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 static int issue_thinkpad_cmos_command(int cmos_cmd)
 277 {
 278         if (!cmos_handle)
 279                 return -ENXIO;
 280
 281         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 282                 return -EIO;
 283
 284         return 0;
 285 }
 286
 287 /*************************************************************************
 288  * ACPI device model
 289  */
 290
 291 static void drv_acpi_handle_init(char *name,
 292                            acpi_handle *handle, acpi_handle parent,
 293                            char **paths, int num_paths, char **path)
 294 {
 295         int i;
 296         acpi_status status;
 297
 298         for (i = 0; i < num_paths; i++) {
 299                 status = acpi_get_handle(parent, paths[i], handle);
 300                 if (ACPI_SUCCESS(status)) {
 301                         *path = paths[i];
 302                         return;
 303                 }
 304         }
 305
 306         *handle = NULL;
 307 }
 308
 309 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 310 {
 311         struct ibm_struct *ibm = data;
 312
 313         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 314                 return;
 315
 316         ibm->acpi->notify(ibm, event);
 317 }
 318
 319 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 320 {
 321         acpi_status status;
 322         int ret;
 323
 324         BUG_ON(!ibm->acpi);
 325
 326         if (!*ibm->acpi->handle)
 327                 return 0;
 328
 329         dbg_printk(TPACPI_DBG_INIT,
 330                 "setting up ACPI notify for %s\n", ibm->name);
 331
 332         ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 333         if (ret < 0) {
 334                 printk(IBM_ERR "%s device not present\n", ibm->name);
 335                 return -ENODEV;
 336         }
 337
 338         acpi_driver_data(ibm->acpi->device) = ibm;
 339         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 340                 IBM_ACPI_EVENT_PREFIX,
 341                 ibm->name);
 342
 343         status = acpi_install_notify_handler(*ibm->acpi->handle,
 344                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 345         if (ACPI_FAILURE(status)) {
 346                 if (status == AE_ALREADY_EXISTS) {
 347                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 348                                 ibm->name);
 349                 } else {
 350                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 351                                 ibm->name, status);
 352                 }
 353                 return -ENODEV;
 354         }
 355         ibm->flags.acpi_notify_installed = 1;
 356         return 0;
 357 }
 358
 359 static int __init tpacpi_device_add(struct acpi_device *device)
 360 {
 361         return 0;
 362 }
 363
 364 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 365 {
 366         int ret;
 367
 368         dbg_printk(TPACPI_DBG_INIT,
 369                 "registering %s as an ACPI driver\n", ibm->name);
 370
 371         BUG_ON(!ibm->acpi);
 372
 373         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 374         if (!ibm->acpi->driver) {
 375                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 376                 return -ENOMEM;
 377         }
 378
 379         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 380         ibm->acpi->driver->ids = ibm->acpi->hid;
 381         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 382
 383         ret = acpi_bus_register_driver(ibm->acpi->driver);
 384         if (ret < 0) {
 385                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 386                        ibm->acpi->hid, ret);
 387                 kfree(ibm->acpi->driver);
 388                 ibm->acpi->driver = NULL;
 389         } else if (!ret)
 390                 ibm->flags.acpi_driver_registered = 1;
 391
 392         return ret;
 393 }
 394
 395
 396 /****************************************************************************
 397  ****************************************************************************
 398  *
 399  * Procfs Helpers
 400  *
 401  ****************************************************************************
 402  ****************************************************************************/
 403
 404 static int dispatch_procfs_read(char *page, char **start, off_t off,
 405                         int count, int *eof, void *data)
 406 {
 407         struct ibm_struct *ibm = data;
 408         int len;
 409
 410         if (!ibm || !ibm->read)
 411                 return -EINVAL;
 412
 413         len = ibm->read(page);
 414         if (len < 0)
 415                 return len;
 416
 417         if (len <= off + count)
 418                 *eof = 1;
 419         *start = page + off;
 420         len -= off;
 421         if (len > count)
 422                 len = count;
 423         if (len < 0)
 424                 len = 0;
 425
 426         return len;
 427 }
 428
 429 static int dispatch_procfs_write(struct file *file,
 430                         const char __user * userbuf,
 431                         unsigned long count, void *data)
 432 {
 433         struct ibm_struct *ibm = data;
 434         char *kernbuf;
 435         int ret;
 436
 437         if (!ibm || !ibm->write)
 438                 return -EINVAL;
 439
 440         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 441         if (!kernbuf)
 442                 return -ENOMEM;
 443
 444         if (copy_from_user(kernbuf, userbuf, count)) {
 445                 kfree(kernbuf);
 446                 return -EFAULT;
 447         }
 448
 449         kernbuf[count] = 0;
 450         strcat(kernbuf, ",");
 451         ret = ibm->write(kernbuf);
 452         if (ret == 0)
 453                 ret = count;
 454
 455         kfree(kernbuf);
 456
 457         return ret;
 458 }
 459
 460 static char *next_cmd(char **cmds)
 461 {
 462         char *start = *cmds;
 463         char *end;
 464
 465         while ((end = strchr(start, ',')) && end == start)
 466                 start = end + 1;
 467
 468         if (!end)
 469                 return NULL;
 470
 471         *end = 0;
 472         *cmds = end + 1;
 473         return start;
 474 }
 475
 476
 477 /****************************************************************************
 478  ****************************************************************************
 479  *
 480  * Subdrivers
 481  *
 482  ****************************************************************************
 483  ****************************************************************************/
 484
 485 /*************************************************************************
 486  * thinkpad-acpi init subdriver
 487  */
 488
 489 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 490 {
 491         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 492         printk(IBM_INFO "%s\n", IBM_URL);
 493
 494         if (ibm_thinkpad_ec_found)
 495                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 496                        ibm_thinkpad_ec_found);
 497
 498         return 0;
 499 }
 500
 501 static int thinkpad_acpi_driver_read(char *p)
 502 {
 503         int len = 0;
 504
 505         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 506         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 507
 508         return len;
 509 }
 510
 511 static struct ibm_struct thinkpad_acpi_driver_data = {
 512         .name = "driver",
 513         .read = thinkpad_acpi_driver_read,
 514 };
 515
 516 /*************************************************************************
 517  * Hotkey subdriver
 518  */
 519
 520 static int hotkey_orig_status;
 521 static int hotkey_orig_mask;
 522
 523 static int __init hotkey_init(struct ibm_init_struct *iibm)
 524 {
 525         int res;
 526
 527         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 528
 529         IBM_ACPIHANDLE_INIT(hkey);
 530
 531         /* hotkey not supported on 570 */
 532         tp_features.hotkey = hkey_handle != NULL;
 533
 534         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 535                 str_supported(tp_features.hotkey));
 536
 537         if (tp_features.hotkey) {
 538                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 539                    A30, R30, R31, T20-22, X20-21, X22-24 */
 540                 tp_features.hotkey_mask =
 541                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 542
 543                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 544                         str_supported(tp_features.hotkey_mask));
 545
 546                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 547                 if (res)
 548                         return res;
 549         }
 550
 551         return (tp_features.hotkey)? 0 : 1;
 552 }
 553
 554 static void hotkey_exit(void)
 555 {
 556         int res;
 557
 558         if (tp_features.hotkey) {
 559                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 560                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 561                 if (res)
 562                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 563         }
 564 }
 565
 566 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 567 {
 568         int hkey;
 569
 570         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 571                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 572         else {
 573                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 574                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 575         }
 576 }
 577
 578 static int hotkey_get(int *status, int *mask)
 579 {
 580         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 581                 return -EIO;
 582
 583         if (tp_features.hotkey_mask)
 584                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 585                         return -EIO;
 586
 587         return 0;
 588 }
 589
 590 static int hotkey_set(int status, int mask)
 591 {
 592         int i;
 593
 594         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 595                 return -EIO;
 596
 597         if (tp_features.hotkey_mask)
 598                 for (i = 0; i < 32; i++) {
 599                         int bit = ((1 << i) & mask) != 0;
 600                         if (!acpi_evalf(hkey_handle,
 601                                         NULL, "MHKM", "vdd", i + 1, bit))
 602                                 return -EIO;
 603                 }
 604
 605         return 0;
 606 }
 607
 608 static int hotkey_read(char *p)
 609 {
 610         int res, status, mask;
 611         int len = 0;
 612
 613         if (!tp_features.hotkey) {
 614                 len += sprintf(p + len, "status:\t\tnot supported\n");
 615                 return len;
 616         }
 617
 618         res = hotkey_get(&status, &mask);
 619         if (res)
 620                 return res;
 621
 622         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 623         if (tp_features.hotkey_mask) {
 624                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 625                 len += sprintf(p + len,
 626                                "commands:\tenable, disable, reset, <mask>\n");
 627         } else {
 628                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 629                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 630         }
 631
 632         return len;
 633 }
 634
 635 static int hotkey_write(char *buf)
 636 {
 637         int res, status, mask;
 638         char *cmd;
 639         int do_cmd = 0;
 640
 641         if (!tp_features.hotkey)
 642                 return -ENODEV;
 643
 644         res = hotkey_get(&status, &mask);
 645         if (res)
 646                 return res;
 647
 648         while ((cmd = next_cmd(&buf))) {
 649                 if (strlencmp(cmd, "enable") == 0) {
 650                         status = 1;
 651                 } else if (strlencmp(cmd, "disable") == 0) {
 652                         status = 0;
 653                 } else if (strlencmp(cmd, "reset") == 0) {
 654                         status = hotkey_orig_status;
 655                         mask = hotkey_orig_mask;
 656                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 657                         /* mask set */
 658                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 659                         /* mask set */
 660                 } else
 661                         return -EINVAL;
 662                 do_cmd = 1;
 663         }
 664
 665         if (do_cmd) {
 666                 res = hotkey_set(status, mask);
 667                 if (res)
 668                         return res;
 669         }
 670
 671         return 0;
 672 }
 673
 674 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
 675         .hid = IBM_HKEY_HID,
 676         .notify = hotkey_notify,
 677         .handle = &hkey_handle,
 678         .type = ACPI_DEVICE_NOTIFY,
 679 };
 680
 681 static struct ibm_struct hotkey_driver_data = {
 682         .name = "hotkey",
 683         .read = hotkey_read,
 684         .write = hotkey_write,
 685         .exit = hotkey_exit,
 686         .acpi = &ibm_hotkey_acpidriver,
 687 };
 688
 689 /*************************************************************************
 690  * Bluetooth subdriver
 691  */
 692
 693 static int __init bluetooth_init(struct ibm_init_struct *iibm)
 694 {
 695         int status = 0;
 696
 697         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
 698
 699         IBM_ACPIHANDLE_INIT(hkey);
 700
 701         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 702            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 703         tp_features.bluetooth = hkey_handle &&
 704             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
 705
 706         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
 707                 str_supported(tp_features.bluetooth),
 708                 status);
 709
