drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 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 "0.14"
  25
  26 /*
  27  *  Changelog:
  28  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  29  *                      drivers/misc.
  30  *
  31  *  2006-11-22  0.13    new maintainer
  32  *                      changelog now lives in git commit history, and will
  33  *                      not be updated further in-file.
  34  *
  35  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  36  *  2005-03-17  0.11    support for 600e, 770x
  37  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  38  *                      support for 770e, G41
  39  *                      G40 and G41 don't have a thinklight
  40  *                      temperatures no longer experimental
  41  *                      experimental brightness control
  42  *                      experimental volume control
  43  *                      experimental fan enable/disable
  44  *  2005-01-16  0.10    fix module loading on R30, R31
  45  *  2005-01-16  0.9     support for 570, R30, R31
  46  *                      ultrabay support on A22p, A3x
  47  *                      limit arg for cmos, led, beep, drop experimental status
  48  *                      more capable led control on A21e, A22p, T20-22, X20
  49  *                      experimental temperatures and fan speed
  50  *                      experimental embedded controller register dump
  51  *                      mark more functions as __init, drop incorrect __exit
  52  *                      use MODULE_VERSION
  53  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  54  *                      fix parameter passing on module loading
  55  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  56  *                          thanks to Jim Radford <radford@blackbean.org>
  57  *  2004-11-08  0.8     fix init error case, don't return from a macro
  58  *                          thanks to Chris Wright <chrisw@osdl.org>
  59  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  60  *                      fix led control on A21e
  61  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  62  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  63  *                      proc file format changed
  64  *                      video_switch command
  65  *                      experimental cmos control
  66  *                      experimental led control
  67  *                      experimental acpi sounds
  68  *  2004-09-16  0.4     support for module parameters
  69  *                      hotkey mask can be prefixed by 0x
  70  *                      video output switching
  71  *                      video expansion control
  72  *                      ultrabay eject support
  73  *                      removed lcd brightness/on/off control, didn't work
  74  *  2004-08-17  0.3     support for R40
  75  *                      lcd off, brightness control
  76  *                      thinklight on/off
  77  *  2004-08-14  0.2     support for T series, X20
  78  *                      bluetooth enable/disable
  79  *                      hotkey events disabled by default
  80  *                      removed fan control, currently useless
  81  *  2004-08-09  0.1     initial release, support for X series
  82  */
  83
  84 #include "thinkpad_acpi.h"
  85
  86 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  87 MODULE_DESCRIPTION(IBM_DESC);
  88 MODULE_VERSION(IBM_VERSION);
  89 MODULE_LICENSE("GPL");
  90
  91 /* Please remove this in year 2009 */
  92 MODULE_ALIAS("ibm_acpi");
  93
  94 #define __unused __attribute__ ((unused))
  95
  96 /****************************************************************************
  97  ****************************************************************************
  98  *
  99  * ACPI Helpers and device model
 100  *
 101  ****************************************************************************
 102  ****************************************************************************/
 103
 104 /*************************************************************************
 105  * ACPI basic handles
 106  */
 107
 108 static acpi_handle root_handle = NULL;
 109
 110 #define IBM_HANDLE(object, parent, paths...)                    \
 111         static acpi_handle  object##_handle;                    \
 112         static acpi_handle *object##_parent = &parent##_handle; \
 113         static char        *object##_path;                      \
 114         static char        *object##_paths[] = { paths }
 115
 116 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 117            "\\_SB.PCI.ISA.EC",  /* 570 */
 118            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 119            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 120            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 121            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 122            "\\_SB.PCI0.LPC.EC", /* all others */
 123            );
 124
 125 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 126 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 127
 128
 129 /*************************************************************************
 130  * Misc ACPI handles
 131  */
 132
 133 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 134            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 135            "\\CMS",             /* R40, R40e */
 136            );                   /* all others */
 137
 138 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 139            "^HKEY",             /* R30, R31 */
 140            "HKEY",              /* all others */
 141            );                   /* 570 */
 142
 143
 144 /*************************************************************************
 145  * ACPI helpers
 146  */
 147
 148 static int acpi_evalf(acpi_handle handle,
 149                       void *res, char *method, char *fmt, ...)
 150 {
 151         char *fmt0 = fmt;
 152         struct acpi_object_list params;
 153         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 154         struct acpi_buffer result, *resultp;
 155         union acpi_object out_obj;
 156         acpi_status status;
 157         va_list ap;
 158         char res_type;
 159         int success;
 160         int quiet;
 161
 162         if (!*fmt) {
 163                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 164                 return 0;
 165         }
 166
 167         if (*fmt == 'q') {
 168                 quiet = 1;
 169                 fmt++;
 170         } else
 171                 quiet = 0;
 172
 173         res_type = *(fmt++);
 174
 175         params.count = 0;
 176         params.pointer = &in_objs[0];
 177
 178         va_start(ap, fmt);
 179         while (*fmt) {
 180                 char c = *(fmt++);
 181                 switch (c) {
 182                 case 'd':       /* int */
 183                         in_objs[params.count].integer.value = va_arg(ap, int);
 184                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 185                         break;
 186                         /* add more types as needed */
 187                 default:
 188                         printk(IBM_ERR "acpi_evalf() called "
 189                                "with invalid format character '%c'\n", c);
 190                         return 0;
 191                 }
 192         }
 193         va_end(ap);
 194
 195         if (res_type != 'v') {
 196                 result.length = sizeof(out_obj);
 197                 result.pointer = &out_obj;
 198                 resultp = &result;
 199         } else
 200                 resultp = NULL;
 201
 202         status = acpi_evaluate_object(handle, method, &params, resultp);
 203
 204         switch (res_type) {
 205         case 'd':               /* int */
 206                 if (res)
 207                         *(int *)res = out_obj.integer.value;
 208                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 209                 break;
 210         case 'v':               /* void */
 211                 success = status == AE_OK;
 212                 break;
 213                 /* add more types as needed */
 214         default:
 215                 printk(IBM_ERR "acpi_evalf() called "
 216                        "with invalid format character '%c'\n", res_type);
 217                 return 0;
 218         }
 219
 220         if (!success && !quiet)
 221                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 222                        method, fmt0, status);
 223
 224         return success;
 225 }
 226
 227 static void __unused acpi_print_int(acpi_handle handle, char *method)
 228 {
 229         int i;
 230
 231         if (acpi_evalf(handle, &i, method, "d"))
 232                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 233         else
 234                 printk(IBM_ERR "error calling %s\n", method);
 235 }
 236
 237 static int acpi_ec_read(int i, u8 * p)
 238 {
 239         int v;
 240
 241         if (ecrd_handle) {
 242                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 243                         return 0;
 244                 *p = v;
 245         } else {
 246                 if (ec_read(i, p) < 0)
 247                         return 0;
 248         }
 249
 250         return 1;
 251 }
 252
 253 static int acpi_ec_write(int i, u8 v)
 254 {
 255         if (ecwr_handle) {
 256                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 257                         return 0;
 258         } else {
 259                 if (ec_write(i, v) < 0)
 260                         return 0;
 261         }
 262
 263         return 1;
 264 }
 265
 266 static int _sta(acpi_handle handle)
 267 {
 268         int status;
 269
 270         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 271                 status = 0;
 272
 273         return status;
 274 }
 275
 276 /*************************************************************************
 277  * ACPI device model
 278  */
 279
 280 static void drv_acpi_handle_init(char *name,
 281                            acpi_handle *handle, acpi_handle parent,
 282                            char **paths, int num_paths, char **path)
 283 {
 284         int i;
 285         acpi_status status;
 286
 287         for (i = 0; i < num_paths; i++) {
 288                 status = acpi_get_handle(parent, paths[i], handle);
 289                 if (ACPI_SUCCESS(status)) {
 290                         *path = paths[i];
 291                         return;
 292                 }
 293         }
 294
 295         *handle = NULL;
 296 }
 297
 298 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 299 {
 300         struct ibm_struct *ibm = data;
 301
 302         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 303                 return;
 304
 305         ibm->acpi->notify(ibm, event);
 306 }
 307
 308 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 309 {
 310         acpi_status status;
 311         int ret;
 312
 313         BUG_ON(!ibm->acpi);
 314
 315         if (!*ibm->acpi->handle)
 316                 return 0;
 317
 318         dbg_printk(TPACPI_DBG_INIT,
 319                 "setting up ACPI notify for %s\n", ibm->name);
 320
 321         ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 322         if (ret < 0) {
 323                 printk(IBM_ERR "%s device not present\n", ibm->name);
 324                 return -ENODEV;
 325         }
 326
 327         acpi_driver_data(ibm->acpi->device) = ibm;
 328         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 329                 IBM_ACPI_EVENT_PREFIX,
 330                 ibm->name);
 331
 332         status = acpi_install_notify_handler(*ibm->acpi->handle,
 333                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 334         if (ACPI_FAILURE(status)) {
 335                 if (status == AE_ALREADY_EXISTS) {
 336                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 337                                 ibm->name);
 338                 } else {
 339                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 340                                 ibm->name, status);
 341                 }
 342                 return -ENODEV;
 343         }
 344         ibm->flags.acpi_notify_installed = 1;
 345         return 0;
 346 }
 347
 348 static int __init tpacpi_device_add(struct acpi_device *device)
 349 {
 350         return 0;
 351 }
 352
 353 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 354 {
 355         int ret;
 356
 357         dbg_printk(TPACPI_DBG_INIT,
 358                 "registering %s as an ACPI driver\n", ibm->name);
 359
 360         BUG_ON(!ibm->acpi);
 361
 362         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 363         if (!ibm->acpi->driver) {
 364                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 365                 return -ENOMEM;
 366         }
 367
 368         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 369         ibm->acpi->driver->ids = ibm->acpi->hid;
 370         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 371
 372         ret = acpi_bus_register_driver(ibm->acpi->driver);
 373         if (ret < 0) {
 374                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 375                        ibm->acpi->hid, ret);
 376                 kfree(ibm->acpi->driver);
 377                 ibm->acpi->driver = NULL;
 378         } else if (!ret)
 379                 ibm->flags.acpi_driver_registered = 1;
 380
 381         return ret;
 382 }
 383
 384
 385 /****************************************************************************
 386  ****************************************************************************
 387  *
 388  * Procfs Helpers
 389  *
 390  ****************************************************************************
 391  ****************************************************************************/
 392
 393 static int dispatch_procfs_read(char *page, char **start, off_t off,
 394                         int count, int *eof, void *data)
 395 {
 396         struct ibm_struct *ibm = data;
 397         int len;
 398
 399         if (!ibm || !ibm->read)
 400                 return -EINVAL;
 401
 402         len = ibm->read(page);
 403         if (len < 0)
 404                 return len;
 405
 406         if (len <= off + count)
 407                 *eof = 1;
 408         *start = page + off;
 409         len -= off;
 410         if (len > count)
 411                 len = count;
 412         if (len < 0)
 413                 len = 0;
 414
 415         return len;
 416 }
 417
 418 static int dispatch_procfs_write(struct file *file,
 419                         const char __user * userbuf,
 420                         unsigned long count, void *data)
 421 {
 422         struct ibm_struct *ibm = data;
 423         char *kernbuf;
 424         int ret;
 425
 426         if (!ibm || !ibm->write)
 427                 return -EINVAL;
 428
 429         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 430         if (!kernbuf)
 431                 return -ENOMEM;
 432
 433         if (copy_from_user(kernbuf, userbuf, count)) {
 434                 kfree(kernbuf);
 435                 return -EFAULT;
 436         }
 437
 438         kernbuf[count] = 0;
 439         strcat(kernbuf, ",");
 440         ret = ibm->write(kernbuf);
 441         if (ret == 0)
 442                 ret = count;
 443
 444         kfree(kernbuf);
 445
 446         return ret;
 447 }
 448
 449 static char *next_cmd(char **cmds)
 450 {
 451         char *start = *cmds;
 452         char *end;
 453
 454         while ((end = strchr(start, ',')) && end == start)
 455                 start = end + 1;
 456
 457         if (!end)
 458                 return NULL;
 459
 460         *end = 0;
 461         *cmds = end + 1;
 462         return start;
 463 }
 464
 465
 466 /****************************************************************************
 467  ****************************************************************************
 468  *
 469  * Subdrivers
 470  *
 471  ****************************************************************************
 472  ****************************************************************************/
 473
 474 /*************************************************************************
 475  * thinkpad-acpi init subdriver
 476  */
 477
 478 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 479 {
 480         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 481         printk(IBM_INFO "%s\n", IBM_URL);
 482
 483         if (ibm_thinkpad_ec_found)
 484                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 485                        ibm_thinkpad_ec_found);
 486
 487         return 0;
 488 }
 489
