO;
8226
8227                 if (likely(status))
8228                         *status = res & 0x07;
8229
8230                 break;
8231         }
8232         case TPACPI_FAN_RD_TPEC:
8233                 /* all except 570, 600e/x, 770e, 770x */
8234                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8235                         return -EIO;
8236
8237                 if (likely(status)) {
8238                         *status = s;
8239                         fan_quirk1_handle(status);
8240                 }
8241
8242                 break;
8243
8244         default:
8245                 return -ENXIO;
8246         }
8247
8248         return 0;
8249 }
8250
8251 static int fan_get_status_safe(u8 *status)
8252 {
8253         int rc;
8254         u8 s;
8255
8256         if (mutex_lock_killable(&fan_mutex))
8257                 return -ERESTARTSYS;
8258         rc = fan_get_status(&s);
8259         if (!rc)
8260                 fan_update_desired_level(s);
8261         mutex_unlock(&fan_mutex);
8262
8263         if (rc)
8264                 return rc;
8265         if (status)
8266                 *status = s;
8267
8268         return 0;
8269 }
8270
8271 static int fan_get_speed(unsigned int *speed)
8272 {
8273         u8 hi, lo;
8274
8275         switch (fan_status_access_mode) {
8276         case TPACPI_FAN_RD_TPEC:
8277                 /* all except 570, 600e/x, 770e, 770x */
8278                 if (unlikely(!fan_select_fan1()))
8279                         return -EIO;
8280                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8281                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8282                         return -EIO;
8283
8284                 if (likely(speed))
8285                         *speed = (hi << 8) | lo;
8286
8287                 break;
8288
8289         default:
8290                 return -ENXIO;
8291         }
8292
8293         return 0;
8294 }
8295
8296 static int fan2_get_speed(unsigned int *speed)
8297 {
8298         u8 hi, lo;
8299         bool rc;
8300
8301         switch (fan_status_access_mode) {
8302         case TPACPI_FAN_RD_TPEC:
8303                 /* all except 570, 600e/x, 770e, 770x */
8304                 if (unlikely(!fan_select_fan2()))
8305                         return -EIO;
8306                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8307                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
8308                 fan_select_fan1(); /* play it safe */
8309                 if (rc)
8310                         return -EIO;
8311
8312                 if (likely(speed))
8313                         *speed = (hi << 8) | lo;
8314
8315                 break;
8316
8317         default:
8318                 return -ENXIO;
8319         }
8320
8321         return 0;
8322 }
8323
8324 static int fan_set_level(int level)
8325 {
8326         if (!fan_control_allowed)
8327                 return -EPERM;
8328
8329         switch (fan_control_access_mode) {
8330         case TPACPI_FAN_WR_ACPI_SFAN:
8331                 if (level >= 0 && level <= 7) {
8332                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8333                                 return -EIO;
8334                 } else
8335                         return -EINVAL;
8336                 break;
8337
8338         case TPACPI_FAN_WR_ACPI_FANS:
8339         case TPACPI_FAN_WR_TPEC:
8340                 if (!(level & TP_EC_FAN_AUTO) &&
8341                     !(level & TP_EC_FAN_FULLSPEED) &&
8342                     ((level < 0) || (level > 7)))
8343                         return -EINVAL;
8344
8345                 /* safety net should the EC not support AUTO
8346                  * or FULLSPEED mode bits and just ignore them */
8347                 if (level & TP_EC_FAN_FULLSPEED)
8348                         level |= 7;     /* safety min speed 7 */
8349                 else if (level & TP_EC_FAN_AUTO)
8350                         level |= 4;     /* safety min speed 4 */
8351
8352                 if (!acpi_ec_write(fan_status_offset, level))
8353                         return -EIO;
8354                 else
8355                         tp_features.fan_ctrl_status_undef = 0;
8356                 break;
8357
8358         default:
8359                 return -ENXIO;
8360         }
8361
8362         vdbg_printk(TPACPI_DBG_FAN,
8363                 "fan control: set fan control register to 0x%02x\n", level);
8364         return 0;
8365 }
8366
8367 static int fan_set_level_safe(int level)
8368 {
8369         int rc;
8370
8371         if (!fan_control_allowed)
8372                 return -EPERM;
8373
8374         if (mutex_lock_killable(&fan_mutex))
8375                 return -ERESTARTSYS;
8376
8377         if (level == TPACPI_FAN_LAST_LEVEL)
8378                 level = fan_control_desired_level;
8379
8380         rc = fan_set_level(level);
8381         if (!rc)
8382                 fan_update_desired_level(level);
8383
8384         mutex_unlock(&fan_mutex);
8385         return rc;
8386 }
8387
8388 static int fan_set_enable(void)
8389 {
8390         u8 s;
8391         int rc;
8392
8393         if (!fan_control_allowed)
8394                 return -EPERM;
8395
8396         if (mutex_lock_killable(&fan_mutex))
8397                 return -ERESTARTSYS;
8398
8399         switch (fan_control_access_mode) {
8400         case TPACPI_FAN_WR_ACPI_FANS:
8401         case TPACPI_FAN_WR_TPEC:
8402                 rc = fan_get_status(&s);
8403                 if (rc < 0)
8404                         break;
8405
8406                 /* Don't go out of emergency fan mode */
8407                 if (s != 7) {
8408                         s &= 0x07;
8409                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8410                 }
8411
8412                 if (!acpi_ec_write(fan_status_offset, s))
8413                         rc = -EIO;
8414                 else {
8415                         tp_features.fan_ctrl_status_undef = 0;
8416                         rc = 0;
8417                 }
8418                 break;
8419
8420         case TPACPI_FAN_WR_ACPI_SFAN:
8421                 rc = fan_get_status(&s);
8422                 if (rc < 0)
8423                         break;
8424
8425                 s &= 0x07;
8426
8427                 /* Set fan to at least level 4 */
8428                 s |= 4;
8429
8430                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8431                         rc = -EIO;
8432                 else
8433                         rc = 0;
8434                 break;
8435
8436         default:
8437                 rc = -ENXIO;
8438         }
8439
8440         mutex_unlock(&fan_mutex);
8441
8442         if (!rc)
8443                 vdbg_printk(TPACPI_DBG_FAN,
8444                         "fan control: set fan control register to 0x%02x\n",
8445                         s);
8446         return rc;
8447 }
8448
8449 static int fan_set_disable(void)
8450 {
8451         int rc;
8452
8453         if (!fan_control_allowed)
8454                 return -EPERM;
8455
8456         if (mutex_lock_killable(&fan_mutex))
8457                 return -ERESTARTSYS;
8458
8459         rc = 0;
8460         switch (fan_control_access_mode) {
8461         case TPACPI_FAN_WR_ACPI_FANS:
8462         case TPACPI_FAN_WR_TPEC:
8463                 if (!acpi_ec_write(fan_status_offset, 0x00))
8464                         rc = -EIO;
8465                 else {
8466                         fan_control_desired_level = 0;
8467                         tp_features.fan_ctrl_status_undef = 0;
8468                 }
8469                 break;
8470
8471         case TPACPI_FAN_WR_ACPI_SFAN:
8472                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8473                         rc = -EIO;
8474                 else
8475                         fan_control_desired_level = 0;
8476                 break;
8477
8478         default:
8479                 rc = -ENXIO;
8480         }
8481
8482         if (!rc)
8483                 vdbg_printk(TPACPI_DBG_FAN,
8484                         "fan control: set fan control register to 0\n");
8485
8486         mutex_unlock(&fan_mutex);
8487         return rc;
8488 }
8489
8490 static int fan_set_speed(int speed)
8491 {
8492         int rc;
8493
8494         if (!fan_control_allowed)
8495                 return -EPERM;
8496
8497         if (mutex_lock_killable(&fan_mutex))
8498                 return -ERESTARTSYS;
8499
8500         rc = 0;
8501         switch (fan_control_access_mode) {
8502         case TPACPI_FAN_WR_ACPI_FANS:
8503                 if (speed >= 0 && speed <= 65535) {
8504                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8505                                         speed, speed, speed))
8506                                 rc = -EIO;
8507                 } else
8508                         rc = -EINVAL;
8509                 break;
8510
8511         default:
8512                 rc = -ENXIO;
8513         }
8514
8515         mutex_unlock(&fan_mutex);
8516         return rc;
8517 }
8518
8519 static void fan_watchdog_reset(void)
8520 {
8521         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8522                 return;
8523
8524         if (fan_watchdog_maxinterval > 0 &&
8525             tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8526                 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8527                         msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8528         else
8529                 cancel_delayed_work(&fan_watchdog_task);
8530 }
8531
8532 static void fan_watchdog_fire(struct work_struct *ignored)
8533 {
8534         int rc;
8535
8536         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8537                 return;
8538
8539         pr_notice("fan watchdog: enabling fan\n");
8540         rc = fan_set_enable();
8541         if (rc < 0) {
8542                 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8543                        rc);
8544                 /* reschedule for later */
8545                 fan_watchdog_reset();
8546         }
8547 }
8548
8549 /*
8550  * SYSFS fan layout: hwmon compatible (device)
8551  *
8552  * pwm*_enable:
8553  *      0: "disengaged" mode
8554  *      1: manual mode
8555  *      2: native EC "auto" mode (recommended, hardware default)
8556  *
8557  * pwm*: set speed in manual mode, ignored otherwise.