 710         if (tp_features.bluetooth &&
 711             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
 712                 /* no bluetooth hardware present in system */
 713                 tp_features.bluetooth = 0;
 714                 dbg_printk(TPACPI_DBG_INIT,
 715                            "bluetooth hardware not installed\n");
 716         }
 717
 718         return (tp_features.bluetooth)? 0 : 1;
 719 }
 720
 721 static int bluetooth_get_radiosw(void)
 722 {
 723         int status;
 724
 725         if (!tp_features.bluetooth)
 726                 return -ENODEV;
 727
 728         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 729                 return -EIO;
 730
 731         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
 732 }
 733
 734 static int bluetooth_set_radiosw(int radio_on)
 735 {
 736         int status;
 737
 738         if (!tp_features.bluetooth)
 739                 return -ENODEV;
 740
 741         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 742                 return -EIO;
 743         if (radio_on)
 744                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
 745         else
 746                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
 747         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 748                 return -EIO;
 749
 750         return 0;
 751 }
 752
 753 static int bluetooth_read(char *p)
 754 {
 755         int len = 0;
 756         int status = bluetooth_get_radiosw();
 757
 758         if (!tp_features.bluetooth)
 759                 len += sprintf(p + len, "status:\t\tnot supported\n");
 760         else {
 761                 len += sprintf(p + len, "status:\t\t%s\n",
 762                                 (status)? "enabled" : "disabled");
 763                 len += sprintf(p + len, "commands:\tenable, disable\n");
 764         }
 765
 766         return len;
 767 }
 768
 769 static int bluetooth_write(char *buf)
 770 {
 771         char *cmd;
 772
 773         if (!tp_features.bluetooth)
 774                 return -ENODEV;
 775
 776         while ((cmd = next_cmd(&buf))) {
 777                 if (strlencmp(cmd, "enable") == 0) {
 778                         bluetooth_set_radiosw(1);
 779                 } else if (strlencmp(cmd, "disable") == 0) {
 780                         bluetooth_set_radiosw(0);
 781                 } else
 782                         return -EINVAL;
 783         }
 784
 785         return 0;
 786 }
 787
 788 static struct ibm_struct bluetooth_driver_data = {
 789         .name = "bluetooth",
 790         .read = bluetooth_read,
 791         .write = bluetooth_write,
 792 };
 793
 794 /*************************************************************************
 795  * Wan subdriver
 796  */
 797
 798 static int __init wan_init(struct ibm_init_struct *iibm)
 799 {
 800         int status = 0;
 801
 802         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
 803
 804         IBM_ACPIHANDLE_INIT(hkey);
 805
 806         tp_features.wan = hkey_handle &&
 807             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
 808
 809         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
 810                 str_supported(tp_features.wan),
 811                 status);
 812
 813         if (tp_features.wan &&
 814             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
 815                 /* no wan hardware present in system */
 816                 tp_features.wan = 0;
 817                 dbg_printk(TPACPI_DBG_INIT,
 818                            "wan hardware not installed\n");
 819         }
 820
 821         return (tp_features.wan)? 0 : 1;
 822 }
 823
 824 static int wan_get_radiosw(void)
 825 {
 826         int status;
 827
 828         if (!tp_features.wan)
 829                 return -ENODEV;
 830
 831         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 832                 return -EIO;
 833
 834         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
 835 }
 836
 837 static int wan_set_radiosw(int radio_on)
 838 {
 839         int status;
 840
 841         if (!tp_features.wan)
 842                 return -ENODEV;
 843
 844         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
 845                 return -EIO;
 846         if (radio_on)
 847                 status |= TP_ACPI_WANCARD_RADIOSSW;
 848         else
 849                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
 850         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
 851                 return -EIO;
 852
 853         return 0;
 854 }
 855
 856 static int wan_read(char *p)
 857 {
 858         int len = 0;
 859         int status = wan_get_radiosw();
 860
 861         if (!tp_features.wan)
 862                 len += sprintf(p + len, "status:\t\tnot supported\n");
 863         else {
 864                 len += sprintf(p + len, "status:\t\t%s\n",
 865                                 (status)? "enabled" : "disabled");
 866                 len += sprintf(p + len, "commands:\tenable, disable\n");
 867         }
 868
 869         return len;
 870 }
 871
 872 static int wan_write(char *buf)
 873 {
 874         char *cmd;
 875
 876         if (!tp_features.wan)
 877                 return -ENODEV;
 878
 879         while ((cmd = next_cmd(&buf))) {
 880                 if (strlencmp(cmd, "enable") == 0) {
 881                         wan_set_radiosw(1);
 882                 } else if (strlencmp(cmd, "disable") == 0) {
 883                         wan_set_radiosw(0);
 884                 } else
 885                         return -EINVAL;
 886         }
 887
 888         return 0;
 889 }
 890
 891 static struct ibm_struct wan_driver_data = {
 892         .name = "wan",
 893         .read = wan_read,
 894         .write = wan_write,
 895         .flags.experimental = 1,
 896 };
 897
 898 /*************************************************************************
 899  * Video subdriver
 900  */
 901
 902 static enum video_access_mode video_supported;
 903 static int video_orig_autosw;
 904
 905 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 906            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 907            "\\_SB.PCI0.VID0",   /* 770e */
 908            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 909            "\\_SB.PCI0.AGP.VID",        /* all others */
 910            );                           /* R30, R31 */
 911
 912 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 913
 914 static int __init video_init(struct ibm_init_struct *iibm)
 915 {
 916         int ivga;
 917
 918         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
 919
 920         IBM_ACPIHANDLE_INIT(vid);
 921         IBM_ACPIHANDLE_INIT(vid2);
 922
 923         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 924                 /* G41, assume IVGA doesn't change */
 925                 vid_handle = vid2_handle;
 926
 927         if (!vid_handle)
 928                 /* video switching not supported on R30, R31 */
 929                 video_supported = TPACPI_VIDEO_NONE;
 930         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 931                 /* 570 */
 932                 video_supported = TPACPI_VIDEO_570;
 933         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 934                 /* 600e/x, 770e, 770x */
 935                 video_supported = TPACPI_VIDEO_770;
 936         else
 937                 /* all others */
 938                 video_supported = TPACPI_VIDEO_NEW;
 939
 940         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
 941                 str_supported(video_supported != TPACPI_VIDEO_NONE),
 942                 video_supported);
 943
 944         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
 945 }
 946
 947 static void video_exit(void)
 948 {
 949         dbg_printk(TPACPI_DBG_EXIT,
 950                    "restoring original video autoswitch mode\n");
 951         if (video_autosw_set(video_orig_autosw))
 952                 printk(IBM_ERR "error while trying to restore original "
 953                         "video autoswitch mode\n");
 954 }
 955
 956 static int video_outputsw_get(void)
 957 {
 958         int status = 0;
 959         int i;
 960
 961         switch (video_supported) {
 962         case TPACPI_VIDEO_570:
 963                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
 964                                  TP_ACPI_VIDEO_570_PHSCMD))
 965                         return -EIO;
 966                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
 967                 break;
 968         case TPACPI_VIDEO_770:
 969                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
 970                         return -EIO;
 971                 if (i)
 972                         status |= TP_ACPI_VIDEO_S_LCD;
 973                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
 974                         return -EIO;
 975                 if (i)
 976                         status |= TP_ACPI_VIDEO_S_CRT;
 977                 break;
 978         case TPACPI_VIDEO_NEW:
 979                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
 980                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
 981                         return -EIO;
 982                 if (i)
 983                         status |= TP_ACPI_VIDEO_S_CRT;
 984
 985                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
 986                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
 987                         return -EIO;
 988                 if (i)
 989                         status |= TP_ACPI_VIDEO_S_LCD;
 990                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
 991                         return -EIO;
 992                 if (i)
 993                         status |= TP_ACPI_VIDEO_S_DVI;
 994                 break;
 995         default:
 996                 return -ENOSYS;
 997         }
 998
 999         return status;
1000 }
1001
1002 static int video_outputsw_set(int status)
1003 {
1004         int autosw;
1005         int res = 0;
1006
1007         switch (video_supported) {
1008         case TPACPI_VIDEO_570:
1009                 res = acpi_evalf(NULL, NULL,
1010                                  "\\_SB.PHS2", "vdd",
1011                                  TP_ACPI_VIDEO_570_PHS2CMD,
1012                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1013                 break;
1014         case TPACPI_VIDEO_770:
1015                 autosw = video_autosw_get();
1016                 if (autosw < 0)
1017                         return autosw;
1018
1019                 res = video_autosw_set(1);
1020                 if (res)
1021                         return res;
1022                 res = acpi_evalf(vid_handle, NULL,
1023                                  "ASWT", "vdd", status * 0x100, 0);
1024                 if (!autosw && video_autosw_set(autosw)) {
1025                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1026                         return -EIO;
1027                 }
1028                 break;
1029         case TPACPI_VIDEO_NEW:
1030                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1031                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1032                 break;
1033         default:
1034                 return -ENOSYS;
1035         }
1036
1037         return (res)? 0 : -EIO;
1038 }
1039
1040 static int video_autosw_get(void)
1041 {
1042         int autosw = 0;
1043
1044         switch (video_supported) {
1045         case TPACPI_VIDEO_570:
1046                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1047                         return -EIO;
1048                 break;
1049         case TPACPI_VIDEO_770:
1050         case TPACPI_VIDEO_NEW:
1051                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1052                         return -EIO;
1053                 break;
1054         default:
1055                 return -ENOSYS;
1056         }
1057
1058         return autosw & 1;
1059 }
1060
1061 static int video_autosw_set(int enable)
1062 {
1063         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1064                 return -EIO;
1065         return 0;
1066 }
1067
1068 static int video_outputsw_cycle(void)
1069 {
1070         int autosw = video_autosw_get();
1071         int res;
1072
1073         if (autosw < 0)
1074                 return autosw;
1075
1076         switch (video_supported) {
1077         case TPACPI_VIDEO_570:
1078                 res = video_autosw_set(1);
1079                 if (res)
1080                         return res;
1081                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1082                 break;
1083         case TPACPI_VIDEO_770:
1084         case TPACPI_VIDEO_NEW:
1085                 res = video_autosw_set(1);
1086                 if (res)
1087                         return res;
1088                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1089                 break;
1090         default:
1091                 return -ENOSYS;
1092         }
1093         if (!autosw && video_autosw_set(autosw)) {
1094                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1095                 return -EIO;
1096         }
1097
1098         return (res)? 0 : -EIO;
1099 }
1100
1101 static int video_expand_toggle(void)
1102 {
1103         switch (video_supported) {
1104         case TPACPI_VIDEO_570:
1105                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1106                         0 : -EIO;
1107         case TPACPI_VIDEO_770:
1108                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1109                         0 : -EIO;
1110         case TPACPI_VIDEO_NEW:
1111                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1112                         0 : -EIO;
1113         default:
1114                 return -ENOSYS;
1115         }
1116         /* not reached */
1117 }
1118
1119 static int video_read(char *p)
1120 {
1121         int status, autosw;
1122         int len = 0;
1123
1124         if (video_supported == TPACPI_VIDEO_NONE) {