 490 static int thinkpad_acpi_driver_read(char *p)
 491 {
 492         int len = 0;
 493
 494         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 495         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 496
 497         return len;
 498 }
 499
 500 static struct ibm_struct thinkpad_acpi_driver_data = {
 501         .name = "driver",
 502         .read = thinkpad_acpi_driver_read,
 503 };
 504
 505 /*************************************************************************
 506  * Hotkey subdriver
 507  */
 508
 509 static int hotkey_orig_status;
 510 static int hotkey_orig_mask;
 511
 512 static int __init hotkey_init(struct ibm_init_struct *iibm)
 513 {
 514         int res;
 515
 516         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 517
 518         IBM_ACPIHANDLE_INIT(hkey);
 519
 520         /* hotkey not supported on 570 */
 521         tp_features.hotkey = hkey_handle != NULL;
 522
 523         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 524                 str_supported(tp_features.hotkey));
 525
 526         if (tp_features.hotkey) {
 527                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 528                    A30, R30, R31, T20-22, X20-21, X22-24 */
 529                 tp_features.hotkey_mask =
 530                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 531
 532                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 533                         str_supported(tp_features.hotkey_mask));
 534
 535                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 536                 if (res)
 537                         return res;
 538         }
 539
 540         return (tp_features.hotkey)? 0 : 1;
 541 }
 542
 543 static void hotkey_exit(void)
 544 {
 545         int res;
 546
 547         if (tp_features.hotkey) {
 548                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 549                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 550                 if (res)
 551                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 552         }
 553 }
 554
 555 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 556 {
 557         int hkey;
 558
 559         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 560                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 561         else {
 562                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 563                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 564         }
 565 }
 566
 567 static int hotkey_get(int *status, int *mask)
 568 {
 569         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 570                 return -EIO;
 571
 572         if (tp_features.hotkey_mask)
 573                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 574                         return -EIO;
 575
 576         return 0;
 577 }
 578
 579 static int hotkey_set(int status, int mask)
 580 {
 581         int i;
 582
 583         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 584                 return -EIO;
 585
 586         if (tp_features.hotkey_mask)
 587                 for (i = 0; i < 32; i++) {
 588                         int bit = ((1 << i) & mask) != 0;
 589                         if (!acpi_evalf(hkey_handle,
 590                                         NULL, "MHKM", "vdd", i + 1, bit))
 591                                 return -EIO;
 592                 }
 593
 594         return 0;
 595 }
 596
 597 static int hotkey_read(char *p)
 598 {
 599         int res, status, mask;
 600         int len = 0;
 601
 602         if (!tp_features.hotkey) {
 603                 len += sprintf(p + len, "status:\t\tnot supported\n");
 604                 return len;
 605         }
 606
 607         res = hotkey_get(&status, &mask);
 608         if (res)
 609                 return res;
 610
 611         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 612         if (tp_features.hotkey_mask) {
 613                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 614                 len += sprintf(p + len,
 615                                "commands:\tenable, disable, reset, <mask>\n");
 616         } else {
 617                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 618                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 619         }
 620
 621         return len;
 622 }
 623
 624 static int hotkey_write(char *buf)
 625 {
 626         int res, status, mask;
 627         char *cmd;
 628         int do_cmd = 0;
 629
 630         if (!tp_features.hotkey)
 631                 return -ENODEV;
 632
 633         res = hotkey_get(&status, &mask);
 634         if (res)
 635                 return res;
 636
 637         while ((cmd = next_cmd(&buf))) {
 638                 if (strlencmp(cmd, "enable") == 0) {
 639                         status = 1;
 640                 } else if (strlencmp(cmd, "disable") == 0) {
 641                         status = 0;
 642                 } else if (strlencmp(cmd, "reset") == 0) {
 643                         status = hotkey_orig_status;
 644                         mask = hotkey_orig_mask;
 645                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 646                         /* mask set */
 647                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 648                         /* mask set */
 649                 } else
 650                         return -EINVAL;
 651                 do_cmd = 1;
 652         }
 653
 654         if (do_cmd) {
 655                 res = hotkey_set(status, mask);
 656                 if (res)
 657                         return res;
 658         }
 659
 660         return 0;
 661 }
 662
 663 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
 664         .hid = IBM_HKEY_HID,
 665         .notify = hotkey_notify,
 666         .handle = &hkey_handle,
 667         .type = ACPI_DEVICE_NOTIFY,
 668 };
 669
 670 static struct ibm_struct hotkey_driver_data = {
 671         .name = "hotkey",
 672         .read = hotkey_read,
 673         .write = hotkey_write,
 674         .exit = hotkey_exit,
 675         .acpi = &ibm_hotkey_acpidriver,
 676 };
 677
 678 /*************************************************************************
 679  * Bluetooth subdriver
 680  */
 681
 682 static int __init bluetooth_init(struct ibm_init_struct *iibm)
 683 {
 684         int status = 0;
 685
 686         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
 687
 688         IBM_ACPIHANDLE_INIT(hkey);
 689
 690         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 691            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 692         tp_features.bluetooth = hkey_handle &&
 693             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
 694
 695         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
 696                 str_supported(tp_features.bluetooth),
 697                 status);
 698
 699         if (tp_features.bluetooth &&
 700             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
 701                 /* no bluetooth hardware present in system */
 702                 tp_features.bluetooth = 0;
 703                 dbg_printk(TPACPI_DBG_INIT,
 704                            "bluetooth hardware not installed\n");
 705         }
 706
 707         return (tp_features.bluetooth)? 0 : 1;
 708 }
 709
 710 static int bluetooth_get_radiosw(void)
 711 {
 712         int status;
 713
 714         if (!tp_features.bluetooth)
 715                 return -ENODEV;
 716
 717         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 718                 return -EIO;
 719
 720         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
 721 }
 722
 723 static int bluetooth_set_radiosw(int radio_on)
 724 {
 725         int status;
 726
 727         if (!tp_features.bluetooth)
 728                 return -ENODEV;
 729
 730         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 731                 return -EIO;
 732         if (radio_on)
 733                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
 734         else
 735                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
 736         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 737                 return -EIO;
 738
 739         return 0;
 740 }
 741
 742 static int bluetooth_read(char *p)
 743 {
 744         int len = 0;
 745         int status = bluetooth_get_radiosw();
 746
 747         if (!tp_features.bluetooth)
 748                 len += sprintf(p + len, "status:\t\tnot supported\n");
 749         else {
 750                 len += sprintf(p + len, "status:\t\t%s\n",
 751                                 (status)? "enabled" : "disabled");
 752                 len += sprintf(p + len, "commands:\tenable, disable\n");
 753         }
 754
 755         return len;
 756 }
 757
 758 static int bluetooth_write(char *buf)
 759 {
 760         char *cmd;
 761
 762         if (!tp_features.bluetooth)
 763                 return -ENODEV;
 764
 765         while ((cmd = next_cmd(&buf))) {
 766                 if (strlencmp(cmd, "enable") == 0) {
 767                         bluetooth_set_radiosw(1);
 768                 } else if (strlencmp(cmd, "disable") == 0) {
 769                         bluetooth_set_radiosw(0);
 770                 } else
 771                         return -EINVAL;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static struct ibm_struct bluetooth_driver_data = {
 778         .name = "bluetooth",
 779         .read = bluetooth_read,
 780         .write = bluetooth_write,
 781 };
 782
 783 /*************************************************************************
 784  * Wan subdriver
 785  */
 786
 787 static int __init wan_init(struct ibm_init_struct *iibm)
 788 {
 789         int status = 0;
 790
 791         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
 792
 793         IBM_ACPIHANDLE_INIT(hkey);
 794
 795         tp_features.wan = hkey_handle &&
 796             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
 797
 798         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
 799                 str_supported(tp_features.wan),
 800                 status);
 801
 802         if (tp_features.wan &&
 803             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
 804                 /* no wan hardware present in system */
 805                 tp_features.wan = 0;
 806                 dbg_printk(TPACPI_DBG_INIT,
 807                            "wan hardware not installed\n");
 808         }
 809
 810         return (tp_features.wan)? 0 : 1;
 811 }
 812
 813 static int wan_get_radiosw(void)
 814 {
 815         int status;
 816
 817         if (!tp_features.wan)
 818                 return -ENODEV;
 819
 820         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 821                 return -EIO;
 822
 823         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
 824 }
 825
 826 static int wan_set_radiosw(int radio_on)
 827 {
 828         int status;
 829
 830         if (!tp_features.wan)
 831                 return -ENODEV;
 832
 833         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 834                 return -EIO;
 835         if (radio_on)
 836                 status |= TP_ACPI_WANCARD_RADIOSSW;
 837         else
 838                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
 839         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
 840                 return -EIO;
 841
 842         return 0;
 843 }
 844
 845 static int wan_read(char *p)
 846 {
 847         int len = 0;
 848         int status = wan_get_radiosw();
 849
 850         if (!tp_features.wan)
 851                 len += sprintf(p + len, "status:\t\tnot supported\n");
 852         else {
 853                 len += sprintf(p + len, "status:\t\t%s\n",
 854                                 (status)? "enabled" : "disabled");
 855                 len += sprintf(p + len, "commands:\tenable, disable\n");
 856         }
 857
 858         return len;
 859 }
 860
 861 static int wan_write(char *buf)
 862 {
 863         char *cmd;
 864
 865         if (!tp_features.wan)
 866                 return -ENODEV;
 867
 868         while ((cmd = next_cmd(&buf))) {
 869                 if (strlencmp(cmd, "enable") == 0) {
 870                         wan_set_radiosw(1);
 871                 } else if (strlencmp(cmd, "disable") == 0) {
 872                         wan_set_radiosw(0);
 873                 } else
 874                         return -EINVAL;
 875         }
 876
 877         return 0;
 878 }
 879
 880 static struct ibm_struct wan_driver_data = {
 881         .name = "wan",
 882         .read = wan_read,
 883         .write = wan_write,
 884         .flags.experimental = 1,
 885 };
 886
 887 /*************************************************************************
 888  * Video subdriver
 889  */
 890
 891 static enum video_access_mode video_supported;
 892 static int video_orig_autosw;
 893
 894 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 895            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 896            "\\_SB.PCI0.VID0",   /* 770e */
 897            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 898            "\\_SB.PCI0.AGP.VID",        /* all others */
 899            );                           /* R30, R31 */
 900
 901 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 902
 903 static int __init video_init(struct ibm_init_struct *iibm)
 904 {
 905         int ivga;
 906
 907         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
 908
 909         IBM_ACPIHANDLE_INIT(vid);
 910         IBM_ACPIHANDLE_INIT(vid2);
 911
 912         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 913                 /* G41, assume IVGA doesn't change */
 914                 vid_handle = vid2_handle;
 915
 916         if (!vid_handle)
 917                 /* video switching not supported on R30, R31 */
 918                 video_supported = TPACPI_VIDEO_NONE;
 919         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 920                 /* 570 */
 921                 video_supported = TPACPI_VIDEO_570;
 922         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 923                 /* 600e/x, 770e, 770x */
 924                 video_supported = TPACPI_VIDEO_770;
 925         else
 926                 /* all others */
 927                 video_supported = TPACPI_VIDEO_NEW;
 928
 929         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
 930                 str_supported(video_supported != TPACPI_VIDEO_NONE),
 931                 video_supported);
 932
 933         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
 934 }
 935
 936 static void video_exit(void)
 937 {
 938         dbg_printk(TPACPI_DBG_EXIT, "restoring original video autoswitch mode\n");
 939         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
 940 }
 941
 942 static int video_status(void)
 943 {
 944         int status = 0;
 945         int i;
 946
 947         if (video_supported == TPACPI_VIDEO_570) {
 948                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
 949                         status = i & 3;
 950         } else if (video_supported == TPACPI_VIDEO_770) {
 951                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 952                         status |= 0x01 * i;
 953                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 954                         status |= 0x02 * i;
 955         } else if (video_supported == TPACPI_VIDEO_NEW) {
 956                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
 957                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 958                         status |= 0x02 * i;
 959
 960                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
 961                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 962                         status |= 0x01 * i;
 963                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
 964                         status |= 0x08 * i;
 965         }
 966
 967         return status;
 968 }
 969
 970 static int video_autosw(void)
 971 {
 972         int autosw = 0;
 973
 974         if (video_supported == TPACPI_VIDEO_570)
 975                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
 976         else if (video_supported == TPACPI_VIDEO_770 ||
 977                  video_supported == TPACPI_VIDEO_NEW)
 978                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
 979
 980         return autosw & 1;
 981 }
 982
 983 static int video_switch(void)
 984 {
 985         int autosw = video_autosw();
 986         int ret;
 987
 988         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 989                 return -EIO;
 990         ret = video_supported == TPACPI_VIDEO_570 ?
