drivers/misc/thinkpad_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) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.13"
  25
  26 /*
  27  *  Changelog:
  28  *
  29  *  2006-11-22  0.13    new maintainer
  30  *                      changelog now lives in git commit history, and will
  31  *                      not be updated further in-file.
  32  *
  33  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  34  *  2005-03-17  0.11    support for 600e, 770x
  35  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  36  *                      support for 770e, G41
  37  *                      G40 and G41 don't have a thinklight
  38  *                      temperatures no longer experimental
  39  *                      experimental brightness control
  40  *                      experimental volume control
  41  *                      experimental fan enable/disable
  42  *  2005-01-16  0.10    fix module loading on R30, R31
  43  *  2005-01-16  0.9     support for 570, R30, R31
  44  *                      ultrabay support on A22p, A3x
  45  *                      limit arg for cmos, led, beep, drop experimental status
  46  *                      more capable led control on A21e, A22p, T20-22, X20
  47  *                      experimental temperatures and fan speed
  48  *                      experimental embedded controller register dump
  49  *                      mark more functions as __init, drop incorrect __exit
  50  *                      use MODULE_VERSION
  51  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  52  *                      fix parameter passing on module loading
  53  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  54  *                          thanks to Jim Radford <radford@blackbean.org>
  55  *  2004-11-08  0.8     fix init error case, don't return from a macro
  56  *                          thanks to Chris Wright <chrisw@osdl.org>
  57  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  58  *                      fix led control on A21e
  59  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  60  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  61  *                      proc file format changed
  62  *                      video_switch command
  63  *                      experimental cmos control
  64  *                      experimental led control
  65  *                      experimental acpi sounds
  66  *  2004-09-16  0.4     support for module parameters
  67  *                      hotkey mask can be prefixed by 0x
  68  *                      video output switching
  69  *                      video expansion control
  70  *                      ultrabay eject support
  71  *                      removed lcd brightness/on/off control, didn't work
  72  *  2004-08-17  0.3     support for R40
  73  *                      lcd off, brightness control
  74  *                      thinklight on/off
  75  *  2004-08-14  0.2     support for T series, X20
  76  *                      bluetooth enable/disable
  77  *                      hotkey events disabled by default
  78  *                      removed fan control, currently useless
  79  *  2004-08-09  0.1     initial release, support for X series
  80  */
  81
  82 #include "thinkpad_acpi.h"
  83
  84 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  85 MODULE_DESCRIPTION(IBM_DESC);
  86 MODULE_VERSION(IBM_VERSION);
  87 MODULE_LICENSE("GPL");
  88
  89 #define __unused __attribute__ ((unused))
  90
  91 /****************************************************************************
  92  ****************************************************************************
  93  *
  94  * ACPI Helpers and device model
  95  *
  96  ****************************************************************************
  97  ****************************************************************************/
  98
  99 /*************************************************************************
 100  * ACPI basic handles
 101  */
 102
 103 static acpi_handle root_handle = NULL;
 104
 105 #define IBM_HANDLE(object, parent, paths...)                    \
 106         static acpi_handle  object##_handle;                    \
 107         static acpi_handle *object##_parent = &parent##_handle; \
 108         static char        *object##_path;                      \
 109         static char        *object##_paths[] = { paths }
 110
 111 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 112            "\\_SB.PCI.ISA.EC",  /* 570 */
 113            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 114            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 115            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 116            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 117            "\\_SB.PCI0.LPC.EC", /* all others */
 118            );
 119
 120 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 121 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 122
 123
 124 /*************************************************************************
 125  * Misc ACPI handles
 126  */
 127
 128 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 129            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 130            "\\CMS",             /* R40, R40e */
 131            );                   /* all others */
 132
 133 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 134            "^HKEY",             /* R30, R31 */
 135            "HKEY",              /* all others */
 136            );                   /* 570 */
 137
 138
 139 /*************************************************************************
 140  * ACPI helpers
 141  */
 142
 143 static int acpi_evalf(acpi_handle handle,
 144                       void *res, char *method, char *fmt, ...)
 145 {
 146         char *fmt0 = fmt;
 147         struct acpi_object_list params;
 148         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 149         struct acpi_buffer result, *resultp;
 150         union acpi_object out_obj;
 151         acpi_status status;
 152         va_list ap;
 153         char res_type;
 154         int success;
 155         int quiet;
 156
 157         if (!*fmt) {
 158                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 159                 return 0;
 160         }
 161
 162         if (*fmt == 'q') {
 163                 quiet = 1;
 164                 fmt++;
 165         } else
 166                 quiet = 0;
 167
 168         res_type = *(fmt++);
 169
 170         params.count = 0;
 171         params.pointer = &in_objs[0];
 172
 173         va_start(ap, fmt);
 174         while (*fmt) {
 175                 char c = *(fmt++);
 176                 switch (c) {
 177                 case 'd':       /* int */
 178                         in_objs[params.count].integer.value = va_arg(ap, int);
 179                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 180                         break;
 181                         /* add more types as needed */
 182                 default:
 183                         printk(IBM_ERR "acpi_evalf() called "
 184                                "with invalid format character '%c'\n", c);
 185                         return 0;
 186                 }
 187         }
 188         va_end(ap);
 189
 190         if (res_type != 'v') {
 191                 result.length = sizeof(out_obj);
 192                 result.pointer = &out_obj;
 193                 resultp = &result;
 194         } else
 195                 resultp = NULL;
 196
 197         status = acpi_evaluate_object(handle, method, &params, resultp);
 198
 199         switch (res_type) {
 200         case 'd':               /* int */
 201                 if (res)
 202                         *(int *)res = out_obj.integer.value;
 203                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 204                 break;
 205         case 'v':               /* void */
 206                 success = status == AE_OK;
 207                 break;
 208                 /* add more types as needed */
 209         default:
 210                 printk(IBM_ERR "acpi_evalf() called "
 211                        "with invalid format character '%c'\n", res_type);
 212                 return 0;
 213         }
 214
 215         if (!success && !quiet)
 216                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 217                        method, fmt0, status);
 218
 219         return success;
 220 }
 221
 222 static void __unused acpi_print_int(acpi_handle handle, char *method)
 223 {
 224         int i;
 225
 226         if (acpi_evalf(handle, &i, method, "d"))
 227                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 228         else
 229                 printk(IBM_ERR "error calling %s\n", method);
 230 }
 231
 232 static int acpi_ec_read(int i, u8 * p)
 233 {
 234         int v;
 235
 236         if (ecrd_handle) {
 237                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 238                         return 0;
 239                 *p = v;
 240         } else {
 241                 if (ec_read(i, p) < 0)
 242                         return 0;
 243         }
 244
 245         return 1;
 246 }
 247
 248 static int acpi_ec_write(int i, u8 v)
 249 {
 250         if (ecwr_handle) {
 251                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 252                         return 0;
 253         } else {
 254                 if (ec_write(i, v) < 0)
 255                         return 0;
 256         }
 257
 258         return 1;
 259 }
 260
 261 static int _sta(acpi_handle handle)
 262 {
 263         int status;
 264
 265         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 266                 status = 0;
 267
 268         return status;
 269 }
 270
 271 /*************************************************************************
 272  * ACPI device model
 273  */
 274
 275 static void __init ibm_handle_init(char *name,
 276                                    acpi_handle * handle, acpi_handle parent,
 277                                    char **paths, int num_paths, char **path)
 278 {
 279         int i;
 280         acpi_status status;
 281
 282         for (i = 0; i < num_paths; i++) {
 283                 status = acpi_get_handle(parent, paths[i], handle);
 284                 if (ACPI_SUCCESS(status)) {
 285                         *path = paths[i];
 286                         return;
 287                 }
 288         }
 289
 290         *handle = NULL;
 291 }
 292
 293 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
 294 {
 295         struct ibm_struct *ibm = data;
 296
 297         if (!ibm || !ibm->notify)
 298                 return;
 299
 300         ibm->notify(ibm, event);
 301 }
 302
 303 static int __init setup_notify(struct ibm_struct *ibm)
 304 {
 305         acpi_status status;
 306         int ret;
 307
 308         if (!*ibm->handle)
 309                 return 0;
 310
 311         ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
 312         if (ret < 0) {
 313                 printk(IBM_ERR "%s device not present\n", ibm->name);
 314                 return -ENODEV;
 315         }
 316
 317         acpi_driver_data(ibm->device) = ibm;
 318         sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
 319
 320         status = acpi_install_notify_handler(*ibm->handle, ibm->type,
 321                                              dispatch_notify, ibm);
 322         if (ACPI_FAILURE(status)) {
 323                 if (status == AE_ALREADY_EXISTS) {
 324                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 325                                 ibm->name);
 326                 } else {
 327                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 328                                 ibm->name, status);
 329                 }
 330                 return -ENODEV;
 331         }
 332         ibm->notify_installed = 1;
 333         return 0;
 334 }
 335
 336 static int __init ibm_device_add(struct acpi_device *device)
 337 {
 338         return 0;
 339 }
 340
 341 static int __init register_ibmacpi_subdriver(struct ibm_struct *ibm)
 342 {
 343         int ret;
 344
 345         ibm->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 346         if (!ibm->driver) {
 347                 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
 348                 return -1;
 349         }
 350
 351         sprintf(ibm->driver->name, "%s_%s", IBM_NAME, ibm->name);
 352         ibm->driver->ids = ibm->hid;
 353         ibm->driver->ops.add = &ibm_device_add;
 354
 355         ret = acpi_bus_register_driver(ibm->driver);
 356         if (ret < 0) {
 357                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 358                        ibm->hid, ret);
 359                 kfree(ibm->driver);
 360         }
 361
 362         return ret;
 363 }
 364
 365
 366 /****************************************************************************
 367  ****************************************************************************
 368  *
 369  * Procfs Helpers
 370  *
 371  ****************************************************************************
 372  ****************************************************************************/
 373
 374 static int dispatch_read(char *page, char **start, off_t off, int count,
 375                          int *eof, void *data)
 376 {
 377         struct ibm_struct *ibm = data;
 378         int len;
 379
 380         if (!ibm || !ibm->read)
 381                 return -EINVAL;
 382
 383         len = ibm->read(page);
 384         if (len < 0)
 385                 return len;
 386
 387         if (len <= off + count)
 388                 *eof = 1;
 389         *start = page + off;
 390         len -= off;
 391         if (len > count)
 392                 len = count;
 393         if (len < 0)
 394                 len = 0;
 395
 396         return len;
 397 }
 398
 399 static int dispatch_write(struct file *file, const char __user * userbuf,
 400                           unsigned long count, void *data)
 401 {
 402         struct ibm_struct *ibm = data;
 403         char *kernbuf;