1125                 len += sprintf(p + len, "status:\t\tnot supported\n");
1126                 return len;
1127         }
1128
1129         status = video_outputsw_get();
1130         if (status < 0)
1131                 return status;
1132
1133         autosw = video_autosw_get();
1134         if (autosw < 0)
1135                 return autosw;
1136
1137         len += sprintf(p + len, "status:\t\tsupported\n");
1138         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1139         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1140         if (video_supported == TPACPI_VIDEO_NEW)
1141                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1142         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1143         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1144         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1145         if (video_supported == TPACPI_VIDEO_NEW)
1146                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1147         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1148         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1149
1150         return len;
1151 }
1152
1153 static int video_write(char *buf)
1154 {
1155         char *cmd;
1156         int enable, disable, status;
1157         int res;
1158
1159         if (video_supported == TPACPI_VIDEO_NONE)
1160                 return -ENODEV;
1161
1162         enable = 0;
1163         disable = 0;
1164
1165         while ((cmd = next_cmd(&buf))) {
1166                 if (strlencmp(cmd, "lcd_enable") == 0) {
1167                         enable |= TP_ACPI_VIDEO_S_LCD;
1168                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1169                         disable |= TP_ACPI_VIDEO_S_LCD;
1170                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1171                         enable |= TP_ACPI_VIDEO_S_CRT;
1172                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1173                         disable |= TP_ACPI_VIDEO_S_CRT;
1174                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1175                            strlencmp(cmd, "dvi_enable") == 0) {
1176                         enable |= TP_ACPI_VIDEO_S_DVI;
1177                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1178                            strlencmp(cmd, "dvi_disable") == 0) {
1179                         disable |= TP_ACPI_VIDEO_S_DVI;
1180                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1181                         res = video_autosw_set(1);
1182                         if (res)
1183                                 return res;
1184                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1185                         res = video_autosw_set(0);
1186                         if (res)
1187                                 return res;
1188                 } else if (strlencmp(cmd, "video_switch") == 0) {
1189                         res = video_outputsw_cycle();
1190                         if (res)
1191                                 return res;
1192                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1193                         res = video_expand_toggle();
1194                         if (res)
1195                                 return res;
1196                 } else
1197                         return -EINVAL;
1198         }
1199
1200         if (enable || disable) {
1201                 status = video_outputsw_get();
1202                 if (status < 0)
1203                         return status;
1204                 res = video_outputsw_set((status & ~disable) | enable);
1205                 if (res)
1206                         return res;
1207         }
1208
1209         return 0;
1210 }
1211
1212 static struct ibm_struct video_driver_data = {
1213         .name = "video",
1214         .read = video_read,
1215         .write = video_write,
1216         .exit = video_exit,
1217 };
1218
1219 /*************************************************************************
1220  * Light (thinklight) subdriver
1221  */
1222
1223 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1224 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1225
1226 static int __init light_init(struct ibm_init_struct *iibm)
1227 {
1228         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1229
1230         IBM_ACPIHANDLE_INIT(ledb);
1231         IBM_ACPIHANDLE_INIT(lght);
1232         IBM_ACPIHANDLE_INIT(cmos);
1233
1234         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1235         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1236
1237         if (tp_features.light)
1238                 /* light status not supported on
1239                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1240                 tp_features.light_status =
1241                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1242
1243         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1244                 str_supported(tp_features.light));
1245
1246         return (tp_features.light)? 0 : 1;
1247 }
1248
1249 static int light_read(char *p)
1250 {
1251         int len = 0;
1252         int status = 0;
1253
1254         if (!tp_features.light) {
1255                 len += sprintf(p + len, "status:\t\tnot supported\n");
1256         } else if (!tp_features.light_status) {
1257                 len += sprintf(p + len, "status:\t\tunknown\n");
1258                 len += sprintf(p + len, "commands:\ton, off\n");
1259         } else {
1260                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1261                         return -EIO;
1262                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1263                 len += sprintf(p + len, "commands:\ton, off\n");
1264         }
1265
1266         return len;
1267 }
1268
1269 static int light_write(char *buf)
1270 {
1271         int cmos_cmd, lght_cmd;
1272         char *cmd;
1273         int success;
1274
1275         if (!tp_features.light)
1276                 return -ENODEV;
1277
1278         while ((cmd = next_cmd(&buf))) {
1279                 if (strlencmp(cmd, "on") == 0) {
1280                         cmos_cmd = 0x0c;
1281                         lght_cmd = 1;
1282                 } else if (strlencmp(cmd, "off") == 0) {
1283                         cmos_cmd = 0x0d;
1284                         lght_cmd = 0;
1285                 } else
1286                         return -EINVAL;
1287
1288                 success = cmos_handle ?
1289                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1290                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1291                 if (!success)
1292                         return -EIO;
1293         }
1294
1295         return 0;
1296 }
1297
1298 static struct ibm_struct light_driver_data = {
1299         .name = "light",
1300         .read = light_read,
1301         .write = light_write,
1302 };
1303
1304 /*************************************************************************
1305  * Dock subdriver
1306  */
1307
1308 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1309
1310 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1311            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1312            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1313            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1314     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1315
1316 /* don't list other alternatives as we install a notify handler on the 570 */
1317 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1318
1319 #define dock_docked() (_sta(dock_handle) & 1)
1320
1321 static int __init dock_init(struct ibm_init_struct *iibm)
1322 {
1323         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1324
1325         IBM_ACPIHANDLE_INIT(dock);
1326         IBM_ACPIHANDLE_INIT(pci);
1327
1328         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1329                 str_supported(dock_handle != NULL));
1330
1331         return (dock_handle)? 0 : 1;
1332 }
1333
1334 static void dock_notify(struct ibm_struct *ibm, u32 event)
1335 {
1336         int docked = dock_docked();
1337         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1338
1339         if (event == 1 && !pci) /* 570 */
1340                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1341         else if (event == 1 && pci)     /* 570 */
1342                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1343         else if (event == 3 && docked)
1344                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1345         else if (event == 3 && !docked)
1346                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1347         else if (event == 0 && docked)
1348                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1349         else {
1350                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1351                        event, _sta(dock_handle));
1352                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1353         }
1354 }
1355
1356 static int dock_read(char *p)
1357 {
1358         int len = 0;
1359         int docked = dock_docked();
1360
1361         if (!dock_handle)
1362                 len += sprintf(p + len, "status:\t\tnot supported\n");
1363         else if (!docked)
1364                 len += sprintf(p + len, "status:\t\tundocked\n");
1365         else {
1366                 len += sprintf(p + len, "status:\t\tdocked\n");
1367                 len += sprintf(p + len, "commands:\tdock, undock\n");
1368         }
1369
1370         return len;
1371 }
1372
1373 static int dock_write(char *buf)
1374 {
1375         char *cmd;
1376
1377         if (!dock_docked())
1378                 return -ENODEV;
1379
1380         while ((cmd = next_cmd(&buf))) {
1381                 if (strlencmp(cmd, "undock") == 0) {
1382                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1383                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1384                                 return -EIO;
1385                 } else if (strlencmp(cmd, "dock") == 0) {
1386                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1387                                 return -EIO;
1388                 } else
1389                         return -EINVAL;
1390         }
1391
1392         return 0;
1393 }
1394
1395 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1396         {
1397          .notify = dock_notify,
1398          .handle = &dock_handle,
1399          .type = ACPI_SYSTEM_NOTIFY,
1400         },
1401         {
1402          .hid = IBM_PCI_HID,
1403          .notify = dock_notify,
1404          .handle = &pci_handle,
1405          .type = ACPI_SYSTEM_NOTIFY,
1406         },
1407 };
1408
1409 static struct ibm_struct dock_driver_data[2] = {
1410         {
1411          .name = "dock",
1412          .read = dock_read,
1413          .write = dock_write,
1414          .acpi = &ibm_dock_acpidriver[0],
1415         },
1416         {
1417          .name = "dock",
1418          .acpi = &ibm_dock_acpidriver[1],
1419         },
1420 };
1421
1422 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1423
1424 /*************************************************************************
1425  * Bay subdriver
1426  */
1427
1428 #ifdef CONFIG_THINKPAD_ACPI_BAY
1429 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1430            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1431            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1432            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1433            );                           /* A21e, R30, R31 */
1434 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1435            "_EJ0",              /* all others */
1436            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1437 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
1438            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1439            );                           /* all others */
1440 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
1441            "_EJ0",                      /* 770x */
1442            );                           /* all others */
1443
1444 static int __init bay_init(struct ibm_init_struct *iibm)
1445 {
1446         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1447
1448         IBM_ACPIHANDLE_INIT(bay);
1449         if (bay_handle)
1450                 IBM_ACPIHANDLE_INIT(bay_ej);
1451         IBM_ACPIHANDLE_INIT(bay2);
1452         if (bay2_handle)
1453                 IBM_ACPIHANDLE_INIT(bay2_ej);
1454
1455         tp_features.bay_status = bay_handle &&
1456                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1457         tp_features.bay_status2 = bay2_handle &&
1458                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1459
1460         tp_features.bay_eject = bay_handle && bay_ej_handle &&
1461                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1462         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1463                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1464
1465         vdbg_printk(TPACPI_DBG_INIT,
1466                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1467                 str_supported(tp_features.bay_status),
1468                 str_supported(tp_features.bay_eject),
1469                 str_supported(tp_features.bay_status2),
1470                 str_supported(tp_features.bay_eject2));
1471
1472         return (tp_features.bay_status || tp_features.bay_eject ||
1473                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1474 }
1475
1476 static void bay_notify(struct ibm_struct *ibm, u32 event)
1477 {
1478         acpi_bus_generate_event(ibm->acpi->device, event, 0);
1479 }
1480
1481 #define bay_occupied(b) (_sta(b##_handle) & 1)
1482
1483 static int bay_read(char *p)
1484 {
1485         int len = 0;
1486         int occupied = bay_occupied(bay);
1487         int occupied2 = bay_occupied(bay2);
1488         int eject, eject2;
1489
1490         len += sprintf(p + len, "status:\t\t%s\n",
1491                 tp_features.bay_status ?
