drivers/acpi/ibm_acpi.c

   1 /*
   2  *  ibm_acpi.c - IBM ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #define IBM_VERSION "0.13"
  24
  25 /*
  26  *  Changelog:
  27  *
  28  *  2006-11-22  0.13    new maintainer
  29  *                      changelog now lives in git commit history, and will
  30  *                      not be updated further in-file.
  31  *
  32  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  33  *  2005-03-17  0.11    support for 600e, 770x
  34  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  35  *                      support for 770e, G41
  36  *                      G40 and G41 don't have a thinklight
  37  *                      temperatures no longer experimental
  38  *                      experimental brightness control
  39  *                      experimental volume control
  40  *                      experimental fan enable/disable
  41  *  2005-01-16  0.10    fix module loading on R30, R31
  42  *  2005-01-16  0.9     support for 570, R30, R31
  43  *                      ultrabay support on A22p, A3x
  44  *                      limit arg for cmos, led, beep, drop experimental status
  45  *                      more capable led control on A21e, A22p, T20-22, X20
  46  *                      experimental temperatures and fan speed
  47  *                      experimental embedded controller register dump
  48  *                      mark more functions as __init, drop incorrect __exit
  49  *                      use MODULE_VERSION
  50  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  51  *                      fix parameter passing on module loading
  52  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  53  *                          thanks to Jim Radford <radford@blackbean.org>
  54  *  2004-11-08  0.8     fix init error case, don't return from a macro
  55  *                          thanks to Chris Wright <chrisw@osdl.org>
  56  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  57  *                      fix led control on A21e
  58  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  59  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  60  *                      proc file format changed
  61  *                      video_switch command
  62  *                      experimental cmos control
  63  *                      experimental led control
  64  *                      experimental acpi sounds
  65  *  2004-09-16  0.4     support for module parameters
  66  *                      hotkey mask can be prefixed by 0x
  67  *                      video output switching
  68  *                      video expansion control
  69  *                      ultrabay eject support
  70  *                      removed lcd brightness/on/off control, didn't work
  71  *  2004-08-17  0.3     support for R40
  72  *                      lcd off, brightness control
  73  *                      thinklight on/off
  74  *  2004-08-14  0.2     support for T series, X20
  75  *                      bluetooth enable/disable
  76  *                      hotkey events disabled by default
  77  *                      removed fan control, currently useless
  78  *  2004-08-09  0.1     initial release, support for X series
  79  */
  80
  81 #include <linux/kernel.h>
  82 #include <linux/module.h>
  83 #include <linux/init.h>
  84 #include <linux/types.h>
  85 #include <linux/string.h>
  86
  87 #include <linux/proc_fs.h>
  88 #include <linux/backlight.h>
  89 #include <asm/uaccess.h>
  90
  91 #include <linux/dmi.h>
  92 #include <linux/jiffies.h>
  93 #include <linux/workqueue.h>
  94
  95 #include <acpi/acpi_drivers.h>
  96 #include <acpi/acnamesp.h>
  97
  98 #define IBM_NAME "ibm"
  99 #define IBM_DESC "IBM ThinkPad ACPI Extras"
 100 #define IBM_FILE "ibm_acpi"
 101 #define IBM_URL "http://ibm-acpi.sf.net/"
 102
 103 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
 104 MODULE_DESCRIPTION(IBM_DESC);
 105 MODULE_VERSION(IBM_VERSION);
 106 MODULE_LICENSE("GPL");
 107
 108 #define IBM_DIR IBM_NAME
 109
 110 #define IBM_LOG IBM_FILE ": "
 111 #define IBM_ERR    KERN_ERR    IBM_LOG
 112 #define IBM_NOTICE KERN_NOTICE IBM_LOG
 113 #define IBM_INFO   KERN_INFO   IBM_LOG
 114 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
 115
 116 #define IBM_MAX_ACPI_ARGS 3
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 static int experimental;
 121 module_param(experimental, int, 0);
 122
 123 static acpi_handle root_handle = NULL;
 124
 125 #define IBM_HANDLE(object, parent, paths...)                    \
 126         static acpi_handle  object##_handle;                    \
 127         static acpi_handle *object##_parent = &parent##_handle; \
 128         static char        *object##_path;                      \
 129         static char        *object##_paths[] = { paths }
 130
 131 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 132            "\\_SB.PCI.ISA.EC",  /* 570 */
 133            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 134            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 135            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 136            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 137            "\\_SB.PCI0.LPC.EC", /* all others */
 138     );
 139
 140 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 141            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 142            "\\_SB.PCI0.VID0",   /* 770e */
 143            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 144            "\\_SB.PCI0.AGP.VID",        /* all others */
 145     );                          /* R30, R31 */
 146
 147 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 148
 149 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 150            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 151            "\\CMS",             /* R40, R40e */
 152     );                          /* all others */
 153 #ifdef CONFIG_ACPI_IBM_DOCK
 154 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
 155            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
 156            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
 157            "\\_SB.PCI.ISA.SLCE",        /* 570 */
 158     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
 159 #endif
 160 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
 161            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
 162            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
 163            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
 164     );                          /* A21e, R30, R31 */
 165
 166 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
 167            "_EJ0",              /* all others */
 168     );                          /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
 169
 170 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
 171            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
 172     );                          /* all others */
 173
 174 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
 175            "_EJ0",              /* 770x */
 176     );                          /* all others */
 177
 178 /* don't list other alternatives as we install a notify handler on the 570 */
 179 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
 180
 181 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 182            "^HKEY",             /* R30, R31 */
 183            "HKEY",              /* all others */
 184     );                          /* 570 */
 185
 186 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
 187 IBM_HANDLE(ledb, ec, "LEDB");   /* G4x */
 188
 189 IBM_HANDLE(led, ec, "SLED",     /* 570 */
 190            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 191            "LED",               /* all others */
 192     );                          /* R30, R31 */
 193
 194 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
 195 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 196 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 197 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
 198
 199 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
 200            "\\FSPD",            /* 600e/x, 770e, 770x */
 201     );                          /* all others */
 202
 203 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
 204            "JFNS",              /* 770x-JL */
 205     );                          /* all others */
 206
 207 #define IBM_HKEY_HID    "IBM0068"
 208 #define IBM_PCI_HID     "PNP0A03"
 209
 210 enum thermal_access_mode {
 211         IBMACPI_THERMAL_NONE = 0,       /* No thermal support */
 212         IBMACPI_THERMAL_ACPI_TMP07,     /* Use ACPI TMP0-7 */
 213         IBMACPI_THERMAL_ACPI_UPDT,      /* Use ACPI TMP0-7 with UPDT */
 214         IBMACPI_THERMAL_TPEC_8,         /* Use ACPI EC regs, 8 sensors */
 215         IBMACPI_THERMAL_TPEC_16,        /* Use ACPI EC regs, 16 sensors */
 216 };
 217
 218 #define IBMACPI_MAX_THERMAL_SENSORS 16  /* Max thermal sensors supported */
 219 struct ibm_thermal_sensors_struct {
 220         s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
 221 };
 222
 223 /*
 224  * FAN ACCESS MODES
 225  *
 226  * IBMACPI_FAN_RD_ACPI_GFAN:
 227  *      ACPI GFAN method: returns fan level
 228  *
 229  *      see IBMACPI_FAN_WR_ACPI_SFAN
 230  *      EC 0x2f not available if GFAN exists
 231  *
 232  * IBMACPI_FAN_WR_ACPI_SFAN:
 233  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
 234  *
 235  *      EC 0x2f might be available *for reading*, but never for writing.
 236  *
 237  * IBMACPI_FAN_WR_TPEC:
 238  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
 239  *      on almost all ThinkPads
 240  *
 241  *      Fan speed changes of any sort (including those caused by the
 242  *      disengaged mode) are usually done slowly by the firmware as the
 243  *      maximum ammount of fan duty cycle change per second seems to be
 244  *      limited.
 245  *
 246  *      Reading is not available if GFAN exists.
 247  *      Writing is not available if SFAN exists.
 248  *
 249  *      Bits
 250  *       7      automatic mode engaged;
 251  *              (default operation mode of the ThinkPad)
 252  *              fan level is ignored in this mode.
 253  *       6      disengage mode (takes precedence over bit 7);
 254  *              not available on all thinkpads.  May disable
 255  *              the tachometer, and speeds up fan to 100% duty-cycle,
 256  *              which speeds it up far above the standard RPM
 257  *              levels.  It is not impossible that it could cause
 258  *              hardware damage.
 259  *      5-3     unused in some models.  Extra bits for fan level
 260  *              in others, but still useless as all values above
 261  *              7 map to the same speed as level 7 in these models.
 262  *      2-0     fan level (0..7 usually)
 263  *                      0x00 = stop
 264  *                      0x07 = max (set when temperatures critical)
 265  *              Some ThinkPads may have other levels, see
 266  *              IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
 267  *
 268  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
 269  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
 270  *      does so, its initial value is meaningless (0x07).
 271  *
 272  *      For firmware bugs, refer to:
 273  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 274  *
 275  *      ----
 276  *
 277  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
 278  *      Main fan tachometer reading (in RPM)
 279  *
 280  *      This register is present on all ThinkPads with a new-style EC, and
 281  *      it is known not to be present on the A21m/e, and T22, as there is
 282  *      something else in offset 0x84 according to the ACPI DSDT.  Other
 283  *      ThinkPads from this same time period (and earlier) probably lack the
 284  *      tachometer as well.
 285  *
 286  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
 287  *      was never fixed by IBM to report the EC firmware version string
 288  *      probably support the tachometer (like the early X models), so
 289  *      detecting it is quite hard.  We need more data to know for sure.
 290  *
 291  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
 292  *      might result.
 293  *
 294  *      FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
 295  *      register is not invalidated in ThinkPads that disable tachometer
 296  *      readings.  Thus, the tachometer readings go stale.
 297  *
 298  *      For firmware bugs, refer to:
 299  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 300  *
 301  * IBMACPI_FAN_WR_ACPI_FANS:
 302  *      ThinkPad X31, X40, X41.  Not available in the X60.