8558  *      0 is level 0; 255 is level 7. Intermediate points done with linear
8559  *      interpolation.
8560  *
8561  * fan*_input: tachometer reading, RPM
8562  *
8563  *
8564  * SYSFS fan layout: extensions
8565  *
8566  * fan_watchdog (driver):
8567  *      fan watchdog interval in seconds, 0 disables (default), max 120
8568  */
8569
8570 /* sysfs fan pwm1_enable ----------------------------------------------- */
8571 static ssize_t fan_pwm1_enable_show(struct device *dev,
8572                                     struct device_attribute *attr,
8573                                     char *buf)
8574 {
8575         int res, mode;
8576         u8 status;
8577
8578         res = fan_get_status_safe(&status);
8579         if (res)
8580                 return res;
8581
8582         if (status & TP_EC_FAN_FULLSPEED) {
8583                 mode = 0;
8584         } else if (status & TP_EC_FAN_AUTO) {
8585                 mode = 2;
8586         } else
8587                 mode = 1;
8588
8589         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8590 }
8591
8592 static ssize_t fan_pwm1_enable_store(struct device *dev,
8593                                      struct device_attribute *attr,
8594                                      const char *buf, size_t count)
8595 {
8596         unsigned long t;
8597         int res, level;
8598
8599         if (parse_strtoul(buf, 2, &t))
8600                 return -EINVAL;
8601
8602         tpacpi_disclose_usertask("hwmon pwm1_enable",
8603                         "set fan mode to %lu\n", t);
8604
8605         switch (t) {
8606         case 0:
8607                 level = TP_EC_FAN_FULLSPEED;
8608                 break;
8609         case 1:
8610                 level = TPACPI_FAN_LAST_LEVEL;
8611                 break;
8612         case 2:
8613                 level = TP_EC_FAN_AUTO;
8614                 break;
8615         case 3:
8616                 /* reserved for software-controlled auto mode */
8617                 return -ENOSYS;
8618         default:
8619                 return -EINVAL;
8620         }
8621
8622         res = fan_set_level_safe(level);
8623         if (res == -ENXIO)
8624                 return -EINVAL;
8625         else if (res < 0)
8626                 return res;
8627
8628         fan_watchdog_reset();
8629
8630         return count;
8631 }
8632
8633 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8634                    fan_pwm1_enable_show, fan_pwm1_enable_store);
8635
8636 /* sysfs fan pwm1 ------------------------------------------------------ */
8637 static ssize_t fan_pwm1_show(struct device *dev,
8638                              struct device_attribute *attr,
8639                              char *buf)
8640 {
8641         int res;
8642         u8 status;
8643
8644         res = fan_get_status_safe(&status);
8645         if (res)
8646                 return res;
8647
8648         if ((status &
8649              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8650                 status = fan_control_desired_level;
8651
8652         if (status > 7)
8653                 status = 7;
8654
8655         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8656 }
8657
8658 static ssize_t fan_pwm1_store(struct device *dev,
8659                               struct device_attribute *attr,
8660                               const char *buf, size_t count)
8661 {
8662         unsigned long s;
8663         int rc;
8664         u8 status, newlevel;
8665
8666         if (parse_strtoul(buf, 255, &s))
8667                 return -EINVAL;
8668
8669         tpacpi_disclose_usertask("hwmon pwm1",
8670                         "set fan speed to %lu\n", s);
8671
8672         /* scale down from 0-255 to 0-7 */
8673         newlevel = (s >> 5) & 0x07;
8674
8675         if (mutex_lock_killable(&fan_mutex))
8676                 return -ERESTARTSYS;
8677
8678         rc = fan_get_status(&status);
8679         if (!rc && (status &
8680                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8681                 rc = fan_set_level(newlevel);
8682                 if (rc == -ENXIO)
8683                         rc = -EINVAL;
8684                 else if (!rc) {
8685                         fan_update_desired_level(newlevel);
8686                         fan_watchdog_reset();
8687                 }
8688         }
8689
8690         mutex_unlock(&fan_mutex);
8691         return (rc) ? rc : count;
8692 }
8693
8694 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8695
8696 /* sysfs fan fan1_input ------------------------------------------------ */
8697 static ssize_t fan_fan1_input_show(struct device *dev,
8698                            struct device_attribute *attr,
8699                            char *buf)
8700 {
8701         int res;
8702         unsigned int speed;
8703
8704         res = fan_get_speed(&speed);
8705         if (res < 0)
8706                 return res;
8707
8708         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8709 }
8710
8711 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8712
8713 /* sysfs fan fan2_input ------------------------------------------------ */
8714 static ssize_t fan_fan2_input_show(struct device *dev,
8715                            struct device_attribute *attr,
8716                            char *buf)
8717 {
8718         int res;
8719         unsigned int speed;
8720
8721         res = fan2_get_speed(&speed);
8722         if (res < 0)
8723                 return res;
8724
8725         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8726 }
8727
8728 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8729
8730 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8731 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8732 {
8733         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8734 }
8735
8736 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8737                                   size_t count)
8738 {
8739         unsigned long t;
8740
8741         if (parse_strtoul(buf, 120, &t))
8742                 return -EINVAL;
8743
8744         if (!fan_control_allowed)
8745                 return -EPERM;
8746
8747         fan_watchdog_maxinterval = t;
8748         fan_watchdog_reset();
8749
8750         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8751
8752         return count;
8753 }
8754 static DRIVER_ATTR_RW(fan_watchdog);
8755
8756 /* --------------------------------------------------------------------- */
8757 static struct attribute *fan_attributes[] = {
8758         &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8759         &dev_attr_fan1_input.attr,
8760         NULL, /* for fan2_input */
8761         NULL
8762 };
8763
8764 static const struct attribute_group fan_attr_group = {
8765         .attrs = fan_attributes,
8766 };
8767
8768 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
8769 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
8770
8771 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8772         TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8773         TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8774         TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8775         TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8776         TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8777         TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8778 };
8779
8780 static int __init fan_init(struct ibm_init_struct *iibm)
8781 {
8782         int rc;
8783         unsigned long quirks;
8784
8785         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8786                         "initializing fan subdriver\n");
8787
8788         mutex_init(&fan_mutex);
8789         fan_status_access_mode = TPACPI_FAN_NONE;
8790         fan_control_access_mode = TPACPI_FAN_WR_NONE;
8791         fan_control_commands = 0;
8792         fan_watchdog_maxinterval = 0;
8793         tp_features.fan_ctrl_status_undef = 0;
8794         tp_features.second_fan = 0;
8795         fan_control_desired_level = 7;
8796
8797         if (tpacpi_is_ibm()) {
8798                 TPACPI_ACPIHANDLE_INIT(fans);
8799                 TPACPI_ACPIHANDLE_INIT(gfan);
8800                 TPACPI_ACPIHANDLE_INIT(sfan);
8801         }
8802
8803         quirks = tpacpi_check_quirks(fan_quirk_table,
8804                                      ARRAY_SIZE(fan_quirk_table));
8805
8806         if (gfan_handle) {
8807                 /* 570, 600e/x, 770e, 770x */
8808                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8809         } else {
8810                 /* all other ThinkPads: note that even old-style
8811                  * ThinkPad ECs supports the fan control register */
8812                 if (likely(acpi_ec_read(fan_status_offset,
8813                                         &fan_control_initial_status))) {
8814                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8815                         if (quirks & TPACPI_FAN_Q1)
8816                                 fan_quirk1_setup();
8817                         if (quirks & TPACPI_FAN_2FAN) {
8818                                 tp_features.second_fan = 1;
8819                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8820                                         "secondary fan support enabled\n");
8821                         }
8822                 } else {
8823                         pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8824                         return 1;
8825                 }
8826         }
8827
8828         if (sfan_handle) {
8829                 /* 570, 770x-JL */
8830                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8831                 fan_control_commands |=
8832                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8833         } else {
8834                 if (!gfan_handle) {
8835                         /* gfan without sfan means no fan control */
8836                         /* all other models implement TP EC 0x2f control */
8837
8838                         if (fans_handle) {
8839                                 /* X31, X40, X41 */
8840                                 fan_control_access_mode =
8841                                     TPACPI_FAN_WR_ACPI_FANS;
8842                                 fan_control_commands |=
8843                                     TPACPI_FAN_CMD_SPEED |
8844                                     TPACPI_FAN_CMD_LEVEL |
8845                                     TPACPI_FAN_CMD_ENABLE;
8846                         } else {
8847                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8848                                 fan_control_commands |=
8849                                     TPACPI_FAN_CMD_LEVEL |
8850                                     TPACPI_FAN_CMD_ENABLE;
8851                         }
8852                 }
8853         }
8854
8855         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8856                 "fan is %s, modes %d, %d\n",
8857                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8858                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8859                 fan_status_access_mode, fan_control_access_mode);
8860
8861         /* fan control master switch */
8862         if (!fan_control_allowed) {
8863                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8864                 fan_control_commands = 0;
8865                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8866                            "fan control features disabled by parameter\n");
8867         }
8868
8869         /* update fan_control_desired_level */
8870         if (fan_status_access_mode != TPACPI_FAN_NONE)
8871                 fan_get_status_safe(NULL);
8872
8873         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8874             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8875                 if (tp_features.second_fan) {
8876                         /* attach second fan tachometer */
8877                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8878                                         &dev_attr_fan2_input.attr;
8879                 }
8880                 rc = sysfs_create_group(&tpacpi_hwmon->kobj,
8881                                          &fan_attr_group);
8882                 if (rc < 0)
8883                         return rc;
8884
8885                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8886                                         &driver_attr_fan_watchdog);
8887                 if (rc < 0) {
8888                         sysfs_remove_group(&tpacpi_hwmon->kobj,
8889                                         &fan_attr_group);
8890                         return rc;
8891                 }
8892                 return 0;
8893         } else
8894                 return 1;
8895 }
8896
8897 static void fan_exit(void)
8898 {
8899         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8900                     "cancelling any pending fan watchdog tasks\n");
8901
8902         /* FIXME: can we really do this unconditionally? */
8903         sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group);
8904         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8905                            &driver_attr_fan_watchdog);
8906
8907         cancel_delayed_work(&fan_watchdog_task);
8908         flush_workqueue(tpacpi_wq);
8909 }
8910
8911 static void fan_suspend(void)
8912 {
8913         int rc;
8914
8915         if (!fan_control_allowed)
8916                 return;
8917
8918         /* Store fan status in cache */
8919         fan_control_resume_level = 0;
8920         rc = fan_get_status_safe(&fan_control_resume_level);
8921         if (rc < 0)
8922                 pr_notice("failed to read fan level for later restore during resume: %d\n",
8923                           rc);
8924
8925         /* if it is undefined, don't attempt to restore it.