 991             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
 992             acpi_evalf(vid_handle, NULL, "VSWT", "v");
 993         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 994
 995         return ret;
 996 }
 997
 998 static int video_expand(void)
 999 {
1000         if (video_supported == TPACPI_VIDEO_570)
1001                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
1002         else if (video_supported == TPACPI_VIDEO_770)
1003                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
1004         else
1005                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
1006 }
1007
1008 static int video_switch2(int status)
1009 {
1010         int ret;
1011
1012         if (video_supported == TPACPI_VIDEO_570) {
1013                 ret = acpi_evalf(NULL, NULL,
1014                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
1015         } else if (video_supported == TPACPI_VIDEO_770) {
1016                 int autosw = video_autosw();
1017                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
1018                         return -EIO;
1019
1020                 ret = acpi_evalf(vid_handle, NULL,
1021                                  "ASWT", "vdd", status * 0x100, 0);
1022
1023                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
1024         } else {
1025                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1026                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1027         }
1028
1029         return ret;
1030 }
1031
1032 static int video_read(char *p)
1033 {
1034         int status = video_status();
1035         int autosw = video_autosw();
1036         int len = 0;
1037
1038         if (!video_supported) {
1039                 len += sprintf(p + len, "status:\t\tnot supported\n");
1040                 return len;
1041         }
1042
1043         len += sprintf(p + len, "status:\t\tsupported\n");
1044         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1045         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1046         if (video_supported == TPACPI_VIDEO_NEW)
1047                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1048         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1049         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1050         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1051         if (video_supported == TPACPI_VIDEO_NEW)
1052                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1053         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1054         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1055
1056         return len;
1057 }
1058
1059 static int video_write(char *buf)
1060 {
1061         char *cmd;
1062         int enable, disable, status;
1063
1064         if (!video_supported)
1065                 return -ENODEV;
1066
1067         enable = disable = 0;
1068
1069         while ((cmd = next_cmd(&buf))) {
1070                 if (strlencmp(cmd, "lcd_enable") == 0) {
1071                         enable |= 0x01;
1072                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1073                         disable |= 0x01;
1074                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1075                         enable |= 0x02;
1076                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1077                         disable |= 0x02;
1078                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1079                            strlencmp(cmd, "dvi_enable") == 0) {
1080                         enable |= 0x08;
1081                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1082                            strlencmp(cmd, "dvi_disable") == 0) {
1083                         disable |= 0x08;
1084                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1085                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
1086                                 return -EIO;
1087                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1088                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
1089                                 return -EIO;
1090                 } else if (strlencmp(cmd, "video_switch") == 0) {
1091                         if (!video_switch())
1092                                 return -EIO;
1093                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1094                         if (!video_expand())
1095                                 return -EIO;
1096                 } else
1097                         return -EINVAL;
1098         }
1099
1100         if (enable || disable) {
1101                 status = (video_status() & 0x0f & ~disable) | enable;
1102                 if (!video_switch2(status))
1103                         return -EIO;
1104         }
1105
1106         return 0;
1107 }
1108
1109 static struct ibm_struct video_driver_data = {
1110         .name = "video",
1111         .read = video_read,
1112         .write = video_write,
1113         .exit = video_exit,
1114 };
1115
1116 /*************************************************************************
1117  * Light (thinklight) subdriver
1118  */
1119
1120 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1121 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1122
1123 static int __init light_init(struct ibm_init_struct *iibm)
1124 {
1125         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1126
1127         IBM_ACPIHANDLE_INIT(ledb);
1128         IBM_ACPIHANDLE_INIT(lght);
1129         IBM_ACPIHANDLE_INIT(cmos);
1130
1131         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1132         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1133
1134         if (tp_features.light)
1135                 /* light status not supported on
1136                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1137                 tp_features.light_status =
1138                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1139
1140         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1141                 str_supported(tp_features.light));
1142
1143         return (tp_features.light)? 0 : 1;
1144 }
1145
1146 static int light_read(char *p)
1147 {
1148         int len = 0;
1149         int status = 0;
1150
1151         if (!tp_features.light) {
1152                 len += sprintf(p + len, "status:\t\tnot supported\n");
1153         } else if (!tp_features.light_status) {
1154                 len += sprintf(p + len, "status:\t\tunknown\n");
1155                 len += sprintf(p + len, "commands:\ton, off\n");
1156         } else {
1157                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1158                         return -EIO;
1159                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1160                 len += sprintf(p + len, "commands:\ton, off\n");
1161         }
1162
1163         return len;
1164 }
1165
1166 static int light_write(char *buf)
1167 {
1168         int cmos_cmd, lght_cmd;
1169         char *cmd;
1170         int success;
1171
1172         if (!tp_features.light)
1173                 return -ENODEV;
1174
1175         while ((cmd = next_cmd(&buf))) {
1176                 if (strlencmp(cmd, "on") == 0) {
1177                         cmos_cmd = 0x0c;
1178                         lght_cmd = 1;
1179                 } else if (strlencmp(cmd, "off") == 0) {
1180                         cmos_cmd = 0x0d;
1181                         lght_cmd = 0;
1182                 } else
1183                         return -EINVAL;
1184
1185                 success = cmos_handle ?
1186                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1187                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1188                 if (!success)
1189                         return -EIO;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static struct ibm_struct light_driver_data = {
1196         .name = "light",
1197         .read = light_read,
1198         .write = light_write,
1199 };
1200
1201 /*************************************************************************
1202  * Dock subdriver
1203  */
1204
1205 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1206
1207 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1208            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1209            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1210            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1211     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1212
1213 /* don't list other alternatives as we install a notify handler on the 570 */
1214 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1215
1216 #define dock_docked() (_sta(dock_handle) & 1)
1217
1218 static int __init dock_init(struct ibm_init_struct *iibm)
1219 {
1220         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1221
1222         IBM_ACPIHANDLE_INIT(dock);
1223         IBM_ACPIHANDLE_INIT(pci);
1224
1225         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1226                 str_supported(dock_handle != NULL));
1227
1228         return (dock_handle)? 0 : 1;
1229 }
1230
1231 static void dock_notify(struct ibm_struct *ibm, u32 event)
1232 {
1233         int docked = dock_docked();
1234         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1235
1236         if (event == 1 && !pci) /* 570 */
1237                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1238         else if (event == 1 && pci)     /* 570 */
1239                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1240         else if (event == 3 && docked)
1241                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1242         else if (event == 3 && !docked)
1243                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1244         else if (event == 0 && docked)
1245                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1246         else {
1247                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1248                        event, _sta(dock_handle));
1249                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1250         }
1251 }
1252
1253 static int dock_read(char *p)
1254 {
1255         int len = 0;
1256         int docked = dock_docked();
1257
1258         if (!dock_handle)
1259                 len += sprintf(p + len, "status:\t\tnot supported\n");
1260         else if (!docked)
1261                 len += sprintf(p + len, "status:\t\tundocked\n");
1262         else {
1263                 len += sprintf(p + len, "status:\t\tdocked\n");
1264                 len += sprintf(p + len, "commands:\tdock, undock\n");
1265         }
1266
1267         return len;
1268 }
1269
1270 static int dock_write(char *buf)
1271 {
1272         char *cmd;
1273
1274         if (!dock_docked())
1275                 return -ENODEV;
1276
1277         while ((cmd = next_cmd(&buf))) {
1278                 if (strlencmp(cmd, "undock") == 0) {
1279                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1280                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1281                                 return -EIO;
1282                 } else if (strlencmp(cmd, "dock") == 0) {
1283                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1284                                 return -EIO;
1285                 } else
1286                         return -EINVAL;
1287         }
1288
1289         return 0;
1290 }
1291
1292 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1293         {
1294          .notify = dock_notify,
1295          .handle = &dock_handle,
1296          .type = ACPI_SYSTEM_NOTIFY,
1297         },
1298         {
1299          .hid = IBM_PCI_HID,
1300          .notify = dock_notify,
1301          .handle = &pci_handle,
1302          .type = ACPI_SYSTEM_NOTIFY,
1303         },
1304 };
1305
1306 static struct ibm_struct dock_driver_data[2] = {
1307         {
1308          .name = "dock",
1309          .read = dock_read,
1310          .write = dock_write,
1311          .acpi = &ibm_dock_acpidriver[0],
1312         },
1313         {
1314          .name = "dock",
1315          .acpi = &ibm_dock_acpidriver[1],
1316         },
1317 };
1318
1319 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1320
1321 /*************************************************************************
1322  * Bay subdriver
1323  */
1324
1325 #ifdef CONFIG_THINKPAD_ACPI_BAY
1326 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1327            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1328            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1329            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1330            );                           /* A21e, R30, R31 */
1331 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1332            "_EJ0",              /* all others */
1333            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1334 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
1335            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1336            );                           /* all others */
1337 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
1338            "_EJ0",                      /* 770x */
1339            );                           /* all others */
1340
1341 static int __init bay_init(struct ibm_init_struct *iibm)
1342 {
1343         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1344
1345         IBM_ACPIHANDLE_INIT(bay);
1346         if (bay_handle)
1347                 IBM_ACPIHANDLE_INIT(bay_ej);
1348         IBM_ACPIHANDLE_INIT(bay2);
1349         if (bay2_handle)
1350                 IBM_ACPIHANDLE_INIT(bay2_ej);
1351
1352         tp_features.bay_status = bay_handle &&
1353                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1354         tp_features.bay_status2 = bay2_handle &&
1355                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1356
1357         tp_features.bay_eject = bay_handle && bay_ej_handle &&
1358                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1359         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1360                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1361
1362         vdbg_printk(TPACPI_DBG_INIT,
1363                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1364                 str_supported(tp_features.bay_status),
1365                 str_supported(tp_features.bay_eject),
1366                 str_supported(tp_features.bay_status2),
1367                 str_supported(tp_features.bay_eject2));
1368
1369         return (tp_features.bay_status || tp_features.bay_eject ||
1370                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1371 }
1372
1373 static void bay_notify(struct ibm_struct *ibm, u32 event)
1374 {
1375         acpi_bus_generate_event(ibm->acpi->device, event, 0);
1376 }
1377
1378 #define bay_occupied(b) (_sta(b##_handle) & 1)
1379
1380 static int bay_read(char *p)
1381 {
1382         int len = 0;
1383         int occupied = bay_occupied(bay);
1384         int occupied2 = bay_occupied(bay2);
1385         int eject, eject2;
1386
1387         len += sprintf(p + len, "status:\t\t%s\n",
1388                 tp_features.bay_status ?