1492                         (occupied ? "occupied" : "unoccupied") :
1493                                 "not supported");
1494         if (tp_features.bay_status2)
1495                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1496                                "occupied" : "unoccupied");
1497
1498         eject = tp_features.bay_eject && occupied;
1499         eject2 = tp_features.bay_eject2 && occupied2;
1500
1501         if (eject && eject2)
1502                 len += sprintf(p + len, "commands:\teject, eject2\n");
1503         else if (eject)
1504                 len += sprintf(p + len, "commands:\teject\n");
1505         else if (eject2)
1506                 len += sprintf(p + len, "commands:\teject2\n");
1507
1508         return len;
1509 }
1510
1511 static int bay_write(char *buf)
1512 {
1513         char *cmd;
1514
1515         if (!tp_features.bay_eject && !tp_features.bay_eject2)
1516                 return -ENODEV;
1517
1518         while ((cmd = next_cmd(&buf))) {
1519                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1520                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1521                                 return -EIO;
1522                 } else if (tp_features.bay_eject2 &&
1523                            strlencmp(cmd, "eject2") == 0) {
1524                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1525                                 return -EIO;
1526                 } else
1527                         return -EINVAL;
1528         }
1529
1530         return 0;
1531 }
1532
1533 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1534         .notify = bay_notify,
1535         .handle = &bay_handle,
1536         .type = ACPI_SYSTEM_NOTIFY,
1537 };
1538
1539 static struct ibm_struct bay_driver_data = {
1540         .name = "bay",
1541         .read = bay_read,
1542         .write = bay_write,
1543         .acpi = &ibm_bay_acpidriver,
1544 };
1545
1546 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1547
1548 /*************************************************************************
1549  * CMOS subdriver
1550  */
1551
1552 static int __init cmos_init(struct ibm_init_struct *iibm)
1553 {
1554         vdbg_printk(TPACPI_DBG_INIT,
1555                 "initializing cmos commands subdriver\n");
1556
1557         IBM_ACPIHANDLE_INIT(cmos);
1558
1559         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1560                 str_supported(cmos_handle != NULL));
1561         return (cmos_handle)? 0 : 1;
1562 }
1563
1564 static int cmos_read(char *p)
1565 {
1566         int len = 0;
1567
1568         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1569            R30, R31, T20-22, X20-21 */
1570         if (!cmos_handle)
1571                 len += sprintf(p + len, "status:\t\tnot supported\n");
1572         else {
1573                 len += sprintf(p + len, "status:\t\tsupported\n");
1574                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1575         }
1576
1577         return len;
1578 }
1579
1580 static int cmos_write(char *buf)
1581 {
1582         char *cmd;
1583         int cmos_cmd, res;
1584
1585         while ((cmd = next_cmd(&buf))) {
1586                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1587                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1588                         /* cmos_cmd set */
1589                 } else
1590                         return -EINVAL;
1591
1592                 res = issue_thinkpad_cmos_command(cmos_cmd);
1593                 if (res)
1594                         return res;
1595         }
1596
1597         return 0;
1598 }
1599
1600 static struct ibm_struct cmos_driver_data = {
1601         .name = "cmos",
1602         .read = cmos_read,
1603         .write = cmos_write,
1604 };
1605
1606 /*************************************************************************
1607  * LED subdriver
1608  */
1609
1610 static enum led_access_mode led_supported;
1611
1612 IBM_HANDLE(led, ec, "SLED",     /* 570 */
1613            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1614            "LED",               /* all others */
1615            );                   /* R30, R31 */
1616
1617 static int __init led_init(struct ibm_init_struct *iibm)
1618 {
1619         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1620
1621         IBM_ACPIHANDLE_INIT(led);
1622
1623         if (!led_handle)
1624                 /* led not supported on R30, R31 */
1625                 led_supported = TPACPI_LED_NONE;
1626         else if (strlencmp(led_path, "SLED") == 0)
1627                 /* 570 */
1628                 led_supported = TPACPI_LED_570;
1629         else if (strlencmp(led_path, "SYSL") == 0)
1630                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1631                 led_supported = TPACPI_LED_OLD;
1632         else
1633                 /* all others */
1634                 led_supported = TPACPI_LED_NEW;
1635
1636         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1637                 str_supported(led_supported), led_supported);
1638
1639         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1640 }
1641
1642 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1643
1644 static int led_read(char *p)
1645 {
1646         int len = 0;
1647
1648         if (!led_supported) {
1649                 len += sprintf(p + len, "status:\t\tnot supported\n");
1650                 return len;
1651         }
1652         len += sprintf(p + len, "status:\t\tsupported\n");
1653
1654         if (led_supported == TPACPI_LED_570) {
1655                 /* 570 */
1656                 int i, status;
1657                 for (i = 0; i < 8; i++) {
1658                         if (!acpi_evalf(ec_handle,
1659                                         &status, "GLED", "dd", 1 << i))
1660                                 return -EIO;
1661                         len += sprintf(p + len, "%d:\t\t%s\n",
1662                                        i, led_status(status));
1663                 }
1664         }
1665
1666         len += sprintf(p + len, "commands:\t"
1667                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1668
1669         return len;
1670 }
1671
1672 /* off, on, blink */
1673 static const int led_sled_arg1[] = { 0, 1, 3 };
1674 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1675 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1676 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1677
1678 static int led_write(char *buf)
1679 {
1680         char *cmd;
1681         int led, ind, ret;
1682
1683         if (!led_supported)
1684                 return -ENODEV;
1685
1686         while ((cmd = next_cmd(&buf))) {
1687                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1688                         return -EINVAL;
1689
1690                 if (strstr(cmd, "off")) {
1691                         ind = 0;
1692                 } else if (strstr(cmd, "on")) {
1693                         ind = 1;
1694                 } else if (strstr(cmd, "blink")) {
1695                         ind = 2;
1696                 } else
1697                         return -EINVAL;
1698
1699                 if (led_supported == TPACPI_LED_570) {
1700                         /* 570 */
1701                         led = 1 << led;
1702                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1703                                         led, led_sled_arg1[ind]))
1704                                 return -EIO;
1705                 } else if (led_supported == TPACPI_LED_OLD) {
1706                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1707                         led = 1 << led;
1708                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
1709                         if (ret >= 0)
1710                                 ret =
1711                                     ec_write(TPACPI_LED_EC_HLBL,
1712                                              led * led_exp_hlbl[ind]);
1713                         if (ret >= 0)
1714                                 ret =
1715                                     ec_write(TPACPI_LED_EC_HLCL,
1716                                              led * led_exp_hlcl[ind]);
1717                         if (ret < 0)
1718                                 return ret;
1719                 } else {
1720                         /* all others */
1721                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1722                                         led, led_led_arg1[ind]))
1723                                 return -EIO;
1724                 }
1725         }
1726
1727         return 0;
1728 }
1729
1730 static struct ibm_struct led_driver_data = {
1731         .name = "led",
1732         .read = led_read,
1733         .write = led_write,
1734 };
1735
1736 /*************************************************************************
1737  * Beep subdriver
1738  */
1739
1740 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
1741
1742 static int __init beep_init(struct ibm_init_struct *iibm)
1743 {
1744         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1745
1746         IBM_ACPIHANDLE_INIT(beep);
1747
1748         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1749                 str_supported(beep_handle != NULL));
1750
1751         return (beep_handle)? 0 : 1;
1752 }
1753
1754 static int beep_read(char *p)
1755 {
1756         int len = 0;
1757
1758         if (!beep_handle)
1759                 len += sprintf(p + len, "status:\t\tnot supported\n");
1760         else {
1761                 len += sprintf(p + len, "status:\t\tsupported\n");
1762                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1763         }
1764
1765         return len;
1766 }
1767
1768 static int beep_write(char *buf)
1769 {
1770         char *cmd;
1771         int beep_cmd;
1772
1773         if (!beep_handle)
1774                 return -ENODEV;
1775
1776         while ((cmd = next_cmd(&buf))) {
1777                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1778                     beep_cmd >= 0 && beep_cmd <= 17) {
1779                         /* beep_cmd set */
1780                 } else
1781                         return -EINVAL;
1782                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1783                         return -EIO;
1784         }
1785
1786         return 0;
1787 }
1788
1789 static struct ibm_struct beep_driver_data = {
1790         .name = "beep",
1791         .read = beep_read,
1792         .write = beep_write,
1793 };
1794
1795 /*************************************************************************
1796  * Thermal subdriver
1797  */
1798
1799 static enum thermal_access_mode thermal_read_mode;
1800
1801 static int __init thermal_init(struct ibm_init_struct *iibm)
1802 {
1803         u8 t, ta1, ta2;
1804         int i;
1805         int acpi_tmp7;
1806
1807         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
1808
1809         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1810
1811         if (ibm_thinkpad_ec_found && experimental) {
1812                 /*
1813                  * Direct EC access mode: sensors at registers
1814                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
1815                  * non-implemented, thermal sensors return 0x80 when
1816                  * not available
1817                  */
1818
1819                 ta1 = ta2 = 0;
1820                 for (i = 0; i < 8; i++) {
1821                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
1822                                 ta1 |= t;
1823                         } else {
1824                                 ta1 = 0;
1825                                 break;
1826                         }
1827                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
1828                                 ta2 |= t;
1829                         } else {
1830                                 ta1 = 0;
1831                                 break;
1832                         }
1833                 }
1834                 if (ta1 == 0) {
1835                         /* This is sheer paranoia, but we handle it anyway */
1836                         if (acpi_tmp7) {
1837                                 printk(IBM_ERR
1838                                        "ThinkPad ACPI EC access misbehaving, "
1839                                        "falling back to ACPI TMPx access mode\n");
1840                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1841                         } else {
1842                                 printk(IBM_ERR
1843                                        "ThinkPad ACPI EC access misbehaving, "
1844                                        "disabling thermal sensors access\n");
1845                                 thermal_read_mode = TPACPI_THERMAL_NONE;
1846                         }
1847                 } else {
1848                         thermal_read_mode =
1849                             (ta2 != 0) ?