 303  *
 304  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
 305  *      high speed.  ACPI DSDT seems to map these three speeds to levels
 306  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
 307  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
 308  *
 309  *      The speeds are stored on handles
 310  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
 311  *
 312  *      There are three default speed sets, acessible as handles:
 313  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
 314  *
 315  *      ACPI DSDT switches which set is in use depending on various
 316  *      factors.
 317  *
 318  *      IBMACPI_FAN_WR_TPEC is also available and should be used to
 319  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
 320  *      but the ACPI tables just mention level 7.
 321  */
 322
 323 enum fan_status_access_mode {
 324         IBMACPI_FAN_NONE = 0,           /* No fan status or control */
 325         IBMACPI_FAN_RD_ACPI_GFAN,       /* Use ACPI GFAN */
 326         IBMACPI_FAN_RD_TPEC,            /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 327 };
 328
 329 enum fan_control_access_mode {
 330         IBMACPI_FAN_WR_NONE = 0,        /* No fan control */
 331         IBMACPI_FAN_WR_ACPI_SFAN,       /* Use ACPI SFAN */
 332         IBMACPI_FAN_WR_TPEC,            /* Use ACPI EC reg 0x2f */
 333         IBMACPI_FAN_WR_ACPI_FANS,       /* Use ACPI FANS and EC reg 0x2f */
 334 };
 335
 336 enum fan_control_commands {
 337         IBMACPI_FAN_CMD_SPEED   = 0x0001,       /* speed command */
 338         IBMACPI_FAN_CMD_LEVEL   = 0x0002,       /* level command  */
 339         IBMACPI_FAN_CMD_ENABLE  = 0x0004,       /* enable/disable cmd,
 340                                                  * and also watchdog cmd */
 341 };
 342
 343 enum {                                  /* Fan control constants */
 344         fan_status_offset = 0x2f,       /* EC register 0x2f */
 345         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 346                                          * 0x84 must be read before 0x85 */
 347
 348         IBMACPI_FAN_EC_DISENGAGED       = 0x40, /* EC mode: tachometer
 349                                                  * disengaged */
 350         IBMACPI_FAN_EC_AUTO             = 0x80, /* EC mode: auto fan
 351                                                  * control */
 352 };
 353
 354 static char *ibm_thinkpad_ec_found = NULL;
 355
 356 struct ibm_struct {
 357         char *name;
 358         char param[32];
 359
 360         char *hid;
 361         struct acpi_driver *driver;
 362
 363         int (*init) (void);
 364         int (*read) (char *);
 365         int (*write) (char *);
 366         void (*exit) (void);
 367
 368         void (*notify) (struct ibm_struct *, u32);
 369         acpi_handle *handle;
 370         int type;
 371         struct acpi_device *device;
 372
 373         int driver_registered;
 374         int proc_created;
 375         int init_called;
 376         int notify_installed;
 377
 378         int experimental;
 379 };
 380
 381 static struct proc_dir_entry *proc_dir = NULL;
 382
 383 static struct backlight_device *ibm_backlight_device = NULL;
 384
 385 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
 386 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 387 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
 388
 389 static int acpi_evalf(acpi_handle handle,
 390                       void *res, char *method, char *fmt, ...)
 391 {
 392         char *fmt0 = fmt;
 393         struct acpi_object_list params;
 394         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 395         struct acpi_buffer result, *resultp;
 396         union acpi_object out_obj;
 397         acpi_status status;
 398         va_list ap;
 399         char res_type;
 400         int success;
 401         int quiet;
 402
 403         if (!*fmt) {
 404                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 405                 return 0;
 406         }
 407
 408         if (*fmt == 'q') {
 409                 quiet = 1;
 410                 fmt++;
 411         } else
 412                 quiet = 0;
 413
 414         res_type = *(fmt++);
 415
 416         params.count = 0;
 417         params.pointer = &in_objs[0];
 418
 419         va_start(ap, fmt);
 420         while (*fmt) {
 421                 char c = *(fmt++);
 422                 switch (c) {
 423                 case 'd':       /* int */
 424                         in_objs[params.count].integer.value = va_arg(ap, int);
 425                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 426                         break;
 427                         /* add more types as needed */
 428                 default:
 429                         printk(IBM_ERR "acpi_evalf() called "
 430                                "with invalid format character '%c'\n", c);
 431                         return 0;
 432                 }
 433         }
 434         va_end(ap);
 435
 436         if (res_type != 'v') {
 437                 result.length = sizeof(out_obj);
 438                 result.pointer = &out_obj;
 439                 resultp = &result;
 440         } else
 441                 resultp = NULL;
 442
 443         status = acpi_evaluate_object(handle, method, &params, resultp);
 444
 445         switch (res_type) {
 446         case 'd':               /* int */
 447                 if (res)
 448                         *(int *)res = out_obj.integer.value;
 449                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 450                 break;
 451         case 'v':               /* void */
 452                 success = status == AE_OK;
 453                 break;
 454                 /* add more types as needed */
 455         default:
 456                 printk(IBM_ERR "acpi_evalf() called "
 457                        "with invalid format character '%c'\n", res_type);
 458                 return 0;
 459         }
 460
 461         if (!success && !quiet)
 462                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 463                        method, fmt0, status);
 464
 465         return success;
 466 }
 467
 468 static void __unused acpi_print_int(acpi_handle handle, char *method)
 469 {
 470         int i;
 471
 472         if (acpi_evalf(handle, &i, method, "d"))
 473                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 474         else
 475                 printk(IBM_ERR "error calling %s\n", method);
 476 }
 477
 478 static char *next_cmd(char **cmds)
 479 {
 480         char *start = *cmds;
 481         char *end;
 482
 483         while ((end = strchr(start, ',')) && end == start)
 484                 start = end + 1;
 485
 486         if (!end)
 487                 return NULL;
 488
 489         *end = 0;
 490         *cmds = end + 1;
 491         return start;
 492 }
 493
 494 static int ibm_acpi_driver_init(void)
 495 {
 496         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 497         printk(IBM_INFO "%s\n", IBM_URL);
 498
 499         return 0;
 500 }
 501
 502 static int driver_read(char *p)
 503 {
 504         int len = 0;
 505
 506         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 507         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 508
 509         return len;
 510 }
 511
 512 static int hotkey_supported;
 513 static int hotkey_mask_supported;
 514 static int hotkey_orig_status;
 515 static int hotkey_orig_mask;
 516
 517 static int hotkey_get(int *status, int *mask)
 518 {
 519         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 520                 return 0;
 521
 522         if (hotkey_mask_supported)
 523                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 524                         return 0;
 525
 526         return 1;
 527 }
 528
 529 static int hotkey_set(int status, int mask)
 530 {
 531         int i;
 532
 533         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 534                 return 0;
 535
 536         if (hotkey_mask_supported)
 537                 for (i = 0; i < 32; i++) {
 538                         int bit = ((1 << i) & mask) != 0;
 539                         if (!acpi_evalf(hkey_handle,
 540                                         NULL, "MHKM", "vdd", i + 1, bit))
 541                                 return 0;
 542                 }
 543
 544         return 1;
 545 }
 546
 547 static int hotkey_init(void)
 548 {
 549         /* hotkey not supported on 570 */
 550         hotkey_supported = hkey_handle != NULL;
 551
 552         if (hotkey_supported) {
 553                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 554                    A30, R30, R31, T20-22, X20-21, X22-24 */
 555                 hotkey_mask_supported =
 556                     acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 557
 558                 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
 559                         return -ENODEV;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static int hotkey_read(char *p)
 566 {
 567         int status, mask;
 568         int len = 0;
 569
 570         if (!hotkey_supported) {
 571                 len += sprintf(p + len, "status:\t\tnot supported\n");
 572                 return len;
 573         }
 574
 575         if (!hotkey_get(&status, &mask))
 576                 return -EIO;
 577
 578         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 579         if (hotkey_mask_supported) {
 580                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 581                 len += sprintf(p + len,
 582                                "commands:\tenable, disable, reset, <mask>\n");
 583         } else {
 584                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 585                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 586         }
 587
 588         return len;
 589 }
 590
 591 static int hotkey_write(char *buf)
 592 {
 593         int status, mask;
 594         char *cmd;
 595         int do_cmd = 0;
 596
 597         if (!hotkey_supported)
 598                 return -ENODEV;
 599
 600         if (!hotkey_get(&status, &mask))
 601                 return -EIO;
 602
 603         while ((cmd = next_cmd(&buf))) {
 604                 if (strlencmp(cmd, "enable") == 0) {
 605                         status = 1;
 606                 } else if (strlencmp(cmd, "disable") == 0) {
 607                         status = 0;
 608                 } else if (strlencmp(cmd, "reset") == 0) {
 609                         status = hotkey_orig_status;
 610                         mask = hotkey_orig_mask;
 611                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 612                         /* mask set */
 613                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 614                         /* mask set */
 615                 } else
 616                         return -EINVAL;
 617                 do_cmd = 1;
 618         }
 619
 620         if (do_cmd && !hotkey_set(status, mask))
 621                 return -EIO;
 622
 623         return 0;
 624 }
 625
 626 static void hotkey_exit(void)
 627 {
 628         if (hotkey_supported)
 629                 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 630 }
 631
 632 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 633 {
 634         int hkey;
 635
 636         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 637                 acpi_bus_generate_event(ibm->device, event, hkey);
 638         else {
 639                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 640                 acpi_bus_generate_event(ibm->device, event, 0);
 641         }
 642 }
 643
 644 static int bluetooth_supported;
 645
 646 static int bluetooth_init(void)
 647 {
 648         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 649            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 650         bluetooth_supported = hkey_handle &&
 651             acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
 652
 653         return 0;
 654 }
 655
 656 static int bluetooth_status(void)
 657 {
 658         int status;
 659
 660         if (!bluetooth_supported ||
 661             !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 662                 status = 0;
 663
 664         return status;
 665 }
 666
 667 static int bluetooth_read(char *p)
 668 {
 669         int len = 0;
 670         int status = bluetooth_status();
 671
 672         if (!bluetooth_supported)
 673                 len += sprintf(p + len, "status:\t\tnot supported\n");
 674         else if (!(status & 1))
 675                 len += sprintf(p + len, "status:\t\tnot installed\n");
 676         else {
 677                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 678                 len += sprintf(p + len, "commands:\tenable, disable\n");
