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 <linux/fb.h>
  90 #include <asm/uaccess.h>
  91
  92 #include <linux/dmi.h>
  93 #include <linux/jiffies.h>
  94 #include <linux/workqueue.h>
  95
  96 #include <acpi/acpi_drivers.h>
  97 #include <acpi/acnamesp.h>
  98
  99 #define IBM_NAME "ibm"
 100 #define IBM_DESC "IBM ThinkPad ACPI Extras"
 101 #define IBM_FILE "ibm_acpi"
 102 #define IBM_URL "http://ibm-acpi.sf.net/"
 103
 104 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
 105 MODULE_DESCRIPTION(IBM_DESC);
 106 MODULE_VERSION(IBM_VERSION);
 107 MODULE_LICENSE("GPL");
 108
 109 #define IBM_DIR IBM_NAME
 110
 111 #define IBM_LOG IBM_FILE ": "
 112 #define IBM_ERR    KERN_ERR    IBM_LOG
 113 #define IBM_NOTICE KERN_NOTICE IBM_LOG
 114 #define IBM_INFO   KERN_INFO   IBM_LOG
 115 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
 116
 117 #define IBM_MAX_ACPI_ARGS 3
 118
 119 #define __unused __attribute__ ((unused))
 120
 121 static int experimental;
 122 module_param(experimental, int, 0);
 123
 124 static acpi_handle root_handle = NULL;
 125
 126 #define IBM_HANDLE(object, parent, paths...)                    \
 127         static acpi_handle  object##_handle;                    \
 128         static acpi_handle *object##_parent = &parent##_handle; \
 129         static char        *object##_path;                      \
 130         static char        *object##_paths[] = { paths }
 131
 132 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 133            "\\_SB.PCI.ISA.EC",  /* 570 */
 134            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 135            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 136            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 137            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 138            "\\_SB.PCI0.LPC.EC", /* all others */
 139     );
 140
 141 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 142            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 143            "\\_SB.PCI0.VID0",   /* 770e */
 144            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 145            "\\_SB.PCI0.AGP.VID",        /* all others */
 146     );                          /* R30, R31 */
 147
 148 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 149
 150 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 151            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 152            "\\CMS",             /* R40, R40e */
 153     );                          /* all others */
 154 #ifdef CONFIG_ACPI_IBM_DOCK
 155 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
 156            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
 157            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
 158            "\\_SB.PCI.ISA.SLCE",        /* 570 */
 159     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
 160 #endif
 161 #ifdef CONFIG_ACPI_IBM_BAY
 162 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
 163            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
 164            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
 165            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
 166     );                          /* A21e, R30, R31 */
 167
 168 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
 169            "_EJ0",              /* all others */
 170     );                          /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
 171
 172 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
 173            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
 174     );                          /* all others */
 175
 176 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
 177            "_EJ0",              /* 770x */
 178     );                          /* all others */
 179 #endif /* CONFIG_ACPI_IBM_BAY */
 180
 181 /* don't list other alternatives as we install a notify handler on the 570 */
 182 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
 183
 184 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 185            "^HKEY",             /* R30, R31 */
 186            "HKEY",              /* all others */
 187     );                          /* 570 */
 188
 189 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
 190 IBM_HANDLE(ledb, ec, "LEDB");   /* G4x */
 191
 192 IBM_HANDLE(led, ec, "SLED",     /* 570 */
 193            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 194            "LED",               /* all others */
 195     );                          /* R30, R31 */
 196
 197 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
 198 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 199 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 200 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
 201
 202 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
 203            "\\FSPD",            /* 600e/x, 770e, 770x */
 204     );                          /* all others */
 205
 206 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
 207            "JFNS",              /* 770x-JL */
 208     );                          /* all others */
 209
 210 #define IBM_HKEY_HID    "IBM0068"
 211 #define IBM_PCI_HID     "PNP0A03"
 212
 213 enum thermal_access_mode {
 214         IBMACPI_THERMAL_NONE = 0,       /* No thermal support */
 215         IBMACPI_THERMAL_ACPI_TMP07,     /* Use ACPI TMP0-7 */
 216         IBMACPI_THERMAL_ACPI_UPDT,      /* Use ACPI TMP0-7 with UPDT */
 217         IBMACPI_THERMAL_TPEC_8,         /* Use ACPI EC regs, 8 sensors */
 218         IBMACPI_THERMAL_TPEC_16,        /* Use ACPI EC regs, 16 sensors */
 219 };
 220
 221 #define IBMACPI_MAX_THERMAL_SENSORS 16  /* Max thermal sensors supported */
 222 struct ibm_thermal_sensors_struct {
 223         s32 temp[IBMACPI_MAX_THERMAL_SENSORS];
 224 };
 225
 226 /*
 227  * FAN ACCESS MODES
 228  *
 229  * IBMACPI_FAN_RD_ACPI_GFAN:
 230  *      ACPI GFAN method: returns fan level
 231  *
 232  *      see IBMACPI_FAN_WR_ACPI_SFAN
 233  *      EC 0x2f not available if GFAN exists
 234  *
 235  * IBMACPI_FAN_WR_ACPI_SFAN:
 236  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
 237  *
 238  *      EC 0x2f might be available *for reading*, but never for writing.
 239  *
 240  * IBMACPI_FAN_WR_TPEC:
 241  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
 242  *      on almost all ThinkPads
 243  *
 244  *      Fan speed changes of any sort (including those caused by the
 245  *      disengaged mode) are usually done slowly by the firmware as the
 246  *      maximum ammount of fan duty cycle change per second seems to be
 247  *      limited.
 248  *
 249  *      Reading is not available if GFAN exists.
 250  *      Writing is not available if SFAN exists.
 251  *
 252  *      Bits
 253  *       7      automatic mode engaged;
 254  *              (default operation mode of the ThinkPad)
 255  *              fan level is ignored in this mode.
 256  *       6      disengage mode (takes precedence over bit 7);
 257  *              not available on all thinkpads.  May disable
 258  *              the tachometer, and speeds up fan to 100% duty-cycle,
 259  *              which speeds it up far above the standard RPM
 260  *              levels.  It is not impossible that it could cause
 261  *              hardware damage.
 262  *      5-3     unused in some models.  Extra bits for fan level
 263  *              in others, but still useless as all values above
 264  *              7 map to the same speed as level 7 in these models.
 265  *      2-0     fan level (0..7 usually)
 266  *                      0x00 = stop
 267  *                      0x07 = max (set when temperatures critical)
 268  *              Some ThinkPads may have other levels, see
 269  *              IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
 270  *
 271  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
 272  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
 273  *      does so, its initial value is meaningless (0x07).
 274  *
 275  *      For firmware bugs, refer to:
 276  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 277  *
 278  *      ----
 279  *
 280  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
 281  *      Main fan tachometer reading (in RPM)
 282  *
 283  *      This register is present on all ThinkPads with a new-style EC, and
 284  *      it is known not to be present on the A21m/e, and T22, as there is
 285  *      something else in offset 0x84 according to the ACPI DSDT.  Other
 286  *      ThinkPads from this same time period (and earlier) probably lack the
 287  *      tachometer as well.
 288  *
 289  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
 290  *      was never fixed by IBM to report the EC firmware version string
 291  *      probably support the tachometer (like the early X models), so
 292  *      detecting it is quite hard.  We need more data to know for sure.
 293  *
 294  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
 295  *      might result.
 296  *
 297  *      FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
 298  *      register is not invalidated in ThinkPads that disable tachometer
 299  *      readings.  Thus, the tachometer readings go stale.
 300  *
 301  *      For firmware bugs, refer to:
 302  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 303  *
 304  * IBMACPI_FAN_WR_ACPI_FANS:
 305  *      ThinkPad X31, X40, X41.  Not available in the X60.
 306  *
 307  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
 308  *      high speed.  ACPI DSDT seems to map these three speeds to levels
 309  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
 310  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
 311  *
 312  *      The speeds are stored on handles
 313  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
 314  *
 315  *      There are three default speed sets, acessible as handles:
 316  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
 317  *
 318  *      ACPI DSDT switches which set is in use depending on various
 319  *      factors.
 320  *
 321  *      IBMACPI_FAN_WR_TPEC is also available and should be used to
 322  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
 323  *      but the ACPI tables just mention level 7.
 324  */
 325
 326 enum fan_status_access_mode {
 327         IBMACPI_FAN_NONE = 0,           /* No fan status or control */
 328         IBMACPI_FAN_RD_ACPI_GFAN,       /* Use ACPI GFAN */
 329         IBMACPI_FAN_RD_TPEC,            /* Use ACPI EC regs 0x2f, 0x84-0x85 */
 330 };
 331
 332 enum fan_control_access_mode {
 333         IBMACPI_FAN_WR_NONE = 0,        /* No fan control */
 334         IBMACPI_FAN_WR_ACPI_SFAN,       /* Use ACPI SFAN */
 335         IBMACPI_FAN_WR_TPEC,            /* Use ACPI EC reg 0x2f */
 336         IBMACPI_FAN_WR_ACPI_FANS,       /* Use ACPI FANS and EC reg 0x2f */
 337 };
 338
 339 enum fan_control_commands {
 340         IBMACPI_FAN_CMD_SPEED   = 0x0001,       /* speed command */
 341         IBMACPI_FAN_CMD_LEVEL   = 0x0002,       /* level command  */
 342         IBMACPI_FAN_CMD_ENABLE  = 0x0004,       /* enable/disable cmd,
 343                                                  * and also watchdog cmd */
 344 };
 345
 346 enum {                                  /* Fan control constants */
 347         fan_status_offset = 0x2f,       /* EC register 0x2f */
 348         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
 349                                          * 0x84 must be read before 0x85 */
 350
 351         IBMACPI_FAN_EC_DISENGAGED       = 0x40, /* EC mode: tachometer
 352                                                  * disengaged */
 353         IBMACPI_FAN_EC_AUTO             = 0x80, /* EC mode: auto fan
 354                                                  * control */
 355 };
 356
 357 static char *ibm_thinkpad_ec_found = NULL;
 358
 359 struct ibm_struct {
 360         char *name;
 361         char param[32];
 362
 363         char *hid;
 364         struct acpi_driver *driver;
 365
 366         int (*init) (void);
 367         int (*read) (char *);
 368         int (*write) (char *);
 369         void (*exit) (void);
 370
 371         void (*notify) (struct ibm_struct *, u32);
 372         acpi_handle *handle;
 373         int type;
 374         struct acpi_device *device;
 375
 376         int driver_registered;
 377         int proc_created;
 378         int init_called;
 379         int notify_installed;
 380
 381         int experimental;
 382 };
 383
 384 static struct proc_dir_entry *proc_dir = NULL;
 385
 386 static struct backlight_device *ibm_backlight_device = NULL;
 387
 388 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
 389 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 390 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
 391
 392 static int acpi_evalf(acpi_handle handle,
 393                       void *res, char *method, char *fmt, ...)