1850                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
1851                 }
1852         } else if (acpi_tmp7) {
1853                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
1854                         /* 600e/x, 770e, 770x */
1855                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
1856                 } else {
1857                         /* Standard ACPI TMPx access, max 8 sensors */
1858                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
1859                 }
1860         } else {
1861                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
1862                 thermal_read_mode = TPACPI_THERMAL_NONE;
1863         }
1864
1865         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
1866                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
1867                 thermal_read_mode);
1868
1869         return (thermal_read_mode != TPACPI_THERMAL_NONE)? 0 : 1;
1870 }
1871
1872 /* idx is zero-based */
1873 static int thermal_get_sensor(int idx, s32 *value)
1874 {
1875         int t;
1876         s8 tmp;
1877         char tmpi[5];
1878
1879         t = TP_EC_THERMAL_TMP0;
1880
1881         switch (thermal_read_mode) {
1882 #if TPACPI_MAX_THERMAL_SENSORS >= 16
1883         case TPACPI_THERMAL_TPEC_16:
1884                 if (idx >= 8 && idx <= 15) {
1885                         t = TP_EC_THERMAL_TMP8;
1886                         idx -= 8;
1887                 }
1888                 /* fallthrough */
1889 #endif
1890         case TPACPI_THERMAL_TPEC_8:
1891                 if (idx <= 7) {
1892                         if (!acpi_ec_read(t + idx, &tmp))
1893                                 return -EIO;
1894                         *value = tmp * 1000;
1895                         return 0;
1896                 }
1897                 break;
1898
1899         case TPACPI_THERMAL_ACPI_UPDT:
1900                 if (idx <= 7) {
1901                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
1902                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1903                                 return -EIO;
1904                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1905                                 return -EIO;
1906                         *value = (t - 2732) * 100;
1907                         return 0;
1908                 }
1909                 break;
1910
1911         case TPACPI_THERMAL_ACPI_TMP07:
1912                 if (idx <= 7) {
1913                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
1914                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1915                                 return -EIO;
1916                         *value = t * 1000;
1917                         return 0;
1918                 }
1919                 break;
1920
1921         case TPACPI_THERMAL_NONE:
1922         default:
1923                 return -ENOSYS;
1924         }
1925
1926         return -EINVAL;
1927 }
1928
1929 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
1930 {
1931         int res, i;
1932         int n;
1933
1934         n = 8;
1935         i = 0;
1936
1937         if (!s)
1938                 return -EINVAL;
1939
1940         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
1941                 n = 16;
1942
1943         for(i = 0 ; i < n; i++) {
1944                 res = thermal_get_sensor(i, &s->temp[i]);
1945                 if (res)
1946                         return res;
1947         }
1948
1949         return n;
1950 }
1951
1952 static int thermal_read(char *p)
1953 {
1954         int len = 0;
1955         int n, i;
1956         struct ibm_thermal_sensors_struct t;
1957
1958         n = thermal_get_sensors(&t);
1959         if (unlikely(n < 0))
1960                 return n;
1961
1962         len += sprintf(p + len, "temperatures:\t");
1963
1964         if (n > 0) {
1965                 for (i = 0; i < (n - 1); i++)
1966                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
1967                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
1968         } else
1969                 len += sprintf(p + len, "not supported\n");
1970
1971         return len;
1972 }
1973
1974 static struct ibm_struct thermal_driver_data = {
1975         .name = "thermal",
1976         .read = thermal_read,
1977 };
1978
1979 /*************************************************************************
1980  * EC Dump subdriver
1981  */
1982
1983 static u8 ecdump_regs[256];
1984
1985 static int ecdump_read(char *p)
1986 {
1987         int len = 0;
1988         int i, j;
1989         u8 v;
1990
1991         len += sprintf(p + len, "EC      "
1992                        " +00 +01 +02 +03 +04 +05 +06 +07"
1993                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1994         for (i = 0; i < 256; i += 16) {
1995                 len += sprintf(p + len, "EC 0x%02x:", i);
1996                 for (j = 0; j < 16; j++) {
1997                         if (!acpi_ec_read(i + j, &v))
1998                                 break;
1999                         if (v != ecdump_regs[i + j])
2000                                 len += sprintf(p + len, " *%02x", v);
2001                         else
2002                                 len += sprintf(p + len, "  %02x", v);
2003                         ecdump_regs[i + j] = v;
2004                 }
2005                 len += sprintf(p + len, "\n");
2006                 if (j != 16)
2007                         break;
2008         }
2009
2010         /* These are way too dangerous to advertise openly... */
2011 #if 0
2012         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2013                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2014         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2015                        " (<offset> is 00-ff, <value> is 0-255)\n");
2016 #endif
2017         return len;
2018 }
2019
2020 static int ecdump_write(char *buf)
2021 {
2022         char *cmd;
2023         int i, v;
2024
2025         while ((cmd = next_cmd(&buf))) {
2026                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2027                         /* i and v set */
2028                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2029                         /* i and v set */
2030                 } else
2031                         return -EINVAL;
2032                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2033                         if (!acpi_ec_write(i, v))
2034                                 return -EIO;
2035                 } else
2036                         return -EINVAL;
2037         }
2038
2039         return 0;
2040 }
2041
2042 static struct ibm_struct ecdump_driver_data = {
2043         .name = "ecdump",
2044         .read = ecdump_read,
2045         .write = ecdump_write,
2046         .flags.experimental = 1,
2047 };
2048
2049 /*************************************************************************
2050  * Backlight/brightness subdriver
2051  */
2052
2053 static struct backlight_device *ibm_backlight_device = NULL;
2054
2055 static struct backlight_ops ibm_backlight_data = {
2056         .get_brightness = brightness_get,
2057         .update_status  = brightness_update_status,
2058 };
2059
2060 static int __init brightness_init(struct ibm_init_struct *iibm)
2061 {
2062         int b;
2063
2064         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2065
2066         b = brightness_get(NULL);
2067         if (b < 0)
2068                 return b;
2069
2070         ibm_backlight_device = backlight_device_register("ibm", NULL, NULL,
2071                                                          &ibm_backlight_data);
2072         if (IS_ERR(ibm_backlight_device)) {
2073                 printk(IBM_ERR "Could not register backlight device\n");
2074                 return PTR_ERR(ibm_backlight_device);
2075         }
2076         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2077
2078         ibm_backlight_device->props.max_brightness = 7;
2079         ibm_backlight_device->props.brightness = b;
2080         backlight_update_status(ibm_backlight_device);
2081
2082         return 0;
2083 }
2084
2085 static void brightness_exit(void)
2086 {
2087         if (ibm_backlight_device) {
2088                 vdbg_printk(TPACPI_DBG_EXIT,
2089                             "calling backlight_device_unregister()\n");
2090                 backlight_device_unregister(ibm_backlight_device);
2091                 ibm_backlight_device = NULL;
2092         }
2093 }
2094
2095 static int brightness_update_status(struct backlight_device *bd)
2096 {
2097         return brightness_set(
2098                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2099                  bd->props.power == FB_BLANK_UNBLANK) ?
2100                                 bd->props.brightness : 0);
2101 }
2102
2103 static int brightness_get(struct backlight_device *bd)
2104 {
2105         u8 level;
2106         if (!acpi_ec_read(brightness_offset, &level))
2107                 return -EIO;
2108
2109         level &= 0x7;
2110
2111         return level;
2112 }
2113
2114 static int brightness_set(int value)
2115 {
2116         int cmos_cmd, inc, i;
2117         int current_value = brightness_get(NULL);
2118
2119         value &= 7;
2120
2121         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2122         inc = value > current_value ? 1 : -1;
2123         for (i = current_value; i != value; i += inc) {
2124                 if (issue_thinkpad_cmos_command(cmos_cmd))
2125                         return -EIO;
2126                 if (!acpi_ec_write(brightness_offset, i + inc))
2127                         return -EIO;
2128         }
2129
2130         return 0;
2131 }
2132
2133 static int brightness_read(char *p)
2134 {
2135         int len = 0;
2136         int level;
2137
2138         if ((level = brightness_get(NULL)) < 0) {
2139                 len += sprintf(p + len, "level:\t\tunreadable\n");
2140         } else {
2141                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2142                 len += sprintf(p + len, "commands:\tup, down\n");
2143                 len += sprintf(p + len, "commands:\tlevel <level>"
2144                                " (<level> is 0-7)\n");
2145         }
2146
2147         return len;
2148 }
2149
2150 static int brightness_write(char *buf)
2151 {
2152         int level;
2153         int new_level;
2154         char *cmd;
2155
2156         while ((cmd = next_cmd(&buf))) {
2157                 if ((level = brightness_get(NULL)) < 0)
2158                         return level;
2159                 level &= 7;
2160
2161                 if (strlencmp(cmd, "up") == 0) {
2162                         new_level = level == 7 ? 7 : level + 1;
2163                 } else if (strlencmp(cmd, "down") == 0) {
2164                         new_level = level == 0 ? 0 : level - 1;
2165                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2166                            new_level >= 0 && new_level <= 7) {
2167                         /* new_level set */
2168                 } else
2169                         return -EINVAL;
2170
2171                 brightness_set(new_level);
2172         }
2173
2174         return 0;
2175 }
2176
2177 static struct ibm_struct brightness_driver_data = {
2178         .name = "brightness",
2179         .read = brightness_read,
2180         .write = brightness_write,
2181         .exit = brightness_exit,
2182 };
2183
2184 /*************************************************************************
2185  * Volume subdriver
2186  */
2187
2188 static int volume_read(char *p)
2189 {
2190         int len = 0;
2191         u8 level;
2192
2193         if (!acpi_ec_read(volume_offset, &level)) {
2194                 len += sprintf(p + len, "level:\t\tunreadable\n");
2195         } else {
2196                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2197                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2198                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2199                 len += sprintf(p + len, "commands:\tlevel <level>"
2200                                " (<level> is 0-15)\n");
2201         }
2202
2203         return len;
2204 }
2205
2206 static int volume_write(char *buf)
2207 {
2208         int cmos_cmd, inc, i;
2209         u8 level, mute;
2210         int new_level, new_mute;
2211         char *cmd;
2212
2213         while ((cmd = next_cmd(&buf))) {
2214                 if (!acpi_ec_read(volume_offset, &level))
2215                         return -EIO;
2216                 new_mute = mute = level & 0x40;
2217                 new_level = level = level & 0xf;
2218
2219                 if (strlencmp(cmd, "up") == 0) {
2220                         if (mute)
2221                                 new_mute = 0;
2222                         else
2223                                 new_level = level == 15 ? 15 : level + 1;
2224                 } else if (strlencmp(cmd, "down") == 0) {
2225                         if (mute)
2226                                 new_mute = 0;
2227                         else
2228                                 new_level = level == 0 ? 0 : level - 1;
2229                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2230                            new_level >= 0 && new_level <= 15) {
2231                         /* new_level set */
2232                 } else if (strlencmp(cmd, "mute") == 0) {
2233                         new_mute = 0x40;
2234                 } else
2235                         return -EINVAL;
2236
2237                 if (new_level != level) {       /* mute doesn't change */
2238                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2239                         inc = new_level > level ? 1 : -1;
2240
2241                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2242                                      !acpi_ec_write(volume_offset, level)))
2243                                 return -EIO;
2244
2245                         for (i = level; i != new_level; i += inc)
2246                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2247                                     !acpi_ec_write(volume_offset, i + inc))
2248                                         return -EIO;
2249
2250                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2251                                      !acpi_ec_write(volume_offset,
2252                                                     new_level + mute)))
2253                                 return -EIO;
2254                 }
2255
2256                 if (new_mute != mute) { /* level doesn't change */
2257                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2258
2259                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
2260                             !acpi_ec_write(volume_offset, level + new_mute))
2261                                 return -EIO;
2262                 }
2263         }
2264
2265         return 0;
2266 }
2267
2268 static struct ibm_struct volume_driver_data = {
2269         .name = "volume",
2270         .read = volume_read,
2271         .write = volume_write,
2272 };
2273
2274 /*************************************************************************
2275  * Fan subdriver
2276  */
2277
2278 /*
2279  * FAN ACCESS MODES
2280  *
2281  * TPACPI_FAN_RD_ACPI_GFAN:
2282  *      ACPI GFAN method: returns fan level
2283  *
2284  *      see TPACPI_FAN_WR_ACPI_SFAN
2285  *      EC 0x2f (HFSP) not available if GFAN exists
2286  *
2287  * TPACPI_FAN_WR_ACPI_SFAN:
2288  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2289  *
2290  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
2291  *      it for writing.
