git.oblomov.eu Git - linux-2.6/blob - 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 "0.15"
  25 #define TPACPI_SYSFS_VERSION 0x010000
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 #include "thinkpad_acpi.h"
  86
  87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  88 MODULE_DESCRIPTION(IBM_DESC);
  89 MODULE_VERSION(IBM_VERSION);
  90 MODULE_LICENSE("GPL");
  91
  92 /* Please remove this in year 2009 */
  93 MODULE_ALIAS("ibm_acpi");
  94
  95 /*
  96  * DMI matching for module autoloading
  97  *
  98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
  99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 100  *
 101  * Only models listed in thinkwiki will be supported, so add yours
 102  * if it is not there yet.
 103  */
 104 #define IBM_BIOS_MODULE_ALIAS(__type) \
 105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 106
 107 /* Non-ancient thinkpads */
 108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 110
 111 /* Ancient thinkpad BIOSes have to be identified by
 112  * BIOS type or model number, and there are far less
 113  * BIOS types than model numbers... */
 114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 /****************************************************************************
 121  ****************************************************************************
 122  *
 123  * ACPI Helpers and device model
 124  *
 125  ****************************************************************************
 126  ****************************************************************************/
 127
 128 /*************************************************************************
 129  * ACPI basic handles
 130  */
 131
 132 static acpi_handle root_handle;
 133
 134 #define IBM_HANDLE(object, parent, paths...)                    \
 135         static acpi_handle  object##_handle;                    \
 136         static acpi_handle *object##_parent = &parent##_handle; \
 137         static char        *object##_path;                      \
 138         static char        *object##_paths[] = { paths }
 139
 140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 141            "\\_SB.PCI.ISA.EC",  /* 570 */
 142            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 143            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 144            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 145            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 146            "\\_SB.PCI0.LPC.EC", /* all others */
 147            );
 148
 149 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 150 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 151
 152
 153 /*************************************************************************
 154  * Misc ACPI handles
 155  */
 156
 157 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 158            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 159            "\\CMS",             /* R40, R40e */
 160            );                   /* all others */
 161
 162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 163            "^HKEY",             /* R30, R31 */
 164            "HKEY",              /* all others */
 165            );                   /* 570 */
 166
 167
 168 /*************************************************************************
 169  * ACPI helpers
 170  */
 171
 172 static int acpi_evalf(acpi_handle handle,
 173                       void *res, char *method, char *fmt, ...)
 174 {
 175         char *fmt0 = fmt;
 176         struct acpi_object_list params;
 177         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 178         struct acpi_buffer result, *resultp;
 179         union acpi_object out_obj;
 180         acpi_status status;
 181         va_list ap;
 182         char res_type;
 183         int success;
 184         int quiet;
 185
 186         if (!*fmt) {
 187                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 188                 return 0;
 189         }
 190
 191         if (*fmt == 'q') {
 192                 quiet = 1;
 193                 fmt++;
 194         } else
 195                 quiet = 0;
 196
 197         res_type = *(fmt++);
 198
 199         params.count = 0;
 200         params.pointer = &in_objs[0];
 201
 202         va_start(ap, fmt);
 203         while (*fmt) {
 204                 char c = *(fmt++);
 205                 switch (c) {
 206                 case 'd':       /* int */
 207                         in_objs[params.count].integer.value = va_arg(ap, int);
 208                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 209                         break;
 210                         /* add more types as needed */
 211                 default:
 212                         printk(IBM_ERR "acpi_evalf() called "
 213                                "with invalid format character '%c'\n", c);
 214                         return 0;
 215                 }
 216         }
 217         va_end(ap);
 218
 219         if (res_type != 'v') {
 220                 result.length = sizeof(out_obj);
 221                 result.pointer = &out_obj;
 222                 resultp = &result;
 223         } else
 224                 resultp = NULL;
 225
 226         status = acpi_evaluate_object(handle, method, &params, resultp);
 227
 228         switch (res_type) {
 229         case 'd':               /* int */
 230                 if (res)
 231                         *(int *)res = out_obj.integer.value;
 232                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 233                 break;
 234         case 'v':               /* void */
 235                 success = status == AE_OK;
 236                 break;
 237                 /* add more types as needed */
 238         default:
 239                 printk(IBM_ERR "acpi_evalf() called "
 240                        "with invalid format character '%c'\n", res_type);
 241                 return 0;
 242         }
 243
 244         if (!success && !quiet)
 245                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 246                        method, fmt0, status);
 247
 248         return success;
 249 }
 250
 251 static void __unused acpi_print_int(acpi_handle handle, char *method)
 252 {
 253         int i;
 254
 255         if (acpi_evalf(handle, &i, method, "d"))
 256                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 257         else
 258                 printk(IBM_ERR "error calling %s\n", method);
 259 }
 260
 261 static int acpi_ec_read(int i, u8 * p)
 262 {
 263         int v;
 264
 265         if (ecrd_handle) {
 266                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 267                         return 0;
 268                 *p = v;
 269         } else {
 270                 if (ec_read(i, p) < 0)
 271                         return 0;
 272         }
 273
 274         return 1;
 275 }
 276
 277 static int acpi_ec_write(int i, u8 v)
 278 {
 279         if (ecwr_handle) {
 280                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 281                         return 0;
 282         } else {
 283                 if (ec_write(i, v) < 0)
 284                         return 0;
 285         }
 286
 287         return 1;
 288 }
 289
 290 static int _sta(acpi_handle handle)
 291 {
 292         int status;
 293
 294         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 295                 status = 0;
 296
 297         return status;
 298 }
 299
 300 static int issue_thinkpad_cmos_command(int cmos_cmd)
 301 {
 302         if (!cmos_handle)
 303                 return -ENXIO;
 304
 305         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 306                 return -EIO;
 307
 308         return 0;
 309 }
 310
 311 /*************************************************************************
 312  * ACPI device model
 313  */
 314
 315 static void drv_acpi_handle_init(char *name,
 316                            acpi_handle *handle, acpi_handle parent,
 317                            char **paths, int num_paths, char **path)
 318 {
 319         int i;
 320         acpi_status status;
 321
 322         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 323                 name);
 324
 325         for (i = 0; i < num_paths; i++) {
 326                 status = acpi_get_handle(parent, paths[i], handle);
 327                 if (ACPI_SUCCESS(status)) {
 328                         *path = paths[i];
 329                         dbg_printk(TPACPI_DBG_INIT,
 330                                    "Found ACPI handle %s for %s\n",
 331                                    *path, name);
 332                         return;
 333                 }
 334         }
 335
 336         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 337                     name);
 338         *handle = NULL;
 339 }
 340
 341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 342 {
 343         struct ibm_struct *ibm = data;
 344
 345         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 346                 return;
 347
 348         ibm->acpi->notify(ibm, event);
 349 }
 350
 351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 352 {
 353         acpi_status status;
 354         int rc;
 355
 356         BUG_ON(!ibm->acpi);
 357
 358         if (!*ibm->acpi->handle)
 359                 return 0;
 360
 361         vdbg_printk(TPACPI_DBG_INIT,
 362                 "setting up ACPI notify for %s\n", ibm->name);
 363
 364         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 365         if (rc < 0) {
 366                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 367                         ibm->name, rc);
 368                 return -ENODEV;
 369         }
 370
 371         acpi_driver_data(ibm->acpi->device) = ibm;
 372         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 373                 IBM_ACPI_EVENT_PREFIX,
 374                 ibm->name);
 375
 376         status = acpi_install_notify_handler(*ibm->acpi->handle,
 377                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 378         if (ACPI_FAILURE(status)) {
 379                 if (status == AE_ALREADY_EXISTS) {
 380                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 381                                 ibm->name);
 382                 } else {
 383                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 384                                 ibm->name, status);
 385                 }
 386                 return -ENODEV;
 387         }
 388         ibm->flags.acpi_notify_installed = 1;
 389         return 0;