 679         }
 680
 681         return len;
 682 }
 683
 684 static int bluetooth_write(char *buf)
 685 {
 686         int status = bluetooth_status();
 687         char *cmd;
 688         int do_cmd = 0;
 689
 690         if (!bluetooth_supported)
 691                 return -ENODEV;
 692
 693         while ((cmd = next_cmd(&buf))) {
 694                 if (strlencmp(cmd, "enable") == 0) {
 695                         status |= 2;
 696                 } else if (strlencmp(cmd, "disable") == 0) {
 697                         status &= ~2;
 698                 } else
 699                         return -EINVAL;
 700                 do_cmd = 1;
 701         }
 702
 703         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 704                 return -EIO;
 705
 706         return 0;
 707 }
 708
 709 static int wan_supported;
 710
 711 static int wan_init(void)
 712 {
 713         wan_supported = hkey_handle &&
 714             acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
 715
 716         return 0;
 717 }
 718
 719 static int wan_status(void)
 720 {
 721         int status;
 722
 723         if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 724                 status = 0;
 725
 726         return status;
 727 }
 728
 729 static int wan_read(char *p)
 730 {
 731         int len = 0;
 732         int status = wan_status();
 733
 734         if (!wan_supported)
 735                 len += sprintf(p + len, "status:\t\tnot supported\n");
 736         else if (!(status & 1))
 737                 len += sprintf(p + len, "status:\t\tnot installed\n");
 738         else {
 739                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 740                 len += sprintf(p + len, "commands:\tenable, disable\n");
 741         }
 742
 743         return len;
 744 }
 745
 746 static int wan_write(char *buf)
 747 {
 748         int status = wan_status();
 749         char *cmd;
 750         int do_cmd = 0;
 751
 752         if (!wan_supported)
 753                 return -ENODEV;
 754
 755         while ((cmd = next_cmd(&buf))) {
 756                 if (strlencmp(cmd, "enable") == 0) {
 757                         status |= 2;
 758                 } else if (strlencmp(cmd, "disable") == 0) {
 759                         status &= ~2;
 760                 } else
 761                         return -EINVAL;
 762                 do_cmd = 1;
 763         }
 764
 765         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
 766                 return -EIO;
 767
 768         return 0;
 769 }
 770
 771 enum video_access_mode {
 772         IBMACPI_VIDEO_NONE = 0,
 773         IBMACPI_VIDEO_570,      /* 570 */
 774         IBMACPI_VIDEO_770,      /* 600e/x, 770e, 770x */
 775         IBMACPI_VIDEO_NEW,      /* all others */
 776 };
 777
 778 static enum video_access_mode video_supported;
 779 static int video_orig_autosw;
 780
 781 static int video_init(void)
 782 {
 783         int ivga;
 784
 785         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 786                 /* G41, assume IVGA doesn't change */
 787                 vid_handle = vid2_handle;
 788
 789         if (!vid_handle)
 790                 /* video switching not supported on R30, R31 */
 791                 video_supported = IBMACPI_VIDEO_NONE;
 792         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 793                 /* 570 */
 794                 video_supported = IBMACPI_VIDEO_570;
 795         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 796                 /* 600e/x, 770e, 770x */
 797                 video_supported = IBMACPI_VIDEO_770;
 798         else
 799                 /* all others */
 800                 video_supported = IBMACPI_VIDEO_NEW;
 801
 802         return 0;
 803 }
 804
 805 static int video_status(void)
 806 {
 807         int status = 0;
 808         int i;
 809
 810         if (video_supported == IBMACPI_VIDEO_570) {
 811                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
 812                         status = i & 3;
 813         } else if (video_supported == IBMACPI_VIDEO_770) {
 814                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 815                         status |= 0x01 * i;
 816                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 817                         status |= 0x02 * i;
 818         } else if (video_supported == IBMACPI_VIDEO_NEW) {
 819                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
 820                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 821                         status |= 0x02 * i;
 822
 823                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
 824                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 825                         status |= 0x01 * i;
 826                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
 827                         status |= 0x08 * i;
 828         }
 829
 830         return status;
 831 }
 832
 833 static int video_autosw(void)
 834 {
 835         int autosw = 0;
 836
 837         if (video_supported == IBMACPI_VIDEO_570)
 838                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
 839         else if (video_supported == IBMACPI_VIDEO_770 ||
 840                  video_supported == IBMACPI_VIDEO_NEW)
 841                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
 842
 843         return autosw & 1;
 844 }
 845
 846 static int video_read(char *p)
 847 {
 848         int status = video_status();
 849         int autosw = video_autosw();
 850         int len = 0;
 851
 852         if (!video_supported) {
 853                 len += sprintf(p + len, "status:\t\tnot supported\n");
 854                 return len;
 855         }
 856
 857         len += sprintf(p + len, "status:\t\tsupported\n");
 858         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
 859         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
 860         if (video_supported == IBMACPI_VIDEO_NEW)
 861                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
 862         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
 863         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
 864         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
 865         if (video_supported == IBMACPI_VIDEO_NEW)
 866                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
 867         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
 868         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
 869
 870         return len;
 871 }
 872
 873 static int video_switch(void)
 874 {
 875         int autosw = video_autosw();
 876         int ret;
 877
 878         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 879                 return -EIO;
 880         ret = video_supported == IBMACPI_VIDEO_570 ?
 881             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
 882             acpi_evalf(vid_handle, NULL, "VSWT", "v");
 883         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 884
 885         return ret;
 886 }
 887
 888 static int video_expand(void)
 889 {
 890         if (video_supported == IBMACPI_VIDEO_570)
 891                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
 892         else if (video_supported == IBMACPI_VIDEO_770)
 893                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
 894         else
 895                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
 896 }
 897
 898 static int video_switch2(int status)
 899 {
 900         int ret;
 901
 902         if (video_supported == IBMACPI_VIDEO_570) {
 903                 ret = acpi_evalf(NULL, NULL,
 904                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
 905         } else if (video_supported == IBMACPI_VIDEO_770) {
 906                 int autosw = video_autosw();
 907                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 908                         return -EIO;
 909
 910                 ret = acpi_evalf(vid_handle, NULL,
 911                                  "ASWT", "vdd", status * 0x100, 0);
 912
 913                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 914         } else {
 915                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
 916                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
 917         }
 918
 919         return ret;
 920 }
 921
 922 static int video_write(char *buf)
 923 {
 924         char *cmd;
 925         int enable, disable, status;
 926
 927         if (!video_supported)
 928                 return -ENODEV;
 929
 930         enable = disable = 0;
 931
 932         while ((cmd = next_cmd(&buf))) {
 933                 if (strlencmp(cmd, "lcd_enable") == 0) {
 934                         enable |= 0x01;
 935                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
 936                         disable |= 0x01;
 937                 } else if (strlencmp(cmd, "crt_enable") == 0) {
 938                         enable |= 0x02;
 939                 } else if (strlencmp(cmd, "crt_disable") == 0) {
 940                         disable |= 0x02;
 941                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 942                            strlencmp(cmd, "dvi_enable") == 0) {
 943                         enable |= 0x08;
 944                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 945                            strlencmp(cmd, "dvi_disable") == 0) {
 946                         disable |= 0x08;
 947                 } else if (strlencmp(cmd, "auto_enable") == 0) {
 948                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 949                                 return -EIO;
 950                 } else if (strlencmp(cmd, "auto_disable") == 0) {
 951                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
 952                                 return -EIO;
 953                 } else if (strlencmp(cmd, "video_switch") == 0) {
 954                         if (!video_switch())
 955                                 return -EIO;
 956                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
 957                         if (!video_expand())
 958                                 return -EIO;
 959                 } else
 960                         return -EINVAL;
 961         }
 962
 963         if (enable || disable) {
 964                 status = (video_status() & 0x0f & ~disable) | enable;
 965                 if (!video_switch2(status))
 966                         return -EIO;
 967         }
 968
 969         return 0;
 970 }
 971
 972 static void video_exit(void)
 973 {
 974         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
 975 }
 976
 977 static int light_supported;
 978 static int light_status_supported;
 979
 980 static int light_init(void)
 981 {
 982         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
 983         light_supported = (cmos_handle || lght_handle) && !ledb_handle;
 984
 985         if (light_supported)
 986                 /* light status not supported on
 987                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
 988                 light_status_supported = acpi_evalf(ec_handle, NULL,
 989                                                     "KBLT", "qv");
 990
 991         return 0;
 992 }
 993
 994 static int light_read(char *p)
 995 {
 996         int len = 0;
 997         int status = 0;
 998
 999         if (!light_supported) {
1000                 len += sprintf(p + len, "status:\t\tnot supported\n");
1001         } else if (!light_status_supported) {
1002                 len += sprintf(p + len, "status:\t\tunknown\n");
1003                 len += sprintf(p + len, "commands:\ton, off\n");
1004         } else {
1005                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1006                         return -EIO;
1007                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1008                 len += sprintf(p + len, "commands:\ton, off\n");
1009         }
1010
1011         return len;
1012 }
1013
1014 static int light_write(char *buf)
1015 {
1016         int cmos_cmd, lght_cmd;
1017         char *cmd;
1018         int success;
1019
1020         if (!light_supported)
1021                 return -ENODEV;
1022
1023         while ((cmd = next_cmd(&buf))) {
1024                 if (strlencmp(cmd, "on") == 0) {
1025                         cmos_cmd = 0x0c;
1026                         lght_cmd = 1;
1027                 } else if (strlencmp(cmd, "off") == 0) {
1028                         cmos_cmd = 0x0d;
1029                         lght_cmd = 0;
1030                 } else
1031                         return -EINVAL;
1032
1033                 success = cmos_handle ?
