drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   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  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.23"
  25 #define TPACPI_SYSFS_VERSION 0x020500
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 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_VOL_UP               = 0x1015, /* Volume up or unmute */
 155         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 156         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 157
 158         /* Reasons for waking up from S3/S4 */
 159         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 160         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 161         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 162         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 163         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 164         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 165
 166         /* Auto-sleep after eject request */
 167         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 168         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 169
 170         /* Misc bay events */
 171         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 172
 173         /* User-interface events */
 174         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 175         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 176         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 177         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 178         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 179         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 180         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 181
 182         /* Thermal events */
 183         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 184         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 185         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 186         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 187         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 188
 189         /* Misc */
 190         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 191 };
 192
 193 /****************************************************************************
 194  * Main driver
 195  */
 196
 197 #define TPACPI_NAME "thinkpad"
 198 #define TPACPI_DESC "ThinkPad ACPI Extras"
 199 #define TPACPI_FILE TPACPI_NAME "_acpi"
 200 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 201 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 202
 203 #define TPACPI_PROC_DIR "ibm"
 204 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 205 #define TPACPI_DRVR_NAME TPACPI_FILE
 206 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 207 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 208
 209 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 210 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 211
 212 #define TPACPI_MAX_ACPI_ARGS 3
 213
 214 /* printk headers */
 215 #define TPACPI_LOG TPACPI_FILE ": "
 216 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 217 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 218 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 219 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 220 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 221 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 222 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 223 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 224
 225 /* Debugging printk groups */
 226 #define TPACPI_DBG_ALL          0xffff
 227 #define TPACPI_DBG_DISCLOSETASK 0x8000
 228 #define TPACPI_DBG_INIT         0x0001
 229 #define TPACPI_DBG_EXIT         0x0002
 230 #define TPACPI_DBG_RFKILL       0x0004
 231 #define TPACPI_DBG_HKEY         0x0008
 232 #define TPACPI_DBG_FAN          0x0010
 233 #define TPACPI_DBG_BRGHT        0x0020
 234
 235 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 236 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 237 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 238
 239
 240 /****************************************************************************
 241  * Driver-wide structs and misc. variables
 242  */
 243
 244 struct ibm_struct;
 245
 246 struct tp_acpi_drv_struct {
 247         const struct acpi_device_id *hid;
 248         struct acpi_driver *driver;
 249
 250         void (*notify) (struct ibm_struct *, u32);
 251         acpi_handle *handle;
 252         u32 type;
 253         struct acpi_device *device;
 254 };
 255
 256 struct ibm_struct {
 257         char *name;
 258
 259         int (*read) (char *);
 260         int (*write) (char *);
 261         void (*exit) (void);
 262         void (*resume) (void);
 263         void (*suspend) (pm_message_t state);
 264         void (*shutdown) (void);
 265
 266         struct list_head all_drivers;
 267
 268         struct tp_acpi_drv_struct *acpi;
 269
 270         struct {
 271                 u8 acpi_driver_registered:1;
 272                 u8 acpi_notify_installed:1;
 273                 u8 proc_created:1;
 274                 u8 init_called:1;
 275                 u8 experimental:1;
 276         } flags;
 277 };
 278
 279 struct ibm_init_struct {
 280         char param[32];
 281
 282         int (*init) (struct ibm_init_struct *);
 283         struct ibm_struct *data;
 284 };
 285
 286 static struct {
 287         u32 bluetooth:1;
 288         u32 hotkey:1;
 289         u32 hotkey_mask:1;
 290         u32 hotkey_wlsw:1;
 291         u32 hotkey_tablet:1;
 292         u32 light:1;
 293         u32 light_status:1;
 294         u32 bright_16levels:1;
 295         u32 bright_acpimode:1;
 296         u32 wan:1;
 297         u32 uwb:1;
 298         u32 fan_ctrl_status_undef:1;
 299         u32 second_fan:1;
 300         u32 beep_needs_two_args:1;
 301         u32 input_device_registered:1;
 302         u32 platform_drv_registered:1;
 303         u32 platform_drv_attrs_registered:1;
 304         u32 sensors_pdrv_registered:1;
 305         u32 sensors_pdrv_attrs_registered:1;
 306         u32 sensors_pdev_attrs_registered:1;
 307         u32 hotkey_poll_active:1;
 308 } tp_features;
 309
 310 static struct {
 311         u16 hotkey_mask_ff:1;
 312 } tp_warned;
 313
 314 struct thinkpad_id_data {
 315         unsigned int vendor;    /* ThinkPad vendor:
 316                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 317
 318         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 319         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 320
 321         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 322         u16 ec_model;
 323         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 324         u16 ec_release;
 325
 326         char *model_str;        /* ThinkPad T43 */
 327         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 328 };
 329 static struct thinkpad_id_data thinkpad_id;
 330
 331 static enum {
 332         TPACPI_LIFE_INIT = 0,
 333         TPACPI_LIFE_RUNNING,
 334         TPACPI_LIFE_EXITING,
 335 } tpacpi_lifecycle;
 336
 337 static int experimental;
 338 static u32 dbg_level;
 339
 340 static struct workqueue_struct *tpacpi_wq;
 341
 342 enum led_status_t {
 343         TPACPI_LED_OFF = 0,
 344         TPACPI_LED_ON,
 345         TPACPI_LED_BLINK,
 346 };
 347
 348 /* Special LED class that can defer work */
 349 struct tpacpi_led_classdev {
 350         struct led_classdev led_classdev;
 351         struct work_struct work;
 352         enum led_status_t new_state;
 353         unsigned int led;
 354 };
 355
 356 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 357 static int dbg_wlswemul;
 358 static int tpacpi_wlsw_emulstate;
 359 static int dbg_bluetoothemul;
 360 static int tpacpi_bluetooth_emulstate;
 361 static int dbg_wwanemul;
 362 static int tpacpi_wwan_emulstate;
 363 static int dbg_uwbemul;
 364 static int tpacpi_uwb_emulstate;
 365 #endif
 366
 367
 368 /*************************************************************************
 369  *  Debugging helpers
 370  */
 371
 372 #define dbg_printk(a_dbg_level, format, arg...) \
 373         do { if (dbg_level & (a_dbg_level)) \
 374                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 375         } while (0)
 376
 377 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 378 #define vdbg_printk dbg_printk
 379 static const char *str_supported(int is_supported);
 380 #else
 381 #define vdbg_printk(a_dbg_level, format, arg...) \
 382         do { } while (0)
 383 #endif
 384
 385 static void tpacpi_log_usertask(const char * const what)
 386 {
 387         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 388                 what, task_tgid_vnr(current));
 389 }
 390
 391 #define tpacpi_disclose_usertask(what, format, arg...) \
 392         do { \
 393                 if (unlikely( \
 394                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 395                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 396                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 397                                 what, task_tgid_vnr(current), ## arg); \
 398                 } \
 399         } while (0)
 400
 401 /*
 402  * Quirk handling helpers
 403  *
 404  * ThinkPad IDs and versions seen in the field so far
 405  * are two-characters from the set [0-9A-Z], i.e. base 36.
 406  *
 407  * We use values well outside that range as specials.
 408  */
 409
 410 #define TPACPI_MATCH_ANY                0xffffU
 411 #define TPACPI_MATCH_UNKNOWN            0U
 412
 413 /* TPID('1', 'Y') == 0x5931 */
 414 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 415
 416 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 417         { .vendor = PCI_VENDOR_ID_IBM,          \
 418           .bios = TPID(__id1, __id2),           \
 419           .ec = TPACPI_MATCH_ANY,               \
 420           .quirks = (__quirk) }
 421
 422 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 423         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 424           .bios = TPID(__id1, __id2),           \
 425           .ec = TPACPI_MATCH_ANY,               \
 426           .quirks = (__quirk) }
 427
 428 struct tpacpi_quirk {
 429         unsigned int vendor;
 430         u16 bios;
 431         u16 ec;
 432         unsigned long quirks;
 433 };
 434
 435 /**
 436  * tpacpi_check_quirks() - search BIOS/EC version on a list
 437  * @qlist:              array of &struct tpacpi_quirk
 438  * @qlist_size:         number of elements in @qlist
 439  *
 440  * Iterates over a quirks list until one is found that matches the
 441  * ThinkPad's vendor, BIOS and EC model.
 442  *
 443  * Returns 0 if nothing matches, otherwise returns the quirks field of
 444  * the matching &struct tpacpi_quirk entry.
 445  *
 446  * The match criteria is: vendor, ec and bios much match.
 447  */
 448 static unsigned long __init tpacpi_check_quirks(
 449                         const struct tpacpi_quirk *qlist,
 450                         unsigned int qlist_size)
 451 {
 452         while (qlist_size) {
 453                 if ((qlist->vendor == thinkpad_id.vendor ||
 454                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 455                     (qlist->bios == thinkpad_id.bios_model ||
 456                                 qlist->bios == TPACPI_MATCH_ANY) &&
 457                     (qlist->ec == thinkpad_id.ec_model ||
 458                                 qlist->ec == TPACPI_MATCH_ANY))
 459                         return qlist->quirks;
 460
 461                 qlist_size--;
 462                 qlist++;
 463         }
 464         return 0;
 465 }
 466
 467
 468 /****************************************************************************
 469  ****************************************************************************
 470  *
 471  * ACPI Helpers and device model
 472  *
 473  ****************************************************************************
 474  ****************************************************************************/
 475
 476 /*************************************************************************
 477  * ACPI basic handles
 478  */
 479
 480 static acpi_handle root_handle;
 481
 482 #define TPACPI_HANDLE(object, parent, paths...)                 \
 483         static acpi_handle  object##_handle;                    \
 484         static acpi_handle *object##_parent = &parent##_handle; \
 485         static char        *object##_path;                      \
 486         static char        *object##_paths[] = { paths }
 487
 488 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 489            "\\_SB.PCI.ISA.EC",  /* 570 */
 490            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 491            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 492            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 493            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 494            "\\_SB.PCI0.LPC.EC", /* all others */
 495            );
 496
 497 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 498 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 499
 500 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 501                                         /* T4x, X31, X40 */
 502            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 503            "\\CMS",             /* R40, R40e */
 504            );                   /* all others */
 505
 506 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 507            "^HKEY",             /* R30, R31 */
 508            "HKEY",              /* all others */
 509            );                   /* 570 */
 510
 511 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 512            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 513            "\\_SB.PCI0.VID0",   /* 770e */
 514            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 515            "\\_SB.PCI0.AGP.VID",        /* all others */
 516            );                           /* R30, R31 */
 517
 518
 519 /*************************************************************************
 520  * ACPI helpers
 521  */
 522
 523 static int acpi_evalf(acpi_handle handle,
 524                       void *res, char *method, char *fmt, ...)
 525 {
 526         char *fmt0 = fmt;
 527         struct acpi_object_list params;
 528         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 529         struct acpi_buffer result, *resultp;
 530         union acpi_object out_obj;
 531         acpi_status status;
 532         va_list ap;
 533         char res_type;
 534         int success;
 535         int quiet;
 536
 537         if (!*fmt) {
 538                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 539                 return 0;
 540         }
 541
 542         if (*fmt == 'q') {
 543                 quiet = 1;
 544                 fmt++;
 545         } else
 546                 quiet = 0;
 547
 548         res_type = *(fmt++);
 549
 550         params.count = 0;
 551         params.pointer = &in_objs[0];
 552
 553         va_start(ap, fmt);
 554         while (*fmt) {
 555                 char c = *(fmt++);
 556                 switch (c) {
 557                 case 'd':       /* int */
 558                         in_objs[params.count].integer.value = va_arg(ap, int);
 559                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 560                         break;
 561                         /* add more types as needed */
 562                 default:
 563                         printk(TPACPI_ERR "acpi_evalf() called "
 564                                "with invalid format character '%c'\n", c);
 565                         return 0;
 566                 }
 567         }
 568         va_end(ap);
 569
 570         if (res_type != 'v') {
 571                 result.length = sizeof(out_obj);
 572                 result.pointer = &out_obj;
 573                 resultp = &result;
 574         } else
 575                 resultp = NULL;
 576
 577         status = acpi_evaluate_object(handle, method, &params, resultp);
 578
 579         switch (res_type) {
 580         case 'd':               /* int */
 581                 if (res)
 582                         *(int *)res = out_obj.integer.value;
 583                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 584                 break;
 585         case 'v':               /* void */
 586                 success = status == AE_OK;
 587                 break;
 588                 /* add more types as needed */
 589         default:
 590                 printk(TPACPI_ERR "acpi_evalf() called "
 591                        "with invalid format character '%c'\n", res_type);
 592                 return 0;
 593         }
 594
 595         if (!success && !quiet)
 596                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 597                        method, fmt0, status);
 598
 599         return success;
 600 }
 601
 602 static int acpi_ec_read(int i, u8 *p)
 603 {
 604         int v;
 605
 606         if (ecrd_handle) {
 607                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 608                         return 0;
 609                 *p = v;
 610         } else {
 611                 if (ec_read(i, p) < 0)
 612                         return 0;
 613         }
 614
 615         return 1;
 616 }
 617
 618 static int acpi_ec_write(int i, u8 v)
 619 {
 620         if (ecwr_handle) {
 621                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 622                         return 0;
 623         } else {
 624                 if (ec_write(i, v) < 0)
 625                         return 0;
 626         }
 627
 628         return 1;
 629 }
 630
 631 static int issue_thinkpad_cmos_command(int cmos_cmd)
 632 {
 633         if (!cmos_handle)
 634                 return -ENXIO;
 635
 636         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 637                 return -EIO;
 638
 639         return 0;
 640 }
 641
 642 /*************************************************************************
 643  * ACPI device model
 644  */
 645
 646 #define TPACPI_ACPIHANDLE_INIT(object) \
 647         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 648                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 649
 650 static void drv_acpi_handle_init(char *name,
 651                            acpi_handle *handle, acpi_handle parent,
 652                            char **paths, int num_paths, char **path)
 653 {
 654         int i;
 655         acpi_status status;
 656
 657         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 658                 name);
 659
 660         for (i = 0; i < num_paths; i++) {
 661                 status = acpi_get_handle(parent, paths[i], handle);
 662                 if (ACPI_SUCCESS(status)) {
 663                         *path = paths[i];
 664                         dbg_printk(TPACPI_DBG_INIT,
 665                                    "Found ACPI handle %s for %s\n",
 666                                    *path, name);
 667                         return;
 668                 }
 669         }
 670
 671         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 672                     name);
 673         *handle = NULL;
 674 }
 675
 676 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 677 {
 678         struct ibm_struct *ibm = data;
 679
 680         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 681                 return;
 682
 683         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 684                 return;
 685
 686         ibm->acpi->notify(ibm, event);
 687 }
 688
 689 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 690 {
 691         acpi_status status;
 692         int rc;
 693
 694         BUG_ON(!ibm->acpi);
 695
 696         if (!*ibm->acpi->handle)
 697                 return 0;
 698
 699         vdbg_printk(TPACPI_DBG_INIT,
 700                 "setting up ACPI notify for %s\n", ibm->name);
 701
 702         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 703         if (rc < 0) {
 704                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 705                         ibm->name, rc);
 706                 return -ENODEV;
 707         }
 708
 709         ibm->acpi->device->driver_data = ibm;
 710         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 711                 TPACPI_ACPI_EVENT_PREFIX,
 712                 ibm->name);
 713
 714         status = acpi_install_notify_handler(*ibm->acpi->handle,
 715                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 716         if (ACPI_FAILURE(status)) {
 717                 if (status == AE_ALREADY_EXISTS) {
 718                         printk(TPACPI_NOTICE
 719                                "another device driver is already "
 720                                "handling %s events\n", ibm->name);
 721                 } else {
 722                         printk(TPACPI_ERR
 723                                "acpi_install_notify_handler(%s) failed: %d\n",
 724                                ibm->name, status);
 725                 }
 726                 return -ENODEV;
 727         }
 728         ibm->flags.acpi_notify_installed = 1;
 729         return 0;
 730 }
 731
 732 static int __init tpacpi_device_add(struct acpi_device *device)
 733 {
 734         return 0;
 735 }
 736
 737 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 738 {
 739         int rc;
 740
 741         dbg_printk(TPACPI_DBG_INIT,
 742                 "registering %s as an ACPI driver\n", ibm->name);
 743
 744         BUG_ON(!ibm->acpi);
 745
 746         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 747         if (!ibm->acpi->driver) {
 748                 printk(TPACPI_ERR
 749                        "failed to allocate memory for ibm->acpi->driver\n");
 750                 return -ENOMEM;
 751         }
 752
 753         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 754         ibm->acpi->driver->ids = ibm->acpi->hid;
 755
 756         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 757
 758         rc = acpi_bus_register_driver(ibm->acpi->driver);
 759         if (rc < 0) {
 760                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 761                        ibm->name, rc);
 762                 kfree(ibm->acpi->driver);
 763                 ibm->acpi->driver = NULL;
 764         } else if (!rc)
 765                 ibm->flags.acpi_driver_registered = 1;
 766
 767         return rc;
 768 }
 769
 770
 771 /****************************************************************************
 772  ****************************************************************************
 773  *
 774  * Procfs Helpers
 775  *
 776  ****************************************************************************
 777  ****************************************************************************/
 778
 779 static int dispatch_procfs_read(char *page, char **start, off_t off,
 780                         int count, int *eof, void *data)
 781 {
 782         struct ibm_struct *ibm = data;
 783         int len;
 784
 785         if (!ibm || !ibm->read)
 786                 return -EINVAL;
 787
 788         len = ibm->read(page);
 789         if (len < 0)
 790                 return len;
 791
 792         if (len <= off + count)
 793                 *eof = 1;
 794         *start = page + off;
 795         len -= off;
 796         if (len > count)
 797                 len = count;
 798         if (len < 0)
 799                 len = 0;
 800
 801         return len;
 802 }
 803
 804 static int dispatch_procfs_write(struct file *file,
 805                         const char __user *userbuf,
 806                         unsigned long count, void *data)
 807 {
 808         struct ibm_struct *ibm = data;
 809         char *kernbuf;
 810         int ret;
 811
 812         if (!ibm || !ibm->write)
 813                 return -EINVAL;
 814         if (count > PAGE_SIZE - 2)
 815                 return -EINVAL;
 816
 817         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 818         if (!kernbuf)
 819                 return -ENOMEM;
 820
 821         if (copy_from_user(kernbuf, userbuf, count)) {
 822                 kfree(kernbuf);
 823                 return -EFAULT;
 824         }
 825
 826         kernbuf[count] = 0;
 827         strcat(kernbuf, ",");
 828         ret = ibm->write(kernbuf);
 829         if (ret == 0)
 830                 ret = count;
 831
 832         kfree(kernbuf);
 833
 834         return ret;
 835 }
 836
 837 static char *next_cmd(char **cmds)
 838 {
 839         char *start = *cmds;
 840         char *end;
 841
 842         while ((end = strchr(start, ',')) && end == start)
 843                 start = end + 1;
 844
 845         if (!end)
 846                 return NULL;
 847
 848         *end = 0;
 849         *cmds = end + 1;
 850         return start;
 851 }
 852
 853
 854 /****************************************************************************
 855  ****************************************************************************
 856  *
 857  * Device model: input, hwmon and platform
 858  *
 859  ****************************************************************************
 860  ****************************************************************************/
 861
 862 static struct platform_device *tpacpi_pdev;
 863 static struct platform_device *tpacpi_sensors_pdev;
 864 static struct device *tpacpi_hwmon;
 865 static struct input_dev *tpacpi_inputdev;
 866 static struct mutex tpacpi_inputdev_send_mutex;
 867 static LIST_HEAD(tpacpi_all_drivers);
 868
 869 static int tpacpi_suspend_handler(struct platform_device *pdev,
 870                                   pm_message_t state)
 871 {
 872         struct ibm_struct *ibm, *itmp;
 873
 874         list_for_each_entry_safe(ibm, itmp,
 875                                  &tpacpi_all_drivers,
 876                                  all_drivers) {
 877                 if (ibm->suspend)
 878                         (ibm->suspend)(state);
 879         }
 880
 881         return 0;
 882 }
 883
 884 static int tpacpi_resume_handler(struct platform_device *pdev)
 885 {
 886         struct ibm_struct *ibm, *itmp;
 887
 888         list_for_each_entry_safe(ibm, itmp,
 889                                  &tpacpi_all_drivers,
 890                                  all_drivers) {
 891                 if (ibm->resume)
 892                         (ibm->resume)();
 893         }
 894
 895         return 0;
 896 }
 897
 898 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 899 {
 900         struct ibm_struct *ibm, *itmp;
 901
 902         list_for_each_entry_safe(ibm, itmp,
 903                                  &tpacpi_all_drivers,
 904                                  all_drivers) {
 905                 if (ibm->shutdown)
 906                         (ibm->shutdown)();
 907         }
 908 }
 909
 910 static struct platform_driver tpacpi_pdriver = {
 911         .driver = {
 912                 .name = TPACPI_DRVR_NAME,
 913                 .owner = THIS_MODULE,
 914         },
 915         .suspend = tpacpi_suspend_handler,
 916         .resume = tpacpi_resume_handler,
 917         .shutdown = tpacpi_shutdown_handler,
 918 };
 919
 920 static struct platform_driver tpacpi_hwmon_pdriver = {
 921         .driver = {
 922                 .name = TPACPI_HWMON_DRVR_NAME,
 923                 .owner = THIS_MODULE,
 924         },
 925 };
 926
 927 /*************************************************************************
 928  * sysfs support helpers
 929  */
 930
 931 struct attribute_set {
 932         unsigned int members, max_members;
 933         struct attribute_group group;
 934 };
 935
 936 struct attribute_set_obj {
 937         struct attribute_set s;
 938         struct attribute *a;
 939 } __attribute__((packed));
 940
 941 static struct attribute_set *create_attr_set(unsigned int max_members,
 942                                                 const char *name)
 943 {
 944         struct attribute_set_obj *sobj;
 945
 946         if (max_members == 0)
 947                 return NULL;
 948
 949         /* Allocates space for implicit NULL at the end too */
 950         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 951                     max_members * sizeof(struct attribute *),
 952                     GFP_KERNEL);
 953         if (!sobj)
 954                 return NULL;
 955         sobj->s.max_members = max_members;
 956         sobj->s.group.attrs = &sobj->a;
 957         sobj->s.group.name = name;
 958
 959         return &sobj->s;
 960 }
 961
 962 #define destroy_attr_set(_set) \
 963         kfree(_set);
 964
 965 /* not multi-threaded safe, use it in a single thread per set */
 966 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 967 {
 968         if (!s || !attr)
 969                 return -EINVAL;
 970
 971         if (s->members >= s->max_members)
 972                 return -ENOMEM;
 973
 974         s->group.attrs[s->members] = attr;
 975         s->members++;
 976
 977         return 0;
 978 }
 979
 980 static int add_many_to_attr_set(struct attribute_set *s,
 981                         struct attribute **attr,
 982                         unsigned int count)
 983 {
 984         int i, res;
 985
 986         for (i = 0; i < count; i++) {
 987                 res = add_to_attr_set(s, attr[i]);
 988                 if (res)
 989                         return res;
 990         }
 991
 992         return 0;
 993 }
 994
 995 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 996 {
 997         sysfs_remove_group(kobj, &s->group);
 998         destroy_attr_set(s);
 999 }
1000
1001 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1002         sysfs_create_group(_kobj, &_attr_set->group)
1003
1004 static int parse_strtoul(const char *buf,
1005                 unsigned long max, unsigned long *value)
1006 {
1007         char *endp;
1008
1009         while (*buf && isspace(*buf))
1010                 buf++;
1011         *value = simple_strtoul(buf, &endp, 0);
1012         while (*endp && isspace(*endp))
1013                 endp++;
1014         if (*endp || *value > max)
1015                 return -EINVAL;
1016
1017         return 0;
1018 }
1019
1020 static void tpacpi_disable_brightness_delay(void)
1021 {
1022         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1023                 printk(TPACPI_NOTICE
1024                         "ACPI backlight control delay disabled\n");
1025 }
1026
1027 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1028 {
1029         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1030         union acpi_object *obj;
1031         int rc;
1032
1033         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1034                 obj = (union acpi_object *)buffer.pointer;
1035                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1036                         printk(TPACPI_ERR "Unknown _BCL data, "
1037                                "please report this to %s\n", TPACPI_MAIL);
1038                         rc = 0;
1039                 } else {
1040                         rc = obj->package.count;
1041                 }
1042         } else {
1043                 return 0;
1044         }
1045
1046         kfree(buffer.pointer);
1047         return rc;
1048 }
1049
1050 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1051                                         u32 lvl, void *context, void **rv)
1052 {
1053         char name[ACPI_PATH_SEGMENT_LENGTH];
1054         struct acpi_buffer buffer = { sizeof(name), &name };
1055
1056         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1057             !strncmp("_BCL", name, sizeof(name) - 1)) {
1058                 BUG_ON(!rv || !*rv);
1059                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1060                 return AE_CTRL_TERMINATE;
1061         } else {
1062                 return AE_OK;
1063         }
1064 }
1065
1066 /*
1067  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1068  */
1069 static int __init tpacpi_check_std_acpi_brightness_support(void)
1070 {
1071         int status;
1072         int bcl_levels = 0;
1073         void *bcl_ptr = &bcl_levels;
1074
1075         if (!vid_handle) {
1076                 TPACPI_ACPIHANDLE_INIT(vid);
1077         }
1078         if (!vid_handle)
1079                 return 0;
1080
1081         /*
1082          * Search for a _BCL method, and execute it.  This is safe on all
1083          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1084          * BIOS in ACPI backlight control mode.  We do NOT have to care
1085          * about calling the _BCL method in an enabled video device, any
1086          * will do for our purposes.
1087          */
1088
1089         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1090                                      tpacpi_acpi_walk_find_bcl, NULL,
1091                                      &bcl_ptr);
1092
1093         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1094                 tp_features.bright_acpimode = 1;
1095                 return (bcl_levels - 2);
1096         }
1097
1098         return 0;
1099 }
1100
1101 static void printk_deprecated_attribute(const char * const what,
1102                                         const char * const details)
1103 {
1104         tpacpi_log_usertask("deprecated sysfs attribute");
1105         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1106                 "will be removed. %s\n",
1107                 what, details);
1108 }
1109
1110 /*************************************************************************
1111  * rfkill and radio control support helpers
1112  */
1113
1114 /*
1115  * ThinkPad-ACPI firmware handling model:
1116  *
1117  * WLSW (master wireless switch) is event-driven, and is common to all
1118  * firmware-controlled radios.  It cannot be controlled, just monitored,
1119  * as expected.  It overrides all radio state in firmware
1120  *
1121  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1122  * (TODO: verify how WLSW interacts with the returned radio state).
1123  *
1124  * The only time there are shadow radio state changes, is when
1125  * masked-off hotkeys are used.
1126  */
1127
1128 /*
1129  * Internal driver API for radio state:
1130  *
1131  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1132  * bool: true means radio blocked (off)
1133  */
1134 enum tpacpi_rfkill_state {
1135         TPACPI_RFK_RADIO_OFF = 0,
1136         TPACPI_RFK_RADIO_ON
1137 };
1138
1139 /* rfkill switches */
1140 enum tpacpi_rfk_id {
1141         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1142         TPACPI_RFK_WWAN_SW_ID,
1143         TPACPI_RFK_UWB_SW_ID,
1144         TPACPI_RFK_SW_MAX
1145 };
1146
1147 static const char *tpacpi_rfkill_names[] = {
1148         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1149         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1150         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1151         [TPACPI_RFK_SW_MAX] = NULL
1152 };
1153
1154 /* ThinkPad-ACPI rfkill subdriver */
1155 struct tpacpi_rfk {
1156         struct rfkill *rfkill;
1157         enum tpacpi_rfk_id id;
1158         const struct tpacpi_rfk_ops *ops;
1159 };
1160
1161 struct tpacpi_rfk_ops {
1162         /* firmware interface */
1163         int (*get_status)(void);
1164         int (*set_status)(const enum tpacpi_rfkill_state);
1165 };
1166
1167 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1168
1169 /* Query FW and update rfkill sw state for a given rfkill switch */
1170 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1171 {
1172         int status;
1173
1174         if (!tp_rfk)
1175                 return -ENODEV;
1176
1177         status = (tp_rfk->ops->get_status)();
1178         if (status < 0)
1179                 return status;
1180
1181         rfkill_set_sw_state(tp_rfk->rfkill,
1182                             (status == TPACPI_RFK_RADIO_OFF));
1183
1184         return status;
1185 }
1186
1187 /* Query FW and update rfkill sw state for all rfkill switches */
1188 static void tpacpi_rfk_update_swstate_all(void)
1189 {
1190         unsigned int i;
1191
1192         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1193                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1194 }
1195
1196 /*
1197  * Sync the HW-blocking state of all rfkill switches,
1198  * do notice it causes the rfkill core to schedule uevents
1199  */
1200 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1201 {
1202         unsigned int i;
1203         struct tpacpi_rfk *tp_rfk;
1204
1205         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1206                 tp_rfk = tpacpi_rfkill_switches[i];
1207                 if (tp_rfk) {
1208                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1209                                                 blocked)) {
1210                                 /* ignore -- we track sw block */
1211                         }
1212                 }
1213         }
1214 }
1215
1216 /* Call to get the WLSW state from the firmware */
1217 static int hotkey_get_wlsw(void);
1218
1219 /* Call to query WLSW state and update all rfkill switches */
1220 static bool tpacpi_rfk_check_hwblock_state(void)
1221 {
1222         int res = hotkey_get_wlsw();
1223         int hw_blocked;
1224
1225         /* When unknown or unsupported, we have to assume it is unblocked */
1226         if (res < 0)
1227                 return false;
1228
1229         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1230         tpacpi_rfk_update_hwblock_state(hw_blocked);
1231
1232         return hw_blocked;
1233 }
1234
1235 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1236 {
1237         struct tpacpi_rfk *tp_rfk = data;
1238         int res;
1239
1240         dbg_printk(TPACPI_DBG_RFKILL,
1241                    "request to change radio state to %s\n",
1242                    blocked ? "blocked" : "unblocked");
1243
1244         /* try to set radio state */
1245         res = (tp_rfk->ops->set_status)(blocked ?