 404         int ret;
 405
 406         if (!ibm || !ibm->write)
 407                 return -EINVAL;
 408
 409         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 410         if (!kernbuf)
 411                 return -ENOMEM;
 412
 413         if (copy_from_user(kernbuf, userbuf, count)) {
 414                 kfree(kernbuf);
 415                 return -EFAULT;
 416         }
 417
 418         kernbuf[count] = 0;
 419         strcat(kernbuf, ",");
 420         ret = ibm->write(kernbuf);
 421         if (ret == 0)
 422                 ret = count;
 423
 424         kfree(kernbuf);
 425
 426         return ret;
 427 }
 428
 429 static char *next_cmd(char **cmds)
 430 {
 431         char *start = *cmds;
 432         char *end;
 433
 434         while ((end = strchr(start, ',')) && end == start)
 435                 start = end + 1;
 436
 437         if (!end)
 438                 return NULL;
 439
 440         *end = 0;
 441         *cmds = end + 1;
 442         return start;
 443 }
 444
 445
 446 /****************************************************************************
 447  ****************************************************************************
 448  *
 449  * Subdrivers
 450  *
 451  ****************************************************************************
 452  ****************************************************************************/
 453
 454 /*************************************************************************
 455  * ibm-acpi init subdriver
 456  */
 457
 458 static int ibm_acpi_driver_init(void)
 459 {
 460         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 461         printk(IBM_INFO "%s\n", IBM_URL);
 462
 463         if (ibm_thinkpad_ec_found)
 464                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 465                        ibm_thinkpad_ec_found);
 466
 467         return 0;
 468 }
 469
 470 static int ibm_acpi_driver_read(char *p)
 471 {
 472         int len = 0;
 473
 474         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 475         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 476
 477         return len;
 478 }
 479
 480 /*************************************************************************
 481  * Hotkey subdriver
 482  */
 483
 484 static int hotkey_supported;
 485 static int hotkey_mask_supported;
 486 static int hotkey_orig_status;
 487 static int hotkey_orig_mask;
 488
 489 static int hotkey_init(void)
 490 {
 491         /* hotkey not supported on 570 */
 492         hotkey_supported = hkey_handle != NULL;
 493
 494         if (hotkey_supported) {
 495                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 496                    A30, R30, R31, T20-22, X20-21, X22-24 */
 497                 hotkey_mask_supported =
 498                     acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 499
 500                 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
 501                         return -ENODEV;
 502         }
 503
 504         return 0;
 505 }
 506
 507 static void hotkey_exit(void)
 508 {
 509         if (hotkey_supported)
 510                 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 511 }
 512
 513 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 514 {
 515         int hkey;
 516
 517         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 518                 acpi_bus_generate_event(ibm->device, event, hkey);
 519         else {
 520                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 521                 acpi_bus_generate_event(ibm->device, event, 0);
 522         }
 523 }
 524
 525 static int hotkey_get(int *status, int *mask)
 526 {
 527         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 528                 return 0;
 529
 530         if (hotkey_mask_supported)
 531                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 532                         return 0;
 533
 534         return 1;
 535 }
 536
 537 static int hotkey_set(int status, int mask)
 538 {
 539         int i;
 540
 541         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 542                 return 0;
 543
 544         if (hotkey_mask_supported)
 545                 for (i = 0; i < 32; i++) {
 546                         int bit = ((1 << i) & mask) != 0;
 547                         if (!acpi_evalf(hkey_handle,
 548                                         NULL, "MHKM", "vdd", i + 1, bit))
 549                                 return 0;
 550                 }
 551
 552         return 1;
 553 }
 554
 555 static int hotkey_read(char *p)
 556 {
 557         int status, mask;
 558         int len = 0;
 559
 560         if (!hotkey_supported) {
 561                 len += sprintf(p + len, "status:\t\tnot supported\n");
 562                 return len;
 563         }
 564
 565         if (!hotkey_get(&status, &mask))
 566                 return -EIO;
 567
 568         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 569         if (hotkey_mask_supported) {
 570                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 571                 len += sprintf(p + len,
 572                                "commands:\tenable, disable, reset, <mask>\n");
 573         } else {
 574                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 575                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 576         }
 577
 578         return len;
 579 }
 580
 581 static int hotkey_write(char *buf)
 582 {
 583         int status, mask;
 584         char *cmd;
 585         int do_cmd = 0;
 586
 587         if (!hotkey_supported)
 588                 return -ENODEV;
 589
 590         if (!hotkey_get(&status, &mask))
 591                 return -EIO;
 592
 593         while ((cmd = next_cmd(&buf))) {
 594                 if (strlencmp(cmd, "enable") == 0) {
 595                         status = 1;
 596                 } else if (strlencmp(cmd, "disable") == 0) {
 597                         status = 0;
 598                 } else if (strlencmp(cmd, "reset") == 0) {
 599                         status = hotkey_orig_status;
 600                         mask = hotkey_orig_mask;
 601                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 602                         /* mask set */
 603                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 604                         /* mask set */
 605                 } else
 606                         return -EINVAL;
 607                 do_cmd = 1;
 608         }
 609
 610         if (do_cmd && !hotkey_set(status, mask))
 611                 return -EIO;
 612
 613         return 0;
 614 }
 615
 616 /*************************************************************************
 617  * Bluetooth subdriver
 618  */
 619
 620 static int bluetooth_supported;
 621
 622 static int bluetooth_init(void)
 623 {
 624         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 625            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 626         bluetooth_supported = hkey_handle &&
 627             acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
 628
 629         return 0;
 630 }
 631
 632 static int bluetooth_status(void)
 633 {
 634         int status;
 635
 636         if (!bluetooth_supported ||
 637             !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 638                 status = 0;
 639
 640         return status;
 641 }
 642
 643 static int bluetooth_read(char *p)
 644 {
 645         int len = 0;
 646         int status = bluetooth_status();
 647
 648         if (!bluetooth_supported)
 649                 len += sprintf(p + len, "status:\t\tnot supported\n");
 650         else if (!(status & 1))
 651                 len += sprintf(p + len, "status:\t\tnot installed\n");
 652         else {
 653                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 654                 len += sprintf(p + len, "commands:\tenable, disable\n");
 655         }
 656
 657         return len;
 658 }
 659
 660 static int bluetooth_write(char *buf)
 661 {
 662         int status = bluetooth_status();
 663         char *cmd;
 664         int do_cmd = 0;
 665
 666         if (!bluetooth_supported)
 667                 return -ENODEV;
 668
 669         while ((cmd = next_cmd(&buf))) {
 670                 if (strlencmp(cmd, "enable") == 0) {
 671                         status |= 2;
 672                 } else if (strlencmp(cmd, "disable") == 0) {
 673                         status &= ~2;
 674                 } else
 675                         return -EINVAL;
 676                 do_cmd = 1;
 677         }
 678
 679         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 680                 return -EIO;
 681
 682         return 0;
 683 }
 684
 685 /*************************************************************************
 686  * Wan subdriver
 687  */
 688
 689 static int wan_supported;
 690
 691 static int wan_init(void)
 692 {
 693         wan_supported = hkey_handle &&
 694             acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
 695
 696         return 0;
 697 }
 698
 699 static int wan_status(void)
 700 {
 701         int status;
 702
 703         if (!wan_supported || !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 704                 status = 0;
 705
 706         return status;
 707 }
 708
 709 static int wan_read(char *p)
 710 {
 711         int len = 0;
 712         int status = wan_status();
 713
 714         if (!wan_supported)
 715                 len += sprintf(p + len, "status:\t\tnot supported\n");
 716         else if (!(status & 1))
 717                 len += sprintf(p + len, "status:\t\tnot installed\n");
 718         else {
 719                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 720                 len += sprintf(p + len, "commands:\tenable, disable\n");
 721         }
 722
 723         return len;
 724 }
 725
 726 static int wan_write(char *buf)
 727 {
 728         int status = wan_status();
 729         char *cmd;
 730         int do_cmd = 0;
 731
 732         if (!wan_supported)
 733                 return -ENODEV;
 734
 735         while ((cmd = next_cmd(&buf))) {
 736                 if (strlencmp(cmd, "enable") == 0) {
 737                         status |= 2;
 738                 } else if (strlencmp(cmd, "disable") == 0) {
 739                         status &= ~2;
 740                 } else
 741                         return -EINVAL;
 742                 do_cmd = 1;
 743         }
 744
 745         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
 746                 return -EIO;
 747
 748         return 0;
 749 }
 750
 751 /*************************************************************************
 752  * Video subdriver
 753  */
 754
 755 static enum video_access_mode video_supported;
 756 static int video_orig_autosw;
 757
 758 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 759            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 760            "\\_SB.PCI0.VID0",   /* 770e */
 761            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 762            "\\_SB.PCI0.AGP.VID",        /* all others */
 763            );                           /* R30, R31 */
 764
 765 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 766
 767 static int video_init(void)
 768 {
 769         int ivga;
 770
 771         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 772                 /* G41, assume IVGA doesn't change */
 773                 vid_handle = vid2_handle;
 774
 775         if (!vid_handle)
 776                 /* video switching not supported on R30, R31 */
 777                 video_supported = IBMACPI_VIDEO_NONE;
 778         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 779                 /* 570 */
 780                 video_supported = IBMACPI_VIDEO_570;
 781         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 782                 /* 600e/x, 770e, 770x */
 783                 video_supported = IBMACPI_VIDEO_770;
 784         else
 785                 /* all others */
 786                 video_supported = IBMACPI_VIDEO_NEW;
 787
 788         return 0;
 789 }
 790
 791 static void video_exit(void)
 792 {
 793         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
 794 }
 795
 796 static int video_status(void)
 797 {
 798         int status = 0;
 799         int i;
 800
 801         if (video_supported == IBMACPI_VIDEO_570) {
 802                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
 803                         status = i & 3;
 804         } else if (video_supported == IBMACPI_VIDEO_770) {
 805                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 806                         status |= 0x01 * i;
 807                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 808                         status |= 0x02 * i;
 809         } else if (video_supported == IBMACPI_VIDEO_NEW) {
 810                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
 811                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 812                         status |= 0x02 * i;
 813
 814                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
 815                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 816                         status |= 0x01 * i;
 817                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
 818                         status |= 0x08 * i;
 819         }
 820
 821         return status;
 822 }
 823
 824 static int video_autosw(void)
 825 {
 826         int autosw = 0;
 827
 828         if (video_supported == IBMACPI_VIDEO_570)
 829                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
 830         else if (video_supported == IBMACPI_VIDEO_770 ||
 831                  video_supported == IBMACPI_VIDEO_NEW)
 832                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
 833
 834         return autosw & 1;
 835 }
 836
 837 static int video_switch(void)
 838 {
 839         int autosw = video_autosw();
 840         int ret;
 841
 842         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 843                 return -EIO;
 844         ret = video_supported == IBMACPI_VIDEO_570 ?