 394 {
 395         char *fmt0 = fmt;
 396         struct acpi_object_list params;
 397         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 398         struct acpi_buffer result, *resultp;
 399         union acpi_object out_obj;
 400         acpi_status status;
 401         va_list ap;
 402         char res_type;
 403         int success;
 404         int quiet;
 405
 406         if (!*fmt) {
 407                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 408                 return 0;
 409         }
 410
 411         if (*fmt == 'q') {
 412                 quiet = 1;
 413                 fmt++;
 414         } else
 415                 quiet = 0;
 416
 417         res_type = *(fmt++);
 418
 419         params.count = 0;
 420         params.pointer = &in_objs[0];
 421
 422         va_start(ap, fmt);
 423         while (*fmt) {
 424                 char c = *(fmt++);
 425                 switch (c) {
 426                 case 'd':       /* int */
 427                         in_objs[params.count].integer.value = va_arg(ap, int);
 428                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 429                         break;
 430                         /* add more types as needed */
 431                 default:
 432                         printk(IBM_ERR "acpi_evalf() called "
 433                                "with invalid format character '%c'\n", c);
 434                         return 0;
 435                 }
 436         }
 437         va_end(ap);
 438
 439         if (res_type != 'v') {
 440                 result.length = sizeof(out_obj);
 441                 result.pointer = &out_obj;
 442                 resultp = &result;
 443         } else
 444                 resultp = NULL;
 445
 446         status = acpi_evaluate_object(handle, method, &params, resultp);
 447
 448         switch (res_type) {
 449         case 'd':               /* int */
 450                 if (res)
 451                         *(int *)res = out_obj.integer.value;
 452                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 453                 break;
 454         case 'v':               /* void */
 455                 success = status == AE_OK;
 456                 break;
 457                 /* add more types as needed */
 458         default:
 459                 printk(IBM_ERR "acpi_evalf() called "
 460                        "with invalid format character '%c'\n", res_type);
 461                 return 0;
 462         }
 463
 464         if (!success && !quiet)
 465                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 466                        method, fmt0, status);
 467
 468         return success;
 469 }
 470
 471 static void __unused acpi_print_int(acpi_handle handle, char *method)
 472 {
 473         int i;
 474
 475         if (acpi_evalf(handle, &i, method, "d"))
 476                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 477         else
 478                 printk(IBM_ERR "error calling %s\n", method);
 479 }
 480
 481 static char *next_cmd(char **cmds)
 482 {
 483         char *start = *cmds;
 484         char *end;
 485
 486         while ((end = strchr(start, ',')) && end == start)
 487                 start = end + 1;
 488
 489         if (!end)
 490                 return NULL;
 491
 492         *end = 0;
 493         *cmds = end + 1;
 494         return start;
 495 }
 496
 497 static int ibm_acpi_driver_init(void)
 498 {
 499         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 500         printk(IBM_INFO "%s\n", IBM_URL);
 501
 502         if (ibm_thinkpad_ec_found)
 503                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 504                        ibm_thinkpad_ec_found);
 505
 506         return 0;
 507 }
 508
 509 static int driver_read(char *p)
 510 {
 511         int len = 0;
 512
 513         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 514         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 515
 516         return len;
 517 }
 518
 519 static int hotkey_supported;
 520 static int hotkey_mask_supported;
 521 static int hotkey_orig_status;
 522 static int hotkey_orig_mask;
 523
 524 static int hotkey_get(int *status, int *mask)
 525 {
 526         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 527                 return 0;
 528
 529         if (hotkey_mask_supported)
 530                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 531                         return 0;
 532
 533         return 1;
 534 }
 535
 536 static int hotkey_set(int status, int mask)
 537 {
 538         int i;
 539
 540         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 541                 return 0;
 542
 543         if (hotkey_mask_supported)
 544                 for (i = 0; i < 32; i++) {
 545                         int bit = ((1 << i) & mask) != 0;
 546                         if (!acpi_evalf(hkey_handle,
 547                                         NULL, "MHKM", "vdd", i + 1, bit))
 548                                 return 0;
 549                 }
 550
 551         return 1;
 552 }
 553
 554 static int hotkey_init(void)
 555 {
 556         /* hotkey not supported on 570 */
 557         hotkey_supported = hkey_handle != NULL;
 558
 559         if (hotkey_supported) {
 560                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 561                    A30, R30, R31, T20-22, X20-21, X22-24 */
 562                 hotkey_mask_supported =
 563                     acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 564
 565                 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
 566                         return -ENODEV;
 567         }
 568
 569         return 0;
 570 }
 571
 572 static int hotkey_read(char *p)
 573 {
 574         int status, mask;
 575         int len = 0;
 576
 577         if (!hotkey_supported) {
 578                 len += sprintf(p + len, "status:\t\tnot supported\n");
 579                 return len;
 580         }
 581
 582         if (!hotkey_get(&status, &mask))
 583                 return -EIO;
 584
 585         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 586         if (hotkey_mask_supported) {
 587                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 588                 len += sprintf(p + len,
 589                                "commands:\tenable, disable, reset, <mask>\n");
 590         } else {
 591                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 592                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 593         }
 594
 595         return len;
 596 }
 597
 598 static int hotkey_write(char *buf)
 599 {
 600         int status, mask;
 601         char *cmd;
 602         int do_cmd = 0;
 603
 604         if (!hotkey_supported)
 605                 return -ENODEV;
 606
 607         if (!hotkey_get(&status, &mask))
 608                 return -EIO;
 609
 610         while ((cmd = next_cmd(&buf))) {
 611                 if (strlencmp(cmd, "enable") == 0) {
 612                         status = 1;
 613                 } else if (strlencmp(cmd, "disable") == 0) {
 614                         status = 0;
 615                 } else if (strlencmp(cmd, "reset") == 0) {
 616                         status = hotkey_orig_status;
 617                         mask = hotkey_orig_mask;
 618                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 619                         /* mask set */
 620                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 621                         /* mask set */
 622                 } else
 623                         return -EINVAL;
 624                 do_cmd = 1;
 625         }
 626
 627         if (do_cmd && !hotkey_set(status, mask))
 628                 return -EIO;
 629
 630         return 0;
 631 }
 632
 633 static void hotkey_exit(void)
 634 {
 635         if (hotkey_supported)
 636                 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 637 }
 638
 639 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 640 {
 641         int hkey;
 642
 643         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 644                 acpi_bus_generate_event(ibm->device, event, hkey);
 645         else {
 646                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 647                 acpi_bus_generate_event(ibm->device, event, 0);
 648         }
 649 }
 650
 651 static int bluetooth_supported;
 652
 653 static int bluetooth_init(void)
 654 {
 655         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 656            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 657         bluetooth_supported = hkey_handle &&
 658             acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
 659
 660         return 0;
 661 }
 662
 663 static int bluetooth_status(void)
 664 {
 665         int status;
 666
 667         if (!bluetooth_supported ||
 668             !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 669                 status = 0;
 670
 671         return status;
 672 }
 673
 674 static int bluetooth_read(char *p)
 675 {
 676         int len = 0;
 677         int status = bluetooth_status();
 678
 679         if (!bluetooth_supported)
 680                 len += sprintf(p + len, "status:\t\tnot supported\n");
 681         else if (!(status & 1))
 682                 len += sprintf(p + len, "status:\t\tnot installed\n");
 683         else {
 684                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 685                 len += sprintf(p + len, "commands:\tenable, disable\n");
 686         }
 687
 688         return len;
 689 }
 690
 691 static int bluetooth_write(char *buf)
 692 {
 693         int status = bluetooth_status();
 694         char *cmd;
 695         int do_cmd = 0;
 696
 697         if (!bluetooth_supported)
 698                 return -ENODEV;
 699
 700         while ((cmd = next_cmd(&buf))) {
 701                 if (strlencmp(cmd, "enable") == 0) {
 702                         status |= 2;
 703                 } else if (strlencmp(cmd, "disable") == 0) {
 704                         status &= ~2;
 705                 } else
 706                         return -EINVAL;
 707                 do_cmd = 1;
 708         }
 709
 710         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 711                 return -EIO;
 712
 713         return 0;
 714 }
 715
 716 static int wan_supported;
 717
 718 static int wan_init(void)
 719 {
 720         wan_supported = hkey_handle &&
 721             acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
 722
 723         return 0;
 724 }
 725
 726 static int wan_status(void)
 727 {
 728         int status;
 729
 730         if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 731                 status = 0;
 732
 733         return status;
 734 }
 735
 736 static int wan_read(char *p)
 737 {
 738         int len = 0;
 739         int status = wan_status();
 740
 741         if (!wan_supported)
 742                 len += sprintf(p + len, "status:\t\tnot supported\n");
 743         else if (!(status & 1))
 744                 len += sprintf(p + len, "status:\t\tnot installed\n");