1246                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1247
1248         /* and update the rfkill core with whatever the FW really did */
1249         tpacpi_rfk_update_swstate(tp_rfk);
1250
1251         return (res < 0) ? res : 0;
1252 }
1253
1254 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1255         .set_block = tpacpi_rfk_hook_set_block,
1256 };
1257
1258 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1259                         const struct tpacpi_rfk_ops *tp_rfkops,
1260                         const enum rfkill_type rfktype,
1261                         const char *name,
1262                         const bool set_default)
1263 {
1264         struct tpacpi_rfk *atp_rfk;
1265         int res;
1266         bool sw_state = false;
1267         int sw_status;
1268
1269         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1270
1271         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1272         if (atp_rfk)
1273                 atp_rfk->rfkill = rfkill_alloc(name,
1274                                                 &tpacpi_pdev->dev,
1275                                                 rfktype,
1276                                                 &tpacpi_rfk_rfkill_ops,
1277                                                 atp_rfk);
1278         if (!atp_rfk || !atp_rfk->rfkill) {
1279                 printk(TPACPI_ERR
1280                         "failed to allocate memory for rfkill class\n");
1281                 kfree(atp_rfk);
1282                 return -ENOMEM;
1283         }
1284
1285         atp_rfk->id = id;
1286         atp_rfk->ops = tp_rfkops;
1287
1288         sw_status = (tp_rfkops->get_status)();
1289         if (sw_status < 0) {
1290                 printk(TPACPI_ERR
1291                         "failed to read initial state for %s, error %d\n",
1292                         name, sw_status);
1293         } else {
1294                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1295                 if (set_default) {
1296                         /* try to keep the initial state, since we ask the
1297                          * firmware to preserve it across S5 in NVRAM */
1298                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1299                 }
1300         }
1301         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1302
1303         res = rfkill_register(atp_rfk->rfkill);
1304         if (res < 0) {
1305                 printk(TPACPI_ERR
1306                         "failed to register %s rfkill switch: %d\n",
1307                         name, res);
1308                 rfkill_destroy(atp_rfk->rfkill);
1309                 kfree(atp_rfk);
1310                 return res;
1311         }
1312
1313         tpacpi_rfkill_switches[id] = atp_rfk;
1314         return 0;
1315 }
1316
1317 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1318 {
1319         struct tpacpi_rfk *tp_rfk;
1320
1321         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1322
1323         tp_rfk = tpacpi_rfkill_switches[id];
1324         if (tp_rfk) {
1325                 rfkill_unregister(tp_rfk->rfkill);
1326                 rfkill_destroy(tp_rfk->rfkill);
1327                 tpacpi_rfkill_switches[id] = NULL;
1328                 kfree(tp_rfk);
1329         }
1330 }
1331
1332 static void printk_deprecated_rfkill_attribute(const char * const what)
1333 {
1334         printk_deprecated_attribute(what,
1335                         "Please switch to generic rfkill before year 2010");
1336 }
1337
1338 /* sysfs <radio> enable ------------------------------------------------ */
1339 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1340                                             struct device_attribute *attr,
1341                                             char *buf)
1342 {
1343         int status;
1344
1345         printk_deprecated_rfkill_attribute(attr->attr.name);
1346
1347         /* This is in the ABI... */
1348         if (tpacpi_rfk_check_hwblock_state()) {
1349                 status = TPACPI_RFK_RADIO_OFF;
1350         } else {
1351                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1352                 if (status < 0)
1353                         return status;
1354         }
1355
1356         return snprintf(buf, PAGE_SIZE, "%d\n",
1357                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1358 }
1359
1360 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1361                             struct device_attribute *attr,
1362                             const char *buf, size_t count)
1363 {
1364         unsigned long t;
1365         int res;
1366
1367         printk_deprecated_rfkill_attribute(attr->attr.name);
1368
1369         if (parse_strtoul(buf, 1, &t))
1370                 return -EINVAL;
1371
1372         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1373
1374         /* This is in the ABI... */
1375         if (tpacpi_rfk_check_hwblock_state() && !!t)
1376                 return -EPERM;
1377
1378         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1379                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1380         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1381
1382         return (res < 0) ? res : count;
1383 }
1384
1385 /* procfs -------------------------------------------------------------- */
1386 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1387 {
1388         int len = 0;
1389
1390         if (id >= TPACPI_RFK_SW_MAX)
1391                 len += sprintf(p + len, "status:\t\tnot supported\n");
1392         else {
1393                 int status;
1394
1395                 /* This is in the ABI... */
1396                 if (tpacpi_rfk_check_hwblock_state()) {
1397                         status = TPACPI_RFK_RADIO_OFF;
1398                 } else {
1399                         status = tpacpi_rfk_update_swstate(
1400                                                 tpacpi_rfkill_switches[id]);
1401                         if (status < 0)
1402                                 return status;
1403                 }
1404
1405                 len += sprintf(p + len, "status:\t\t%s\n",
1406                                 (status == TPACPI_RFK_RADIO_ON) ?
1407                                         "enabled" : "disabled");
1408                 len += sprintf(p + len, "commands:\tenable, disable\n");
1409         }
1410
1411         return len;
1412 }
1413
1414 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1415 {
1416         char *cmd;
1417         int status = -1;
1418         int res = 0;
1419
1420         if (id >= TPACPI_RFK_SW_MAX)
1421                 return -ENODEV;
1422
1423         while ((cmd = next_cmd(&buf))) {
1424                 if (strlencmp(cmd, "enable") == 0)
1425                         status = TPACPI_RFK_RADIO_ON;
1426                 else if (strlencmp(cmd, "disable") == 0)
1427                         status = TPACPI_RFK_RADIO_OFF;
1428                 else
1429                         return -EINVAL;
1430         }
1431
1432         if (status != -1) {
1433                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1434                                 (status == TPACPI_RFK_RADIO_ON) ?
1435                                                 "enable" : "disable",
1436                                 tpacpi_rfkill_names[id]);
1437                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1438                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1439         }
1440
1441         return res;
1442 }
1443
1444 /*************************************************************************
1445  * thinkpad-acpi driver attributes
1446  */
1447
1448 /* interface_version --------------------------------------------------- */
1449 static ssize_t tpacpi_driver_interface_version_show(
1450                                 struct device_driver *drv,
1451                                 char *buf)
1452 {
1453         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1454 }
1455
1456 static DRIVER_ATTR(interface_version, S_IRUGO,
1457                 tpacpi_driver_interface_version_show, NULL);
1458
1459 /* debug_level --------------------------------------------------------- */
1460 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1461                                                 char *buf)
1462 {
1463         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1464 }
1465
1466 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1467                                                 const char *buf, size_t count)
1468 {
1469         unsigned long t;
1470
1471         if (parse_strtoul(buf, 0xffff, &t))
1472                 return -EINVAL;
1473
1474         dbg_level = t;
1475
1476         return count;
1477 }
1478
1479 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1480                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1481
1482 /* version ------------------------------------------------------------- */
1483 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1484                                                 char *buf)
1485 {
1486         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1487                         TPACPI_DESC, TPACPI_VERSION);
1488 }
1489
1490 static DRIVER_ATTR(version, S_IRUGO,
1491                 tpacpi_driver_version_show, NULL);
1492
1493 /* --------------------------------------------------------------------- */
1494
1495 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1496
1497 /* wlsw_emulstate ------------------------------------------------------ */
1498 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1499                                                 char *buf)
1500 {
1501         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1502 }
1503
1504 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1505                                                 const char *buf, size_t count)
1506 {
1507         unsigned long t;
1508
1509         if (parse_strtoul(buf, 1, &t))
1510                 return -EINVAL;
1511
1512         if (tpacpi_wlsw_emulstate != !!t) {
1513                 tpacpi_wlsw_emulstate = !!t;
1514                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1515         }
1516
1517         return count;
1518 }
1519
1520 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1521                 tpacpi_driver_wlsw_emulstate_show,
1522                 tpacpi_driver_wlsw_emulstate_store);
1523
1524 /* bluetooth_emulstate ------------------------------------------------- */
1525 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1526                                         struct device_driver *drv,
1527                                         char *buf)
1528 {
1529         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1530 }
1531
1532 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1533                                         struct device_driver *drv,
1534                                         const char *buf, size_t count)
1535 {
1536         unsigned long t;
1537
1538         if (parse_strtoul(buf, 1, &t))
1539                 return -EINVAL;
1540
1541         tpacpi_bluetooth_emulstate = !!t;
1542
1543         return count;
1544 }
1545
1546 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1547                 tpacpi_driver_bluetooth_emulstate_show,
1548                 tpacpi_driver_bluetooth_emulstate_store);
1549
1550 /* wwan_emulstate ------------------------------------------------- */
1551 static ssize_t tpacpi_driver_wwan_emulstate_show(
1552                                         struct device_driver *drv,
1553                                         char *buf)
1554 {
1555         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1556 }
1557
1558 static ssize_t tpacpi_driver_wwan_emulstate_store(
1559                                         struct device_driver *drv,
1560                                         const char *buf, size_t count)
1561 {
1562         unsigned long t;
1563
1564         if (parse_strtoul(buf, 1, &t))
1565                 return -EINVAL;
1566
1567         tpacpi_wwan_emulstate = !!t;
1568
1569         return count;
1570 }
1571
1572 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1573                 tpacpi_driver_wwan_emulstate_show,
1574                 tpacpi_driver_wwan_emulstate_store);
1575
1576 /* uwb_emulstate ------------------------------------------------- */
1577 static ssize_t tpacpi_driver_uwb_emulstate_show(
1578                                         struct device_driver *drv,
1579                                         char *buf)
1580 {
1581         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1582 }
1583
1584 static ssize_t tpacpi_driver_uwb_emulstate_store(
1585                                         struct device_driver *drv,
1586                                         const char *buf, size_t count)
1587 {
1588         unsigned long t;
1589
1590         if (parse_strtoul(buf, 1, &t))
1591                 return -EINVAL;
1592
1593         tpacpi_uwb_emulstate = !!t;
1594
1595         return count;
1596 }
1597
1598 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1599                 tpacpi_driver_uwb_emulstate_show,
1600                 tpacpi_driver_uwb_emulstate_store);
1601 #endif
1602
1603 /* --------------------------------------------------------------------- */
1604
1605 static struct driver_attribute *tpacpi_driver_attributes[] = {
1606         &driver_attr_debug_level, &driver_attr_version,
1607         &driver_attr_interface_version,
1608 };
1609
1610 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1611 {
1612         int i, res;
1613
1614         i = 0;
1615         res = 0;
1616         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1617                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1618                 i++;
1619         }
1620
1621 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1622         if (!res && dbg_wlswemul)
1623                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1624         if (!res && dbg_bluetoothemul)
1625                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1626         if (!res && dbg_wwanemul)
1627                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1628         if (!res && dbg_uwbemul)
1629                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1630 #endif
1631
1632         return res;
1633 }
1634
1635 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1636 {
1637         int i;
1638
1639         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1640                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1641
1642 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1643         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1644         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1645         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1646         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1647 #endif
1648 }
1649
1650 /*************************************************************************
1651  * Firmware Data
1652  */
1653
1654 /*
1655  * Table of recommended minimum BIOS versions
1656  *
1657  * Reasons for listing:
1658  *    1. Stable BIOS, listed because the unknown ammount of
1659  *       bugs and bad ACPI behaviour on older versions
1660  *
1661  *    2. BIOS or EC fw with known bugs that trigger on Linux
1662  *
1663  *    3. BIOS with known reduced functionality in older versions
1664  *
1665  *  We recommend the latest BIOS and EC version.
1666  *  We only support the latest BIOS and EC fw version as a rule.
1667  *
1668  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1669  *  Information from users in ThinkWiki
1670  *
1671  *  WARNING: we use this table also to detect that the machine is
1672  *  a ThinkPad in some cases, so don't remove entries lightly.
1673  */
1674
1675 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1676         { .vendor       = (__v),                        \
1677           .bios         = TPID(__id1, __id2),           \
1678           .ec           = TPACPI_MATCH_ANY,             \
1679           .quirks       = TPACPI_MATCH_ANY << 16        \
1680                           | (__bv1) << 8 | (__bv2) }
1681
1682 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1683                 __eid, __ev1, __ev2)                    \
1684         { .vendor       = (__v),                        \
1685           .bios         = TPID(__bid1, __bid2),         \
1686           .ec           = __eid,                        \
1687           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1688                           | (__bv1) << 8 | (__bv2) }
1689
1690 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1691         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1692
1693 /* Outdated IBM BIOSes often lack the EC id string */
1694 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1696                 __bv1, __bv2, TPID(__id1, __id2),       \
1697                 __ev1, __ev2),                          \
1698         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1699                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1700                 __ev1, __ev2)
1701
1702 /* Outdated IBM BIOSes often lack the EC id string */
1703 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1704                 __eid1, __eid2, __ev1, __ev2)           \
1705         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1706                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1707                 __ev1, __ev2),                          \
1708         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1709                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1710                 __ev1, __ev2)
1711
1712 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1713         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1714
1715 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1716         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1717                 __bv1, __bv2, TPID(__id1, __id2),       \
1718                 __ev1, __ev2)
1719
1720 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1721                 __eid1, __eid2, __ev1, __ev2)           \
1722         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1723                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1724                 __ev1, __ev2)
1725
1726 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1727         /*  Numeric models ------------------ */
1728         /*      FW MODEL   BIOS VERS          */
1729         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1730         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1731         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1732         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1733         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1734         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1735         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1736         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1737         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1738
1739         /* A-series ------------------------- */
1740         /*      FW MODEL   BIOS VERS  EC VERS */
1741         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1742         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1743         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1744         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1745         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1746         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1747         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1748         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1749         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1750         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1751         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1752
1753         /* G-series ------------------------- */
1754         /*      FW MODEL   BIOS VERS          */
1755         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1756         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1757
1758         /* R-series, T-series --------------- */
1759         /*      FW MODEL   BIOS VERS  EC VERS */
1760         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1761         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1762         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1763         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1764         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1765         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1766         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1767                                                     T40/p, T41/p, T42/p (1) */
1768         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1769         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1770         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1771         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1772
1773         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1774         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1775         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1776         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1777         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1778         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1779
1780         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1781         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1782         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1783
1784         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1785         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1786         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1787
1788         /* X-series ------------------------- */
1789         /*      FW MODEL   BIOS VERS  EC VERS */
1790         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1791         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1792         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1793         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1794         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1795         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1796         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1797
1798         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1799         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1800
1801         /* (0) - older versions lack DMI EC fw string and functionality */
1802         /* (1) - older versions known to lack functionality */
1803 };
1804
1805 #undef TPV_QL1
1806 #undef TPV_QL0
1807 #undef TPV_QI2
1808 #undef TPV_QI1
1809 #undef TPV_QI0
1810 #undef TPV_Q_X
1811 #undef TPV_Q
1812
1813 static void __init tpacpi_check_outdated_fw(void)
1814 {
1815         unsigned long fwvers;
1816         u16 ec_version, bios_version;
1817
1818         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1819                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1820
1821         if (!fwvers)
1822                 return;
1823
1824         bios_version = fwvers & 0xffffU;
1825         ec_version = (fwvers >> 16) & 0xffffU;
1826
1827         /* note that unknown versions are set to 0x0000 and we use that */
1828         if ((bios_version > thinkpad_id.bios_release) ||
1829             (ec_version > thinkpad_id.ec_release &&
1830                                 ec_version != TPACPI_MATCH_ANY)) {
1831                 /*
1832                  * The changelogs would let us track down the exact
1833                  * reason, but it is just too much of a pain to track
1834                  * it.  We only list BIOSes that are either really
1835                  * broken, or really stable to begin with, so it is
1836                  * best if the user upgrades the firmware anyway.
1837                  */
1838                 printk(TPACPI_WARN
1839                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1840                 printk(TPACPI_WARN
1841                         "WARNING: This firmware may be missing critical bug "
1842                         "fixes and/or important features\n");
1843         }
1844 }
1845
1846 static bool __init tpacpi_is_fw_known(void)
1847 {
1848         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1849                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1850 }
1851
1852 /****************************************************************************
1853  ****************************************************************************
1854  *
1855  * Subdrivers
1856  *
1857  ****************************************************************************
1858  ****************************************************************************/
1859
1860 /*************************************************************************
1861  * thinkpad-acpi init subdriver
1862  */
1863
1864 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1865 {
1866         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1867         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1868
1869         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1870                 (thinkpad_id.bios_version_str) ?
1871                         thinkpad_id.bios_version_str : "unknown",
1872                 (thinkpad_id.ec_version_str) ?
1873                         thinkpad_id.ec_version_str : "unknown");
1874
1875         if (thinkpad_id.vendor && thinkpad_id.model_str)
1876                 printk(TPACPI_INFO "%s %s, model %s\n",
1877                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1878                                 "IBM" : ((thinkpad_id.vendor ==
1879                                                 PCI_VENDOR_ID_LENOVO) ?
1880                                         "Lenovo" : "Unknown vendor"),
1881                         thinkpad_id.model_str,
1882                         (thinkpad_id.nummodel_str) ?
1883                                 thinkpad_id.nummodel_str : "unknown");
1884
1885         tpacpi_check_outdated_fw();
1886         return 0;
1887 }
1888
1889 static int thinkpad_acpi_driver_read(char *p)
1890 {
1891         int len = 0;
1892
1893         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1894         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1895
1896         return len;
1897 }
1898
1899 static struct ibm_struct thinkpad_acpi_driver_data = {
1900         .name = "driver",
1901         .read = thinkpad_acpi_driver_read,
1902 };
1903
1904 /*************************************************************************
1905  * Hotkey subdriver
1906  */
1907
1908 /*
1909  * ThinkPad firmware event model
1910  *
1911  * The ThinkPad firmware has two main event interfaces: normal ACPI
1912  * notifications (which follow the ACPI standard), and a private event
1913  * interface.
1914  *
1915  * The private event interface also issues events for the hotkeys.  As
1916  * the driver gained features, the event handling code ended up being
1917  * built around the hotkey subdriver.  This will need to be refactored
1918  * to a more formal event API eventually.
1919  *
1920  * Some "hotkeys" are actually supposed to be used as event reports,
1921  * such as "brightness has changed", "volume has changed", depending on
1922  * the ThinkPad model and how the firmware is operating.
1923  *
1924  * Unlike other classes, hotkey-class events have mask/unmask control on
1925  * non-ancient firmware.  However, how it behaves changes a lot with the
1926  * firmware model and version.
1927  */
1928
1929 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1930         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1931         TP_ACPI_HOTKEYSCAN_FNF2,
1932         TP_ACPI_HOTKEYSCAN_FNF3,
1933         TP_ACPI_HOTKEYSCAN_FNF4,
1934         TP_ACPI_HOTKEYSCAN_FNF5,
1935         TP_ACPI_HOTKEYSCAN_FNF6,
1936         TP_ACPI_HOTKEYSCAN_FNF7,
1937         TP_ACPI_HOTKEYSCAN_FNF8,
1938         TP_ACPI_HOTKEYSCAN_FNF9,
1939         TP_ACPI_HOTKEYSCAN_FNF10,
1940         TP_ACPI_HOTKEYSCAN_FNF11,
1941         TP_ACPI_HOTKEYSCAN_FNF12,
1942         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1943         TP_ACPI_HOTKEYSCAN_FNINSERT,
1944         TP_ACPI_HOTKEYSCAN_FNDELETE,
1945         TP_ACPI_HOTKEYSCAN_FNHOME,
1946         TP_ACPI_HOTKEYSCAN_FNEND,
1947         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1948         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1949         TP_ACPI_HOTKEYSCAN_FNSPACE,
1950         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1951         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1952         TP_ACPI_HOTKEYSCAN_MUTE,
1953         TP_ACPI_HOTKEYSCAN_THINKPAD,
1954 };
1955
1956 enum {  /* Keys/events available through NVRAM polling */
1957         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1958         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1959 };
1960
1961 enum {  /* Positions of some of the keys in hotkey masks */
1962         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1963         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1964         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1965         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1966         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1967         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1968         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1969         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1970         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1971         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1972         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1973 };
1974
1975 enum {  /* NVRAM to ACPI HKEY group map */
1976         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1977                                           TP_ACPI_HKEY_ZOOM_MASK |
1978                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1979                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1980         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1981                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1982         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1983                                           TP_ACPI_HKEY_VOLDWN_MASK |
1984                                           TP_ACPI_HKEY_MUTE_MASK,
1985 };
1986
1987 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1988 struct tp_nvram_state {
1989        u16 thinkpad_toggle:1;
1990        u16 zoom_toggle:1;
1991        u16 display_toggle:1;
1992        u16 thinklight_toggle:1;
1993        u16 hibernate_toggle:1;
1994        u16 displayexp_toggle:1;
1995        u16 display_state:1;
1996        u16 brightness_toggle:1;
1997        u16 volume_toggle:1;
1998        u16 mute:1;
1999
2000        u8 brightness_level;
2001        u8 volume_level;
2002 };
2003
2004 /* kthread for the hotkey poller */
2005 static struct task_struct *tpacpi_hotkey_task;
2006
2007 /* Acquired while the poller kthread is running, use to sync start/stop */
2008 static struct mutex hotkey_thread_mutex;
2009
2010 /*
2011  * Acquire mutex to write poller control variables as an
2012  * atomic block.
2013  *
2014  * Increment hotkey_config_change when changing them if you
2015  * want the kthread to forget old state.
2016  *
2017  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2018  */
2019 static struct mutex hotkey_thread_data_mutex;
2020 static unsigned int hotkey_config_change;
2021
2022 /*
2023  * hotkey poller control variables
2024  *
2025  * Must be atomic or readers will also need to acquire mutex
2026  *
2027  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2028  * should be used only when the changes need to be taken as
2029  * a block, OR when one needs to force the kthread to forget
2030  * old state.
2031  */
2032 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2033 static unsigned int hotkey_poll_freq = 10; /* Hz */
2034
2035 #define HOTKEY_CONFIG_CRITICAL_START \
2036         do { \
2037                 mutex_lock(&hotkey_thread_data_mutex); \
2038                 hotkey_config_change++; \
2039         } while (0);
2040 #define HOTKEY_CONFIG_CRITICAL_END \
2041         mutex_unlock(&hotkey_thread_data_mutex);
2042
2043 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2044
2045 #define hotkey_source_mask 0U
2046 #define HOTKEY_CONFIG_CRITICAL_START
2047 #define HOTKEY_CONFIG_CRITICAL_END
2048
2049 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2050
2051 static struct mutex hotkey_mutex;
2052
2053 static enum {   /* Reasons for waking up */
2054         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2055         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2056         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2057 } hotkey_wakeup_reason;
2058
2059 static int hotkey_autosleep_ack;
2060
2061 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2062 static u32 hotkey_all_mask;             /* all events supported in fw */
2063 static u32 hotkey_reserved_mask;        /* events better left disabled */
2064 static u32 hotkey_driver_mask;          /* events needed by the driver */
2065 static u32 hotkey_user_mask;            /* events visible to userspace */
2066 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2067
2068 static unsigned int hotkey_report_mode;
2069
2070 static u16 *hotkey_keycode_map;
2071
2072 static struct attribute_set *hotkey_dev_attributes;
2073
2074 static void tpacpi_driver_event(const unsigned int hkey_event);
2075 static void hotkey_driver_event(const unsigned int scancode);
2076
2077 /* HKEY.MHKG() return bits */
2078 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2079
2080 static int hotkey_get_wlsw(void)
2081 {
2082         int status;
2083
2084         if (!tp_features.hotkey_wlsw)
2085                 return -ENODEV;
2086
2087 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2088         if (dbg_wlswemul)
2089                 return (tpacpi_wlsw_emulstate) ?
2090                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2091 #endif
2092
2093         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2094                 return -EIO;
2095
2096         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2097 }
2098
2099 static int hotkey_get_tablet_mode(int *status)
2100 {
2101         int s;
2102
2103         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2104                 return -EIO;
2105
2106         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2107         return 0;
2108 }
2109
2110 /*
2111  * Reads current event mask from firmware, and updates
2112  * hotkey_acpi_mask accordingly.  Also resets any bits
2113  * from hotkey_user_mask that are unavailable to be
2114  * delivered (shadow requirement of the userspace ABI).
2115  *
2116  * Call with hotkey_mutex held
2117  */
2118 static int hotkey_mask_get(void)
2119 {
2120         if (tp_features.hotkey_mask) {
2121                 u32 m = 0;
2122
2123                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2124                         return -EIO;
2125
2126                 hotkey_acpi_mask = m;
2127         } else {
2128                 /* no mask support doesn't mean no event support... */
2129                 hotkey_acpi_mask = hotkey_all_mask;
2130         }
2131
2132         /* sync userspace-visible mask */
2133         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2134
2135         return 0;
2136 }
2137
2138 void static hotkey_mask_warn_incomplete_mask(void)
2139 {
2140         /* log only what the user can fix... */
2141         const u32 wantedmask = hotkey_driver_mask &
2142                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2143                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2144
2145         if (wantedmask)
2146                 printk(TPACPI_NOTICE
2147                         "required events 0x%08x not enabled!\n",
2148                         wantedmask);
2149 }
2150
2151 /*
2152  * Set the firmware mask when supported
2153  *
2154  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2155  *
2156  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2157  *
2158  * Call with hotkey_mutex held
2159  */
2160 static int hotkey_mask_set(u32 mask)
2161 {
2162         int i;
2163         int rc = 0;
2164
2165         const u32 fwmask = mask & ~hotkey_source_mask;
2166
2167         if (tp_features.hotkey_mask) {
2168                 for (i = 0; i < 32; i++) {
2169                         if (!acpi_evalf(hkey_handle,
2170                                         NULL, "MHKM", "vdd", i + 1,
2171                                         !!(mask & (1 << i)))) {
2172                                 rc = -EIO;
2173                                 break;
2174                         }
2175                 }
2176         }
2177
2178         /*
2179          * We *must* make an inconditional call to hotkey_mask_get to
2180          * refresh hotkey_acpi_mask and update hotkey_user_mask
2181          *
2182          * Take the opportunity to also log when we cannot _enable_
2183          * a given event.
2184          */
2185         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2186                 printk(TPACPI_NOTICE
2187                        "asked for hotkey mask 0x%08x, but "
2188                        "firmware forced it to 0x%08x\n",
2189                        fwmask, hotkey_acpi_mask);
2190         }
2191
2192         hotkey_mask_warn_incomplete_mask();
2193
2194         return rc;
2195 }
2196
2197 /*
2198  * Sets hotkey_user_mask and tries to set the firmware mask
2199  *
2200  * Call with hotkey_mutex held
2201  */
2202 static int hotkey_user_mask_set(const u32 mask)
2203 {
2204         int rc;
2205
2206         /* Give people a chance to notice they are doing something that
2207          * is bound to go boom on their users sooner or later */
2208         if (!tp_warned.hotkey_mask_ff &&
2209             (mask == 0xffff || mask == 0xffffff ||
2210              mask == 0xffffffff)) {
2211                 tp_warned.hotkey_mask_ff = 1;
2212                 printk(TPACPI_NOTICE
2213                        "setting the hotkey mask to 0x%08x is likely "
2214                        "not the best way to go about it\n", mask);
2215                 printk(TPACPI_NOTICE
2216                        "please consider using the driver defaults, "
2217                        "and refer to up-to-date thinkpad-acpi "
2218                        "documentation\n");
2219         }
2220
2221         /* Try to enable what the user asked for, plus whatever we need.
2222          * this syncs everything but won't enable bits in hotkey_user_mask */
2223         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2224
2225         /* Enable the available bits in hotkey_user_mask */
2226         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2227
2228         return rc;
2229 }
2230
2231 /*
2232  * Sets the driver hotkey mask.