1034                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1035                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1036                 if (!success)
1037                         return -EIO;
1038         }
1039
1040         return 0;
1041 }
1042
1043 static int _sta(acpi_handle handle)
1044 {
1045         int status;
1046
1047         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1048                 status = 0;
1049
1050         return status;
1051 }
1052
1053 #ifdef CONFIG_ACPI_IBM_DOCK
1054 #define dock_docked() (_sta(dock_handle) & 1)
1055
1056 static int dock_read(char *p)
1057 {
1058         int len = 0;
1059         int docked = dock_docked();
1060
1061         if (!dock_handle)
1062                 len += sprintf(p + len, "status:\t\tnot supported\n");
1063         else if (!docked)
1064                 len += sprintf(p + len, "status:\t\tundocked\n");
1065         else {
1066                 len += sprintf(p + len, "status:\t\tdocked\n");
1067                 len += sprintf(p + len, "commands:\tdock, undock\n");
1068         }
1069
1070         return len;
1071 }
1072
1073 static int dock_write(char *buf)
1074 {
1075         char *cmd;
1076
1077         if (!dock_docked())
1078                 return -ENODEV;
1079
1080         while ((cmd = next_cmd(&buf))) {
1081                 if (strlencmp(cmd, "undock") == 0) {
1082                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1083                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1084                                 return -EIO;
1085                 } else if (strlencmp(cmd, "dock") == 0) {
1086                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1087                                 return -EIO;
1088                 } else
1089                         return -EINVAL;
1090         }
1091
1092         return 0;
1093 }
1094
1095 static void dock_notify(struct ibm_struct *ibm, u32 event)
1096 {
1097         int docked = dock_docked();
1098         int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1099
1100         if (event == 1 && !pci) /* 570 */
1101                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1102         else if (event == 1 && pci)     /* 570 */
1103                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1104         else if (event == 3 && docked)
1105                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1106         else if (event == 3 && !docked)
1107                 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1108         else if (event == 0 && docked)
1109                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1110         else {
1111                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1112                        event, _sta(dock_handle));
1113                 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1114         }
1115 }
1116 #endif
1117
1118 static int bay_status_supported;
1119 static int bay_status2_supported;
1120 static int bay_eject_supported;
1121 static int bay_eject2_supported;
1122
1123 static int bay_init(void)
1124 {
1125         bay_status_supported = bay_handle &&
1126             acpi_evalf(bay_handle, NULL, "_STA", "qv");
1127         bay_status2_supported = bay2_handle &&
1128             acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1129
1130         bay_eject_supported = bay_handle && bay_ej_handle &&
1131             (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1132         bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1133             (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1134
1135         return 0;
1136 }
1137
1138 #define bay_occupied(b) (_sta(b##_handle) & 1)
1139
1140 static int bay_read(char *p)
1141 {
1142         int len = 0;
1143         int occupied = bay_occupied(bay);
1144         int occupied2 = bay_occupied(bay2);
1145         int eject, eject2;
1146
1147         len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1148                        (occupied ? "occupied" : "unoccupied") :
1149                        "not supported");
1150         if (bay_status2_supported)
1151                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1152                                "occupied" : "unoccupied");
1153
1154         eject = bay_eject_supported && occupied;
1155         eject2 = bay_eject2_supported && occupied2;
1156
1157         if (eject && eject2)
1158                 len += sprintf(p + len, "commands:\teject, eject2\n");
1159         else if (eject)
1160                 len += sprintf(p + len, "commands:\teject\n");
1161         else if (eject2)
1162                 len += sprintf(p + len, "commands:\teject2\n");
1163
1164         return len;
1165 }
1166
1167 static int bay_write(char *buf)
1168 {
1169         char *cmd;
1170
1171         if (!bay_eject_supported && !bay_eject2_supported)
1172                 return -ENODEV;
1173
1174         while ((cmd = next_cmd(&buf))) {
1175                 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1176                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1177                                 return -EIO;
1178                 } else if (bay_eject2_supported &&
1179                            strlencmp(cmd, "eject2") == 0) {
1180                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1181                                 return -EIO;
1182                 } else
1183                         return -EINVAL;
1184         }
1185
1186         return 0;
1187 }
1188
1189 static void bay_notify(struct ibm_struct *ibm, u32 event)
1190 {
1191         acpi_bus_generate_event(ibm->device, event, 0);
1192 }
1193
1194 static int cmos_read(char *p)
1195 {
1196         int len = 0;
1197
1198         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1199            R30, R31, T20-22, X20-21 */
1200         if (!cmos_handle)
1201                 len += sprintf(p + len, "status:\t\tnot supported\n");
1202         else {
1203                 len += sprintf(p + len, "status:\t\tsupported\n");
1204                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1205         }
1206
1207         return len;
1208 }
1209
1210 static int cmos_eval(int cmos_cmd)
1211 {
1212         if (cmos_handle)
1213                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1214         else
1215                 return 1;
1216 }
1217
1218 static int cmos_write(char *buf)
1219 {
1220         char *cmd;
1221         int cmos_cmd;
1222
1223         if (!cmos_handle)
1224                 return -EINVAL;
1225
1226         while ((cmd = next_cmd(&buf))) {
1227                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1228                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1229                         /* cmos_cmd set */
1230                 } else
1231                         return -EINVAL;
1232
1233                 if (!cmos_eval(cmos_cmd))
1234                         return -EIO;
1235         }
1236
1237         return 0;
1238 }
1239
1240 enum led_access_mode {
1241         IBMACPI_LED_NONE = 0,
1242         IBMACPI_LED_570,        /* 570 */
1243         IBMACPI_LED_OLD,        /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1244         IBMACPI_LED_NEW,        /* all others */
1245 };
1246 static enum led_access_mode led_supported;
1247
1248 static int led_init(void)
1249 {
1250         if (!led_handle)
1251                 /* led not supported on R30, R31 */
1252                 led_supported = IBMACPI_LED_NONE;
1253         else if (strlencmp(led_path, "SLED") == 0)
1254                 /* 570 */
1255                 led_supported = IBMACPI_LED_570;
1256         else if (strlencmp(led_path, "SYSL") == 0)
1257                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1258                 led_supported = IBMACPI_LED_OLD;
1259         else
1260                 /* all others */
1261                 led_supported = IBMACPI_LED_NEW;
1262
1263         return 0;
1264 }
1265
1266 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1267
1268 static int led_read(char *p)
1269 {
1270         int len = 0;
1271
1272         if (!led_supported) {
1273                 len += sprintf(p + len, "status:\t\tnot supported\n");
1274                 return len;
1275         }
1276         len += sprintf(p + len, "status:\t\tsupported\n");
1277
1278         if (led_supported == IBMACPI_LED_570) {
1279                 /* 570 */
1280                 int i, status;
1281                 for (i = 0; i < 8; i++) {
1282                         if (!acpi_evalf(ec_handle,
1283                                         &status, "GLED", "dd", 1 << i))
1284                                 return -EIO;
1285                         len += sprintf(p + len, "%d:\t\t%s\n",
1286                                        i, led_status(status));
1287                 }
1288         }
1289
1290         len += sprintf(p + len, "commands:\t"
1291                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1292
1293         return len;
1294 }
1295
1296 /* off, on, blink */
1297 static const int led_sled_arg1[] = { 0, 1, 3 };
1298 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1299 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1300 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1301
1302 #define EC_HLCL 0x0c
1303 #define EC_HLBL 0x0d
1304 #define EC_HLMS 0x0e
1305
1306 static int led_write(char *buf)
1307 {
1308         char *cmd;
1309         int led, ind, ret;
1310
1311         if (!led_supported)
1312                 return -ENODEV;
1313
1314         while ((cmd = next_cmd(&buf))) {
1315                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1316                         return -EINVAL;
1317
1318                 if (strstr(cmd, "off")) {
1319                         ind = 0;
1320                 } else if (strstr(cmd, "on")) {
1321                         ind = 1;
1322                 } else if (strstr(cmd, "blink")) {
1323                         ind = 2;
1324                 } else
1325                         return -EINVAL;
1326
1327                 if (led_supported == IBMACPI_LED_570) {
1328                         /* 570 */
1329                         led = 1 << led;
1330                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1331                                         led, led_sled_arg1[ind]))
1332                                 return -EIO;
1333                 } else if (led_supported == IBMACPI_LED_OLD) {
1334                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1335                         led = 1 << led;
1336                         ret = ec_write(EC_HLMS, led);
1337                         if (ret >= 0)
1338                                 ret =
1339                                     ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1340                         if (ret >= 0)
1341                                 ret =
1342                                     ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1343                         if (ret < 0)
1344                                 return ret;
1345                 } else {
1346                         /* all others */
1347                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1348                                         led, led_led_arg1[ind]))
1349                                 return -EIO;
1350                 }
1351         }
1352
1353         return 0;
1354 }
1355
1356 static int beep_read(char *p)
1357 {
1358         int len = 0;
1359
1360         if (!beep_handle)
1361                 len += sprintf(p + len, "status:\t\tnot supported\n");
1362         else {
1363                 len += sprintf(p + len, "status:\t\tsupported\n");
1364                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1365         }
1366
1367         return len;
1368 }
1369
1370 static int beep_write(char *buf)
1371 {
1372         char *cmd;
1373         int beep_cmd;
1374
1375         if (!beep_handle)
1376                 return -ENODEV;
1377
1378         while ((cmd = next_cmd(&buf))) {
1379                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1380                     beep_cmd >= 0 && beep_cmd <= 17) {
1381                         /* beep_cmd set */
1382                 } else
1383                         return -EINVAL;
1384                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1385                         return -EIO;
1386         }
1387
1388         return 0;
1389 }
1390
1391 static int acpi_ec_read(int i, u8 * p)
1392 {
1393         int v;
1394
1395         if (ecrd_handle) {
1396                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1397                         return 0;
1398                 *p = v;
1399         } else {
1400                 if (ec_read(i, p) < 0)
1401                         return 0;
1402         }
1403
1404         return 1;
1405 }
1406
1407 static int acpi_ec_write(int i, u8 v)
1408 {
1409         if (ecwr_handle) {
1410                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1411                         return 0;
1412         } else {
1413                 if (ec_write(i, v) < 0)
1414                         return 0;
1415         }
1416
1417         return 1;
1418 }
1419
1420 static enum thermal_access_mode thermal_read_mode;
1421
1422 static int thermal_init(void)
1423 {
1424         u8 t, ta1, ta2;
1425         int i;
1426         int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1427
1428         if (ibm_thinkpad_ec_found && experimental) {
1429                 /*
1430                  * Direct EC access mode: sensors at registers
1431                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
1432                  * non-implemented, thermal sensors return 0x80 when
1433                  * not available
1434                  */
1435
1436                 ta1 = ta2 = 0;
1437                 for (i = 0; i < 8; i++) {
1438                         if (likely(acpi_ec_read(0x78 + i, &t))) {
1439                                 ta1 |= t;
1440                         } else {
1441                                 ta1 = 0;
1442                                 break;
1443                         }
1444                         if (likely(acpi_ec_read(0xC0 + i, &t))) {
1445                                 ta2 |= t;
1446                         } else {
1447                                 ta1 = 0;
1448                                 break;
1449                         }
1450                 }
1451                 if (ta1 == 0) {
1452                         /* This is sheer paranoia, but we handle it anyway */
1453                         if (acpi_tmp7) {
1454                                 printk(IBM_ERR
1455                                        "ThinkPad ACPI EC access misbehaving, "
1456                                        "falling back to ACPI TMPx access mode\n");
1457                                 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1458                         } else {
1459                                 printk(IBM_ERR
1460                                        "ThinkPad ACPI EC access misbehaving, "
1461                                        "disabling thermal sensors access\n");
1462                                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1463                         }
1464                 } else {
1465                         thermal_read_mode =
1466                             (ta2 != 0) ?