 745         else {
 746                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 747                 len += sprintf(p + len, "commands:\tenable, disable\n");
 748         }
 749
 750         return len;
 751 }
 752
 753 static int wan_write(char *buf)
 754 {
 755         int status = wan_status();
 756         char *cmd;
 757         int do_cmd = 0;
 758
 759         if (!wan_supported)
 760                 return -ENODEV;
 761
 762         while ((cmd = next_cmd(&buf))) {
 763                 if (strlencmp(cmd, "enable") == 0) {
 764                         status |= 2;
 765                 } else if (strlencmp(cmd, "disable") == 0) {
 766                         status &= ~2;
 767                 } else
 768                         return -EINVAL;
 769                 do_cmd = 1;
 770         }
 771
 772         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
 773                 return -EIO;
 774
 775         return 0;
 776 }
 777
 778 enum video_access_mode {
 779         IBMACPI_VIDEO_NONE = 0,
 780         IBMACPI_VIDEO_570,      /* 570 */
 781         IBMACPI_VIDEO_770,      /* 600e/x, 770e, 770x */
 782         IBMACPI_VIDEO_NEW,      /* all others */
 783 };
 784
 785 static enum video_access_mode video_supported;
 786 static int video_orig_autosw;
 787
 788 static int video_init(void)
 789 {
 790         int ivga;
 791
 792         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 793                 /* G41, assume IVGA doesn't change */
 794                 vid_handle = vid2_handle;
 795
 796         if (!vid_handle)
 797                 /* video switching not supported on R30, R31 */
 798                 video_supported = IBMACPI_VIDEO_NONE;
 799         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 800                 /* 570 */
 801                 video_supported = IBMACPI_VIDEO_570;
 802         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 803                 /* 600e/x, 770e, 770x */
 804                 video_supported = IBMACPI_VIDEO_770;
 805         else
 806                 /* all others */
 807                 video_supported = IBMACPI_VIDEO_NEW;
 808
 809         return 0;
 810 }
 811
 812 static int video_status(void)
 813 {
 814         int status = 0;
 815         int i;
 816
 817         if (video_supported == IBMACPI_VIDEO_570) {
 818                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
 819                         status = i & 3;
 820         } else if (video_supported == IBMACPI_VIDEO_770) {
 821                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 822                         status |= 0x01 * i;
 823                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 824                         status |= 0x02 * i;
 825         } else if (video_supported == IBMACPI_VIDEO_NEW) {
 826                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
 827                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 828                         status |= 0x02 * i;
 829
 830                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
 831                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 832                         status |= 0x01 * i;
 833                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
 834                         status |= 0x08 * i;
 835         }
 836
 837         return status;
 838 }
 839
 840 static int video_autosw(void)
 841 {
 842         int autosw = 0;
 843
 844         if (video_supported == IBMACPI_VIDEO_570)
 845                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
 846         else if (video_supported == IBMACPI_VIDEO_770 ||
 847                  video_supported == IBMACPI_VIDEO_NEW)
 848                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
 849
 850         return autosw & 1;
 851 }
 852
 853 static int video_read(char *p)
 854 {
 855         int status = video_status();
 856         int autosw = video_autosw();
 857         int len = 0;
 858
 859         if (!video_supported) {
 860                 len += sprintf(p + len, "status:\t\tnot supported\n");
 861                 return len;
 862         }
 863
 864         len += sprintf(p + len, "status:\t\tsupported\n");
 865         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
 866         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
 867         if (video_supported == IBMACPI_VIDEO_NEW)
 868                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
 869         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
 870         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
 871         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
 872         if (video_supported == IBMACPI_VIDEO_NEW)
 873                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
 874         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
 875         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
 876
 877         return len;
 878 }
 879
 880 static int video_switch(void)
 881 {
 882         int autosw = video_autosw();
 883         int ret;
 884
 885         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 886                 return -EIO;
 887         ret = video_supported == IBMACPI_VIDEO_570 ?
 888             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
 889             acpi_evalf(vid_handle, NULL, "VSWT", "v");
 890         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 891
 892         return ret;
 893 }
 894
 895 static int video_expand(void)
 896 {
 897         if (video_supported == IBMACPI_VIDEO_570)
 898                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
 899         else if (video_supported == IBMACPI_VIDEO_770)
 900                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
 901         else
 902                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
 903 }
 904
 905 static int video_switch2(int status)
 906 {
 907         int ret;
 908
 909         if (video_supported == IBMACPI_VIDEO_570) {
 910                 ret = acpi_evalf(NULL, NULL,
 911                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
 912         } else if (video_supported == IBMACPI_VIDEO_770) {
 913                 int autosw = video_autosw();
 914                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 915                         return -EIO;
 916
 917                 ret = acpi_evalf(vid_handle, NULL,
 918                                  "ASWT", "vdd", status * 0x100, 0);
 919
 920                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 921         } else {
 922                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
 923                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
 924         }
 925
 926         return ret;
 927 }
 928
 929 static int video_write(char *buf)
 930 {
 931         char *cmd;
 932         int enable, disable, status;
 933
 934         if (!video_supported)
 935                 return -ENODEV;
 936
 937         enable = disable = 0;
 938
 939         while ((cmd = next_cmd(&buf))) {
 940                 if (strlencmp(cmd, "lcd_enable") == 0) {
 941                         enable |= 0x01;
 942                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
 943                         disable |= 0x01;
 944                 } else if (strlencmp(cmd, "crt_enable") == 0) {
 945                         enable |= 0x02;
 946                 } else if (strlencmp(cmd, "crt_disable") == 0) {
 947                         disable |= 0x02;
 948                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 949                            strlencmp(cmd, "dvi_enable") == 0) {
 950                         enable |= 0x08;
 951                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 952                            strlencmp(cmd, "dvi_disable") == 0) {
 953                         disable |= 0x08;
 954                 } else if (strlencmp(cmd, "auto_enable") == 0) {
 955                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 956                                 return -EIO;
 957                 } else if (strlencmp(cmd, "auto_disable") == 0) {
 958                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
 959                                 return -EIO;
 960                 } else if (strlencmp(cmd, "video_switch") == 0) {
 961                         if (!video_switch())
 962                                 return -EIO;
 963                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
 964                         if (!video_expand())
 965                                 return -EIO;
 966                 } else
 967                         return -EINVAL;
 968         }
 969
 970         if (enable || disable) {
 971                 status = (video_status() & 0x0f & ~disable) | enable;
 972                 if (!video_switch2(status))
 973                         return -EIO;
 974         }
 975
 976         return 0;
 977 }
 978
 979 static void video_exit(void)
 980 {
 981         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
 982 }
 983
 984 static int light_supported;
 985 static int light_status_supported;
 986
 987 static int light_init(void)
 988 {
 989         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
 990         light_supported = (cmos_handle || lght_handle) && !ledb_handle;
 991
 992         if (light_supported)
 993                 /* light status not supported on
 994                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
 995                 light_status_supported = acpi_evalf(ec_handle, NULL,
 996                                                     "KBLT", "qv");
 997
 998         return 0;
 999 }
1000
1001 static int light_read(char *p)
1002 {
1003         int len = 0;
1004         int status = 0;
1005
1006         if (!light_supported) {
1007                 len += sprintf(p + len, "status:\t\tnot supported\n");
1008         } else if (!light_status_supported) {
1009                 len += sprintf(p + len, "status:\t\tunknown\n");
1010                 len += sprintf(p + len, "commands:\ton, off\n");
1011         } else {
1012                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1013                         return -EIO;
1014                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1015                 len += sprintf(p + len, "commands:\ton, off\n");
1016         }
1017
1018         return len;
1019 }
1020
1021 static int light_write(char *buf)
1022 {
1023         int cmos_cmd, lght_cmd;
1024         char *cmd;
1025         int success;
1026
1027         if (!light_supported)
1028                 return -ENODEV;
1029
1030         while ((cmd = next_cmd(&buf))) {
1031                 if (strlencmp(cmd, "on") == 0) {
1032                         cmos_cmd = 0x0c;
1033                         lght_cmd = 1;
1034                 } else if (strlencmp(cmd, "off") == 0) {
1035                         cmos_cmd = 0x0d;
1036                         lght_cmd = 0;
1037                 } else
1038                         return -EINVAL;
1039
1040                 success = cmos_handle ?