2233  *
2234  * Can be called even if the hotkey subdriver is inactive
2235  */
2236 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2237 {
2238         int rc;
2239
2240         /* Do the right thing if hotkey_init has not been called yet */
2241         if (!tp_features.hotkey) {
2242                 hotkey_driver_mask = mask;
2243                 return 0;
2244         }
2245
2246         mutex_lock(&hotkey_mutex);
2247
2248         HOTKEY_CONFIG_CRITICAL_START
2249         hotkey_driver_mask = mask;
2250 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2251         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2252 #endif
2253         HOTKEY_CONFIG_CRITICAL_END
2254
2255         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2256                                                         ~hotkey_source_mask);
2257         mutex_unlock(&hotkey_mutex);
2258
2259         return rc;
2260 }
2261
2262 static int hotkey_status_get(int *status)
2263 {
2264         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2265                 return -EIO;
2266
2267         return 0;
2268 }
2269
2270 static int hotkey_status_set(bool enable)
2271 {
2272         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2273                 return -EIO;
2274
2275         return 0;
2276 }
2277
2278 static void tpacpi_input_send_tabletsw(void)
2279 {
2280         int state;
2281
2282         if (tp_features.hotkey_tablet &&
2283             !hotkey_get_tablet_mode(&state)) {
2284                 mutex_lock(&tpacpi_inputdev_send_mutex);
2285
2286                 input_report_switch(tpacpi_inputdev,
2287                                     SW_TABLET_MODE, !!state);
2288                 input_sync(tpacpi_inputdev);
2289
2290                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2291         }
2292 }
2293
2294 /* Do NOT call without validating scancode first */
2295 static void tpacpi_input_send_key(const unsigned int scancode)
2296 {
2297         const unsigned int keycode = hotkey_keycode_map[scancode];
2298
2299         if (keycode != KEY_RESERVED) {
2300                 mutex_lock(&tpacpi_inputdev_send_mutex);
2301
2302                 input_report_key(tpacpi_inputdev, keycode, 1);
2303                 if (keycode == KEY_UNKNOWN)
2304                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2305                                     scancode);
2306                 input_sync(tpacpi_inputdev);
2307
2308                 input_report_key(tpacpi_inputdev, keycode, 0);
2309                 if (keycode == KEY_UNKNOWN)
2310                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2311                                     scancode);
2312                 input_sync(tpacpi_inputdev);
2313
2314                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2315         }
2316 }
2317
2318 /* Do NOT call without validating scancode first */
2319 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2320 {
2321         hotkey_driver_event(scancode);
2322         if (hotkey_user_mask & (1 << scancode))
2323                 tpacpi_input_send_key(scancode);
2324 }
2325
2326 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2327 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2328
2329 /* Do NOT call without validating scancode first */
2330 static void tpacpi_hotkey_send_key(unsigned int scancode)
2331 {
2332         tpacpi_input_send_key_masked(scancode);
2333         if (hotkey_report_mode < 2) {
2334                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2335                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2336         }
2337 }
2338
2339 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2340 {
2341         u8 d;
2342
2343         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2344                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2345                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2346                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2347                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2348                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2349         }
2350         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2351                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2352                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2353         }
2354         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2355                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2356                 n->displayexp_toggle =
2357                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2358         }
2359         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2360                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2361                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2362                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2363                 n->brightness_toggle =
2364                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2365         }
2366         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2367                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2368                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2369                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2370                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2371                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2372         }
2373 }
2374
2375 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2376                                            struct tp_nvram_state *newn,
2377                                            const u32 event_mask)
2378 {
2379
2380 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2381         do { \
2382                 if ((event_mask & (1 << __scancode)) && \
2383                     oldn->__member != newn->__member) \
2384                         tpacpi_hotkey_send_key(__scancode); \
2385         } while (0)
2386
2387 #define TPACPI_MAY_SEND_KEY(__scancode) \
2388         do { \
2389                 if (event_mask & (1 << __scancode)) \
2390                         tpacpi_hotkey_send_key(__scancode); \
2391         } while (0)
2392
2393         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2394         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2395         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2396         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2397
2398         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2399
2400         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2401
2402         /* handle volume */
2403         if (oldn->volume_toggle != newn->volume_toggle) {
2404                 if (oldn->mute != newn->mute) {
2405                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2406                 }
2407                 if (oldn->volume_level > newn->volume_level) {
2408                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2409                 } else if (oldn->volume_level < newn->volume_level) {
2410                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2411                 } else if (oldn->mute == newn->mute) {
2412                         /* repeated key presses that didn't change state */
2413                         if (newn->mute) {
2414                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2415                         } else if (newn->volume_level != 0) {
2416                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2417                         } else {
2418                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2419                         }
2420                 }
2421         }
2422
2423         /* handle brightness */
2424         if (oldn->brightness_toggle != newn->brightness_toggle) {
2425                 if (oldn->brightness_level < newn->brightness_level) {
2426                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2427                 } else if (oldn->brightness_level > newn->brightness_level) {
2428                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2429                 } else {
2430                         /* repeated key presses that didn't change state */
2431                         if (newn->brightness_level != 0) {
2432                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2433                         } else {
2434                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2435                         }
2436                 }
2437         }
2438
2439 #undef TPACPI_COMPARE_KEY
2440 #undef TPACPI_MAY_SEND_KEY
2441 }
2442
2443 /*
2444  * Polling driver
2445  *
2446  * We track all events in hotkey_source_mask all the time, since
2447  * most of them are edge-based.  We only issue those requested by
2448  * hotkey_user_mask or hotkey_driver_mask, though.
2449  */
2450 static int hotkey_kthread(void *data)
2451 {
2452         struct tp_nvram_state s[2];
2453         u32 poll_mask, event_mask;
2454         unsigned int si, so;
2455         unsigned long t;
2456         unsigned int change_detector, must_reset;
2457         unsigned int poll_freq;
2458
2459         mutex_lock(&hotkey_thread_mutex);
2460
2461         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2462                 goto exit;
2463
2464         set_freezable();
2465
2466         so = 0;
2467         si = 1;
2468         t = 0;
2469
2470         /* Initial state for compares */
2471         mutex_lock(&hotkey_thread_data_mutex);
2472         change_detector = hotkey_config_change;
2473         poll_mask = hotkey_source_mask;
2474         event_mask = hotkey_source_mask &
2475                         (hotkey_driver_mask | hotkey_user_mask);
2476         poll_freq = hotkey_poll_freq;
2477         mutex_unlock(&hotkey_thread_data_mutex);
2478         hotkey_read_nvram(&s[so], poll_mask);
2479
2480         while (!kthread_should_stop()) {
2481                 if (t == 0) {
2482                         if (likely(poll_freq))
2483                                 t = 1000/poll_freq;
2484                         else
2485                                 t = 100;        /* should never happen... */
2486                 }
2487                 t = msleep_interruptible(t);
2488                 if (unlikely(kthread_should_stop()))
2489                         break;
2490                 must_reset = try_to_freeze();
2491                 if (t > 0 && !must_reset)
2492                         continue;
2493
2494                 mutex_lock(&hotkey_thread_data_mutex);
2495                 if (must_reset || hotkey_config_change != change_detector) {
2496                         /* forget old state on thaw or config change */
2497                         si = so;
2498                         t = 0;
2499                         change_detector = hotkey_config_change;
2500                 }
2501                 poll_mask = hotkey_source_mask;
2502                 event_mask = hotkey_source_mask &
2503                                 (hotkey_driver_mask | hotkey_user_mask);
2504                 poll_freq = hotkey_poll_freq;
2505                 mutex_unlock(&hotkey_thread_data_mutex);
2506
2507                 if (likely(poll_mask)) {
2508                         hotkey_read_nvram(&s[si], poll_mask);
2509                         if (likely(si != so)) {
2510                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2511                                                                 event_mask);
2512                         }
2513                 }
2514
2515                 so = si;
2516                 si ^= 1;
2517         }
2518
2519 exit:
2520         mutex_unlock(&hotkey_thread_mutex);
2521         return 0;
2522 }
2523
2524 /* call with hotkey_mutex held */
2525 static void hotkey_poll_stop_sync(void)
2526 {
2527         if (tpacpi_hotkey_task) {
2528                 if (frozen(tpacpi_hotkey_task) ||
2529                     freezing(tpacpi_hotkey_task))
2530                         thaw_process(tpacpi_hotkey_task);
2531
2532                 kthread_stop(tpacpi_hotkey_task);
2533                 tpacpi_hotkey_task = NULL;
2534                 mutex_lock(&hotkey_thread_mutex);
2535                 /* at this point, the thread did exit */
2536                 mutex_unlock(&hotkey_thread_mutex);
2537         }
2538 }
2539
2540 /* call with hotkey_mutex held */
2541 static void hotkey_poll_setup(bool may_warn)
2542 {
2543         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2544         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2545
2546         if (hotkey_poll_freq > 0 &&
2547             (poll_driver_mask ||
2548              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2549                 if (!tpacpi_hotkey_task) {
2550                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2551                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2552                         if (IS_ERR(tpacpi_hotkey_task)) {
2553                                 tpacpi_hotkey_task = NULL;
2554                                 printk(TPACPI_ERR
2555                                        "could not create kernel thread "
2556                                        "for hotkey polling\n");
2557                         }
2558                 }
2559         } else {
2560                 hotkey_poll_stop_sync();
2561                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2562                     hotkey_poll_freq == 0) {
2563                         printk(TPACPI_NOTICE
2564                                 "hot keys 0x%08x and/or events 0x%08x "
2565                                 "require polling, which is currently "
2566                                 "disabled\n",
2567                                 poll_user_mask, poll_driver_mask);
2568                 }
2569         }
2570 }
2571
2572 static void hotkey_poll_setup_safe(bool may_warn)
2573 {
2574         mutex_lock(&hotkey_mutex);
2575         hotkey_poll_setup(may_warn);
2576         mutex_unlock(&hotkey_mutex);
2577 }
2578
2579 /* call with hotkey_mutex held */
2580 static void hotkey_poll_set_freq(unsigned int freq)
2581 {
2582         if (!freq)
2583                 hotkey_poll_stop_sync();
2584
2585         hotkey_poll_freq = freq;
2586 }
2587
2588 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2589
2590 static void hotkey_poll_setup_safe(bool __unused)
2591 {
2592 }
2593
2594 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2595
2596 static int hotkey_inputdev_open(struct input_dev *dev)
2597 {
2598         switch (tpacpi_lifecycle) {
2599         case TPACPI_LIFE_INIT:
2600                 /*
2601                  * hotkey_init will call hotkey_poll_setup_safe
2602                  * at the appropriate moment
2603                  */
2604                 return 0;
2605         case TPACPI_LIFE_EXITING:
2606                 return -EBUSY;
2607         case TPACPI_LIFE_RUNNING:
2608                 hotkey_poll_setup_safe(false);
2609                 return 0;
2610         }
2611
2612         /* Should only happen if tpacpi_lifecycle is corrupt */
2613         BUG();
2614         return -EBUSY;
2615 }
2616
2617 static void hotkey_inputdev_close(struct input_dev *dev)
2618 {
2619         /* disable hotkey polling when possible */
2620         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2621             !(hotkey_source_mask & hotkey_driver_mask))
2622                 hotkey_poll_setup_safe(false);
2623 }
2624
2625 /* sysfs hotkey enable ------------------------------------------------- */
2626 static ssize_t hotkey_enable_show(struct device *dev,
2627                            struct device_attribute *attr,
2628                            char *buf)
2629 {
2630         int res, status;
2631
2632         printk_deprecated_attribute("hotkey_enable",
2633                         "Hotkey reporting is always enabled");
2634
2635         res = hotkey_status_get(&status);
2636         if (res)
2637                 return res;
2638
2639         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2640 }
2641
2642 static ssize_t hotkey_enable_store(struct device *dev,
2643                             struct device_attribute *attr,
2644                             const char *buf, size_t count)
2645 {
2646         unsigned long t;
2647
2648         printk_deprecated_attribute("hotkey_enable",
2649                         "Hotkeys can be disabled through hotkey_mask");
2650
2651         if (parse_strtoul(buf, 1, &t))
2652                 return -EINVAL;
2653
2654         if (t == 0)
2655                 return -EPERM;
2656
2657         return count;
2658 }
2659
2660 static struct device_attribute dev_attr_hotkey_enable =
2661         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2662                 hotkey_enable_show, hotkey_enable_store);
2663
2664 /* sysfs hotkey mask --------------------------------------------------- */
2665 static ssize_t hotkey_mask_show(struct device *dev,
2666                            struct device_attribute *attr,
2667                            char *buf)
2668 {
2669         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2670 }
2671
2672 static ssize_t hotkey_mask_store(struct device *dev,
2673                             struct device_attribute *attr,
2674                             const char *buf, size_t count)
2675 {
2676         unsigned long t;
2677         int res;
2678
2679         if (parse_strtoul(buf, 0xffffffffUL, &t))
2680                 return -EINVAL;
2681
2682         if (mutex_lock_killable(&hotkey_mutex))
2683                 return -ERESTARTSYS;
2684
2685         res = hotkey_user_mask_set(t);
2686
2687 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2688         hotkey_poll_setup(true);
2689 #endif
2690
2691         mutex_unlock(&hotkey_mutex);
2692
2693         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2694
2695         return (res) ? res : count;
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_mask =
2699         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2700                 hotkey_mask_show, hotkey_mask_store);
2701
2702 /* sysfs hotkey bios_enabled ------------------------------------------- */
2703 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2704                            struct device_attribute *attr,
2705                            char *buf)
2706 {
2707         return sprintf(buf, "0\n");
2708 }
2709
2710 static struct device_attribute dev_attr_hotkey_bios_enabled =
2711         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2712
2713 /* sysfs hotkey bios_mask ---------------------------------------------- */
2714 static ssize_t hotkey_bios_mask_show(struct device *dev,
2715                            struct device_attribute *attr,
2716                            char *buf)
2717 {
2718         printk_deprecated_attribute("hotkey_bios_mask",
2719                         "This attribute is useless.");
2720         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_bios_mask =
2724         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2725
2726 /* sysfs hotkey all_mask ----------------------------------------------- */
2727 static ssize_t hotkey_all_mask_show(struct device *dev,
2728                            struct device_attribute *attr,
2729                            char *buf)
2730 {
2731         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2732                                 hotkey_all_mask | hotkey_source_mask);
2733 }
2734
2735 static struct device_attribute dev_attr_hotkey_all_mask =
2736         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2737
2738 /* sysfs hotkey recommended_mask --------------------------------------- */
2739 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2740                                             struct device_attribute *attr,
2741                                             char *buf)
2742 {
2743         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2744                         (hotkey_all_mask | hotkey_source_mask)
2745                         & ~hotkey_reserved_mask);
2746 }
2747
2748 static struct device_attribute dev_attr_hotkey_recommended_mask =
2749         __ATTR(hotkey_recommended_mask, S_IRUGO,
2750                 hotkey_recommended_mask_show, NULL);
2751
2752 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2753
2754 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2755 static ssize_t hotkey_source_mask_show(struct device *dev,
2756                            struct device_attribute *attr,
2757                            char *buf)
2758 {
2759         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2760 }
2761
2762 static ssize_t hotkey_source_mask_store(struct device *dev,
2763                             struct device_attribute *attr,
2764                             const char *buf, size_t count)
2765 {
2766         unsigned long t;
2767         u32 r_ev;
2768         int rc;
2769
2770         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2771                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2772                 return -EINVAL;
2773
2774         if (mutex_lock_killable(&hotkey_mutex))
2775                 return -ERESTARTSYS;
2776
2777         HOTKEY_CONFIG_CRITICAL_START
2778         hotkey_source_mask = t;
2779         HOTKEY_CONFIG_CRITICAL_END
2780
2781         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2782                         ~hotkey_source_mask);
2783         hotkey_poll_setup(true);
2784
2785         /* check if events needed by the driver got disabled */
2786         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2787                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2788
2789         mutex_unlock(&hotkey_mutex);
2790
2791         if (rc < 0)
2792                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2793                         "firmware event mask!\n");
2794
2795         if (r_ev)
2796                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2797                         "some important events were disabled: "
2798                         "0x%04x\n", r_ev);
2799
2800         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2801
2802         return (rc < 0) ? rc : count;
2803 }
2804
2805 static struct device_attribute dev_attr_hotkey_source_mask =
2806         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2807                 hotkey_source_mask_show, hotkey_source_mask_store);
2808
2809 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2810 static ssize_t hotkey_poll_freq_show(struct device *dev,
2811                            struct device_attribute *attr,
2812                            char *buf)
2813 {
2814         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2815 }
2816
2817 static ssize_t hotkey_poll_freq_store(struct device *dev,
2818                             struct device_attribute *attr,
2819                             const char *buf, size_t count)
2820 {
2821         unsigned long t;
2822
2823         if (parse_strtoul(buf, 25, &t))
2824                 return -EINVAL;
2825
2826         if (mutex_lock_killable(&hotkey_mutex))
2827                 return -ERESTARTSYS;
2828
2829         hotkey_poll_set_freq(t);
2830         hotkey_poll_setup(true);
2831
2832         mutex_unlock(&hotkey_mutex);
2833
2834         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2835
2836         return count;
2837 }
2838
2839 static struct device_attribute dev_attr_hotkey_poll_freq =
2840         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2841                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2842
2843 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2844
2845 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2846 static ssize_t hotkey_radio_sw_show(struct device *dev,
2847                            struct device_attribute *attr,
2848                            char *buf)
2849 {
2850         int res;
2851         res = hotkey_get_wlsw();
2852         if (res < 0)
2853                 return res;
2854
2855         /* Opportunistic update */
2856         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2857
2858         return snprintf(buf, PAGE_SIZE, "%d\n",
2859                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2860 }
2861
2862 static struct device_attribute dev_attr_hotkey_radio_sw =
2863         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2864
2865 static void hotkey_radio_sw_notify_change(void)
2866 {
2867         if (tp_features.hotkey_wlsw)
2868                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2869                              "hotkey_radio_sw");
2870 }
2871
2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2873 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2874                            struct device_attribute *attr,
2875                            char *buf)
2876 {
2877         int res, s;
2878         res = hotkey_get_tablet_mode(&s);
2879         if (res < 0)
2880                 return res;
2881
2882         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2883 }
2884
2885 static struct device_attribute dev_attr_hotkey_tablet_mode =
2886         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2887
2888 static void hotkey_tablet_mode_notify_change(void)
2889 {
2890         if (tp_features.hotkey_tablet)
2891                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2892                              "hotkey_tablet_mode");
2893 }
2894
2895 /* sysfs hotkey report_mode -------------------------------------------- */
2896 static ssize_t hotkey_report_mode_show(struct device *dev,
2897                            struct device_attribute *attr,
2898                            char *buf)
2899 {
2900         return snprintf(buf, PAGE_SIZE, "%d\n",
2901                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2902 }
2903
2904 static struct device_attribute dev_attr_hotkey_report_mode =
2905         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2906
2907 /* sysfs wakeup reason (pollable) -------------------------------------- */
2908 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2909                            struct device_attribute *attr,
2910                            char *buf)
2911 {
2912         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2913 }
2914
2915 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2916         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2917
2918 static void hotkey_wakeup_reason_notify_change(void)
2919 {
2920         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2921                      "wakeup_reason");
2922 }
2923
2924 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2925 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2926                            struct device_attribute *attr,
2927                            char *buf)
2928 {
2929         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2930 }
2931
2932 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2933         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2934                hotkey_wakeup_hotunplug_complete_show, NULL);
2935
2936 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2937 {
2938         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2939                      "wakeup_hotunplug_complete");
2940 }
2941
2942 /* --------------------------------------------------------------------- */
2943
2944 static struct attribute *hotkey_attributes[] __initdata = {
2945         &dev_attr_hotkey_enable.attr,
2946         &dev_attr_hotkey_bios_enabled.attr,
2947         &dev_attr_hotkey_bios_mask.attr,
2948         &dev_attr_hotkey_report_mode.attr,
2949         &dev_attr_hotkey_wakeup_reason.attr,
2950         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2951         &dev_attr_hotkey_mask.attr,
2952         &dev_attr_hotkey_all_mask.attr,
2953         &dev_attr_hotkey_recommended_mask.attr,
2954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2955         &dev_attr_hotkey_source_mask.attr,
2956         &dev_attr_hotkey_poll_freq.attr,
2957 #endif
2958 };
2959
2960 /*
2961  * Sync both the hw and sw blocking state of all switches
2962  */
2963 static void tpacpi_send_radiosw_update(void)
2964 {
2965         int wlsw;
2966
2967         /*
2968          * We must sync all rfkill controllers *before* issuing any
2969          * rfkill input events, or we will race the rfkill core input
2970          * handler.
2971          *
2972          * tpacpi_inputdev_send_mutex works as a syncronization point
2973          * for the above.
2974          *
2975          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2976          */
2977
2978         wlsw = hotkey_get_wlsw();
2979
2980         /* Sync hw blocking state first if it is hw-blocked */
2981         if (wlsw == TPACPI_RFK_RADIO_OFF)
2982                 tpacpi_rfk_update_hwblock_state(true);
2983
2984         /* Sync sw blocking state */
2985         tpacpi_rfk_update_swstate_all();
2986
2987         /* Sync hw blocking state last if it is hw-unblocked */
2988         if (wlsw == TPACPI_RFK_RADIO_ON)
2989                 tpacpi_rfk_update_hwblock_state(false);
2990
2991         /* Issue rfkill input event for WLSW switch */
2992         if (!(wlsw < 0)) {
2993                 mutex_lock(&tpacpi_inputdev_send_mutex);
2994
2995                 input_report_switch(tpacpi_inputdev,
2996                                     SW_RFKILL_ALL, (wlsw > 0));
2997                 input_sync(tpacpi_inputdev);
2998
2999                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3000         }
3001
3002         /*
3003          * this can be unconditional, as we will poll state again
3004          * if userspace uses the notify to read data
3005          */
3006         hotkey_radio_sw_notify_change();
3007 }
3008
3009 static void hotkey_exit(void)
3010 {
3011 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3012         mutex_lock(&hotkey_mutex);
3013         hotkey_poll_stop_sync();
3014         mutex_unlock(&hotkey_mutex);
3015 #endif
3016
3017         if (hotkey_dev_attributes)
3018                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3019
3020         kfree(hotkey_keycode_map);
3021
3022         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3023                    "restoring original HKEY status and mask\n");
3024         /* yes, there is a bitwise or below, we want the
3025          * functions to be called even if one of them fail */
3026         if (((tp_features.hotkey_mask &&
3027               hotkey_mask_set(hotkey_orig_mask)) |
3028              hotkey_status_set(false)) != 0)
3029                 printk(TPACPI_ERR
3030                        "failed to restore hot key mask "
3031                        "to BIOS defaults\n");
3032 }
3033
3034 static void __init hotkey_unmap(const unsigned int scancode)
3035 {
3036         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3037                 clear_bit(hotkey_keycode_map[scancode],
3038                           tpacpi_inputdev->keybit);
3039                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3040         }
3041 }
3042
3043 /*
3044  * HKEY quirks:
3045  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3046  */
3047
3048 #define TPACPI_HK_Q_INIMASK     0x0001
3049
3050 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3051         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3052         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3053         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3054         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3055         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3056         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3057         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3058         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3059         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3060         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3061         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3062         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3063         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3064         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3065         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3066         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3067         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3068         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3069         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3070 };
3071
3072 static int __init hotkey_init(struct ibm_init_struct *iibm)
3073 {
3074         /* Requirements for changing the default keymaps:
3075          *
3076          * 1. Many of the keys are mapped to KEY_RESERVED for very
3077          *    good reasons.  Do not change them unless you have deep
3078          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3079          *    the various ThinkPad models.  The driver behaves
3080          *    differently for KEY_RESERVED: such keys have their
3081          *    hot key mask *unset* in mask_recommended, and also
3082          *    in the initial hot key mask programmed into the
3083          *    firmware at driver load time, which means the firm-
3084          *    ware may react very differently if you change them to
3085          *    something else;
3086          *
3087          * 2. You must be subscribed to the linux-thinkpad and
3088          *    ibm-acpi-devel mailing lists, and you should read the
3089          *    list archives since 2007 if you want to change the
3090          *    keymaps.  This requirement exists so that you will
3091          *    know the past history of problems with the thinkpad-
3092          *    acpi driver keymaps, and also that you will be
3093          *    listening to any bug reports;
3094          *
3095          * 3. Do not send thinkpad-acpi specific patches directly to
3096          *    for merging, *ever*.  Send them to the linux-acpi
3097          *    mailinglist for comments.  Merging is to be done only
3098          *    through acpi-test and the ACPI maintainer.
3099          *
3100          * If the above is too much to ask, don't change the keymap.
3101          * Ask the thinkpad-acpi maintainer to do it, instead.
3102          */
3103         static u16 ibm_keycode_map[] __initdata = {
3104                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3105                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3106                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3107                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3108
3109                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3110                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3111                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3112                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3113
3114                 /* brightness: firmware always reacts to them */
3115                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3116                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3117
3118                 /* Thinklight: firmware always react to it */
3119                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3120
3121                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3122                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3123
3124                 /* Volume: firmware always react to it and reprograms
3125                  * the built-in *extra* mixer.  Never map it to control
3126                  * another mixer by default. */
3127                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3128                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3129                 KEY_RESERVED,   /* 0x16: MUTE */
3130
3131                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3132
3133                 /* (assignments unknown, please report if found) */
3134                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3135                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3136         };
3137         static u16 lenovo_keycode_map[] __initdata = {
3138                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3139                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3140                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3141                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3142
3143                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3144                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3145                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3146                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3147
3148                 /* These should be enabled --only-- when ACPI video
3149                  * is disabled (i.e. in "vendor" mode), and are handled
3150                  * in a special way by the init code */
3151                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3152                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3153
3154                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3155
3156                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3157                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3158
3159                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3160                  * react to it and reprograms the built-in *extra* mixer.
3161                  * Never map it to control another mixer by default.
3162                  *
3163                  * T60?, T61, R60?, R61: firmware and EC tries to send
3164                  * these over the regular keyboard, so these are no-ops,
3165                  * but there are still weird bugs re. MUTE, so do not
3166                  * change unless you get test reports from all Lenovo
3167                  * models.  May cause the BIOS to interfere with the
3168                  * HDA mixer.
3169                  */
3170                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3171                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3172                 KEY_RESERVED,   /* 0x16: MUTE */
3173
3174                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3175
3176                 /* (assignments unknown, please report if found) */
3177                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3178                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3179         };
3180
3181 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3182 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3183 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3184
3185         int res, i;
3186         int status;
3187         int hkeyv;
3188
3189         unsigned long quirks;
3190
3191         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3192                         "initializing hotkey subdriver\n");
3193
3194         BUG_ON(!tpacpi_inputdev);
3195         BUG_ON(tpacpi_inputdev->open != NULL ||
3196                tpacpi_inputdev->close != NULL);
3197
3198         TPACPI_ACPIHANDLE_INIT(hkey);
3199         mutex_init(&hotkey_mutex);
3200
3201 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3202         mutex_init(&hotkey_thread_mutex);
3203         mutex_init(&hotkey_thread_data_mutex);
3204 #endif
3205
3206         /* hotkey not supported on 570 */
3207         tp_features.hotkey = hkey_handle != NULL;
3208
3209         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3210                 "hotkeys are %s\n",
3211                 str_supported(tp_features.hotkey));
3212
3213         if (!tp_features.hotkey)
3214                 return 1;
3215
3216         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3217                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3218
3219         tpacpi_disable_brightness_delay();
3220
3221         /* MUST have enough space for all attributes to be added to
3222          * hotkey_dev_attributes */
3223         hotkey_dev_attributes = create_attr_set(
3224                                         ARRAY_SIZE(hotkey_attributes) + 2,
3225                                         NULL);
3226         if (!hotkey_dev_attributes)
3227                 return -ENOMEM;
3228         res = add_many_to_attr_set(hotkey_dev_attributes,
3229                         hotkey_attributes,
3230                         ARRAY_SIZE(hotkey_attributes));
3231         if (res)
3232                 goto err_exit;
3233
3234         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3235            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3236            for HKEY interface version 0x100 */
3237         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3238                 if ((hkeyv >> 8) != 1) {
3239                         printk(TPACPI_ERR "unknown version of the "
3240                                "HKEY interface: 0x%x\n", hkeyv);
3241                         printk(TPACPI_ERR "please report this to %s\n",
3242                                TPACPI_MAIL);
3243                 } else {
3244                         /*
3245                          * MHKV 0x100 in A31, R40, R40e,
3246                          * T4x, X31, and later
3247                          */
3248                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3249                                 "firmware HKEY interface version: 0x%x\n",
3250                                 hkeyv);
3251
3252                         /* Paranoia check AND init hotkey_all_mask */
3253                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3254                                         "MHKA", "qd")) {
3255                                 printk(TPACPI_ERR
3256                                        "missing MHKA handler, "
3257                                        "please report this to %s\n",
3258                                        TPACPI_MAIL);
3259                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3260                                 hotkey_all_mask = 0x080cU;
3261                         } else {
3262                                 tp_features.hotkey_mask = 1;
3263                         }
3264                 }
3265         }
3266
3267         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3268                 "hotkey masks are %s\n",
3269                 str_supported(tp_features.hotkey_mask));
3270
3271         /* Init hotkey_all_mask if not initialized yet */
3272         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3273             (quirks & TPACPI_HK_Q_INIMASK))
3274                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3275
3276         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3277         if (tp_features.hotkey_mask) {
3278                 /* hotkey_source_mask *must* be zero for
3279                  * the first hotkey_mask_get to return hotkey_orig_mask */
3280                 res = hotkey_mask_get();
3281                 if (res)
3282                         goto err_exit;
3283
3284                 hotkey_orig_mask = hotkey_acpi_mask;
3285         } else {
3286                 hotkey_orig_mask = hotkey_all_mask;
3287                 hotkey_acpi_mask = hotkey_all_mask;
3288         }
3289
3290 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3291         if (dbg_wlswemul) {
3292                 tp_features.hotkey_wlsw = 1;
3293                 printk(TPACPI_INFO
3294                         "radio switch emulation enabled\n");
3295         } else
3296 #endif
3297         /* Not all thinkpads have a hardware radio switch */
3298         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3299                 tp_features.hotkey_wlsw = 1;
3300                 printk(TPACPI_INFO
3301                         "radio switch found; radios are %s\n",
3302                         enabled(status, 0));
3303         }
3304         if (tp_features.hotkey_wlsw)
3305                 res = add_to_attr_set(hotkey_dev_attributes,
3306                                 &dev_attr_hotkey_radio_sw.attr);
3307
3308         /* For X41t, X60t, X61t Tablets... */
3309         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3310                 tp_features.hotkey_tablet = 1;
3311                 printk(TPACPI_INFO
3312                         "possible tablet mode switch found; "
3313                         "ThinkPad in %s mode\n",
3314                         (status & TP_HOTKEY_TABLET_MASK)?