 390 }
 391
 392 static int __init tpacpi_device_add(struct acpi_device *device)
 393 {
 394         return 0;
 395 }
 396
 397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 398 {
 399         int rc;
 400
 401         dbg_printk(TPACPI_DBG_INIT,
 402                 "registering %s as an ACPI driver\n", ibm->name);
 403
 404         BUG_ON(!ibm->acpi);
 405
 406         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 407         if (!ibm->acpi->driver) {
 408                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 409                 return -ENOMEM;
 410         }
 411
 412         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 413         ibm->acpi->driver->ids = ibm->acpi->hid;
 414
 415         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 416
 417         rc = acpi_bus_register_driver(ibm->acpi->driver);
 418         if (rc < 0) {
 419                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 420                        ibm->name, rc);
 421                 kfree(ibm->acpi->driver);
 422                 ibm->acpi->driver = NULL;
 423         } else if (!rc)
 424                 ibm->flags.acpi_driver_registered = 1;
 425
 426         return rc;
 427 }
 428
 429
 430 /****************************************************************************
 431  ****************************************************************************
 432  *
 433  * Procfs Helpers
 434  *
 435  ****************************************************************************
 436  ****************************************************************************/
 437
 438 static int dispatch_procfs_read(char *page, char **start, off_t off,
 439                         int count, int *eof, void *data)
 440 {
 441         struct ibm_struct *ibm = data;
 442         int len;
 443
 444         if (!ibm || !ibm->read)
 445                 return -EINVAL;
 446
 447         len = ibm->read(page);
 448         if (len < 0)
 449                 return len;
 450
 451         if (len <= off + count)
 452                 *eof = 1;
 453         *start = page + off;
 454         len -= off;
 455         if (len > count)
 456                 len = count;
 457         if (len < 0)
 458                 len = 0;
 459
 460         return len;
 461 }
 462
 463 static int dispatch_procfs_write(struct file *file,
 464                         const char __user * userbuf,
 465                         unsigned long count, void *data)
 466 {
 467         struct ibm_struct *ibm = data;
 468         char *kernbuf;
 469         int ret;
 470
 471         if (!ibm || !ibm->write)
 472                 return -EINVAL;
 473
 474         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 475         if (!kernbuf)
 476                 return -ENOMEM;
 477
 478         if (copy_from_user(kernbuf, userbuf, count)) {
 479                 kfree(kernbuf);
 480                 return -EFAULT;
 481         }
 482
 483         kernbuf[count] = 0;
 484         strcat(kernbuf, ",");
 485         ret = ibm->write(kernbuf);
 486         if (ret == 0)
 487                 ret = count;
 488
 489         kfree(kernbuf);
 490
 491         return ret;
 492 }
 493
 494 static char *next_cmd(char **cmds)
 495 {
 496         char *start = *cmds;
 497         char *end;
 498
 499         while ((end = strchr(start, ',')) && end == start)
 500                 start = end + 1;
 501
 502         if (!end)
 503                 return NULL;
 504
 505         *end = 0;
 506         *cmds = end + 1;
 507         return start;
 508 }
 509
 510
 511 /****************************************************************************
 512  ****************************************************************************
 513  *
 514  * Device model: input, hwmon and platform
 515  *
 516  ****************************************************************************
 517  ****************************************************************************/
 518
 519 static struct platform_device *tpacpi_pdev;
 520 static struct class_device *tpacpi_hwmon;
 521 static struct input_dev *tpacpi_inputdev;
 522
 523
 524 static int tpacpi_resume_handler(struct platform_device *pdev)
 525 {
 526         struct ibm_struct *ibm, *itmp;
 527
 528         list_for_each_entry_safe(ibm, itmp,
 529                                  &tpacpi_all_drivers,
 530                                  all_drivers) {
 531                 if (ibm->resume)
 532                         (ibm->resume)();
 533         }
 534
 535         return 0;
 536 }
 537
 538 static struct platform_driver tpacpi_pdriver = {
 539         .driver = {
 540                 .name = IBM_DRVR_NAME,
 541                 .owner = THIS_MODULE,
 542         },
 543         .resume = tpacpi_resume_handler,
 544 };
 545
 546
 547 /*************************************************************************
 548  * thinkpad-acpi driver attributes
 549  */
 550
 551 /* interface_version --------------------------------------------------- */
 552 static ssize_t tpacpi_driver_interface_version_show(
 553                                 struct device_driver *drv,
 554                                 char *buf)
 555 {
 556         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 557 }
 558
 559 static DRIVER_ATTR(interface_version, S_IRUGO,
 560                 tpacpi_driver_interface_version_show, NULL);
 561
 562 /* debug_level --------------------------------------------------------- */
 563 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 564                                                 char *buf)
 565 {
 566         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 567 }
 568
 569 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 570                                                 const char *buf, size_t count)
 571 {
 572         unsigned long t;
 573
 574         if (parse_strtoul(buf, 0xffff, &t))
 575                 return -EINVAL;
 576
 577         dbg_level = t;
 578
 579         return count;
 580 }
 581
 582 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 583                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 584
 585 /* version ------------------------------------------------------------- */
 586 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 587                                                 char *buf)
 588 {
 589         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 590 }
 591
 592 static DRIVER_ATTR(version, S_IRUGO,
 593                 tpacpi_driver_version_show, NULL);
 594
 595 /* --------------------------------------------------------------------- */
 596
 597 static struct driver_attribute* tpacpi_driver_attributes[] = {
 598         &driver_attr_debug_level, &driver_attr_version,
 599         &driver_attr_interface_version,
 600 };
 601
 602 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 603 {
 604         int i, res;
 605
 606         i = 0;
 607         res = 0;
 608         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 609                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 610                 i++;
 611         }
 612
 613         return res;
 614 }
 615
 616 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 617 {
 618         int i;
 619
 620         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 621                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 622 }
 623
 624 /*************************************************************************
 625  * sysfs support helpers
 626  */
 627
 628 struct attribute_set_obj {
 629         struct attribute_set s;
 630         struct attribute *a;
 631 } __attribute__((packed));
 632
 633 static struct attribute_set *create_attr_set(unsigned int max_members,
 634                                                 const char* name)
 635 {
 636         struct attribute_set_obj *sobj;
 637
 638         if (max_members == 0)
 639                 return NULL;
 640
 641         /* Allocates space for implicit NULL at the end too */
 642         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 643                     max_members * sizeof(struct attribute *),
 644                     GFP_KERNEL);
 645         if (!sobj)
 646                 return NULL;
 647         sobj->s.max_members = max_members;
 648         sobj->s.group.attrs = &sobj->a;
 649         sobj->s.group.name = name;
 650
 651         return &sobj->s;
 652 }
 653
 654 /* not multi-threaded safe, use it in a single thread per set */
 655 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 656 {
 657         if (!s || !attr)
 658                 return -EINVAL;
 659
 660         if (s->members >= s->max_members)
 661                 return -ENOMEM;
 662
 663         s->group.attrs[s->members] = attr;
 664         s->members++;
 665
 666         return 0;
 667 }
 668
 669 static int add_many_to_attr_set(struct attribute_set* s,
 670                         struct attribute **attr,
 671                         unsigned int count)
 672 {
 673         int i, res;
 674
 675         for (i = 0; i < count; i++) {
 676                 res = add_to_attr_set(s, attr[i]);
 677                 if (res)
 678                         return res;
 679         }
 680
 681         return 0;
 682 }
 683
 684 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 685 {
 686         sysfs_remove_group(kobj, &s->group);
 687         destroy_attr_set(s);
 688 }
 689
 690 static int parse_strtoul(const char *buf,
 691                 unsigned long max, unsigned long *value)
 692 {
 693         char *endp;
 694
 695         *value = simple_strtoul(buf, &endp, 0);
 696         while (*endp && isspace(*endp))
 697                 endp++;
 698         if (*endp || *value > max)
 699                 return -EINVAL;
 700
 701         return 0;
 702 }
 703
 704 /****************************************************************************
 705  ****************************************************************************
 706  *
 707  * Subdrivers
 708  *
 709  ****************************************************************************
 710  ****************************************************************************/
 711
 712 /*************************************************************************
 713  * thinkpad-acpi init subdriver
 714  */
 715
 716 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 717 {
 718         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 719         printk(IBM_INFO "%s\n", IBM_URL);
 720
 721         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
 722                 (thinkpad_id.bios_version_str) ?