1389                         (occupied ? "occupied" : "unoccupied") :
1390                                 "not supported");
1391         if (tp_features.bay_status2)
1392                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1393                                "occupied" : "unoccupied");
1394
1395         eject = tp_features.bay_eject && occupied;
1396         eject2 = tp_features.bay_eject2 && occupied2;
1397
1398         if (eject && eject2)
1399                 len += sprintf(p + len, "commands:\teject, eject2\n");
1400         else if (eject)
1401                 len += sprintf(p + len, "commands:\teject\n");
1402         else if (eject2)
1403                 len += sprintf(p + len, "commands:\teject2\n");
1404
1405         return len;
1406 }
1407
1408 static int bay_write(char *buf)
1409 {
1410         char *cmd;
1411
1412         if (!tp_features.bay_eject && !tp_features.bay_eject2)
1413                 return -ENODEV;
1414
1415         while ((cmd = next_cmd(&buf))) {
1416                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1417                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1418                                 return -EIO;
1419                 } else if (tp_features.bay_eject2 &&
1420                            strlencmp(cmd, "eject2") == 0) {
1421                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1422                                 return -EIO;
1423                 } else
1424                         return -EINVAL;
1425         }
1426
1427         return 0;
1428 }
1429
1430 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1431         .notify = bay_notify,
1432         .handle = &bay_handle,
1433         .type = ACPI_SYSTEM_NOTIFY,
1434 };
1435
1436 static struct ibm_struct bay_driver_data = {
1437         .name = "bay",
1438         .read = bay_read,
1439         .write = bay_write,
1440         .acpi = &ibm_bay_acpidriver,
1441 };
1442
1443 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1444
1445 /*************************************************************************
1446  * CMOS subdriver
1447  */
1448
1449 static int __init cmos_init(struct ibm_init_struct *iibm)
1450 {
1451         vdbg_printk(TPACPI_DBG_INIT,
1452                 "initializing cmos commands subdriver\n");
1453
1454         IBM_ACPIHANDLE_INIT(cmos);
1455
1456         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1457                 str_supported(cmos_handle != NULL));
1458         return (cmos_handle)? 0 : 1;
1459 }
1460
1461 static int cmos_eval(int cmos_cmd)
1462 {
1463         if (cmos_handle)
1464                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1465         else
1466                 return 1;
1467 }
1468
1469 static int cmos_read(char *p)
1470 {
1471         int len = 0;
1472
1473         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1474            R30, R31, T20-22, X20-21 */
1475         if (!cmos_handle)
1476                 len += sprintf(p + len, "status:\t\tnot supported\n");
1477         else {
1478                 len += sprintf(p + len, "status:\t\tsupported\n");
1479                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1480         }
1481
1482         return len;
1483 }
1484
1485 static int cmos_write(char *buf)
1486 {
1487         char *cmd;
1488         int cmos_cmd;
1489
1490         if (!cmos_handle)
1491                 return -EINVAL;
1492
1493         while ((cmd = next_cmd(&buf))) {
1494                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1495                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1496                         /* cmos_cmd set */
1497                 } else
1498                         return -EINVAL;
1499
1500                 if (!cmos_eval(cmos_cmd))
1501                         return -EIO;
1502         }
1503
1504         return 0;
1505 }
1506
1507 static struct ibm_struct cmos_driver_data = {
1508         .name = "cmos",
1509         .read = cmos_read,
1510         .write = cmos_write,
1511 };
1512
1513 /*************************************************************************
1514  * LED subdriver
1515  */
1516
1517 static enum led_access_mode led_supported;
1518
1519 IBM_HANDLE(led, ec, "SLED",     /* 570 */
1520            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1521            "LED",               /* all others */
1522            );                   /* R30, R31 */
1523
1524 static int __init led_init(struct ibm_init_struct *iibm)
1525 {
1526         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1527
1528         IBM_ACPIHANDLE_INIT(led);
1529
1530         if (!led_handle)
1531                 /* led not supported on R30, R31 */
1532                 led_supported = TPACPI_LED_NONE;
1533         else if (strlencmp(led_path, "SLED") == 0)
1534                 /* 570 */
1535                 led_supported = TPACPI_LED_570;
1536         else if (strlencmp(led_path, "SYSL") == 0)
1537                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1538                 led_supported = TPACPI_LED_OLD;
1539         else
1540                 /* all others */
1541                 led_supported = TPACPI_LED_NEW;
1542
1543         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1544                 str_supported(led_supported), led_supported);
1545
1546         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1547 }
1548
1549 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1550
1551 static int led_read(char *p)
1552 {
1553         int len = 0;
1554
1555         if (!led_supported) {
1556                 len += sprintf(p + len, "status:\t\tnot supported\n");
1557                 return len;
1558         }
1559         len += sprintf(p + len, "status:\t\tsupported\n");
1560
1561         if (led_supported == TPACPI_LED_570) {
1562                 /* 570 */
1563                 int i, status;
1564                 for (i = 0; i < 8; i++) {
1565                         if (!acpi_evalf(ec_handle,
1566                                         &status, "GLED", "dd", 1 << i))
1567                                 return -EIO;
1568                         len += sprintf(p + len, "%d:\t\t%s\n",
1569                                        i, led_status(status));
1570                 }
1571         }
1572
1573         len += sprintf(p + len, "commands:\t"
1574                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1575
1576         return len;
1577 }
1578
1579 /* off, on, blink */
1580 static const int led_sled_arg1[] = { 0, 1, 3 };
1581 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1582 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1583 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1584
1585 static int led_write(char *buf)
1586 {
1587         char *cmd;
1588         int led, ind, ret;
1589
1590         if (!led_supported)
1591                 return -ENODEV;
1592
1593         while ((cmd = next_cmd(&buf))) {
1594                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1595                         return -EINVAL;
1596
1597                 if (strstr(cmd, "off")) {
1598                         ind = 0;
1599                 } else if (strstr(cmd, "on")) {
1600                         ind = 1;
1601                 } else if (strstr(cmd, "blink")) {
1602                         ind = 2;
1603                 } else
1604                         return -EINVAL;
1605
1606                 if (led_supported == TPACPI_LED_570) {
1607                         /* 570 */
1608                         led = 1 << led;
1609                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1610                                         led, led_sled_arg1[ind]))
1611                                 return -EIO;
1612                 } else if (led_supported == TPACPI_LED_OLD) {
1613                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1614                         led = 1 << led;
1615                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
1616                         if (ret >= 0)
1617                                 ret =
1618                                     ec_write(TPACPI_LED_EC_HLBL,
1619                                              led * led_exp_hlbl[ind]);
1620                         if (ret >= 0)
1621                                 ret =
1622                                     ec_write(TPACPI_LED_EC_HLCL,
1623                                              led * led_exp_hlcl[ind]);
1624                         if (ret < 0)
1625                                 return ret;
1626                 } else {
1627                         /* all others */
1628                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1629                                         led, led_led_arg1[ind]))
1630                                 return -EIO;
1631                 }
1632         }
1633
1634         return 0;
1635 }
1636
1637 static struct ibm_struct led_driver_data = {
1638         .name = "led",
1639         .read = led_read,
1640         .write = led_write,
1641 };
1642
1643 /*************************************************************************
1644  * Beep subdriver
1645  */
1646
1647 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
1648
1649 static int __init beep_init(struct ibm_init_struct *iibm)
1650 {
1651         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1652
1653         IBM_ACPIHANDLE_INIT(beep);
1654
1655         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1656                 str_supported(beep_handle != NULL));
1657
1658         return (beep_handle)? 0 : 1;
1659 }
1660
1661 static int beep_read(char *p)
1662 {
1663         int len = 0;
1664
1665         if (!beep_handle)
1666                 len += sprintf(p + len, "status:\t\tnot supported\n");
1667         else {
1668                 len += sprintf(p + len, "status:\t\tsupported\n");
1669                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1670         }
1671
1672         return len;
1673 }
1674
1675 static int beep_write(char *buf)
1676 {
1677         char *cmd;
1678         int beep_cmd;
1679
1680         if (!beep_handle)
1681                 return -ENODEV;
1682
1683         while ((cmd = next_cmd(&buf))) {
1684                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1685                     beep_cmd >= 0 && beep_cmd <= 17) {
1686                         /* beep_cmd set */
1687                 } else
1688                         return -EINVAL;
1689                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1690                         return -EIO;
1691         }
1692
1693         return 0;
1694 }
1695
1696 static struct ibm_struct beep_driver_data = {
1697         .name = "beep",
1698         .read = beep_read,
1699         .write = beep_write,
1700 };
1701
1702 /*************************************************************************
1703  * Thermal subdriver
1704  */
1705
1706 static enum thermal_access_mode thermal_read_mode;
1707
1708 static int __init thermal_init(struct ibm_init_struct *iibm)
1709 {
1710         u8 t, ta1, ta2;
1711         int i;
1712         int acpi_tmp7;
1713
1714         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1715
1716         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1717
1718         if (ibm_thinkpad_ec_found && experimental) {
1719                 /*
1720                  * Direct EC access mode: sensors at registers
1721                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
1722                  * non-implemented, thermal sensors return 0x80 when
1723                  * not available
1724                  */
1725
1726                 ta1 = ta2 = 0;
1727                 for (i = 0; i < 8; i++) {
1728                         if (likely(acpi_ec_read(0x78 + i, &t))) {
1729                                 ta1 |= t;
1730                         } else {
1731                                 ta1 = 0;
1732                                 break;
1733                         }
1734                         if (likely(acpi_ec_read(0xC0 + i, &t))) {
1735                                 ta2 |= t;
1736                         } else {
1737                                 ta1 = 0;
1738                                 break;
1739                         }
1740                 }
1741                 if (ta1 == 0) {
1742                         /* This is sheer paranoia, but we handle it anyway */
1743                         if (acpi_tmp7) {
1744                                 printk(IBM_ERR
1745                                        "ThinkPad ACPI EC access misbehaving, "
1746                                        "falling back to ACPI TMPx access mode\n");
1747                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1748                         } else {
1749                                 printk(IBM_ERR
1750                                        "ThinkPad ACPI EC access misbehaving, "
1751                                        "disabling thermal sensors access\n");
1752                                 thermal_read_mode = TPACPI_THERMAL_NONE;
1753                         }
1754                 } else {
1755                         thermal_read_mode =
1756                             (ta2 != 0) ?