2292  *
2293  * TPACPI_FAN_WR_TPEC:
2294  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
2295  *      Supported on almost all ThinkPads
2296  *
2297  *      Fan speed changes of any sort (including those caused by the
2298  *      disengaged mode) are usually done slowly by the firmware as the
2299  *      maximum ammount of fan duty cycle change per second seems to be
2300  *      limited.
2301  *
2302  *      Reading is not available if GFAN exists.
2303  *      Writing is not available if SFAN exists.
2304  *
2305  *      Bits
2306  *       7      automatic mode engaged;
2307  *              (default operation mode of the ThinkPad)
2308  *              fan level is ignored in this mode.
2309  *       6      full speed mode (takes precedence over bit 7);
2310  *              not available on all thinkpads.  May disable
2311  *              the tachometer while the fan controller ramps up
2312  *              the speed (which can take up to a few *minutes*).
2313  *              Speeds up fan to 100% duty-cycle, which is far above
2314  *              the standard RPM levels.  It is not impossible that
2315  *              it could cause hardware damage.
2316  *      5-3     unused in some models.  Extra bits for fan level
2317  *              in others, but still useless as all values above
2318  *              7 map to the same speed as level 7 in these models.
2319  *      2-0     fan level (0..7 usually)
2320  *                      0x00 = stop
2321  *                      0x07 = max (set when temperatures critical)
2322  *              Some ThinkPads may have other levels, see
2323  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2324  *
2325  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2326  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2327  *      does so, its initial value is meaningless (0x07).
2328  *
2329  *      For firmware bugs, refer to:
2330  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2331  *
2332  *      ----
2333  *
2334  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2335  *      Main fan tachometer reading (in RPM)
2336  *
2337  *      This register is present on all ThinkPads with a new-style EC, and
2338  *      it is known not to be present on the A21m/e, and T22, as there is
2339  *      something else in offset 0x84 according to the ACPI DSDT.  Other
2340  *      ThinkPads from this same time period (and earlier) probably lack the
2341  *      tachometer as well.
2342  *
2343  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2344  *      was never fixed by IBM to report the EC firmware version string
2345  *      probably support the tachometer (like the early X models), so
2346  *      detecting it is quite hard.  We need more data to know for sure.
2347  *
2348  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2349  *      might result.
2350  *
2351  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
2352  *      mode.
2353  *
2354  *      For firmware bugs, refer to:
2355  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2356  *
2357  * TPACPI_FAN_WR_ACPI_FANS:
2358  *      ThinkPad X31, X40, X41.  Not available in the X60.
2359  *
2360  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
2361  *      high speed.  ACPI DSDT seems to map these three speeds to levels
2362  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2363  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2364  *
2365  *      The speeds are stored on handles
2366  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2367  *
2368  *      There are three default speed sets, acessible as handles:
2369  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2370  *
2371  *      ACPI DSDT switches which set is in use depending on various
2372  *      factors.
2373  *
2374  *      TPACPI_FAN_WR_TPEC is also available and should be used to
2375  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
2376  *      but the ACPI tables just mention level 7.
2377  */
2378
2379 static enum fan_status_access_mode fan_status_access_mode;
2380 static enum fan_control_access_mode fan_control_access_mode;
2381 static enum fan_control_commands fan_control_commands;
2382
2383 static u8 fan_control_initial_status;
2384
2385 static void fan_watchdog_fire(struct work_struct *ignored);
2386 static int fan_watchdog_maxinterval;
2387 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2388
2389 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
2390 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
2391            "\\FSPD",            /* 600e/x, 770e, 770x */
2392            );                   /* all others */
2393 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
2394            "JFNS",              /* 770x-JL */
2395            );                   /* all others */
2396
2397 static int __init fan_init(struct ibm_init_struct *iibm)
2398 {
2399         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2400
2401         fan_status_access_mode = TPACPI_FAN_NONE;
2402         fan_control_access_mode = TPACPI_FAN_WR_NONE;
2403         fan_control_commands = 0;
2404         fan_watchdog_maxinterval = 0;
2405         tp_features.fan_ctrl_status_undef = 0;
2406
2407         IBM_ACPIHANDLE_INIT(fans);
2408         IBM_ACPIHANDLE_INIT(gfan);
2409         IBM_ACPIHANDLE_INIT(sfan);
2410
2411         if (gfan_handle) {
2412                 /* 570, 600e/x, 770e, 770x */
2413                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2414         } else {
2415                 /* all other ThinkPads: note that even old-style
2416                  * ThinkPad ECs supports the fan control register */
2417                 if (likely(acpi_ec_read(fan_status_offset,
2418                                         &fan_control_initial_status))) {
2419                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2420
2421                         /* In some ThinkPads, neither the EC nor the ACPI
2422                          * DSDT initialize the fan status, and it ends up
2423                          * being set to 0x07 when it *could* be either
2424                          * 0x07 or 0x80.
2425                          *
2426                          * Enable for TP-1Y (T43), TP-78 (R51e),
2427                          * TP-76 (R52), TP-70 (T43, R52), which are known
2428                          * to be buggy. */
2429                         if (fan_control_initial_status == 0x07 &&
2430                             ibm_thinkpad_ec_found &&
2431                             ((ibm_thinkpad_ec_found[0] == '1' &&
2432                               ibm_thinkpad_ec_found[1] == 'Y') ||
2433                              (ibm_thinkpad_ec_found[0] == '7' &&
2434                               (ibm_thinkpad_ec_found[1] == '6' ||
2435                                ibm_thinkpad_ec_found[1] == '8' ||
2436                                ibm_thinkpad_ec_found[1] == '0'))
2437                             )) {
2438                                 printk(IBM_NOTICE
2439                                        "fan_init: initial fan status is "
2440                                        "unknown, assuming it is in auto "
2441                                        "mode\n");
2442                                 tp_features.fan_ctrl_status_undef = 1;
2443                         }
2444                 } else {
2445                         printk(IBM_ERR
2446                                "ThinkPad ACPI EC access misbehaving, "
2447                                "fan status and control unavailable\n");
2448                         return 1;
2449                 }
2450         }
2451
2452         if (sfan_handle) {
2453                 /* 570, 770x-JL */
2454                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
2455                 fan_control_commands |=
2456                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
2457         } else {
2458                 if (!gfan_handle) {
2459                         /* gfan without sfan means no fan control */
2460                         /* all other models implement TP EC 0x2f control */
2461
2462                         if (fans_handle) {
2463                                 /* X31, X40, X41 */
2464                                 fan_control_access_mode =
2465                                     TPACPI_FAN_WR_ACPI_FANS;
2466                                 fan_control_commands |=
2467                                     TPACPI_FAN_CMD_SPEED |
2468                                     TPACPI_FAN_CMD_LEVEL |
2469                                     TPACPI_FAN_CMD_ENABLE;
2470                         } else {
2471                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
2472                                 fan_control_commands |=
2473                                     TPACPI_FAN_CMD_LEVEL |
2474                                     TPACPI_FAN_CMD_ENABLE;
2475                         }
2476                 }
2477         }
2478
2479         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
2480                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
2481                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
2482                 fan_status_access_mode, fan_control_access_mode);
2483
2484         return (fan_status_access_mode != TPACPI_FAN_NONE ||
2485                 fan_control_access_mode != TPACPI_FAN_WR_NONE)?