1041                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1042                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1043                 if (!success)
1044                         return -EIO;
1045         }
1046
1047         return 0;
1048 }
1049
1050 #if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY)
1051 static int _sta(acpi_handle handle)
1052 {
1053         int status;
1054
1055         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
1056                 status = 0;
1057
1058         return status;
1059 }
1060 #endif
1061
1062 #ifdef CONFIG_ACPI_IBM_DOCK
1063 #define dock_docked() (_sta(dock_handle) & 1)
1064
1065 static int dock_read(char *p)
1066 {
1067         int len = 0;
1068         int docked = dock_docked();
1069
1070         if (!dock_handle)
1071                 len += sprintf(p + len, "status:\t\tnot supported\n");
1072         else if (!docked)
1073                 len += sprintf(p + len, "status:\t\tundocked\n");
1074         else {
1075                 len += sprintf(p + len, "status:\t\tdocked\n");
1076                 len += sprintf(p + len, "commands:\tdock, undock\n");
1077         }
1078
1079         return len;
1080 }
1081
1082 static int dock_write(char *buf)
1083 {
1084         char *cmd;
1085
1086         if (!dock_docked())
1087                 return -ENODEV;
1088
1089         while ((cmd = next_cmd(&buf))) {
1090                 if (strlencmp(cmd, "undock") == 0) {
1091                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1092                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1093                                 return -EIO;
1094                 } else if (strlencmp(cmd, "dock") == 0) {
1095                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1096                                 return -EIO;
1097                 } else
1098                         return -EINVAL;
1099         }
1100
1101         return 0;
1102 }
1103
1104 static void dock_notify(struct ibm_struct *ibm, u32 event)
1105 {
1106         int docked = dock_docked();
1107         int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1108
1109         if (event == 1 && !pci) /* 570 */
1110                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1111         else if (event == 1 && pci)     /* 570 */
1112                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1113         else if (event == 3 && docked)
1114                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1115         else if (event == 3 && !docked)
1116                 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1117         else if (event == 0 && docked)
1118                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1119         else {
1120                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1121                        event, _sta(dock_handle));
1122                 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1123         }
1124 }
1125 #endif
1126
1127 #ifdef CONFIG_ACPI_IBM_BAY
1128 static int bay_status_supported;
1129 static int bay_status2_supported;
1130 static int bay_eject_supported;
1131 static int bay_eject2_supported;
1132
1133 static int bay_init(void)
1134 {
1135         bay_status_supported = bay_handle &&
1136             acpi_evalf(bay_handle, NULL, "_STA", "qv");
1137         bay_status2_supported = bay2_handle &&
1138             acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1139
1140         bay_eject_supported = bay_handle && bay_ej_handle &&
1141             (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1142         bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1143             (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1144
1145         return 0;
1146 }
1147
1148 #define bay_occupied(b) (_sta(b##_handle) & 1)
1149
1150 static int bay_read(char *p)
1151 {
1152         int len = 0;
1153         int occupied = bay_occupied(bay);
1154         int occupied2 = bay_occupied(bay2);
1155         int eject, eject2;
1156
1157         len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1158                        (occupied ? "occupied" : "unoccupied") :
1159                        "not supported");
1160         if (bay_status2_supported)
1161                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1162                                "occupied" : "unoccupied");
1163
1164         eject = bay_eject_supported && occupied;
1165         eject2 = bay_eject2_supported && occupied2;
1166
1167         if (eject && eject2)
1168                 len += sprintf(p + len, "commands:\teject, eject2\n");
1169         else if (eject)
1170                 len += sprintf(p + len, "commands:\teject\n");
1171         else if (eject2)
1172                 len += sprintf(p + len, "commands:\teject2\n");
1173
1174         return len;
1175 }
1176
1177 static int bay_write(char *buf)
1178 {
1179         char *cmd;
1180
1181         if (!bay_eject_supported && !bay_eject2_supported)
1182                 return -ENODEV;
1183
1184         while ((cmd = next_cmd(&buf))) {
1185                 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1186                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1187                                 return -EIO;
1188                 } else if (bay_eject2_supported &&
1189                            strlencmp(cmd, "eject2") == 0) {
1190                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1191                                 return -EIO;
1192                 } else
1193                         return -EINVAL;
1194         }
1195
1196         return 0;
1197 }
1198
1199 static void bay_notify(struct ibm_struct *ibm, u32 event)
1200 {
1201         acpi_bus_generate_event(ibm->device, event, 0);
1202 }
1203 #endif /* CONFIG_ACPI_IBM_BAY */
1204
1205 static int cmos_read(char *p)
1206 {
1207         int len = 0;
1208
1209         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1210            R30, R31, T20-22, X20-21 */
1211         if (!cmos_handle)
1212                 len += sprintf(p + len, "status:\t\tnot supported\n");
1213         else {
1214                 len += sprintf(p + len, "status:\t\tsupported\n");
1215                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1216         }
1217
1218         return len;
1219 }
1220
1221 static int cmos_eval(int cmos_cmd)
1222 {
1223         if (cmos_handle)
1224                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1225         else
1226                 return 1;
1227 }
1228
1229 static int cmos_write(char *buf)
1230 {
1231         char *cmd;
1232         int cmos_cmd;
1233
1234         if (!cmos_handle)
1235                 return -EINVAL;
1236
1237         while ((cmd = next_cmd(&buf))) {
1238                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1239                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1240                         /* cmos_cmd set */
1241                 } else
1242                         return -EINVAL;
1243
1244                 if (!cmos_eval(cmos_cmd))
1245                         return -EIO;
1246         }
1247
1248         return 0;
1249 }
1250
1251 enum led_access_mode {
1252         IBMACPI_LED_NONE = 0,
1253         IBMACPI_LED_570,        /* 570 */
1254         IBMACPI_LED_OLD,        /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1255         IBMACPI_LED_NEW,        /* all others */
1256 };
1257 static enum led_access_mode led_supported;
1258
1259 static int led_init(void)
1260 {
1261         if (!led_handle)
1262                 /* led not supported on R30, R31 */
1263                 led_supported = IBMACPI_LED_NONE;
1264         else if (strlencmp(led_path, "SLED") == 0)
1265                 /* 570 */
1266                 led_supported = IBMACPI_LED_570;
1267         else if (strlencmp(led_path, "SYSL") == 0)
1268                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1269                 led_supported = IBMACPI_LED_OLD;
1270         else
1271                 /* all others */
1272                 led_supported = IBMACPI_LED_NEW;
1273
1274         return 0;
1275 }
1276
1277 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1278
1279 static int led_read(char *p)
1280 {
1281         int len = 0;
1282
1283         if (!led_supported) {
1284                 len += sprintf(p + len, "status:\t\tnot supported\n");
1285                 return len;
1286         }
1287         len += sprintf(p + len, "status:\t\tsupported\n");
1288
1289         if (led_supported == IBMACPI_LED_570) {
1290                 /* 570 */
1291                 int i, status;
1292                 for (i = 0; i < 8; i++) {
1293                         if (!acpi_evalf(ec_handle,
1294                                         &status, "GLED", "dd", 1 << i))
1295                                 return -EIO;
1296                         len += sprintf(p + len, "%d:\t\t%s\n",
1297                                        i, led_status(status));
1298                 }
1299         }
1300
1301         len += sprintf(p + len, "commands:\t"
1302                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1303
1304         return len;
1305 }
1306
1307 /* off, on, blink */
1308 static const int led_sled_arg1[] = { 0, 1, 3 };
1309 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1310 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1311 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1312
1313 #define EC_HLCL 0x0c
1314 #define EC_HLBL 0x0d
1315 #define EC_HLMS 0x0e
1316
1317 static int led_write(char *buf)
1318 {
1319         char *cmd;
1320         int led, ind, ret;
1321
1322         if (!led_supported)
1323                 return -ENODEV;
1324
1325         while ((cmd = next_cmd(&buf))) {
1326                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1327                         return -EINVAL;
1328
1329                 if (strstr(cmd, "off")) {
1330                         ind = 0;
1331                 } else if (strstr(cmd, "on")) {
1332                         ind = 1;
1333                 } else if (strstr(cmd, "blink")) {
1334                         ind = 2;
1335                 } else
1336                         return -EINVAL;
1337
1338                 if (led_supported == IBMACPI_LED_570) {
1339                         /* 570 */
1340                         led = 1 << led;
1341                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1342                                         led, led_sled_arg1[ind]))
1343                                 return -EIO;
1344                 } else if (led_supported == IBMACPI_LED_OLD) {
1345                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1346                         led = 1 << led;
1347                         ret = ec_write(EC_HLMS, led);
1348                         if (ret >= 0)
1349                                 ret =
1350                                     ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1351                         if (ret >= 0)
1352                                 ret =
1353                                     ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1354                         if (ret < 0)
1355                                 return ret;
1356                 } else {
1357                         /* all others */
1358                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1359                                         led, led_led_arg1[ind]))
1360                                 return -EIO;
1361                 }
1362         }
1363
1364         return 0;
1365 }
1366
1367 static int beep_read(char *p)
1368 {
1369         int len = 0;
1370
1371         if (!beep_handle)
1372                 len += sprintf(p + len, "status:\t\tnot supported\n");
1373         else {
1374                 len += sprintf(p + len, "status:\t\tsupported\n");
1375                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1376         }
1377
1378         return len;
1379 }
1380
1381 static int beep_write(char *buf)
1382 {
1383         char *cmd;
1384         int beep_cmd;
1385
1386         if (!beep_handle)
1387                 return -ENODEV;
1388
1389         while ((cmd = next_cmd(&buf))) {
1390                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1391                     beep_cmd >= 0 && beep_cmd <= 17) {
1392                         /* beep_cmd set */
1393                 } else
1394                         return -EINVAL;
1395                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1396                         return -EIO;
1397         }
1398
1399         return 0;
1400 }
1401
1402 static int acpi_ec_read(int i, u8 * p)
1403 {
1404         int v;
1405
1406         if (ecrd_handle) {
1407                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1408                         return 0;
1409                 *p = v;
1410         } else {
1411                 if (ec_read(i, p) < 0)
1412                         return 0;
1413         }
1414
1415         return 1;
1416 }
1417
1418 static int acpi_ec_write(int i, u8 v)
1419 {
1420         if (ecwr_handle) {
1421                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1422                         return 0;
1423         } else {
1424                 if (ec_write(i, v) < 0)
1425                         return 0;
1426         }
1427
1428         return 1;
1429 }
1430
1431 static enum thermal_access_mode thermal_read_mode;
1432
1433 static int thermal_init(void)
1434 {
1435         u8 t, ta1, ta2;
1436         int i;
1437         int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1438
1439         if (ibm_thinkpad_ec_found && experimental) {
1440                 /*
1441                  * Direct EC access mode: sensors at registers
1442                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
1443                  * non-implemented, thermal sensors return 0x80 when
1444                  * not available
1445                  */
1446
1447                 ta1 = ta2 = 0;
1448                 for (i = 0; i < 8; i++) {
1449                         if (likely(acpi_ec_read(0x78 + i, &t))) {
1450                                 ta1 |= t;
1451                         } else {
1452                                 ta1 = 0;
1453                                 break;
1454                         }
1455                         if (likely(acpi_ec_read(0xC0 + i, &t))) {
1456                                 ta2 |= t;
1457                         } else {
1458                                 ta1 = 0;
1459                                 break;
1460                         }
1461                 }
1462                 if (ta1 == 0) {
1463                         /* This is sheer paranoia, but we handle it anyway */
1464                         if (acpi_tmp7) {
1465                                 printk(IBM_ERR
1466                                        "ThinkPad ACPI EC access misbehaving, "
1467                                        "falling back to ACPI TMPx access mode\n");
1468                                 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1469                         } else {
1470                                 printk(IBM_ERR
1471                                        "ThinkPad ACPI EC access misbehaving, "
1472                                        "disabling thermal sensors access\n");
1473                                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1474                         }
1475                 } else {
1476                         thermal_read_mode =
1477                             (ta2 != 0) ?