1467                             IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1468                 }
1469         } else if (acpi_tmp7) {
1470                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1471                         /* 600e/x, 770e, 770x */
1472                         thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1473                 } else {
1474                         /* Standard ACPI TMPx access, max 8 sensors */
1475                         thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1476                 }
1477         } else {
1478                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1479                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1480         }
1481
1482         return 0;
1483 }
1484
1485 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1486 {
1487         int i, t;
1488         s8 tmp;
1489         char tmpi[] = "TMPi";
1490
1491         if (!s)
1492                 return -EINVAL;
1493
1494         switch (thermal_read_mode) {
1495 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1496         case IBMACPI_THERMAL_TPEC_16:
1497                 for (i = 0; i < 8; i++) {
1498                         if (!acpi_ec_read(0xC0 + i, &tmp))
1499                                 return -EIO;
1500                         s->temp[i + 8] = tmp * 1000;
1501                 }
1502                 /* fallthrough */
1503 #endif
1504         case IBMACPI_THERMAL_TPEC_8:
1505                 for (i = 0; i < 8; i++) {
1506                         if (!acpi_ec_read(0x78 + i, &tmp))
1507                                 return -EIO;
1508                         s->temp[i] = tmp * 1000;
1509                 }
1510                 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1511
1512         case IBMACPI_THERMAL_ACPI_UPDT:
1513                 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1514                         return -EIO;
1515                 for (i = 0; i < 8; i++) {
1516                         tmpi[3] = '0' + i;
1517                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1518                                 return -EIO;
1519                         s->temp[i] = (t - 2732) * 100;
1520                 }
1521                 return 8;
1522
1523         case IBMACPI_THERMAL_ACPI_TMP07:
1524                 for (i = 0; i < 8; i++) {
1525                         tmpi[3] = '0' + i;
1526                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1527                                 return -EIO;
1528                         s->temp[i] = t * 1000;
1529                 }
1530                 return 8;
1531
1532         case IBMACPI_THERMAL_NONE:
1533         default:
1534                 return 0;
1535         }
1536 }
1537
1538 static int thermal_read(char *p)
1539 {
1540         int len = 0;
1541         int n, i;
1542         struct ibm_thermal_sensors_struct t;
1543
1544         n = thermal_get_sensors(&t);
1545         if (unlikely(n < 0))
1546                 return n;
1547
1548         len += sprintf(p + len, "temperatures:\t");
1549
1550         if (n > 0) {
1551                 for (i = 0; i < (n - 1); i++)
1552                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1553                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1554         } else
1555                 len += sprintf(p + len, "not supported\n");
1556
1557         return len;
1558 }
1559
1560 static u8 ecdump_regs[256];
1561
1562 static int ecdump_read(char *p)
1563 {
1564         int len = 0;
1565         int i, j;
1566         u8 v;
1567
1568         len += sprintf(p + len, "EC      "
1569                        " +00 +01 +02 +03 +04 +05 +06 +07"
1570                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1571         for (i = 0; i < 256; i += 16) {
1572                 len += sprintf(p + len, "EC 0x%02x:", i);
1573                 for (j = 0; j < 16; j++) {
1574                         if (!acpi_ec_read(i + j, &v))
1575                                 break;
1576                         if (v != ecdump_regs[i + j])
1577                                 len += sprintf(p + len, " *%02x", v);
1578                         else
1579                                 len += sprintf(p + len, "  %02x", v);
1580                         ecdump_regs[i + j] = v;
1581                 }
1582                 len += sprintf(p + len, "\n");
1583                 if (j != 16)
1584                         break;
1585         }
1586
1587         /* These are way too dangerous to advertise openly... */
1588 #if 0
1589         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1590                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1591         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1592                        " (<offset> is 00-ff, <value> is 0-255)\n");
1593 #endif
1594         return len;
1595 }
1596
1597 static int ecdump_write(char *buf)
1598 {
1599         char *cmd;
1600         int i, v;
1601
1602         while ((cmd = next_cmd(&buf))) {
1603                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1604                         /* i and v set */
1605                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1606                         /* i and v set */
1607                 } else
1608                         return -EINVAL;
1609                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1610                         if (!acpi_ec_write(i, v))
1611                                 return -EIO;
1612                 } else
1613                         return -EINVAL;
1614         }
1615
1616         return 0;
1617 }
1618
1619 static int brightness_offset = 0x31;
1620
1621 static int brightness_get(struct backlight_device *bd)
1622 {
1623         u8 level;
1624         if (!acpi_ec_read(brightness_offset, &level))
1625                 return -EIO;
1626
1627         level &= 0x7;
1628
1629         return level;
1630 }
1631
1632 static int brightness_read(char *p)
1633 {
1634         int len = 0;
1635         int level;
1636
1637         if ((level = brightness_get(NULL)) < 0) {
1638                 len += sprintf(p + len, "level:\t\tunreadable\n");
1639         } else {
1640                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1641                 len += sprintf(p + len, "commands:\tup, down\n");
1642                 len += sprintf(p + len, "commands:\tlevel <level>"
1643                                " (<level> is 0-7)\n");
1644         }
1645
1646         return len;
1647 }
1648
1649 #define BRIGHTNESS_UP   4
1650 #define BRIGHTNESS_DOWN 5
1651
1652 static int brightness_set(int value)
1653 {
1654         int cmos_cmd, inc, i;
1655         int current_value = brightness_get(NULL);
1656
1657         value &= 7;
1658
1659         cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1660         inc = value > current_value ? 1 : -1;
1661         for (i = current_value; i != value; i += inc) {
1662                 if (!cmos_eval(cmos_cmd))
1663                         return -EIO;
1664                 if (!acpi_ec_write(brightness_offset, i + inc))
1665                         return -EIO;
1666         }
1667
1668         return 0;
1669 }
1670
1671 static int brightness_write(char *buf)
1672 {
1673         int level;
1674         int new_level;
1675         char *cmd;
1676
1677         while ((cmd = next_cmd(&buf))) {
1678                 if ((level = brightness_get(NULL)) < 0)
1679                         return level;
1680                 level &= 7;
1681
1682                 if (strlencmp(cmd, "up") == 0) {
1683                         new_level = level == 7 ? 7 : level + 1;
1684                 } else if (strlencmp(cmd, "down") == 0) {
1685                         new_level = level == 0 ? 0 : level - 1;
1686                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1687                            new_level >= 0 && new_level <= 7) {
1688                         /* new_level set */
1689                 } else
1690                         return -EINVAL;
1691
1692                 brightness_set(new_level);
1693         }
1694
1695         return 0;
1696 }
1697
1698 static int brightness_update_status(struct backlight_device *bd)
1699 {
1700         return brightness_set(bd->props->brightness);
1701 }
1702
1703 static struct backlight_properties ibm_backlight_data = {
1704         .owner          = THIS_MODULE,
1705         .get_brightness = brightness_get,
1706         .update_status  = brightness_update_status,
1707         .max_brightness = 7,
1708 };
1709
1710 static int brightness_init(void)
1711 {
1712         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1713                                                          &ibm_backlight_data);
1714         if (IS_ERR(ibm_backlight_device)) {
1715                 printk(IBM_ERR "Could not register backlight device\n");
1716                 return PTR_ERR(ibm_backlight_device);
1717         }
1718
1719         return 0;
1720 }
1721
1722 static void brightness_exit(void)
1723 {
1724         if (ibm_backlight_device) {
1725                 backlight_device_unregister(ibm_backlight_device);
1726                 ibm_backlight_device = NULL;
1727         }
1728 }
1729
1730 static int volume_offset = 0x30;
1731
1732 static int volume_read(char *p)
1733 {
1734         int len = 0;
1735         u8 level;
1736
1737         if (!acpi_ec_read(volume_offset, &level)) {
1738                 len += sprintf(p + len, "level:\t\tunreadable\n");
1739         } else {
1740                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1741                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1742                 len += sprintf(p + len, "commands:\tup, down, mute\n");
1743                 len += sprintf(p + len, "commands:\tlevel <level>"
1744                                " (<level> is 0-15)\n");
1745         }
1746
1747         return len;
1748 }
1749
1750 #define VOLUME_DOWN     0
1751 #define VOLUME_UP       1
1752 #define VOLUME_MUTE     2
1753
1754 static int volume_write(char *buf)
1755 {
1756         int cmos_cmd, inc, i;
1757         u8 level, mute;
1758         int new_level, new_mute;
1759         char *cmd;
1760
1761         while ((cmd = next_cmd(&buf))) {
1762                 if (!acpi_ec_read(volume_offset, &level))
1763                         return -EIO;
1764                 new_mute = mute = level & 0x40;
1765                 new_level = level = level & 0xf;
1766
1767                 if (strlencmp(cmd, "up") == 0) {
1768                         if (mute)
1769                                 new_mute = 0;
1770                         else
1771                                 new_level = level == 15 ? 15 : level + 1;
1772                 } else if (strlencmp(cmd, "down") == 0) {
1773                         if (mute)
1774                                 new_mute = 0;
1775                         else
1776                                 new_level = level == 0 ? 0 : level - 1;
1777                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1778                            new_level >= 0 && new_level <= 15) {
1779                         /* new_level set */
1780                 } else if (strlencmp(cmd, "mute") == 0) {
1781                         new_mute = 0x40;
1782                 } else
1783                         return -EINVAL;
1784
1785                 if (new_level != level) {       /* mute doesn't change */
1786                         cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1787                         inc = new_level > level ? 1 : -1;
1788
1789                         if (mute && (!cmos_eval(cmos_cmd) ||
1790                                      !acpi_ec_write(volume_offset, level)))
1791                                 return -EIO;
1792
1793                         for (i = level; i != new_level; i += inc)
1794                                 if (!cmos_eval(cmos_cmd) ||
1795                                     !acpi_ec_write(volume_offset, i + inc))
1796                                         return -EIO;
1797
1798                         if (mute && (!cmos_eval(VOLUME_MUTE) ||
1799                                      !acpi_ec_write(volume_offset,
1800                                                     new_level + mute)))
1801                                 return -EIO;
1802                 }
1803
1804                 if (new_mute != mute) { /* level doesn't change */
1805                         cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1806
1807                         if (!cmos_eval(cmos_cmd) ||
1808                             !acpi_ec_write(volume_offset, level + new_mute))
1809                                 return -EIO;
1810                 }
1811         }
1812
1813         return 0;
1814 }
1815
1816 static enum fan_status_access_mode fan_status_access_mode;
1817 static enum fan_control_access_mode fan_control_access_mode;
1818 static enum fan_control_commands fan_control_commands;
1819
1820 static int fan_control_status_known;
1821 static u8 fan_control_initial_status;
1822
1823 static void fan_watchdog_fire(struct work_struct *ignored);
1824 static int fan_watchdog_maxinterval;
1825 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1826
1827 static int fan_init(void)
1828 {
1829         fan_status_access_mode = IBMACPI_FAN_NONE;
1830         fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1831         fan_control_commands = 0;
1832         fan_control_status_known = 1;
1833         fan_watchdog_maxinterval = 0;
1834
1835         if (gfan_handle) {
1836                 /* 570, 600e/x, 770e, 770x */
1837                 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1838         } else {
1839                 /* all other ThinkPads: note that even old-style
1840                  * ThinkPad ECs supports the fan control register */
1841                 if (likely(acpi_ec_read(fan_status_offset,
1842                                         &fan_control_initial_status))) {
1843                         fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1844
1845                         /* In some ThinkPads, neither the EC nor the ACPI
1846                          * DSDT initialize the fan status, and it ends up
1847                          * being set to 0x07 when it *could* be either
1848                          * 0x07 or 0x80.