 845             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
 846             acpi_evalf(vid_handle, NULL, "VSWT", "v");
 847         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 848
 849         return ret;
 850 }
 851
 852 static int video_expand(void)
 853 {
 854         if (video_supported == IBMACPI_VIDEO_570)
 855                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
 856         else if (video_supported == IBMACPI_VIDEO_770)
 857                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
 858         else
 859                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
 860 }
 861
 862 static int video_switch2(int status)
 863 {
 864         int ret;
 865
 866         if (video_supported == IBMACPI_VIDEO_570) {
 867                 ret = acpi_evalf(NULL, NULL,
 868                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
 869         } else if (video_supported == IBMACPI_VIDEO_770) {
 870                 int autosw = video_autosw();
 871                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 872                         return -EIO;
 873
 874                 ret = acpi_evalf(vid_handle, NULL,
 875                                  "ASWT", "vdd", status * 0x100, 0);
 876
 877                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 878         } else {
 879                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
 880                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
 881         }
 882
 883         return ret;
 884 }
 885
 886 static int video_read(char *p)
 887 {
 888         int status = video_status();
 889         int autosw = video_autosw();
 890         int len = 0;
 891
 892         if (!video_supported) {
 893                 len += sprintf(p + len, "status:\t\tnot supported\n");
 894                 return len;
 895         }
 896
 897         len += sprintf(p + len, "status:\t\tsupported\n");
 898         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
 899         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
 900         if (video_supported == IBMACPI_VIDEO_NEW)
 901                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
 902         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
 903         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
 904         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
 905         if (video_supported == IBMACPI_VIDEO_NEW)
 906                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
 907         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
 908         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
 909
 910         return len;
 911 }
 912
 913 static int video_write(char *buf)
 914 {
 915         char *cmd;
 916         int enable, disable, status;
 917
 918         if (!video_supported)
 919                 return -ENODEV;
 920
 921         enable = disable = 0;
 922
 923         while ((cmd = next_cmd(&buf))) {
 924                 if (strlencmp(cmd, "lcd_enable") == 0) {
 925                         enable |= 0x01;
 926                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
 927                         disable |= 0x01;
 928                 } else if (strlencmp(cmd, "crt_enable") == 0) {
 929                         enable |= 0x02;
 930                 } else if (strlencmp(cmd, "crt_disable") == 0) {
 931                         disable |= 0x02;
 932                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 933                            strlencmp(cmd, "dvi_enable") == 0) {
 934                         enable |= 0x08;
 935                 } else if (video_supported == IBMACPI_VIDEO_NEW &&
 936                            strlencmp(cmd, "dvi_disable") == 0) {
 937                         disable |= 0x08;
 938                 } else if (strlencmp(cmd, "auto_enable") == 0) {
 939                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 940                                 return -EIO;
 941                 } else if (strlencmp(cmd, "auto_disable") == 0) {
 942                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
 943                                 return -EIO;
 944                 } else if (strlencmp(cmd, "video_switch") == 0) {
 945                         if (!video_switch())
 946                                 return -EIO;
 947                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
 948                         if (!video_expand())
 949                                 return -EIO;
 950                 } else
 951                         return -EINVAL;
 952         }
 953
 954         if (enable || disable) {
 955                 status = (video_status() & 0x0f & ~disable) | enable;
 956                 if (!video_switch2(status))
 957                         return -EIO;
 958         }
 959
 960         return 0;
 961 }
 962
 963 /*************************************************************************
 964  * Light (thinklight) subdriver
 965  */
 966
 967 static int light_supported;
 968 static int light_status_supported;
 969
 970 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
 971 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
 972
 973 static int light_init(void)
 974 {
 975         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
 976         light_supported = (cmos_handle || lght_handle) && !ledb_handle;
 977
 978         if (light_supported)
 979                 /* light status not supported on
 980                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
 981                 light_status_supported = acpi_evalf(ec_handle, NULL,
 982                                                     "KBLT", "qv");
 983
 984         return 0;
 985 }
 986
 987 static int light_read(char *p)
 988 {
 989         int len = 0;
 990         int status = 0;
 991
 992         if (!light_supported) {
 993                 len += sprintf(p + len, "status:\t\tnot supported\n");
 994         } else if (!light_status_supported) {
 995                 len += sprintf(p + len, "status:\t\tunknown\n");
 996                 len += sprintf(p + len, "commands:\ton, off\n");
 997         } else {
 998                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
 999                         return -EIO;
1000                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1001                 len += sprintf(p + len, "commands:\ton, off\n");
1002         }
1003
1004         return len;
1005 }
1006
1007 static int light_write(char *buf)
1008 {
1009         int cmos_cmd, lght_cmd;
1010         char *cmd;
1011         int success;
1012
1013         if (!light_supported)
1014                 return -ENODEV;
1015
1016         while ((cmd = next_cmd(&buf))) {
1017                 if (strlencmp(cmd, "on") == 0) {
1018                         cmos_cmd = 0x0c;
1019                         lght_cmd = 1;
1020                 } else if (strlencmp(cmd, "off") == 0) {
1021                         cmos_cmd = 0x0d;
1022                         lght_cmd = 0;
1023                 } else
1024                         return -EINVAL;
1025
1026                 success = cmos_handle ?
1027                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1028                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1029                 if (!success)
1030                         return -EIO;
1031         }
1032
1033         return 0;
1034 }
1035
1036 /*************************************************************************
1037  * Dock subdriver
1038  */
1039
1040 /* don't list other alternatives as we install a notify handler on the 570 */
1041 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1042
1043 #ifdef CONFIG_ACPI_IBM_DOCK
1044
1045 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1046            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1047            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1048            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1049     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1050
1051 #define dock_docked() (_sta(dock_handle) & 1)
1052
1053 static void dock_notify(struct ibm_struct *ibm, u32 event)
1054 {
1055         int docked = dock_docked();
1056         int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
1057
1058         if (event == 1 && !pci) /* 570 */
1059                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1060         else if (event == 1 && pci)     /* 570 */
1061                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1062         else if (event == 3 && docked)
1063                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
1064         else if (event == 3 && !docked)
1065                 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
1066         else if (event == 0 && docked)
1067                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
1068         else {
1069                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1070                        event, _sta(dock_handle));
1071                 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
1072         }
1073 }
1074
1075 static int dock_read(char *p)
1076 {
1077         int len = 0;
1078         int docked = dock_docked();
1079
1080         if (!dock_handle)
1081                 len += sprintf(p + len, "status:\t\tnot supported\n");
1082         else if (!docked)
1083                 len += sprintf(p + len, "status:\t\tundocked\n");
1084         else {
1085                 len += sprintf(p + len, "status:\t\tdocked\n");
1086                 len += sprintf(p + len, "commands:\tdock, undock\n");
1087         }
1088
1089         return len;
1090 }
1091
1092 static int dock_write(char *buf)
1093 {
1094         char *cmd;
1095
1096         if (!dock_docked())
1097                 return -ENODEV;
1098
1099         while ((cmd = next_cmd(&buf))) {
1100                 if (strlencmp(cmd, "undock") == 0) {
1101                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1102                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1103                                 return -EIO;
1104                 } else if (strlencmp(cmd, "dock") == 0) {
1105                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1106                                 return -EIO;
1107                 } else
1108                         return -EINVAL;
1109         }
1110
1111         return 0;
1112 }
1113
1114 #endif /* CONFIG_ACPI_IBM_DOCK */
1115
1116 /*************************************************************************
1117  * Bay subdriver
1118  */
1119
1120 #ifdef CONFIG_ACPI_IBM_BAY
1121 static int bay_status_supported;
1122 static int bay_status2_supported;
1123 static int bay_eject_supported;
1124 static int bay_eject2_supported;
1125
1126 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1127            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1128            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1129            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1130            );                           /* A21e, R30, R31 */
1131 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1132            "_EJ0",              /* all others */
1133            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1134 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
1135            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1136            );                           /* all others */
1137 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
1138            "_EJ0",                      /* 770x */
1139            );                           /* all others */
1140
1141 static int bay_init(void)
1142 {
1143         bay_status_supported = bay_handle &&
1144             acpi_evalf(bay_handle, NULL, "_STA", "qv");
1145         bay_status2_supported = bay2_handle &&
1146             acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1147