2486                         0 : 1;
2487 }
2488
2489 static int fan_get_status(u8 *status)
2490 {
2491         u8 s;
2492
2493         /* TODO:
2494          * Add TPACPI_FAN_RD_ACPI_FANS ? */
2495
2496         switch (fan_status_access_mode) {
2497         case TPACPI_FAN_RD_ACPI_GFAN:
2498                 /* 570, 600e/x, 770e, 770x */
2499
2500                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
2501                         return -EIO;
2502
2503                 if (likely(status))
2504                         *status = s & 0x07;
2505
2506                 break;
2507
2508         case TPACPI_FAN_RD_TPEC:
2509                 /* all except 570, 600e/x, 770e, 770x */
2510                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
2511                         return -EIO;
2512
2513                 if (likely(status))
2514                         *status = s;
2515
2516                 break;
2517
2518         default:
2519                 return -ENXIO;
2520         }
2521
2522         return 0;
2523 }
2524
2525 static void fan_exit(void)
2526 {
2527         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
2528         cancel_delayed_work(&fan_watchdog_task);
2529         flush_scheduled_work();
2530 }
2531
2532 static int fan_get_speed(unsigned int *speed)
2533 {
2534         u8 hi, lo;
2535
2536         switch (fan_status_access_mode) {
2537         case TPACPI_FAN_RD_TPEC:
2538                 /* all except 570, 600e/x, 770e, 770x */
2539                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
2540                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
2541                         return -EIO;
2542
2543                 if (likely(speed))
2544                         *speed = (hi << 8) | lo;
2545
2546                 break;
2547
2548         default:
2549                 return -ENXIO;
2550         }
2551
2552         return 0;
2553 }
2554
2555 static void fan_watchdog_fire(struct work_struct *ignored)
2556 {
2557         int rc;
2558
2559         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
2560         rc = fan_set_enable();
2561         if (rc < 0) {
2562                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
2563                         "will try again later...\n", -rc);
2564                 /* reschedule for later */
2565                 fan_watchdog_reset();
2566         }
2567 }
2568
2569 static void fan_watchdog_reset(void)
2570 {
2571         static int fan_watchdog_active = 0;
2572
2573         if (fan_watchdog_active)
2574                 cancel_delayed_work(&fan_watchdog_task);
2575
2576         if (fan_watchdog_maxinterval > 0) {
2577                 fan_watchdog_active = 1;
2578                 if (!schedule_delayed_work(&fan_watchdog_task,
2579                                 msecs_to_jiffies(fan_watchdog_maxinterval
2580                                                  * 1000))) {
2581                         printk(IBM_ERR "failed to schedule the fan watchdog, "
2582                                "watchdog will not trigger\n");
2583                 }
2584         } else
2585                 fan_watchdog_active = 0;
2586 }
2587
2588 static int fan_set_level(int level)
2589 {
2590         switch (fan_control_access_mode) {
2591         case TPACPI_FAN_WR_ACPI_SFAN:
2592                 if (level >= 0 && level <= 7) {
2593                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
2594                                 return -EIO;
2595                 } else
2596                         return -EINVAL;
2597                 break;
2598
2599         case TPACPI_FAN_WR_ACPI_FANS:
2600         case TPACPI_FAN_WR_TPEC:
2601                 if ((level != TP_EC_FAN_AUTO) &&
2602                     (level != TP_EC_FAN_FULLSPEED) &&
2603                     ((level < 0) || (level > 7)))
2604                         return -EINVAL;
2605
2606                 if (!acpi_ec_write(fan_status_offset, level))
2607                         return -EIO;
2608                 else
2609                         tp_features.fan_ctrl_status_undef = 0;
2610                 break;
2611
2612         default:
2613                 return -ENXIO;
2614         }
2615         return 0;
2616 }
2617
2618 static int fan_set_enable(void)
2619 {
2620         u8 s;
2621         int rc;
2622
2623         switch (fan_control_access_mode) {
2624         case TPACPI_FAN_WR_ACPI_FANS:
2625         case TPACPI_FAN_WR_TPEC:
2626                 if ((rc = fan_get_status(&s)) < 0)
2627                         return rc;
2628
2629                 /* Don't go out of emergency fan mode */
2630                 if (s != 7)
2631                         s = TP_EC_FAN_AUTO;
2632
2633                 if (!acpi_ec_write(fan_status_offset, s))
2634                         return -EIO;
2635                 else
2636                         tp_features.fan_ctrl_status_undef = 0;
2637                 break;
2638
2639         case TPACPI_FAN_WR_ACPI_SFAN:
2640                 if ((rc = fan_get_status(&s)) < 0)
2641                         return rc;
2642
2643                 s &= 0x07;
2644
2645                 /* Set fan to at least level 4 */
2646                 if (s < 4)
2647                         s = 4;
2648
2649                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
2650                         return -EIO;
2651                 break;
2652
2653         default:
2654                 return -ENXIO;
2655         }
2656         return 0;
2657 }
2658
2659 static int fan_set_disable(void)
2660 {
2661         switch (fan_control_access_mode) {
2662         case TPACPI_FAN_WR_ACPI_FANS:
2663         case TPACPI_FAN_WR_TPEC:
2664                 if (!acpi_ec_write(fan_status_offset, 0x00))
2665                         return -EIO;
2666                 else
2667                         tp_features.fan_ctrl_status_undef = 0;
2668                 break;
2669
2670         case TPACPI_FAN_WR_ACPI_SFAN:
2671                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
2672                         return -EIO;
2673                 break;
2674
2675         default:
2676                 return -ENXIO;
2677         }
2678         return 0;
2679 }
2680
2681 static int fan_set_speed(int speed)
2682 {
2683         switch (fan_control_access_mode) {
2684         case TPACPI_FAN_WR_ACPI_FANS:
2685                 if (speed >= 0 && speed <= 65535) {
2686                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
2687                                         speed, speed, speed))
2688                                 return -EIO;
2689                 } else
2690                         return -EINVAL;
2691                 break;
2692
2693         default:
2694                 return -ENXIO;
2695         }
2696         return 0;
2697 }
2698
2699 static int fan_read(char *p)
2700 {
2701         int len = 0;
2702         int rc;
2703         u8 status;
2704         unsigned int speed = 0;
2705
2706         switch (fan_status_access_mode) {
2707         case TPACPI_FAN_RD_ACPI_GFAN:
2708                 /* 570, 600e/x, 770e, 770x */
2709                 if ((rc = fan_get_status(&status)) < 0)
2710                         return rc;
2711
2712                 len += sprintf(p + len, "status:\t\t%s\n"
2713                                "level:\t\t%d\n",
2714                                (status != 0) ? "enabled" : "disabled", status);
2715                 break;
2716
2717         case TPACPI_FAN_RD_TPEC:
2718                 /* all except 570, 600e/x, 770e, 770x */
2719                 if ((rc = fan_get_status(&status)) < 0)
2720                         return rc;
2721
2722                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
2723                         if (status != fan_control_initial_status)
2724                                 tp_features.fan_ctrl_status_undef = 0;
2725                         else
2726                                 /* Return most likely status. In fact, it
2727                                  * might be the only possible status */
2728                                 status = TP_EC_FAN_AUTO;
2729                 }
2730
2731                 len += sprintf(p + len, "status:\t\t%s\n",
2732                                (status != 0) ? "enabled" : "disabled");
2733
2734                 if ((rc = fan_get_speed(&speed)) < 0)
2735                         return rc;
2736
2737                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
2738
2739                 if (status & TP_EC_FAN_FULLSPEED)
2740                         /* Disengaged mode takes precedence */
2741                         len += sprintf(p + len, "level:\t\tdisengaged\n");
2742                 else if (status & TP_EC_FAN_AUTO)
2743                         len += sprintf(p + len, "level:\t\tauto\n");
2744                 else
2745                         len += sprintf(p + len, "level:\t\t%d\n", status);
2746                 break;
2747
2748         case TPACPI_FAN_NONE:
2749         default:
2750                 len += sprintf(p + len, "status:\t\tnot supported\n");
2751         }
2752
2753         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
2754                 len += sprintf(p + len, "commands:\tlevel <level>");
2755
2756                 switch (fan_control_access_mode) {
2757                 case TPACPI_FAN_WR_ACPI_SFAN:
2758                         len += sprintf(p + len, " (<level> is 0-7)\n");
2759                         break;
2760
2761                 default:
2762                         len += sprintf(p + len, " (<level> is 0-7, "
2763                                        "auto, disengaged)\n");
2764                         break;
2765                 }
2766         }
2767
2768         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
2769                 len += sprintf(p + len, "commands:\tenable, disable\n"
2770                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
2771                                "1-120 (seconds))\n");
2772
2773         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
2774                 len += sprintf(p + len, "commands:\tspeed <speed>"
2775                                " (<speed> is 0-65535)\n");
2776
2777         return len;
2778 }
2779
2780 static int fan_write_cmd_level(const char *cmd, int *rc)
2781 {
2782         int level;
2783
2784         if (strlencmp(cmd, "level auto") == 0)
2785                 level = TP_EC_FAN_AUTO;
2786         else if (strlencmp(cmd, "level disengaged") == 0)
2787                 level = TP_EC_FAN_FULLSPEED;
2788         else if (sscanf(cmd, "level %d", &level) != 1)
2789                 return 0;
2790
2791         if ((*rc = fan_set_level(level)) == -ENXIO)
2792                 printk(IBM_ERR "level command accepted for unsupported "
2793                        "access mode %d", fan_control_access_mode);
2794
2795         return 1;
2796 }
2797
2798 static int fan_write_cmd_enable(const char *cmd, int *rc)
2799 {
2800         if (strlencmp(cmd, "enable") != 0)
2801                 return 0;
2802
2803         if ((*rc = fan_set_enable()) == -ENXIO)
2804                 printk(IBM_ERR "enable command accepted for unsupported "
2805                        "access mode %d", fan_control_access_mode);
2806
2807         return 1;
2808 }
2809
2810 static int fan_write_cmd_disable(const char *cmd, int *rc)
2811 {
2812         if (strlencmp(cmd, "disable") != 0)
2813                 return 0;
2814
2815         if ((*rc = fan_set_disable()) == -ENXIO)
2816                 printk(IBM_ERR "disable command accepted for unsupported "
2817                        "access mode %d", fan_control_access_mode);
2818
2819         return 1;
2820 }
2821
2822 static int fan_write_cmd_speed(const char *cmd, int *rc)
2823 {
2824         int speed;
2825
2826         /* TODO:
2827          * Support speed <low> <medium> <high> ? */
2828
2829         if (sscanf(cmd, "speed %d", &speed) != 1)
2830                 return 0;
2831
2832         if ((*rc = fan_set_speed(speed)) == -ENXIO)
2833                 printk(IBM_ERR "speed command accepted for unsupported "
2834                        "access mode %d", fan_control_access_mode);
2835
2836         return 1;
2837 }
2838
2839 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
2840 {
2841         int interval;
2842
2843         if (sscanf(cmd, "watchdog %d", &interval) != 1)
2844                 return 0;
2845
2846         if (interval < 0 || interval > 120)
2847                 *rc = -EINVAL;
2848         else
2849                 fan_watchdog_maxinterval = interval;
2850
2851         return 1;
2852 }
2853
2854 static int fan_write(char *buf)
2855 {
2856         char *cmd;
2857         int rc = 0;
2858
2859         while (!rc && (cmd = next_cmd(&buf))) {
2860                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
2861                       fan_write_cmd_level(cmd, &rc)) &&
2862                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
2863                       (fan_write_cmd_enable(cmd, &rc) ||
2864                        fan_write_cmd_disable(cmd, &rc) ||
2865                        fan_write_cmd_watchdog(cmd, &rc))) &&
2866                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
2867                       fan_write_cmd_speed(cmd, &rc))
2868                     )
2869                         rc = -EINVAL;
2870                 else if (!rc)
2871                         fan_watchdog_reset();
2872         }
2873
2874         return rc;
2875 }
2876