1757                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1758                 }
1759         } else if (acpi_tmp7) {
1760                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1761                         /* 600e/x, 770e, 770x */
1762                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1763                 } else {
1764                         /* Standard ACPI TMPx access, max 8 sensors */
1765                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1766                 }
1767         } else {
1768                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1769                 thermal_read_mode = TPACPI_THERMAL_NONE;
1770         }
1771
1772         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1773                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1774                 thermal_read_mode);
1775
1776         return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1777 }
1778
1779 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1780 {
1781         int i, t;
1782         s8 tmp;
1783         char tmpi[] = "TMPi";
1784
1785         if (!s)
1786                 return -EINVAL;
1787
1788         switch (thermal_read_mode) {
1789 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1790         case TPACPI_THERMAL_TPEC_16:
1791                 for (i = 0; i < 8; i++) {
1792                         if (!acpi_ec_read(0xC0 + i, &tmp))
1793                                 return -EIO;
1794                         s->temp[i + 8] = tmp * 1000;
1795                 }
1796                 /* fallthrough */
1797 #endif
1798         case TPACPI_THERMAL_TPEC_8:
1799                 for (i = 0; i < 8; i++) {
1800                         if (!acpi_ec_read(0x78 + i, &tmp))
1801                                 return -EIO;
1802                         s->temp[i] = tmp * 1000;
1803                 }
1804                 return (thermal_read_mode == TPACPI_THERMAL_TPEC_16) ? 16 : 8;
1805
1806         case TPACPI_THERMAL_ACPI_UPDT:
1807                 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1808                         return -EIO;
1809                 for (i = 0; i < 8; i++) {
1810                         tmpi[3] = '0' + i;
1811                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1812                                 return -EIO;
1813                         s->temp[i] = (t - 2732) * 100;
1814                 }
1815                 return 8;
1816
1817         case TPACPI_THERMAL_ACPI_TMP07:
1818                 for (i = 0; i < 8; i++) {
1819                         tmpi[3] = '0' + i;
1820                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1821                                 return -EIO;
1822                         s->temp[i] = t * 1000;
1823                 }
1824                 return 8;
1825
1826         case TPACPI_THERMAL_NONE:
1827         default:
1828                 return 0;
1829         }
1830 }
1831
1832 static int thermal_read(char *p)
1833 {
1834         int len = 0;
1835         int n, i;
1836         struct ibm_thermal_sensors_struct t;
1837
1838         n = thermal_get_sensors(&t);
1839         if (unlikely(n < 0))
1840                 return n;
1841
1842         len += sprintf(p + len, "temperatures:\t");
1843
1844         if (n > 0) {
1845                 for (i = 0; i < (n - 1); i++)
1846                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1847                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1848         } else
1849                 len += sprintf(p + len, "not supported\n");
1850
1851         return len;
1852 }
1853
1854 static struct ibm_struct thermal_driver_data = {
1855         .name = "thermal",
1856         .read = thermal_read,
1857 };
1858
1859 /*************************************************************************
1860  * EC Dump subdriver
1861  */
1862
1863 static u8 ecdump_regs[256];
1864
1865 static int ecdump_read(char *p)
1866 {
1867         int len = 0;
1868         int i, j;
1869         u8 v;
1870
1871         len += sprintf(p + len, "EC      "
1872                        " +00 +01 +02 +03 +04 +05 +06 +07"
1873                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1874         for (i = 0; i < 256; i += 16) {
1875                 len += sprintf(p + len, "EC 0x%02x:", i);
1876                 for (j = 0; j < 16; j++) {
1877                         if (!acpi_ec_read(i + j, &v))
1878                                 break;
1879                         if (v != ecdump_regs[i + j])
1880                                 len += sprintf(p + len, " *%02x", v);
1881                         else
1882                                 len += sprintf(p + len, "  %02x", v);
1883                         ecdump_regs[i + j] = v;
1884                 }
1885                 len += sprintf(p + len, "\n");
1886                 if (j != 16)
1887                         break;
1888         }
1889
1890         /* These are way too dangerous to advertise openly... */
1891 #if 0
1892         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1893                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1894         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1895                        " (<offset> is 00-ff, <value> is 0-255)\n");
1896 #endif
1897         return len;
1898 }
1899
1900 static int ecdump_write(char *buf)
1901 {
1902         char *cmd;
1903         int i, v;
1904
1905         while ((cmd = next_cmd(&buf))) {
1906                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1907                         /* i and v set */
1908                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1909                         /* i and v set */
1910                 } else
1911                         return -EINVAL;
1912                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1913                         if (!acpi_ec_write(i, v))
1914                                 return -EIO;
1915                 } else
1916                         return -EINVAL;
1917         }
1918
1919         return 0;
1920 }
1921
1922 static struct ibm_struct ecdump_driver_data = {
1923         .name = "ecdump",
1924         .read = ecdump_read,
1925         .write = ecdump_write,
1926         .flags.experimental = 1,
1927 };
1928
1929 /*************************************************************************
1930  * Backlight/brightness subdriver
1931  */
1932
1933 static struct backlight_device *ibm_backlight_device = NULL;
1934
1935 static struct backlight_ops ibm_backlight_data = {
1936         .get_brightness = brightness_get,
1937         .update_status  = brightness_update_status,
1938 };
1939
1940 static int __init brightness_init(struct ibm_init_struct *iibm)
1941 {
1942         int b;
1943
1944         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
1945
1946         b = brightness_get(NULL);
1947         if (b < 0)
1948                 return b;
1949
1950         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
1951                                                          &ibm_backlight_data);
1952         if (IS_ERR(ibm_backlight_device)) {
1953                 printk(IBM_ERR "Could not register backlight device\n");
1954                 return PTR_ERR(ibm_backlight_device);
1955         }
1956         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
1957
1958         ibm_backlight_device->props.max_brightness = 7;
1959         ibm_backlight_device->props.brightness = b;
1960         backlight_update_status(ibm_backlight_device);
1961
1962         return 0;
1963 }
1964
1965 static void brightness_exit(void)
1966 {
1967         if (ibm_backlight_device) {
1968                 vdbg_printk(TPACPI_DBG_EXIT,
1969                             "calling backlight_device_unregister()\n");
1970                 backlight_device_unregister(ibm_backlight_device);
1971                 ibm_backlight_device = NULL;
1972         }
1973 }
1974
1975 static int brightness_update_status(struct backlight_device *bd)
1976 {
1977         return brightness_set(
1978                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
1979                  bd->props.power == FB_BLANK_UNBLANK) ?
1980                                 bd->props.brightness : 0);
1981 }
1982
1983 static int brightness_get(struct backlight_device *bd)
1984 {
1985         u8 level;
1986         if (!acpi_ec_read(brightness_offset, &level))
1987                 return -EIO;
1988
1989         level &= 0x7;
1990
1991         return level;
1992 }
1993
1994 static int brightness_set(int value)
1995 {
1996         int cmos_cmd, inc, i;
1997         int current_value = brightness_get(NULL);
1998
1999         value &= 7;
2000
2001         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2002         inc = value > current_value ? 1 : -1;
2003         for (i = current_value; i != value; i += inc) {
2004                 if (!cmos_eval(cmos_cmd))
2005                         return -EIO;
2006                 if (!acpi_ec_write(brightness_offset, i + inc))
2007                         return -EIO;
2008         }
2009
2010         return 0;
2011 }
2012
2013 static int brightness_read(char *p)
2014 {
2015         int len = 0;
2016         int level;
2017
2018         if ((level = brightness_get(NULL)) < 0) {
2019                 len += sprintf(p + len, "level:\t\tunreadable\n");
2020         } else {
2021                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2022                 len += sprintf(p + len, "commands:\tup, down\n");
2023                 len += sprintf(p + len, "commands:\tlevel <level>"
2024                                " (<level> is 0-7)\n");
2025         }
2026
2027         return len;
2028 }
2029
2030 static int brightness_write(char *buf)
2031 {
2032         int level;
2033         int new_level;
2034         char *cmd;
2035
2036         while ((cmd = next_cmd(&buf))) {
2037                 if ((level = brightness_get(NULL)) < 0)
2038                         return level;
2039                 level &= 7;
2040
2041                 if (strlencmp(cmd, "up") == 0) {
2042                         new_level = level == 7 ? 7 : level + 1;
2043                 } else if (strlencmp(cmd, "down") == 0) {
2044                         new_level = level == 0 ? 0 : level - 1;
2045                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2046                            new_level >= 0 && new_level <= 7) {
2047                         /* new_level set */
2048                 } else
2049                         return -EINVAL;
2050
2051                 brightness_set(new_level);
2052         }
2053
2054         return 0;
2055 }
2056
2057 static struct ibm_struct brightness_driver_data = {
2058         .name = "brightness",
2059         .read = brightness_read,
2060         .write = brightness_write,
2061         .exit = brightness_exit,
2062 };
2063
2064 /*************************************************************************
2065  * Volume subdriver
2066  */
2067
2068 static int volume_read(char *p)
2069 {
2070         int len = 0;
2071         u8 level;
2072
2073         if (!acpi_ec_read(volume_offset, &level)) {
2074                 len += sprintf(p + len, "level:\t\tunreadable\n");
2075         } else {
2076                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2077                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2078                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2079                 len += sprintf(p + len, "commands:\tlevel <level>"
2080                                " (<level> is 0-15)\n");
2081         }
2082
2083         return len;
2084 }
2085
2086 static int volume_write(char *buf)
2087 {
2088         int cmos_cmd, inc, i;
2089         u8 level, mute;
2090         int new_level, new_mute;
2091         char *cmd;
2092
2093         while ((cmd = next_cmd(&buf))) {
2094                 if (!acpi_ec_read(volume_offset, &level))
2095                         return -EIO;
2096                 new_mute = mute = level & 0x40;
2097                 new_level = level = level & 0xf;
2098
2099                 if (strlencmp(cmd, "up") == 0) {
2100                         if (mute)
2101                                 new_mute = 0;
2102                         else
2103                                 new_level = level == 15 ? 15 : level + 1;
2104                 } else if (strlencmp(cmd, "down") == 0) {
2105                         if (mute)
2106                                 new_mute = 0;
2107                         else
2108                                 new_level = level == 0 ? 0 : level - 1;
2109                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2110                            new_level >= 0 && new_level <= 15) {
2111                         /* new_level set */
2112                 } else if (strlencmp(cmd, "mute") == 0) {
2113                         new_mute = 0x40;
2114                 } else
2115                         return -EINVAL;
2116
2117                 if (new_level != level) {       /* mute doesn't change */
2118                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2119                         inc = new_level > level ? 1 : -1;
2120
2121                         if (mute && (!cmos_eval(cmos_cmd) ||
2122                                      !acpi_ec_write(volume_offset, level)))
2123                                 return -EIO;
2124
2125                         for (i = level; i != new_level; i += inc)
2126                                 if (!cmos_eval(cmos_cmd) ||
2127                                     !acpi_ec_write(volume_offset, i + inc))
2128                                         return -EIO;
2129
2130                         if (mute && (!cmos_eval(TP_CMOS_VOLUME_MUTE) ||
2131                                      !acpi_ec_write(volume_offset,
2132                                                     new_level + mute)))
2133                                 return -EIO;
2134                 }
2135
2136                 if (new_mute != mute) { /* level doesn't change */
2137                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2138
2139                         if (!cmos_eval(cmos_cmd) ||
2140                             !acpi_ec_write(volume_offset, level + new_mute))
2141                                 return -EIO;
2142                 }
2143         }
2144
2145         return 0;
2146 }
2147
2148 static struct ibm_struct volume_driver_data = {
2149         .name = "volume",
2150         .read = volume_read,
2151         .write = volume_write,
2152 };
2153
2154 /*************************************************************************
2155  * Fan subdriver
2156  */
2157
2158 /*
2159  * FAN ACCESS MODES
2160  *
2161  * TPACPI_FAN_RD_ACPI_GFAN:
2162  *      ACPI GFAN method: returns fan level
2163  *
2164  *      see TPACPI_FAN_WR_ACPI_SFAN
2165  *      EC 0x2f (HFSP) not available if GFAN exists
2166  *
2167  * TPACPI_FAN_WR_ACPI_SFAN:
2168  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2169  *
2170  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
2171  *      it for writing.