3315                                 "tablet" : "laptop");
3316                 res = add_to_attr_set(hotkey_dev_attributes,
3317                                 &dev_attr_hotkey_tablet_mode.attr);
3318         }
3319
3320         if (!res)
3321                 res = register_attr_set_with_sysfs(
3322                                 hotkey_dev_attributes,
3323                                 &tpacpi_pdev->dev.kobj);
3324         if (res)
3325                 goto err_exit;
3326
3327         /* Set up key map */
3328
3329         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3330                                         GFP_KERNEL);
3331         if (!hotkey_keycode_map) {
3332                 printk(TPACPI_ERR
3333                         "failed to allocate memory for key map\n");
3334                 res = -ENOMEM;
3335                 goto err_exit;
3336         }
3337
3338         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3339                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3340                            "using Lenovo default hot key map\n");
3341                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3342                         TPACPI_HOTKEY_MAP_SIZE);
3343         } else {
3344                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3345                            "using IBM default hot key map\n");
3346                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3347                         TPACPI_HOTKEY_MAP_SIZE);
3348         }
3349
3350         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3351         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3352         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3353         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3354         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3355         tpacpi_inputdev->keycode = hotkey_keycode_map;
3356         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3357                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3358                         set_bit(hotkey_keycode_map[i],
3359                                 tpacpi_inputdev->keybit);
3360                 } else {
3361                         if (i < sizeof(hotkey_reserved_mask)*8)
3362                                 hotkey_reserved_mask |= 1 << i;
3363                 }
3364         }
3365
3366         if (tp_features.hotkey_wlsw) {
3367                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3368                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3369         }
3370         if (tp_features.hotkey_tablet) {
3371                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3372                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3373         }
3374
3375         /* Do not issue duplicate brightness change events to
3376          * userspace */
3377         if (!tp_features.bright_acpimode)
3378                 /* update bright_acpimode... */
3379                 tpacpi_check_std_acpi_brightness_support();
3380
3381         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3382                 printk(TPACPI_INFO
3383                        "This ThinkPad has standard ACPI backlight "
3384                        "brightness control, supported by the ACPI "
3385                        "video driver\n");
3386                 printk(TPACPI_NOTICE
3387                        "Disabling thinkpad-acpi brightness events "
3388                        "by default...\n");
3389
3390                 /* Disable brightness up/down on Lenovo thinkpads when
3391                  * ACPI is handling them, otherwise it is plain impossible
3392                  * for userspace to do something even remotely sane */
3393                 hotkey_reserved_mask |=
3394                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3395                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3396                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3397                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3398         }
3399
3400 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3401         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3402                                 & ~hotkey_all_mask
3403                                 & ~hotkey_reserved_mask;
3404
3405         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3406                     "hotkey source mask 0x%08x, polling freq %u\n",
3407                     hotkey_source_mask, hotkey_poll_freq);
3408 #endif
3409
3410         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3411                         "enabling firmware HKEY event interface...\n");
3412         res = hotkey_status_set(true);
3413         if (res) {
3414                 hotkey_exit();
3415                 return res;
3416         }
3417         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3418                                | hotkey_driver_mask)
3419                               & ~hotkey_source_mask);
3420         if (res < 0 && res != -ENXIO) {
3421                 hotkey_exit();
3422                 return res;
3423         }
3424         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3425                                 & ~hotkey_reserved_mask;
3426         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3427                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3428                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3429
3430         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3431                         "legacy ibm/hotkey event reporting over procfs %s\n",
3432                         (hotkey_report_mode < 2) ?
3433                                 "enabled" : "disabled");
3434
3435         tpacpi_inputdev->open = &hotkey_inputdev_open;
3436         tpacpi_inputdev->close = &hotkey_inputdev_close;
3437
3438         hotkey_poll_setup_safe(true);
3439         tpacpi_send_radiosw_update();
3440         tpacpi_input_send_tabletsw();
3441
3442         return 0;
3443
3444 err_exit:
3445         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3446         hotkey_dev_attributes = NULL;
3447
3448         return (res < 0)? res : 1;
3449 }
3450
3451 static bool hotkey_notify_hotkey(const u32 hkey,
3452                                  bool *send_acpi_ev,
3453                                  bool *ignore_acpi_ev)
3454 {
3455         /* 0x1000-0x1FFF: key presses */
3456         unsigned int scancode = hkey & 0xfff;
3457         *send_acpi_ev = true;
3458         *ignore_acpi_ev = false;
3459
3460         if (scancode > 0 && scancode < 0x21) {
3461                 scancode--;
3462                 if (!(hotkey_source_mask & (1 << scancode))) {
3463                         tpacpi_input_send_key_masked(scancode);
3464                         *send_acpi_ev = false;
3465                 } else {
3466                         *ignore_acpi_ev = true;
3467                 }
3468                 return true;
3469         }
3470         return false;
3471 }
3472
3473 static bool hotkey_notify_wakeup(const u32 hkey,
3474                                  bool *send_acpi_ev,
3475                                  bool *ignore_acpi_ev)
3476 {
3477         /* 0x2000-0x2FFF: Wakeup reason */
3478         *send_acpi_ev = true;
3479         *ignore_acpi_ev = false;
3480
3481         switch (hkey) {
3482         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3483         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3484                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3485                 *ignore_acpi_ev = true;
3486                 break;
3487
3488         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3489         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3490                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3491                 *ignore_acpi_ev = true;
3492                 break;
3493
3494         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3495         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3496                 printk(TPACPI_ALERT
3497                         "EMERGENCY WAKEUP: battery almost empty\n");
3498                 /* how to auto-heal: */
3499                 /* 2313: woke up from S3, go to S4/S5 */
3500                 /* 2413: woke up from S4, go to S5 */
3501                 break;
3502
3503         default:
3504                 return false;
3505         }
3506
3507         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3508                 printk(TPACPI_INFO
3509                        "woke up due to a hot-unplug "
3510                        "request...\n");
3511                 hotkey_wakeup_reason_notify_change();
3512         }
3513         return true;
3514 }
3515
3516 static bool hotkey_notify_usrevent(const u32 hkey,
3517                                  bool *send_acpi_ev,
3518                                  bool *ignore_acpi_ev)
3519 {
3520         /* 0x5000-0x5FFF: human interface helpers */
3521         *send_acpi_ev = true;
3522         *ignore_acpi_ev = false;
3523
3524         switch (hkey) {
3525         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3526         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3527                 return true;
3528
3529         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3530         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3531                 tpacpi_input_send_tabletsw();
3532                 hotkey_tablet_mode_notify_change();
3533                 *send_acpi_ev = false;
3534                 return true;
3535
3536         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3537         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3538         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3539                 /* do not propagate these events */
3540                 *ignore_acpi_ev = true;
3541                 return true;
3542
3543         default:
3544                 return false;
3545         }
3546 }
3547
3548 static bool hotkey_notify_thermal(const u32 hkey,
3549                                  bool *send_acpi_ev,
3550                                  bool *ignore_acpi_ev)
3551 {
3552         /* 0x6000-0x6FFF: thermal alarms */
3553         *send_acpi_ev = true;
3554         *ignore_acpi_ev = false;
3555
3556         switch (hkey) {
3557         case TP_HKEY_EV_ALARM_BAT_HOT:
3558                 printk(TPACPI_CRIT
3559                         "THERMAL ALARM: battery is too hot!\n");
3560                 /* recommended action: warn user through gui */
3561                 return true;
3562         case TP_HKEY_EV_ALARM_BAT_XHOT:
3563                 printk(TPACPI_ALERT
3564                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3565                 /* recommended action: immediate sleep/hibernate */
3566                 return true;
3567         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3568                 printk(TPACPI_CRIT
3569                         "THERMAL ALARM: "
3570                         "a sensor reports something is too hot!\n");
3571                 /* recommended action: warn user through gui, that */
3572                 /* some internal component is too hot */
3573                 return true;
3574         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3575                 printk(TPACPI_ALERT
3576                         "THERMAL EMERGENCY: "
3577                         "a sensor reports something is extremely hot!\n");
3578                 /* recommended action: immediate sleep/hibernate */
3579                 return true;
3580         case TP_HKEY_EV_THM_TABLE_CHANGED:
3581                 printk(TPACPI_INFO
3582                         "EC reports that Thermal Table has changed\n");
3583                 /* recommended action: do nothing, we don't have
3584                  * Lenovo ATM information */
3585                 return true;
3586         default:
3587                 printk(TPACPI_ALERT
3588                          "THERMAL ALERT: unknown thermal alarm received\n");
3589                 return false;
3590         }
3591 }
3592
3593 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3594 {
3595         u32 hkey;
3596         bool send_acpi_ev;
3597         bool ignore_acpi_ev;
3598         bool known_ev;
3599
3600         if (event != 0x80) {
3601                 printk(TPACPI_ERR
3602                        "unknown HKEY notification event %d\n", event);
3603                 /* forward it to userspace, maybe it knows how to handle it */
3604                 acpi_bus_generate_netlink_event(
3605                                         ibm->acpi->device->pnp.device_class,
3606                                         dev_name(&ibm->acpi->device->dev),
3607                                         event, 0);
3608                 return;
3609         }
3610
3611         while (1) {
3612                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3613                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3614                         return;
3615                 }
3616
3617                 if (hkey == 0) {
3618                         /* queue empty */
3619                         return;
3620                 }
3621
3622                 send_acpi_ev = true;
3623                 ignore_acpi_ev = false;
3624
3625                 switch (hkey >> 12) {
3626                 case 1:
3627                         /* 0x1000-0x1FFF: key presses */
3628                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3629                                                  &ignore_acpi_ev);
3630                         break;
3631                 case 2:
3632                         /* 0x2000-0x2FFF: Wakeup reason */
3633                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3634                                                  &ignore_acpi_ev);
3635                         break;
3636                 case 3:
3637                         /* 0x3000-0x3FFF: bay-related wakeups */
3638                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3639                                 hotkey_autosleep_ack = 1;
3640                                 printk(TPACPI_INFO
3641                                        "bay ejected\n");
3642                                 hotkey_wakeup_hotunplug_complete_notify_change();
3643                                 known_ev = true;
3644                         } else {
3645                                 known_ev = false;
3646                         }
3647                         break;
3648                 case 4:
3649                         /* 0x4000-0x4FFF: dock-related wakeups */
3650                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3651                                 hotkey_autosleep_ack = 1;
3652                                 printk(TPACPI_INFO
3653                                        "undocked\n");
3654                                 hotkey_wakeup_hotunplug_complete_notify_change();
3655                                 known_ev = true;
3656                         } else {
3657                                 known_ev = false;
3658                         }
3659                         break;
3660                 case 5:
3661                         /* 0x5000-0x5FFF: human interface helpers */
3662                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3663                                                  &ignore_acpi_ev);
3664                         break;
3665                 case 6:
3666                         /* 0x6000-0x6FFF: thermal alarms */
3667                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3668                                                  &ignore_acpi_ev);
3669                         break;
3670                 case 7:
3671                         /* 0x7000-0x7FFF: misc */
3672                         if (tp_features.hotkey_wlsw &&
3673                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3674                                 tpacpi_send_radiosw_update();
3675                                 send_acpi_ev = 0;
3676                                 known_ev = true;
3677                                 break;
3678                         }
3679                         /* fallthrough to default */
3680                 default:
3681                         known_ev = false;
3682                 }
3683                 if (!known_ev) {
3684                         printk(TPACPI_NOTICE
3685                                "unhandled HKEY event 0x%04x\n", hkey);
3686                         printk(TPACPI_NOTICE
3687                                "please report the conditions when this "
3688                                "event happened to %s\n", TPACPI_MAIL);
3689                 }
3690
3691                 /* Legacy events */
3692                 if (!ignore_acpi_ev &&
3693                     (send_acpi_ev || hotkey_report_mode < 2)) {
3694                         acpi_bus_generate_proc_event(ibm->acpi->device,
3695                                                      event, hkey);
3696                 }
3697
3698                 /* netlink events */
3699                 if (!ignore_acpi_ev && send_acpi_ev) {
3700                         acpi_bus_generate_netlink_event(
3701                                         ibm->acpi->device->pnp.device_class,
3702                                         dev_name(&ibm->acpi->device->dev),
3703                                         event, hkey);
3704                 }
3705         }
3706 }
3707
3708 static void hotkey_suspend(pm_message_t state)
3709 {
3710         /* Do these on suspend, we get the events on early resume! */
3711         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3712         hotkey_autosleep_ack = 0;
3713 }
3714
3715 static void hotkey_resume(void)
3716 {
3717         tpacpi_disable_brightness_delay();
3718
3719         if (hotkey_status_set(true) < 0 ||
3720             hotkey_mask_set(hotkey_acpi_mask) < 0)
3721                 printk(TPACPI_ERR
3722                        "error while attempting to reset the event "
3723                        "firmware interface\n");
3724
3725         tpacpi_send_radiosw_update();
3726         hotkey_tablet_mode_notify_change();
3727         hotkey_wakeup_reason_notify_change();
3728         hotkey_wakeup_hotunplug_complete_notify_change();
3729         hotkey_poll_setup_safe(false);
3730 }
3731
3732 /* procfs -------------------------------------------------------------- */
3733 static int hotkey_read(char *p)
3734 {
3735         int res, status;
3736         int len = 0;
3737
3738         if (!tp_features.hotkey) {
3739                 len += sprintf(p + len, "status:\t\tnot supported\n");
3740                 return len;
3741         }
3742
3743         if (mutex_lock_killable(&hotkey_mutex))
3744                 return -ERESTARTSYS;
3745         res = hotkey_status_get(&status);
3746         if (!res)
3747                 res = hotkey_mask_get();
3748         mutex_unlock(&hotkey_mutex);
3749         if (res)
3750                 return res;
3751
3752         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3753         if (hotkey_all_mask) {
3754                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3755                 len += sprintf(p + len,
3756                                "commands:\tenable, disable, reset, <mask>\n");
3757         } else {
3758                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3759                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3760         }
3761
3762         return len;
3763 }
3764
3765 static void hotkey_enabledisable_warn(bool enable)
3766 {
3767         tpacpi_log_usertask("procfs hotkey enable/disable");
3768         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3769                         TPACPI_WARN
3770                         "hotkey enable/disable functionality has been "
3771                         "removed from the driver.  Hotkeys are always "
3772                         "enabled\n"))
3773                 printk(TPACPI_ERR
3774                         "Please remove the hotkey=enable module "
3775                         "parameter, it is deprecated.  Hotkeys are always "
3776                         "enabled\n");
3777 }
3778
3779 static int hotkey_write(char *buf)
3780 {
3781         int res;
3782         u32 mask;
3783         char *cmd;
3784
3785         if (!tp_features.hotkey)
3786                 return -ENODEV;
3787
3788         if (mutex_lock_killable(&hotkey_mutex))
3789                 return -ERESTARTSYS;
3790
3791         mask = hotkey_user_mask;
3792
3793         res = 0;
3794         while ((cmd = next_cmd(&buf))) {
3795                 if (strlencmp(cmd, "enable") == 0) {
3796                         hotkey_enabledisable_warn(1);
3797                 } else if (strlencmp(cmd, "disable") == 0) {
3798                         hotkey_enabledisable_warn(0);
3799                         res = -EPERM;
3800                 } else if (strlencmp(cmd, "reset") == 0) {
3801                         mask = (hotkey_all_mask | hotkey_source_mask)
3802                                 & ~hotkey_reserved_mask;
3803                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3804                         /* mask set */
3805                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3806                         /* mask set */
3807                 } else {
3808                         res = -EINVAL;
3809                         goto errexit;
3810                 }
3811         }
3812
3813         if (!res) {
3814                 tpacpi_disclose_usertask("procfs hotkey",
3815                         "set mask to 0x%08x\n", mask);
3816                 res = hotkey_user_mask_set(mask);
3817         }
3818
3819 errexit:
3820         mutex_unlock(&hotkey_mutex);
3821         return res;
3822 }
3823
3824 static const struct acpi_device_id ibm_htk_device_ids[] = {
3825         {TPACPI_ACPI_HKEY_HID, 0},
3826         {"", 0},
3827 };
3828
3829 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3830         .hid = ibm_htk_device_ids,
3831         .notify = hotkey_notify,
3832         .handle = &hkey_handle,
3833         .type = ACPI_DEVICE_NOTIFY,
3834 };
3835
3836 static struct ibm_struct hotkey_driver_data = {
3837         .name = "hotkey",
3838         .read = hotkey_read,
3839         .write = hotkey_write,
3840         .exit = hotkey_exit,
3841         .resume = hotkey_resume,
3842         .suspend = hotkey_suspend,
3843         .acpi = &ibm_hotkey_acpidriver,
3844 };
3845
3846 /*************************************************************************
3847  * Bluetooth subdriver
3848  */
3849
3850 enum {
3851         /* ACPI GBDC/SBDC bits */
3852         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3853         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3854         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3855                                                    off / last state */
3856 };
3857
3858 enum {
3859         /* ACPI \BLTH commands */
3860         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3861         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3862         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3863         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3864         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3865 };
3866
3867 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3868
3869 static void bluetooth_suspend(pm_message_t state)
3870 {
3871         /* Try to make sure radio will resume powered off */
3872         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3873                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3874                 vdbg_printk(TPACPI_DBG_RFKILL,
3875                         "bluetooth power down on resume request failed\n");
3876 }
3877
3878 static int bluetooth_get_status(void)
3879 {
3880         int status;
3881
3882 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3883         if (dbg_bluetoothemul)
3884                 return (tpacpi_bluetooth_emulstate) ?
3885                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3886 #endif
3887
3888         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3889                 return -EIO;
3890
3891         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3892                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3893 }
3894
3895 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3896 {
3897         int status;
3898
3899         vdbg_printk(TPACPI_DBG_RFKILL,
3900                 "will attempt to %s bluetooth\n",
3901                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3902
3903 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3904         if (dbg_bluetoothemul) {
3905                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3906                 return 0;
3907         }
3908 #endif
3909
3910         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3911         if (state == TPACPI_RFK_RADIO_ON)
3912                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3913         else
3914                 status = 0;
3915
3916         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3917                 return -EIO;
3918
3919         return 0;
3920 }
3921
3922 /* sysfs bluetooth enable ---------------------------------------------- */
3923 static ssize_t bluetooth_enable_show(struct device *dev,
3924                            struct device_attribute *attr,
3925                            char *buf)
3926 {
3927         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3928                         attr, buf);
3929 }
3930
3931 static ssize_t bluetooth_enable_store(struct device *dev,
3932                             struct device_attribute *attr,
3933                             const char *buf, size_t count)
3934 {
3935         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3936                                 attr, buf, count);
3937 }
3938
3939 static struct device_attribute dev_attr_bluetooth_enable =
3940         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3941                 bluetooth_enable_show, bluetooth_enable_store);
3942
3943 /* --------------------------------------------------------------------- */
3944
3945 static struct attribute *bluetooth_attributes[] = {
3946         &dev_attr_bluetooth_enable.attr,
3947         NULL
3948 };
3949
3950 static const struct attribute_group bluetooth_attr_group = {
3951         .attrs = bluetooth_attributes,
3952 };
3953
3954 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3955         .get_status = bluetooth_get_status,
3956         .set_status = bluetooth_set_status,
3957 };
3958
3959 static void bluetooth_shutdown(void)
3960 {
3961         /* Order firmware to save current state to NVRAM */
3962         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3963                         TP_ACPI_BLTH_SAVE_STATE))
3964                 printk(TPACPI_NOTICE
3965                         "failed to save bluetooth state to NVRAM\n");
3966         else
3967                 vdbg_printk(TPACPI_DBG_RFKILL,
3968                         "bluestooth state saved to NVRAM\n");
3969 }
3970
3971 static void bluetooth_exit(void)
3972 {
3973         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3974                         &bluetooth_attr_group);
3975
3976         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3977
3978         bluetooth_shutdown();
3979 }
3980
3981 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3982 {
3983         int res;
3984         int status = 0;
3985
3986         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3987                         "initializing bluetooth subdriver\n");
3988
3989         TPACPI_ACPIHANDLE_INIT(hkey);
3990
3991         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3992            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3993         tp_features.bluetooth = hkey_handle &&
3994             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3995
3996         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3997                 "bluetooth is %s, status 0x%02x\n",
3998                 str_supported(tp_features.bluetooth),
3999                 status);
4000
4001 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4002         if (dbg_bluetoothemul) {
4003                 tp_features.bluetooth = 1;
4004                 printk(TPACPI_INFO
4005                         "bluetooth switch emulation enabled\n");
4006         } else
4007 #endif
4008         if (tp_features.bluetooth &&
4009             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4010                 /* no bluetooth hardware present in system */
4011                 tp_features.bluetooth = 0;
4012                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4013                            "bluetooth hardware not installed\n");
4014         }
4015
4016         if (!tp_features.bluetooth)
4017                 return 1;
4018
4019         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4020                                 &bluetooth_tprfk_ops,
4021                                 RFKILL_TYPE_BLUETOOTH,
4022                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4023                                 true);
4024         if (res)
4025                 return res;
4026
4027         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4028                                 &bluetooth_attr_group);
4029         if (res) {
4030                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4031                 return res;
4032         }
4033
4034         return 0;
4035 }
4036
4037 /* procfs -------------------------------------------------------------- */
4038 static int bluetooth_read(char *p)
4039 {
4040         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4041 }
4042
4043 static int bluetooth_write(char *buf)
4044 {
4045         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4046 }
4047
4048 static struct ibm_struct bluetooth_driver_data = {
4049         .name = "bluetooth",
4050         .read = bluetooth_read,
4051         .write = bluetooth_write,
4052         .exit = bluetooth_exit,
4053         .suspend = bluetooth_suspend,
4054         .shutdown = bluetooth_shutdown,
4055 };
4056
4057 /*************************************************************************
4058  * Wan subdriver
4059  */
4060
4061 enum {
4062         /* ACPI GWAN/SWAN bits */
4063         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4064         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4065         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4066                                                    off / last state */
4067 };
4068
4069 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4070
4071 static void wan_suspend(pm_message_t state)
4072 {
4073         /* Try to make sure radio will resume powered off */
4074         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
4075                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
4076                 vdbg_printk(TPACPI_DBG_RFKILL,
4077                         "WWAN power down on resume request failed\n");
4078 }
4079
4080 static int wan_get_status(void)
4081 {
4082         int status;
4083
4084 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4085         if (dbg_wwanemul)
4086                 return (tpacpi_wwan_emulstate) ?
4087                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4088 #endif
4089
4090         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4091                 return -EIO;
4092
4093         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4094                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4095 }
4096
4097 static int wan_set_status(enum tpacpi_rfkill_state state)
4098 {
4099         int status;
4100
4101         vdbg_printk(TPACPI_DBG_RFKILL,
4102                 "will attempt to %s wwan\n",
4103                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4104
4105 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4106         if (dbg_wwanemul) {
4107                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4108                 return 0;
4109         }
4110 #endif
4111
4112         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
4113         if (state == TPACPI_RFK_RADIO_ON)
4114                 status = TP_ACPI_WANCARD_RADIOSSW;
4115         else
4116                 status = 0;
4117
4118         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4119                 return -EIO;
4120
4121         return 0;
4122 }
4123
4124 /* sysfs wan enable ---------------------------------------------------- */
4125 static ssize_t wan_enable_show(struct device *dev,
4126                            struct device_attribute *attr,
4127                            char *buf)
4128 {
4129         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4130                         attr, buf);
4131 }
4132
4133 static ssize_t wan_enable_store(struct device *dev,
4134                             struct device_attribute *attr,
4135                             const char *buf, size_t count)
4136 {
4137         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4138                         attr, buf, count);
4139 }
4140
4141 static struct device_attribute dev_attr_wan_enable =
4142         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4143                 wan_enable_show, wan_enable_store);
4144
4145 /* --------------------------------------------------------------------- */
4146
4147 static struct attribute *wan_attributes[] = {
4148         &dev_attr_wan_enable.attr,
4149         NULL
4150 };
4151
4152 static const struct attribute_group wan_attr_group = {
4153         .attrs = wan_attributes,
4154 };
4155
4156 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4157         .get_status = wan_get_status,
4158         .set_status = wan_set_status,
4159 };
4160
4161 static void wan_shutdown(void)
4162 {
4163         /* Order firmware to save current state to NVRAM */
4164         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4165                         TP_ACPI_WGSV_SAVE_STATE))
4166                 printk(TPACPI_NOTICE
4167                         "failed to save WWAN state to NVRAM\n");
4168         else
4169                 vdbg_printk(TPACPI_DBG_RFKILL,
4170                         "WWAN state saved to NVRAM\n");
4171 }
4172
4173 static void wan_exit(void)
4174 {
4175         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4176                 &wan_attr_group);
4177
4178         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4179
4180         wan_shutdown();
4181 }
4182
4183 static int __init wan_init(struct ibm_init_struct *iibm)
4184 {
4185         int res;
4186         int status = 0;
4187
4188         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189                         "initializing wan subdriver\n");
4190
4191         TPACPI_ACPIHANDLE_INIT(hkey);
4192
4193         tp_features.wan = hkey_handle &&
4194             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4195
4196         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4197                 "wan is %s, status 0x%02x\n",
4198                 str_supported(tp_features.wan),
4199                 status);
4200
4201 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4202         if (dbg_wwanemul) {
4203                 tp_features.wan = 1;
4204                 printk(TPACPI_INFO
4205                         "wwan switch emulation enabled\n");
4206         } else
4207 #endif
4208         if (tp_features.wan &&
4209             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4210                 /* no wan hardware present in system */
4211                 tp_features.wan = 0;
4212                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4213                            "wan hardware not installed\n");
4214         }
4215
4216         if (!tp_features.wan)
4217                 return 1;
4218
4219         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4220                                 &wan_tprfk_ops,
4221                                 RFKILL_TYPE_WWAN,
4222                                 TPACPI_RFK_WWAN_SW_NAME,
4223                                 true);
4224         if (res)
4225                 return res;
4226
4227         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4228                                 &wan_attr_group);
4229
4230         if (res) {
4231                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4232                 return res;
4233         }
4234
4235         return 0;
4236 }
4237
4238 /* procfs -------------------------------------------------------------- */
4239 static int wan_read(char *p)
4240 {
4241         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4242 }
4243
4244 static int wan_write(char *buf)
4245 {
4246         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4247 }
4248
4249 static struct ibm_struct wan_driver_data = {
4250         .name = "wan",
4251         .read = wan_read,
4252         .write = wan_write,
4253         .exit = wan_exit,
4254         .suspend = wan_suspend,
4255         .shutdown = wan_shutdown,
4256 };
4257
4258 /*************************************************************************
4259  * UWB subdriver
4260  */
4261
4262 enum {
4263         /* ACPI GUWB/SUWB bits */
4264         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4265         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4266 };
4267
4268 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4269
4270 static int uwb_get_status(void)
4271 {
4272         int status;
4273
4274 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4275         if (dbg_uwbemul)
4276                 return (tpacpi_uwb_emulstate) ?