 723                         thinkpad_id.bios_version_str : "unknown",
 724                 (thinkpad_id.ec_version_str) ?
 725                         thinkpad_id.ec_version_str : "unknown");
 726
 727         if (thinkpad_id.vendor && thinkpad_id.model_str)
 728                 printk(IBM_INFO "%s %s\n",
 729                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 730                                 "IBM" : ((thinkpad_id.vendor ==
 731                                                 PCI_VENDOR_ID_LENOVO) ?
 732                                         "Lenovo" : "Unknown vendor"),
 733                         thinkpad_id.model_str);
 734
 735         return 0;
 736 }
 737
 738 static int thinkpad_acpi_driver_read(char *p)
 739 {
 740         int len = 0;
 741
 742         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 743         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 744
 745         return len;
 746 }
 747
 748 static struct ibm_struct thinkpad_acpi_driver_data = {
 749         .name = "driver",
 750         .read = thinkpad_acpi_driver_read,
 751 };
 752
 753 /*************************************************************************
 754  * Hotkey subdriver
 755  */
 756
 757 static int hotkey_orig_status;
 758 static u32 hotkey_orig_mask;
 759 static u32 hotkey_all_mask;
 760 static u32 hotkey_reserved_mask;
 761
 762 static u16 *hotkey_keycode_map;
 763
 764 static struct attribute_set *hotkey_dev_attributes;
 765
 766 static int hotkey_get_wlsw(int *status)
 767 {
 768         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 769                 return -EIO;
 770         return 0;
 771 }
 772
 773 /* sysfs hotkey enable ------------------------------------------------- */
 774 static ssize_t hotkey_enable_show(struct device *dev,
 775                            struct device_attribute *attr,
 776                            char *buf)
 777 {
 778         int res, status;
 779         u32 mask;
 780
 781         res = hotkey_get(&status, &mask);
 782         if (res)
 783                 return res;
 784
 785         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 786 }
 787
 788 static ssize_t hotkey_enable_store(struct device *dev,
 789                             struct device_attribute *attr,
 790                             const char *buf, size_t count)
 791 {
 792         unsigned long t;
 793         int res, status;
 794         u32 mask;
 795
 796         if (parse_strtoul(buf, 1, &t))
 797                 return -EINVAL;
 798
 799         res = hotkey_get(&status, &mask);
 800         if (!res)
 801                 res = hotkey_set(t, mask);
 802
 803         return (res) ? res : count;
 804 }
 805
 806 static struct device_attribute dev_attr_hotkey_enable =
 807         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 808                 hotkey_enable_show, hotkey_enable_store);
 809
 810 /* sysfs hotkey mask --------------------------------------------------- */
 811 static ssize_t hotkey_mask_show(struct device *dev,
 812                            struct device_attribute *attr,
 813                            char *buf)
 814 {
 815         int res, status;
 816         u32 mask;
 817
 818         res = hotkey_get(&status, &mask);
 819         if (res)
 820                 return res;
 821
 822         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
 823 }
 824
 825 static ssize_t hotkey_mask_store(struct device *dev,
 826                             struct device_attribute *attr,
 827                             const char *buf, size_t count)
 828 {
 829         unsigned long t;
 830         int res, status;
 831         u32 mask;
 832
 833         if (parse_strtoul(buf, 0xffffffffUL, &t))
 834                 return -EINVAL;
 835
 836         res = hotkey_get(&status, &mask);
 837         if (!res)
 838                 hotkey_set(status, t);
 839
 840         return (res) ? res : count;
 841 }
 842
 843 static struct device_attribute dev_attr_hotkey_mask =
 844         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 845                 hotkey_mask_show, hotkey_mask_store);
 846
 847 /* sysfs hotkey bios_enabled ------------------------------------------- */
 848 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 849                            struct device_attribute *attr,
 850                            char *buf)
 851 {
 852         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 853 }
 854
 855 static struct device_attribute dev_attr_hotkey_bios_enabled =
 856         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 857
 858 /* sysfs hotkey bios_mask ---------------------------------------------- */
 859 static ssize_t hotkey_bios_mask_show(struct device *dev,
 860                            struct device_attribute *attr,
 861                            char *buf)
 862 {
 863         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 864 }
 865
 866 static struct device_attribute dev_attr_hotkey_bios_mask =
 867         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 868
 869 /* sysfs hotkey all_mask ----------------------------------------------- */
 870 static ssize_t hotkey_all_mask_show(struct device *dev,
 871                            struct device_attribute *attr,
 872                            char *buf)
 873 {
 874         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 875 }
 876
 877 static struct device_attribute dev_attr_hotkey_all_mask =
 878         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 879
 880 /* sysfs hotkey recommended_mask --------------------------------------- */
 881 static ssize_t hotkey_recommended_mask_show(struct device *dev,
 882                                             struct device_attribute *attr,
 883                                             char *buf)
 884 {
 885         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
 886                         hotkey_all_mask & ~hotkey_reserved_mask);
 887 }
 888
 889 static struct device_attribute dev_attr_hotkey_recommended_mask =
 890         __ATTR(hotkey_recommended_mask, S_IRUGO,
 891                 hotkey_recommended_mask_show, NULL);
 892
 893 /* sysfs hotkey radio_sw ----------------------------------------------- */
 894 static ssize_t hotkey_radio_sw_show(struct device *dev,
 895                            struct device_attribute *attr,
 896                            char *buf)
 897 {
 898         int res, s;
 899         res = hotkey_get_wlsw(&s);
 900         if (res < 0)
 901                 return res;
 902
 903         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
 904 }
 905
 906 static struct device_attribute dev_attr_hotkey_radio_sw =
 907         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
 908
 909 /* --------------------------------------------------------------------- */
 910
 911 static struct attribute *hotkey_mask_attributes[] = {
 912         &dev_attr_hotkey_mask.attr,
 913         &dev_attr_hotkey_bios_enabled.attr,
 914         &dev_attr_hotkey_bios_mask.attr,
 915         &dev_attr_hotkey_all_mask.attr,
 916         &dev_attr_hotkey_recommended_mask.attr,
 917 };
 918
 919 static int __init hotkey_init(struct ibm_init_struct *iibm)
 920 {
 921
 922         static u16 ibm_keycode_map[] __initdata = {
 923                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 924                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
 925                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 926                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 927                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 928                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 929                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 930                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 931                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
 932                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 933                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
 934                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 935                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 936                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 937                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 938                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 939                 KEY_RESERVED,   /* 0x16: MUTE */
 940                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
 941                 /* (assignments unknown, please report if found) */
 942                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 943                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 944         };
 945         static u16 lenovo_keycode_map[] __initdata = {
 946                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 947                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
 948                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 949                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 950                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 951                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 952                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 953                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 954                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
 955                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 956                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
 957                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 958                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 959                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 960                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 961                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 962                 KEY_RESERVED,   /* 0x16: MUTE */
 963                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
 964                 /* (assignments unknown, please report if found) */
 965                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 966                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 967         };
 968
 969 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
 970 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
 971 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
 972
 973         int res, i;
 974         int status;
 975
 976         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 977
 978         BUG_ON(!tpacpi_inputdev);
 979
 980         IBM_ACPIHANDLE_INIT(hkey);
 981         mutex_init(&hotkey_mutex);
 982
 983         /* hotkey not supported on 570 */
 984         tp_features.hotkey = hkey_handle != NULL;
 985
 986         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 987                 str_supported(tp_features.hotkey));