8926          * KEEP THIS LAST */
8927         if (tp_features.fan_ctrl_status_undef)
8928                 fan_control_resume_level = 0;
8929 }
8930
8931 static void fan_resume(void)
8932 {
8933         u8 current_level = 7;
8934         bool do_set = false;
8935         int rc;
8936
8937         /* DSDT *always* updates status on resume */
8938         tp_features.fan_ctrl_status_undef = 0;
8939
8940         if (!fan_control_allowed ||
8941             !fan_control_resume_level ||
8942             (fan_get_status_safe(&current_level) < 0))
8943                 return;
8944
8945         switch (fan_control_access_mode) {
8946         case TPACPI_FAN_WR_ACPI_SFAN:
8947                 /* never decrease fan level */
8948                 do_set = (fan_control_resume_level > current_level);
8949                 break;
8950         case TPACPI_FAN_WR_ACPI_FANS:
8951         case TPACPI_FAN_WR_TPEC:
8952                 /* never decrease fan level, scale is:
8953                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8954                  *
8955                  * We expect the firmware to set either 7 or AUTO, but we
8956                  * handle FULLSPEED out of paranoia.
8957                  *
8958                  * So, we can safely only restore FULLSPEED or 7, anything
8959                  * else could slow the fan.  Restoring AUTO is useless, at
8960                  * best that's exactly what the DSDT already set (it is the
8961                  * slower it uses).
8962                  *
8963                  * Always keep in mind that the DSDT *will* have set the
8964                  * fans to what the vendor supposes is the best level.  We
8965                  * muck with it only to speed the fan up.
8966                  */
8967                 if (fan_control_resume_level != 7 &&
8968                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8969                         return;
8970                 else
8971                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8972                                  (current_level != fan_control_resume_level);
8973                 break;
8974         default:
8975                 return;
8976         }
8977         if (do_set) {
8978                 pr_notice("restoring fan level to 0x%02x\n",
8979                           fan_control_resume_level);
8980                 rc = fan_set_level_safe(fan_control_resume_level);
8981                 if (rc < 0)
8982                         pr_notice("failed to restore fan level: %d\n", rc);
8983         }
8984 }
8985
8986 static int fan_read(struct seq_file *m)
8987 {
8988         int rc;
8989         u8 status;
8990         unsigned int speed = 0;
8991
8992         switch (fan_status_access_mode) {
8993         case TPACPI_FAN_RD_ACPI_GFAN:
8994                 /* 570, 600e/x, 770e, 770x */
8995                 rc = fan_get_status_safe(&status);
8996                 if (rc < 0)
8997                         return rc;
8998
8999                 seq_printf(m, "status:\t\t%s\n"
9000                                "level:\t\t%d\n",
9001                                (status != 0) ? "enabled" : "disabled", status);
9002                 break;
9003
9004         case TPACPI_FAN_RD_TPEC:
9005                 /* all except 570, 600e/x, 770e, 770x */
9006                 rc = fan_get_status_safe(&status);
9007                 if (rc < 0)
9008                         return rc;
9009
9010                 seq_printf(m, "status:\t\t%s\n",
9011                                (status != 0) ? "enabled" : "disabled");
9012
9013                 rc = fan_get_speed(&speed);
9014                 if (rc < 0)
9015                         return rc;
9016
9017                 seq_printf(m, "speed:\t\t%d\n", speed);
9018
9019                 if (status & TP_EC_FAN_FULLSPEED)
9020                         /* Disengaged mode takes precedence */
9021                         seq_printf(m, "level:\t\tdisengaged\n");
9022                 else if (status & TP_EC_FAN_AUTO)
9023                         seq_printf(m, "level:\t\tauto\n");
9024                 else
9025                         seq_printf(m, "level:\t\t%d\n", status);
9026                 break;
9027
9028         case TPACPI_FAN_NONE:
9029         default:
9030                 seq_printf(m, "status:\t\tnot supported\n");
9031         }
9032
9033         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9034                 seq_printf(m, "commands:\tlevel <level>");
9035
9036                 switch (fan_control_access_mode) {
9037                 case TPACPI_FAN_WR_ACPI_SFAN:
9038                         seq_printf(m, " (<level> is 0-7)\n");
9039                         break;
9040
9041                 default:
9042                         seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9043                         break;
9044                 }
9045         }
9046
9047         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9048                 seq_printf(m, "commands:\tenable, disable\n"
9049                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9050
9051         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9052                 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9053
9054         return 0;
9055 }
9056
9057 static int fan_write_cmd_level(const char *cmd, int *rc)
9058 {
9059         int level;
9060
9061         if (strlencmp(cmd, "level auto") == 0)
9062                 level = TP_EC_FAN_AUTO;
9063         else if ((strlencmp(cmd, "level disengaged") == 0) |
9064                         (strlencmp(cmd, "level full-speed") == 0))
9065                 level = TP_EC_FAN_FULLSPEED;
9066         else if (sscanf(cmd, "level %d", &level) != 1)
9067                 return 0;
9068
9069         *rc = fan_set_level_safe(level);
9070         if (*rc == -ENXIO)
9071                 pr_err("level command accepted for unsupported access mode %d\n",
9072                        fan_control_access_mode);
9073         else if (!*rc)
9074                 tpacpi_disclose_usertask("procfs fan",
9075                         "set level to %d\n", level);
9076
9077         return 1;
9078 }
9079
9080 static int fan_write_cmd_enable(const char *cmd, int *rc)
9081 {
9082         if (strlencmp(cmd, "enable") != 0)
9083                 return 0;
9084
9085         *rc = fan_set_enable();
9086         if (*rc == -ENXIO)
9087                 pr_err("enable command accepted for unsupported access mode %d\n",
9088                        fan_control_access_mode);
9089         else if (!*rc)
9090                 tpacpi_disclose_usertask("procfs fan", "enable\n");
9091
9092         return 1;
9093 }
9094
9095 static int fan_write_cmd_disable(const char *cmd, int *rc)
9096 {
9097         if (strlencmp(cmd, "disable") != 0)
9098                 return 0;
9099
9100         *rc = fan_set_disable();
9101         if (*rc == -ENXIO)
9102                 pr_err("disable command accepted for unsupported access mode %d\n",
9103                        fan_control_access_mode);
9104         else if (!*rc)
9105                 tpacpi_disclose_usertask("procfs fan", "disable\n");
9106
9107         return 1;
9108 }
9109
9110 static int fan_write_cmd_speed(const char *cmd, int *rc)
9111 {
9112         int speed;
9113
9114         /* TODO:
9115          * Support speed <low> <medium> <high> ? */
9116
9117         if (sscanf(cmd, "speed %d", &speed) != 1)
9118                 return 0;
9119
9120         *rc = fan_set_speed(speed);
9121         if (*rc == -ENXIO)
9122                 pr_err("speed command accepted for unsupported access mode %d\n",
9123                        fan_control_access_mode);
9124         else if (!*rc)
9125                 tpacpi_disclose_usertask("procfs fan",
9126                         "set speed to %d\n", speed);
9127
9128         return 1;
9129 }
9130
9131 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9132 {
9133         int interval;
9134
9135         if (sscanf(cmd, "watchdog %d", &interval) != 1)
9136                 return 0;
9137
9138         if (interval < 0 || interval > 120)
9139                 *rc = -EINVAL;
9140         else {
9141                 fan_watchdog_maxinterval = interval;
9142                 tpacpi_disclose_usertask("procfs fan",
9143                         "set watchdog timer to %d\n",
9144                         interval);
9145         }
9146
9147         return 1;
9148 }
9149