4277                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4278 #endif
4279
4280         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4281                 return -EIO;
4282
4283         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4284                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4285 }
4286
4287 static int uwb_set_status(enum tpacpi_rfkill_state state)
4288 {
4289         int status;
4290
4291         vdbg_printk(TPACPI_DBG_RFKILL,
4292                 "will attempt to %s UWB\n",
4293                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4294
4295 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4296         if (dbg_uwbemul) {
4297                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4298                 return 0;
4299         }
4300 #endif
4301
4302         if (state == TPACPI_RFK_RADIO_ON)
4303                 status = TP_ACPI_UWB_RADIOSSW;
4304         else
4305                 status = 0;
4306
4307         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4308                 return -EIO;
4309
4310         return 0;
4311 }
4312
4313 /* --------------------------------------------------------------------- */
4314
4315 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4316         .get_status = uwb_get_status,
4317         .set_status = uwb_set_status,
4318 };
4319
4320 static void uwb_exit(void)
4321 {
4322         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4323 }
4324
4325 static int __init uwb_init(struct ibm_init_struct *iibm)
4326 {
4327         int res;
4328         int status = 0;
4329
4330         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4331                         "initializing uwb subdriver\n");
4332
4333         TPACPI_ACPIHANDLE_INIT(hkey);
4334
4335         tp_features.uwb = hkey_handle &&
4336             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4337
4338         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4339                 "uwb is %s, status 0x%02x\n",
4340                 str_supported(tp_features.uwb),
4341                 status);
4342
4343 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4344         if (dbg_uwbemul) {
4345                 tp_features.uwb = 1;
4346                 printk(TPACPI_INFO
4347                         "uwb switch emulation enabled\n");
4348         } else
4349 #endif
4350         if (tp_features.uwb &&
4351             !(status & TP_ACPI_UWB_HWPRESENT)) {
4352                 /* no uwb hardware present in system */
4353                 tp_features.uwb = 0;
4354                 dbg_printk(TPACPI_DBG_INIT,
4355                            "uwb hardware not installed\n");
4356         }
4357
4358         if (!tp_features.uwb)
4359                 return 1;
4360
4361         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4362                                 &uwb_tprfk_ops,
4363                                 RFKILL_TYPE_UWB,
4364                                 TPACPI_RFK_UWB_SW_NAME,
4365                                 false);
4366         return res;
4367 }
4368
4369 static struct ibm_struct uwb_driver_data = {
4370         .name = "uwb",
4371         .exit = uwb_exit,
4372         .flags.experimental = 1,
4373 };
4374
4375 /*************************************************************************
4376  * Video subdriver
4377  */
4378
4379 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4380
4381 enum video_access_mode {
4382         TPACPI_VIDEO_NONE = 0,
4383         TPACPI_VIDEO_570,       /* 570 */
4384         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4385         TPACPI_VIDEO_NEW,       /* all others */
4386 };
4387
4388 enum {  /* video status flags, based on VIDEO_570 */
4389         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4390         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4391         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4392 };
4393
4394 enum {  /* TPACPI_VIDEO_570 constants */
4395         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4396         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4397                                                  * video_status_flags */
4398         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4399         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4400 };
4401
4402 static enum video_access_mode video_supported;
4403 static int video_orig_autosw;
4404
4405 static int video_autosw_get(void);
4406 static int video_autosw_set(int enable);
4407
4408 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4409
4410 static int __init video_init(struct ibm_init_struct *iibm)
4411 {
4412         int ivga;
4413
4414         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4415
4416         TPACPI_ACPIHANDLE_INIT(vid);
4417         TPACPI_ACPIHANDLE_INIT(vid2);
4418
4419         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4420                 /* G41, assume IVGA doesn't change */
4421                 vid_handle = vid2_handle;
4422
4423         if (!vid_handle)
4424                 /* video switching not supported on R30, R31 */
4425                 video_supported = TPACPI_VIDEO_NONE;
4426         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4427                 /* 570 */
4428                 video_supported = TPACPI_VIDEO_570;
4429         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4430                 /* 600e/x, 770e, 770x */
4431                 video_supported = TPACPI_VIDEO_770;
4432         else
4433                 /* all others */
4434                 video_supported = TPACPI_VIDEO_NEW;
4435
4436         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4437                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4438                 video_supported);
4439
4440         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4441 }
4442
4443 static void video_exit(void)
4444 {
4445         dbg_printk(TPACPI_DBG_EXIT,
4446                    "restoring original video autoswitch mode\n");
4447         if (video_autosw_set(video_orig_autosw))
4448                 printk(TPACPI_ERR "error while trying to restore original "
4449                         "video autoswitch mode\n");
4450 }
4451
4452 static int video_outputsw_get(void)
4453 {
4454         int status = 0;
4455         int i;
4456
4457         switch (video_supported) {
4458         case TPACPI_VIDEO_570:
4459                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4460                                  TP_ACPI_VIDEO_570_PHSCMD))
4461                         return -EIO;
4462                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4463                 break;
4464         case TPACPI_VIDEO_770:
4465                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4466                         return -EIO;
4467                 if (i)
4468                         status |= TP_ACPI_VIDEO_S_LCD;
4469                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4470                         return -EIO;
4471                 if (i)
4472                         status |= TP_ACPI_VIDEO_S_CRT;
4473                 break;
4474         case TPACPI_VIDEO_NEW:
4475                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4476                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4477                         return -EIO;
4478                 if (i)
4479                         status |= TP_ACPI_VIDEO_S_CRT;
4480
4481                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4482                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4483                         return -EIO;
4484                 if (i)
4485                         status |= TP_ACPI_VIDEO_S_LCD;
4486                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4487                         return -EIO;
4488                 if (i)
4489                         status |= TP_ACPI_VIDEO_S_DVI;
4490                 break;
4491         default:
4492                 return -ENOSYS;
4493         }
4494
4495         return status;
4496 }
4497
4498 static int video_outputsw_set(int status)
4499 {
4500         int autosw;
4501         int res = 0;
4502
4503         switch (video_supported) {
4504         case TPACPI_VIDEO_570:
4505                 res = acpi_evalf(NULL, NULL,
4506                                  "\\_SB.PHS2", "vdd",
4507                                  TP_ACPI_VIDEO_570_PHS2CMD,
4508                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4509                 break;
4510         case TPACPI_VIDEO_770:
4511                 autosw = video_autosw_get();
4512                 if (autosw < 0)
4513                         return autosw;
4514
4515                 res = video_autosw_set(1);
4516                 if (res)
4517                         return res;
4518                 res = acpi_evalf(vid_handle, NULL,
4519                                  "ASWT", "vdd", status * 0x100, 0);
4520                 if (!autosw && video_autosw_set(autosw)) {
4521                         printk(TPACPI_ERR
4522                                "video auto-switch left enabled due to error\n");
4523                         return -EIO;
4524                 }
4525                 break;
4526         case TPACPI_VIDEO_NEW:
4527                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4528                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4529                 break;
4530         default:
4531                 return -ENOSYS;
4532         }
4533
4534         return (res)? 0 : -EIO;
4535 }
4536
4537 static int video_autosw_get(void)
4538 {
4539         int autosw = 0;
4540
4541         switch (video_supported) {
4542         case TPACPI_VIDEO_570:
4543                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4544                         return -EIO;
4545                 break;
4546         case TPACPI_VIDEO_770:
4547         case TPACPI_VIDEO_NEW:
4548                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4549                         return -EIO;
4550                 break;
4551         default:
4552                 return -ENOSYS;
4553         }
4554
4555         return autosw & 1;
4556 }
4557
4558 static int video_autosw_set(int enable)
4559 {
4560         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4561                 return -EIO;
4562         return 0;
4563 }
4564
4565 static int video_outputsw_cycle(void)
4566 {
4567         int autosw = video_autosw_get();
4568         int res;
4569
4570         if (autosw < 0)
4571                 return autosw;
4572
4573         switch (video_supported) {
4574         case TPACPI_VIDEO_570:
4575                 res = video_autosw_set(1);
4576                 if (res)
4577                         return res;
4578                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4579                 break;
4580         case TPACPI_VIDEO_770:
4581         case TPACPI_VIDEO_NEW:
4582                 res = video_autosw_set(1);
4583                 if (res)
4584                         return res;
4585                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4586                 break;
4587         default:
4588                 return -ENOSYS;
4589         }
4590         if (!autosw && video_autosw_set(autosw)) {
4591                 printk(TPACPI_ERR
4592                        "video auto-switch left enabled due to error\n");
4593                 return -EIO;
4594         }
4595
4596         return (res)? 0 : -EIO;
4597 }
4598
4599 static int video_expand_toggle(void)
4600 {
4601         switch (video_supported) {
4602         case TPACPI_VIDEO_570:
4603                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4604                         0 : -EIO;
4605         case TPACPI_VIDEO_770:
4606                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4607                         0 : -EIO;
4608         case TPACPI_VIDEO_NEW:
4609                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4610                         0 : -EIO;
4611         default:
4612                 return -ENOSYS;
4613         }
4614         /* not reached */
4615 }
4616
4617 static int video_read(char *p)
4618 {
4619         int status, autosw;
4620         int len = 0;
4621
4622         if (video_supported == TPACPI_VIDEO_NONE) {
4623                 len += sprintf(p + len, "status:\t\tnot supported\n");
4624                 return len;
4625         }
4626
4627         status = video_outputsw_get();
4628         if (status < 0)
4629                 return status;
4630
4631         autosw = video_autosw_get();
4632         if (autosw < 0)
4633                 return autosw;
4634
4635         len += sprintf(p + len, "status:\t\tsupported\n");
4636         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4637         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4638         if (video_supported == TPACPI_VIDEO_NEW)
4639                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4640         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4641         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4642         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4643         if (video_supported == TPACPI_VIDEO_NEW)
4644                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4645         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4646         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4647
4648         return len;
4649 }
4650
4651 static int video_write(char *buf)
4652 {
4653         char *cmd;
4654         int enable, disable, status;
4655         int res;
4656
4657         if (video_supported == TPACPI_VIDEO_NONE)
4658                 return -ENODEV;
4659
4660         enable = 0;
4661         disable = 0;
4662
4663         while ((cmd = next_cmd(&buf))) {
4664                 if (strlencmp(cmd, "lcd_enable") == 0) {
4665                         enable |= TP_ACPI_VIDEO_S_LCD;
4666                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4667                         disable |= TP_ACPI_VIDEO_S_LCD;
4668                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4669                         enable |= TP_ACPI_VIDEO_S_CRT;
4670                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4671                         disable |= TP_ACPI_VIDEO_S_CRT;
4672                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4673                            strlencmp(cmd, "dvi_enable") == 0) {
4674                         enable |= TP_ACPI_VIDEO_S_DVI;
4675                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4676                            strlencmp(cmd, "dvi_disable") == 0) {
4677                         disable |= TP_ACPI_VIDEO_S_DVI;
4678                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4679                         res = video_autosw_set(1);
4680                         if (res)
4681                                 return res;
4682                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4683                         res = video_autosw_set(0);
4684                         if (res)
4685                                 return res;
4686                 } else if (strlencmp(cmd, "video_switch") == 0) {
4687                         res = video_outputsw_cycle();
4688                         if (res)
4689                                 return res;
4690                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4691                         res = video_expand_toggle();
4692                         if (res)
4693                                 return res;
4694                 } else
4695                         return -EINVAL;
4696         }
4697
4698         if (enable || disable) {
4699                 status = video_outputsw_get();
4700                 if (status < 0)
4701                         return status;
4702                 res = video_outputsw_set((status & ~disable) | enable);
4703                 if (res)
4704                         return res;
4705         }
4706
4707         return 0;
4708 }
4709
4710 static struct ibm_struct video_driver_data = {
4711         .name = "video",
4712         .read = video_read,
4713         .write = video_write,
4714         .exit = video_exit,
4715 };
4716
4717 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4718
4719 /*************************************************************************
4720  * Light (thinklight) subdriver
4721  */
4722
4723 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4724 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4725
4726 static int light_get_status(void)
4727 {
4728         int status = 0;
4729
4730         if (tp_features.light_status) {
4731                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4732                         return -EIO;
4733                 return (!!status);
4734         }
4735
4736         return -ENXIO;
4737 }
4738
4739 static int light_set_status(int status)
4740 {
4741         int rc;
4742
4743         if (tp_features.light) {
4744                 if (cmos_handle) {
4745                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4746                                         (status)?
4747                                                 TP_CMOS_THINKLIGHT_ON :
4748                                                 TP_CMOS_THINKLIGHT_OFF);
4749                 } else {
4750                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4751                                         (status)? 1 : 0);
4752                 }
4753                 return (rc)? 0 : -EIO;
4754         }
4755
4756         return -ENXIO;
4757 }
4758
4759 static void light_set_status_worker(struct work_struct *work)
4760 {
4761         struct tpacpi_led_classdev *data =
4762                         container_of(work, struct tpacpi_led_classdev, work);
4763
4764         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4765                 light_set_status((data->new_state != TPACPI_LED_OFF));
4766 }
4767
4768 static void light_sysfs_set(struct led_classdev *led_cdev,
4769                         enum led_brightness brightness)
4770 {
4771         struct tpacpi_led_classdev *data =
4772                 container_of(led_cdev,
4773                              struct tpacpi_led_classdev,
4774                              led_classdev);
4775         data->new_state = (brightness != LED_OFF) ?
4776                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4777         queue_work(tpacpi_wq, &data->work);
4778 }
4779
4780 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4781 {
4782         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4783 }
4784
4785 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4786         .led_classdev = {
4787                 .name           = "tpacpi::thinklight",
4788                 .brightness_set = &light_sysfs_set,
4789                 .brightness_get = &light_sysfs_get,
4790         }
4791 };
4792
4793 static int __init light_init(struct ibm_init_struct *iibm)
4794 {
4795         int rc;
4796
4797         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4798
4799         TPACPI_ACPIHANDLE_INIT(ledb);
4800         TPACPI_ACPIHANDLE_INIT(lght);
4801         TPACPI_ACPIHANDLE_INIT(cmos);
4802         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4803
4804         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4805         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4806
4807         if (tp_features.light)
4808                 /* light status not supported on
4809                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4810                 tp_features.light_status =
4811                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4812
4813         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4814                 str_supported(tp_features.light),
4815                 str_supported(tp_features.light_status));
4816
4817         if (!tp_features.light)
4818                 return 1;
4819
4820         rc = led_classdev_register(&tpacpi_pdev->dev,
4821                                    &tpacpi_led_thinklight.led_classdev);
4822
4823         if (rc < 0) {
4824                 tp_features.light = 0;
4825                 tp_features.light_status = 0;
4826         } else  {
4827                 rc = 0;
4828         }
4829
4830         return rc;
4831 }
4832
4833 static void light_exit(void)
4834 {
4835         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4836         if (work_pending(&tpacpi_led_thinklight.work))
4837                 flush_workqueue(tpacpi_wq);
4838 }
4839
4840 static int light_read(char *p)
4841 {
4842         int len = 0;
4843         int status;
4844
4845         if (!tp_features.light) {
4846                 len += sprintf(p + len, "status:\t\tnot supported\n");
4847         } else if (!tp_features.light_status) {
4848                 len += sprintf(p + len, "status:\t\tunknown\n");
4849                 len += sprintf(p + len, "commands:\ton, off\n");
4850         } else {
4851                 status = light_get_status();
4852                 if (status < 0)
4853                         return status;
4854                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4855                 len += sprintf(p + len, "commands:\ton, off\n");
4856         }
4857
4858         return len;
4859 }
4860
4861 static int light_write(char *buf)
4862 {
4863         char *cmd;
4864         int newstatus = 0;
4865
4866         if (!tp_features.light)
4867                 return -ENODEV;
4868
4869         while ((cmd = next_cmd(&buf))) {
4870                 if (strlencmp(cmd, "on") == 0) {
4871                         newstatus = 1;
4872                 } else if (strlencmp(cmd, "off") == 0) {
4873                         newstatus = 0;
4874                 } else
4875                         return -EINVAL;
4876         }
4877
4878         return light_set_status(newstatus);
4879 }
4880
4881 static struct ibm_struct light_driver_data = {
4882         .name = "light",
4883         .read = light_read,
4884         .write = light_write,
4885         .exit = light_exit,
4886 };
4887
4888 /*************************************************************************
4889  * CMOS subdriver
4890  */
4891
4892 /* sysfs cmos_command -------------------------------------------------- */
4893 static ssize_t cmos_command_store(struct device *dev,
4894                             struct device_attribute *attr,
4895                             const char *buf, size_t count)
4896 {
4897         unsigned long cmos_cmd;
4898         int res;
4899
4900         if (parse_strtoul(buf, 21, &cmos_cmd))
4901                 return -EINVAL;
4902
4903         res = issue_thinkpad_cmos_command(cmos_cmd);
4904         return (res)? res : count;
4905 }
4906
4907 static struct device_attribute dev_attr_cmos_command =
4908         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4909
4910 /* --------------------------------------------------------------------- */
4911
4912 static int __init cmos_init(struct ibm_init_struct *iibm)
4913 {
4914         int res;
4915
4916         vdbg_printk(TPACPI_DBG_INIT,
4917                 "initializing cmos commands subdriver\n");
4918
4919         TPACPI_ACPIHANDLE_INIT(cmos);
4920
4921         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4922                 str_supported(cmos_handle != NULL));
4923
4924         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4925         if (res)
4926                 return res;
4927
4928         return (cmos_handle)? 0 : 1;
4929 }
4930
4931 static void cmos_exit(void)
4932 {
4933         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4934 }
4935
4936 static int cmos_read(char *p)
4937 {
4938         int len = 0;
4939
4940         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4941            R30, R31, T20-22, X20-21 */
4942         if (!cmos_handle)
4943                 len += sprintf(p + len, "status:\t\tnot supported\n");
4944         else {
4945                 len += sprintf(p + len, "status:\t\tsupported\n");
4946                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4947         }
4948
4949         return len;
4950 }
4951
4952 static int cmos_write(char *buf)
4953 {
4954         char *cmd;
4955         int cmos_cmd, res;
4956
4957         while ((cmd = next_cmd(&buf))) {
4958                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4959                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4960                         /* cmos_cmd set */
4961                 } else
4962                         return -EINVAL;
4963
4964                 res = issue_thinkpad_cmos_command(cmos_cmd);
4965                 if (res)
4966                         return res;
4967         }
4968
4969         return 0;
4970 }
4971
4972 static struct ibm_struct cmos_driver_data = {
4973         .name = "cmos",
4974         .read = cmos_read,
4975         .write = cmos_write,
4976         .exit = cmos_exit,
4977 };
4978
4979 /*************************************************************************
4980  * LED subdriver
4981  */
4982
4983 enum led_access_mode {
4984         TPACPI_LED_NONE = 0,
4985         TPACPI_LED_570, /* 570 */
4986         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4987         TPACPI_LED_NEW, /* all others */
4988 };
4989
4990 enum {  /* For TPACPI_LED_OLD */
4991         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4992         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4993         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4994 };
4995
4996 static enum led_access_mode led_supported;
4997
4998 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4999            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
5000                                 /* T20-22, X20-21 */
5001            "LED",               /* all others */
5002            );                   /* R30, R31 */
5003
5004 #define TPACPI_LED_NUMLEDS 16
5005 static struct tpacpi_led_classdev *tpacpi_leds;
5006 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5007 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5008         /* there's a limit of 19 chars + NULL before 2.6.26 */
5009         "tpacpi::power",
5010         "tpacpi:orange:batt",
5011         "tpacpi:green:batt",
5012         "tpacpi::dock_active",
5013         "tpacpi::bay_active",
5014         "tpacpi::dock_batt",
5015         "tpacpi::unknown_led",
5016         "tpacpi::standby",
5017         "tpacpi::dock_status1",
5018         "tpacpi::dock_status2",
5019         "tpacpi::unknown_led2",
5020         "tpacpi::unknown_led3",
5021         "tpacpi::thinkvantage",
5022 };
5023 #define TPACPI_SAFE_LEDS        0x1081U
5024
5025 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5026 {
5027 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5028         return false;
5029 #else
5030         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5031 #endif
5032 }
5033
5034 static int led_get_status(const unsigned int led)
5035 {
5036         int status;
5037         enum led_status_t led_s;
5038
5039         switch (led_supported) {
5040         case TPACPI_LED_570:
5041                 if (!acpi_evalf(ec_handle,
5042                                 &status, "GLED", "dd", 1 << led))
5043                         return -EIO;
5044                 led_s = (status == 0)?
5045                                 TPACPI_LED_OFF :
5046                                 ((status == 1)?
5047                                         TPACPI_LED_ON :
5048                                         TPACPI_LED_BLINK);
5049                 tpacpi_led_state_cache[led] = led_s;
5050                 return led_s;
5051         default:
5052                 return -ENXIO;
5053         }
5054
5055         /* not reached */
5056 }
5057
5058 static int led_set_status(const unsigned int led,
5059                           const enum led_status_t ledstatus)
5060 {
5061         /* off, on, blink. Index is led_status_t */
5062         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5063         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5064
5065         int rc = 0;
5066
5067         switch (led_supported) {
5068         case TPACPI_LED_570:
5069                 /* 570 */
5070                 if (unlikely(led > 7))
5071                         return -EINVAL;
5072                 if (unlikely(tpacpi_is_led_restricted(led)))
5073                         return -EPERM;
5074                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5075                                 (1 << led), led_sled_arg1[ledstatus]))
5076                         rc = -EIO;
5077                 break;
5078         case TPACPI_LED_OLD:
5079                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5080                 if (unlikely(led > 7))
5081                         return -EINVAL;
5082                 if (unlikely(tpacpi_is_led_restricted(led)))
5083                         return -EPERM;
5084                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5085                 if (rc >= 0)
5086                         rc = ec_write(TPACPI_LED_EC_HLBL,
5087                                       (ledstatus == TPACPI_LED_BLINK) << led);
5088                 if (rc >= 0)
5089                         rc = ec_write(TPACPI_LED_EC_HLCL,
5090                                       (ledstatus != TPACPI_LED_OFF) << led);
5091                 break;
5092         case TPACPI_LED_NEW:
5093                 /* all others */
5094                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5095                         return -EINVAL;
5096                 if (unlikely(tpacpi_is_led_restricted(led)))
5097                         return -EPERM;
5098                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5099                                 led, led_led_arg1[ledstatus]))
5100                         rc = -EIO;
5101                 break;
5102         default:
5103                 rc = -ENXIO;
5104         }
5105
5106         if (!rc)
5107                 tpacpi_led_state_cache[led] = ledstatus;
5108
5109         return rc;
5110 }
5111
5112 static void led_set_status_worker(struct work_struct *work)
5113 {
5114         struct tpacpi_led_classdev *data =
5115                 container_of(work, struct tpacpi_led_classdev, work);
5116
5117         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5118                 led_set_status(data->led, data->new_state);
5119 }
5120
5121 static void led_sysfs_set(struct led_classdev *led_cdev,
5122                         enum led_brightness brightness)
5123 {
5124         struct tpacpi_led_classdev *data = container_of(led_cdev,
5125                              struct tpacpi_led_classdev, led_classdev);
5126
5127         if (brightness == LED_OFF)
5128                 data->new_state = TPACPI_LED_OFF;
5129         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5130                 data->new_state = TPACPI_LED_ON;
5131         else
5132                 data->new_state = TPACPI_LED_BLINK;
5133
5134         queue_work(tpacpi_wq, &data->work);
5135 }
5136
5137 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5138                         unsigned long *delay_on, unsigned long *delay_off)
5139 {
5140         struct tpacpi_led_classdev *data = container_of(led_cdev,
5141                              struct tpacpi_led_classdev, led_classdev);
5142
5143         /* Can we choose the flash rate? */
5144         if (*delay_on == 0 && *delay_off == 0) {
5145                 /* yes. set them to the hardware blink rate (1 Hz) */
5146                 *delay_on = 500; /* ms */
5147                 *delay_off = 500; /* ms */
5148         } else if ((*delay_on != 500) || (*delay_off != 500))
5149                 return -EINVAL;
5150
5151         data->new_state = TPACPI_LED_BLINK;
5152         queue_work(tpacpi_wq, &data->work);
5153
5154         return 0;
5155 }
5156
5157 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5158 {
5159         int rc;
5160
5161         struct tpacpi_led_classdev *data = container_of(led_cdev,
5162                              struct tpacpi_led_classdev, led_classdev);
5163
5164         rc = led_get_status(data->led);
5165
5166         if (rc == TPACPI_LED_OFF || rc < 0)
5167                 rc = LED_OFF;   /* no error handling in led class :( */
5168         else
5169                 rc = LED_FULL;
5170
5171         return rc;
5172 }
5173
5174 static void led_exit(void)
5175 {
5176         unsigned int i;
5177
5178         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5179                 if (tpacpi_leds[i].led_classdev.name)
5180                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5181         }
5182
5183         kfree(tpacpi_leds);
5184 }
5185
5186 static int __init tpacpi_init_led(unsigned int led)
5187 {
5188         int rc;
5189
5190         tpacpi_leds[led].led = led;
5191
5192         /* LEDs with no name don't get registered */
5193         if (!tpacpi_led_names[led])
5194                 return 0;
5195
5196         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5197         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5198         if (led_supported == TPACPI_LED_570)
5199                 tpacpi_leds[led].led_classdev.brightness_get =
5200                                                 &led_sysfs_get;
5201
5202         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5203
5204         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5205
5206         rc = led_classdev_register(&tpacpi_pdev->dev,
5207                                 &tpacpi_leds[led].led_classdev);
5208         if (rc < 0)
5209                 tpacpi_leds[led].led_classdev.name = NULL;
5210
5211         return rc;
5212 }
5213
5214 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5215         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5216         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5217         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5218
5219         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5220         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5221         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5222         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5223         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5224         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5225         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5226         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5227
5228         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5229         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5230         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5231         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5232         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5233
5234         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5235         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5236         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5237         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5238
5239         /* (1) - may have excess leds enabled on MSB */
5240
5241         /* Defaults (order matters, keep last, don't reorder!) */
5242         { /* Lenovo */
5243           .vendor = PCI_VENDOR_ID_LENOVO,
5244           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5245           .quirks = 0x1fffU,
5246         },
5247         { /* IBM ThinkPads with no EC version string */
5248           .vendor = PCI_VENDOR_ID_IBM,
5249           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5250           .quirks = 0x00ffU,
5251         },
5252         { /* IBM ThinkPads with EC version string */
5253           .vendor = PCI_VENDOR_ID_IBM,
5254           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5255           .quirks = 0x00bfU,
5256         },
5257 };
5258
5259 #undef TPACPI_LEDQ_IBM
5260 #undef TPACPI_LEDQ_LNV
5261
5262 static int __init led_init(struct ibm_init_struct *iibm)
5263 {
5264         unsigned int i;
5265         int rc;
5266         unsigned long useful_leds;
5267
5268         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5269
5270         TPACPI_ACPIHANDLE_INIT(led);
5271
5272         if (!led_handle)
5273                 /* led not supported on R30, R31 */
5274                 led_supported = TPACPI_LED_NONE;
5275         else if (strlencmp(led_path, "SLED") == 0)
5276                 /* 570 */
5277                 led_supported = TPACPI_LED_570;
5278         else if (strlencmp(led_path, "SYSL") == 0)
5279                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5280                 led_supported = TPACPI_LED_OLD;
5281         else
5282                 /* all others */
5283                 led_supported = TPACPI_LED_NEW;
5284
5285         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5286                 str_supported(led_supported), led_supported);
5287
5288         if (led_supported == TPACPI_LED_NONE)
5289                 return 1;
5290
5291         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5292                               GFP_KERNEL);
5293         if (!tpacpi_leds) {
5294                 printk(TPACPI_ERR "Out of memory for LED data\n");
5295                 return -ENOMEM;
5296         }
5297
5298         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5299                                           ARRAY_SIZE(led_useful_qtable));
5300
5301         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5302                 if (!tpacpi_is_led_restricted(i) &&
5303                     test_bit(i, &useful_leds)) {
5304                         rc = tpacpi_init_led(i);
5305                         if (rc < 0) {
5306                                 led_exit();
5307                                 return rc;
5308                         }
5309                 }
5310         }
5311
5312 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5313         printk(TPACPI_NOTICE
5314                 "warning: userspace override of important "
5315                 "firmware LEDs is enabled\n");
5316 #endif
5317         return 0;
5318 }
5319
5320 #define str_led_status(s) \
5321         ((s) == TPACPI_LED_OFF ? "off" : \
5322                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5323
5324 static int led_read(char *p)
5325 {
5326         int len = 0;
5327
5328         if (!led_supported) {
5329                 len += sprintf(p + len, "status:\t\tnot supported\n");
5330                 return len;
5331         }
5332         len += sprintf(p + len, "status:\t\tsupported\n");
5333
5334         if (led_supported == TPACPI_LED_570) {
5335                 /* 570 */
5336                 int i, status;
5337                 for (i = 0; i < 8; i++) {
5338                         status = led_get_status(i);
5339                         if (status < 0)
5340                                 return -EIO;
5341                         len += sprintf(p + len, "%d:\t\t%s\n",
5342                                        i, str_led_status(status));
5343                 }
5344         }
5345
5346         len += sprintf(p + len, "commands:\t"
5347                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5348
5349         return len;
5350 }
5351
5352 static int led_write(char *buf)
5353 {
5354         char *cmd;
5355         int led, rc;
5356         enum led_status_t s;
5357
5358         if (!led_supported)
5359                 return -ENODEV;
5360
5361         while ((cmd = next_cmd(&buf))) {
5362                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5363                         return -EINVAL;
5364
5365                 if (strstr(cmd, "off")) {
5366                         s = TPACPI_LED_OFF;
5367                 } else if (strstr(cmd, "on")) {
5368                         s = TPACPI_LED_ON;
5369                 } else if (strstr(cmd, "blink")) {
5370                         s = TPACPI_LED_BLINK;
5371                 } else {
5372                         return -EINVAL;
5373                 }
5374
5375                 rc = led_set_status(led, s);
5376                 if (rc < 0)
5377                         return rc;
5378         }
5379
5380         return 0;
5381 }
5382
5383 static struct ibm_struct led_driver_data = {
5384         .name = "led",
5385         .read = led_read,
5386         .write = led_write,
5387         .exit = led_exit,
5388 };
5389
5390 /*************************************************************************
5391  * Beep subdriver
5392  */
5393
5394 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5395
5396 #define TPACPI_BEEP_Q1 0x0001
5397
5398 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5399         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5400         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5401 };
5402
5403 static int __init beep_init(struct ibm_init_struct *iibm)
5404 {
5405         unsigned long quirks;
5406
5407         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5408
5409         TPACPI_ACPIHANDLE_INIT(beep);
5410
5411         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5412                 str_supported(beep_handle != NULL));
5413
5414         quirks = tpacpi_check_quirks(beep_quirk_table,
5415                                      ARRAY_SIZE(beep_quirk_table));
5416
5417         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5418
5419         return (beep_handle)? 0 : 1;
5420 }
5421
5422 static int beep_read(char *p)
5423 {
5424         int len = 0;
5425
5426         if (!beep_handle)
5427                 len += sprintf(p + len, "status:\t\tnot supported\n");
5428         else {
5429                 len += sprintf(p + len, "status:\t\tsupported\n");
5430                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5431         }
5432
5433         return len;
5434 }
5435
5436 static int beep_write(char *buf)
5437 {
5438         char *cmd;
5439         int beep_cmd;
5440
5441         if (!beep_handle)
5442                 return -ENODEV;
5443
5444         while ((cmd = next_cmd(&buf))) {
5445                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5446                     beep_cmd >= 0 && beep_cmd <= 17) {
5447                         /* beep_cmd set */
5448                 } else
5449                         return -EINVAL;
5450                 if (tp_features.beep_needs_two_args) {
5451                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5452                                         beep_cmd, 0))
5453                                 return -EIO;
5454                 } else {
5455                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5456                                         beep_cmd))
5457                                 return -EIO;
5458                 }
5459         }
5460
5461         return 0;
5462 }
5463
5464 static struct ibm_struct beep_driver_data = {
5465         .name = "beep",
5466         .read = beep_read,
5467         .write = beep_write,
5468 };
5469
5470 /*************************************************************************
5471  * Thermal subdriver
5472  */
5473
5474 enum thermal_access_mode {
5475         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5476         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5477         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5478         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5479         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5480 };
5481
5482 enum { /* TPACPI_THERMAL_TPEC_* */
5483         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5484         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5485         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5486 };
5487
5488 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5489 struct ibm_thermal_sensors_struct {
5490         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5491 };
5492
5493 static enum thermal_access_mode thermal_read_mode;
5494
5495 /* idx is zero-based */
5496 static int thermal_get_sensor(int idx, s32 *value)
5497 {
5498         int t;
5499         s8 tmp;
5500         char tmpi[5];
5501
5502         t = TP_EC_THERMAL_TMP0;
5503
5504         switch (thermal_read_mode) {
5505 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5506         case TPACPI_THERMAL_TPEC_16:
5507                 if (idx >= 8 && idx <= 15) {
5508                         t = TP_EC_THERMAL_TMP8;
5509                         idx -= 8;
5510                 }
5511                 /* fallthrough */
5512 #endif
5513         case TPACPI_THERMAL_TPEC_8:
5514                 if (idx <= 7) {
5515                         if (!acpi_ec_read(t + idx, &tmp))
5516                                 return -EIO;
5517                         *value = tmp * 1000;
5518                         return 0;
5519                 }
5520                 break;
5521
5522         case TPACPI_THERMAL_ACPI_UPDT:
5523                 if (idx <= 7) {
5524                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5525                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5526                                 return -EIO;
5527                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5528                                 return -EIO;
5529                         *value = (t - 2732) * 100;
5530                         return 0;
5531                 }
5532                 break;
5533
5534         case TPACPI_THERMAL_ACPI_TMP07:
5535                 if (idx <= 7) {
5536                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5537                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5538                                 return -EIO;
5539                         if (t > 127 || t < -127)
5540                                 t = TP_EC_THERMAL_TMP_NA;
5541                         *value = t * 1000;
5542                         return 0;
5543                 }
5544                 break;
5545
5546         case TPACPI_THERMAL_NONE:
5547         default:
5548                 return -ENOSYS;
5549         }
5550
5551         return -EINVAL;
5552 }
5553
5554 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5555 {
5556         int res, i;
5557         int n;
5558
5559         n = 8;
5560         i = 0;
5561
5562         if (!s)
5563                 return -EINVAL;
5564
5565         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5566                 n = 16;
5567
5568         for (i = 0 ; i < n; i++) {
5569                 res = thermal_get_sensor(i, &s->temp[i]);
5570                 if (res)
5571                         return res;
5572         }
5573
5574         return n;
5575 }
5576
5577 /* sysfs temp##_input -------------------------------------------------- */
5578
5579 static ssize_t thermal_temp_input_show(struct device *dev,
5580                            struct device_attribute *attr,
5581                            char *buf)
5582 {
5583         struct sensor_device_attribute *sensor_attr =
5584                                         to_sensor_dev_attr(attr);
5585         int idx = sensor_attr->index;
5586         s32 value;
5587         int res;
5588
5589         res = thermal_get_sensor(idx, &value);
5590         if (res)
5591                 return res;
5592         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5593                 return -ENXIO;
5594
5595         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5596 }
5597
5598 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5599          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5600                      thermal_temp_input_show, NULL, _idxB)
5601
5602 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5603         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5604         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5605         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5606         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5607         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5608         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5609         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5610         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5611         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5612         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5613         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5614         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5615         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5616         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5617         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5618         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5619 };
5620
5621 #define THERMAL_ATTRS(X) \
5622         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5623
5624 static struct attribute *thermal_temp_input_attr[] = {
5625         THERMAL_ATTRS(8),
5626         THERMAL_ATTRS(9),
5627         THERMAL_ATTRS(10),
5628         THERMAL_ATTRS(11),
5629         THERMAL_ATTRS(12),
5630         THERMAL_ATTRS(13),
5631         THERMAL_ATTRS(14),
5632         THERMAL_ATTRS(15),
5633         THERMAL_ATTRS(0),
5634         THERMAL_ATTRS(1),
5635         THERMAL_ATTRS(2),
5636         THERMAL_ATTRS(3),
5637         THERMAL_ATTRS(4),
5638         THERMAL_ATTRS(5),
5639         THERMAL_ATTRS(6),
5640         THERMAL_ATTRS(7),
5641         NULL
5642 };
5643
5644 static const struct attribute_group thermal_temp_input16_group = {
5645         .attrs = thermal_temp_input_attr
5646 };
5647
5648 static const struct attribute_group thermal_temp_input8_group = {
5649         .attrs = &thermal_temp_input_attr[8]
5650 };
5651
5652 #undef THERMAL_SENSOR_ATTR_TEMP
5653 #undef THERMAL_ATTRS
5654
5655 /* --------------------------------------------------------------------- */
5656
5657 static int __init thermal_init(struct ibm_init_struct *iibm)
5658 {
5659         u8 t, ta1, ta2;
5660         int i;
5661         int acpi_tmp7;
5662         int res;
5663
5664         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5665
5666         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5667
5668         if (thinkpad_id.ec_model) {
5669                 /*
5670                  * Direct EC access mode: sensors at registers
5671                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5672                  * non-implemented, thermal sensors return 0x80 when
5673                  * not available
5674                  */
5675
5676                 ta1 = ta2 = 0;
5677                 for (i = 0; i < 8; i++) {
5678                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5679                                 ta1 |= t;
5680                         } else {
5681                                 ta1 = 0;
5682                                 break;
5683                         }
5684                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5685                                 ta2 |= t;
5686                         } else {
5687                                 ta1 = 0;
5688                                 break;
5689                         }
5690                 }
5691                 if (ta1 == 0) {
5692                         /* This is sheer paranoia, but we handle it anyway */
5693                         if (acpi_tmp7) {
5694                                 printk(TPACPI_ERR
5695                                        "ThinkPad ACPI EC access misbehaving, "
5696                                        "falling back to ACPI TMPx access "
5697                                        "mode\n");
5698                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5699                         } else {
5700                                 printk(TPACPI_ERR
5701                                        "ThinkPad ACPI EC access misbehaving, "
5702                                        "disabling thermal sensors access\n");
5703                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5704                         }
5705                 } else {
5706                         thermal_read_mode =
5707                             (ta2 != 0) ?