1148         bay_eject_supported = bay_handle && bay_ej_handle &&
1149             (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1150         bay_eject2_supported = bay2_handle && bay2_ej_handle &&
1151             (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1152
1153         return 0;
1154 }
1155
1156 static void bay_notify(struct ibm_struct *ibm, u32 event)
1157 {
1158         acpi_bus_generate_event(ibm->device, event, 0);
1159 }
1160
1161 #define bay_occupied(b) (_sta(b##_handle) & 1)
1162
1163 static int bay_read(char *p)
1164 {
1165         int len = 0;
1166         int occupied = bay_occupied(bay);
1167         int occupied2 = bay_occupied(bay2);
1168         int eject, eject2;
1169
1170         len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
1171                        (occupied ? "occupied" : "unoccupied") :
1172                        "not supported");
1173         if (bay_status2_supported)
1174                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1175                                "occupied" : "unoccupied");
1176
1177         eject = bay_eject_supported && occupied;
1178         eject2 = bay_eject2_supported && occupied2;
1179
1180         if (eject && eject2)
1181                 len += sprintf(p + len, "commands:\teject, eject2\n");
1182         else if (eject)
1183                 len += sprintf(p + len, "commands:\teject\n");
1184         else if (eject2)
1185                 len += sprintf(p + len, "commands:\teject2\n");
1186
1187         return len;
1188 }
1189
1190 static int bay_write(char *buf)
1191 {
1192         char *cmd;
1193
1194         if (!bay_eject_supported && !bay_eject2_supported)
1195                 return -ENODEV;
1196
1197         while ((cmd = next_cmd(&buf))) {
1198                 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
1199                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1200                                 return -EIO;
1201                 } else if (bay_eject2_supported &&
1202                            strlencmp(cmd, "eject2") == 0) {
1203                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1204                                 return -EIO;
1205                 } else
1206                         return -EINVAL;
1207         }
1208
1209         return 0;
1210 }
1211 #endif /* CONFIG_ACPI_IBM_BAY */
1212
1213 /*************************************************************************
1214  * CMOS subdriver
1215  */
1216
1217 static int cmos_eval(int cmos_cmd)
1218 {
1219         if (cmos_handle)
1220                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1221         else
1222                 return 1;
1223 }
1224
1225 static int cmos_read(char *p)
1226 {
1227         int len = 0;
1228
1229         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1230            R30, R31, T20-22, X20-21 */
1231         if (!cmos_handle)
1232                 len += sprintf(p + len, "status:\t\tnot supported\n");
1233         else {
1234                 len += sprintf(p + len, "status:\t\tsupported\n");
1235                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1236         }
1237
1238         return len;
1239 }
1240
1241 static int cmos_write(char *buf)
1242 {
1243         char *cmd;
1244         int cmos_cmd;
1245
1246         if (!cmos_handle)
1247                 return -EINVAL;
1248
1249         while ((cmd = next_cmd(&buf))) {
1250                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1251                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1252                         /* cmos_cmd set */
1253                 } else
1254                         return -EINVAL;
1255
1256                 if (!cmos_eval(cmos_cmd))
1257                         return -EIO;
1258         }
1259
1260         return 0;
1261 }
1262
1263
1264 /*************************************************************************
1265  * LED subdriver
1266  */
1267
1268 static enum led_access_mode led_supported;
1269
1270 IBM_HANDLE(led, ec, "SLED",     /* 570 */
1271            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1272            "LED",               /* all others */
1273            );                   /* R30, R31 */
1274
1275 static int led_init(void)
1276 {
1277         if (!led_handle)
1278                 /* led not supported on R30, R31 */
1279                 led_supported = IBMACPI_LED_NONE;
1280         else if (strlencmp(led_path, "SLED") == 0)
1281                 /* 570 */
1282                 led_supported = IBMACPI_LED_570;
1283         else if (strlencmp(led_path, "SYSL") == 0)
1284                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1285                 led_supported = IBMACPI_LED_OLD;
1286         else
1287                 /* all others */
1288                 led_supported = IBMACPI_LED_NEW;
1289
1290         return 0;
1291 }
1292
1293 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1294
1295 static int led_read(char *p)
1296 {
1297         int len = 0;
1298
1299         if (!led_supported) {
1300                 len += sprintf(p + len, "status:\t\tnot supported\n");
1301                 return len;
1302         }
1303         len += sprintf(p + len, "status:\t\tsupported\n");
1304
1305         if (led_supported == IBMACPI_LED_570) {
1306                 /* 570 */
1307                 int i, status;
1308                 for (i = 0; i < 8; i++) {
1309                         if (!acpi_evalf(ec_handle,
1310                                         &status, "GLED", "dd", 1 << i))
1311                                 return -EIO;
1312                         len += sprintf(p + len, "%d:\t\t%s\n",
1313                                        i, led_status(status));
1314                 }
1315         }
1316
1317         len += sprintf(p + len, "commands:\t"
1318                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1319
1320         return len;
1321 }
1322
1323 /* off, on, blink */
1324 static const int led_sled_arg1[] = { 0, 1, 3 };
1325 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1326 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1327 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1328
1329 static int led_write(char *buf)
1330 {
1331         char *cmd;
1332         int led, ind, ret;
1333
1334         if (!led_supported)
1335                 return -ENODEV;
1336
1337         while ((cmd = next_cmd(&buf))) {
1338                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1339                         return -EINVAL;
1340
1341                 if (strstr(cmd, "off")) {
1342                         ind = 0;
1343                 } else if (strstr(cmd, "on")) {
1344                         ind = 1;
1345                 } else if (strstr(cmd, "blink")) {
1346                         ind = 2;
1347                 } else
1348                         return -EINVAL;
1349
1350                 if (led_supported == IBMACPI_LED_570) {
1351                         /* 570 */
1352                         led = 1 << led;
1353                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1354                                         led, led_sled_arg1[ind]))
1355                                 return -EIO;
1356                 } else if (led_supported == IBMACPI_LED_OLD) {
1357                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1358                         led = 1 << led;
1359                         ret = ec_write(IBMACPI_LED_EC_HLMS, led);
1360                         if (ret >= 0)
1361                                 ret =
1362                                     ec_write(IBMACPI_LED_EC_HLBL,
1363                                              led * led_exp_hlbl[ind]);
1364                         if (ret >= 0)
1365                                 ret =
1366                                     ec_write(IBMACPI_LED_EC_HLCL,
1367                                              led * led_exp_hlcl[ind]);
1368                         if (ret < 0)
1369                                 return ret;
1370                 } else {
1371                         /* all others */
1372                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1373                                         led, led_led_arg1[ind]))
1374                                 return -EIO;
1375                 }
1376         }
1377
1378         return 0;
1379 }
1380
1381 /*************************************************************************
1382  * Beep subdriver
1383  */
1384
1385 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
1386
1387 static int beep_read(char *p)
1388 {
1389         int len = 0;
1390
1391         if (!beep_handle)
1392                 len += sprintf(p + len, "status:\t\tnot supported\n");
1393         else {
1394                 len += sprintf(p + len, "status:\t\tsupported\n");
1395                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1396         }
1397
1398         return len;
1399 }
1400
1401 static int beep_write(char *buf)
1402 {
1403         char *cmd;
1404         int beep_cmd;
1405
1406         if (!beep_handle)
1407                 return -ENODEV;
1408
1409         while ((cmd = next_cmd(&buf))) {
1410                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1411                     beep_cmd >= 0 && beep_cmd <= 17) {
1412                         /* beep_cmd set */
1413                 } else
1414                         return -EINVAL;
1415                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1416                         return -EIO;
1417         }
1418
1419         return 0;
1420 }
1421
1422 /*************************************************************************
1423  * Thermal subdriver
1424  */
1425
1426 static enum thermal_access_mode thermal_read_mode;
1427
1428 static int thermal_init(void)
1429 {
1430         u8 t, ta1, ta2;
1431         int i;
1432         int acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1433
1434         if (ibm_thinkpad_ec_found && experimental) {
1435                 /*
1436                  * Direct EC access mode: sensors at registers
1437                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
1438                  * non-implemented, thermal sensors return 0x80 when
1439                  * not available
1440                  */
1441
1442                 ta1 = ta2 = 0;
1443                 for (i = 0; i < 8; i++) {
1444                         if (likely(acpi_ec_read(0x78 + i, &t))) {
1445                                 ta1 |= t;
1446                         } else {
1447                                 ta1 = 0;
1448                                 break;
1449                         }
1450                         if (likely(acpi_ec_read(0xC0 + i, &t))) {
1451                                 ta2 |= t;
1452                         } else {
1453                                 ta1 = 0;
1454                                 break;
1455                         }
1456                 }
1457                 if (ta1 == 0) {
1458                         /* This is sheer paranoia, but we handle it anyway */
1459                         if (acpi_tmp7) {
1460                                 printk(IBM_ERR
1461                                        "ThinkPad ACPI EC access misbehaving, "
1462                                        "falling back to ACPI TMPx access mode\n");
1463                                 thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1464                         } else {
1465                                 printk(IBM_ERR
1466                                        "ThinkPad ACPI EC access misbehaving, "
1467                                        "disabling thermal sensors access\n");
1468                                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1469                         }
1470                 } else {
1471                         thermal_read_mode =
1472                             (ta2 != 0) ?