9150 static int fan_write(char *buf)
9151 {
9152         char *cmd;
9153         int rc = 0;
9154
9155         while (!rc && (cmd = next_cmd(&buf))) {
9156                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9157                       fan_write_cmd_level(cmd, &rc)) &&
9158                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9159                       (fan_write_cmd_enable(cmd, &rc) ||
9160                        fan_write_cmd_disable(cmd, &rc) ||
9161                        fan_write_cmd_watchdog(cmd, &rc))) &&
9162                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9163                       fan_write_cmd_speed(cmd, &rc))
9164                     )
9165                         rc = -EINVAL;
9166                 else if (!rc)
9167                         fan_watchdog_reset();
9168         }
9169
9170         return rc;
9171 }
9172
9173 static struct ibm_struct fan_driver_data = {
9174         .name = "fan",
9175         .read = fan_read,
9176         .write = fan_write,
9177         .exit = fan_exit,
9178         .suspend = fan_suspend,
9179         .resume = fan_resume,
9180 };
9181
9182 /*************************************************************************
9183  * Mute LED subdriver
9184  */
9185
9186 #define TPACPI_LED_MAX          2
9187
9188 struct tp_led_table {
9189         acpi_string name;
9190         int on_value;
9191         int off_value;
9192         int state;
9193 };
9194
9195 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9196         [LED_AUDIO_MUTE] = {
9197                 .name = "SSMS",
9198                 .on_value = 1,
9199                 .off_value = 0,
9200         },
9201         [LED_AUDIO_MICMUTE] = {
9202                 .name = "MMTS",
9203                 .on_value = 2,
9204                 .off_value = 0,
9205         },
9206 };
9207
9208 static int mute_led_on_off(struct tp_led_table *t, bool state)
9209 {
9210         acpi_handle temp;
9211         int output;
9212
9213         if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9214                 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9215                 return -EIO;
9216         }
9217
9218         if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9219                         state ? t->on_value : t->off_value))
9220                 return -EIO;
9221
9222         t->state = state;
9223         return state;
9224 }
9225
9226 static int tpacpi_led_set(int whichled, bool on)
9227 {
9228         struct tp_led_table *t;
9229
9230         t = &led_tables[whichled];
9231         if (t->state < 0 || t->state == on)
9232                 return t->state;
9233         return mute_led_on_off(t, on);
9234 }
9235
9236 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9237                                enum led_brightness brightness)
9238 {
9239         return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9240 }
9241
9242 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9243                                   enum led_brightness brightness)
9244 {
9245         return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9246 }
9247
9248 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9249         [LED_AUDIO_MUTE] = {
9250                 .name           = "platform::mute",
9251                 .max_brightness = 1,
9252                 .brightness_set_blocking = tpacpi_led_mute_set,
9253                 .default_trigger = "audio-mute",
9254         },
9255         [LED_AUDIO_MICMUTE] = {
9256                 .name           = "platform::micmute",
9257                 .max_brightness = 1,
9258                 .brightness_set_blocking = tpacpi_led_micmute_set,
9259                 .default_trigger = "audio-micmute",
9260         },
9261 };
9262
9263 static int mute_led_init(struct ibm_init_struct *iibm)
9264 {
9265         acpi_handle temp;
9266         int i, err;
9267
9268         for (i = 0; i < TPACPI_LED_MAX; i++) {
9269                 struct tp_led_table *t = &led_tables[i];
9270                 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9271                         t->state = -ENODEV;
9272                         continue;
9273                 }
9274
9275                 mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9276                 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9277                 if (err < 0) {
9278                         while (i--) {
9279                                 if (led_tables[i].state >= 0)
9280                                         led_classdev_unregister(&mute_led_cdev[i]);
9281                         }
9282                         return err;
9283                 }
9284         }
9285         return 0;
9286 }
9287
9288 static void mute_led_exit(void)
9289 {
9290         int i;
9291
9292         for (i = 0; i < TPACPI_LED_MAX; i++) {
9293                 if (led_tables[i].state >= 0) {
9294                         led_classdev_unregister(&mute_led_cdev[i]);
9295                         tpacpi_led_set(i, false);
9296                 }
9297         }
9298 }
9299
9300 static void mute_led_resume(void)
9301 {
9302         int i;
9303
9304         for (i = 0; i < TPACPI_LED_MAX; i++) {
9305                 struct tp_led_table *t = &led_tables[i];
9306                 if (t->state >= 0)
9307                         mute_led_on_off(t, t->state);
9308         }
9309 }
9310
9311 static struct ibm_struct mute_led_driver_data = {
9312         .name = "mute_led",
9313         .exit = mute_led_exit,
9314         .resume = mute_led_resume,
9315 };
9316
9317 /*
9318  * Battery Wear Control Driver
9319  * Contact: Ognjen Galic <smclt30p@gmail.com>
9320  */
9321
9322 /* Metadata */
9323
9324 #define GET_START       "BCTG"
9325 #define SET_START       "BCCS"
9326 #define GET_STOP        "BCSG"
9327 #define SET_STOP        "BCSS"
9328
9329 #define START_ATTR "charge_start_threshold"
9330 #define STOP_ATTR  "charge_stop_threshold"
9331
9332 enum {
9333         BAT_ANY = 0,
9334         BAT_PRIMARY = 1,
9335         BAT_SECONDARY = 2
9336 };
9337
9338 enum {
9339         /* Error condition bit */
9340         METHOD_ERR = BIT(31),
9341 };
9342
9343 enum {
9344         /* This is used in the get/set helpers */
9345         THRESHOLD_START,
9346         THRESHOLD_STOP,
9347 };
9348
9349 struct tpacpi_battery_data {
9350         int charge_start;
9351         int start_support;
9352         int charge_stop;
9353         int stop_support;
9354 };
9355
9356 struct tpacpi_battery_driver_data {
9357         struct tpacpi_battery_data batteries[3];
9358         int individual_addressing;
9359 };
9360
9361 static struct tpacpi_battery_driver_data battery_info;
9362
9363 /* ACPI helpers/functions/probes */
9364
9365 /**
9366  * This evaluates a ACPI method call specific to the battery
9367  * ACPI extension. The specifics are that an error is marked
9368  * in the 32rd bit of the response, so we just check that here.
9369  */
9370 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9371 {
9372         int response;
9373
9374         if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9375                 acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9376                 return AE_ERROR;
9377         }
9378         if (response & METHOD_ERR) {
9379                 acpi_handle_err(hkey_handle,
9380                                 "%s evaluated but flagged as error", method);
9381                 return AE_ERROR;
9382         }
9383         *ret = response;
9384         return AE_OK;
9385 }
9386
9387 static int tpacpi_battery_get(int what, int battery, int *ret)
9388 {
9389         switch (what) {
9390         case THRESHOLD_START:
9391                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9392                         return -ENODEV;
9393
9394                 /* The value is in the low 8 bits of the response */
9395                 *ret = *ret & 0xFF;
9396                 return 0;
9397         case THRESHOLD_STOP:
9398                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9399                         return -ENODEV;
9400                 /* Value is in lower 8 bits */
9401                 *ret = *ret & 0xFF;
9402                 /*
9403                  * On the stop value, if we return 0 that
9404                  * does not make any sense. 0 means Default, which
9405                  * means that charging stops at 100%, so we return
9406                  * that.