5708                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5709                 }
5710         } else if (acpi_tmp7) {
5711                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5712                         /* 600e/x, 770e, 770x */
5713                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5714                 } else {
5715                         /* Standard ACPI TMPx access, max 8 sensors */
5716                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5717                 }
5718         } else {
5719                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5720                 thermal_read_mode = TPACPI_THERMAL_NONE;
5721         }
5722
5723         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5724                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5725                 thermal_read_mode);
5726
5727         switch (thermal_read_mode) {
5728         case TPACPI_THERMAL_TPEC_16:
5729                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5730                                 &thermal_temp_input16_group);
5731                 if (res)
5732                         return res;
5733                 break;
5734         case TPACPI_THERMAL_TPEC_8:
5735         case TPACPI_THERMAL_ACPI_TMP07:
5736         case TPACPI_THERMAL_ACPI_UPDT:
5737                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5738                                 &thermal_temp_input8_group);
5739                 if (res)
5740                         return res;
5741                 break;
5742         case TPACPI_THERMAL_NONE:
5743         default:
5744                 return 1;
5745         }
5746
5747         return 0;
5748 }
5749
5750 static void thermal_exit(void)
5751 {
5752         switch (thermal_read_mode) {
5753         case TPACPI_THERMAL_TPEC_16:
5754                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5755                                    &thermal_temp_input16_group);
5756                 break;
5757         case TPACPI_THERMAL_TPEC_8:
5758         case TPACPI_THERMAL_ACPI_TMP07:
5759         case TPACPI_THERMAL_ACPI_UPDT:
5760                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5761                                    &thermal_temp_input16_group);
5762                 break;
5763         case TPACPI_THERMAL_NONE:
5764         default:
5765                 break;
5766         }
5767 }
5768
5769 static int thermal_read(char *p)
5770 {
5771         int len = 0;
5772         int n, i;
5773         struct ibm_thermal_sensors_struct t;
5774
5775         n = thermal_get_sensors(&t);
5776         if (unlikely(n < 0))
5777                 return n;
5778
5779         len += sprintf(p + len, "temperatures:\t");
5780
5781         if (n > 0) {
5782                 for (i = 0; i < (n - 1); i++)
5783                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5784                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5785         } else
5786                 len += sprintf(p + len, "not supported\n");
5787
5788         return len;
5789 }
5790
5791 static struct ibm_struct thermal_driver_data = {
5792         .name = "thermal",
5793         .read = thermal_read,
5794         .exit = thermal_exit,
5795 };
5796
5797 /*************************************************************************
5798  * EC Dump subdriver
5799  */
5800
5801 static u8 ecdump_regs[256];
5802
5803 static int ecdump_read(char *p)
5804 {
5805         int len = 0;
5806         int i, j;
5807         u8 v;
5808
5809         len += sprintf(p + len, "EC      "
5810                        " +00 +01 +02 +03 +04 +05 +06 +07"
5811                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5812         for (i = 0; i < 256; i += 16) {
5813                 len += sprintf(p + len, "EC 0x%02x:", i);
5814                 for (j = 0; j < 16; j++) {
5815                         if (!acpi_ec_read(i + j, &v))
5816                                 break;
5817                         if (v != ecdump_regs[i + j])
5818                                 len += sprintf(p + len, " *%02x", v);
5819                         else
5820                                 len += sprintf(p + len, "  %02x", v);
5821                         ecdump_regs[i + j] = v;
5822                 }
5823                 len += sprintf(p + len, "\n");
5824                 if (j != 16)
5825                         break;
5826         }
5827
5828         /* These are way too dangerous to advertise openly... */
5829 #if 0
5830         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5831                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5832         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5833                        " (<offset> is 00-ff, <value> is 0-255)\n");
5834 #endif
5835         return len;
5836 }
5837
5838 static int ecdump_write(char *buf)
5839 {
5840         char *cmd;
5841         int i, v;
5842
5843         while ((cmd = next_cmd(&buf))) {
5844                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5845                         /* i and v set */
5846                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5847                         /* i and v set */
5848                 } else
5849                         return -EINVAL;
5850                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5851                         if (!acpi_ec_write(i, v))
5852                                 return -EIO;
5853                 } else
5854                         return -EINVAL;
5855         }
5856
5857         return 0;
5858 }
5859
5860 static struct ibm_struct ecdump_driver_data = {
5861         .name = "ecdump",
5862         .read = ecdump_read,
5863         .write = ecdump_write,
5864         .flags.experimental = 1,
5865 };
5866
5867 /*************************************************************************
5868  * Backlight/brightness subdriver
5869  */
5870
5871 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5872
5873 /*
5874  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5875  * CMOS NVRAM byte 0x5E, bits 0-3.
5876  *
5877  * EC HBRV (0x31) has the following layout
5878  *   Bit 7: unknown function
5879  *   Bit 6: unknown function
5880  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5881  *   Bit 4: must be set to zero to avoid problems
5882  *   Bit 3-0: backlight brightness level
5883  *
5884  * brightness_get_raw returns status data in the HBRV layout
5885  *
5886  * WARNING: The X61 has been verified to use HBRV for something else, so
5887  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5888  * testing on the very early *60 Lenovo models...
5889  */
5890
5891 enum {
5892         TP_EC_BACKLIGHT = 0x31,
5893
5894         /* TP_EC_BACKLIGHT bitmasks */
5895         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5896         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5897         TP_EC_BACKLIGHT_MAPSW = 0x20,
5898 };
5899
5900 enum tpacpi_brightness_access_mode {
5901         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5902         TPACPI_BRGHT_MODE_EC,           /* EC control */
5903         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5904         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5905         TPACPI_BRGHT_MODE_MAX
5906 };
5907
5908 static struct backlight_device *ibm_backlight_device;
5909
5910 static enum tpacpi_brightness_access_mode brightness_mode =
5911                 TPACPI_BRGHT_MODE_MAX;
5912
5913 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5914
5915 static struct mutex brightness_mutex;
5916
5917 /* NVRAM brightness access,
5918  * call with brightness_mutex held! */
5919 static unsigned int tpacpi_brightness_nvram_get(void)
5920 {
5921         u8 lnvram;
5922
5923         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5924                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5925                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5926         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5927
5928         return lnvram;
5929 }
5930
5931 static void tpacpi_brightness_checkpoint_nvram(void)
5932 {
5933         u8 lec = 0;
5934         u8 b_nvram;
5935
5936         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5937                 return;
5938
5939         vdbg_printk(TPACPI_DBG_BRGHT,
5940                 "trying to checkpoint backlight level to NVRAM...\n");
5941
5942         if (mutex_lock_killable(&brightness_mutex) < 0)
5943                 return;
5944
5945         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5946                 goto unlock;
5947         lec &= TP_EC_BACKLIGHT_LVLMSK;
5948         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5949
5950         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5951                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5952                 /* NVRAM needs update */
5953                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5954                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5955                 b_nvram |= lec;
5956                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5957                 dbg_printk(TPACPI_DBG_BRGHT,
5958                            "updated NVRAM backlight level to %u (0x%02x)\n",
5959                            (unsigned int) lec, (unsigned int) b_nvram);
5960         } else
5961                 vdbg_printk(TPACPI_DBG_BRGHT,
5962                            "NVRAM backlight level already is %u (0x%02x)\n",
5963                            (unsigned int) lec, (unsigned int) b_nvram);
5964
5965 unlock:
5966         mutex_unlock(&brightness_mutex);
5967 }
5968
5969
5970 /* call with brightness_mutex held! */
5971 static int tpacpi_brightness_get_raw(int *status)
5972 {
5973         u8 lec = 0;
5974
5975         switch (brightness_mode) {
5976         case TPACPI_BRGHT_MODE_UCMS_STEP:
5977                 *status = tpacpi_brightness_nvram_get();
5978                 return 0;
5979         case TPACPI_BRGHT_MODE_EC:
5980         case TPACPI_BRGHT_MODE_ECNVRAM:
5981                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5982                         return -EIO;
5983                 *status = lec;
5984                 return 0;
5985         default:
5986                 return -ENXIO;
5987         }
5988 }
5989
5990 /* call with brightness_mutex held! */
5991 /* do NOT call with illegal backlight level value */
5992 static int tpacpi_brightness_set_ec(unsigned int value)
5993 {
5994         u8 lec = 0;
5995
5996         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5997                 return -EIO;
5998
5999         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6000                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6001                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6002                 return -EIO;
6003
6004         return 0;
6005 }
6006
6007 /* call with brightness_mutex held! */
6008 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6009 {
6010         int cmos_cmd, inc;
6011         unsigned int current_value, i;
6012
6013         current_value = tpacpi_brightness_nvram_get();
6014
6015         if (value == current_value)
6016                 return 0;
6017
6018         cmos_cmd = (value > current_value) ?
6019                         TP_CMOS_BRIGHTNESS_UP :
6020                         TP_CMOS_BRIGHTNESS_DOWN;
6021         inc = (value > current_value) ? 1 : -1;
6022
6023         for (i = current_value; i != value; i += inc)
6024                 if (issue_thinkpad_cmos_command(cmos_cmd))
6025                         return -EIO;
6026
6027         return 0;
6028 }
6029
6030 /* May return EINTR which can always be mapped to ERESTARTSYS */
6031 static int brightness_set(unsigned int value)
6032 {
6033         int res;
6034
6035         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6036             value < 0)
6037                 return -EINVAL;
6038
6039         vdbg_printk(TPACPI_DBG_BRGHT,
6040                         "set backlight level to %d\n", value);
6041
6042         res = mutex_lock_killable(&brightness_mutex);
6043         if (res < 0)
6044                 return res;
6045
6046         switch (brightness_mode) {
6047         case TPACPI_BRGHT_MODE_EC:
6048         case TPACPI_BRGHT_MODE_ECNVRAM:
6049                 res = tpacpi_brightness_set_ec(value);
6050                 break;
6051         case TPACPI_BRGHT_MODE_UCMS_STEP:
6052                 res = tpacpi_brightness_set_ucmsstep(value);
6053                 break;
6054         default:
6055                 res = -ENXIO;
6056         }
6057
6058         mutex_unlock(&brightness_mutex);
6059         return res;
6060 }
6061
6062 /* sysfs backlight class ----------------------------------------------- */
6063
6064 static int brightness_update_status(struct backlight_device *bd)
6065 {
6066         unsigned int level =
6067                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6068                  bd->props.power == FB_BLANK_UNBLANK) ?
6069                                 bd->props.brightness : 0;
6070
6071         dbg_printk(TPACPI_DBG_BRGHT,
6072                         "backlight: attempt to set level to %d\n",
6073                         level);
6074
6075         /* it is the backlight class's job (caller) to handle
6076          * EINTR and other errors properly */
6077         return brightness_set(level);
6078 }
6079
6080 static int brightness_get(struct backlight_device *bd)
6081 {
6082         int status, res;
6083
6084         res = mutex_lock_killable(&brightness_mutex);
6085         if (res < 0)
6086                 return 0;
6087
6088         res = tpacpi_brightness_get_raw(&status);
6089
6090         mutex_unlock(&brightness_mutex);
6091
6092         if (res < 0)
6093                 return 0;
6094
6095         return status & TP_EC_BACKLIGHT_LVLMSK;
6096 }
6097
6098 static struct backlight_ops ibm_backlight_data = {
6099         .get_brightness = brightness_get,
6100         .update_status  = brightness_update_status,
6101 };
6102
6103 /* --------------------------------------------------------------------- */
6104
6105 /*
6106  * These are only useful for models that have only one possibility
6107  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6108  * these quirks.
6109  */
6110 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6111 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6112 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6113
6114 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6115         /* Models with ATI GPUs known to require ECNVRAM mode */
6116         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6117
6118         /* Models with ATI GPUs that can use ECNVRAM */
6119         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6120         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6121         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6122         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6123
6124         /* Models with Intel Extreme Graphics 2 */
6125         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6126         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6127         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
6128
6129         /* Models with Intel GMA900 */
6130         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6131         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6132         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6133 };
6134
6135 static int __init brightness_init(struct ibm_init_struct *iibm)
6136 {
6137         int b;
6138         unsigned long quirks;
6139
6140         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6141
6142         mutex_init(&brightness_mutex);
6143
6144         quirks = tpacpi_check_quirks(brightness_quirk_table,
6145                                 ARRAY_SIZE(brightness_quirk_table));
6146
6147         /*
6148          * We always attempt to detect acpi support, so as to switch
6149          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6150          * going to publish a backlight interface
6151          */
6152         b = tpacpi_check_std_acpi_brightness_support();
6153         if (b > 0) {
6154
6155                 if (acpi_video_backlight_support()) {
6156                         if (brightness_enable > 1) {
6157                                 printk(TPACPI_NOTICE
6158                                        "Standard ACPI backlight interface "
6159                                        "available, not loading native one.\n");
6160                                 return 1;
6161                         } else if (brightness_enable == 1) {
6162                                 printk(TPACPI_NOTICE
6163                                        "Backlight control force enabled, even if standard "
6164                                        "ACPI backlight interface is available\n");
6165                         }
6166                 } else {
6167                         if (brightness_enable > 1) {
6168                                 printk(TPACPI_NOTICE
6169                                        "Standard ACPI backlight interface not "
6170                                        "available, thinkpad_acpi native "
6171                                        "brightness control enabled\n");
6172                         }
6173                 }
6174         }
6175
6176         if (!brightness_enable) {
6177                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6178                            "brightness support disabled by "
6179                            "module parameter\n");
6180                 return 1;
6181         }
6182
6183         if (b > 16) {
6184                 printk(TPACPI_ERR
6185                        "Unsupported brightness interface, "
6186                        "please contact %s\n", TPACPI_MAIL);
6187                 return 1;
6188         }
6189         if (b == 16)
6190                 tp_features.bright_16levels = 1;
6191
6192         /*
6193          * Check for module parameter bogosity, note that we
6194          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6195          * able to detect "unspecified"
6196          */
6197         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6198                 return -EINVAL;
6199
6200         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6201         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6202             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6203                 if (quirks & TPACPI_BRGHT_Q_EC)
6204                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6205                 else
6206                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6207
6208                 dbg_printk(TPACPI_DBG_BRGHT,
6209                            "driver auto-selected brightness_mode=%d\n",
6210                            brightness_mode);
6211         }
6212
6213         /* Safety */
6214         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6215             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6216              brightness_mode == TPACPI_BRGHT_MODE_EC))
6217                 return -EINVAL;
6218
6219         if (tpacpi_brightness_get_raw(&b) < 0)
6220                 return 1;
6221
6222         if (tp_features.bright_16levels)
6223                 printk(TPACPI_INFO
6224                        "detected a 16-level brightness capable ThinkPad\n");
6225
6226         ibm_backlight_device = backlight_device_register(
6227                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6228                                         &ibm_backlight_data);
6229         if (IS_ERR(ibm_backlight_device)) {
6230                 int rc = PTR_ERR(ibm_backlight_device);
6231                 ibm_backlight_device = NULL;
6232                 printk(TPACPI_ERR "Could not register backlight device\n");
6233                 return rc;
6234         }
6235         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6236                         "brightness is supported\n");
6237
6238         if (quirks & TPACPI_BRGHT_Q_ASK) {
6239                 printk(TPACPI_NOTICE
6240                         "brightness: will use unverified default: "
6241                         "brightness_mode=%d\n", brightness_mode);
6242                 printk(TPACPI_NOTICE
6243                         "brightness: please report to %s whether it works well "
6244                         "or not on your ThinkPad\n", TPACPI_MAIL);
6245         }
6246
6247         ibm_backlight_device->props.max_brightness =
6248                                 (tp_features.bright_16levels)? 15 : 7;
6249         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6250         backlight_update_status(ibm_backlight_device);
6251
6252         return 0;
6253 }
6254
6255 static void brightness_suspend(pm_message_t state)
6256 {
6257         tpacpi_brightness_checkpoint_nvram();
6258 }
6259
6260 static void brightness_shutdown(void)
6261 {
6262         tpacpi_brightness_checkpoint_nvram();
6263 }
6264
6265 static void brightness_exit(void)
6266 {
6267         if (ibm_backlight_device) {
6268                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6269                             "calling backlight_device_unregister()\n");
6270                 backlight_device_unregister(ibm_backlight_device);
6271         }
6272
6273         tpacpi_brightness_checkpoint_nvram();
6274 }
6275
6276 static int brightness_read(char *p)
6277 {
6278         int len = 0;
6279         int level;
6280
6281         level = brightness_get(NULL);
6282         if (level < 0) {
6283                 len += sprintf(p + len, "level:\t\tunreadable\n");
6284         } else {
6285                 len += sprintf(p + len, "level:\t\t%d\n", level);
6286                 len += sprintf(p + len, "commands:\tup, down\n");
6287                 len += sprintf(p + len, "commands:\tlevel <level>"
6288                                " (<level> is 0-%d)\n",
6289                                (tp_features.bright_16levels) ? 15 : 7);
6290         }
6291
6292         return len;
6293 }
6294
6295 static int brightness_write(char *buf)
6296 {
6297         int level;
6298         int rc;
6299         char *cmd;
6300         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6301
6302         level = brightness_get(NULL);
6303         if (level < 0)
6304                 return level;
6305
6306         while ((cmd = next_cmd(&buf))) {
6307                 if (strlencmp(cmd, "up") == 0) {
6308                         if (level < max_level)
6309                                 level++;
6310                 } else if (strlencmp(cmd, "down") == 0) {
6311                         if (level > 0)
6312                                 level--;
6313                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6314                            level >= 0 && level <= max_level) {
6315                         /* new level set */
6316                 } else
6317                         return -EINVAL;
6318         }
6319
6320         tpacpi_disclose_usertask("procfs brightness",
6321                         "set level to %d\n", level);
6322
6323         /*
6324          * Now we know what the final level should be, so we try to set it.
6325          * Doing it this way makes the syscall restartable in case of EINTR
6326          */
6327         rc = brightness_set(level);
6328         return (rc == -EINTR)? -ERESTARTSYS : rc;
6329 }
6330
6331 static struct ibm_struct brightness_driver_data = {
6332         .name = "brightness",
6333         .read = brightness_read,
6334         .write = brightness_write,
6335         .exit = brightness_exit,
6336         .suspend = brightness_suspend,
6337         .shutdown = brightness_shutdown,
6338 };
6339
6340 /*************************************************************************
6341  * Volume subdriver
6342  */
6343
6344 static int volume_offset = 0x30;
6345
6346 static int volume_read(char *p)
6347 {
6348         int len = 0;
6349         u8 level;
6350
6351         if (!acpi_ec_read(volume_offset, &level)) {
6352                 len += sprintf(p + len, "level:\t\tunreadable\n");
6353         } else {
6354                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6355                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6356                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6357                 len += sprintf(p + len, "commands:\tlevel <level>"
6358                                " (<level> is 0-15)\n");
6359         }
6360
6361         return len;
6362 }
6363
6364 static int volume_write(char *buf)
6365 {
6366         int cmos_cmd, inc, i;
6367         u8 level, mute;
6368         int new_level, new_mute;
6369         char *cmd;
6370
6371         while ((cmd = next_cmd(&buf))) {
6372                 if (!acpi_ec_read(volume_offset, &level))
6373                         return -EIO;
6374                 new_mute = mute = level & 0x40;
6375                 new_level = level = level & 0xf;
6376
6377                 if (strlencmp(cmd, "up") == 0) {
6378                         if (mute)
6379                                 new_mute = 0;
6380                         else
6381                                 new_level = level == 15 ? 15 : level + 1;
6382                 } else if (strlencmp(cmd, "down") == 0) {
6383                         if (mute)
6384                                 new_mute = 0;
6385                         else
6386                                 new_level = level == 0 ? 0 : level - 1;
6387                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6388                            new_level >= 0 && new_level <= 15) {
6389                         /* new_level set */
6390                 } else if (strlencmp(cmd, "mute") == 0) {
6391                         new_mute = 0x40;
6392                 } else
6393                         return -EINVAL;
6394
6395                 if (new_level != level) {
6396                         /* mute doesn't change */
6397
6398                         cmos_cmd = (new_level > level) ?
6399                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6400                         inc = new_level > level ? 1 : -1;
6401
6402                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6403                                      !acpi_ec_write(volume_offset, level)))
6404                                 return -EIO;
6405
6406                         for (i = level; i != new_level; i += inc)
6407                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6408                                     !acpi_ec_write(volume_offset, i + inc))
6409                                         return -EIO;
6410
6411                         if (mute &&
6412                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6413                              !acpi_ec_write(volume_offset, new_level + mute))) {
6414                                 return -EIO;
6415                         }
6416                 }
6417
6418                 if (new_mute != mute) {
6419                         /* level doesn't change */
6420
6421                         cmos_cmd = (new_mute) ?
6422                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6423
6424                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6425                             !acpi_ec_write(volume_offset, level + new_mute))
6426                                 return -EIO;
6427                 }
6428         }
6429
6430         return 0;
6431 }
6432
6433 static struct ibm_struct volume_driver_data = {
6434         .name = "volume",
6435         .read = volume_read,
6436         .write = volume_write,
6437 };
6438
6439 /*************************************************************************
6440  * Fan subdriver
6441  */
6442
6443 /*
6444  * FAN ACCESS MODES
6445  *
6446  * TPACPI_FAN_RD_ACPI_GFAN:
6447  *      ACPI GFAN method: returns fan level
6448  *
6449  *      see TPACPI_FAN_WR_ACPI_SFAN
6450  *      EC 0x2f (HFSP) not available if GFAN exists
6451  *
6452  * TPACPI_FAN_WR_ACPI_SFAN:
6453  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6454  *
6455  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6456  *      it for writing.
6457  *
6458  * TPACPI_FAN_WR_TPEC:
6459  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6460  *      Supported on almost all ThinkPads
6461  *
6462  *      Fan speed changes of any sort (including those caused by the
6463  *      disengaged mode) are usually done slowly by the firmware as the
6464  *      maximum ammount of fan duty cycle change per second seems to be
6465  *      limited.
6466  *
6467  *      Reading is not available if GFAN exists.
6468  *      Writing is not available if SFAN exists.
6469  *
6470  *      Bits
6471  *       7      automatic mode engaged;
6472  *              (default operation mode of the ThinkPad)
6473  *              fan level is ignored in this mode.