 988
 989         if (tp_features.hotkey) {
 990                 hotkey_dev_attributes = create_attr_set(7, NULL);
 991                 if (!hotkey_dev_attributes)
 992                         return -ENOMEM;
 993                 res = add_to_attr_set(hotkey_dev_attributes,
 994                                 &dev_attr_hotkey_enable.attr);
 995                 if (res)
 996                         return res;
 997
 998                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 999                    A30, R30, R31, T20-22, X20-21, X22-24 */
1000                 tp_features.hotkey_mask =
1001                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
1002
1003                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1004                         str_supported(tp_features.hotkey_mask));
1005
1006                 if (tp_features.hotkey_mask) {
1007                         /* MHKA available in A31, R40, R40e, T4x, X31, and later */
1008                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1009                                         "MHKA", "qd"))
1010                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1011                 }
1012
1013                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1014                 if (!res && tp_features.hotkey_mask) {
1015                         res = add_many_to_attr_set(hotkey_dev_attributes,
1016                                 hotkey_mask_attributes,
1017                                 ARRAY_SIZE(hotkey_mask_attributes));
1018                 }
1019
1020                 /* Not all thinkpads have a hardware radio switch */
1021                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1022                         tp_features.hotkey_wlsw = 1;
1023                         printk(IBM_INFO
1024                                 "radio switch found; radios are %s\n",
1025                                 enabled(status, 0));
1026                         res = add_to_attr_set(hotkey_dev_attributes,
1027                                         &dev_attr_hotkey_radio_sw.attr);
1028                 }
1029
1030                 if (!res)
1031                         res = register_attr_set_with_sysfs(
1032                                         hotkey_dev_attributes,
1033                                         &tpacpi_pdev->dev.kobj);
1034                 if (res)
1035                         return res;
1036
1037                 /* Set up key map */
1038
1039                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1040                                                 GFP_KERNEL);
1041                 if (!hotkey_keycode_map) {
1042                         printk(IBM_ERR "failed to allocate memory for key map\n");
1043                         return -ENOMEM;
1044                 }
1045
1046                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1047                         dbg_printk(TPACPI_DBG_INIT,
1048                                    "using Lenovo default hot key map\n");
1049                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1050                                 TPACPI_HOTKEY_MAP_SIZE);
1051                 } else {
1052                         dbg_printk(TPACPI_DBG_INIT,
1053                                    "using IBM default hot key map\n");
1054                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1055                                 TPACPI_HOTKEY_MAP_SIZE);
1056                 }
1057
1058 #ifndef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1059                 for (i = 0; i < 12; i++)
1060                         hotkey_keycode_map[i] = KEY_UNKNOWN;
1061 #endif /* ! CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1062
1063                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1064                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1065                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1066                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1067                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1068                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1069                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1070                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1071                                 set_bit(hotkey_keycode_map[i],
1072                                         tpacpi_inputdev->keybit);
1073                         } else {
1074                                 if (i < sizeof(hotkey_reserved_mask)*8)
1075                                         hotkey_reserved_mask |= 1 << i;
1076                         }
1077                 }
1078
1079                 if (tp_features.hotkey_wlsw) {
1080                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1081                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1082                 }
1083
1084 #ifdef CONFIG_THINKPAD_ACPI_INPUT_ENABLED
1085                 dbg_printk(TPACPI_DBG_INIT,
1086                                 "enabling hot key handling\n");
1087                 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1088                                         | hotkey_orig_mask);
1089                 if (res)
1090                         return res;
1091 #endif /* CONFIG_THINKPAD_ACPI_INPUT_ENABLED */
1092         }
1093
1094         return (tp_features.hotkey)? 0 : 1;
1095 }
1096
1097 static void hotkey_exit(void)
1098 {
1099         int res;
1100
1101         if (tp_features.hotkey) {
1102                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1103                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1104                 if (res)
1105                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1106         }
1107
1108         if (hotkey_dev_attributes) {
1109                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1110                 hotkey_dev_attributes = NULL;
1111         }
1112 }
1113
1114 static void tpacpi_input_send_key(unsigned int scancode,
1115                                   unsigned int keycode)
1116 {
1117         if (keycode != KEY_RESERVED) {
1118                 input_report_key(tpacpi_inputdev, keycode, 1);
1119                 if (keycode == KEY_UNKNOWN)
1120                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1121                                     scancode);
1122                 input_sync(tpacpi_inputdev);
1123
1124                 input_report_key(tpacpi_inputdev, keycode, 0);
1125                 if (keycode == KEY_UNKNOWN)
1126                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1127                                     scancode);
1128                 input_sync(tpacpi_inputdev);
1129         }
1130 }
1131
1132 static void tpacpi_input_send_radiosw(void)
1133 {
1134         int wlsw;
1135
1136         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
1137                 input_report_switch(tpacpi_inputdev,
1138                                     SW_RADIO, !!wlsw);
1139 }
1140
1141 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1142 {
1143         u32 hkey;
1144         unsigned int keycode, scancode;
1145         int sendacpi = 1;
1146
1147         if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1148                 if (tpacpi_inputdev->users > 0) {
1149                         switch (hkey >> 12) {
1150                         case 1:
1151                                 /* 0x1000-0x1FFF: key presses */
1152                                 scancode = hkey & 0xfff;
1153                                 if (scancode > 0 && scancode < 0x21) {
1154                                         scancode--;
1155                                         keycode = hotkey_keycode_map[scancode];
1156                                         tpacpi_input_send_key(scancode, keycode);
1157                                         sendacpi = (keycode == KEY_RESERVED
1158                                                 || keycode == KEY_UNKNOWN);
1159                                 } else {
1160                                         printk(IBM_ERR
1161                                                "hotkey 0x%04x out of range for keyboard map\n",
1162                                                hkey);
1163                                 }
1164                                 break;
1165                         case 5:
1166                                 /* 0x5000-0x5FFF: LID */
1167                                 /* we don't handle it through this path, just
1168                                  * eat up known LID events */
1169                                 if (hkey != 0x5001 && hkey != 0x5002) {
1170                                         printk(IBM_ERR
1171                                                 "unknown LID-related hotkey event: 0x%04x\n",
1172                                                 hkey);
1173                                 }
1174                                 break;
1175                         case 7:
1176                                 /* 0x7000-0x7FFF: misc */
1177                                 if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1178                                                 tpacpi_input_send_radiosw();
1179                                                 sendacpi = 0;
1180                                         break;
1181                                 }
1182                                 /* fallthrough to default */
1183                         default:
1184                                 /* case 2: dock-related */
1185                                 /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1186                                 /* case 3: ultra-bay related. maybe bay in dock? */
1187                                 /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1188                                 printk(IBM_NOTICE "unhandled hotkey event 0x%04x\n", hkey);
1189                         }
1190                 }
1191
1192                 if (sendacpi)
1193                         acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1194         } else {
1195                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
1196                 acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
1197         }
1198 }
1199
1200 static void hotkey_resume(void)
1201 {
1202         tpacpi_input_send_radiosw();
1203 }
1204
1205 /*
1206  * Call with hotkey_mutex held
1207  */
1208 static int hotkey_get(int *status, u32 *mask)
1209 {
1210         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1211                 return -EIO;
1212
1213         if (tp_features.hotkey_mask)
1214                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1215                         return -EIO;
1216
1217         return 0;
1218 }
1219
1220 /*
1221  * Call with hotkey_mutex held
1222  */
1223 static int hotkey_set(int status, u32 mask)