9407                  */
9408                 if (*ret == 0)
9409                         *ret = 100;
9410                 return 0;
9411         default:
9412                 pr_crit("wrong parameter: %d", what);
9413                 return -EINVAL;
9414         }
9415 }
9416
9417 static int tpacpi_battery_set(int what, int battery, int value)
9418 {
9419         int param, ret;
9420         /* The first 8 bits are the value of the threshold */
9421         param = value;
9422         /* The battery ID is in bits 8-9, 2 bits */
9423         param |= battery << 8;
9424
9425         switch (what) {
9426         case THRESHOLD_START:
9427                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9428                         pr_err("failed to set charge threshold on battery %d",
9429                                         battery);
9430                         return -ENODEV;
9431                 }
9432                 return 0;
9433         case THRESHOLD_STOP:
9434                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9435                         pr_err("failed to set stop threshold: %d", battery);
9436                         return -ENODEV;
9437                 }
9438                 return 0;
9439         default:
9440                 pr_crit("wrong parameter: %d", what);
9441                 return -EINVAL;
9442         }
9443 }
9444
9445 static int tpacpi_battery_probe(int battery)
9446 {
9447         int ret = 0;
9448
9449         memset(&battery_info.batteries[battery], 0,
9450                 sizeof(battery_info.batteries[battery]));
9451
9452         /*
9453          * 1) Get the current start threshold
9454          * 2) Check for support
9455          * 3) Get the current stop threshold
9456          * 4) Check for support
9457          */
9458         if (acpi_has_method(hkey_handle, GET_START)) {
9459                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9460                         pr_err("Error probing battery %d\n", battery);
9461                         return -ENODEV;
9462                 }
9463                 /* Individual addressing is in bit 9 */
9464                 if (ret & BIT(9))
9465                         battery_info.individual_addressing = true;
9466                 /* Support is marked in bit 8 */
9467                 if (ret & BIT(8))
9468                         battery_info.batteries[battery].start_support = 1;
9469                 else
9470                         return -ENODEV;
9471                 if (tpacpi_battery_get(THRESHOLD_START, battery,
9472                         &battery_info.batteries[battery].charge_start)) {
9473                         pr_err("Error probing battery %d\n", battery);
9474                         return -ENODEV;
9475                 }
9476         }
9477         if (acpi_has_method(hkey_handle, GET_STOP)) {
9478                 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9479                         pr_err("Error probing battery stop; %d\n", battery);
9480                         return -ENODEV;
9481                 }
9482                 /* Support is marked in bit 8 */
9483                 if (ret & BIT(8))
9484                         battery_info.batteries[battery].stop_support = 1;
9485                 else
9486                         return -ENODEV;
9487                 if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9488                         &battery_info.batteries[battery].charge_stop)) {
9489                         pr_err("Error probing battery stop: %d\n", battery);
9490                         return -ENODEV;
9491                 }
9492         }
9493         pr_info("battery %d registered (start %d, stop %d)",
9494                         battery,
9495                         battery_info.batteries[battery].charge_start,
9496                         battery_info.batteries[battery].charge_stop);
9497
9498         return 0;
9499 }
9500
9501 /* General helper functions */
9502
9503 static int tpacpi_battery_get_id(const char *battery_name)
9504 {
9505
9506         if (strcmp(battery_name, "BAT0") == 0 ||
9507             tp_features.battery_force_primary)
9508                 return BAT_PRIMARY;
9509         if (strcmp(battery_name, "BAT1") == 0)
9510                 return BAT_SECONDARY;
9511         /*
9512          * If for some reason the battery is not BAT0 nor is it
9513          * BAT1, we will assume it's the default, first battery,
9514          * AKA primary.
9515          */
9516         pr_warn("unknown battery %s, assuming primary", battery_name);
9517         return BAT_PRIMARY;
9518 }
9519
9520 /* sysfs interface */
9521
9522 static ssize_t tpacpi_battery_store(int what,
9523                                     struct device *dev,
9524                                     const char *buf, size_t count)
9525 {
9526         struct power_supply *supply = to_power_supply(dev);
9527         unsigned long value;
9528         int battery, rval;
9529         /*
9530          * Some systems have support for more than
9531          * one battery. If that is the case,
9532          * tpacpi_battery_probe marked that addressing
9533          * them individually is supported, so we do that
9534          * based on the device struct.
9535          *
9536          * On systems that are not supported, we assume
9537          * the primary as most of the ACPI calls fail
9538          * with "Any Battery" as the parameter.
9539          */
9540         if (battery_info.individual_addressing)
9541                 /* BAT_PRIMARY or BAT_SECONDARY */
9542                 battery = tpacpi_battery_get_id(supply->desc->name);
9543         else
9544                 battery = BAT_PRIMARY;
9545
9546         rval = kstrtoul(buf, 10, &value);
9547         if (rval)
9548                 return rval;
9549
9550         switch (what) {
9551         case THRESHOLD_START:
9552                 if (!battery_info.batteries[battery].start_support)
9553                         return -ENODEV;
9554                 /* valid values are [0, 99] */
9555                 if (value < 0 || value > 99)
9556                         return -EINVAL;
9557                 if (value > battery_info.batteries[battery].charge_stop)
9558                         return -EINVAL;
9559                 if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9560                         return -ENODEV;
9561                 battery_info.batteries[battery].charge_start = value;
9562                 return count;
9563
9564         case THRESHOLD_STOP:
9565                 if (!battery_info.batteries[battery].stop_support)
9566                         return -ENODEV;
9567                 /* valid values are [1, 100] */
9568                 if (value < 1 || value > 100)
9569                         return -EINVAL;
9570                 if (value < battery_info.batteries[battery].charge_start)
9571                         return -EINVAL;
9572                 battery_info.batteries[battery].charge_stop = value;
9573                 /*
9574                  * When 100 is passed to stop, we need to flip
9575                  * it to 0 as that the EC understands that as
9576                  * "Default", which will charge to 100%
9577                  */
9578                 if (value == 100)
9579                         value = 0;
9580                 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9581                         return -EINVAL;
9582                 return count;
9583         default:
9584                 pr_crit("Wrong parameter: %d", what);
9585                 return -EINVAL;
9586         }
9587         return count;
9588 }
9589
9590 static ssize_t tpacpi_battery_show(int what,
9591                                    struct device *dev,
9592                                    char *buf)
9593 {
9594         struct power_supply *supply = to_power_supply(dev);
9595         int ret, battery;
9596         /*
9597          * Some systems have support for more than
9598          * one battery. If that is the case,
9599          * tpacpi_battery_probe marked that addressing
9600          * them individually is supported, so we;
9601          * based on the device struct.
9602          *
9603          * On systems that are not supported, we assume
9604          * the primary as most of the ACPI calls fail
9605          * with "Any Battery" as the parameter.
9606          */
9607         if (battery_info.individual_addressing)
9608                 /* BAT_PRIMARY or BAT_SECONDARY */
9609                 battery = tpacpi_battery_get_id(supply->desc->name);
9610         else
9611                 battery = BAT_PRIMARY;
9612         if (tpacpi_battery_get(what, battery, &ret))
9613                 return -ENODEV;
9614         return sprintf(buf, "%d\n", ret);
9615 }
9616
9617 static ssize_t charge_start_threshold_show(struct device *device,
9618                                 struct device_attribute *attr,
9619                                 char *buf)
9620 {
9621         return tpacpi_battery_show(THRESHOLD_START, device, buf);
9622 }
9623
9624 static ssize_t charge_stop_threshold_show(struct device *device,
9625                                 struct device_attribute *attr,
9626                                 char *buf)
9627 {
9628         return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9629 }
9630
9631 static ssize_t charge_start_threshold_store(struct device *dev,
9632                                 struct device_attribute *attr,
9633                                 const char *buf, size_t count)
9634 {
9635         return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9636 }
9637
9638 static ssize_t charge_stop_threshold_store(struct device *dev,
9639                                 struct device_attribute *attr,
9640                                 const char *buf, size_t count)
9641 {
9642         return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9643 }
9644
9645 static DEVICE_ATTR_RW(charge_start_threshold);
9646 static DEVICE_ATTR_RW(charge_stop_threshold);
9647
9648 static struct attribute *tpacpi_battery_attrs[] = {
9649         &dev_attr_charge_start_threshold.attr,
9650         &dev_attr_charge_stop_threshold.attr,
9651         NULL,
9652 };
9653
9654 ATTRIBUTE_GROUPS(tpacpi_battery);
9655
9656 /* ACPI battery hooking */
9657
9658 static int tpacpi_battery_add(struct power_supply *battery)
9659 {
9660         int batteryid = tpacpi_battery_get_id(battery->desc->name);
9661
9662         if (tpacpi_battery_probe(batteryid))
9663                 return -ENODEV;
9664         if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9665                 return -ENODEV;
9666         return 0;
9667 }
9668
9669 static int tpacpi_battery_remove(struct power_supply *battery)
9670 {
9671         device_remove_groups(&battery->dev, tpacpi_battery_groups);
9672         return 0;
9673 }
9674
9675 static struct acpi_battery_hook battery_hook = {
9676         .add_battery = tpacpi_battery_add,
9677         .remove_battery = tpacpi_battery_remove,
9678         .name = "ThinkPad Battery Extension",
9679 };
9680
9681 /* Subdriver init/exit */
9682
9683 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9684         /*
9685          * Individual addressing is broken on models that expose the
9686          * primary battery as BAT1.
9687          */
9688         TPACPI_Q_LNV('J', '7', true),       /* B5400 */
9689         TPACPI_Q_LNV('J', 'I', true),       /* Thinkpad 11e */
9690         TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9691         TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9692         TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9693 };
9694
9695 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9696 {
9697         memset(&battery_info, 0, sizeof(battery_info));
9698
9699         tp_features.battery_force_primary = tpacpi_check_quirks(
9700                                         battery_quirk_table,
9701                                         ARRAY_SIZE(battery_quirk_table));
9702
9703         battery_hook_register(&battery_hook);
9704         return 0;
9705 }
9706
9707 static void tpacpi_battery_exit(void)
9708 {
9709         battery_hook_unregister(&battery_hook);
9710 }
9711
9712 static struct ibm_struct battery_driver_data = {
9713         .name = "battery",
9714         .exit = tpacpi_battery_exit,
9715 };
9716
9717 /****************************************************************************
9718  ****************************************************************************
9719  *
9720  * Infrastructure
9721  *
9722  ****************************************************************************
9723  ****************************************************************************/
9724
9725 /*
9726  * HKEY event callout for other subdrivers go here
9727  * (yes, it is ugly, but it is quick, safe, and gets the job done
9728  */
9729 static void tpacpi_driver_event(const unsigned int hkey_event)
9730 {
9731         if (ibm_backlight_device) {
9732                 switch (hkey_event) {
9733                 case TP_HKEY_EV_BRGHT_UP:
9734                 case TP_HKEY_EV_BRGHT_DOWN:
9735                         tpacpi_brightness_notify_change();
9736                 }
9737         }
9738         if (alsa_card) {
9739                 switch (hkey_event) {
9740                 case TP_HKEY_EV_VOL_UP:
9741                 case TP_HKEY_EV_VOL_DOWN:
9742                 case TP_HKEY_EV_VOL_MUTE:
9743                         volume_alsa_notify_change();
9744                 }
9745         }
9746         if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
9747                 enum led_brightness brightness;
9748
9749                 mutex_lock(&kbdlight_mutex);
9750
9751                 /*
9752                  * Check the brightness actually changed, setting the brightness
9753                  * through kbdlight_set_level() also triggers this event.