1473                             IBMACPI_THERMAL_TPEC_16 : IBMACPI_THERMAL_TPEC_8;
1474                 }
1475         } else if (acpi_tmp7) {
1476                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1477                         /* 600e/x, 770e, 770x */
1478                         thermal_read_mode = IBMACPI_THERMAL_ACPI_UPDT;
1479                 } else {
1480                         /* Standard ACPI TMPx access, max 8 sensors */
1481                         thermal_read_mode = IBMACPI_THERMAL_ACPI_TMP07;
1482                 }
1483         } else {
1484                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1485                 thermal_read_mode = IBMACPI_THERMAL_NONE;
1486         }
1487
1488         return 0;
1489 }
1490
1491 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1492 {
1493         int i, t;
1494         s8 tmp;
1495         char tmpi[] = "TMPi";
1496
1497         if (!s)
1498                 return -EINVAL;
1499
1500         switch (thermal_read_mode) {
1501 #if IBMACPI_MAX_THERMAL_SENSORS >= 16
1502         case IBMACPI_THERMAL_TPEC_16:
1503                 for (i = 0; i < 8; i++) {
1504                         if (!acpi_ec_read(0xC0 + i, &tmp))
1505                                 return -EIO;
1506                         s->temp[i + 8] = tmp * 1000;
1507                 }
1508                 /* fallthrough */
1509 #endif
1510         case IBMACPI_THERMAL_TPEC_8:
1511                 for (i = 0; i < 8; i++) {
1512                         if (!acpi_ec_read(0x78 + i, &tmp))
1513                                 return -EIO;
1514                         s->temp[i] = tmp * 1000;
1515                 }
1516                 return (thermal_read_mode == IBMACPI_THERMAL_TPEC_16) ? 16 : 8;
1517
1518         case IBMACPI_THERMAL_ACPI_UPDT:
1519                 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1520                         return -EIO;
1521                 for (i = 0; i < 8; i++) {
1522                         tmpi[3] = '0' + i;
1523                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1524                                 return -EIO;
1525                         s->temp[i] = (t - 2732) * 100;
1526                 }
1527                 return 8;
1528
1529         case IBMACPI_THERMAL_ACPI_TMP07:
1530                 for (i = 0; i < 8; i++) {
1531                         tmpi[3] = '0' + i;
1532                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1533                                 return -EIO;
1534                         s->temp[i] = t * 1000;
1535                 }
1536                 return 8;
1537
1538         case IBMACPI_THERMAL_NONE:
1539         default:
1540                 return 0;
1541         }
1542 }
1543
1544 static int thermal_read(char *p)
1545 {
1546         int len = 0;
1547         int n, i;
1548         struct ibm_thermal_sensors_struct t;
1549
1550         n = thermal_get_sensors(&t);
1551         if (unlikely(n < 0))
1552                 return n;
1553
1554         len += sprintf(p + len, "temperatures:\t");
1555
1556         if (n > 0) {
1557                 for (i = 0; i < (n - 1); i++)
1558                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1559                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1560         } else
1561                 len += sprintf(p + len, "not supported\n");
1562
1563         return len;
1564 }
1565
1566 /*************************************************************************
1567  * EC Dump subdriver
1568  */
1569
1570 static u8 ecdump_regs[256];
1571
1572 static int ecdump_read(char *p)
1573 {
1574         int len = 0;
1575         int i, j;
1576         u8 v;
1577
1578         len += sprintf(p + len, "EC      "
1579                        " +00 +01 +02 +03 +04 +05 +06 +07"
1580                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1581         for (i = 0; i < 256; i += 16) {
1582                 len += sprintf(p + len, "EC 0x%02x:", i);
1583                 for (j = 0; j < 16; j++) {
1584                         if (!acpi_ec_read(i + j, &v))
1585                                 break;
1586                         if (v != ecdump_regs[i + j])
1587                                 len += sprintf(p + len, " *%02x", v);
1588                         else
1589                                 len += sprintf(p + len, "  %02x", v);
1590                         ecdump_regs[i + j] = v;
1591                 }
1592                 len += sprintf(p + len, "\n");
1593                 if (j != 16)
1594                         break;
1595         }
1596
1597         /* These are way too dangerous to advertise openly... */
1598 #if 0
1599         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1600                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1601         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1602                        " (<offset> is 00-ff, <value> is 0-255)\n");
1603 #endif
1604         return len;
1605 }
1606
1607 static int ecdump_write(char *buf)
1608 {
1609         char *cmd;
1610         int i, v;
1611
1612         while ((cmd = next_cmd(&buf))) {
1613                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1614                         /* i and v set */
1615                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1616                         /* i and v set */
1617                 } else
1618                         return -EINVAL;
1619                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1620                         if (!acpi_ec_write(i, v))
1621                                 return -EIO;
1622                 } else
1623                         return -EINVAL;
1624         }
1625
1626         return 0;
1627 }
1628
1629 /*************************************************************************
1630  * Backlight/brightness subdriver
1631  */
1632
1633 static struct backlight_device *ibm_backlight_device = NULL;
1634
1635 static struct backlight_ops ibm_backlight_data = {
1636         .get_brightness = brightness_get,
1637         .update_status  = brightness_update_status,
1638 };
1639
1640 static int brightness_init(void)
1641 {
1642         int b;
1643
1644         b = brightness_get(NULL);
1645         if (b < 0)
1646                 return b;
1647
1648         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1649                                                          &ibm_backlight_data);
1650         if (IS_ERR(ibm_backlight_device)) {
1651                 printk(IBM_ERR "Could not register backlight device\n");
1652                 return PTR_ERR(ibm_backlight_device);
1653         }
1654
1655         ibm_backlight_device->props.max_brightness = 7;
1656         ibm_backlight_device->props.brightness = b;
1657         backlight_update_status(ibm_backlight_device);
1658
1659         return 0;
1660 }
1661
1662 static void brightness_exit(void)
1663 {
1664         if (ibm_backlight_device) {
1665                 backlight_device_unregister(ibm_backlight_device);
1666                 ibm_backlight_device = NULL;
1667         }
1668 }
1669
1670 static int brightness_update_status(struct backlight_device *bd)
1671 {
1672         return brightness_set(
1673                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1674                  bd->props.power == FB_BLANK_UNBLANK) ?
1675                                 bd->props.brightness : 0);
1676 }
1677
1678 static int brightness_get(struct backlight_device *bd)
1679 {
1680         u8 level;
1681         if (!acpi_ec_read(brightness_offset, &level))
1682                 return -EIO;
1683
1684         level &= 0x7;
1685
1686         return level;
1687 }
1688
1689 static int brightness_set(int value)
1690 {
1691         int cmos_cmd, inc, i;
1692         int current_value = brightness_get(NULL);
1693
1694         value &= 7;
1695
1696         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
1697         inc = value > current_value ? 1 : -1;
1698         for (i = current_value; i != value; i += inc) {
1699                 if (!cmos_eval(cmos_cmd))
1700                         return -EIO;
1701                 if (!acpi_ec_write(brightness_offset, i + inc))
1702                         return -EIO;
1703         }
1704
1705         return 0;
1706 }
1707
1708 static int brightness_read(char *p)
1709 {
1710         int len = 0;
1711         int level;
1712
1713         if ((level = brightness_get(NULL)) < 0) {
1714                 len += sprintf(p + len, "level:\t\tunreadable\n");
1715         } else {
1716                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1717                 len += sprintf(p + len, "commands:\tup, down\n");
1718                 len += sprintf(p + len, "commands:\tlevel <level>"
1719                                " (<level> is 0-7)\n");
1720         }
1721
1722         return len;
1723 }
1724
1725 static int brightness_write(char *buf)
1726 {
1727         int level;
1728         int new_level;
1729         char *cmd;
1730
1731         while ((cmd = next_cmd(&buf))) {
1732                 if ((level = brightness_get(NULL)) < 0)
1733                         return level;
1734                 level &= 7;
1735
1736                 if (strlencmp(cmd, "up") == 0) {
1737                         new_level = level == 7 ? 7 : level + 1;
1738                 } else if (strlencmp(cmd, "down") == 0) {
1739                         new_level = level == 0 ? 0 : level - 1;
1740                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1741                            new_level >= 0 && new_level <= 7) {
1742                         /* new_level set */
1743                 } else
1744                         return -EINVAL;
1745
1746                 brightness_set(new_level);
1747         }
1748
1749         return 0;
1750 }
1751
1752 /*************************************************************************
1753  * Volume subdriver
1754  */
1755
1756 static int volume_read(char *p)
1757 {
1758         int len = 0;
1759         u8 level;
1760
1761         if (!acpi_ec_read(volume_offset, &level)) {
1762                 len += sprintf(p + len, "level:\t\tunreadable\n");
1763         } else {
1764                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1765                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1766                 len += sprintf(p + len, "commands:\tup, down, mute\n");
1767                 len += sprintf(p + len, "commands:\tlevel <level>"
1768                                " (<level> is 0-15)\n");
1769         }
1770
1771         return len;
1772 }
1773
1774 static int volume_write(char *buf)
1775 {
1776         int cmos_cmd, inc, i;
1777         u8 level, mute;
1778         int new_level, new_mute;
1779         char *cmd;
1780
1781         while ((cmd = next_cmd(&buf))) {
1782                 if (!acpi_ec_read(volume_offset, &level))
1783                         return -EIO;
1784                 new_mute = mute = level & 0x40;
1785                 new_level = level = level & 0xf;
1786
1787                 if (strlencmp(cmd, "up") == 0) {
1788                         if (mute)
1789                                 new_mute = 0;
1790                         else
1791                                 new_level = level == 15 ? 15 : level + 1;
1792                 } else if (strlencmp(cmd, "down") == 0) {
1793                         if (mute)
1794                                 new_mute = 0;
1795                         else
1796                                 new_level = level == 0 ? 0 : level - 1;
1797                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1798                            new_level >= 0 && new_level <= 15) {
1799                         /* new_level set */
1800                 } else if (strlencmp(cmd, "mute") == 0) {
1801                         new_mute = 0x40;
1802                 } else
1803                         return -EINVAL;
1804
1805                 if (new_level != level) {       /* mute doesn't change */
1806                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
1807                         inc = new_level > level ? 1 : -1;
1808
1809                         if (mute && (!cmos_eval(cmos_cmd) ||
1810                                      !acpi_ec_write(volume_offset, level)))
1811                                 return -EIO;
1812
1813                         for (i = level; i != new_level; i += inc)
1814                                 if (!cmos_eval(cmos_cmd) ||
1815                                     !acpi_ec_write(volume_offset, i + inc))
1816                                         return -EIO;
1817
1818                         if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
1819                                      !acpi_ec_write(volume_offset,
1820                                                     new_level + mute)))
1821                                 return -EIO;
1822                 }
1823
1824                 if (new_mute != mute) { /* level doesn't change */
1825                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
1826
1827                         if (!cmos_eval(cmos_cmd) ||
1828                             !acpi_ec_write(volume_offset, level + new_mute))
1829                                 return -EIO;
1830                 }
1831         }
1832
1833         return 0;
1834 }
1835
1836
1837 /*************************************************************************
1838  * Fan subdriver
1839  */
1840
1841 /*
1842  * FAN ACCESS MODES
1843  *
1844  * IBMACPI_FAN_RD_ACPI_GFAN:
1845  *      ACPI GFAN method: returns fan level
1846  *
1847  *      see IBMACPI_FAN_WR_ACPI_SFAN
1848  *      EC 0x2f not available if GFAN exists
1849  *
1850  * IBMACPI_FAN_WR_ACPI_SFAN:
1851  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
1852  *
1853  *      EC 0x2f might be available *for reading*, but never for writing.
1854  *
1855  * IBMACPI_FAN_WR_TPEC:
1856  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode Supported
1857  *      on almost all ThinkPads
1858  *
1859  *      Fan speed changes of any sort (including those caused by the
1860  *      disengaged mode) are usually done slowly by the firmware as the
1861  *      maximum ammount of fan duty cycle change per second seems to be
1862  *      limited.
1863  *
1864  *      Reading is not available if GFAN exists.