2172  *
2173  * TPACPI_FAN_WR_TPEC:
2174  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
2175  *      Supported on almost all ThinkPads
2176  *
2177  *      Fan speed changes of any sort (including those caused by the
2178  *      disengaged mode) are usually done slowly by the firmware as the
2179  *      maximum ammount of fan duty cycle change per second seems to be
2180  *      limited.
2181  *
2182  *      Reading is not available if GFAN exists.
2183  *      Writing is not available if SFAN exists.
2184  *
2185  *      Bits
2186  *       7      automatic mode engaged;
2187  *              (default operation mode of the ThinkPad)
2188  *              fan level is ignored in this mode.
2189  *       6      full speed mode (takes precedence over bit 7);
2190  *              not available on all thinkpads.  May disable
2191  *              the tachometer while the fan controller ramps up
2192  *              the speed (which can take up to a few *minutes*).
2193  *              Speeds up fan to 100% duty-cycle, which is far above
2194  *              the standard RPM levels.  It is not impossible that
2195  *              it could cause hardware damage.
2196  *      5-3     unused in some models.  Extra bits for fan level
2197  *              in others, but still useless as all values above
2198  *              7 map to the same speed as level 7 in these models.
2199  *      2-0     fan level (0..7 usually)
2200  *                      0x00 = stop
2201  *                      0x07 = max (set when temperatures critical)
2202  *              Some ThinkPads may have other levels, see
2203  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2204  *
2205  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2206  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2207  *      does so, its initial value is meaningless (0x07).
2208  *
2209  *      For firmware bugs, refer to:
2210  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2211  *
2212  *      ----
2213  *
2214  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2215  *      Main fan tachometer reading (in RPM)
2216  *
2217  *      This register is present on all ThinkPads with a new-style EC, and
2218  *      it is known not to be present on the A21m/e, and T22, as there is
2219  *      something else in offset 0x84 according to the ACPI DSDT.  Other
2220  *      ThinkPads from this same time period (and earlier) probably lack the
2221  *      tachometer as well.
2222  *
2223  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2224  *      was never fixed by IBM to report the EC firmware version string
2225  *      probably support the tachometer (like the early X models), so
2226  *      detecting it is quite hard.  We need more data to know for sure.
2227  *
2228  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2229  *      might result.
2230  *
2231  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
2232  *      mode.
2233  *
2234  *      For firmware bugs, refer to:
2235  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2236  *
2237  * TPACPI_FAN_WR_ACPI_FANS:
2238  *      ThinkPad X31, X40, X41.  Not available in the X60.
2239  *
2240  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
2241  *      high speed.  ACPI DSDT seems to map these three speeds to levels
2242  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2243  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2244  *
2245  *      The speeds are stored on handles
2246  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2247  *
2248  *      There are three default speed sets, acessible as handles:
2249  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2250  *
2251  *      ACPI DSDT switches which set is in use depending on various
2252  *      factors.
2253  *
2254  *      TPACPI_FAN_WR_TPEC is also available and should be used to
2255  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
2256  *      but the ACPI tables just mention level 7.
2257  */
2258
2259 static enum fan_status_access_mode fan_status_access_mode;
2260 static enum fan_control_access_mode fan_control_access_mode;
2261 static enum fan_control_commands fan_control_commands;
2262
2263 static u8 fan_control_initial_status;
2264
2265 static void fan_watchdog_fire(struct work_struct *ignored);
2266 static int fan_watchdog_maxinterval;
2267 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2268
2269 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
2270 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
2271            "\\FSPD",            /* 600e/x, 770e, 770x */
2272            );                   /* all others */
2273 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
2274            "JFNS",              /* 770x-JL */
2275            );                   /* all others */
2276
2277 static int __init fan_init(struct ibm_init_struct *iibm)
2278 {
2279         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2280
2281         fan_status_access_mode = TPACPI_FAN_NONE;
2282         fan_control_access_mode = TPACPI_FAN_WR_NONE;
2283         fan_control_commands = 0;
2284         fan_watchdog_maxinterval = 0;
2285         tp_features.fan_ctrl_status_undef = 0;
2286
2287         IBM_ACPIHANDLE_INIT(fans);
2288         IBM_ACPIHANDLE_INIT(gfan);
2289         IBM_ACPIHANDLE_INIT(sfan);
2290
2291         if (gfan_handle) {
2292                 /* 570, 600e/x, 770e, 770x */
2293                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2294         } else {
2295                 /* all other ThinkPads: note that even old-style
2296                  * ThinkPad ECs supports the fan control register */
2297                 if (likely(acpi_ec_read(fan_status_offset,
2298                                         &fan_control_initial_status))) {
2299                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2300
2301                         /* In some ThinkPads, neither the EC nor the ACPI
2302                          * DSDT initialize the fan status, and it ends up
2303                          * being set to 0x07 when it *could* be either
2304                          * 0x07 or 0x80.
2305                          *
2306                          * Enable for TP-1Y (T43), TP-78 (R51e),
2307                          * TP-76 (R52), TP-70 (T43, R52), which are known
2308                          * to be buggy. */
2309                         if (fan_control_initial_status == 0x07 &&
2310                             ibm_thinkpad_ec_found &&
2311                             ((ibm_thinkpad_ec_found[0] == '1' &&
2312                               ibm_thinkpad_ec_found[1] == 'Y') ||
2313                              (ibm_thinkpad_ec_found[0] == '7' &&
2314                               (ibm_thinkpad_ec_found[1] == '6' ||
2315                                ibm_thinkpad_ec_found[1] == '8' ||
2316                                ibm_thinkpad_ec_found[1] == '0'))
2317                             )) {
2318                                 printk(IBM_NOTICE
2319                                        "fan_init: initial fan status is "
2320                                        "unknown, assuming it is in auto "
2321                                        "mode\n");
2322                                 tp_features.fan_ctrl_status_undef = 1;
2323                         }
2324                 } else {
2325                         printk(IBM_ERR
2326                                "ThinkPad ACPI EC access misbehaving, "
2327                                "fan status and control unavailable\n");
2328                         return 1;
2329                 }
2330         }
2331
2332         if (sfan_handle) {
2333                 /* 570, 770x-JL */
2334                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2335                 fan_control_commands |=
2336                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2337         } else {
2338                 if (!gfan_handle) {
2339                         /* gfan without sfan means no fan control */
2340                         /* all other models implement TP EC 0x2f control */
2341
2342                         if (fans_handle) {
2343                                 /* X31, X40, X41 */
2344                                 fan_control_access_mode =
2345                                     TPACPI_FAN_WR_ACPI_FANS;
2346                                 fan_control_commands |=
2347                                     TPACPI_FAN_CMD_SPEED |
2348                                     TPACPI_FAN_CMD_LEVEL |
2349                                     TPACPI_FAN_CMD_ENABLE;
2350                         } else {
2351                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2352                                 fan_control_commands |=
2353                                     TPACPI_FAN_CMD_LEVEL |
2354                                     TPACPI_FAN_CMD_ENABLE;
2355                         }
2356                 }
2357         }
2358
2359         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2360                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2361                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
2362                 fan_status_access_mode, fan_control_access_mode);
2363
2364         return (fan_status_access_mode != TPACPI_FAN_NONE ||
2365                 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2366                         0 : 1;
2367 }
2368
2369 static int fan_get_status(u8 *status)
2370 {
2371         u8 s;
2372
2373         /* TODO:
2374          * Add TPACPI_FAN_RD_ACPI_FANS ? */
2375
2376         switch (fan_status_access_mode) {
2377         case TPACPI_FAN_RD_ACPI_GFAN:
2378                 /* 570, 600e/x, 770e, 770x */
2379
2380                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2381                         return -EIO;
2382
2383                 if (likely(status))
2384                         *status = s & 0x07;
2385
2386                 break;
2387
2388         case TPACPI_FAN_RD_TPEC:
2389                 /* all except 570, 600e/x, 770e, 770x */
2390                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2391                         return -EIO;
2392
2393                 if (likely(status))
2394                         *status = s;
2395
2396                 break;
2397
2398         default:
2399                 return -ENXIO;
2400         }
2401
2402         return 0;
2403 }
2404
2405 static void fan_exit(void)
2406 {
2407         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending watchdogs\n");
2408         cancel_delayed_work(&fan_watchdog_task);
2409         flush_scheduled_work();
2410 }
2411
2412 static int fan_get_speed(unsigned int *speed)
2413 {
2414         u8 hi, lo;
2415
2416         switch (fan_status_access_mode) {
2417         case TPACPI_FAN_RD_TPEC:
2418                 /* all except 570, 600e/x, 770e, 770x */
2419                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2420                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2421                         return -EIO;
2422
2423                 if (likely(speed))
2424                         *speed = (hi << 8) | lo;
2425
2426                 break;
2427
2428         default:
2429                 return -ENXIO;
2430         }
2431
2432         return 0;
2433 }
2434
2435 static void fan_watchdog_fire(struct work_struct *ignored)
2436 {
2437         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2438         if (fan_set_enable()) {
2439                 printk(IBM_ERR "fan watchdog: error while enabling fan\n");
2440                 /* reschedule for later */
2441                 fan_watchdog_reset();
2442         }
2443 }
2444
2445 static void fan_watchdog_reset(void)
2446 {
2447         static int fan_watchdog_active = 0;
2448
2449         if (fan_watchdog_active)
2450                 cancel_delayed_work(&fan_watchdog_task);
2451
2452         if (fan_watchdog_maxinterval > 0) {
2453                 fan_watchdog_active = 1;
2454                 if (!schedule_delayed_work(&fan_watchdog_task,