9754                  */
9755                 brightness = kbdlight_sysfs_get(NULL);
9756                 if (kbdlight_brightness != brightness) {
9757                         kbdlight_brightness = brightness;
9758                         led_classdev_notify_brightness_hw_changed(
9759                                 &tpacpi_led_kbdlight.led_classdev, brightness);
9760                 }
9761
9762                 mutex_unlock(&kbdlight_mutex);
9763         }
9764 }
9765
9766 static void hotkey_driver_event(const unsigned int scancode)
9767 {
9768         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
9769 }
9770
9771 /* --------------------------------------------------------------------- */
9772
9773 /* /proc support */
9774 static struct proc_dir_entry *proc_dir;
9775
9776 /*
9777  * Module and infrastructure proble, init and exit handling
9778  */
9779
9780 static bool force_load;
9781
9782 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
9783 static const char * __init str_supported(int is_supported)
9784 {
9785         static char text_unsupported[] __initdata = "not supported";
9786
9787         return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
9788 }
9789 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
9790
9791 static void ibm_exit(struct ibm_struct *ibm)
9792 {
9793         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
9794
9795         list_del_init(&ibm->all_drivers);
9796
9797         if (ibm->flags.acpi_notify_installed) {
9798                 dbg_printk(TPACPI_DBG_EXIT,
9799                         "%s: acpi_remove_notify_handler\n", ibm->name);
9800                 BUG_ON(!ibm->acpi);
9801                 acpi_remove_notify_handler(*ibm->acpi->handle,
9802                                            ibm->acpi->type,
9803                                            dispatch_acpi_notify);
9804                 ibm->flags.acpi_notify_installed = 0;
9805         }
9806
9807         if (ibm->flags.proc_created) {
9808                 dbg_printk(TPACPI_DBG_EXIT,
9809                         "%s: remove_proc_entry\n", ibm->name);
9810                 remove_proc_entry(ibm->name, proc_dir);
9811                 ibm->flags.proc_created = 0;
9812         }
9813
9814         if (ibm->flags.acpi_driver_registered) {
9815                 dbg_printk(TPACPI_DBG_EXIT,
9816                         "%s: acpi_bus_unregister_driver\n", ibm->name);
9817                 BUG_ON(!ibm->acpi);
9818                 acpi_bus_unregister_driver(ibm->acpi->driver);
9819                 kfree(ibm->acpi->driver);
9820                 ibm->acpi->driver = NULL;
9821                 ibm->flags.acpi_driver_registered = 0;
9822         }
9823
9824         if (ibm->flags.init_called && ibm->exit) {
9825                 ibm->exit();
9826                 ibm->flags.init_called = 0;
9827         }
9828
9829         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
9830 }
9831
9832 static int __init ibm_init(struct ibm_init_struct *iibm)
9833 {
9834         int ret;
9835         struct ibm_struct *ibm = iibm->data;
9836         struct proc_dir_entry *entry;
9837
9838         BUG_ON(ibm == NULL);
9839
9840         INIT_LIST_HEAD(&ibm->all_drivers);
9841
9842         if (ibm->flags.experimental && !experimental)
9843                 return 0;
9844
9845         dbg_printk(TPACPI_DBG_INIT,
9846                 "probing for %s\n", ibm->name);
9847
9848         if (iibm->init) {
9849                 ret = iibm->init(iibm);
9850                 if (ret > 0)
9851                         return 0;       /* probe failed */
9852                 if (ret)
9853                         return ret;
9854
9855                 ibm->flags.init_called = 1;
9856         }
9857
9858         if (ibm->acpi) {
9859                 if (ibm->acpi->hid) {
9860                         ret = register_tpacpi_subdriver(ibm);
9861                         if (ret)
9862                                 goto err_out;
9863                 }
9864
9865                 if (ibm->acpi->notify) {
9866                         ret = setup_acpi_notify(ibm);
9867                         if (ret == -ENODEV) {
9868                                 pr_notice("disabling subdriver %s\n",
9869                                           ibm->name);
9870                                 ret = 0;
9871                                 goto err_out;
9872                         }
9873                         if (ret < 0)
9874                                 goto err_out;
9875                 }
9876         }
9877
9878         dbg_printk(TPACPI_DBG_INIT,
9879                 "%s installed\n", ibm->name);
9880
9881         if (ibm->read) {
9882                 umode_t mode = iibm->base_procfs_mode;
9883
9884                 if (!mode)
9885                         mode = S_IRUGO;
9886                 if (ibm->write)
9887                         mode |= S_IWUSR;
9888                 entry = proc_create_data(ibm->name, mode, proc_dir,
9889                                          &dispatch_proc_fops, ibm);
9890                 if (!entry) {
9891                         pr_err("unable to create proc entry %s\n", ibm->name);
9892                         ret = -ENODEV;
9893                         goto err_out;
9894                 }
9895                 ibm->flags.proc_created = 1;
9896         }
9897
9898         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
9899
9900         return 0;
9901
9902 err_out:
9903         dbg_printk(TPACPI_DBG_INIT,
9904                 "%s: at error exit path with result %d\n",
9905                 ibm->name, ret);
9906
9907         ibm_exit(ibm);
9908         return (ret < 0) ? ret : 0;
9909 }
9910
9911 /* Probing */
9912
9913 static char __init tpacpi_parse_fw_id(const char * const s,
9914                                       u32 *model, u16 *release)
9915 {
9916         int i;
9917
9918         if (!s || strlen(s) < 8)
9919                 goto invalid;
9920
9921         for (i = 0; i < 8; i++)
9922                 if (!((s[i] >= '0' && s[i] <= '9') ||
9923                       (s[i] >= 'A' && s[i] <= 'Z')))
9924                         goto invalid;
9925
9926         /*
9927          * Most models: xxyTkkWW (#.##c)
9928          * Ancient 570/600 and -SL lacks (#.##c)
9929          */
9930         if (s[3] == 'T' || s[3] == 'N') {
9931                 *model = TPID(s[0], s[1]);
9932                 *release = TPVER(s[4], s[5]);
9933                 return s[2];
9934
9935         /* New models: xxxyTkkW (#.##c); T550 and some others */
9936         } else if (s[4] == 'T' || s[4] == 'N') {
9937                 *model = TPID3(s[0], s[1], s[2]);
9938                 *release = TPVER(s[5], s[6]);
9939                 return s[3];
9940         }
9941
9942 invalid:
9943         return '\0';
9944 }
9945
9946 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
9947 {
9948         char *ec_fw_string = (char *) private;
9949         const char *dmi_data = (const char *)dm;
9950         /*
9951          * ThinkPad Embedded Controller Program Table on newer models
9952          *
9953          * Offset |  Name                | Width  | Description
9954          * ----------------------------------------------------
9955          *  0x00  | Type                 | BYTE   | 0x8C
9956          *  0x01  | Length               | BYTE   |
9957          *  0x02  | Handle               | WORD   | Varies
9958          *  0x04  | Signature            | BYTEx6 | ASCII for "LENOVO"
9959          *  0x0A  | OEM struct offset    | BYTE   | 0x0B
9960          *  0x0B  | OEM struct number    | BYTE   | 0x07, for this structure
9961          *  0x0C  | OEM struct revision  | BYTE   | 0x01, for this format
9962          *  0x0D  | ECP version ID       | STR ID |
9963          *  0x0E  | ECP release date     | STR ID |
9964          */
9965
9966         /* Return if data structure not match */
9967         if (dm->type != 140 || dm->length < 0x0F ||
9968         memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
9969         dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
9970         dmi_data[0x0C] != 0x01)
9971                 return;
9972
9973         /* fwstr is the first 8byte string  */
9974         strncpy(ec_fw_string, dmi_data + 0x0F, 8);
9975 }
9976
9977 /* returns 0 - probe ok, or < 0 - probe error.
9978  * Probe ok doesn't mean thinkpad found.