1849                          *
1850                          * Enable for TP-1Y (T43), TP-78 (R51e),
1851                          * TP-76 (R52), TP-70 (T43, R52), which are known
1852                          * to be buggy. */
1853                         if (fan_control_initial_status == 0x07 &&
1854                             ibm_thinkpad_ec_found &&
1855                             ((ibm_thinkpad_ec_found[0] == '1' &&
1856                               ibm_thinkpad_ec_found[1] == 'Y') ||
1857                              (ibm_thinkpad_ec_found[0] == '7' &&
1858                               (ibm_thinkpad_ec_found[1] == '6' ||
1859                                ibm_thinkpad_ec_found[1] == '8' ||
1860                                ibm_thinkpad_ec_found[1] == '0'))
1861                             )) {
1862                                 printk(IBM_NOTICE
1863                                        "fan_init: initial fan status is "
1864                                        "unknown, assuming it is in auto "
1865                                        "mode\n");
1866                                 fan_control_status_known = 0;
1867                         }
1868                 } else {
1869                         printk(IBM_ERR
1870                                "ThinkPad ACPI EC access misbehaving, "
1871                                "fan status and control unavailable\n");
1872                         return 0;
1873                 }
1874         }
1875
1876         if (sfan_handle) {
1877                 /* 570, 770x-JL */
1878                 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1879                 fan_control_commands |=
1880                     IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1881         } else {
1882                 if (!gfan_handle) {
1883                         /* gfan without sfan means no fan control */
1884                         /* all other models implement TP EC 0x2f control */
1885
1886                         if (fans_handle) {
1887                                 /* X31, X40, X41 */
1888                                 fan_control_access_mode =
1889                                     IBMACPI_FAN_WR_ACPI_FANS;
1890                                 fan_control_commands |=
1891                                     IBMACPI_FAN_CMD_SPEED |
1892                                     IBMACPI_FAN_CMD_LEVEL |
1893                                     IBMACPI_FAN_CMD_ENABLE;
1894                         } else {
1895                                 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1896                                 fan_control_commands |=
1897                                     IBMACPI_FAN_CMD_LEVEL |
1898                                     IBMACPI_FAN_CMD_ENABLE;
1899                         }
1900                 }
1901         }
1902
1903         return 0;
1904 }
1905
1906 static int fan_get_status(u8 *status)
1907 {
1908         u8 s;
1909
1910         /* TODO:
1911          * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1912
1913         switch (fan_status_access_mode) {
1914         case IBMACPI_FAN_RD_ACPI_GFAN:
1915                 /* 570, 600e/x, 770e, 770x */
1916
1917                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1918                         return -EIO;
1919
1920                 if (likely(status))
1921                         *status = s & 0x07;
1922
1923                 break;
1924
1925         case IBMACPI_FAN_RD_TPEC:
1926                 /* all except 570, 600e/x, 770e, 770x */
1927                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1928                         return -EIO;
1929
1930                 if (likely(status))
1931                         *status = s;
1932
1933                 break;
1934
1935         default:
1936                 return -ENXIO;
1937         }
1938
1939         return 0;
1940 }
1941
1942 static int fan_get_speed(unsigned int *speed)
1943 {
1944         u8 hi, lo;
1945
1946         switch (fan_status_access_mode) {
1947         case IBMACPI_FAN_RD_TPEC:
1948                 /* all except 570, 600e/x, 770e, 770x */
1949                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1950                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1951                         return -EIO;
1952
1953                 if (likely(speed))
1954                         *speed = (hi << 8) | lo;
1955
1956                 break;
1957
1958         default:
1959                 return -ENXIO;
1960         }
1961
1962         return 0;
1963 }
1964
1965 static void fan_exit(void)
1966 {
1967         cancel_delayed_work(&fan_watchdog_task);
1968         flush_scheduled_work();
1969 }
1970
1971 static void fan_watchdog_reset(void)
1972 {
1973         static int fan_watchdog_active = 0;
1974
1975         if (fan_watchdog_active)
1976                 cancel_delayed_work(&fan_watchdog_task);
1977
1978         if (fan_watchdog_maxinterval > 0) {
1979                 fan_watchdog_active = 1;
1980                 if (!schedule_delayed_work(&fan_watchdog_task,
1981                                 msecs_to_jiffies(fan_watchdog_maxinterval
1982                                                  * 1000))) {
1983                         printk(IBM_ERR "failed to schedule the fan watchdog, "
1984                                "watchdog will not trigger\n");
1985                 }
1986         } else
1987                 fan_watchdog_active = 0;
1988 }
1989
1990 static int fan_read(char *p)
1991 {
1992         int len = 0;
1993         int rc;
1994         u8 status;
1995         unsigned int speed = 0;
1996
1997         switch (fan_status_access_mode) {
1998         case IBMACPI_FAN_RD_ACPI_GFAN:
1999                 /* 570, 600e/x, 770e, 770x */
2000                 if ((rc = fan_get_status(&status)) < 0)
2001                         return rc;
2002
2003                 len += sprintf(p + len, "status:\t\t%s\n"
2004                                "level:\t\t%d\n",
2005                                (status != 0) ? "enabled" : "disabled", status);
2006                 break;
2007
2008         case IBMACPI_FAN_RD_TPEC:
2009                 /* all except 570, 600e/x, 770e, 770x */
2010                 if ((rc = fan_get_status(&status)) < 0)
2011                         return rc;
2012
2013                 if (unlikely(!fan_control_status_known)) {
2014                         if (status != fan_control_initial_status)
2015                                 fan_control_status_known = 1;
2016                         else
2017                                 /* Return most likely status. In fact, it
2018                                  * might be the only possible status */
2019                                 status = IBMACPI_FAN_EC_AUTO;
2020                 }
2021
2022                 len += sprintf(p + len, "status:\t\t%s\n",
2023                                (status != 0) ? "enabled" : "disabled");
2024
2025                 /* No ThinkPad boots on disengaged mode, we can safely
2026                  * assume the tachometer is online if fan control status
2027                  * was unknown */
2028                 if ((rc = fan_get_speed(&speed)) < 0)
2029                         return rc;
2030
2031                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2032
2033                 if (status & IBMACPI_FAN_EC_DISENGAGED)
2034                         /* Disengaged mode takes precedence */
2035                         len += sprintf(p + len, "level:\t\tdisengaged\n");
2036                 else if (status & IBMACPI_FAN_EC_AUTO)
2037                         len += sprintf(p + len, "level:\t\tauto\n");
2038                 else
2039                         len += sprintf(p + len, "level:\t\t%d\n", status);
2040                 break;
2041
2042         case IBMACPI_FAN_NONE:
2043         default:
2044                 len += sprintf(p + len, "status:\t\tnot supported\n");
2045         }
2046
2047         if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2048                 len += sprintf(p + len, "commands:\tlevel <level>");
2049
2050                 switch (fan_control_access_mode) {
2051                 case IBMACPI_FAN_WR_ACPI_SFAN:
2052                         len += sprintf(p + len, " (<level> is 0-7)\n");
2053                         break;
2054
2055                 default:
2056                         len += sprintf(p + len, " (<level> is 0-7, "
2057                                        "auto, disengaged)\n");
2058                         break;
2059                 }
2060         }
2061
2062         if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2063                 len += sprintf(p + len, "commands:\tenable, disable\n"
2064                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2065                                "1-120 (seconds))\n");
2066
2067         if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2068                 len += sprintf(p + len, "commands:\tspeed <speed>"
2069                                " (<speed> is 0-65535)\n");
2070
2071         return len;
2072 }
2073
2074 static int fan_set_level(int level)
2075 {
2076         switch (fan_control_access_mode) {
2077         case IBMACPI_FAN_WR_ACPI_SFAN:
2078                 if (level >= 0 && level <= 7) {
2079                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2080                                 return -EIO;
2081                 } else
2082                         return -EINVAL;
2083                 break;
2084
2085         case IBMACPI_FAN_WR_ACPI_FANS:
2086         case IBMACPI_FAN_WR_TPEC:
2087                 if ((level != IBMACPI_FAN_EC_AUTO) &&
2088                     (level != IBMACPI_FAN_EC_DISENGAGED) &&
2089                     ((level < 0) || (level > 7)))
2090                         return -EINVAL;
2091
2092                 if (!acpi_ec_write(fan_status_offset, level))
2093                         return -EIO;
2094                 else
2095                         fan_control_status_known = 1;
2096                 break;
2097
2098         default:
2099                 return -ENXIO;
2100         }
2101         return 0;
2102 }
2103
2104 static int fan_set_enable(void)
2105 {
2106         u8 s;
2107         int rc;
2108
2109         switch (fan_control_access_mode) {
2110         case IBMACPI_FAN_WR_ACPI_FANS:
2111         case IBMACPI_FAN_WR_TPEC:
2112                 if ((rc = fan_get_status(&s)) < 0)