1865  *      Writing is not available if SFAN exists.
1866  *
1867  *      Bits
1868  *       7      automatic mode engaged;
1869  *              (default operation mode of the ThinkPad)
1870  *              fan level is ignored in this mode.
1871  *       6      disengage mode (takes precedence over bit 7);
1872  *              not available on all thinkpads.  May disable
1873  *              the tachometer, and speeds up fan to 100% duty-cycle,
1874  *              which speeds it up far above the standard RPM
1875  *              levels.  It is not impossible that it could cause
1876  *              hardware damage.
1877  *      5-3     unused in some models.  Extra bits for fan level
1878  *              in others, but still useless as all values above
1879  *              7 map to the same speed as level 7 in these models.
1880  *      2-0     fan level (0..7 usually)
1881  *                      0x00 = stop
1882  *                      0x07 = max (set when temperatures critical)
1883  *              Some ThinkPads may have other levels, see
1884  *              IBMACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
1885  *
1886  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
1887  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
1888  *      does so, its initial value is meaningless (0x07).
1889  *
1890  *      For firmware bugs, refer to:
1891  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
1892  *
1893  *      ----
1894  *
1895  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
1896  *      Main fan tachometer reading (in RPM)
1897  *
1898  *      This register is present on all ThinkPads with a new-style EC, and
1899  *      it is known not to be present on the A21m/e, and T22, as there is
1900  *      something else in offset 0x84 according to the ACPI DSDT.  Other
1901  *      ThinkPads from this same time period (and earlier) probably lack the
1902  *      tachometer as well.
1903  *
1904  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
1905  *      was never fixed by IBM to report the EC firmware version string
1906  *      probably support the tachometer (like the early X models), so
1907  *      detecting it is quite hard.  We need more data to know for sure.
1908  *
1909  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
1910  *      might result.
1911  *
1912  *      FIRMWARE BUG: when EC 0x2f bit 6 is set (disengaged mode), this
1913  *      register is not invalidated in ThinkPads that disable tachometer
1914  *      readings.  Thus, the tachometer readings go stale.
1915  *
1916  *      For firmware bugs, refer to:
1917  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
1918  *
1919  * IBMACPI_FAN_WR_ACPI_FANS:
1920  *      ThinkPad X31, X40, X41.  Not available in the X60.
1921  *
1922  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
1923  *      high speed.  ACPI DSDT seems to map these three speeds to levels
1924  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
1925  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
1926  *
1927  *      The speeds are stored on handles
1928  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
1929  *
1930  *      There are three default speed sets, acessible as handles:
1931  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
1932  *
1933  *      ACPI DSDT switches which set is in use depending on various
1934  *      factors.
1935  *
1936  *      IBMACPI_FAN_WR_TPEC is also available and should be used to
1937  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
1938  *      but the ACPI tables just mention level 7.
1939  */
1940
1941 static enum fan_status_access_mode fan_status_access_mode;
1942 static enum fan_control_access_mode fan_control_access_mode;
1943 static enum fan_control_commands fan_control_commands;
1944
1945 static int fan_control_status_known;
1946 static u8 fan_control_initial_status;
1947
1948 static void fan_watchdog_fire(struct work_struct *ignored);
1949 static int fan_watchdog_maxinterval;
1950 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
1951
1952 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
1953 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
1954            "\\FSPD",            /* 600e/x, 770e, 770x */
1955            );                   /* all others */
1956 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
1957            "JFNS",              /* 770x-JL */
1958            );                   /* all others */
1959
1960 static int fan_init(void)
1961 {
1962         fan_status_access_mode = IBMACPI_FAN_NONE;
1963         fan_control_access_mode = IBMACPI_FAN_WR_NONE;
1964         fan_control_commands = 0;
1965         fan_control_status_known = 1;
1966         fan_watchdog_maxinterval = 0;
1967
1968         if (gfan_handle) {
1969                 /* 570, 600e/x, 770e, 770x */
1970                 fan_status_access_mode = IBMACPI_FAN_RD_ACPI_GFAN;
1971         } else {
1972                 /* all other ThinkPads: note that even old-style
1973                  * ThinkPad ECs supports the fan control register */
1974                 if (likely(acpi_ec_read(fan_status_offset,
1975                                         &fan_control_initial_status))) {
1976                         fan_status_access_mode = IBMACPI_FAN_RD_TPEC;
1977
1978                         /* In some ThinkPads, neither the EC nor the ACPI
1979                          * DSDT initialize the fan status, and it ends up
1980                          * being set to 0x07 when it *could* be either
1981                          * 0x07 or 0x80.
1982                          *
1983                          * Enable for TP-1Y (T43), TP-78 (R51e),
1984                          * TP-76 (R52), TP-70 (T43, R52), which are known
1985                          * to be buggy. */
1986                         if (fan_control_initial_status == 0x07 &&
1987                             ibm_thinkpad_ec_found &&
1988                             ((ibm_thinkpad_ec_found[0] == '1' &&
1989                               ibm_thinkpad_ec_found[1] == 'Y') ||
1990                              (ibm_thinkpad_ec_found[0] == '7' &&
1991                               (ibm_thinkpad_ec_found[1] == '6' ||
1992                                ibm_thinkpad_ec_found[1] == '8' ||
1993                                ibm_thinkpad_ec_found[1] == '0'))
1994                             )) {
1995                                 printk(IBM_NOTICE
1996                                        "fan_init: initial fan status is "
1997                                        "unknown, assuming it is in auto "
1998                                        "mode\n");
1999                                 fan_control_status_known = 0;
2000                         }
2001                 } else {
2002                         printk(IBM_ERR
2003                                "ThinkPad ACPI EC access misbehaving, "
2004                                "fan status and control unavailable\n");
2005                         return 0;
2006                 }
2007         }
2008
2009         if (sfan_handle) {
2010                 /* 570, 770x-JL */
2011                 fan_control_access_mode = IBMACPI_FAN_WR_ACPI_SFAN;
2012                 fan_control_commands |=
2013                     IBMACPI_FAN_CMD_LEVEL | IBMACPI_FAN_CMD_ENABLE;
2014         } else {
2015                 if (!gfan_handle) {
2016                         /* gfan without sfan means no fan control */
2017                         /* all other models implement TP EC 0x2f control */
2018
2019                         if (fans_handle) {
2020                                 /* X31, X40, X41 */
2021                                 fan_control_access_mode =
2022                                     IBMACPI_FAN_WR_ACPI_FANS;
2023                                 fan_control_commands |=
2024                                     IBMACPI_FAN_CMD_SPEED |
2025                                     IBMACPI_FAN_CMD_LEVEL |
2026                                     IBMACPI_FAN_CMD_ENABLE;
2027                         } else {
2028                                 fan_control_access_mode = IBMACPI_FAN_WR_TPEC;
2029                                 fan_control_commands |=
2030                                     IBMACPI_FAN_CMD_LEVEL |
2031                                     IBMACPI_FAN_CMD_ENABLE;
2032                         }
2033                 }
2034         }
2035
2036         return 0;
2037 }
2038
2039 static int fan_get_status(u8 *status)
2040 {
2041         u8 s;
2042
2043         /* TODO:
2044          * Add IBMACPI_FAN_RD_ACPI_FANS ? */
2045
2046         switch (fan_status_access_mode) {
2047         case IBMACPI_FAN_RD_ACPI_GFAN:
2048                 /* 570, 600e/x, 770e, 770x */
2049
2050                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2051                         return -EIO;
2052
2053                 if (likely(status))
2054                         *status = s & 0x07;
2055
2056                 break;
2057
2058         case IBMACPI_FAN_RD_TPEC:
2059                 /* all except 570, 600e/x, 770e, 770x */
2060                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2061                         return -EIO;
2062
2063                 if (likely(status))
2064                         *status = s;
2065
2066                 break;
2067
2068         default:
2069                 return -ENXIO;
2070         }
2071
2072         return 0;
2073 }
2074
2075 static void fan_exit(void)
2076 {
2077         cancel_delayed_work(&fan_watchdog_task);
2078         flush_scheduled_work();
2079 }
2080
2081 static int fan_get_speed(unsigned int *speed)
2082 {
2083         u8 hi, lo;
2084
2085         switch (fan_status_access_mode) {
2086         case IBMACPI_FAN_RD_TPEC:
2087                 /* all except 570, 600e/x, 770e, 770x */
2088                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2089                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2090                         return -EIO;
2091
2092                 if (likely(speed))
2093                         *speed = (hi << 8) | lo;
2094
2095                 break;
2096
2097         default:
2098                 return -ENXIO;
2099         }
2100
2101         return 0;
2102 }
2103
2104 static void fan_watchdog_fire(struct work_struct *ignored)
2105 {
2106         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2107         if (fan_set_enable()) {
2108                 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2109                 /* reschedule for later */
2110                 fan_watchdog_reset();
2111         }
2112 }
2113
2114 static void fan_watchdog_reset(void)
2115 {
2116         static int fan_watchdog_active = 0;
2117
2118         if (fan_watchdog_active)
2119                 cancel_delayed_work(&fan_watchdog_task);
2120
2121         if (fan_watchdog_maxinterval > 0) {
2122                 fan_watchdog_active = 1;
2123                 if (!schedule_delayed_work(&fan_watchdog_task,
2124                                 msecs_to_jiffies(fan_watchdog_maxinterval
2125                                                  * 1000))) {