2455                                 msecs_to_jiffies(fan_watchdog_maxinterval
2456                                                  * 1000))) {
2457                         printk(IBM_ERR "failed to schedule the fan watchdog, "
2458                                "watchdog will not trigger\n");
2459                 }
2460         } else
2461                 fan_watchdog_active = 0;
2462 }
2463
2464 static int fan_set_level(int level)
2465 {
2466         switch (fan_control_access_mode) {
2467         case TPACPI_FAN_WR_ACPI_SFAN:
2468                 if (level >= 0 && level <= 7) {
2469                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2470                                 return -EIO;
2471                 } else
2472                         return -EINVAL;
2473                 break;
2474
2475         case TPACPI_FAN_WR_ACPI_FANS:
2476         case TPACPI_FAN_WR_TPEC:
2477                 if ((level != TP_EC_FAN_AUTO) &&
2478                     (level != TP_EC_FAN_FULLSPEED) &&
2479                     ((level < 0) || (level > 7)))
2480                         return -EINVAL;
2481
2482                 if (!acpi_ec_write(fan_status_offset, level))
2483                         return -EIO;
2484                 else
2485                         tp_features.fan_ctrl_status_undef = 0;
2486                 break;
2487
2488         default:
2489                 return -ENXIO;
2490         }
2491         return 0;
2492 }
2493
2494 static int fan_set_enable(void)
2495 {
2496         u8 s;
2497         int rc;
2498
2499         switch (fan_control_access_mode) {
2500         case TPACPI_FAN_WR_ACPI_FANS:
2501         case TPACPI_FAN_WR_TPEC:
2502                 if ((rc = fan_get_status(&s)) < 0)
2503                         return rc;
2504
2505                 /* Don't go out of emergency fan mode */
2506                 if (s != 7)
2507                         s = TP_EC_FAN_AUTO;
2508
2509                 if (!acpi_ec_write(fan_status_offset, s))
2510                         return -EIO;
2511                 else
2512                         tp_features.fan_ctrl_status_undef = 0;
2513                 break;
2514
2515         case TPACPI_FAN_WR_ACPI_SFAN:
2516                 if ((rc = fan_get_status(&s)) < 0)
2517                         return rc;
2518
2519                 s &= 0x07;
2520
2521                 /* Set fan to at least level 4 */
2522                 if (s < 4)
2523                         s = 4;
2524
2525                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2526                         return -EIO;
2527                 break;
2528
2529         default:
2530                 return -ENXIO;
2531         }
2532         return 0;
2533 }
2534
2535 static int fan_set_disable(void)
2536 {
2537         switch (fan_control_access_mode) {
2538         case TPACPI_FAN_WR_ACPI_FANS:
2539         case TPACPI_FAN_WR_TPEC:
2540                 if (!acpi_ec_write(fan_status_offset, 0x00))
2541                         return -EIO;
2542                 else
2543                         tp_features.fan_ctrl_status_undef = 0;
2544                 break;
2545
2546         case TPACPI_FAN_WR_ACPI_SFAN:
2547                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2548                         return -EIO;
2549                 break;
2550
2551         default:
2552                 return -ENXIO;
2553         }
2554         return 0;
2555 }
2556
2557 static int fan_set_speed(int speed)
2558 {
2559         switch (fan_control_access_mode) {
2560         case TPACPI_FAN_WR_ACPI_FANS:
2561                 if (speed >= 0 && speed <= 65535) {
2562                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2563                                         speed, speed, speed))
2564                                 return -EIO;
2565                 } else
2566                         return -EINVAL;
2567                 break;
2568
2569         default:
2570                 return -ENXIO;
2571         }
2572         return 0;
2573 }
2574
2575 static int fan_read(char *p)
2576 {
2577         int len = 0;
2578         int rc;
2579         u8 status;
2580         unsigned int speed = 0;
2581
2582         switch (fan_status_access_mode) {
2583         case TPACPI_FAN_RD_ACPI_GFAN:
2584                 /* 570, 600e/x, 770e, 770x */
2585                 if ((rc = fan_get_status(&status)) < 0)
2586                         return rc;
2587
2588                 len += sprintf(p + len, "status:\t\t%s\n"
2589                                "level:\t\t%d\n",
2590                                (status != 0) ? "enabled" : "disabled", status);
2591                 break;
2592
2593         case TPACPI_FAN_RD_TPEC:
2594                 /* all except 570, 600e/x, 770e, 770x */
2595                 if ((rc = fan_get_status(&status)) < 0)
2596                         return rc;
2597
2598                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2599                         if (status != fan_control_initial_status)
2600                                 tp_features.fan_ctrl_status_undef = 0;
2601                         else
2602                                 /* Return most likely status. In fact, it
2603                                  * might be the only possible status */
2604                                 status = TP_EC_FAN_AUTO;
2605                 }
2606
2607                 len += sprintf(p + len, "status:\t\t%s\n",
2608                                (status != 0) ? "enabled" : "disabled");
2609
2610                 if ((rc = fan_get_speed(&speed)) < 0)
2611                         return rc;
2612
2613                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2614
2615                 if (status & TP_EC_FAN_FULLSPEED)
2616                         /* Disengaged mode takes precedence */
2617                         len += sprintf(p + len, "level:\t\tdisengaged\n");
2618                 else if (status & TP_EC_FAN_AUTO)
2619                         len += sprintf(p + len, "level:\t\tauto\n");
2620                 else
2621                         len += sprintf(p + len, "level:\t\t%d\n", status);
2622                 break;
2623
2624         case TPACPI_FAN_NONE:
2625         default:
2626                 len += sprintf(p + len, "status:\t\tnot supported\n");
2627         }
2628
2629         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2630                 len += sprintf(p + len, "commands:\tlevel <level>");
2631
2632                 switch (fan_control_access_mode) {
2633                 case TPACPI_FAN_WR_ACPI_SFAN:
2634                         len += sprintf(p + len, " (<level> is 0-7)\n");
2635                         break;
2636
2637                 default:
2638                         len += sprintf(p + len, " (<level> is 0-7, "
2639                                        "auto, disengaged)\n");
2640                         break;
2641                 }
2642         }
2643
2644         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2645                 len += sprintf(p + len, "commands:\tenable, disable\n"
2646                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2647                                "1-120 (seconds))\n");
2648
2649         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2650                 len += sprintf(p + len, "commands:\tspeed <speed>"
2651                                " (<speed> is 0-65535)\n");
2652
2653         return len;
2654 }
2655
2656 static int fan_write_cmd_level(const char *cmd, int *rc)
2657 {
2658         int level;
2659
2660         if (strlencmp(cmd, "level auto") == 0)
2661                 level = TP_EC_FAN_AUTO;
2662         else if (strlencmp(cmd, "level disengaged") == 0)
2663                 level = TP_EC_FAN_FULLSPEED;
2664         else if (sscanf(cmd, "level %d", &level) != 1)
2665                 return 0;
2666
2667         if ((*rc = fan_set_level(level)) == -ENXIO)
2668                 printk(IBM_ERR "level command accepted for unsupported "
2669                        "access mode %d", fan_control_access_mode);
2670
2671         return 1;
2672 }
2673
2674 static int fan_write_cmd_enable(const char *cmd, int *rc)
2675 {
2676         if (strlencmp(cmd, "enable") != 0)
2677                 return 0;
2678
2679         if ((*rc = fan_set_enable()) == -ENXIO)
2680                 printk(IBM_ERR "enable command accepted for unsupported "
2681                        "access mode %d", fan_control_access_mode);
2682
2683         return 1;
2684 }
2685
2686 static int fan_write_cmd_disable(const char *cmd, int *rc)
2687 {
2688         if (strlencmp(cmd, "disable") != 0)
2689                 return 0;
2690
2691         if ((*rc = fan_set_disable()) == -ENXIO)
2692                 printk(IBM_ERR "disable command accepted for unsupported "
2693                        "access mode %d", fan_control_access_mode);
2694
2695         return 1;
2696 }
2697
2698 static int fan_write_cmd_speed(const char *cmd, int *rc)
2699 {
2700         int speed;
2701
2702         /* TODO:
2703          * Support speed <low> <medium> <high> ? */
2704
2705         if (sscanf(cmd, "speed %d", &speed) != 1)
2706                 return 0;
2707
2708         if ((*rc = fan_set_speed(speed)) == -ENXIO)
2709                 printk(IBM_ERR "speed command accepted for unsupported "
2710                        "access mode %d", fan_control_access_mode);
2711
2712         return 1;
2713 }
2714
2715 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2716 {
2717         int interval;
2718
2719         if (sscanf(cmd, "watchdog %d", &interval) != 1)
2720                 return 0;
2721
2722         if (interval < 0 || interval > 120)
2723                 *rc = -EINVAL;
2724         else
2725                 fan_watchdog_maxinterval = interval;
2726
2727         return 1;
2728 }
2729
2730 static int fan_write(char *buf)
2731 {
2732         char *cmd;
2733         int rc = 0;
2734
2735         while (!rc && (cmd = next_cmd(&buf))) {
2736                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2737                       fan_write_cmd_level(cmd, &rc)) &&
2738                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2739                       (fan_write_cmd_enable(cmd, &rc) ||
2740                        fan_write_cmd_disable(cmd, &rc) ||
2741                        fan_write_cmd_watchdog(cmd, &rc))) &&
2742                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2743                       fan_write_cmd_speed(cmd, &rc))
2744                     )
2745                         rc = -EINVAL;
2746                 else if (!rc)
2747                         fan_watchdog_reset();
2748         }
2749
2750         return rc;
2751 }
2752
2753 static struct ibm_struct fan_driver_data = {
2754         .name = "fan",
2755         .read = fan_read,
2756         .write = fan_write,
2757         .exit = fan_exit,
2758         .flags.experimental = 1,
2759 };
2760
2761 /****************************************************************************
2762  ****************************************************************************
2763  *
2764  * Infrastructure
2765  *
2766  ****************************************************************************
2767  ****************************************************************************/
2768
2769 /* /proc support */
2770 static struct proc_dir_entry *proc_dir = NULL;
2771
2772 /* Subdriver registry */
2773 static LIST_HEAD(tpacpi_all_drivers);
2774
2775
2776 /*
2777  * Module and infrastructure proble, init and exit handling
2778  */
2779
2780 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2781 static const char * __init str_supported(int is_supported)
2782 {
2783         static char text_unsupported[] __initdata = "not supported";
2784
2785         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2786 }
2787 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2788
2789 static int __init ibm_init(struct ibm_init_struct *iibm)
2790 {
2791         int ret;
2792         struct ibm_struct *ibm = iibm->data;
2793         struct proc_dir_entry *entry;
2794
2795         BUG_ON(ibm == NULL);