1478                             IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1479                 }
1480         } else if (acpi_tmp7) {
1481                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1482                         /* 600e/x, 770e, 770x */
1483                         thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1484                 } else {
1485                         /* Standard ACPI TMPx access, max 8 sensors */
1486                         thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1487                 }
1488         } else {
1489                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1490                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1491         }
1492
1493         return 0;
1494 }
1495
1496 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1497 {
1498         int i, t;
1499         s8 tmp;
1500         char tmpi[] = "TMPi";
1501
1502         if (!s)
1503                 return -EINVAL;
1504
1505         switch (thermal_read_mode) {
1506 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1507         case IBMACPI_THERMAL_TPEC_16:
1508                 for (i = 0; i < 8; i++) {
1509                         if (!acpi_ec_read(0xC0 + i, &tmp))
1510                                 return -EIO;
1511                         s->temp[i + 8] = tmp * 1000;
1512                 }
1513                 /* fallthrough */
1514 #endif
1515         case IBMACPI_THERMAL_TPEC_8:
1516                 for (i = 0; i < 8; i++) {
1517                         if (!acpi_ec_read(0x78 + i, &tmp))
1518                                 return -EIO;
1519                         s->temp[i] = tmp * 1000;
1520                 }
1521                 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1522
1523         case IBMACPI_THERMAL_ACPI_UPDT:
1524                 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1525                         return -EIO;
1526                 for (i = 0; i < 8; i++) {
1527                         tmpi[3] = '0' + i;
1528                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1529                                 return -EIO;
1530                         s->temp[i] = (t - 2732) * 100;
1531                 }
1532                 return 8;
1533
1534         case IBMACPI_THERMAL_ACPI_TMP07:
1535                 for (i = 0; i < 8; i++) {
1536                         tmpi[3] = '0' + i;
1537                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1538                                 return -EIO;
1539                         s->temp[i] = t * 1000;
1540                 }
1541                 return 8;
1542
1543         case IBMACPI_THERMAL_NONE:
1544         default:
1545                 return 0;
1546         }
1547 }
1548
1549 static int thermal_read(char *p)
1550 {
1551         int len = 0;
1552         int n, i;
1553         struct ibm_thermal_sensors_struct t;
1554
1555         n = thermal_get_sensors(&t);
1556         if (unlikely(n < 0))
1557                 return n;
1558
1559         len += sprintf(p + len, "temperatures:\t");
1560
1561         if (n > 0) {
1562                 for (i = 0; i < (n - 1); i++)
1563                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1564                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1565         } else
1566                 len += sprintf(p + len, "not supported\n");
1567
1568         return len;
1569 }
1570
1571 static u8 ecdump_regs[256];
1572
1573 static int ecdump_read(char *p)
1574 {
1575         int len = 0;
1576         int i, j;
1577         u8 v;
1578
1579         len += sprintf(p + len, "EC      "
1580                        " +00 +01 +02 +03 +04 +05 +06 +07"
1581                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1582         for (i = 0; i < 256; i += 16) {
1583                 len += sprintf(p + len, "EC 0x%02x:", i);
1584                 for (j = 0; j < 16; j++) {
1585                         if (!acpi_ec_read(i + j, &v))
1586                                 break;
1587                         if (v != ecdump_regs[i + j])
1588                                 len += sprintf(p + len, " *%02x", v);
1589                         else
1590                                 len += sprintf(p + len, "  %02x", v);
1591                         ecdump_regs[i + j] = v;
1592                 }
1593                 len += sprintf(p + len, "\n");
1594                 if (j != 16)
1595                         break;
1596         }
1597
1598         /* These are way too dangerous to advertise openly... */
1599 #if 0
1600         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1601                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1602         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1603                        " (<offset> is 00-ff, <value> is 0-255)\n");
1604 #endif
1605         return len;
1606 }
1607
1608 static int ecdump_write(char *buf)
1609 {
1610         char *cmd;
1611         int i, v;
1612
1613         while ((cmd = next_cmd(&buf))) {
1614                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1615                         /* i and v set */
1616                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1617                         /* i and v set */
1618                 } else
1619                         return -EINVAL;
1620                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1621                         if (!acpi_ec_write(i, v))
1622                                 return -EIO;
1623                 } else
1624                         return -EINVAL;
1625         }
1626
1627         return 0;
1628 }
1629
1630 static int brightness_offset = 0x31;
1631
1632 static int brightness_get(struct backlight_device *bd)
1633 {
1634         u8 level;
1635         if (!acpi_ec_read(brightness_offset, &level))
1636                 return -EIO;
1637
1638         level &= 0x7;
1639
1640         return level;
1641 }
1642
1643 static int brightness_read(char *p)
1644 {
1645         int len = 0;
1646         int level;
1647
1648         if ((level = brightness_get(NULL)) < 0) {
1649                 len += sprintf(p + len, "level:\t\tunreadable\n");
1650         } else {
1651                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1652                 len += sprintf(p + len, "commands:\tup, down\n");
1653                 len += sprintf(p + len, "commands:\tlevel <level>"
1654                                " (<level> is 0-7)\n");
1655         }
1656
1657         return len;
1658 }
1659
1660 #define BRIGHTNESS_UP   4
1661 #define BRIGHTNESS_DOWN 5
1662
1663 static int brightness_set(int value)
1664 {
1665         int cmos_cmd, inc, i;
1666         int current_value = brightness_get(NULL);
1667
1668         value &= 7;
1669
1670         cmos_cmd = value > current_value ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1671         inc = value > current_value ? 1 : -1;
1672         for (i = current_value; i != value; i += inc) {
1673                 if (!cmos_eval(cmos_cmd))
1674                         return -EIO;
1675                 if (!acpi_ec_write(brightness_offset, i + inc))
1676                         return -EIO;
1677         }
1678
1679         return 0;
1680 }
1681
1682 static int brightness_write(char *buf)
1683 {
1684         int level;
1685         int new_level;
1686         char *cmd;
1687
1688         while ((cmd = next_cmd(&buf))) {
1689                 if ((level = brightness_get(NULL)) < 0)
1690                         return level;
1691                 level &= 7;
1692
1693                 if (strlencmp(cmd, "up") == 0) {
1694                         new_level = level == 7 ? 7 : level + 1;
1695                 } else if (strlencmp(cmd, "down") == 0) {
1696                         new_level = level == 0 ? 0 : level - 1;
1697                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1698                            new_level >= 0 && new_level <= 7) {
1699                         /* new_level set */
1700                 } else
1701                         return -EINVAL;
1702
1703                 brightness_set(new_level);
1704         }
1705
1706         return 0;
1707 }
1708
1709 static int brightness_update_status(struct backlight_device *bd)
1710 {
1711         return brightness_set(
1712                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1713                  bd->props.power == FB_BLANK_UNBLANK) ?
1714                                 bd->props.brightness : 0);
1715 }
1716
1717 static struct backlight_ops ibm_backlight_data = {
1718         .get_brightness = brightness_get,
1719         .update_status  = brightness_update_status,
1720 };
1721
1722 static int brightness_init(void)
1723 {
1724         int b;
1725
1726         b = brightness_get(NULL);
1727         if (b < 0)
1728                 return b;
1729
1730         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1731                                                          &ibm_backlight_data);
1732         if (IS_ERR(ibm_backlight_device)) {
1733                 printk(IBM_ERR "Could not register backlight device\n");
1734                 return PTR_ERR(ibm_backlight_device);
1735         }
1736
1737         ibm_backlight_device->props.max_brightness = 7;
1738         ibm_backlight_device->props.brightness = b;
1739         backlight_update_status(ibm_backlight_device);
1740
1741         return 0;
1742 }
1743
1744 static void brightness_exit(void)
1745 {
1746         if (ibm_backlight_device) {
1747                 backlight_device_unregister(ibm_backlight_device);
1748                 ibm_backlight_device = NULL;
1749         }
1750 }
1751
1752 static int volume_offset = 0x30;
1753
1754 static int volume_read(char *p)
1755 {
1756         int len = 0;
1757         u8 level;
1758
1759         if (!acpi_ec_read(volume_offset, &level)) {
1760                 len += sprintf(p + len, "level:\t\tunreadable\n");
1761         } else {
1762                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1763                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1764                 len += sprintf(p + len, "commands:\tup, down, mute\n");
1765                 len += sprintf(p + len, "commands:\tlevel <level>"
1766                                " (<level> is 0-15)\n");
1767         }
1768
1769         return len;
1770 }
1771
1772 #define VOLUME_DOWN     0
1773 #define VOLUME_UP       1
1774 #define VOLUME_MUTE     2
1775
1776 static int volume_write(char *buf)
1777 {
1778         int cmos_cmd, inc, i;
1779         u8 level, mute;
1780         int new_level, new_mute;
1781         char *cmd;
1782
1783         while ((cmd = next_cmd(&buf))) {
1784                 if (!acpi_ec_read(volume_offset, &level))
1785                         return -EIO;
1786                 new_mute = mute = level & 0x40;
1787                 new_level = level = level & 0xf;
1788
1789                 if (strlencmp(cmd, "up") == 0) {
1790                         if (mute)
1791                                 new_mute = 0;
1792                         else
1793                                 new_level = level == 15 ? 15 : level + 1;
1794                 } else if (strlencmp(cmd, "down") == 0) {
1795                         if (mute)
1796                                 new_mute = 0;
1797                         else
1798                                 new_level = level == 0 ? 0 : level - 1;
1799                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1800                            new_level >= 0 && new_level <= 15) {
1801                         /* new_level set */
1802                 } else if (strlencmp(cmd, "mute") == 0) {
1803                         new_mute = 0x40;
1804                 } else
1805                         return -EINVAL;
1806
1807                 if (new_level != level) {       /* mute doesn't change */
1808                         cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1809                         inc = new_level > level ? 1 : -1;
1810
1811                         if (mute && (!cmos_eval(cmos_cmd) ||
1812                                      !acpi_ec_write(volume_offset, level)))
1813                                 return -EIO;
1814
1815                         for (i = level; i != new_level; i += inc)
1816                                 if (!cmos_eval(cmos_cmd) ||
1817                                     !acpi_ec_write(volume_offset, i + inc))
1818                                         return -EIO;
1819
1820                         if (mute && (!cmos_eval(VOLUME_MUTE) ||
1821                                      !acpi_ec_write(volume_offset,
1822                                                     new_level + mute)))
1823                                 return -EIO;
1824                 }
1825
1826                 if (new_mute != mute) { /* level doesn't change */
1827                         cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1828
1829                         if (!cmos_eval(cmos_cmd) ||
1830                             !acpi_ec_write(volume_offset, level + new_mute))
1831                                 return -EIO;
1832                 }
1833         }
1834
1835         return 0;
1836 }
1837
1838 static enum fan_status_access_mode fan_status_access_mode;
1839 static enum fan_control_access_mode fan_control_access_mode;
1840 static enum fan_control_commands fan_control_commands;
1841
1842 static int fan_control_status_known;
1843 static u8 fan_control_initial_status;
1844
1845 static void fan_watchdog_fire(struct work_struct *ignored);
1846 static int fan_watchdog_maxinterval;
1847 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1848
1849 static int fan_init(void)
1850 {
1851         fan_status_access_mode = IBMACPI_FAN_NONE;
1852         fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1853         fan_control_commands = 0;
1854         fan_control_status_known = 1;
1855         fan_watchdog_maxinterval = 0;
1856
1857         if (gfan_handle) {
1858                 /* 570, 600e/x, 770e, 770x */
1859                 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1860         } else {
1861                 /* all other ThinkPads: note that even old-style
1862                  * ThinkPad ECs supports the fan control register */
1863                 if (likely(acpi_ec_read(fan_status_offset,
1864                                         &fan_control_initial_status))) {
1865                         fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1866
1867                         /* In some ThinkPads, neither the EC nor the ACPI
1868                          * DSDT initialize the fan status, and it ends up
1869                          * being set to 0x07 when it *could* be either
1870                          * 0x07 or 0x80.