2126                         printk(IBM_ERR "failed to schedule the fan watchdog, "
2127                                "watchdog will not trigger\n");
2128                 }
2129         } else
2130                 fan_watchdog_active = 0;
2131 }
2132
2133 static int fan_set_level(int level)
2134 {
2135         switch (fan_control_access_mode) {
2136         case IBMACPI_FAN_WR_ACPI_SFAN:
2137                 if (level >= 0 && level <= 7) {
2138                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2139                                 return -EIO;
2140                 } else
2141                         return -EINVAL;
2142                 break;
2143
2144         case IBMACPI_FAN_WR_ACPI_FANS:
2145         case IBMACPI_FAN_WR_TPEC:
2146                 if ((level != IBMACPI_FAN_EC_AUTO) &&
2147                     (level != IBMACPI_FAN_EC_DISENGAGED) &&
2148                     ((level < 0) || (level > 7)))
2149                         return -EINVAL;
2150
2151                 if (!acpi_ec_write(fan_status_offset, level))
2152                         return -EIO;
2153                 else
2154                         fan_control_status_known = 1;
2155                 break;
2156
2157         default:
2158                 return -ENXIO;
2159         }
2160         return 0;
2161 }
2162
2163 static int fan_set_enable(void)
2164 {
2165         u8 s;
2166         int rc;
2167
2168         switch (fan_control_access_mode) {
2169         case IBMACPI_FAN_WR_ACPI_FANS:
2170         case IBMACPI_FAN_WR_TPEC:
2171                 if ((rc = fan_get_status(&s)) < 0)
2172                         return rc;
2173
2174                 /* Don't go out of emergency fan mode */
2175                 if (s != 7)
2176                         s = IBMACPI_FAN_EC_AUTO;
2177
2178                 if (!acpi_ec_write(fan_status_offset, s))
2179                         return -EIO;
2180                 else
2181                         fan_control_status_known = 1;
2182                 break;
2183
2184         case IBMACPI_FAN_WR_ACPI_SFAN:
2185                 if ((rc = fan_get_status(&s)) < 0)
2186                         return rc;
2187
2188                 s &= 0x07;
2189
2190                 /* Set fan to at least level 4 */
2191                 if (s < 4)
2192                         s = 4;
2193
2194                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2195                         return -EIO;
2196                 break;
2197
2198         default:
2199                 return -ENXIO;
2200         }
2201         return 0;
2202 }
2203
2204 static int fan_set_disable(void)
2205 {
2206         switch (fan_control_access_mode) {
2207         case IBMACPI_FAN_WR_ACPI_FANS:
2208         case IBMACPI_FAN_WR_TPEC:
2209                 if (!acpi_ec_write(fan_status_offset, 0x00))
2210                         return -EIO;
2211                 else
2212                         fan_control_status_known = 1;
2213                 break;
2214
2215         case IBMACPI_FAN_WR_ACPI_SFAN:
2216                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2217                         return -EIO;
2218                 break;
2219
2220         default:
2221                 return -ENXIO;
2222         }
2223         return 0;
2224 }
2225
2226 static int fan_set_speed(int speed)
2227 {
2228         switch (fan_control_access_mode) {
2229         case IBMACPI_FAN_WR_ACPI_FANS:
2230                 if (speed >= 0 && speed <= 65535) {
2231                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2232                                         speed, speed, speed))
2233                                 return -EIO;
2234                 } else
2235                         return -EINVAL;
2236                 break;
2237
2238         default:
2239                 return -ENXIO;
2240         }
2241         return 0;
2242 }
2243
2244 static int fan_read(char *p)
2245 {
2246         int len = 0;
2247         int rc;
2248         u8 status;
2249         unsigned int speed = 0;
2250
2251         switch (fan_status_access_mode) {
2252         case IBMACPI_FAN_RD_ACPI_GFAN:
2253                 /* 570, 600e/x, 770e, 770x */
2254                 if ((rc = fan_get_status(&status)) < 0)
2255                         return rc;
2256
2257                 len += sprintf(p + len, "status:\t\t%s\n"
2258                                "level:\t\t%d\n",
2259                                (status != 0) ? "enabled" : "disabled", status);
2260                 break;
2261
2262         case IBMACPI_FAN_RD_TPEC:
2263                 /* all except 570, 600e/x, 770e, 770x */
2264                 if ((rc = fan_get_status(&status)) < 0)
2265                         return rc;
2266
2267                 if (unlikely(!fan_control_status_known)) {
2268                         if (status != fan_control_initial_status)
2269                                 fan_control_status_known = 1;
2270                         else
2271                                 /* Return most likely status. In fact, it
2272                                  * might be the only possible status */
2273                                 status = IBMACPI_FAN_EC_AUTO;
2274                 }
2275
2276                 len += sprintf(p + len, "status:\t\t%s\n",
2277                                (status != 0) ? "enabled" : "disabled");
2278
2279                 /* No ThinkPad boots on disengaged mode, we can safely
2280                  * assume the tachometer is online if fan control status
2281                  * was unknown */
2282                 if ((rc = fan_get_speed(&speed)) < 0)
2283                         return rc;
2284
2285                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2286
2287                 if (status & IBMACPI_FAN_EC_DISENGAGED)
2288                         /* Disengaged mode takes precedence */
2289                         len += sprintf(p + len, "level:\t\tdisengaged\n");
2290                 else if (status & IBMACPI_FAN_EC_AUTO)
2291                         len += sprintf(p + len, "level:\t\tauto\n");
2292                 else
2293                         len += sprintf(p + len, "level:\t\t%d\n", status);
2294                 break;
2295
2296         case IBMACPI_FAN_NONE:
2297         default:
2298                 len += sprintf(p + len, "status:\t\tnot supported\n");
2299         }
2300
2301         if (fan_control_commands & IBMACPI_FAN_CMD_LEVEL) {
2302                 len += sprintf(p + len, "commands:\tlevel <level>");
2303
2304                 switch (fan_control_access_mode) {
2305                 case IBMACPI_FAN_WR_ACPI_SFAN:
2306                         len += sprintf(p + len, " (<level> is 0-7)\n");
2307                         break;
2308
2309                 default:
2310                         len += sprintf(p + len, " (<level> is 0-7, "
2311                                        "auto, disengaged)\n");
2312                         break;
2313                 }
2314         }
2315
2316         if (fan_control_commands & IBMACPI_FAN_CMD_ENABLE)
2317                 len += sprintf(p + len, "commands:\tenable, disable\n"
2318                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2319                                "1-120 (seconds))\n");
2320
2321         if (fan_control_commands & IBMACPI_FAN_CMD_SPEED)
2322                 len += sprintf(p + len, "commands:\tspeed <speed>"
2323                                " (<speed> is 0-65535)\n");
2324
2325         return len;
2326 }
2327
2328 static int fan_write_cmd_level(const char *cmd, int *rc)
2329 {
2330         int level;
2331
2332         if (strlencmp(cmd, "level auto") == 0)
2333                 level = IBMACPI_FAN_EC_AUTO;
2334         else if (strlencmp(cmd, "level disengaged") == 0)
2335                 level = IBMACPI_FAN_EC_DISENGAGED;
2336         else if (sscanf(cmd, "level %d", &level) != 1)
2337                 return 0;
2338
2339         if ((*rc = fan_set_level(level)) == -ENXIO)
2340                 printk(IBM_ERR "level command accepted for unsupported "
2341                        "access mode %d", fan_control_access_mode);
2342
2343         return 1;
2344 }
2345
2346 static int fan_write_cmd_enable(const char *cmd, int *rc)
2347 {
2348         if (strlencmp(cmd, "enable") != 0)
2349                 return 0;
2350
2351         if ((*rc = fan_set_enable()) == -ENXIO)
2352                 printk(IBM_ERR "enable command accepted for unsupported "
2353                        "access mode %d", fan_control_access_mode);
2354
2355         return 1;
2356 }
2357
2358 static int fan_write_cmd_disable(const char *cmd, int *rc)
2359 {
2360         if (strlencmp(cmd, "disable") != 0)
2361                 return 0;
2362
2363         if ((*rc = fan_set_disable()) == -ENXIO)
2364                 printk(IBM_ERR "disable command accepted for unsupported "
2365                        "access mode %d", fan_control_access_mode);
2366
2367         return 1;
2368 }
2369
2370 static int fan_write_cmd_speed(const char *cmd, int *rc)
2371 {
2372         int speed;
2373
2374         /* TODO:
2375          * Support speed <low> <medium> <high> ? */
2376
2377         if (sscanf(cmd, "speed %d", &speed) != 1)
2378                 return 0;
2379
2380         if ((*rc = fan_set_speed(speed)) == -ENXIO)
2381                 printk(IBM_ERR "speed command accepted for unsupported "
2382                        "access mode %d", fan_control_access_mode);
2383
2384         return 1;
2385 }
2386
2387 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2388 {
2389         int interval;
2390
2391         if (sscanf(cmd, "watchdog %d", &interval) != 1)
2392                 return 0;
2393
2394         if (interval < 0 || interval > 120)
2395                 *rc = -EINVAL;
2396         else
2397                 fan_watchdog_maxinterval = interval;
2398
2399         return 1;
2400 }
2401
2402 static int fan_write(char *buf)
2403 {
2404         char *cmd;
2405         int rc = 0;
2406
2407         while (!rc && (cmd = next_cmd(&buf))) {
2408                 if (!((fan_control_commands & IBMACPI_FAN_CMD_LEVEL) &&
2409                       fan_write_cmd_level(cmd, &rc)) &&
2410                     !((fan_control_commands & IBMACPI_FAN_CMD_ENABLE) &&
2411                       (fan_write_cmd_enable(cmd, &rc) ||
2412                        fan_write_cmd_disable(cmd, &rc) ||
2413                        fan_write_cmd_watchdog(cmd, &rc))) &&
2414                     !((fan_control_commands & IBMACPI_FAN_CMD_SPEED) &&
2415                       fan_write_cmd_speed(cmd, &rc))
2416                     )
2417                         rc = -EINVAL;
2418                 else if (!rc)
2419                         fan_watchdog_reset();
2420         }
2421
2422         return rc;
2423 }
2424
2425 /****************************************************************************
2426  ****************************************************************************
2427  *
2428  * Infrastructure
2429  *
2430  ****************************************************************************
2431  ****************************************************************************/