1224 {
1225         int i;
1226
1227         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1228                 return -EIO;
1229
1230         if (tp_features.hotkey_mask)
1231                 for (i = 0; i < 32; i++) {
1232                         int bit = ((1 << i) & mask) != 0;
1233                         if (!acpi_evalf(hkey_handle,
1234                                         NULL, "MHKM", "vdd", i + 1, bit))
1235                                 return -EIO;
1236                 }
1237
1238         return 0;
1239 }
1240
1241 /* procfs -------------------------------------------------------------- */
1242 static int hotkey_read(char *p)
1243 {
1244         int res, status;
1245         u32 mask;
1246         int len = 0;
1247
1248         if (!tp_features.hotkey) {
1249                 len += sprintf(p + len, "status:\t\tnot supported\n");
1250                 return len;
1251         }
1252
1253         res = mutex_lock_interruptible(&hotkey_mutex);
1254         if (res < 0)
1255                 return res;
1256         res = hotkey_get(&status, &mask);
1257         mutex_unlock(&hotkey_mutex);
1258         if (res)
1259                 return res;
1260
1261         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1262         if (tp_features.hotkey_mask) {
1263                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1264                 len += sprintf(p + len,
1265                                "commands:\tenable, disable, reset, <mask>\n");
1266         } else {
1267                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1268                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1269         }
1270
1271         return len;
1272 }
1273
1274 static int hotkey_write(char *buf)
1275 {
1276         int res, status;
1277         u32 mask;
1278         char *cmd;
1279         int do_cmd = 0;
1280
1281         if (!tp_features.hotkey)
1282                 return -ENODEV;
1283
1284         res = mutex_lock_interruptible(&hotkey_mutex);
1285         if (res < 0)
1286                 return res;
1287
1288         res = hotkey_get(&status, &mask);
1289         if (res)
1290                 goto errexit;
1291
1292         res = 0;
1293         while ((cmd = next_cmd(&buf))) {
1294                 if (strlencmp(cmd, "enable") == 0) {
1295                         status = 1;
1296                 } else if (strlencmp(cmd, "disable") == 0) {
1297                         status = 0;
1298                 } else if (strlencmp(cmd, "reset") == 0) {
1299                         status = hotkey_orig_status;
1300                         mask = hotkey_orig_mask;
1301                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1302                         /* mask set */
1303                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1304                         /* mask set */
1305                 } else {
1306                         res = -EINVAL;
1307                         goto errexit;
1308                 }
1309                 do_cmd = 1;
1310         }
1311
1312         if (do_cmd)
1313                 res = hotkey_set(status, mask);
1314
1315 errexit:
1316         mutex_unlock(&hotkey_mutex);
1317         return res;
1318 }
1319
1320 static const struct acpi_device_id ibm_htk_device_ids[] = {
1321         {IBM_HKEY_HID, 0},
1322         {"", 0},
1323 };
1324
1325 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1326         .hid = ibm_htk_device_ids,
1327         .notify = hotkey_notify,
1328         .handle = &hkey_handle,
1329         .type = ACPI_DEVICE_NOTIFY,
1330 };
1331
1332 static struct ibm_struct hotkey_driver_data = {
1333         .name = "hotkey",
1334         .read = hotkey_read,
1335         .write = hotkey_write,
1336         .exit = hotkey_exit,
1337         .resume = hotkey_resume,
1338         .acpi = &ibm_hotkey_acpidriver,
1339 };
1340
1341 /*************************************************************************
1342  * Bluetooth subdriver
1343  */
1344
1345 /* sysfs bluetooth enable ---------------------------------------------- */
1346 static ssize_t bluetooth_enable_show(struct device *dev,
1347                            struct device_attribute *attr,
1348                            char *buf)
1349 {
1350         int status;
1351
1352         status = bluetooth_get_radiosw();
1353         if (status < 0)
1354                 return status;
1355
1356         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1357 }
1358
1359 static ssize_t bluetooth_enable_store(struct device *dev,
1360                             struct device_attribute *attr,
1361                             const char *buf, size_t count)
1362 {
1363         unsigned long t;
1364         int res;
1365
1366         if (parse_strtoul(buf, 1, &t))
1367                 return -EINVAL;
1368
1369         res = bluetooth_set_radiosw(t);
1370
1371         return (res) ? res : count;
1372 }
1373
1374 static struct device_attribute dev_attr_bluetooth_enable =
1375         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1376                 bluetooth_enable_show, bluetooth_enable_store);
1377
1378 /* --------------------------------------------------------------------- */
1379
1380 static struct attribute *bluetooth_attributes[] = {
1381         &dev_attr_bluetooth_enable.attr,
1382         NULL
1383 };
1384
1385 static const struct attribute_group bluetooth_attr_group = {
1386         .attrs = bluetooth_attributes,
1387 };
1388
1389 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1390 {
1391         int res;
1392         int status = 0;
1393
1394         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1395
1396         IBM_ACPIHANDLE_INIT(hkey);
1397
1398         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1399            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1400         tp_features.bluetooth = hkey_handle &&
1401             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1402
1403         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1404                 str_supported(tp_features.bluetooth),
1405                 status);
1406
1407         if (tp_features.bluetooth) {
1408                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1409                         /* no bluetooth hardware present in system */
1410                         tp_features.bluetooth = 0;
1411                         dbg_printk(TPACPI_DBG_INIT,
1412                                    "bluetooth hardware not installed\n");
1413                 } else {
1414                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1415                                         &bluetooth_attr_group);
1416                         if (res)
1417                                 return res;
1418                 }
1419         }
1420
1421         return (tp_features.bluetooth)? 0 : 1;
1422 }
1423
1424 static void bluetooth_exit(void)
1425 {
1426         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1427                         &bluetooth_attr_group);
1428 }
1429
1430 static int bluetooth_get_radiosw(void)
1431 {
1432         int status;
1433
1434         if (!tp_features.bluetooth)
1435                 return -ENODEV;
1436
1437         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1438                 return -EIO;
1439
1440         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1441 }
1442
1443 static int bluetooth_set_radiosw(int radio_on)
1444 {
1445         int status;
1446
1447         if (!tp_features.bluetooth)
1448                 return -ENODEV;
1449
1450         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1451                 return -EIO;
1452         if (radio_on)
1453                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1454         else
1455                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1456         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1457                 return -EIO;
1458
1459         return 0;
1460 }
1461
1462 /* procfs -------------------------------------------------------------- */
1463 static int bluetooth_read(char *p)
1464 {
1465         int len = 0;
1466         int status = bluetooth_get_radiosw();
1467
1468         if (!tp_features.bluetooth)
1469                 len += sprintf(p + len, "status:\t\tnot supported\n");
1470         else {
1471                 len += sprintf(p + len, "status:\t\t%s\n",
1472                                 (status)? "enabled" : "disabled");
1473                 len += sprintf(p + len, "commands:\tenable, disable\n");
1474         }
1475
1476         return len;
1477 }
1478
1479 static int bluetooth_write(char *buf)
1480 {
1481         char *cmd;
1482
1483         if (!tp_features.bluetooth)
1484                 return -ENODEV;
1485
1486         while ((cmd = next_cmd(&buf))) {
1487                 if (strlencmp(cmd, "enable") == 0) {
1488                         bluetooth_set_radiosw(1);
1489                 } else if (strlencmp(cmd, "disable") == 0) {
1490                         bluetooth_set_radiosw(0);
1491                 } else
1492                         return -EINVAL;
1493         }
1494
1495         return 0;
1496 }
1497
1498 static struct ibm_struct bluetooth_driver_data = {
1499         .name = "bluetooth",
1500         .read = bluetooth_read,
1501         .write = bluetooth_write,
1502         .exit = bluetooth_exit,
1503 };
1504
1505 /*************************************************************************
1506  * Wan subdriver
1507  */
1508
1509 /* sysfs wan enable ---------------------------------------------------- */
1510 static ssize_t wan_enable_show(struct device *dev,
1511                            struct device_attribute *attr,
1512                            char *buf)
1513 {
1514         int status;
1515
1516         status = wan_get_radiosw();
1517         if (status < 0)
1518                 return status;
1519
1520         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1521 }
1522
1523 static ssize_t wan_enable_store(struct device *dev,
1524                             struct device_attribute *attr,
1525                             const char *buf, size_t count)
1526 {
1527         unsigned long t;
1528         int res;
1529
1530         if (parse_strtoul(buf, 1, &t))
1531                 return -EINVAL;
1532
1533         res = wan_set_radiosw(t);
1534
1535         return (res) ? res : count;
1536 }
1537
1538 static struct device_attribute dev_attr_wan_enable =
1539         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1540                 wan_enable_show, wan_enable_store);
1541
1542 /* --------------------------------------------------------------------- */
1543
1544 static struct attribute *wan_attributes[] = {
1545         &dev_attr_wan_enable.attr,
1546         NULL
1547 };
1548
1549 static const struct attribute_group wan_attr_group = {
1550         .attrs = wan_attributes,
1551 };
1552
1553 static int __init wan_init(struct ibm_init_struct *iibm)
1554 {
1555         int res;