1871                          *
1872                          * Enable for TP-1Y (T43), TP-78 (R51e),
1873                          * TP-76 (R52), TP-70 (T43, R52), which are known
1874                          * to be buggy. */
1875                         if (fan_control_initial_status == 0x07 &&
1876                             ibm_thinkpad_ec_found &&
1877                             ((ibm_thinkpad_ec_found[0] == '1' &&
1878                               ibm_thinkpad_ec_found[1] == 'Y') ||
1879                              (ibm_thinkpad_ec_found[0] == '7' &&
1880                               (ibm_thinkpad_ec_found[1] == '6' ||
1881                                ibm_thinkpad_ec_found[1] == '8' ||
1882                                ibm_thinkpad_ec_found[1] == '0'))
1883                             )) {
1884                                 printk(IBM_NOTICE
1885                                        "fan_init: initial fan status is "
1886                                        "unknown, assuming it is in auto "
1887                                        "mode\n");
1888                                 fan_control_status_known = 0;
1889                         }
1890                 } else {
1891                         printk(IBM_ERR
1892                                "ThinkPad ACPI EC access misbehaving, "
1893                                "fan status and control unavailable\n");
1894                         return 0;
1895                 }
1896         }
1897
1898         if (sfan_handle) {
1899                 /* 570, 770x-JL */
1900                 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
1901                 fan_control_commands |=
1902                     IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
1903         } else {
1904                 if (!gfan_handle) {
1905                         /* gfan without sfan means no fan control */
1906                         /* all other models implement TP EC 0x2f control */
1907
1908                         if (fans_handle) {
1909                                 /* X31, X40, X41 */
1910                                 fan_control_access_mode =
1911                                     IBMACPI_FAN_WR_ACPI_FANS;
1912                                 fan_control_commands |=
1913                                     IBMACPI_FAN_CMD_SPEED |
1914                                     IBMACPI_FAN_CMD_LEVEL |
1915                                     IBMACPI_FAN_CMD_ENABLE;
1916                         } else {
1917                                 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
1918                                 fan_control_commands |=
1919                                     IBMACPI_FAN_CMD_LEVEL |
1920                                     IBMACPI_FAN_CMD_ENABLE;
1921                         }
1922                 }
1923         }
1924
1925         return 0;
1926 }
1927
1928 static int fan_get_status(u8 *status)
1929 {
1930         u8 s;
1931
1932         /* TODO:
1933          * Add IBMACPI_FAN_RD_ACPI_FANS ? */
1934
1935         switch (fan_status_access_mode) {
1936         case IBMACPI_FAN_RD_ACPI_GFAN:
1937                 /* 570, 600e/x, 770e, 770x */
1938
1939                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
1940                         return -EIO;
1941
1942                 if (likely(status))
1943                         *status = s & 0x07;
1944
1945                 break;
1946
1947         case IBMACPI_FAN_RD_TPEC:
1948                 /* all except 570, 600e/x, 770e, 770x */
1949                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
1950                         return -EIO;
1951
1952                 if (likely(status))
1953                         *status = s;
1954
1955                 break;
1956
1957         default:
1958                 return -ENXIO;
1959         }
1960
1961         return 0;
1962 }
1963
1964 static int fan_get_speed(unsigned int *speed)
1965 {
1966         u8 hi, lo;
1967
1968         switch (fan_status_access_mode) {
1969         case IBMACPI_FAN_RD_TPEC:
1970                 /* all except 570, 600e/x, 770e, 770x */
1971                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
1972                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
1973                         return -EIO;
1974
1975                 if (likely(speed))
1976                         *speed = (hi << 8) | lo;
1977
1978                 break;
1979
1980         default:
1981                 return -ENXIO;
1982         }
1983
1984         return 0;
1985 }
1986
1987 static void fan_exit(void)
1988 {
1989         cancel_delayed_work(&fan_watchdog_task);
1990         flush_scheduled_work();
1991 }
1992
1993 static void fan_watchdog_reset(void)
1994 {
1995         static int fan_watchdog_active = 0;
1996
1997         if (fan_watchdog_active)
1998                 cancel_delayed_work(&fan_watchdog_task);
1999
2000         if (fan_watchdog_maxinterval > 0) {
2001                 fan_watchdog_active = 1;
2002                 if (!schedule_delayed_work(&fan_watchdog_task,
2003                                 msecs_to_jiffies(fan_watchdog_maxinterval
2004                                                  * 1000))) {
2005                         printk(IBM_ERR "failed to schedule the fan watchdog, "
2006                                "watchdog will not trigger\n");
2007                 }
2008         } else
2009                 fan_watchdog_active = 0;
2010 }
2011
2012 static int fan_read(char *p)
2013 {
2014         int len = 0;
2015         int rc;
2016         u8 status;
2017         unsigned int speed = 0;
2018
2019         switch (fan_status_access_mode) {
2020         case IBMACPI_FAN_RD_ACPI_GFAN:
2021                 /* 570, 600e/x, 770e, 770x */
2022                 if ((rc = fan_get_status(&status)) < 0)
2023                         return rc;
2024
2025                 len += sprintf(p + len, "status:\t\t%s\n"
2026                                "level:\t\t%d\n",
2027                                (status != 0) ? "enabled" : "disabled", status);
2028                 break;
2029
2030         case IBMACPI_FAN_RD_TPEC:
2031                 /* all except 570, 600e/x, 770e, 770x */
2032                 if ((rc = fan_get_status(&status)) < 0)
2033                         return rc;
2034
2035                 if (unlikely(!fan_control_status_known)) {
2036                         if (status != fan_control_initial_status)
2037                                 fan_control_status_known = 1;
2038                         else
2039                                 /* Return most likely status. In fact, it
2040                                  * might be the only possible status */
2041                                 status = IBMACPI_FAN_EC_AUTO;
2042                 }
2043
2044                 len += sprintf(p + len, "status:\t\t%s\n",
2045                                (status != 0) ? "enabled" : "disabled");
2046
2047                 /* No ThinkPad boots on disengaged mode, we can safely
2048                  * assume the tachometer is online if fan control status
2049                  * was unknown */
2050                 if ((rc = fan_get_speed(&speed)) < 0)
2051                         return rc;
2052
2053                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2054
2055                 if (status & IBMACPI_FAN_EC_DISENGAGED)
2056                         /* Disengaged mode takes precedence */
2057                         len += sprintf(p + len, "level:\t\tdisengaged\n");
2058                 else if (status & IBMACPI_FAN_EC_AUTO)
2059                         len += sprintf(p + len, "level:\t\tauto\n");
2060                 else
2061                         len += sprintf(p + len, "level:\t\t%d\n", status);
2062                 break;
2063
2064         case IBMACPI_FAN_NONE:
2065         default:
2066                 len += sprintf(p + len, "status:\t\tnot supported\n");
2067         }
2068
2069         if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2070                 len += sprintf(p + len, "commands:\tlevel <level>");
2071
2072                 switch (fan_control_access_mode) {
2073                 case IBMACPI_FAN_WR_ACPI_SFAN:
2074                         len += sprintf(p + len, " (<level> is 0-7)\n");
2075                         break;
2076
2077                 default:
2078                         len += sprintf(p + len, " (<level> is 0-7, "
2079                                        "auto, disengaged)\n");
2080                         break;
2081                 }
2082         }
2083
2084         if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2085                 len += sprintf(p + len, "commands:\tenable, disable\n"
2086                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2087                                "1-120 (seconds))\n");
2088
2089         if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2090                 len += sprintf(p + len, "commands:\tspeed <speed>"
2091                                " (<speed> is 0-65535)\n");
2092
2093         return len;
2094 }
2095
2096 static int fan_set_level(int level)
2097 {
2098         switch (fan_control_access_mode) {
2099         case IBMACPI_FAN_WR_ACPI_SFAN:
2100                 if (level >= 0 && level <= 7) {
2101                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2102                                 return -EIO;
2103                 } else
2104                         return -EINVAL;
2105                 break;
2106
2107         case IBMACPI_FAN_WR_ACPI_FANS:
2108         case IBMACPI_FAN_WR_TPEC:
2109                 if ((level != IBMACPI_FAN_EC_AUTO) &&
2110                     (level != IBMACPI_FAN_EC_DISENGAGED) &&
2111                     ((level < 0) || (level > 7)))
2112                         return -EINVAL;
2113
2114                 if (!acpi_ec_write(fan_status_offset, level))
2115                         return -EIO;
2116                 else
2117                         fan_control_status_known = 1;
2118                 break;
2119
2120         default:
2121                 return -ENXIO;
2122         }
2123         return 0;
2124 }
2125
2126 static int fan_set_enable(void)
2127 {
2128         u8 s;
2129         int rc;
2130
2131         switch (fan_control_access_mode) {
2132         case IBMACPI_FAN_WR_ACPI_FANS:
2133         case IBMACPI_FAN_WR_TPEC:
2134                 if ((rc = fan_get_status(&s)) < 0)
2135                         return rc;
2136
2137                 /* Don't go out of emergency fan mode */
2138                 if (s != 7)