2432
2433 /* /proc support */
2434 static struct proc_dir_entry *proc_dir = NULL;
2435
2436 /* Subdriver registry */
2437 static struct ibm_struct ibms[] = {
2438         {
2439          .name = "driver",
2440          .init = ibm_acpi_driver_init,
2441          .read = ibm_acpi_driver_read,
2442          },
2443         {
2444          .name = "hotkey",
2445          .hid = IBM_HKEY_HID,
2446          .init = hotkey_init,
2447          .read = hotkey_read,
2448          .write = hotkey_write,
2449          .exit = hotkey_exit,
2450          .notify = hotkey_notify,
2451          .handle = &hkey_handle,
2452          .type = ACPI_DEVICE_NOTIFY,
2453          },
2454         {
2455          .name = "bluetooth",
2456          .init = bluetooth_init,
2457          .read = bluetooth_read,
2458          .write = bluetooth_write,
2459          },
2460         {
2461          .name = "wan",
2462          .init = wan_init,
2463          .read = wan_read,
2464          .write = wan_write,
2465          .experimental = 1,
2466          },
2467         {
2468          .name = "video",
2469          .init = video_init,
2470          .read = video_read,
2471          .write = video_write,
2472          .exit = video_exit,
2473          },
2474         {
2475          .name = "light",
2476          .init = light_init,
2477          .read = light_read,
2478          .write = light_write,
2479          },
2480 #ifdef CONFIG_ACPI_IBM_DOCK
2481         {
2482          .name = "dock",
2483          .read = dock_read,
2484          .write = dock_write,
2485          .notify = dock_notify,
2486          .handle = &dock_handle,
2487          .type = ACPI_SYSTEM_NOTIFY,
2488          },
2489         {
2490          .name = "dock",
2491          .hid = IBM_PCI_HID,
2492          .notify = dock_notify,
2493          .handle = &pci_handle,
2494          .type = ACPI_SYSTEM_NOTIFY,
2495          },
2496 #endif
2497 #ifdef CONFIG_ACPI_IBM_BAY
2498         {
2499          .name = "bay",
2500          .init = bay_init,
2501          .read = bay_read,
2502          .write = bay_write,
2503          .notify = bay_notify,
2504          .handle = &bay_handle,
2505          .type = ACPI_SYSTEM_NOTIFY,
2506          },
2507 #endif /* CONFIG_ACPI_IBM_BAY */
2508         {
2509          .name = "cmos",
2510          .read = cmos_read,
2511          .write = cmos_write,
2512          },
2513         {
2514          .name = "led",
2515          .init = led_init,
2516          .read = led_read,
2517          .write = led_write,
2518          },
2519         {
2520          .name = "beep",
2521          .read = beep_read,
2522          .write = beep_write,
2523          },
2524         {
2525          .name = "thermal",
2526          .init = thermal_init,
2527          .read = thermal_read,
2528          },
2529         {
2530          .name = "ecdump",
2531          .read = ecdump_read,
2532          .write = ecdump_write,
2533          .experimental = 1,
2534          },
2535         {
2536          .name = "brightness",
2537          .read = brightness_read,
2538          .write = brightness_write,
2539          .init = brightness_init,
2540          .exit = brightness_exit,
2541          },
2542         {
2543          .name = "volume",
2544          .read = volume_read,
2545          .write = volume_write,
2546          },
2547         {
2548          .name = "fan",
2549          .read = fan_read,
2550          .write = fan_write,
2551          .init = fan_init,
2552          .exit = fan_exit,
2553          .experimental = 1,
2554          },
2555 };
2556
2557 /*
2558  * Module and infrastructure proble, init and exit handling
2559  */
2560
2561 static int __init ibm_init(struct ibm_struct *ibm)
2562 {
2563         int ret;
2564         struct proc_dir_entry *entry;
2565
2566         if (ibm->experimental && !experimental)
2567                 return 0;
2568
2569         if (ibm->hid) {
2570                 ret = register_ibmacpi_subdriver(ibm);
2571                 if (ret < 0)
2572                         return ret;
2573                 ibm->driver_registered = 1;
2574         }
2575
2576         if (ibm->init) {
2577                 ret = ibm->init();
2578                 if (ret != 0)
2579                         return ret;
2580                 ibm->init_called = 1;
2581         }
2582
2583         if (ibm->read) {
2584                 entry = create_proc_entry(ibm->name,
2585                                           S_IFREG | S_IRUGO | S_IWUSR,
2586                                           proc_dir);
2587                 if (!entry) {
2588                         printk(IBM_ERR "unable to create proc entry %s\n",
2589                                ibm->name);
2590                         return -ENODEV;
2591                 }
2592                 entry->owner = THIS_MODULE;
2593                 entry->data = ibm;
2594                 entry->read_proc = &dispatch_read;
2595                 if (ibm->write)
2596                         entry->write_proc = &dispatch_write;
2597                 ibm->proc_created = 1;
2598         }
2599
2600         if (ibm->notify) {
2601                 ret = setup_notify(ibm);
2602                 if (ret == -ENODEV) {
2603                         printk(IBM_NOTICE "disabling subdriver %s\n",
2604                                 ibm->name);
2605                         ibm_exit(ibm);
2606                         return 0;
2607                 }
2608                 if (ret < 0)
2609                         return ret;
2610         }
2611
2612         return 0;
2613 }
2614
2615 static void ibm_exit(struct ibm_struct *ibm)
2616 {
2617         if (ibm->notify_installed)
2618                 acpi_remove_notify_handler(*ibm->handle, ibm->type,
2619                                            dispatch_notify);
2620
2621         if (ibm->proc_created)
2622                 remove_proc_entry(ibm->name, proc_dir);
2623
2624         if (ibm->init_called && ibm->exit)
2625                 ibm->exit();
2626
2627         if (ibm->driver_registered) {
2628                 acpi_bus_unregister_driver(ibm->driver);
2629                 kfree(ibm->driver);
2630         }
2631 }
2632
2633 /* Probing */
2634
2635 static char *ibm_thinkpad_ec_found = NULL;
2636
2637 static char* __init check_dmi_for_ec(void)
2638 {
2639         struct dmi_device *dev = NULL;
2640         char ec_fw_string[18];
2641
2642         /*
2643          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2644          * X32 or newer, all Z series;  Some models must have an
2645          * up-to-date BIOS or they will not be detected.
2646          *
2647          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2648          */
2649         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2650                 if (sscanf(dev->name,
2651                            "IBM ThinkPad Embedded Controller -[%17c",
2652                            ec_fw_string) == 1) {
2653                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2654                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2655                         return kstrdup(ec_fw_string, GFP_KERNEL);
2656                 }
2657         }
2658         return NULL;
2659 }
2660
2661 /* Module init, exit, parameters */
2662
2663 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
2664 {
2665         unsigned int i;
2666
2667         for (i = 0; i < ARRAY_SIZE(ibms); i++)
2668                 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
2669                         if (strlen(val) > sizeof(ibms[i].param) - 2)
2670                                 return -ENOSPC;
2671                         strcpy(ibms[i].param, val);
2672                         strcat(ibms[i].param, ",");
2673                         return 0;
2674                 }
2675
2676         return -EINVAL;
2677 }
2678
2679 static int experimental;
2680 module_param(experimental, int, 0);
2681
2682 #define IBM_PARAM(feature) \
2683         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
2684
2685 IBM_PARAM(hotkey);
2686 IBM_PARAM(bluetooth);
2687 IBM_PARAM(video);
2688 IBM_PARAM(light);
2689 #ifdef CONFIG_ACPI_IBM_DOCK
2690 IBM_PARAM(dock);
2691 #endif
2692 #ifdef CONFIG_ACPI_IBM_BAY
2693 IBM_PARAM(bay);
2694 #endif /* CONFIG_ACPI_IBM_BAY */
2695 IBM_PARAM(cmos);
2696 IBM_PARAM(led);
2697 IBM_PARAM(beep);
2698 IBM_PARAM(ecdump);
2699 IBM_PARAM(brightness);
2700 IBM_PARAM(volume);
2701 IBM_PARAM(fan);
2702
2703 static int __init acpi_ibm_init(void)
2704 {
2705         int ret, i;
2706
2707         if (acpi_disabled)
2708                 return -ENODEV;
2709
2710         /* ec is required because many other handles are relative to it */
2711         IBM_HANDLE_INIT(ec);
2712         if (!ec_handle) {
2713                 printk(IBM_ERR "ec object not found\n");
2714                 return -ENODEV;
2715         }
2716
2717         /* Models with newer firmware report the EC in DMI */
2718         ibm_thinkpad_ec_found = check_dmi_for_ec();
2719
2720         /* these handles are not required */
2721         IBM_HANDLE_INIT(vid);
2722         IBM_HANDLE_INIT(vid2);
2723         IBM_HANDLE_INIT(ledb);
2724         IBM_HANDLE_INIT(led);
2725         IBM_HANDLE_INIT(hkey);
2726         IBM_HANDLE_INIT(lght);
2727         IBM_HANDLE_INIT(cmos);
2728 #ifdef CONFIG_ACPI_IBM_DOCK
2729         IBM_HANDLE_INIT(dock);
2730 #endif
2731         IBM_HANDLE_INIT(pci);
2732 #ifdef CONFIG_ACPI_IBM_BAY
2733         IBM_HANDLE_INIT(bay);
2734         if (bay_handle)
2735                 IBM_HANDLE_INIT(bay_ej);
2736         IBM_HANDLE_INIT(bay2);
2737         if (bay2_handle)
2738                 IBM_HANDLE_INIT(bay2_ej);
2739 #endif /* CONFIG_ACPI_IBM_BAY */
2740         IBM_HANDLE_INIT(beep);
2741         IBM_HANDLE_INIT(ecrd);
2742         IBM_HANDLE_INIT(ecwr);
2743         IBM_HANDLE_INIT(fans);
2744         IBM_HANDLE_INIT(gfan);
2745         IBM_HANDLE_INIT(sfan);
2746
2747         proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
2748         if (!proc_dir) {
2749                 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
2750                 acpi_ibm_exit();
2751                 return -ENODEV;
2752         }
2753         proc_dir->owner = THIS_MODULE;
2754
2755         for (i = 0; i < ARRAY_SIZE(ibms); i++) {
2756                 ret = ibm_init(&ibms[i]);
2757                 if (ret >= 0 && *ibms[i].param)
2758                         ret = ibms[i].write(ibms[i].param);
2759                 if (ret < 0) {
2760                         acpi_ibm_exit();
2761                         return ret;
2762                 }
2763         }
2764
2765         return 0;
2766 }
2767
2768 static void acpi_ibm_exit(void)
2769 {
2770         int i;
2771
2772         for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
2773                 ibm_exit(&ibms[i]);
2774
2775         if (proc_dir)
2776                 remove_proc_entry(IBM_DIR, acpi_root_dir);
2777
2778         if (ibm_thinkpad_ec_found)
2779                 kfree(ibm_thinkpad_ec_found);
2780 }
2781
2782 module_init(acpi_ibm_init);
2783 module_exit(acpi_ibm_exit);