2877 static struct ibm_struct fan_driver_data = {
2878         .name = "fan",
2879         .read = fan_read,
2880         .write = fan_write,
2881         .exit = fan_exit,
2882         .flags.experimental = 1,
2883 };
2884
2885 /****************************************************************************
2886  ****************************************************************************
2887  *
2888  * Infrastructure
2889  *
2890  ****************************************************************************
2891  ****************************************************************************/
2892
2893 /* /proc support */
2894 static struct proc_dir_entry *proc_dir = NULL;
2895
2896 /* Subdriver registry */
2897 static LIST_HEAD(tpacpi_all_drivers);
2898
2899
2900 /*
2901  * Module and infrastructure proble, init and exit handling
2902  */
2903
2904 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
2905 static const char * __init str_supported(int is_supported)
2906 {
2907         static char text_unsupported[] __initdata = "not supported";
2908
2909         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
2910 }
2911 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
2912
2913 static int __init ibm_init(struct ibm_init_struct *iibm)
2914 {
2915         int ret;
2916         struct ibm_struct *ibm = iibm->data;
2917         struct proc_dir_entry *entry;
2918
2919         BUG_ON(ibm == NULL);
2920
2921         INIT_LIST_HEAD(&ibm->all_drivers);
2922
2923         if (ibm->flags.experimental && !experimental)
2924                 return 0;
2925
2926         dbg_printk(TPACPI_DBG_INIT,
2927                 "probing for %s\n", ibm->name);
2928
2929         if (iibm->init) {
2930                 ret = iibm->init(iibm);
2931                 if (ret > 0)
2932                         return 0;       /* probe failed */
2933                 if (ret)
2934                         return ret;
2935
2936                 ibm->flags.init_called = 1;
2937         }
2938
2939         if (ibm->acpi) {
2940                 if (ibm->acpi->hid) {
2941                         ret = register_tpacpi_subdriver(ibm);
2942                         if (ret)
2943                                 goto err_out;
2944                 }
2945
2946                 if (ibm->acpi->notify) {
2947                         ret = setup_acpi_notify(ibm);
2948                         if (ret == -ENODEV) {
2949                                 printk(IBM_NOTICE "disabling subdriver %s\n",
2950                                         ibm->name);
2951                                 ret = 0;
2952                                 goto err_out;
2953                         }
2954                         if (ret < 0)
2955                                 goto err_out;
2956                 }
2957         }
2958
2959         dbg_printk(TPACPI_DBG_INIT,
2960                 "%s installed\n", ibm->name);
2961
2962         if (ibm->read) {
2963                 entry = create_proc_entry(ibm->name,
2964                                           S_IFREG | S_IRUGO | S_IWUSR,
2965                                           proc_dir);
2966                 if (!entry) {
2967                         printk(IBM_ERR "unable to create proc entry %s\n",
2968                                ibm->name);
2969                         ret = -ENODEV;
2970                         goto err_out;
2971                 }
2972                 entry->owner = THIS_MODULE;
2973                 entry->data = ibm;
2974                 entry->read_proc = &dispatch_procfs_read;
2975                 if (ibm->write)
2976                         entry->write_proc = &dispatch_procfs_write;
2977                 ibm->flags.proc_created = 1;
2978         }
2979
2980         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
2981
2982         return 0;
2983
2984 err_out:
2985         dbg_printk(TPACPI_DBG_INIT,
2986                 "%s: at error exit path with result %d\n",
2987                 ibm->name, ret);
2988
2989         ibm_exit(ibm);
2990         return (ret < 0)? ret : 0;
2991 }
2992
2993 static void ibm_exit(struct ibm_struct *ibm)
2994 {
2995         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
2996
2997         list_del_init(&ibm->all_drivers);
2998
2999         if (ibm->flags.acpi_notify_installed) {
3000                 dbg_printk(TPACPI_DBG_EXIT,
3001                         "%s: acpi_remove_notify_handler\n", ibm->name);
3002                 BUG_ON(!ibm->acpi);
3003                 acpi_remove_notify_handler(*ibm->acpi->handle,
3004                                            ibm->acpi->type,
3005                                            dispatch_acpi_notify);
3006                 ibm->flags.acpi_notify_installed = 0;
3007                 ibm->flags.acpi_notify_installed = 0;
3008         }
3009
3010         if (ibm->flags.proc_created) {
3011                 dbg_printk(TPACPI_DBG_EXIT,
3012                         "%s: remove_proc_entry\n", ibm->name);
3013                 remove_proc_entry(ibm->name, proc_dir);
3014                 ibm->flags.proc_created = 0;
3015         }
3016
3017         if (ibm->flags.acpi_driver_registered) {
3018                 dbg_printk(TPACPI_DBG_EXIT,
3019                         "%s: acpi_bus_unregister_driver\n", ibm->name);
3020                 BUG_ON(!ibm->acpi);
3021                 acpi_bus_unregister_driver(ibm->acpi->driver);
3022                 kfree(ibm->acpi->driver);
3023                 ibm->acpi->driver = NULL;
3024                 ibm->flags.acpi_driver_registered = 0;
3025         }
3026
3027         if (ibm->flags.init_called && ibm->exit) {
3028                 ibm->exit();
3029                 ibm->flags.init_called = 0;
3030         }
3031
3032         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3033 }
3034
3035 /* Probing */
3036
3037 static char *ibm_thinkpad_ec_found = NULL;
3038
3039 static char* __init check_dmi_for_ec(void)
3040 {
3041         struct dmi_device *dev = NULL;
3042         char ec_fw_string[18];
3043
3044         /*
3045          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3046          * X32 or newer, all Z series;  Some models must have an
3047          * up-to-date BIOS or they will not be detected.
3048          *
3049          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3050          */
3051         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3052                 if (sscanf(dev->name,
3053                            "IBM ThinkPad Embedded Controller -[%17c",
3054                            ec_fw_string) == 1) {
3055                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3056                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3057                         return kstrdup(ec_fw_string, GFP_KERNEL);
3058                 }
3059         }
3060         return NULL;
3061 }
3062
3063 static int __init probe_for_thinkpad(void)
3064 {
3065         int is_thinkpad;
3066
3067         if (acpi_disabled)
3068                 return -ENODEV;
3069
3070         /*
3071          * Non-ancient models have better DMI tagging, but very old models
3072          * don't.
3073          */
3074         is_thinkpad = dmi_name_in_vendors("ThinkPad");
3075
3076         /* ec is required because many other handles are relative to it */
3077         IBM_ACPIHANDLE_INIT(ec);
3078         if (!ec_handle) {
3079                 if (is_thinkpad)
3080                         printk(IBM_ERR
3081                                 "Not yet supported ThinkPad detected!\n");
3082                 return -ENODEV;
3083         }
3084
3085         /*
3086          * Risks a regression on very old machines, but reduces potential
3087          * false positives a damn great deal
3088          */
3089         if (!is_thinkpad)
3090                 is_thinkpad = dmi_name_in_vendors("IBM");
3091
3092         if (!is_thinkpad && !force_load)
3093                 return -ENODEV;
3094
3095         return 0;
3096 }
3097
3098
3099 /* Module init, exit, parameters */
3100
3101 static struct ibm_init_struct ibms_init[] __initdata = {
3102         {
3103                 .init = thinkpad_acpi_driver_init,
3104                 .data = &thinkpad_acpi_driver_data,
3105         },
3106         {
3107                 .init = hotkey_init,
3108                 .data = &hotkey_driver_data,
3109         },
3110         {
3111                 .init = bluetooth_init,
3112                 .data = &bluetooth_driver_data,
3113         },
3114         {
3115                 .init = wan_init,
3116                 .data = &wan_driver_data,
3117         },
3118         {
3119                 .init = video_init,
3120                 .data = &video_driver_data,
3121         },
3122         {
3123                 .init = light_init,
3124                 .data = &light_driver_data,
3125         },
3126 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3127         {
3128                 .init = dock_init,
3129                 .data = &dock_driver_data[0],
3130         },
3131         {
3132                 .data = &dock_driver_data[1],
3133         },
3134 #endif
3135 #ifdef CONFIG_THINKPAD_ACPI_BAY
3136         {
3137                 .init = bay_init,
3138                 .data = &bay_driver_data,
3139         },
3140 #endif
3141         {
3142                 .init = cmos_init,
3143                 .data = &cmos_driver_data,
3144         },
3145         {
3146                 .init = led_init,
3147                 .data = &led_driver_data,
3148         },
3149         {
3150                 .init = beep_init,
3151                 .data = &beep_driver_data,
3152         },
3153         {
3154                 .init = thermal_init,
3155                 .data = &thermal_driver_data,
3156         },
3157         {
3158                 .data = &ecdump_driver_data,
3159         },
3160         {
3161                 .init = brightness_init,
3162                 .data = &brightness_driver_data,
3163         },
3164         {
3165                 .data = &volume_driver_data,
3166         },
3167         {
3168                 .init = fan_init,
3169                 .data = &fan_driver_data,
3170         },
3171 };
3172
3173 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3174 {
3175         unsigned int i;
3176         struct ibm_struct *ibm;
3177
3178         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3179                 ibm = ibms_init[i].data;
3180                 BUG_ON(ibm == NULL);
3181
3182                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3183                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3184                                 return -ENOSPC;
3185                         strcpy(ibms_init[i].param, val);
3186                         strcat(ibms_init[i].param, ",");
3187                         return 0;
3188                 }
3189         }
3190
3191         return -EINVAL;
3192 }
3193
3194 static int experimental;
3195 module_param(experimental, int, 0);
3196
3197 static u32 dbg_level;
3198 module_param_named(debug, dbg_level, uint, 0);
3199
3200 static int force_load;
3201 module_param(force_load, int, 0);
3202
3203 #define IBM_PARAM(feature) \
3204         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3205
3206 IBM_PARAM(hotkey);
3207 IBM_PARAM(bluetooth);
3208 IBM_PARAM(video);
3209 IBM_PARAM(light);
3210 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3211 IBM_PARAM(dock);
3212 #endif
3213 #ifdef CONFIG_THINKPAD_ACPI_BAY
3214 IBM_PARAM(bay);
3215 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3216 IBM_PARAM(cmos);
3217 IBM_PARAM(led);
3218 IBM_PARAM(beep);
3219 IBM_PARAM(ecdump);
3220 IBM_PARAM(brightness);
3221 IBM_PARAM(volume);
3222 IBM_PARAM(fan);
3223
3224 static int __init thinkpad_acpi_module_init(void)
3225 {
3226         int ret, i;
3227
3228         ret = probe_for_thinkpad();
3229         if (ret)
3230                 return ret;
3231
3232         ibm_thinkpad_ec_found = check_dmi_for_ec();
3233         IBM_ACPIHANDLE_INIT(ecrd);
3234         IBM_ACPIHANDLE_INIT(ecwr);
3235
3236         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3237         if (!proc_dir) {
3238                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3239                 thinkpad_acpi_module_exit();
3240                 return -ENODEV;
3241         }
3242         proc_dir->owner = THIS_MODULE;
3243
3244         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3245                 ret = ibm_init(&ibms_init[i]);
3246                 if (ret >= 0 && *ibms_init[i].param)
3247                         ret = ibms_init[i].data->write(ibms_init[i].param);
3248                 if (ret < 0) {
3249                         thinkpad_acpi_module_exit();
3250                         return ret;
3251                 }
3252         }
3253
3254         return 0;
3255 }
3256
3257 static void thinkpad_acpi_module_exit(void)
3258 {
3259         struct ibm_struct *ibm, *itmp;
3260
3261         list_for_each_entry_safe_reverse(ibm, itmp,
3262                                          &tpacpi_all_drivers,
3263                                          all_drivers) {
3264                 ibm_exit(ibm);
3265         }
3266
3267         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
3268
3269         if (proc_dir)
3270                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
3271
3272         kfree(ibm_thinkpad_ec_found);
3273 }
3274
3275 module_init(thinkpad_acpi_module_init);
3276 module_exit(thinkpad_acpi_module_exit);