2139                         s = IBMACPI_FAN_EC_AUTO;
2140
2141                 if (!acpi_ec_write(fan_status_offset, s))
2142                         return -EIO;
2143                 else
2144                         fan_control_status_known = 1;
2145                 break;
2146
2147         case IBMACPI_FAN_WR_ACPI_SFAN:
2148                 if ((rc = fan_get_status(&s)) < 0)
2149                         return rc;
2150
2151                 s &= 0x07;
2152
2153                 /* Set fan to at least level 4 */
2154                 if (s < 4)
2155                         s = 4;
2156
2157                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2158                         return -EIO;
2159                 break;
2160
2161         default:
2162                 return -ENXIO;
2163         }
2164         return 0;
2165 }
2166
2167 static int fan_set_disable(void)
2168 {
2169         switch (fan_control_access_mode) {
2170         case IBMACPI_FAN_WR_ACPI_FANS:
2171         case IBMACPI_FAN_WR_TPEC:
2172                 if (!acpi_ec_write(fan_status_offset, 0x00))
2173                         return -EIO;
2174                 else
2175                         fan_control_status_known = 1;
2176                 break;
2177
2178         case IBMACPI_FAN_WR_ACPI_SFAN:
2179                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2180                         return -EIO;
2181                 break;
2182
2183         default:
2184                 return -ENXIO;
2185         }
2186         return 0;
2187 }
2188
2189 static int fan_set_speed(int speed)
2190 {
2191         switch (fan_control_access_mode) {
2192         case IBMACPI_FAN_WR_ACPI_FANS:
2193                 if (speed >= 0 && speed <= 65535) {
2194                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2195                                         speed, speed, speed))
2196                                 return -EIO;
2197                 } else
2198                         return -EINVAL;
2199                 break;
2200
2201         default:
2202                 return -ENXIO;
2203         }
2204         return 0;
2205 }
2206
2207 static int fan_write_cmd_level(const char *cmd, int *rc)
2208 {
2209         int level;
2210
2211         if (strlencmp(cmd, "level auto") == 0)
2212                 level = IBMACPI_FAN_EC_AUTO;
2213         else if (strlencmp(cmd, "level disengaged") == 0)
2214                 level = IBMACPI_FAN_EC_DISENGAGED;
2215         else if (sscanf(cmd, "level %d", &level) != 1)
2216                 return 0;
2217
2218         if ((*rc = fan_set_level(level)) == -ENXIO)
2219                 printk(IBM_ERR "level command accepted for unsupported "
2220                        "access mode %d", fan_control_access_mode);
2221
2222         return 1;
2223 }
2224
2225 static int fan_write_cmd_enable(const char *cmd, int *rc)
2226 {
2227         if (strlencmp(cmd, "enable") != 0)
2228                 return 0;
2229
2230         if ((*rc = fan_set_enable()) == -ENXIO)
2231                 printk(IBM_ERR "enable command accepted for unsupported "
2232                        "access mode %d", fan_control_access_mode);
2233
2234         return 1;
2235 }
2236
2237 static int fan_write_cmd_disable(const char *cmd, int *rc)
2238 {
2239         if (strlencmp(cmd, "disable") != 0)
2240                 return 0;
2241
2242         if ((*rc = fan_set_disable()) == -ENXIO)
2243                 printk(IBM_ERR "disable command accepted for unsupported "
2244                        "access mode %d", fan_control_access_mode);
2245
2246         return 1;
2247 }
2248
2249 static int fan_write_cmd_speed(const char *cmd, int *rc)
2250 {
2251         int speed;
2252
2253         /* TODO:
2254          * Support speed <low> <medium> <high> ? */
2255
2256         if (sscanf(cmd, "speed %d", &speed) != 1)
2257                 return 0;
2258
2259         if ((*rc = fan_set_speed(speed)) == -ENXIO)
2260                 printk(IBM_ERR "speed command accepted for unsupported "
2261                        "access mode %d", fan_control_access_mode);
2262
2263         return 1;
2264 }
2265
2266 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2267 {
2268         int interval;
2269
2270         if (sscanf(cmd, "watchdog %d", &interval) != 1)
2271                 return 0;
2272
2273         if (interval < 0 || interval > 120)
2274                 *rc = -EINVAL;
2275         else
2276                 fan_watchdog_maxinterval = interval;
2277
2278         return 1;
2279 }
2280
2281 static int fan_write(char *buf)
2282 {
2283         char *cmd;
2284         int rc = 0;
2285
2286         while (!rc && (cmd = next_cmd(&buf))) {
2287                 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2288                       fan_write_cmd_level(cmd, &rc)) &&
2289                     !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2290                       (fan_write_cmd_enable(cmd, &rc) ||
2291                        fan_write_cmd_disable(cmd, &rc) ||
2292                        fan_write_cmd_watchdog(cmd, &rc))) &&
2293                     !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2294                       fan_write_cmd_speed(cmd, &rc))
2295                     )
2296                         rc = -EINVAL;
2297                 else if (!rc)
2298                         fan_watchdog_reset();
2299         }
2300
2301         return rc;
2302 }
2303
2304 static void fan_watchdog_fire(struct work_struct *ignored)
2305 {
2306         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2307         if (fan_set_enable()) {
2308                 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2309                 /* reschedule for later */
2310                 fan_watchdog_reset();
2311         }
2312 }
2313
2314 static struct ibm_struct ibms[] = {
2315         {
2316          .name = "driver",
2317          .init = ibm_acpi_driver_init,
2318          .read = driver_read,
2319          },
2320         {
2321          .name = "hotkey",
2322          .hid = IBM_HKEY_HID,
2323          .init = hotkey_init,
2324          .read = hotkey_read,
2325          .write = hotkey_write,
2326          .exit = hotkey_exit,
2327          .notify = hotkey_notify,
2328          .handle = &hkey_handle,
2329          .type = ACPI_DEVICE_NOTIFY,
2330          },
2331         {
2332          .name = "bluetooth",
2333          .init = bluetooth_init,
2334          .read = bluetooth_read,
2335          .write = bluetooth_write,
2336          },
2337         {
2338          .name = "wan",
2339          .init = wan_init,
2340          .read = wan_read,
2341          .write = wan_write,
2342          .experimental = 1,
2343          },
2344         {
2345          .name = "video",
2346          .init = video_init,
2347          .read = video_read,
2348          .write = video_write,
2349          .exit = video_exit,
2350          },
2351         {
2352          .name = "light",
2353          .init = light_init,
2354          .read = light_read,
2355          .write = light_write,
2356          },
2357 #ifdef CONFIG_ACPI_IBM_DOCK
2358         {
2359          .name = "dock",
2360          .read = dock_read,
2361          .write = dock_write,
2362          .notify = dock_notify,
2363          .handle = &dock_handle,
2364          .type = ACPI_SYSTEM_NOTIFY,
2365          },
2366         {
2367          .name = "dock",
2368          .hid = IBM_PCI_HID,
2369          .notify = dock_notify,
2370          .handle = &pci_handle,
2371          .type = ACPI_SYSTEM_NOTIFY,
2372          },
2373 #endif
2374 #ifdef CONFIG_ACPI_IBM_BAY
2375         {
2376          .name = "bay",
2377          .init = bay_init,
2378          .read = bay_read,
2379          .write = bay_write,
2380          .notify = bay_notify,
2381          .handle = &bay_handle,
2382          .type = ACPI_SYSTEM_NOTIFY,
2383          },
2384 #endif /* CONFIG_ACPI_IBM_BAY */
2385         {
2386          .name = "cmos",
2387          .read = cmos_read,
2388          .write = cmos_write,
2389          },
2390         {
2391          .name = "led",
2392          .init = led_init,
2393          .read = led_read,
2394          .write = led_write,
2395          },
2396         {
2397          .name = "beep",
2398          .read = beep_read,
2399          .write = beep_write,
2400          },
2401         {
2402          .name = "thermal",
2403          .init = thermal_init,
2404          .read = thermal_read,
2405          },
2406         {
2407          .name = "ecdump",
2408          .read = ecdump_read,
2409          .write = ecdump_write,
2410          .experimental = 1,
2411          },
2412         {
2413          .name = "brightness",
2414          .read = brightness_read,
2415          .write = brightness_write,
2416          .init = brightness_init,
2417          .exit = brightness_exit,
2418          },
2419         {
2420          .name = "volume",
2421          .read = volume_read,
2422          .write = volume_write,
2423          },
2424         {
2425          .name = "fan",
2426          .read = fan_read,
2427          .write = fan_write,
2428          .init = fan_init,
2429          .exit = fan_exit,
2430          .experimental = 1,
2431          },
2432 };
2433
2434 static int dispatch_read(char *page, char **start, off_t off, int count,
2435                          int *eof, void *data)
2436 {
2437         struct ibm_struct *ibm = data;
2438         int len;
2439
2440         if (!ibm || !ibm->read)
2441                 return -EINVAL;
2442
2443         len = ibm->read(page);
2444         if (len < 0)
2445                 return len;
2446
2447         if (len <= off + count)
2448                 *eof = 1;
2449         *start = page + off;
2450         len -= off;
2451         if (len > count)
2452                 len = count;
2453         if (len < 0)
2454                 len = 0;
2455
2456         return len;
2457 }
2458
2459 static int dispatch_write(struct file *file, const char __user * userbuf,
2460                           unsigned long count, void *data)
2461 {
2462         struct ibm_struct *ibm = data;
2463         char *kernbuf;
2464         int ret;
2465
2466         if (!ibm || !ibm->write)
2467                 return -EINVAL;
2468
2469         kernbuf = kmalloc(count + 2, GFP_KERNEL);
2470         if (!kernbuf)
2471                 return -ENOMEM;
2472
2473         if (copy_from_user(kernbuf, userbuf, count)) {
2474                 kfree(kernbuf);
2475                 return -EFAULT;
2476         }
2477
2478         kernbuf[count] = 0;
2479         strcat(kernbuf, ",");
2480         ret = ibm->write(kernbuf);
2481         if (ret == 0)