1556         int status = 0;
1557
1558         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1559
1560         IBM_ACPIHANDLE_INIT(hkey);
1561
1562         tp_features.wan = hkey_handle &&
1563             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1564
1565         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1566                 str_supported(tp_features.wan),
1567                 status);
1568
1569         if (tp_features.wan) {
1570                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1571                         /* no wan hardware present in system */
1572                         tp_features.wan = 0;
1573                         dbg_printk(TPACPI_DBG_INIT,
1574                                    "wan hardware not installed\n");
1575                 } else {
1576                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1577                                         &wan_attr_group);
1578                         if (res)
1579                                 return res;
1580                 }
1581         }
1582
1583         return (tp_features.wan)? 0 : 1;
1584 }
1585
1586 static void wan_exit(void)
1587 {
1588         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1589                 &wan_attr_group);
1590 }
1591
1592 static int wan_get_radiosw(void)
1593 {
1594         int status;
1595
1596         if (!tp_features.wan)
1597                 return -ENODEV;
1598
1599         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1600                 return -EIO;
1601
1602         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1603 }
1604
1605 static int wan_set_radiosw(int radio_on)
1606 {
1607         int status;
1608
1609         if (!tp_features.wan)
1610                 return -ENODEV;
1611
1612         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1613                 return -EIO;
1614         if (radio_on)
1615                 status |= TP_ACPI_WANCARD_RADIOSSW;
1616         else
1617                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1618         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1619                 return -EIO;
1620
1621         return 0;
1622 }
1623
1624 /* procfs -------------------------------------------------------------- */
1625 static int wan_read(char *p)
1626 {
1627         int len = 0;
1628         int status = wan_get_radiosw();
1629
1630         if (!tp_features.wan)
1631                 len += sprintf(p + len, "status:\t\tnot supported\n");
1632         else {
1633                 len += sprintf(p + len, "status:\t\t%s\n",
1634                                 (status)? "enabled" : "disabled");
1635                 len += sprintf(p + len, "commands:\tenable, disable\n");
1636         }
1637
1638         return len;
1639 }
1640
1641 static int wan_write(char *buf)
1642 {
1643         char *cmd;
1644
1645         if (!tp_features.wan)
1646                 return -ENODEV;
1647
1648         while ((cmd = next_cmd(&buf))) {
1649                 if (strlencmp(cmd, "enable") == 0) {
1650                         wan_set_radiosw(1);
1651                 } else if (strlencmp(cmd, "disable") == 0) {
1652                         wan_set_radiosw(0);
1653                 } else
1654                         return -EINVAL;
1655         }
1656
1657         return 0;
1658 }
1659
1660 static struct ibm_struct wan_driver_data = {
1661         .name = "wan",
1662         .read = wan_read,
1663         .write = wan_write,
1664         .exit = wan_exit,
1665         .flags.experimental = 1,
1666 };
1667
1668 /*************************************************************************
1669  * Video subdriver
1670  */
1671
1672 static enum video_access_mode video_supported;
1673 static int video_orig_autosw;
1674
1675 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1676            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1677            "\\_SB.PCI0.VID0",   /* 770e */
1678            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1679            "\\_SB.PCI0.AGP.VID",        /* all others */
1680            );                           /* R30, R31 */
1681
1682 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1683
1684 static int __init video_init(struct ibm_init_struct *iibm)
1685 {
1686         int ivga;
1687
1688         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1689
1690         IBM_ACPIHANDLE_INIT(vid);
1691         IBM_ACPIHANDLE_INIT(vid2);
1692
1693         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1694                 /* G41, assume IVGA doesn't change */
1695                 vid_handle = vid2_handle;
1696
1697         if (!vid_handle)
1698                 /* video switching not supported on R30, R31 */
1699                 video_supported = TPACPI_VIDEO_NONE;
1700         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1701                 /* 570 */
1702                 video_supported = TPACPI_VIDEO_570;
1703         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1704                 /* 600e/x, 770e, 770x */
1705                 video_supported = TPACPI_VIDEO_770;
1706         else
1707                 /* all others */
1708                 video_supported = TPACPI_VIDEO_NEW;
1709
1710         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1711                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1712                 video_supported);
1713
1714         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1715 }
1716
1717 static void video_exit(void)
1718 {
1719         dbg_printk(TPACPI_DBG_EXIT,
1720                    "restoring original video autoswitch mode\n");
1721         if (video_autosw_set(video_orig_autosw))
1722                 printk(IBM_ERR "error while trying to restore original "
1723                         "video autoswitch mode\n");
1724 }
1725
1726 static int video_outputsw_get(void)
1727 {
1728         int status = 0;
1729         int i;
1730
1731         switch (video_supported) {
1732         case TPACPI_VIDEO_570:
1733                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1734                                  TP_ACPI_VIDEO_570_PHSCMD))
1735                         return -EIO;
1736                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1737                 break;
1738         case TPACPI_VIDEO_770:
1739                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1740                         return -EIO;
1741                 if (i)
1742                         status |= TP_ACPI_VIDEO_S_LCD;
1743                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1744                         return -EIO;
1745                 if (i)
1746                         status |= TP_ACPI_VIDEO_S_CRT;
1747                 break;
1748         case TPACPI_VIDEO_NEW:
1749                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1750                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1751                         return -EIO;
1752                 if (i)
1753                         status |= TP_ACPI_VIDEO_S_CRT;
1754
1755                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1756                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1757                         return -EIO;
1758                 if (i)
1759                         status |= TP_ACPI_VIDEO_S_LCD;
1760                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1761                         return -EIO;
1762                 if (i)
1763                         status |= TP_ACPI_VIDEO_S_DVI;
1764                 break;
1765         default:
1766                 return -ENOSYS;
1767         }
1768
1769         return status;
1770 }
1771
1772 static int video_outputsw_set(int status)
1773 {
1774         int autosw;
1775         int res = 0;
1776
1777         switch (video_supported) {
1778         case TPACPI_VIDEO_570:
1779                 res = acpi_evalf(NULL, NULL,
1780                                  "\\_SB.PHS2", "vdd",
1781                                  TP_ACPI_VIDEO_570_PHS2CMD,
1782                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1783                 break;
1784         case TPACPI_VIDEO_770:
1785                 autosw = video_autosw_get();
1786                 if (autosw < 0)
1787                         return autosw;
1788
1789                 res = video_autosw_set(1);
1790                 if (res)
1791                         return res;
1792                 res = acpi_evalf(vid_handle, NULL,
1793                                  "ASWT", "vdd", status * 0x100, 0);
1794                 if (!autosw && video_autosw_set(autosw)) {
1795                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1796                         return -EIO;
1797                 }
1798                 break;
1799         case TPACPI_VIDEO_NEW:
1800                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1801                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1802                 break;
1803         default:
1804                 return -ENOSYS;
1805         }
1806
1807         return (res)? 0 : -EIO;
1808 }
1809
1810 static int video_autosw_get(void)
1811 {
1812         int autosw = 0;
1813
1814         switch (video_supported) {
1815         case TPACPI_VIDEO_570:
1816                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1817                         return -EIO;
1818                 break;
1819         case TPACPI_VIDEO_770:
1820         case TPACPI_VIDEO_NEW:
1821                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1822                         return -EIO;
1823                 break;
1824         default:
1825                 return -ENOSYS;
1826         }
1827
1828         return autosw & 1;
1829 }
1830
1831 static int video_autosw_set(int enable)
1832 {
1833         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1834                 return -EIO;
1835         return 0;
1836 }
1837
1838 static int video_outputsw_cycle(void)
1839 {
1840         int autosw = video_autosw_get();
1841         int res;
1842
1843         if (autosw < 0)
1844                 return autosw;
1845
1846         switch (video_supported) {
1847         case TPACPI_VIDEO_570:
1848                 res = video_autosw_set(1);
1849                 if (res)
1850                         return res;
1851                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1852                 break;
1853         case TPACPI_VIDEO_770:
1854         case TPACPI_VIDEO_NEW:
1855                 res = video_autosw_set(1);
1856                 if (res)
1857                         return res;
1858                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1859                 break;
1860         default:
1861                 return -ENOSYS;
1862         }
1863         if (!autosw && video_autosw_set(autosw)) {
1864                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1865                 return -EIO;
1866         }
1867