2796
2797         INIT_LIST_HEAD(&ibm->all_drivers);
2798
2799         if (ibm->flags.experimental && !experimental)
2800                 return 0;
2801
2802         dbg_printk(TPACPI_DBG_INIT,
2803                 "probing for %s\n", ibm->name);
2804
2805         if (iibm->init) {
2806                 ret = iibm->init(iibm);
2807                 if (ret > 0)
2808                         return 0;       /* probe failed */
2809                 if (ret)
2810                         return ret;
2811
2812                 ibm->flags.init_called = 1;
2813         }
2814
2815         if (ibm->acpi) {
2816                 if (ibm->acpi->hid) {
2817                         ret = register_tpacpi_subdriver(ibm);
2818                         if (ret)
2819                                 goto err_out;
2820                 }
2821
2822                 if (ibm->acpi->notify) {
2823                         ret = setup_acpi_notify(ibm);
2824                         if (ret == -ENODEV) {
2825                                 printk(IBM_NOTICE "disabling subdriver %s\n",
2826                                         ibm->name);
2827                                 ret = 0;
2828                                 goto err_out;
2829                         }
2830                         if (ret < 0)
2831                                 goto err_out;
2832                 }
2833         }
2834
2835         dbg_printk(TPACPI_DBG_INIT,
2836                 "%s installed\n", ibm->name);
2837
2838         if (ibm->read) {
2839                 entry = create_proc_entry(ibm->name,
2840                                           S_IFREG | S_IRUGO | S_IWUSR,
2841                                           proc_dir);
2842                 if (!entry) {
2843                         printk(IBM_ERR "unable to create proc entry %s\n",
2844                                ibm->name);
2845                         ret = -ENODEV;
2846                         goto err_out;
2847                 }
2848                 entry->owner = THIS_MODULE;
2849                 entry->data = ibm;
2850                 entry->read_proc = &dispatch_procfs_read;
2851                 if (ibm->write)
2852                         entry->write_proc = &dispatch_procfs_write;
2853                 ibm->flags.proc_created = 1;
2854         }
2855
2856         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2857
2858         return 0;
2859
2860 err_out:
2861         dbg_printk(TPACPI_DBG_INIT,
2862                 "%s: at error exit path with result %d\n",
2863                 ibm->name, ret);
2864
2865         ibm_exit(ibm);
2866         return (ret < 0)? ret : 0;
2867 }
2868
2869 static void ibm_exit(struct ibm_struct *ibm)
2870 {
2871         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2872
2873         list_del_init(&ibm->all_drivers);
2874
2875         if (ibm->flags.acpi_notify_installed) {
2876                 dbg_printk(TPACPI_DBG_EXIT,
2877                         "%s: acpi_remove_notify_handler\n", ibm->name);
2878                 BUG_ON(!ibm->acpi);
2879                 acpi_remove_notify_handler(*ibm->acpi->handle,
2880                                            ibm->acpi->type,
2881                                            dispatch_acpi_notify);
2882                 ibm->flags.acpi_notify_installed = 0;
2883                 ibm->flags.acpi_notify_installed = 0;
2884         }
2885
2886         if (ibm->flags.proc_created) {
2887                 dbg_printk(TPACPI_DBG_EXIT,
2888                         "%s: remove_proc_entry\n", ibm->name);
2889                 remove_proc_entry(ibm->name, proc_dir);
2890                 ibm->flags.proc_created = 0;
2891         }
2892
2893         if (ibm->flags.acpi_driver_registered) {
2894                 dbg_printk(TPACPI_DBG_EXIT,
2895                         "%s: acpi_bus_unregister_driver\n", ibm->name);
2896                 BUG_ON(!ibm->acpi);
2897                 acpi_bus_unregister_driver(ibm->acpi->driver);
2898                 kfree(ibm->acpi->driver);
2899                 ibm->acpi->driver = NULL;
2900                 ibm->flags.acpi_driver_registered = 0;
2901         }
2902
2903         if (ibm->flags.init_called && ibm->exit) {
2904                 ibm->exit();
2905                 ibm->flags.init_called = 0;
2906         }
2907
2908         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
2909 }
2910
2911 /* Probing */
2912
2913 static char *ibm_thinkpad_ec_found = NULL;
2914
2915 static char* __init check_dmi_for_ec(void)
2916 {
2917         struct dmi_device *dev = NULL;
2918         char ec_fw_string[18];
2919
2920         /*
2921          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
2922          * X32 or newer, all Z series;  Some models must have an
2923          * up-to-date BIOS or they will not be detected.
2924          *
2925          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
2926          */
2927         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
2928                 if (sscanf(dev->name,
2929                            "IBM ThinkPad Embedded Controller -[%17c",
2930                            ec_fw_string) == 1) {
2931                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
2932                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
2933                         return kstrdup(ec_fw_string, GFP_KERNEL);
2934                 }
2935         }
2936         return NULL;
2937 }
2938
2939 static int __init probe_for_thinkpad(void)
2940 {
2941         int is_thinkpad;
2942
2943         if (acpi_disabled)
2944                 return -ENODEV;
2945
2946         /*
2947          * Non-ancient models have better DMI tagging, but very old models
2948          * don't.
2949          */
2950         is_thinkpad = dmi_name_in_vendors("ThinkPad");
2951
2952         /* ec is required because many other handles are relative to it */
2953         IBM_ACPIHANDLE_INIT(ec);
2954         if (!ec_handle) {
2955                 if (is_thinkpad)
2956                         printk(IBM_ERR
2957                                 "Not yet supported ThinkPad detected!\n");
2958                 return -ENODEV;
2959         }
2960
2961         /*
2962          * Risks a regression on very old machines, but reduces potential
2963          * false positives a damn great deal
2964          */
2965         if (!is_thinkpad)
2966                 is_thinkpad = dmi_name_in_vendors("IBM");
2967
2968         if (!is_thinkpad && !force_load)
2969                 return -ENODEV;
2970
2971         return 0;
2972 }
2973
2974
2975 /* Module init, exit, parameters */
2976
2977 static struct ibm_init_struct ibms_init[] __initdata = {
2978         {
2979                 .init = thinkpad_acpi_driver_init,
2980                 .data = &thinkpad_acpi_driver_data,
2981         },
2982         {
2983                 .init = hotkey_init,
2984                 .data = &hotkey_driver_data,
2985         },
2986         {
2987                 .init = bluetooth_init,
2988                 .data = &bluetooth_driver_data,
2989         },
2990         {
2991                 .init = wan_init,
2992                 .data = &wan_driver_data,
2993         },
2994         {
2995                 .init = video_init,
2996                 .data = &video_driver_data,
2997         },
2998         {
2999                 .init = light_init,
3000                 .data = &light_driver_data,
3001         },
3002 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3003         {
3004                 .init = dock_init,
3005                 .data = &dock_driver_data[0],
3006         },
3007         {
3008                 .data = &dock_driver_data[1],
3009         },
3010 #endif
3011 #ifdef CONFIG_THINKPAD_ACPI_BAY
3012         {
3013                 .init = bay_init,
3014                 .data = &bay_driver_data,
3015         },
3016 #endif
3017         {
3018                 .init = cmos_init,
3019                 .data = &cmos_driver_data,
3020         },
3021         {
3022                 .init = led_init,
3023                 .data = &led_driver_data,
3024         },
3025         {
3026                 .init = beep_init,
3027                 .data = &beep_driver_data,
3028         },
3029         {
3030                 .init = thermal_init,
3031                 .data = &thermal_driver_data,
3032         },
3033         {
3034                 .data = &ecdump_driver_data,
3035         },
3036         {
3037                 .init = brightness_init,
3038                 .data = &brightness_driver_data,
3039         },
3040         {
3041                 .data = &volume_driver_data,
3042         },
3043         {
3044                 .init = fan_init,
3045                 .data = &fan_driver_data,
3046         },
3047 };
3048
3049 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3050 {
3051         unsigned int i;
3052         struct ibm_struct *ibm;
3053
3054         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3055                 ibm = ibms_init[i].data;
3056                 BUG_ON(ibm == NULL);
3057
3058                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3059                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3060                                 return -ENOSPC;
3061                         strcpy(ibms_init[i].param, val);
3062                         strcat(ibms_init[i].param, ",");
3063                         return 0;
3064                 }
3065         }
3066
3067         return -EINVAL;
3068 }
3069
3070 static int experimental;
3071 module_param(experimental, int, 0);
3072
3073 static u32 dbg_level;
3074 module_param_named(debug, dbg_level, uint, 0);
3075
3076 static int force_load;
3077 module_param(force_load, int, 0);
3078
3079 #define IBM_PARAM(feature) \
3080         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3081
3082 IBM_PARAM(hotkey);
3083 IBM_PARAM(bluetooth);
3084 IBM_PARAM(video);
3085 IBM_PARAM(light);
3086 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3087 IBM_PARAM(dock);
3088 #endif
3089 #ifdef CONFIG_THINKPAD_ACPI_BAY
3090 IBM_PARAM(bay);
3091 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3092 IBM_PARAM(cmos);
3093 IBM_PARAM(led);
3094 IBM_PARAM(beep);
3095 IBM_PARAM(ecdump);
3096 IBM_PARAM(brightness);
3097 IBM_PARAM(volume);
3098 IBM_PARAM(fan);
3099
3100 static int __init thinkpad_acpi_module_init(void)
3101 {
3102         int ret, i;
3103
3104         ret = probe_for_thinkpad();
3105         if (ret)
3106                 return ret;
3107
3108         ibm_thinkpad_ec_found = check_dmi_for_ec();
3109         IBM_ACPIHANDLE_INIT(ecrd);
3110         IBM_ACPIHANDLE_INIT(ecwr);
3111
3112         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3113         if (!proc_dir) {
3114                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3115                 thinkpad_acpi_module_exit();
3116                 return -ENODEV;
3117         }
3118         proc_dir->owner = THIS_MODULE;
3119
3120         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3121                 ret = ibm_init(&ibms_init[i]);
3122                 if (ret >= 0 && *ibms_init[i].param)
3123                         ret = ibms_init[i].data->write(ibms_init[i].param);
3124                 if (ret < 0) {
3125                         thinkpad_acpi_module_exit();
3126                         return ret;
3127                 }
3128         }
3129
3130         return 0;
3131 }
3132
3133 static void thinkpad_acpi_module_exit(void)
3134 {
3135         struct ibm_struct *ibm, *itmp;
3136
3137         list_for_each_entry_safe_reverse(ibm, itmp,
3138                                          &tpacpi_all_drivers,
3139                                          all_drivers) {
3140                 ibm_exit(ibm);
3141         }
3142
3143         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3144
3145         if (proc_dir)
3146                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3147
3148         kfree(ibm_thinkpad_ec_found);
3149 }
3150
3151 module_init(thinkpad_acpi_module_init);
3152 module_exit(thinkpad_acpi_module_exit);