2482                 ret = count;
2483
2484         kfree(kernbuf);
2485
2486         return ret;
2487 }
2488
2489 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
2490 {
2491         struct ibm_struct *ibm = data;
2492
2493         if (!ibm || !ibm->notify)
2494                 return;
2495
2496         ibm->notify(ibm, event);
2497 }
2498
2499 static int __init setup_notify(struct ibm_struct *ibm)
2500 {
2501         acpi_status status;
2502         int ret;
2503
2504         if (!*ibm->handle)
2505                 return 0;
2506
2507         ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
2508         if (ret < 0) {
2509                 printk(IBM_ERR "%s device not present\n", ibm->name);
2510                 return -ENODEV;
2511         }
2512
2513         acpi_driver_data(ibm->device) = ibm;
2514         sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
2515
2516         status = acpi_install_notify_handler(*ibm->handle, ibm->type,
2517                                              dispatch_notify, ibm);
2518         if (ACPI_FAILURE(status)) {
2519                 if (status == AE_ALREADY_EXISTS) {
2520                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
2521                                 ibm->name);
2522                 } else {
2523                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
2524                                 ibm->name, status);
2525                 }
2526                 return -ENODEV;
2527         }
2528         ibm->notify_installed = 1;
2529         return 0;
2530 }
2531
2532 static int __init ibm_device_add(struct acpi_device *device)
2533 {
2534         return 0;
2535 }
2536
2537 static int __init register_driver(struct ibm_struct *ibm)
2538 {
2539         int ret;
2540
2541         ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
2542         if (!ibm->driver) {
2543                 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
2544                 return -1;
2545         }
2546
2547         sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
2548         ibm->driver->ids = ibm->hid;
2549         ibm->driver->ops.add = &ibm_device_add;
2550
2551         ret = acpi_bus_register_driver(ibm->driver);
2552         if (ret < 0) {
2553                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
2554                        ibm->hid, ret);
2555                 kfree(ibm->driver);
2556         }
2557
2558         return ret;
2559 }
2560
2561 static void ibm_exit(struct ibm_struct *ibm);
2562
2563 static int __init ibm_init(struct ibm_struct *ibm)
2564 {
2565         int ret;
2566         struct proc_dir_entry *entry;
2567
2568         if (ibm->experimental && !experimental)
2569                 return 0;
2570
2571         if (ibm->hid) {
2572                 ret = register_driver(ibm);
2573                 if (ret < 0)
2574                         return ret;
2575                 ibm->driver_registered = 1;
2576         }
2577
2578         if (ibm->init) {
2579                 ret = ibm->init();
2580                 if (ret != 0)
2581                         return ret;
2582                 ibm->init_called = 1;
2583         }
2584
2585         if (ibm->read) {
2586                 entry = create_proc_entry(ibm->name,
2587                                           S_IFREG | S_IRUGO | S_IWUSR,
2588                                           proc_dir);
2589                 if (!entry) {
2590                         printk(IBM_ERR "unable to create proc entry %s\n",
2591                                ibm->name);
2592                         return -ENODEV;
2593                 }
2594                 entry->owner = THIS_MODULE;
2595                 entry->data = ibm;
2596                 entry->read_proc = &dispatch_read;
2597                 if (ibm->write)
2598                         entry->write_proc = &dispatch_write;
2599                 ibm->proc_created = 1;
2600         }
2601
2602         if (ibm->notify) {
2603                 ret = setup_notify(ibm);
2604                 if (ret == -ENODEV) {
2605                         printk(IBM_NOTICE "disabling subdriver %s\n",
2606                                 ibm->name);
2607                         ibm_exit(ibm);
2608                         return 0;
2609                 }
2610                 if (ret < 0)
2611                         return ret;
2612         }
2613
2614         return 0;
2615 }
2616
2617 static void ibm_exit(struct ibm_struct *ibm)
2618 {
2619         if (ibm->notify_installed)
2620                 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2621                                            dispatch_notify);
2622
2623         if (ibm->proc_created)
2624                 remove_proc_entry(ibm->name, proc_dir);
2625
2626         if (ibm->init_called && ibm->exit)
2627                 ibm->exit();
2628
2629         if (ibm->driver_registered) {
2630                 acpi_bus_unregister_driver(ibm->driver);
2631                 kfree(ibm->driver);
2632         }
2633 }
2634
2635 static void __init ibm_handle_init(char *name,
2636                                    acpi_handle * handle, acpi_handle parent,
2637                                    char **paths, int num_paths, char **path)
2638 {
2639         int i;
2640         acpi_status status;
2641
2642         for (i = 0; i < num_paths; i++) {
2643                 status = acpi_get_handle(parent, paths[i], handle);
2644                 if (ACPI_SUCCESS(status)) {
2645                         *path = paths[i];
2646                         return;
2647                 }
2648         }
2649
2650         *handle = NULL;
2651 }
2652
2653 #define IBM_HANDLE_INIT(object)                                         \
2654         ibm_handle_init(#object, &object##_handle, *object##_parent,    \
2655                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
2656
2657 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2658 {
2659         unsigned int i;
2660
2661         for (i = 0; i < ARRAY_SIZE(ibms); i++)
2662                 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2663                         if (strlen(val) > sizeof(ibms[i].param) - 2)
2664                                 return -ENOSPC;
2665                         strcpy(ibms[i].param, val);
2666                         strcat(ibms[i].param, ",");
2667                         return 0;
2668                 }
2669
2670         return -EINVAL;
2671 }
2672
2673 #define IBM_PARAM(feature) \
2674         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2675
2676 IBM_PARAM(hotkey);
2677 IBM_PARAM(bluetooth);
2678 IBM_PARAM(video);
2679 IBM_PARAM(light);
2680 #ifdef CONFIG_ACPI_IBM_DOCK
2681 IBM_PARAM(dock);
2682 #endif
2683 #ifdef CONFIG_ACPI_IBM_BAY
2684 IBM_PARAM(bay);
2685 #endif /* CONFIG_ACPI_IBM_BAY */
2686 IBM_PARAM(cmos);
2687 IBM_PARAM(led);
2688 IBM_PARAM(beep);
2689 IBM_PARAM(ecdump);
2690 IBM_PARAM(brightness);
2691 IBM_PARAM(volume);
2692 IBM_PARAM(fan);
2693
2694 static void acpi_ibm_exit(void)
2695 {
2696         int i;
2697
2698         for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2699                 ibm_exit(&ibms[i]);
2700
2701         if (proc_dir)
2702                 remove_proc_entry(IBM_DIR, acpi_root_dir);
2703
2704         if (ibm_thinkpad_ec_found)
2705                 kfree(ibm_thinkpad_ec_found);
2706 }
2707
2708 static char* __init check_dmi_for_ec(void)
2709 {
2710         struct dmi_device *dev = NULL;
2711         char ec_fw_string[18];
2712
2713         /*
2714          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2715          * X32 or newer, all Z series;  Some models must have an
2716          * up-to-date BIOS or they will not be detected.
2717          *
2718          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2719          */
2720         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2721                 if (sscanf(dev->name,
2722                            "IBM ThinkPad Embedded Controller -[%17c",
2723                            ec_fw_string) == 1) {
2724                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2725                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2726                         return kstrdup(ec_fw_string, GFP_KERNEL);
2727                 }
2728         }
2729         return NULL;
2730 }
2731
2732 static int __init acpi_ibm_init(void)
2733 {
2734         int ret, i;
2735
2736         if (acpi_disabled)
2737                 return -ENODEV;
2738
2739         /* ec is required because many other handles are relative to it */
2740         IBM_HANDLE_INIT(ec);
2741         if (!ec_handle) {
2742                 printk(IBM_ERR "ec object not found\n");
2743                 return -ENODEV;
2744         }
2745
2746         /* Models with newer firmware report the EC in DMI */
2747         ibm_thinkpad_ec_found = check_dmi_for_ec();
2748
2749         /* these handles are not required */
2750         IBM_HANDLE_INIT(vid);
2751         IBM_HANDLE_INIT(vid2);
2752         IBM_HANDLE_INIT(ledb);
2753         IBM_HANDLE_INIT(led);
2754         IBM_HANDLE_INIT(hkey);
2755         IBM_HANDLE_INIT(lght);
2756         IBM_HANDLE_INIT(cmos);
2757 #ifdef CONFIG_ACPI_IBM_DOCK
2758         IBM_HANDLE_INIT(dock);
2759 #endif
2760         IBM_HANDLE_INIT(pci);
2761 #ifdef CONFIG_ACPI_IBM_BAY
2762         IBM_HANDLE_INIT(bay);
2763         if (bay_handle)
2764                 IBM_HANDLE_INIT(bay_ej);
2765         IBM_HANDLE_INIT(bay2);
2766         if (bay2_handle)
2767                 IBM_HANDLE_INIT(bay2_ej);
2768 #endif /* CONFIG_ACPI_IBM_BAY */
2769         IBM_HANDLE_INIT(beep);
2770         IBM_HANDLE_INIT(ecrd);
2771         IBM_HANDLE_INIT(ecwr);
2772         IBM_HANDLE_INIT(fans);
2773         IBM_HANDLE_INIT(gfan);
2774         IBM_HANDLE_INIT(sfan);
2775
2776         proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2777         if (!proc_dir) {
2778                 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2779                 acpi_ibm_exit();
2780                 return -ENODEV;
2781         }
2782         proc_dir->owner = THIS_MODULE;
2783
2784         for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2785                 ret = ibm_init(&ibms[i]);
2786                 if (ret >= 0 && *ibms[i].param)
2787                         ret = ibms[i].write(ibms[i].param);
2788                 if (ret < 0) {
2789                         acpi_ibm_exit();
2790                         return ret;
2791                 }
2792         }
2793
2794         return 0;
2795 }
2796
2797 module_init(acpi_ibm_init);
2798 module_exit(acpi_ibm_exit);