2113                         return rc;
2114
2115                 /* Don't go out of emergency fan mode */
2116                 if (s != 7)
2117                         s = IBMACPI_FAN_EC_AUTO;
2118
2119                 if (!acpi_ec_write(fan_status_offset, s))
2120                         return -EIO;
2121                 else
2122                         fan_control_status_known = 1;
2123                 break;
2124
2125         case IBMACPI_FAN_WR_ACPI_SFAN:
2126                 if ((rc = fan_get_status(&s)) < 0)
2127                         return rc;
2128
2129                 s &= 0x07;
2130
2131                 /* Set fan to at least level 4 */
2132                 if (s < 4)
2133                         s = 4;
2134
2135                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2136                         return -EIO;
2137                 break;
2138
2139         default:
2140                 return -ENXIO;
2141         }
2142         return 0;
2143 }
2144
2145 static int fan_set_disable(void)
2146 {
2147         switch (fan_control_access_mode) {
2148         case IBMACPI_FAN_WR_ACPI_FANS:
2149         case IBMACPI_FAN_WR_TPEC:
2150                 if (!acpi_ec_write(fan_status_offset, 0x00))
2151                         return -EIO;
2152                 else
2153                         fan_control_status_known = 1;
2154                 break;
2155
2156         case IBMACPI_FAN_WR_ACPI_SFAN:
2157                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2158                         return -EIO;
2159                 break;
2160
2161         default:
2162                 return -ENXIO;
2163         }
2164         return 0;
2165 }
2166
2167 static int fan_set_speed(int speed)
2168 {
2169         switch (fan_control_access_mode) {
2170         case IBMACPI_FAN_WR_ACPI_FANS:
2171                 if (speed >= 0 && speed <= 65535) {
2172                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2173                                         speed, speed, speed))
2174                                 return -EIO;
2175                 } else
2176                         return -EINVAL;
2177                 break;
2178
2179         default:
2180                 return -ENXIO;
2181         }
2182         return 0;
2183 }
2184
2185 static int fan_write_cmd_level(const char *cmd, int *rc)
2186 {
2187         int level;
2188
2189         if (strlencmp(cmd, "level auto") == 0)
2190                 level = IBMACPI_FAN_EC_AUTO;
2191         else if (strlencmp(cmd, "level disengaged") == 0)
2192                 level = IBMACPI_FAN_EC_DISENGAGED;
2193         else if (sscanf(cmd, "level %d", &level) != 1)
2194                 return 0;
2195
2196         if ((*rc = fan_set_level(level)) == -ENXIO)
2197                 printk(IBM_ERR "level command accepted for unsupported "
2198                        "access mode %d", fan_control_access_mode);
2199
2200         return 1;
2201 }
2202
2203 static int fan_write_cmd_enable(const char *cmd, int *rc)
2204 {
2205         if (strlencmp(cmd, "enable") != 0)
2206                 return 0;
2207
2208         if ((*rc = fan_set_enable()) == -ENXIO)
2209                 printk(IBM_ERR "enable command accepted for unsupported "
2210                        "access mode %d", fan_control_access_mode);
2211
2212         return 1;
2213 }
2214
2215 static int fan_write_cmd_disable(const char *cmd, int *rc)
2216 {
2217         if (strlencmp(cmd, "disable") != 0)
2218                 return 0;
2219
2220         if ((*rc = fan_set_disable()) == -ENXIO)
2221                 printk(IBM_ERR "disable command accepted for unsupported "
2222                        "access mode %d", fan_control_access_mode);
2223
2224         return 1;
2225 }
2226
2227 static int fan_write_cmd_speed(const char *cmd, int *rc)
2228 {
2229         int speed;
2230
2231         /* TODO:
2232          * Support speed <low> <medium> <high> ? */
2233
2234         if (sscanf(cmd, "speed %d", &speed) != 1)
2235                 return 0;
2236
2237         if ((*rc = fan_set_speed(speed)) == -ENXIO)
2238                 printk(IBM_ERR "speed command accepted for unsupported "
2239                        "access mode %d", fan_control_access_mode);
2240
2241         return 1;
2242 }
2243
2244 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2245 {
2246         int interval;
2247
2248         if (sscanf(cmd, "watchdog %d", &interval) != 1)
2249                 return 0;
2250
2251         if (interval < 0 || interval > 120)
2252                 *rc = -EINVAL;
2253         else
2254                 fan_watchdog_maxinterval = interval;
2255
2256         return 1;
2257 }
2258
2259 static int fan_write(char *buf)
2260 {
2261         char *cmd;
2262         int rc = 0;
2263
2264         while (!rc && (cmd = next_cmd(&buf))) {
2265                 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2266                       fan_write_cmd_level(cmd, &rc)) &&
2267                     !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2268                       (fan_write_cmd_enable(cmd, &rc) ||
2269                        fan_write_cmd_disable(cmd, &rc) ||
2270                        fan_write_cmd_watchdog(cmd, &rc))) &&
2271                     !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2272                       fan_write_cmd_speed(cmd, &rc))
2273                     )
2274                         rc = -EINVAL;
2275                 else if (!rc)
2276                         fan_watchdog_reset();
2277         }
2278
2279         return rc;
2280 }
2281
2282 static void fan_watchdog_fire(struct work_struct *ignored)
2283 {
2284         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2285         if (fan_set_enable()) {
2286                 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2287                 /* reschedule for later */
2288                 fan_watchdog_reset();
2289         }
2290 }
2291
2292 static struct ibm_struct ibms[] = {
2293         {
2294          .name = "driver",
2295          .init = ibm_acpi_driver_init,
2296          .read = driver_read,
2297          },
2298         {
2299          .name = "hotkey",
2300          .hid = IBM_HKEY_HID,
2301          .init = hotkey_init,
2302          .read = hotkey_read,
2303          .write = hotkey_write,
2304          .exit = hotkey_exit,
2305          .notify = hotkey_notify,
2306          .handle = &hkey_handle,
2307          .type = ACPI_DEVICE_NOTIFY,
2308          },
2309         {
2310          .name = "bluetooth",
2311          .init = bluetooth_init,
2312          .read = bluetooth_read,
2313          .write = bluetooth_write,
2314          },
2315         {
2316          .name = "wan",
2317          .init = wan_init,
2318          .read = wan_read,
2319          .write = wan_write,
2320          .experimental = 1,
2321          },
2322         {
2323          .name = "video",
2324          .init = video_init,
2325          .read = video_read,
2326          .write = video_write,
2327          .exit = video_exit,
2328          },
2329         {
2330          .name = "light",
2331          .init = light_init,
2332          .read = light_read,
2333          .write = light_write,
2334          },
2335 #ifdef CONFIG_ACPI_IBM_DOCK
2336         {
2337          .name = "dock",
2338          .read = dock_read,
2339          .write = dock_write,
2340          .notify = dock_notify,
2341          .handle = &dock_handle,
2342          .type = ACPI_SYSTEM_NOTIFY,
2343          },
2344         {
2345          .name = "dock",
2346          .hid = IBM_PCI_HID,
2347          .notify = dock_notify,
2348          .handle = &pci_handle,
2349          .type = ACPI_SYSTEM_NOTIFY,
2350          },
2351 #endif
2352         {
2353          .name = "bay",
2354          .init = bay_init,
2355          .read = bay_read,
2356          .write = bay_write,
2357          .notify = bay_notify,
2358          .handle = &bay_handle,
2359          .type = ACPI_SYSTEM_NOTIFY,
2360          },
2361         {
2362          .name = "cmos",
2363          .read = cmos_read,
2364          .write = cmos_write,
2365          },
2366         {
2367          .name = "led",
2368          .init = led_init,
2369          .read = led_read,
2370          .write = led_write,
2371          },
2372         {
2373          .name = "beep",
2374          .read = beep_read,
2375          .write = beep_write,
2376          },
2377         {
2378          .name = "thermal",
2379          .init = thermal_init,
2380          .read = thermal_read,
2381          },
2382         {
2383          .name = "ecdump",
2384          .read = ecdump_read,
2385          .write = ecdump_write,
2386          .experimental = 1,
2387          },
2388         {
2389          .name = "brightness",
2390          .read = brightness_read,
2391          .write = brightness_write,
2392          .init = brightness_init,
2393          .exit = brightness_exit,
2394          },
2395         {
2396          .name = "volume",
2397          .read = volume_read,
2398          .write = volume_write,
2399          },
2400         {
2401          .name = "fan",
2402          .read = fan_read,
2403          .write = fan_write,
2404          .init = fan_init,
2405          .exit = fan_exit,
2406          .experimental = 1,
2407          },
2408 };
2409
2410 static int dispatch_read(char *page, char **start, off_t off, int count,
2411                          int *eof, void *data)
2412 {
2413         struct ibm_struct *ibm = data;
2414         int len;
2415
2416         if (!ibm || !ibm->read)
2417                 return -EINVAL;
2418
2419         len = ibm->read(page);
2420         if (len < 0)
2421                 return len;
2422
2423         if (len <= off + count)
2424                 *eof = 1;
2425         *start = page + off;
2426         len -= off;
2427         if (len > count)
2428                 len = count;
2429         if (len < 0)
2430                 len = 0;
2431
2432         return len;
2433 }
2434
2435 static int dispatch_write(struct file *file, const char __user * userbuf,
2436                           unsigned long count, void *data)
2437 {
2438         struct ibm_struct *ibm = data;
2439         char *kernbuf;
2440         int ret;
2441
2442         if (!ibm || !ibm->write)
2443                 return -EINVAL;
2444
2445         kernbuf = kmalloc(count + 2, GFP_KERNEL);
2446         if (!kernbuf)
2447                 return -ENOMEM;
2448