6474  *       6      full speed mode (takes precedence over bit 7);
6475  *              not available on all thinkpads.  May disable
6476  *              the tachometer while the fan controller ramps up
6477  *              the speed (which can take up to a few *minutes*).
6478  *              Speeds up fan to 100% duty-cycle, which is far above
6479  *              the standard RPM levels.  It is not impossible that
6480  *              it could cause hardware damage.
6481  *      5-3     unused in some models.  Extra bits for fan level
6482  *              in others, but still useless as all values above
6483  *              7 map to the same speed as level 7 in these models.
6484  *      2-0     fan level (0..7 usually)
6485  *                      0x00 = stop
6486  *                      0x07 = max (set when temperatures critical)
6487  *              Some ThinkPads may have other levels, see
6488  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6489  *
6490  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6491  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6492  *      does so, its initial value is meaningless (0x07).
6493  *
6494  *      For firmware bugs, refer to:
6495  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6496  *
6497  *      ----
6498  *
6499  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6500  *      Main fan tachometer reading (in RPM)
6501  *
6502  *      This register is present on all ThinkPads with a new-style EC, and
6503  *      it is known not to be present on the A21m/e, and T22, as there is
6504  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6505  *      ThinkPads from this same time period (and earlier) probably lack the
6506  *      tachometer as well.
6507  *
6508  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6509  *      was never fixed by IBM to report the EC firmware version string
6510  *      probably support the tachometer (like the early X models), so
6511  *      detecting it is quite hard.  We need more data to know for sure.
6512  *
6513  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6514  *      might result.
6515  *
6516  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6517  *      mode.
6518  *
6519  *      For firmware bugs, refer to:
6520  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6521  *
6522  *      ----
6523  *
6524  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6525  *
6526  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6527  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6528  *      is one, the tachometer registers show the speed of the auxiliary
6529  *      fan.
6530  *
6531  *      Fan control seems to affect both fans, regardless of the state
6532  *      of this bit.
6533  *
6534  *      So far, only the firmware for the X60/X61 non-tablet versions
6535  *      seem to support this (firmware TP-7M).
6536  *
6537  * TPACPI_FAN_WR_ACPI_FANS:
6538  *      ThinkPad X31, X40, X41.  Not available in the X60.
6539  *
6540  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6541  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6542  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6543  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6544  *
6545  *      The speeds are stored on handles
6546  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6547  *
6548  *      There are three default speed sets, acessible as handles:
6549  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6550  *
6551  *      ACPI DSDT switches which set is in use depending on various
6552  *      factors.
6553  *
6554  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6555  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6556  *      but the ACPI tables just mention level 7.
6557  */
6558
6559 enum {                                  /* Fan control constants */
6560         fan_status_offset = 0x2f,       /* EC register 0x2f */
6561         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6562                                          * 0x84 must be read before 0x85 */
6563         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6564                                            bit 0 selects which fan is active */
6565
6566         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6567         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6568
6569         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6570 };
6571
6572 enum fan_status_access_mode {
6573         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6574         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6575         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6576 };
6577
6578 enum fan_control_access_mode {
6579         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6580         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6581         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6582         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6583 };
6584
6585 enum fan_control_commands {
6586         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6587         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6588         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6589                                                  * and also watchdog cmd */
6590 };
6591
6592 static int fan_control_allowed;
6593
6594 static enum fan_status_access_mode fan_status_access_mode;
6595 static enum fan_control_access_mode fan_control_access_mode;
6596 static enum fan_control_commands fan_control_commands;
6597
6598 static u8 fan_control_initial_status;
6599 static u8 fan_control_desired_level;
6600 static u8 fan_control_resume_level;
6601 static int fan_watchdog_maxinterval;
6602
6603 static struct mutex fan_mutex;
6604
6605 static void fan_watchdog_fire(struct work_struct *ignored);
6606 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6607
6608 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6609 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6610            "\\FSPD",            /* 600e/x, 770e, 770x */
6611            );                   /* all others */
6612 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6613            "JFNS",              /* 770x-JL */
6614            );                   /* all others */
6615
6616 /*
6617  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6618  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6619  * be in auto mode (0x80).
6620  *
6621  * This is corrected by any write to HFSP either by the driver, or
6622  * by the firmware.
6623  *
6624  * We assume 0x07 really means auto mode while this quirk is active,
6625  * as this is far more likely than the ThinkPad being in level 7,
6626  * which is only used by the firmware during thermal emergencies.
6627  *
6628  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6629  * TP-70 (T43, R52), which are known to be buggy.
6630  */
6631
6632 static void fan_quirk1_setup(void)
6633 {
6634         if (fan_control_initial_status == 0x07) {
6635                 printk(TPACPI_NOTICE
6636                        "fan_init: initial fan status is unknown, "
6637                        "assuming it is in auto mode\n");
6638                 tp_features.fan_ctrl_status_undef = 1;
6639         }
6640 }
6641
6642 static void fan_quirk1_handle(u8 *fan_status)
6643 {
6644         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6645                 if (*fan_status != fan_control_initial_status) {
6646                         /* something changed the HFSP regisnter since
6647                          * driver init time, so it is not undefined
6648                          * anymore */
6649                         tp_features.fan_ctrl_status_undef = 0;
6650                 } else {
6651                         /* Return most likely status. In fact, it
6652                          * might be the only possible status */
6653                         *fan_status = TP_EC_FAN_AUTO;
6654                 }
6655         }
6656 }
6657
6658 /* Select main fan on X60/X61, NOOP on others */
6659 static bool fan_select_fan1(void)
6660 {
6661         if (tp_features.second_fan) {
6662                 u8 val;
6663
6664                 if (ec_read(fan_select_offset, &val) < 0)
6665                         return false;
6666                 val &= 0xFEU;
6667                 if (ec_write(fan_select_offset, val) < 0)
6668                         return false;
6669         }
6670         return true;
6671 }
6672
6673 /* Select secondary fan on X60/X61 */
6674 static bool fan_select_fan2(void)
6675 {
6676         u8 val;
6677
6678         if (!tp_features.second_fan)
6679                 return false;
6680
6681         if (ec_read(fan_select_offset, &val) < 0)
6682                 return false;
6683         val |= 0x01U;
6684         if (ec_write(fan_select_offset, val) < 0)
6685                 return false;
6686
6687         return true;
6688 }
6689
6690 /*
6691  * Call with fan_mutex held
6692  */
6693 static void fan_update_desired_level(u8 status)
6694 {
6695         if ((status &
6696              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6697                 if (status > 7)
6698                         fan_control_desired_level = 7;
6699                 else
6700                         fan_control_desired_level = status;
6701         }
6702 }
6703
6704 static int fan_get_status(u8 *status)
6705 {
6706         u8 s;
6707
6708         /* TODO:
6709          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6710
6711         switch (fan_status_access_mode) {
6712         case TPACPI_FAN_RD_ACPI_GFAN:
6713                 /* 570, 600e/x, 770e, 770x */
6714
6715                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6716                         return -EIO;
6717
6718                 if (likely(status))
6719                         *status = s & 0x07;
6720
6721                 break;
6722
6723         case TPACPI_FAN_RD_TPEC:
6724                 /* all except 570, 600e/x, 770e, 770x */
6725                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6726                         return -EIO;
6727
6728                 if (likely(status)) {
6729                         *status = s;
6730                         fan_quirk1_handle(status);
6731                 }
6732
6733                 break;
6734
6735         default:
6736                 return -ENXIO;
6737         }
6738
6739         return 0;
6740 }
6741
6742 static int fan_get_status_safe(u8 *status)
6743 {
6744         int rc;
6745         u8 s;
6746
6747         if (mutex_lock_killable(&fan_mutex))
6748                 return -ERESTARTSYS;
6749         rc = fan_get_status(&s);
6750         if (!rc)
6751                 fan_update_desired_level(s);
6752         mutex_unlock(&fan_mutex);
6753
6754         if (status)
6755                 *status = s;
6756
6757         return rc;
6758 }
6759
6760 static int fan_get_speed(unsigned int *speed)
6761 {
6762         u8 hi, lo;
6763
6764         switch (fan_status_access_mode) {
6765         case TPACPI_FAN_RD_TPEC:
6766                 /* all except 570, 600e/x, 770e, 770x */
6767                 if (unlikely(!fan_select_fan1()))
6768                         return -EIO;
6769                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6770                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6771                         return -EIO;
6772
6773                 if (likely(speed))
6774                         *speed = (hi << 8) | lo;
6775
6776                 break;
6777
6778         default:
6779                 return -ENXIO;
6780         }
6781
6782         return 0;
6783 }
6784
6785 static int fan2_get_speed(unsigned int *speed)
6786 {
6787         u8 hi, lo;
6788         bool rc;
6789
6790         switch (fan_status_access_mode) {
6791         case TPACPI_FAN_RD_TPEC:
6792                 /* all except 570, 600e/x, 770e, 770x */
6793                 if (unlikely(!fan_select_fan2()))
6794                         return -EIO;
6795                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6796                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6797                 fan_select_fan1(); /* play it safe */
6798                 if (rc)
6799                         return -EIO;
6800
6801                 if (likely(speed))
6802                         *speed = (hi << 8) | lo;
6803
6804                 break;
6805
6806         default:
6807                 return -ENXIO;
6808         }
6809
6810         return 0;
6811 }
6812
6813 static int fan_set_level(int level)
6814 {
6815         if (!fan_control_allowed)
6816                 return -EPERM;
6817
6818         switch (fan_control_access_mode) {
6819         case TPACPI_FAN_WR_ACPI_SFAN:
6820                 if (level >= 0 && level <= 7) {
6821                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6822                                 return -EIO;
6823                 } else
6824                         return -EINVAL;
6825                 break;
6826
6827         case TPACPI_FAN_WR_ACPI_FANS:
6828         case TPACPI_FAN_WR_TPEC:
6829                 if (!(level & TP_EC_FAN_AUTO) &&
6830                     !(level & TP_EC_FAN_FULLSPEED) &&
6831                     ((level < 0) || (level > 7)))
6832                         return -EINVAL;
6833
6834                 /* safety net should the EC not support AUTO
6835                  * or FULLSPEED mode bits and just ignore them */
6836                 if (level & TP_EC_FAN_FULLSPEED)
6837                         level |= 7;     /* safety min speed 7 */
6838                 else if (level & TP_EC_FAN_AUTO)
6839                         level |= 4;     /* safety min speed 4 */
6840
6841                 if (!acpi_ec_write(fan_status_offset, level))
6842                         return -EIO;
6843                 else
6844                         tp_features.fan_ctrl_status_undef = 0;
6845                 break;
6846
6847         default:
6848                 return -ENXIO;
6849         }
6850
6851         vdbg_printk(TPACPI_DBG_FAN,
6852                 "fan control: set fan control register to 0x%02x\n", level);
6853         return 0;
6854 }
6855
6856 static int fan_set_level_safe(int level)
6857 {
6858         int rc;
6859
6860         if (!fan_control_allowed)
6861                 return -EPERM;
6862
6863         if (mutex_lock_killable(&fan_mutex))
6864                 return -ERESTARTSYS;
6865
6866         if (level == TPACPI_FAN_LAST_LEVEL)
6867                 level = fan_control_desired_level;
6868
6869         rc = fan_set_level(level);
6870         if (!rc)
6871                 fan_update_desired_level(level);
6872
6873         mutex_unlock(&fan_mutex);
6874         return rc;
6875 }
6876
6877 static int fan_set_enable(void)
6878 {
6879         u8 s;
6880         int rc;
6881
6882         if (!fan_control_allowed)
6883                 return -EPERM;
6884
6885         if (mutex_lock_killable(&fan_mutex))
6886                 return -ERESTARTSYS;
6887
6888         switch (fan_control_access_mode) {
6889         case TPACPI_FAN_WR_ACPI_FANS:
6890         case TPACPI_FAN_WR_TPEC:
6891                 rc = fan_get_status(&s);
6892                 if (rc < 0)
6893                         break;
6894
6895                 /* Don't go out of emergency fan mode */
6896                 if (s != 7) {
6897                         s &= 0x07;
6898                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6899                 }
6900
6901                 if (!acpi_ec_write(fan_status_offset, s))
6902                         rc = -EIO;
6903                 else {
6904                         tp_features.fan_ctrl_status_undef = 0;
6905                         rc = 0;
6906                 }
6907                 break;
6908
6909         case TPACPI_FAN_WR_ACPI_SFAN:
6910                 rc = fan_get_status(&s);
6911                 if (rc < 0)
6912                         break;
6913
6914                 s &= 0x07;
6915
6916                 /* Set fan to at least level 4 */
6917                 s |= 4;
6918
6919                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6920                         rc = -EIO;
6921                 else
6922                         rc = 0;
6923                 break;
6924
6925         default:
6926                 rc = -ENXIO;
6927         }
6928
6929         mutex_unlock(&fan_mutex);
6930
6931         if (!rc)
6932                 vdbg_printk(TPACPI_DBG_FAN,
6933                         "fan control: set fan control register to 0x%02x\n",
6934                         s);
6935         return rc;
6936 }
6937
6938 static int fan_set_disable(void)
6939 {
6940         int rc;
6941
6942         if (!fan_control_allowed)
6943                 return -EPERM;
6944
6945         if (mutex_lock_killable(&fan_mutex))
6946                 return -ERESTARTSYS;
6947
6948         rc = 0;
6949         switch (fan_control_access_mode) {
6950         case TPACPI_FAN_WR_ACPI_FANS:
6951         case TPACPI_FAN_WR_TPEC:
6952                 if (!acpi_ec_write(fan_status_offset, 0x00))
6953                         rc = -EIO;
6954                 else {
6955                         fan_control_desired_level = 0;
6956                         tp_features.fan_ctrl_status_undef = 0;
6957                 }
6958                 break;
6959
6960         case TPACPI_FAN_WR_ACPI_SFAN:
6961                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6962                         rc = -EIO;
6963                 else
6964                         fan_control_desired_level = 0;
6965                 break;
6966
6967         default:
6968                 rc = -ENXIO;
6969         }
6970
6971         if (!rc)
6972                 vdbg_printk(TPACPI_DBG_FAN,
6973                         "fan control: set fan control register to 0\n");
6974
6975         mutex_unlock(&fan_mutex);
6976         return rc;
6977 }
6978
6979 static int fan_set_speed(int speed)
6980 {
6981         int rc;
6982
6983         if (!fan_control_allowed)
6984                 return -EPERM;
6985
6986         if (mutex_lock_killable(&fan_mutex))
6987                 return -ERESTARTSYS;
6988
6989         rc = 0;
6990         switch (fan_control_access_mode) {
6991         case TPACPI_FAN_WR_ACPI_FANS:
6992                 if (speed >= 0 && speed <= 65535) {
6993                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6994                                         speed, speed, speed))
6995                                 rc = -EIO;
6996                 } else
6997                         rc = -EINVAL;
6998                 break;
6999
7000         default:
7001                 rc = -ENXIO;
7002         }
7003
7004         mutex_unlock(&fan_mutex);
7005         return rc;
7006 }
7007
7008 static void fan_watchdog_reset(void)
7009 {
7010         static int fan_watchdog_active;
7011
7012         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7013                 return;
7014
7015         if (fan_watchdog_active)
7016                 cancel_delayed_work(&fan_watchdog_task);
7017
7018         if (fan_watchdog_maxinterval > 0 &&
7019             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7020                 fan_watchdog_active = 1;
7021                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7022                                 msecs_to_jiffies(fan_watchdog_maxinterval
7023                                                  * 1000))) {
7024                         printk(TPACPI_ERR
7025                                "failed to queue the fan watchdog, "
7026                                "watchdog will not trigger\n");
7027                 }
7028         } else
7029                 fan_watchdog_active = 0;
7030 }
7031
7032 static void fan_watchdog_fire(struct work_struct *ignored)
7033 {
7034         int rc;
7035
7036         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7037                 return;
7038
7039         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7040         rc = fan_set_enable();
7041         if (rc < 0) {
7042                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7043                         "will try again later...\n", -rc);
7044                 /* reschedule for later */
7045                 fan_watchdog_reset();
7046         }
7047 }
7048
7049 /*
7050  * SYSFS fan layout: hwmon compatible (device)
7051  *
7052  * pwm*_enable:
7053  *      0: "disengaged" mode
7054  *      1: manual mode
7055  *      2: native EC "auto" mode (recommended, hardware default)
7056  *
7057  * pwm*: set speed in manual mode, ignored otherwise.
7058  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7059  *      interpolation.
7060  *
7061  * fan*_input: tachometer reading, RPM
7062  *
7063  *
7064  * SYSFS fan layout: extensions
7065  *
7066  * fan_watchdog (driver):
7067  *      fan watchdog interval in seconds, 0 disables (default), max 120
7068  */
7069
7070 /* sysfs fan pwm1_enable ----------------------------------------------- */
7071 static ssize_t fan_pwm1_enable_show(struct device *dev,
7072                                     struct device_attribute *attr,
7073                                     char *buf)
7074 {
7075         int res, mode;
7076         u8 status;
7077
7078         res = fan_get_status_safe(&status);
7079         if (res)
7080                 return res;
7081
7082         if (status & TP_EC_FAN_FULLSPEED) {
7083                 mode = 0;
7084         } else if (status & TP_EC_FAN_AUTO) {
7085                 mode = 2;
7086         } else
7087                 mode = 1;
7088
7089         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7090 }
7091
7092 static ssize_t fan_pwm1_enable_store(struct device *dev,
7093                                      struct device_attribute *attr,
7094                                      const char *buf, size_t count)
7095 {
7096         unsigned long t;
7097         int res, level;
7098
7099         if (parse_strtoul(buf, 2, &t))
7100                 return -EINVAL;
7101
7102         tpacpi_disclose_usertask("hwmon pwm1_enable",
7103                         "set fan mode to %lu\n", t);
7104
7105         switch (t) {
7106         case 0:
7107                 level = TP_EC_FAN_FULLSPEED;
7108                 break;
7109         case 1:
7110                 level = TPACPI_FAN_LAST_LEVEL;
7111                 break;
7112         case 2:
7113                 level = TP_EC_FAN_AUTO;
7114                 break;
7115         case 3:
7116                 /* reserved for software-controlled auto mode */
7117                 return -ENOSYS;
7118         default:
7119                 return -EINVAL;
7120         }
7121
7122         res = fan_set_level_safe(level);
7123         if (res == -ENXIO)
7124                 return -EINVAL;
7125         else if (res < 0)
7126                 return res;
7127
7128         fan_watchdog_reset();
7129
7130         return count;
7131 }
7132
7133 static struct device_attribute dev_attr_fan_pwm1_enable =
7134         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7135                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7136
7137 /* sysfs fan pwm1 ------------------------------------------------------ */
7138 static ssize_t fan_pwm1_show(struct device *dev,
7139                              struct device_attribute *attr,
7140                              char *buf)
7141 {
7142         int res;
7143         u8 status;
7144
7145         res = fan_get_status_safe(&status);
7146         if (res)
7147                 return res;
7148
7149         if ((status &
7150              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7151                 status = fan_control_desired_level;
7152
7153         if (status > 7)
7154                 status = 7;
7155
7156         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7157 }
7158
7159 static ssize_t fan_pwm1_store(struct device *dev,
7160                               struct device_attribute *attr,
7161                               const char *buf, size_t count)
7162 {
7163         unsigned long s;
7164         int rc;
7165         u8 status, newlevel;
7166
7167         if (parse_strtoul(buf, 255, &s))
7168                 return -EINVAL;
7169
7170         tpacpi_disclose_usertask("hwmon pwm1",
7171                         "set fan speed to %lu\n", s);
7172
7173         /* scale down from 0-255 to 0-7 */
7174         newlevel = (s >> 5) & 0x07;
7175
7176         if (mutex_lock_killable(&fan_mutex))
7177                 return -ERESTARTSYS;
7178
7179         rc = fan_get_status(&status);
7180         if (!rc && (status &
7181                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7182                 rc = fan_set_level(newlevel);
7183                 if (rc == -ENXIO)
7184                         rc = -EINVAL;
7185                 else if (!rc) {
7186                         fan_update_desired_level(newlevel);
7187                         fan_watchdog_reset();
7188                 }
7189         }
7190
7191         mutex_unlock(&fan_mutex);
7192         return (rc)? rc : count;
7193 }
7194
7195 static struct device_attribute dev_attr_fan_pwm1 =
7196         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7197                 fan_pwm1_show, fan_pwm1_store);
7198
7199 /* sysfs fan fan1_input ------------------------------------------------ */
7200 static ssize_t fan_fan1_input_show(struct device *dev,
7201                            struct device_attribute *attr,
7202                            char *buf)
7203 {
7204         int res;
7205         unsigned int speed;
7206
7207         res = fan_get_speed(&speed);
7208         if (res < 0)
7209                 return res;
7210
7211         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7212 }
7213
7214 static struct device_attribute dev_attr_fan_fan1_input =
7215         __ATTR(fan1_input, S_IRUGO,
7216                 fan_fan1_input_show, NULL);
7217
7218 /* sysfs fan fan2_input ------------------------------------------------ */
7219 static ssize_t fan_fan2_input_show(struct device *dev,
7220                            struct device_attribute *attr,
7221                            char *buf)
7222 {
7223         int res;
7224         unsigned int speed;
7225
7226         res = fan2_get_speed(&speed);
7227         if (res < 0)
7228                 return res;
7229
7230         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7231 }
7232
7233 static struct device_attribute dev_attr_fan_fan2_input =
7234         __ATTR(fan2_input, S_IRUGO,
7235                 fan_fan2_input_show, NULL);
7236
7237 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7238 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7239                                      char *buf)
7240 {
7241         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7242 }
7243
7244 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7245                                       const char *buf, size_t count)
7246 {
7247         unsigned long t;
7248
7249         if (parse_strtoul(buf, 120, &t))
7250                 return -EINVAL;
7251
7252         if (!fan_control_allowed)
7253                 return -EPERM;
7254
7255         fan_watchdog_maxinterval = t;
7256         fan_watchdog_reset();
7257
7258         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7259
7260         return count;
7261 }
7262
7263 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7264                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7265
7266 /* --------------------------------------------------------------------- */
7267 static struct attribute *fan_attributes[] = {
7268         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7269         &dev_attr_fan_fan1_input.attr,
7270         NULL, /* for fan2_input */
7271         NULL
7272 };
7273
7274 static const struct attribute_group fan_attr_group = {
7275         .attrs = fan_attributes,
7276 };
7277
7278 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7279 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7280
7281 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7282         { .vendor = PCI_VENDOR_ID_IBM,          \
7283           .bios = TPACPI_MATCH_ANY,             \
7284           .ec = TPID(__id1, __id2),             \
7285           .quirks = __quirks }
7286
7287 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7288         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7289           .bios = TPACPI_MATCH_ANY,             \
7290           .ec = TPID(__id1, __id2),             \
7291           .quirks = __quirks }
7292
7293 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7294         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7295         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7296         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7297         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7298         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7299 };
7300
7301 #undef TPACPI_FAN_QL
7302 #undef TPACPI_FAN_QI
7303
7304 static int __init fan_init(struct ibm_init_struct *iibm)
7305 {
7306         int rc;
7307         unsigned long quirks;
7308
7309         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7310                         "initializing fan subdriver\n");
7311
7312         mutex_init(&fan_mutex);
7313         fan_status_access_mode = TPACPI_FAN_NONE;
7314         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7315         fan_control_commands = 0;
7316         fan_watchdog_maxinterval = 0;
7317         tp_features.fan_ctrl_status_undef = 0;
7318         tp_features.second_fan = 0;
7319         fan_control_desired_level = 7;
7320
7321         TPACPI_ACPIHANDLE_INIT(fans);
7322         TPACPI_ACPIHANDLE_INIT(gfan);
7323         TPACPI_ACPIHANDLE_INIT(sfan);
7324
7325         quirks = tpacpi_check_quirks(fan_quirk_table,
7326                                      ARRAY_SIZE(fan_quirk_table));
7327
7328         if (gfan_handle) {
7329                 /* 570, 600e/x, 770e, 770x */
7330                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7331         } else {
7332                 /* all other ThinkPads: note that even old-style
7333                  * ThinkPad ECs supports the fan control register */
7334                 if (likely(acpi_ec_read(fan_status_offset,
7335                                         &fan_control_initial_status))) {
7336                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7337                         if (quirks & TPACPI_FAN_Q1)
7338                                 fan_quirk1_setup();
7339                         if (quirks & TPACPI_FAN_2FAN) {
7340                                 tp_features.second_fan = 1;
7341                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7342                                         "secondary fan support enabled\n");
7343                         }
7344                 } else {
7345                         printk(TPACPI_ERR
7346                                "ThinkPad ACPI EC access misbehaving, "
7347                                "fan status and control unavailable\n");
7348                         return 1;
7349                 }
7350         }
7351
7352         if (sfan_handle) {
7353                 /* 570, 770x-JL */
7354                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7355                 fan_control_commands |=
7356                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7357         } else {
7358                 if (!gfan_handle) {
7359                         /* gfan without sfan means no fan control */
7360                         /* all other models implement TP EC 0x2f control */
7361
7362                         if (fans_handle) {
7363                                 /* X31, X40, X41 */
7364                                 fan_control_access_mode =
7365                                     TPACPI_FAN_WR_ACPI_FANS;
7366                                 fan_control_commands |=
7367                                     TPACPI_FAN_CMD_SPEED |
7368                                     TPACPI_FAN_CMD_LEVEL |
7369                                     TPACPI_FAN_CMD_ENABLE;
7370                         } else {
7371                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7372                                 fan_control_commands |=
7373                                     TPACPI_FAN_CMD_LEVEL |
7374                                     TPACPI_FAN_CMD_ENABLE;
7375                         }
7376                 }
7377         }
7378
7379         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7380                 "fan is %s, modes %d, %d\n",
7381                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7382                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7383                 fan_status_access_mode, fan_control_access_mode);
7384
7385         /* fan control master switch */
7386         if (!fan_control_allowed) {
7387                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7388                 fan_control_commands = 0;
7389                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7390                            "fan control features disabled by parameter\n");
7391         }
7392
7393         /* update fan_control_desired_level */
7394         if (fan_status_access_mode != TPACPI_FAN_NONE)
7395                 fan_get_status_safe(NULL);
7396
7397         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7398             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7399                 if (tp_features.second_fan) {
7400                         /* attach second fan tachometer */
7401                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7402                                         &dev_attr_fan_fan2_input.attr;
7403                 }
7404                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7405                                          &fan_attr_group);
7406                 if (rc < 0)
7407                         return rc;
7408
7409                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7410                                         &driver_attr_fan_watchdog);
7411                 if (rc < 0) {
7412                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7413                                         &fan_attr_group);
7414                         return rc;
7415                 }
7416                 return 0;
7417         } else
7418                 return 1;
7419 }
7420
7421 static void fan_exit(void)
7422 {
7423         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7424                     "cancelling any pending fan watchdog tasks\n");
7425
7426         /* FIXME: can we really do this unconditionally? */
7427         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7428         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7429                            &driver_attr_fan_watchdog);
7430
7431         cancel_delayed_work(&fan_watchdog_task);
7432         flush_workqueue(tpacpi_wq);
7433 }
7434
7435 static void fan_suspend(pm_message_t state)
7436 {
7437         int rc;
7438
7439         if (!fan_control_allowed)
7440                 return;
7441
7442         /* Store fan status in cache */
7443         fan_control_resume_level = 0;
7444         rc = fan_get_status_safe(&fan_control_resume_level);
7445         if (rc < 0)
7446                 printk(TPACPI_NOTICE
7447                         "failed to read fan level for later "
7448                         "restore during resume: %d\n", rc);
7449
7450         /* if it is undefined, don't attempt to restore it.
7451          * KEEP THIS LAST */
7452         if (tp_features.fan_ctrl_status_undef)
7453                 fan_control_resume_level = 0;
7454 }
7455
7456 static void fan_resume(void)
7457 {
7458         u8 current_level = 7;
7459         bool do_set = false;
7460         int rc;
7461
7462         /* DSDT *always* updates status on resume */
7463         tp_features.fan_ctrl_status_undef = 0;
7464
7465         if (!fan_control_allowed ||
7466             !fan_control_resume_level ||
7467             (fan_get_status_safe(&current_level) < 0))
7468                 return;
7469
7470         switch (fan_control_access_mode) {
7471         case TPACPI_FAN_WR_ACPI_SFAN:
7472                 /* never decrease fan level */
7473                 do_set = (fan_control_resume_level > current_level);
7474                 break;
7475         case TPACPI_FAN_WR_ACPI_FANS:
7476         case TPACPI_FAN_WR_TPEC:
7477                 /* never decrease fan level, scale is:
7478                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7479                  *
7480                  * We expect the firmware to set either 7 or AUTO, but we
7481                  * handle FULLSPEED out of paranoia.
7482                  *
7483                  * So, we can safely only restore FULLSPEED or 7, anything
7484                  * else could slow the fan.  Restoring AUTO is useless, at
7485                  * best that's exactly what the DSDT already set (it is the
7486                  * slower it uses).
7487                  *
7488                  * Always keep in mind that the DSDT *will* have set the
7489                  * fans to what the vendor supposes is the best level.  We
7490                  * muck with it only to speed the fan up.