1868         return (res)? 0 : -EIO;
1869 }
1870
1871 static int video_expand_toggle(void)
1872 {
1873         switch (video_supported) {
1874         case TPACPI_VIDEO_570:
1875                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1876                         0 : -EIO;
1877         case TPACPI_VIDEO_770:
1878                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1879                         0 : -EIO;
1880         case TPACPI_VIDEO_NEW:
1881                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1882                         0 : -EIO;
1883         default:
1884                 return -ENOSYS;
1885         }
1886         /* not reached */
1887 }
1888
1889 static int video_read(char *p)
1890 {
1891         int status, autosw;
1892         int len = 0;
1893
1894         if (video_supported == TPACPI_VIDEO_NONE) {
1895                 len += sprintf(p + len, "status:\t\tnot supported\n");
1896                 return len;
1897         }
1898
1899         status = video_outputsw_get();
1900         if (status < 0)
1901                 return status;
1902
1903         autosw = video_autosw_get();
1904         if (autosw < 0)
1905                 return autosw;
1906
1907         len += sprintf(p + len, "status:\t\tsupported\n");
1908         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1909         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1910         if (video_supported == TPACPI_VIDEO_NEW)
1911                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1912         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1913         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1914         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1915         if (video_supported == TPACPI_VIDEO_NEW)
1916                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1917         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1918         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1919
1920         return len;
1921 }
1922
1923 static int video_write(char *buf)
1924 {
1925         char *cmd;
1926         int enable, disable, status;
1927         int res;
1928
1929         if (video_supported == TPACPI_VIDEO_NONE)
1930                 return -ENODEV;
1931
1932         enable = 0;
1933         disable = 0;
1934
1935         while ((cmd = next_cmd(&buf))) {
1936                 if (strlencmp(cmd, "lcd_enable") == 0) {
1937                         enable |= TP_ACPI_VIDEO_S_LCD;
1938                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1939                         disable |= TP_ACPI_VIDEO_S_LCD;
1940                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1941                         enable |= TP_ACPI_VIDEO_S_CRT;
1942                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1943                         disable |= TP_ACPI_VIDEO_S_CRT;
1944                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1945                            strlencmp(cmd, "dvi_enable") == 0) {
1946                         enable |= TP_ACPI_VIDEO_S_DVI;
1947                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1948                            strlencmp(cmd, "dvi_disable") == 0) {
1949                         disable |= TP_ACPI_VIDEO_S_DVI;
1950                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1951                         res = video_autosw_set(1);
1952                         if (res)
1953                                 return res;
1954                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1955                         res = video_autosw_set(0);
1956                         if (res)
1957                                 return res;
1958                 } else if (strlencmp(cmd, "video_switch") == 0) {
1959                         res = video_outputsw_cycle();
1960                         if (res)
1961                                 return res;
1962                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1963                         res = video_expand_toggle();
1964                         if (res)
1965                                 return res;
1966                 } else
1967                         return -EINVAL;
1968         }
1969
1970         if (enable || disable) {
1971                 status = video_outputsw_get();
1972                 if (status < 0)
1973                         return status;
1974                 res = video_outputsw_set((status & ~disable) | enable);
1975                 if (res)
1976                         return res;
1977         }
1978
1979         return 0;
1980 }
1981
1982 static struct ibm_struct video_driver_data = {
1983         .name = "video",
1984         .read = video_read,
1985         .write = video_write,
1986         .exit = video_exit,
1987 };
1988
1989 /*************************************************************************
1990  * Light (thinklight) subdriver
1991  */
1992
1993 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1994 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1995
1996 static int __init light_init(struct ibm_init_struct *iibm)
1997 {
1998         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1999
2000         IBM_ACPIHANDLE_INIT(ledb);
2001         IBM_ACPIHANDLE_INIT(lght);
2002         IBM_ACPIHANDLE_INIT(cmos);
2003
2004         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2005         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2006
2007         if (tp_features.light)
2008                 /* light status not supported on
2009                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2010                 tp_features.light_status =
2011                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2012
2013         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2014                 str_supported(tp_features.light));
2015
2016         return (tp_features.light)? 0 : 1;
2017 }
2018
2019 static int light_read(char *p)
2020 {
2021         int len = 0;
2022         int status = 0;
2023
2024         if (!tp_features.light) {
2025                 len += sprintf(p + len, "status:\t\tnot supported\n");
2026         } else if (!tp_features.light_status) {
2027                 len += sprintf(p + len, "status:\t\tunknown\n");
2028                 len += sprintf(p + len, "commands:\ton, off\n");
2029         } else {
2030                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2031                         return -EIO;
2032                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2033                 len += sprintf(p + len, "commands:\ton, off\n");
2034         }
2035
2036         return len;
2037 }
2038
2039 static int light_write(char *buf)
2040 {
2041         int cmos_cmd, lght_cmd;
2042         char *cmd;
2043         int success;
2044
2045         if (!tp_features.light)
2046                 return -ENODEV;
2047
2048         while ((cmd = next_cmd(&buf))) {
2049                 if (strlencmp(cmd, "on") == 0) {
2050                         cmos_cmd = 0x0c;
2051                         lght_cmd = 1;
2052                 } else if (strlencmp(cmd, "off") == 0) {
2053                         cmos_cmd = 0x0d;
2054                         lght_cmd = 0;
2055                 } else
2056                         return -EINVAL;
2057
2058                 success = cmos_handle ?
2059                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2060                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2061                 if (!success)
2062                         return -EIO;
2063         }
2064
2065         return 0;
2066 }
2067
2068 static struct ibm_struct light_driver_data = {
2069         .name = "light",
2070         .read = light_read,
2071         .write = light_write,
2072 };
2073
2074 /*************************************************************************
2075  * Dock subdriver
2076  */
2077
2078 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2079
2080 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2081            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2082            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2083            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2084     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2085
2086 /* don't list other alternatives as we install a notify handler on the 570 */
2087 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2088
2089 static const struct acpi_device_id ibm_pci_device_ids[] = {
2090         {PCI_ROOT_HID_STRING, 0},
2091         {"", 0},
2092 };
2093
2094 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2095         {
2096          .notify = dock_notify,
2097          .handle = &dock_handle,
2098          .type = ACPI_SYSTEM_NOTIFY,
2099         },
2100         {
2101         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2102          * We just use it to get notifications of dock hotplug
2103          * in very old thinkpads */
2104          .hid = ibm_pci_device_ids,
2105          .notify = dock_notify,
2106          .handle = &pci_handle,
2107          .type = ACPI_SYSTEM_NOTIFY,
2108         },
2109 };
2110
2111 static struct ibm_struct dock_driver_data[2] = {
2112         {
2113          .name = "dock",
2114          .read = dock_read,
2115          .write = dock_write,
2116          .acpi = &ibm_dock_acpidriver[0],
2117         },
2118         {
2119          .name = "dock",
2120          .acpi = &ibm_dock_acpidriver[1],
2121         },
2122 };
2123
2124 #define dock_docked() (_sta(dock_handle) & 1)
2125
2126 static int __init dock_init(struct ibm_init_struct *iibm)
2127 {
2128         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2129
2130         IBM_ACPIHANDLE_INIT(dock);
2131
2132         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2133                 str_supported(dock_handle != NULL));
2134
2135         return (dock_handle)? 0 : 1;
2136 }
2137
2138 static int __init dock_init2(struct ibm_init_struct *iibm)
2139 {
2140         int dock2_needed;
2141
2142         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2143
2144         if (dock_driver_data[0].flags.acpi_driver_registered &&
2145             dock_driver_data[0].flags.acpi_notify_installed) {
2146                 IBM_ACPIHANDLE_INIT(pci);
2147                 dock2_needed = (pci_handle != NULL);
2148                 vdbg_printk(TPACPI_DBG_INIT,
2149                             "dock PCI handler for the TP 570 is %s\n",
2150                             str_supported(dock2_needed));
2151         } else {
2152                 vdbg_printk(TPACPI_DBG_INIT,
2153                 "dock subdriver part 2 not required\n");
2154                 dock2_needed = 0;
2155         }
2156
2157         return (dock2_needed)? 0 : 1;
2158 }
2159
2160 static void dock_notify(struct ibm_struct *ibm, u32 event)
2161 {
2162         int docked = dock_docked();
2163         int pci = ibm->acpi->hid && ibm->acpi->device &&