2449         if (copy_from_user(kernbuf, userbuf, count)) {
2450                 kfree(kernbuf);
2451                 return -EFAULT;
2452         }
2453
2454         kernbuf[count] = 0;
2455         strcat(kernbuf, ",");
2456         ret = ibm->write(kernbuf);
2457         if (ret == 0)
2458                 ret = count;
2459
2460         kfree(kernbuf);
2461
2462         return ret;
2463 }
2464
2465 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2466 {
2467         struct ibm_struct *ibm = data;
2468
2469         if (!ibm || !ibm->notify)
2470                 return;
2471
2472         ibm->notify(ibm, event);
2473 }
2474
2475 static int __init setup_notify(struct ibm_struct *ibm)
2476 {
2477         acpi_status status;
2478         int ret;
2479
2480         if (!*ibm->handle)
2481                 return 0;
2482
2483         ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2484         if (ret < 0) {
2485                 printk(IBM_ERR "%s device not present\n", ibm->name);
2486                 return 0;
2487         }
2488
2489         acpi_driver_data(ibm->device) = ibm;
2490         sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2491
2492         status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2493                                              dispatch_notify, ibm);
2494         if (ACPI_FAILURE(status)) {
2495                 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2496                        ibm->name, status);
2497                 return -ENODEV;
2498         }
2499         ibm->notify_installed = 1;
2500         return 0;
2501 }
2502
2503 static int __init ibm_device_add(struct acpi_device *device)
2504 {
2505         return 0;
2506 }
2507
2508 static int __init register_driver(struct ibm_struct *ibm)
2509 {
2510         int ret;
2511
2512         ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2513         if (!ibm->driver) {
2514                 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2515                 return -1;
2516         }
2517
2518         sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2519         ibm->driver->ids = ibm->hid;
2520         ibm->driver->ops.add = &ibm_device_add;
2521
2522         ret = acpi_bus_register_driver(ibm->driver);
2523         if (ret < 0) {
2524                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2525                        ibm->hid, ret);
2526                 kfree(ibm->driver);
2527         }
2528
2529         return ret;
2530 }
2531
2532 static int __init ibm_init(struct ibm_struct *ibm)
2533 {
2534         int ret;
2535         struct proc_dir_entry *entry;
2536
2537         if (ibm->experimental && !experimental)
2538                 return 0;
2539
2540         if (ibm->hid) {
2541                 ret = register_driver(ibm);
2542                 if (ret < 0)
2543                         return ret;
2544                 ibm->driver_registered = 1;
2545         }
2546
2547         if (ibm->init) {
2548                 ret = ibm->init();
2549                 if (ret != 0)
2550                         return ret;
2551                 ibm->init_called = 1;
2552         }
2553
2554         if (ibm->read) {
2555                 entry = create_proc_entry(ibm->name,
2556                                           S_IFREG | S_IRUGO | S_IWUSR,
2557                                           proc_dir);
2558                 if (!entry) {
2559                         printk(IBM_ERR "unable to create proc entry %s\n",
2560                                ibm->name);
2561                         return -ENODEV;
2562                 }
2563                 entry->owner = THIS_MODULE;
2564                 entry->data = ibm;
2565                 entry->read_proc = &dispatch_read;
2566                 if (ibm->write)
2567                         entry->write_proc = &dispatch_write;
2568                 ibm->proc_created = 1;
2569         }
2570
2571         if (ibm->notify) {
2572                 ret = setup_notify(ibm);
2573                 if (ret < 0)
2574                         return ret;
2575         }
2576
2577         return 0;
2578 }
2579
2580 static void ibm_exit(struct ibm_struct *ibm)
2581 {
2582         if (ibm->notify_installed)
2583                 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2584                                            dispatch_notify);
2585
2586         if (ibm->proc_created)
2587                 remove_proc_entry(ibm->name, proc_dir);
2588
2589         if (ibm->init_called && ibm->exit)
2590                 ibm->exit();
2591
2592         if (ibm->driver_registered) {
2593                 acpi_bus_unregister_driver(ibm->driver);
2594                 kfree(ibm->driver);
2595         }
2596 }
2597
2598 static void __init ibm_handle_init(char *name,
2599                                    acpi_handle * handle, acpi_handle parent,
2600                                    char **paths, int num_paths, char **path)
2601 {
2602         int i;
2603         acpi_status status;
2604
2605         for (i = 0; i < num_paths; i++) {
2606                 status = acpi_get_handle(parent, paths[i], handle);
2607                 if (ACPI_SUCCESS(status)) {
2608                         *path = paths[i];
2609                         return;
2610                 }
2611         }
2612
2613         *handle = NULL;
2614 }
2615
2616 #define IBM_HANDLE_INIT(object)                                         \
2617         ibm_handle_init(#object, &object##_handle, *object##_parent,    \
2618                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2619
2620 static int set_ibm_param(const char *val, struct kernel_param *kp)
2621 {
2622         unsigned int i;
2623
2624         for (i = 0; i < ARRAY_SIZE(ibms); i++)
2625                 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2626                         if (strlen(val) > sizeof(ibms[i].param) - 2)
2627                                 return -ENOSPC;
2628                         strcpy(ibms[i].param, val);
2629                         strcat(ibms[i].param, ",");
2630                         return 0;
2631                 }
2632
2633         return -EINVAL;
2634 }
2635
2636 #define IBM_PARAM(feature) \
2637         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2638
2639 IBM_PARAM(hotkey);
2640 IBM_PARAM(bluetooth);
2641 IBM_PARAM(video);
2642 IBM_PARAM(light);
2643 #ifdef CONFIG_ACPI_IBM_DOCK
2644 IBM_PARAM(dock);
2645 #endif
2646 IBM_PARAM(bay);
2647 IBM_PARAM(cmos);
2648 IBM_PARAM(led);
2649 IBM_PARAM(beep);
2650 IBM_PARAM(ecdump);
2651 IBM_PARAM(brightness);
2652 IBM_PARAM(volume);
2653 IBM_PARAM(fan);
2654
2655 static void acpi_ibm_exit(void)
2656 {
2657         int i;
2658
2659         for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2660                 ibm_exit(&ibms[i]);
2661
2662         remove_proc_entry(IBM_DIR, acpi_root_dir);
2663
2664         if (ibm_thinkpad_ec_found)
2665                 kfree(ibm_thinkpad_ec_found);
2666 }
2667
2668 static char* __init check_dmi_for_ec(void)
2669 {
2670         struct dmi_device *dev = NULL;
2671         char ec_fw_string[18];
2672
2673         /*
2674          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2675          * X32 or newer, all Z series;  Some models must have an
2676          * up-to-date BIOS or they will not be detected.
2677          *
2678          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2679          */
2680         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2681                 if (sscanf(dev->name,
2682                            "IBM ThinkPad Embedded Controller -[%17c",
2683                            ec_fw_string) == 1) {
2684                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2685                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2686                         return kstrdup(ec_fw_string, GFP_KERNEL);
2687                 }
2688         }
2689         return NULL;
2690 }
2691
2692 static int __init acpi_ibm_init(void)
2693 {
2694         int ret, i;
2695
2696         if (acpi_disabled)
2697                 return -ENODEV;
2698
2699         if (!acpi_specific_hotkey_enabled) {
2700                 printk(IBM_ERR "using generic hotkey driver\n");
2701                 return -ENODEV;
2702         }
2703
2704         /* ec is required because many other handles are relative to it */
2705         IBM_HANDLE_INIT(ec);
2706         if (!ec_handle) {
2707                 printk(IBM_ERR "ec object not found\n");
2708                 return -ENODEV;
2709         }
2710
2711         /* Models with newer firmware report the EC in DMI */
2712         ibm_thinkpad_ec_found = check_dmi_for_ec();
2713         if (ibm_thinkpad_ec_found)
2714                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
2715                        ibm_thinkpad_ec_found);
2716
2717         /* these handles are not required */
2718         IBM_HANDLE_INIT(vid);
2719         IBM_HANDLE_INIT(vid2);
2720         IBM_HANDLE_INIT(ledb);
2721         IBM_HANDLE_INIT(led);
2722         IBM_HANDLE_INIT(hkey);
2723         IBM_HANDLE_INIT(lght);
2724         IBM_HANDLE_INIT(cmos);
2725 #ifdef CONFIG_ACPI_IBM_DOCK
2726         IBM_HANDLE_INIT(dock);
2727 #endif
2728         IBM_HANDLE_INIT(pci);
2729         IBM_HANDLE_INIT(bay);
2730         if (bay_handle)
2731                 IBM_HANDLE_INIT(bay_ej);
2732         IBM_HANDLE_INIT(bay2);
2733         if (bay2_handle)
2734                 IBM_HANDLE_INIT(bay2_ej);
2735         IBM_HANDLE_INIT(beep);
2736         IBM_HANDLE_INIT(ecrd);
2737         IBM_HANDLE_INIT(ecwr);
2738         IBM_HANDLE_INIT(fans);
2739         IBM_HANDLE_INIT(gfan);
2740         IBM_HANDLE_INIT(sfan);
2741
2742         proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2743         if (!proc_dir) {
2744                 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2745                 return -ENODEV;
2746         }
2747         proc_dir->owner = THIS_MODULE;
2748
2749         for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2750                 ret = ibm_init(&ibms[i]);
2751                 if (ret >= 0 && *ibms[i].param)
2752                         ret = ibms[i].write(ibms[i].param);
2753                 if (ret < 0) {
2754                         acpi_ibm_exit();
2755                         return ret;
2756                 }
2757         }
2758
2759         return 0;
2760 }
2761
2762 module_init(acpi_ibm_init);
2763 module_exit(acpi_ibm_exit);