9979  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
9980 static int __must_check __init get_thinkpad_model_data(
9981                                                 struct thinkpad_id_data *tp)
9982 {
9983         const struct dmi_device *dev = NULL;
9984         char ec_fw_string[18] = {0};
9985         char const *s;
9986         char t;
9987
9988         if (!tp)
9989                 return -EINVAL;
9990
9991         memset(tp, 0, sizeof(*tp));
9992
9993         if (dmi_name_in_vendors("IBM"))
9994                 tp->vendor = PCI_VENDOR_ID_IBM;
9995         else if (dmi_name_in_vendors("LENOVO"))
9996                 tp->vendor = PCI_VENDOR_ID_LENOVO;
9997         else
9998                 return 0;
9999
10000         s = dmi_get_system_info(DMI_BIOS_VERSION);
10001         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
10002         if (s && !tp->bios_version_str)
10003                 return -ENOMEM;
10004
10005         /* Really ancient ThinkPad 240X will fail this, which is fine */
10006         t = tpacpi_parse_fw_id(tp->bios_version_str,
10007                                &tp->bios_model, &tp->bios_release);
10008         if (t != 'E' && t != 'C')
10009                 return 0;
10010
10011         /*
10012          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
10013          * X32 or newer, all Z series;  Some models must have an
10014          * up-to-date BIOS or they will not be detected.
10015          *
10016          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
10017          */
10018         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
10019                 if (sscanf(dev->name,
10020                            "IBM ThinkPad Embedded Controller -[%17c",
10021                            ec_fw_string) == 1) {
10022                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
10023                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
10024                         break;
10025                 }
10026         }
10027
10028         /* Newer ThinkPads have different EC program info table */
10029         if (!ec_fw_string[0])
10030                 dmi_walk(find_new_ec_fwstr, &ec_fw_string);
10031
10032         if (ec_fw_string[0]) {
10033                 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
10034                 if (!tp->ec_version_str)
10035                         return -ENOMEM;
10036
10037                 t = tpacpi_parse_fw_id(ec_fw_string,
10038                          &tp->ec_model, &tp->ec_release);
10039                 if (t != 'H') {
10040                         pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
10041                                   ec_fw_string);
10042                         pr_notice("please report this to %s\n", TPACPI_MAIL);
10043                 }
10044         }
10045
10046         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
10047         if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
10048                 tp->model_str = kstrdup(s, GFP_KERNEL);
10049                 if (!tp->model_str)
10050                         return -ENOMEM;
10051         } else {
10052                 s = dmi_get_system_info(DMI_BIOS_VENDOR);
10053                 if (s && !(strncasecmp(s, "Lenovo", 6))) {
10054                         tp->model_str = kstrdup(s, GFP_KERNEL);
10055                         if (!tp->model_str)
10056                                 return -ENOMEM;
10057                 }
10058         }
10059
10060         s = dmi_get_system_info(DMI_PRODUCT_NAME);
10061         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
10062         if (s && !tp->nummodel_str)
10063                 return -ENOMEM;
10064
10065         return 0;
10066 }
10067
10068 static int __init probe_for_thinkpad(void)
10069 {
10070         int is_thinkpad;
10071
10072         if (acpi_disabled)
10073                 return -ENODEV;
10074
10075         /* It would be dangerous to run the driver in this case */
10076         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
10077                 return -ENODEV;
10078
10079         /*
10080          * Non-ancient models have better DMI tagging, but very old models
10081          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
10082          */
10083         is_thinkpad = (thinkpad_id.model_str != NULL) ||
10084                       (thinkpad_id.ec_model != 0) ||
10085                       tpacpi_is_fw_known();
10086
10087         /* The EC handler is required */
10088         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
10089         if (!ec_handle) {
10090                 if (is_thinkpad)
10091                         pr_err("Not yet supported ThinkPad detected!\n");
10092                 return -ENODEV;
10093         }
10094
10095         if (!is_thinkpad && !force_load)
10096                 return -ENODEV;
10097
10098         return 0;
10099 }
10100
10101 static void __init thinkpad_acpi_init_banner(void)
10102 {
10103         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
10104         pr_info("%s\n", TPACPI_URL);
10105
10106         pr_info("ThinkPad BIOS %s, EC %s\n",
10107                 (thinkpad_id.bios_version_str) ?
10108                         thinkpad_id.bios_version_str : "unknown",
10109                 (thinkpad_id.ec_version_str) ?
10110                         thinkpad_id.ec_version_str : "unknown");
10111
10112         BUG_ON(!thinkpad_id.vendor);
10113
10114         if (thinkpad_id.model_str)
10115                 pr_info("%s %s, model %s\n",
10116                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
10117                                 "IBM" : ((thinkpad_id.vendor ==
10118                                                 PCI_VENDOR_ID_LENOVO) ?
10119                                         "Lenovo" : "Unknown vendor"),
10120                         thinkpad_id.model_str,
10121                         (thinkpad_id.nummodel_str) ?
10122                                 thinkpad_id.nummodel_str : "unknown");
10123 }
10124
10125 /* Module init, exit, parameters */
10126
10127 static struct ibm_init_struct ibms_init[] __initdata = {
10128         {
10129                 .data = &thinkpad_acpi_driver_data,
10130         },
10131         {
10132                 .init = hotkey_init,
10133                 .data = &hotkey_driver_data,
10134         },
10135         {
10136                 .init = bluetooth_init,
10137                 .data = &bluetooth_driver_data,
10138         },
10139         {
10140                 .init = wan_init,
10141                 .data = &wan_driver_data,
10142         },
10143         {
10144                 .init = uwb_init,
10145                 .data = &uwb_driver_data,
10146         },
10147 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
10148         {
10149                 .init = video_init,
10150                 .base_procfs_mode = S_IRUSR,
10151                 .data = &video_driver_data,
10152         },
10153 #endif
10154         {
10155                 .init = kbdlight_init,
10156                 .data = &kbdlight_driver_data,
10157         },
10158         {
10159                 .init = light_init,
10160                 .data = &light_driver_data,
10161         },
10162         {
10163                 .init = cmos_init,
10164                 .data = &cmos_driver_data,
10165         },
10166         {
10167                 .init = led_init,
10168                 .data = &led_driver_data,
10169         },
10170         {
10171                 .init = beep_init,
10172                 .data = &beep_driver_data,
10173         },
10174         {
10175                 .init = thermal_init,
10176                 .data = &thermal_driver_data,
10177         },
10178         {
10179                 .init = brightness_init,
10180                 .data = &brightness_driver_data,
10181         },
10182         {
10183                 .init = volume_init,
10184                 .data = &volume_driver_data,
10185         },
10186         {
10187                 .init = fan_init,
10188                 .data = &fan_driver_data,
10189         },
10190         {
10191                 .init = mute_led_init,
10192                 .data = &mute_led_driver_data,
10193         },
10194         {
10195                 .init = tpacpi_battery_init,
10196                 .data = &battery_driver_data,
10197         },
10198 };
10199
10200 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
10201 {
10202         unsigned int i;
10203         struct ibm_struct *ibm;
10204
10205         if (!kp || !kp->name || !val)
10206                 return -EINVAL;
10207
10208         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10209                 ibm = ibms_init[i].data;
10210                 WARN_ON(ibm == NULL);
10211
10212                 if (!ibm || !ibm->name)
10213                         continue;
10214
10215                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
10216                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
10217                                 return -ENOSPC;
10218                         strcpy(ibms_init[i].param, val);
10219                         strcat(ibms_init[i].param, ",");
10220                         return 0;
10221                 }
10222         }
10223
10224         return -EINVAL;
10225 }
10226
10227 module_param(experimental, int, 0444);
10228 MODULE_PARM_DESC(experimental,
10229                  "Enables experimental features when non-zero");
10230
10231 module_param_named(debug, dbg_level, uint, 0);
10232 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
10233
10234 module_param(force_load, bool, 0444);
10235 MODULE_PARM_DESC(force_load,
10236                  "Attempts to load the driver even on a mis-identified ThinkPad when true");
10237
10238 module_param_named(fan_control, fan_control_allowed, bool, 0444);
10239 MODULE_PARM_DESC(fan_control,
10240                  "Enables setting fan parameters features when true");
10241
10242 module_param_named(brightness_mode, brightness_mode, uint, 0444);
10243 MODULE_PARM_DESC(brightness_mode,
10244                  "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
10245
10246 module_param(brightness_enable, uint, 0444);
10247 MODULE_PARM_DESC(brightness_enable,
10248                  "Enables backlight control when 1, disables when 0");
10249
10250 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
10251 module_param_named(volume_mode, volume_mode, uint, 0444);
10252 MODULE_PARM_DESC(volume_mode,
10253                  "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
10254
10255 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
10256 MODULE_PARM_DESC(volume_capabilities,
10257                  "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
10258
10259 module_param_named(volume_control, volume_control_allowed, bool, 0444);
10260 MODULE_PARM_DESC(volume_control,
10261                  "Enables software override for the console audio control when true");
10262
10263 module_param_named(software_mute, software_mute_requested, bool, 0444);
10264 MODULE_PARM_DESC(software_mute,
10265                  "Request full software mute control");
10266
10267 /* ALSA module API parameters */
10268 module_param_named(index, alsa_index, int, 0444);
10269 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
10270 module_param_named(id, alsa_id, charp, 0444);