7491                  */
7492                 if (fan_control_resume_level != 7 &&
7493                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7494                         return;
7495                 else
7496                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7497                                  (current_level != fan_control_resume_level);
7498                 break;
7499         default:
7500                 return;
7501         }
7502         if (do_set) {
7503                 printk(TPACPI_NOTICE
7504                         "restoring fan level to 0x%02x\n",
7505                         fan_control_resume_level);
7506                 rc = fan_set_level_safe(fan_control_resume_level);
7507                 if (rc < 0)
7508                         printk(TPACPI_NOTICE
7509                                 "failed to restore fan level: %d\n", rc);
7510         }
7511 }
7512
7513 static int fan_read(char *p)
7514 {
7515         int len = 0;
7516         int rc;
7517         u8 status;
7518         unsigned int speed = 0;
7519
7520         switch (fan_status_access_mode) {
7521         case TPACPI_FAN_RD_ACPI_GFAN:
7522                 /* 570, 600e/x, 770e, 770x */
7523                 rc = fan_get_status_safe(&status);
7524                 if (rc < 0)
7525                         return rc;
7526
7527                 len += sprintf(p + len, "status:\t\t%s\n"
7528                                "level:\t\t%d\n",
7529                                (status != 0) ? "enabled" : "disabled", status);
7530                 break;
7531
7532         case TPACPI_FAN_RD_TPEC:
7533                 /* all except 570, 600e/x, 770e, 770x */
7534                 rc = fan_get_status_safe(&status);
7535                 if (rc < 0)
7536                         return rc;
7537
7538                 len += sprintf(p + len, "status:\t\t%s\n",
7539                                (status != 0) ? "enabled" : "disabled");
7540
7541                 rc = fan_get_speed(&speed);
7542                 if (rc < 0)
7543                         return rc;
7544
7545                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7546
7547                 if (status & TP_EC_FAN_FULLSPEED)
7548                         /* Disengaged mode takes precedence */
7549                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7550                 else if (status & TP_EC_FAN_AUTO)
7551                         len += sprintf(p + len, "level:\t\tauto\n");
7552                 else
7553                         len += sprintf(p + len, "level:\t\t%d\n", status);
7554                 break;
7555
7556         case TPACPI_FAN_NONE:
7557         default:
7558                 len += sprintf(p + len, "status:\t\tnot supported\n");
7559         }
7560
7561         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7562                 len += sprintf(p + len, "commands:\tlevel <level>");
7563
7564                 switch (fan_control_access_mode) {
7565                 case TPACPI_FAN_WR_ACPI_SFAN:
7566                         len += sprintf(p + len, " (<level> is 0-7)\n");
7567                         break;
7568
7569                 default:
7570                         len += sprintf(p + len, " (<level> is 0-7, "
7571                                        "auto, disengaged, full-speed)\n");
7572                         break;
7573                 }
7574         }
7575
7576         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7577                 len += sprintf(p + len, "commands:\tenable, disable\n"
7578                                "commands:\twatchdog <timeout> (<timeout> "
7579                                "is 0 (off), 1-120 (seconds))\n");
7580
7581         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7582                 len += sprintf(p + len, "commands:\tspeed <speed>"
7583                                " (<speed> is 0-65535)\n");
7584
7585         return len;
7586 }
7587
7588 static int fan_write_cmd_level(const char *cmd, int *rc)
7589 {
7590         int level;
7591
7592         if (strlencmp(cmd, "level auto") == 0)
7593                 level = TP_EC_FAN_AUTO;
7594         else if ((strlencmp(cmd, "level disengaged") == 0) |
7595                         (strlencmp(cmd, "level full-speed") == 0))
7596                 level = TP_EC_FAN_FULLSPEED;
7597         else if (sscanf(cmd, "level %d", &level) != 1)
7598                 return 0;
7599
7600         *rc = fan_set_level_safe(level);
7601         if (*rc == -ENXIO)
7602                 printk(TPACPI_ERR "level command accepted for unsupported "
7603                        "access mode %d", fan_control_access_mode);
7604         else if (!*rc)
7605                 tpacpi_disclose_usertask("procfs fan",
7606                         "set level to %d\n", level);
7607
7608         return 1;
7609 }
7610
7611 static int fan_write_cmd_enable(const char *cmd, int *rc)
7612 {
7613         if (strlencmp(cmd, "enable") != 0)
7614                 return 0;
7615
7616         *rc = fan_set_enable();
7617         if (*rc == -ENXIO)
7618                 printk(TPACPI_ERR "enable command accepted for unsupported "
7619                        "access mode %d", fan_control_access_mode);
7620         else if (!*rc)
7621                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7622
7623         return 1;
7624 }
7625
7626 static int fan_write_cmd_disable(const char *cmd, int *rc)
7627 {
7628         if (strlencmp(cmd, "disable") != 0)
7629                 return 0;
7630
7631         *rc = fan_set_disable();
7632         if (*rc == -ENXIO)
7633                 printk(TPACPI_ERR "disable command accepted for unsupported "
7634                        "access mode %d", fan_control_access_mode);
7635         else if (!*rc)
7636                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7637
7638         return 1;
7639 }
7640
7641 static int fan_write_cmd_speed(const char *cmd, int *rc)
7642 {
7643         int speed;
7644
7645         /* TODO:
7646          * Support speed <low> <medium> <high> ? */
7647
7648         if (sscanf(cmd, "speed %d", &speed) != 1)
7649                 return 0;
7650
7651         *rc = fan_set_speed(speed);
7652         if (*rc == -ENXIO)
7653                 printk(TPACPI_ERR "speed command accepted for unsupported "
7654                        "access mode %d", fan_control_access_mode);
7655         else if (!*rc)
7656                 tpacpi_disclose_usertask("procfs fan",
7657                         "set speed to %d\n", speed);
7658
7659         return 1;
7660 }
7661
7662 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7663 {
7664         int interval;
7665
7666         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7667                 return 0;
7668
7669         if (interval < 0 || interval > 120)
7670                 *rc = -EINVAL;
7671         else {
7672                 fan_watchdog_maxinterval = interval;
7673                 tpacpi_disclose_usertask("procfs fan",
7674                         "set watchdog timer to %d\n",
7675                         interval);
7676         }
7677
7678         return 1;
7679 }
7680
7681 static int fan_write(char *buf)
7682 {
7683         char *cmd;
7684         int rc = 0;
7685
7686         while (!rc && (cmd = next_cmd(&buf))) {
7687                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7688                       fan_write_cmd_level(cmd, &rc)) &&
7689                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7690                       (fan_write_cmd_enable(cmd, &rc) ||
7691                        fan_write_cmd_disable(cmd, &rc) ||
7692                        fan_write_cmd_watchdog(cmd, &rc))) &&
7693                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7694                       fan_write_cmd_speed(cmd, &rc))
7695                     )
7696                         rc = -EINVAL;
7697                 else if (!rc)
7698                         fan_watchdog_reset();
7699         }
7700
7701         return rc;
7702 }
7703
7704 static struct ibm_struct fan_driver_data = {
7705         .name = "fan",
7706         .read = fan_read,
7707         .write = fan_write,
7708         .exit = fan_exit,
7709         .suspend = fan_suspend,
7710         .resume = fan_resume,
7711 };
7712
7713 /****************************************************************************
7714  ****************************************************************************
7715  *
7716  * Infrastructure
7717  *
7718  ****************************************************************************
7719  ****************************************************************************/
7720
7721 /*
7722  * HKEY event callout for other subdrivers go here
7723  * (yes, it is ugly, but it is quick, safe, and gets the job done
7724  */
7725 static void tpacpi_driver_event(const unsigned int hkey_event)
7726 {
7727 }
7728
7729
7730
7731 static void hotkey_driver_event(const unsigned int scancode)
7732 {
7733         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
7734 }
7735
7736 /* sysfs name ---------------------------------------------------------- */
7737 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7738                            struct device_attribute *attr,
7739                            char *buf)
7740 {
7741         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7742 }
7743
7744 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7745         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7746
7747 /* --------------------------------------------------------------------- */
7748
7749 /* /proc support */
7750 static struct proc_dir_entry *proc_dir;
7751
7752 /*
7753  * Module and infrastructure proble, init and exit handling
7754  */
7755
7756 static int force_load;
7757
7758 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7759 static const char * __init str_supported(int is_supported)
7760 {
7761         static char text_unsupported[] __initdata = "not supported";
7762
7763         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7764 }
7765 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7766
7767 static void ibm_exit(struct ibm_struct *ibm)
7768 {
7769         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7770
7771         list_del_init(&ibm->all_drivers);
7772
7773         if (ibm->flags.acpi_notify_installed) {
7774                 dbg_printk(TPACPI_DBG_EXIT,
7775                         "%s: acpi_remove_notify_handler\n", ibm->name);
7776                 BUG_ON(!ibm->acpi);
7777                 acpi_remove_notify_handler(*ibm->acpi->handle,
7778                                            ibm->acpi->type,
7779                                            dispatch_acpi_notify);
7780                 ibm->flags.acpi_notify_installed = 0;
7781                 ibm->flags.acpi_notify_installed = 0;
7782         }
7783
7784         if (ibm->flags.proc_created) {
7785                 dbg_printk(TPACPI_DBG_EXIT,
7786                         "%s: remove_proc_entry\n", ibm->name);
7787                 remove_proc_entry(ibm->name, proc_dir);
7788                 ibm->flags.proc_created = 0;
7789         }
7790
7791         if (ibm->flags.acpi_driver_registered) {
7792                 dbg_printk(TPACPI_DBG_EXIT,
7793                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7794                 BUG_ON(!ibm->acpi);
7795                 acpi_bus_unregister_driver(ibm->acpi->driver);
7796                 kfree(ibm->acpi->driver);
7797                 ibm->acpi->driver = NULL;
7798                 ibm->flags.acpi_driver_registered = 0;
7799         }
7800
7801         if (ibm->flags.init_called && ibm->exit) {
7802                 ibm->exit();
7803                 ibm->flags.init_called = 0;
7804         }
7805
7806         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7807 }
7808
7809 static int __init ibm_init(struct ibm_init_struct *iibm)
7810 {
7811         int ret;
7812         struct ibm_struct *ibm = iibm->data;
7813         struct proc_dir_entry *entry;
7814
7815         BUG_ON(ibm == NULL);
7816
7817         INIT_LIST_HEAD(&ibm->all_drivers);
7818
7819         if (ibm->flags.experimental && !experimental)
7820                 return 0;
7821
7822         dbg_printk(TPACPI_DBG_INIT,
7823                 "probing for %s\n", ibm->name);
7824
7825         if (iibm->init) {
7826                 ret = iibm->init(iibm);
7827                 if (ret > 0)
7828                         return 0;       /* probe failed */
7829                 if (ret)
7830                         return ret;
7831
7832                 ibm->flags.init_called = 1;
7833         }
7834
7835         if (ibm->acpi) {
7836                 if (ibm->acpi->hid) {
7837                         ret = register_tpacpi_subdriver(ibm);
7838                         if (ret)
7839                                 goto err_out;
7840                 }
7841
7842                 if (ibm->acpi->notify) {
7843                         ret = setup_acpi_notify(ibm);
7844                         if (ret == -ENODEV) {
7845                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7846                                         ibm->name);
7847                                 ret = 0;
7848                                 goto err_out;
7849                         }
7850                         if (ret < 0)
7851                                 goto err_out;
7852                 }
7853         }
7854
7855         dbg_printk(TPACPI_DBG_INIT,
7856                 "%s installed\n", ibm->name);
7857
7858         if (ibm->read) {
7859                 entry = create_proc_entry(ibm->name,
7860                                           S_IFREG | S_IRUGO | S_IWUSR,
7861                                           proc_dir);
7862                 if (!entry) {
7863                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7864                                ibm->name);
7865                         ret = -ENODEV;
7866                         goto err_out;
7867                 }
7868                 entry->data = ibm;
7869                 entry->read_proc = &dispatch_procfs_read;
7870                 if (ibm->write)
7871                         entry->write_proc = &dispatch_procfs_write;
7872                 ibm->flags.proc_created = 1;
7873         }
7874
7875         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7876
7877         return 0;
7878
7879 err_out:
7880         dbg_printk(TPACPI_DBG_INIT,
7881                 "%s: at error exit path with result %d\n",
7882                 ibm->name, ret);
7883
7884         ibm_exit(ibm);
7885         return (ret < 0)? ret : 0;
7886 }
7887
7888 /* Probing */
7889
7890 static bool __pure __init tpacpi_is_fw_digit(const char c)
7891 {
7892         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7893 }
7894
7895 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7896 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7897                                                 const char t)
7898 {
7899         return s && strlen(s) >= 8 &&
7900                 tpacpi_is_fw_digit(s[0]) &&
7901                 tpacpi_is_fw_digit(s[1]) &&
7902                 s[2] == t && s[3] == 'T' &&
7903                 tpacpi_is_fw_digit(s[4]) &&
7904                 tpacpi_is_fw_digit(s[5]) &&
7905                 s[6] == 'W' && s[7] == 'W';
7906 }
7907
7908 /* returns 0 - probe ok, or < 0 - probe error.
7909  * Probe ok doesn't mean thinkpad found.
7910  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7911 static int __must_check __init get_thinkpad_model_data(
7912                                                 struct thinkpad_id_data *tp)
7913 {
7914         const struct dmi_device *dev = NULL;
7915         char ec_fw_string[18];
7916         char const *s;
7917
7918         if (!tp)
7919                 return -EINVAL;
7920
7921         memset(tp, 0, sizeof(*tp));
7922
7923         if (dmi_name_in_vendors("IBM"))
7924                 tp->vendor = PCI_VENDOR_ID_IBM;
7925         else if (dmi_name_in_vendors("LENOVO"))
7926                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7927         else
7928                 return 0;
7929
7930         s = dmi_get_system_info(DMI_BIOS_VERSION);
7931         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7932         if (s && !tp->bios_version_str)
7933                 return -ENOMEM;
7934
7935         /* Really ancient ThinkPad 240X will fail this, which is fine */
7936         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7937                 return 0;
7938
7939         tp->bios_model = tp->bios_version_str[0]
7940                          | (tp->bios_version_str[1] << 8);
7941         tp->bios_release = (tp->bios_version_str[4] << 8)
7942                          | tp->bios_version_str[5];
7943
7944         /*
7945          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7946          * X32 or newer, all Z series;  Some models must have an
7947          * up-to-date BIOS or they will not be detected.
7948          *
7949          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7950          */
7951         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7952                 if (sscanf(dev->name,
7953                            "IBM ThinkPad Embedded Controller -[%17c",
7954                            ec_fw_string) == 1) {
7955                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7956                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7957
7958                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7959                         if (!tp->ec_version_str)
7960                                 return -ENOMEM;
7961
7962                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7963                                 tp->ec_model = ec_fw_string[0]
7964                                                 | (ec_fw_string[1] << 8);
7965                                 tp->ec_release = (ec_fw_string[4] << 8)
7966                                                 | ec_fw_string[5];
7967                         } else {
7968                                 printk(TPACPI_NOTICE
7969                                         "ThinkPad firmware release %s "
7970                                         "doesn't match the known patterns\n",
7971                                         ec_fw_string);
7972                                 printk(TPACPI_NOTICE
7973                                         "please report this to %s\n",
7974                                         TPACPI_MAIL);
7975                         }
7976                         break;
7977                 }
7978         }
7979
7980         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7981         if (s && !strnicmp(s, "ThinkPad", 8)) {
7982                 tp->model_str = kstrdup(s, GFP_KERNEL);
7983                 if (!tp->model_str)
7984                         return -ENOMEM;
7985         }
7986
7987         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7988         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7989         if (s && !tp->nummodel_str)
7990                 return -ENOMEM;
7991
7992         return 0;
7993 }
7994
7995 static int __init probe_for_thinkpad(void)
7996 {
7997         int is_thinkpad;
7998
7999         if (acpi_disabled)
8000                 return -ENODEV;
8001
8002         /*
8003          * Non-ancient models have better DMI tagging, but very old models
8004          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8005          */
8006         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8007                       (thinkpad_id.ec_model != 0) ||
8008                       tpacpi_is_fw_known();
8009
8010         /* ec is required because many other handles are relative to it */
8011         TPACPI_ACPIHANDLE_INIT(ec);
8012         if (!ec_handle) {
8013                 if (is_thinkpad)
8014                         printk(TPACPI_ERR
8015                                 "Not yet supported ThinkPad detected!\n");
8016                 return -ENODEV;
8017         }
8018
8019         if (!is_thinkpad && !force_load)
8020                 return -ENODEV;
8021
8022         return 0;
8023 }
8024
8025
8026 /* Module init, exit, parameters */
8027
8028 static struct ibm_init_struct ibms_init[] __initdata = {
8029         {
8030                 .init = thinkpad_acpi_driver_init,
8031                 .data = &thinkpad_acpi_driver_data,
8032         },
8033         {
8034                 .init = hotkey_init,
8035                 .data = &hotkey_driver_data,
8036         },
8037         {
8038                 .init = bluetooth_init,
8039                 .data = &bluetooth_driver_data,
8040         },
8041         {
8042                 .init = wan_init,
8043                 .data = &wan_driver_data,
8044         },
8045         {
8046                 .init = uwb_init,
8047                 .data = &uwb_driver_data,
8048         },
8049 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8050         {
8051                 .init = video_init,
8052                 .data = &video_driver_data,
8053         },
8054 #endif
8055         {
8056                 .init = light_init,
8057                 .data = &light_driver_data,
8058         },
8059         {
8060                 .init = cmos_init,
8061                 .data = &cmos_driver_data,
8062         },
8063         {
8064                 .init = led_init,
8065                 .data = &led_driver_data,
8066         },
8067         {
8068                 .init = beep_init,
8069                 .data = &beep_driver_data,
8070         },
8071         {
8072                 .init = thermal_init,
8073                 .data = &thermal_driver_data,
8074         },
8075         {
8076                 .data = &ecdump_driver_data,
8077         },
8078         {
8079                 .init = brightness_init,
8080                 .data = &brightness_driver_data,
8081         },
8082         {
8083                 .data = &volume_driver_data,
8084         },
8085         {
8086                 .init = fan_init,
8087                 .data = &fan_driver_data,
8088         },
8089 };
8090
8091 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8092 {
8093         unsigned int i;
8094         struct ibm_struct *ibm;
8095
8096         if (!kp || !kp->name || !val)
8097                 return -EINVAL;
8098
8099         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8100                 ibm = ibms_init[i].data;
8101                 WARN_ON(ibm == NULL);
8102
8103                 if (!ibm || !ibm->name)
8104                         continue;
8105
8106                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8107                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8108                                 return -ENOSPC;
8109                         strcpy(ibms_init[i].param, val);
8110                         strcat(ibms_init[i].param, ",");
8111                         return 0;
8112                 }
8113         }
8114
8115         return -EINVAL;
8116 }
8117
8118 module_param(experimental, int, 0);
8119 MODULE_PARM_DESC(experimental,
8120                  "Enables experimental features when non-zero");
8121
8122 module_param_named(debug, dbg_level, uint, 0);
8123 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8124
8125 module_param(force_load, bool, 0);
8126 MODULE_PARM_DESC(force_load,
8127                  "Attempts to load the driver even on a "
8128                  "mis-identified ThinkPad when true");
8129
8130 module_param_named(fan_control, fan_control_allowed, bool, 0);
8131 MODULE_PARM_DESC(fan_control,
8132                  "Enables setting fan parameters features when true");
8133
8134 module_param_named(brightness_mode, brightness_mode, uint, 0);
8135 MODULE_PARM_DESC(brightness_mode,
8136                  "Selects brightness control strategy: "
8137                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8138
8139 module_param(brightness_enable, uint, 0);
8140 MODULE_PARM_DESC(brightness_enable,
8141                  "Enables backlight control when 1, disables when 0");
8142
8143 module_param(hotkey_report_mode, uint, 0);
8144 MODULE_PARM_DESC(hotkey_report_mode,
8145                  "used for backwards compatibility with userspace, "
8146                  "see documentation");
8147
8148 #define TPACPI_PARAM(feature) \
8149         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8150         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8151                          "at module load, see documentation")
8152
8153 TPACPI_PARAM(hotkey);
8154 TPACPI_PARAM(bluetooth);
8155 TPACPI_PARAM(video);
8156 TPACPI_PARAM(light);
8157 TPACPI_PARAM(cmos);
8158 TPACPI_PARAM(led);
8159 TPACPI_PARAM(beep);
8160 TPACPI_PARAM(ecdump);
8161 TPACPI_PARAM(brightness);
8162 TPACPI_PARAM(volume);
8163 TPACPI_PARAM(fan);
8164
8165 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8166 module_param(dbg_wlswemul, uint, 0);
8167 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8168 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8169 MODULE_PARM_DESC(wlsw_state,
8170                  "Initial state of the emulated WLSW switch");
8171
8172 module_param(dbg_bluetoothemul, uint, 0);
8173 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8174 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8175 MODULE_PARM_DESC(bluetooth_state,
8176                  "Initial state of the emulated bluetooth switch");
8177
8178 module_param(dbg_wwanemul, uint, 0);
8179 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8180 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8181 MODULE_PARM_DESC(wwan_state,
8182                  "Initial state of the emulated WWAN switch");
8183
8184 module_param(dbg_uwbemul, uint, 0);
8185 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8186 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8187 MODULE_PARM_DESC(uwb_state,
8188                  "Initial state of the emulated UWB switch");
8189 #endif
8190
8191 static void thinkpad_acpi_module_exit(void)
8192 {
8193         struct ibm_struct *ibm, *itmp;
8194
8195         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8196
8197         list_for_each_entry_safe_reverse(ibm, itmp,
8198                                          &tpacpi_all_drivers,
8199                                          all_drivers) {
8200                 ibm_exit(ibm);
8201         }
8202
8203         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8204
8205         if (tpacpi_inputdev) {
8206                 if (tp_features.input_device_registered)
8207                         input_unregister_device(tpacpi_inputdev);
8208                 else
8209                         input_free_device(tpacpi_inputdev);
8210         }
8211
8212         if (tpacpi_hwmon)
8213                 hwmon_device_unregister(tpacpi_hwmon);
8214
8215         if (tp_features.sensors_pdev_attrs_registered)
8216                 device_remove_file(&tpacpi_sensors_pdev->dev,
8217                                    &dev_attr_thinkpad_acpi_pdev_name);
8218         if (tpacpi_sensors_pdev)
8219                 platform_device_unregister(tpacpi_sensors_pdev);
8220         if (tpacpi_pdev)
8221                 platform_device_unregister(tpacpi_pdev);
8222
8223         if (tp_features.sensors_pdrv_attrs_registered)
8224                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8225         if (tp_features.platform_drv_attrs_registered)
8226                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8227
8228         if (tp_features.sensors_pdrv_registered)
8229                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8230
8231         if (tp_features.platform_drv_registered)
8232                 platform_driver_unregister(&tpacpi_pdriver);
8233
8234         if (proc_dir)
8235                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8236
8237         if (tpacpi_wq)
8238                 destroy_workqueue(tpacpi_wq);
8239
8240         kfree(thinkpad_id.bios_version_str);
8241         kfree(thinkpad_id.ec_version_str);
8242         kfree(thinkpad_id.model_str);
8243 }
8244
8245
8246 static int __init thinkpad_acpi_module_init(void)
8247 {
8248         int ret, i;
8249
8250         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8251
8252         /* Parameter checking */
8253         if (hotkey_report_mode > 2)
8254                 return -EINVAL;
8255
8256         /* Driver-level probe */
8257
8258         ret = get_thinkpad_model_data(&thinkpad_id);
8259         if (ret) {
8260                 printk(TPACPI_ERR
8261                         "unable to get DMI data: %d\n", ret);
8262                 thinkpad_acpi_module_exit();
8263                 return ret;
8264         }
8265         ret = probe_for_thinkpad();
8266         if (ret) {
8267                 thinkpad_acpi_module_exit();
8268                 return ret;
8269         }
8270
8271         /* Driver initialization */
8272
8273         TPACPI_ACPIHANDLE_INIT(ecrd);
8274         TPACPI_ACPIHANDLE_INIT(ecwr);
8275
8276         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8277         if (!tpacpi_wq) {
8278                 thinkpad_acpi_module_exit();
8279                 return -ENOMEM;
8280         }
8281
8282         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8283         if (!proc_dir) {
8284                 printk(TPACPI_ERR
8285                        "unable to create proc dir " TPACPI_PROC_DIR);
8286                 thinkpad_acpi_module_exit();
8287                 return -ENODEV;
8288         }
8289
8290         ret = platform_driver_register(&tpacpi_pdriver);
8291         if (ret) {
8292                 printk(TPACPI_ERR
8293                        "unable to register main platform driver\n");
8294                 thinkpad_acpi_module_exit();
8295                 return ret;
8296         }
8297         tp_features.platform_drv_registered = 1;
8298
8299         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8300         if (ret) {
8301                 printk(TPACPI_ERR
8302                        "unable to register hwmon platform driver\n");
8303                 thinkpad_acpi_module_exit();
8304                 return ret;
8305         }
8306         tp_features.sensors_pdrv_registered = 1;
8307
8308         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8309         if (!ret) {
8310                 tp_features.platform_drv_attrs_registered = 1;
8311                 ret = tpacpi_create_driver_attributes(
8312                                         &tpacpi_hwmon_pdriver.driver);
8313         }
8314         if (ret) {
8315                 printk(TPACPI_ERR
8316                        "unable to create sysfs driver attributes\n");
8317                 thinkpad_acpi_module_exit();
8318                 return ret;
8319         }
8320         tp_features.sensors_pdrv_attrs_registered = 1;
8321
8322
8323         /* Device initialization */
8324         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8325                                                         NULL, 0);
8326         if (IS_ERR(tpacpi_pdev)) {
8327                 ret = PTR_ERR(tpacpi_pdev);
8328                 tpacpi_pdev = NULL;
8329                 printk(TPACPI_ERR "unable to register platform device\n");
8330                 thinkpad_acpi_module_exit();
8331                 return ret;
8332         }
8333         tpacpi_sensors_pdev = platform_device_register_simple(
8334                                                 TPACPI_HWMON_DRVR_NAME,
8335                                                 -1, NULL, 0);
8336         if (IS_ERR(tpacpi_sensors_pdev)) {
8337                 ret = PTR_ERR(tpacpi_sensors_pdev);
8338                 tpacpi_sensors_pdev = NULL;
8339                 printk(TPACPI_ERR
8340                        "unable to register hwmon platform device\n");
8341                 thinkpad_acpi_module_exit();
8342                 return ret;
8343         }
8344         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8345                                  &dev_attr_thinkpad_acpi_pdev_name);
8346         if (ret) {
8347                 printk(TPACPI_ERR
8348                        "unable to create sysfs hwmon device attributes\n");
8349                 thinkpad_acpi_module_exit();
8350                 return ret;
8351         }
8352         tp_features.sensors_pdev_attrs_registered = 1;
8353         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8354         if (IS_ERR(tpacpi_hwmon)) {
8355                 ret = PTR_ERR(tpacpi_hwmon);
8356                 tpacpi_hwmon = NULL;
8357                 printk(TPACPI_ERR "unable to register hwmon device\n");
8358                 thinkpad_acpi_module_exit();
8359                 return ret;
8360         }
8361         mutex_init(&tpacpi_inputdev_send_mutex);
8362         tpacpi_inputdev = input_allocate_device();
8363         if (!tpacpi_inputdev) {
8364                 printk(TPACPI_ERR "unable to allocate input device\n");
8365                 thinkpad_acpi_module_exit();
8366                 return -ENOMEM;
8367         } else {
8368                 /* Prepare input device, but don't register */
8369                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8370                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8371                 tpacpi_inputdev->id.bustype = BUS_HOST;
8372                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8373                                                 thinkpad_id.vendor :
8374                                                 PCI_VENDOR_ID_IBM;
8375                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8376                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8377         }
8378         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8379                 ret = ibm_init(&ibms_init[i]);
8380                 if (ret >= 0 && *ibms_init[i].param)
8381                         ret = ibms_init[i].data->write(ibms_init[i].param);
8382                 if (ret < 0) {
8383                         thinkpad_acpi_module_exit();
8384                         return ret;
8385                 }
8386         }
8387         ret = input_register_device(tpacpi_inputdev);
8388         if (ret < 0) {
8389                 printk(TPACPI_ERR "unable to register input device\n");
8390                 thinkpad_acpi_module_exit();
8391                 return ret;
8392         } else {
8393                 tp_features.input_device_registered = 1;
8394         }
8395
8396         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8397         return 0;
8398 }
8399
8400 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8401
8402 /*
8403  * This will autoload the driver in almost every ThinkPad
8404  * in widespread use.
8405  *
8406  * Only _VERY_ old models, like the 240, 240x and 570 lack
8407  * the HKEY event interface.
8408  */
8409 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8410
8411 /*
8412  * DMI matching for module autoloading
8413  *
8414  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8415  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8416  *
8417  * Only models listed in thinkwiki will be supported, so add yours
8418  * if it is not there yet.
8419  */
8420 #define IBM_BIOS_MODULE_ALIAS(__type) \
8421         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8422
8423 /* Ancient thinkpad BIOSes have to be identified by
8424  * BIOS type or model number, and there are far less
8425  * BIOS types than model numbers... */
8426 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8427
8428 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8429 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8430 MODULE_DESCRIPTION(TPACPI_DESC);
8431 MODULE_VERSION(TPACPI_VERSION);
8432 MODULE_LICENSE("GPL");
8433
8434 module_init(thinkpad_acpi_module_init);
8435 module_exit(thinkpad_acpi_module_exit);