10271 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
10272 module_param_named(enable, alsa_enable, bool, 0444);
10273 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
10274 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
10275
10276 /* The module parameter can't be read back, that's why 0 is used here */
10277 #define TPACPI_PARAM(feature) \
10278         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
10279         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
10280
10281 TPACPI_PARAM(hotkey);
10282 TPACPI_PARAM(bluetooth);
10283 TPACPI_PARAM(video);
10284 TPACPI_PARAM(light);
10285 TPACPI_PARAM(cmos);
10286 TPACPI_PARAM(led);
10287 TPACPI_PARAM(beep);
10288 TPACPI_PARAM(brightness);
10289 TPACPI_PARAM(volume);
10290 TPACPI_PARAM(fan);
10291
10292 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10293 module_param(dbg_wlswemul, uint, 0444);
10294 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
10295 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
10296 MODULE_PARM_DESC(wlsw_state,
10297                  "Initial state of the emulated WLSW switch");
10298
10299 module_param(dbg_bluetoothemul, uint, 0444);
10300 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
10301 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
10302 MODULE_PARM_DESC(bluetooth_state,
10303                  "Initial state of the emulated bluetooth switch");
10304
10305 module_param(dbg_wwanemul, uint, 0444);
10306 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
10307 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
10308 MODULE_PARM_DESC(wwan_state,
10309                  "Initial state of the emulated WWAN switch");
10310
10311 module_param(dbg_uwbemul, uint, 0444);
10312 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
10313 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
10314 MODULE_PARM_DESC(uwb_state,
10315                  "Initial state of the emulated UWB switch");
10316 #endif
10317
10318 static void thinkpad_acpi_module_exit(void)
10319 {
10320         struct ibm_struct *ibm, *itmp;
10321
10322         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
10323
10324         list_for_each_entry_safe_reverse(ibm, itmp,
10325                                          &tpacpi_all_drivers,
10326                                          all_drivers) {
10327                 ibm_exit(ibm);
10328         }
10329
10330         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
10331
10332         if (tpacpi_inputdev) {
10333                 if (tp_features.input_device_registered)
10334                         input_unregister_device(tpacpi_inputdev);
10335                 else
10336                         input_free_device(tpacpi_inputdev);
10337                 kfree(hotkey_keycode_map);
10338         }
10339
10340         if (tpacpi_hwmon)
10341                 hwmon_device_unregister(tpacpi_hwmon);
10342
10343         if (tpacpi_sensors_pdev)
10344                 platform_device_unregister(tpacpi_sensors_pdev);
10345         if (tpacpi_pdev)
10346                 platform_device_unregister(tpacpi_pdev);
10347
10348         if (tp_features.sensors_pdrv_attrs_registered)
10349                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
10350         if (tp_features.platform_drv_attrs_registered)
10351                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
10352
10353         if (tp_features.sensors_pdrv_registered)
10354                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
10355
10356         if (tp_features.platform_drv_registered)
10357                 platform_driver_unregister(&tpacpi_pdriver);
10358
10359         if (proc_dir)
10360                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
10361
10362         if (tpacpi_wq)
10363                 destroy_workqueue(tpacpi_wq);
10364
10365         kfree(thinkpad_id.bios_version_str);
10366         kfree(thinkpad_id.ec_version_str);
10367         kfree(thinkpad_id.model_str);
10368         kfree(thinkpad_id.nummodel_str);
10369 }
10370
10371
10372 static int __init thinkpad_acpi_module_init(void)
10373 {
10374         int ret, i;
10375
10376         tpacpi_lifecycle = TPACPI_LIFE_INIT;
10377
10378         /* Driver-level probe */
10379
10380         ret = get_thinkpad_model_data(&thinkpad_id);
10381         if (ret) {
10382                 pr_err("unable to get DMI data: %d\n", ret);
10383                 thinkpad_acpi_module_exit();
10384                 return ret;
10385         }
10386         ret = probe_for_thinkpad();
10387         if (ret) {
10388                 thinkpad_acpi_module_exit();
10389                 return ret;
10390         }
10391
10392         /* Driver initialization */
10393
10394         thinkpad_acpi_init_banner();
10395         tpacpi_check_outdated_fw();
10396
10397         TPACPI_ACPIHANDLE_INIT(ecrd);
10398         TPACPI_ACPIHANDLE_INIT(ecwr);
10399
10400         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
10401         if (!tpacpi_wq) {
10402                 thinkpad_acpi_module_exit();
10403                 return -ENOMEM;
10404         }
10405
10406         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
10407         if (!proc_dir) {
10408                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
10409                 thinkpad_acpi_module_exit();
10410                 return -ENODEV;
10411         }
10412
10413         ret = platform_driver_register(&tpacpi_pdriver);
10414         if (ret) {
10415                 pr_err("unable to register main platform driver\n");
10416                 thinkpad_acpi_module_exit();
10417                 return ret;
10418         }
10419         tp_features.platform_drv_registered = 1;
10420
10421         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
10422         if (ret) {
10423                 pr_err("unable to register hwmon platform driver\n");
10424                 thinkpad_acpi_module_exit();
10425                 return ret;
10426         }
10427         tp_features.sensors_pdrv_registered = 1;
10428
10429         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
10430         if (!ret) {
10431                 tp_features.platform_drv_attrs_registered = 1;
10432                 ret = tpacpi_create_driver_attributes(
10433                                         &tpacpi_hwmon_pdriver.driver);
10434         }
10435         if (ret) {
10436                 pr_err("unable to create sysfs driver attributes\n");
10437                 thinkpad_acpi_module_exit();
10438                 return ret;
10439         }
10440         tp_features.sensors_pdrv_attrs_registered = 1;
10441
10442
10443         /* Device initialization */
10444         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
10445                                                         NULL, 0);
10446         if (IS_ERR(tpacpi_pdev)) {
10447                 ret = PTR_ERR(tpacpi_pdev);
10448                 tpacpi_pdev = NULL;
10449                 pr_err("unable to register platform device\n");
10450                 thinkpad_acpi_module_exit();
10451                 return ret;
10452         }
10453         tpacpi_sensors_pdev = platform_device_register_simple(
10454                                                 TPACPI_HWMON_DRVR_NAME,
10455                                                 -1, NULL, 0);
10456         if (IS_ERR(tpacpi_sensors_pdev)) {
10457                 ret = PTR_ERR(tpacpi_sensors_pdev);
10458                 tpacpi_sensors_pdev = NULL;
10459                 pr_err("unable to register hwmon platform device\n");
10460                 thinkpad_acpi_module_exit();
10461                 return ret;
10462         }
10463         tp_features.sensors_pdev_attrs_registered = 1;
10464         tpacpi_hwmon = hwmon_device_register_with_groups(
10465                 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL);
10466
10467         if (IS_ERR(tpacpi_hwmon)) {
10468                 ret = PTR_ERR(tpacpi_hwmon);
10469                 tpacpi_hwmon = NULL;
10470                 pr_err("unable to register hwmon device\n");
10471                 thinkpad_acpi_module_exit();
10472                 return ret;
10473         }
10474         mutex_init(&tpacpi_inputdev_send_mutex);
10475         tpacpi_inputdev = input_allocate_device();
10476         if (!tpacpi_inputdev) {
10477                 thinkpad_acpi_module_exit();
10478                 return -ENOMEM;
10479         } else {
10480                 /* Prepare input device, but don't register */
10481                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
10482                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
10483                 tpacpi_inputdev->id.bustype = BUS_HOST;
10484                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
10485                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
10486                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
10487                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
10488         }
10489
10490         /* Init subdriver dependencies */
10491         tpacpi_detect_brightness_capabilities();
10492
10493         /* Init subdrivers */
10494         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
10495                 ret = ibm_init(&ibms_init[i]);
10496                 if (ret >= 0 && *ibms_init[i].param)
10497                         ret = ibms_init[i].data->write(ibms_init[i].param);
10498                 if (ret < 0) {
10499                         thinkpad_acpi_module_exit();
10500                         return ret;
10501                 }
10502         }
10503
10504         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
10505
10506         ret = input_register_device(tpacpi_inputdev);
10507         if (ret < 0) {
10508                 pr_err("unable to register input device\n");
10509                 thinkpad_acpi_module_exit();
10510                 return ret;
10511         } else {
10512                 tp_features.input_device_registered = 1;
10513         }
10514
10515         return 0;
10516 }
10517
10518 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
10519
10520 /*
10521  * This will autoload the driver in almost every ThinkPad
10522  * in widespread use.
10523  *
10524  * Only _VERY_ old models, like the 240, 240x and 570 lack
10525  * the HKEY event interface.
10526  */
10527 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
10528
10529 /*
10530  * DMI matching for module autoloading
10531  *
10532  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
10533  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
10534  *
10535  * Only models listed in thinkwiki will be supported, so add yours
10536  * if it is not there yet.
10537  */
10538 #define IBM_BIOS_MODULE_ALIAS(__type) \
10539         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
10540
10541 /* Ancient thinkpad BIOSes have to be identified by
10542  * BIOS type or model number, and there are far less
10543  * BIOS types than model numbers... */
10544 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
10545
10546 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
10547 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
10548 MODULE_DESCRIPTION(TPACPI_DESC);
10549 MODULE_VERSION(TPACPI_VERSION);
10550 MODULE_LICENSE("GPL");
10551
10552 module_init(thinkpad_acpi_module_init);
10553 module_exit(thinkpad_acpi_module_exit);