2164                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2165         int data;
2166
2167         if (event == 1 && !pci) /* 570 */
2168                 data = 1;       /* button */
2169         else if (event == 1 && pci)     /* 570 */
2170                 data = 3;       /* dock */
2171         else if (event == 3 && docked)
2172                 data = 1;       /* button */
2173         else if (event == 3 && !docked)
2174                 data = 2;       /* undock */
2175         else if (event == 0 && docked)
2176                 data = 3;       /* dock */
2177         else {
2178                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2179                        event, _sta(dock_handle));
2180                 data = 0;       /* unknown */
2181         }
2182         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2183         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2184                                           ibm->acpi->device->dev.bus_id,
2185                                           event, data);
2186 }
2187
2188 static int dock_read(char *p)
2189 {
2190         int len = 0;
2191         int docked = dock_docked();
2192
2193         if (!dock_handle)
2194                 len += sprintf(p + len, "status:\t\tnot supported\n");
2195         else if (!docked)
2196                 len += sprintf(p + len, "status:\t\tundocked\n");
2197         else {
2198                 len += sprintf(p + len, "status:\t\tdocked\n");
2199                 len += sprintf(p + len, "commands:\tdock, undock\n");
2200         }
2201
2202         return len;
2203 }
2204
2205 static int dock_write(char *buf)
2206 {
2207         char *cmd;
2208
2209         if (!dock_docked())
2210                 return -ENODEV;
2211
2212         while ((cmd = next_cmd(&buf))) {
2213                 if (strlencmp(cmd, "undock") == 0) {
2214                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2215                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2216                                 return -EIO;
2217                 } else if (strlencmp(cmd, "dock") == 0) {
2218                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2219                                 return -EIO;
2220                 } else
2221                         return -EINVAL;
2222         }
2223
2224         return 0;
2225 }
2226
2227 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2228
2229 /*************************************************************************
2230  * Bay subdriver
2231  */
2232
2233 #ifdef CONFIG_THINKPAD_ACPI_BAY
2234 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2235            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2236            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2237            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2238            );                           /* A21e, R30, R31 */
2239 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2240            "_EJ0",              /* all others */
2241            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2242 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2243            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2244            );                           /* all others */
2245 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2246            "_EJ0",                      /* 770x */
2247            );                           /* all others */
2248
2249 static int __init bay_init(struct ibm_init_struct *iibm)
2250 {
2251         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2252
2253         IBM_ACPIHANDLE_INIT(bay);
2254         if (bay_handle)
2255                 IBM_ACPIHANDLE_INIT(bay_ej);
2256         IBM_ACPIHANDLE_INIT(bay2);
2257         if (bay2_handle)
2258                 IBM_ACPIHANDLE_INIT(bay2_ej);
2259
2260         tp_features.bay_status = bay_handle &&
2261                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2262         tp_features.bay_status2 = bay2_handle &&
2263                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2264
2265         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2266                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2267         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2268                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2269
2270         vdbg_printk(TPACPI_DBG_INIT,
2271                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2272                 str_supported(tp_features.bay_status),
2273                 str_supported(tp_features.bay_eject),
2274                 str_supported(tp_features.bay_status2),
2275                 str_supported(tp_features.bay_eject2));
2276
2277         return (tp_features.bay_status || tp_features.bay_eject ||
2278                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2279 }
2280
2281 static void bay_notify(struct ibm_struct *ibm, u32 event)
2282 {
2283         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2284         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2285                                           ibm->acpi->device->dev.bus_id,
2286                                           event, 0);
2287 }
2288
2289 #define bay_occupied(b) (_sta(b##_handle) & 1)
2290
2291 static int bay_read(char *p)
2292 {
2293         int len = 0;
2294         int occupied = bay_occupied(bay);
2295         int occupied2 = bay_occupied(bay2);
2296         int eject, eject2;
2297
2298         len += sprintf(p + len, "status:\t\t%s\n",
2299                 tp_features.bay_status ?
2300                         (occupied ? "occupied" : "unoccupied") :
2301                                 "not supported");
2302         if (tp_features.bay_status2)
2303                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2304                                "occupied" : "unoccupied");
2305
2306         eject = tp_features.bay_eject && occupied;
2307         eject2 = tp_features.bay_eject2 && occupied2;
2308
2309         if (eject && eject2)
2310                 len += sprintf(p + len, "commands:\teject, eject2\n");
2311         else if (eject)
2312                 len += sprintf(p + len, "commands:\teject\n");
2313         else if (eject2)
2314                 len += sprintf(p + len, "commands:\teject2\n");
2315
2316         return len;
2317 }
2318
2319 static int bay_write(char *buf)
2320 {
2321         char *cmd;
2322
2323         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2324                 return -ENODEV;
2325
2326         while ((cmd = next_cmd(&buf))) {
2327                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2328                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2329                                 return -EIO;
2330                 } else if (tp_features.bay_eject2 &&
2331                            strlencmp(cmd, "eject2") == 0) {
2332                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2333                                 return -EIO;
2334                 } else
2335                         return -EINVAL;
2336         }
2337
2338         return 0;
2339 }
2340
2341 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2342         .notify = bay_notify,
2343         .handle = &bay_handle,
2344         .type = ACPI_SYSTEM_NOTIFY,
2345 };
2346
2347 static struct ibm_struct bay_driver_data = {
2348         .name = "bay",
2349         .read = bay_read,
2350         .write = bay_write,
2351         .acpi = &ibm_bay_acpidriver,
2352 };
2353
2354 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2355
2356 /*************************************************************************
2357  * CMOS subdriver
2358  */
2359
2360 /* sysfs cmos_command -------------------------------------------------- */
2361 static ssize_t cmos_command_store(struct device *dev,
2362                             struct device_attribute *attr,
2363                             const char *buf, size_t count)
2364 {
2365         unsigned long cmos_cmd;
2366         int res;
2367
2368         if (parse_strtoul(buf, 21, &cmos_cmd))
2369                 return -EINVAL;
2370
2371         res = issue_thinkpad_cmos_command(cmos_cmd);
2372         return (res)? res : count;
2373 }
2374
2375 static struct device_attribute dev_attr_cmos_command =
2376         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2377
2378 /* --------------------------------------------------------------------- */
2379
2380 static int __init cmos_init(struct ibm_init_struct *iibm)
2381 {
2382         int res;
2383
2384         vdbg_printk(TPACPI_DBG_INIT,
2385                 "initializing cmos commands subdriver\n");
2386
2387         IBM_ACPIHANDLE_INIT(cmos);
2388
2389         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2390                 str_supported(cmos_handle != NULL));
2391
2392         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2393         if (res)
2394                 return res;
2395
2396         return (cmos_handle)? 0 : 1;
2397 }
2398
2399 static void cmos_exit(void)
2400 {
2401         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2402 }
2403
2404 static int cmos_read(char *p)
2405 {
2406         int len = 0;
2407
2408         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2409            R30, R31, T20-22, X20-21 */
2410         if (!cmos_handle)
2411                 len += sprintf(p + len, "status:\t\tnot supported\n");
2412         else {
2413                 len += sprintf(p + len, "status:\t\tsupported\n");
2414                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2415         }
2416
2417         return len;
2418 }
2419
2420 static int cmos_write(char *buf)
2421 {
2422         char *cmd;
2423         int cmos_cmd, res;
2424
2425         while ((cmd = next_cmd(&buf))) {
2426                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2427                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2428                         /* cmos_cmd set */
2429                 } else
2430                         return -EINVAL;
2431
2432                 res = issue_thinkpad_cmos_command(cmos_cmd);
2433                 if (res)
2434                         return res;
2435         }
2436
2437         return 0;
2438 }
2439
2440 static struct ibm_struct cmos_driver_data = {
2441         .name = "cmos",
2442         .read = cmos_read,
2443         .write = cmos_write,
2444         .exit = cmos_exit,
2445 };
2446
2447 /*************************************************************************
2448  * LED subdriver
2449  */
2450
2451 static enum led_access_mode led_supported;
2452
2453 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2454            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2455            "LED",               /* all others */
2456            );                   /* R30, R31 */
2457
2458 static int __init led_init(struct ibm_init_struct *iibm)
2459 {
2460         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2461
2462         IBM_ACPIHANDLE_INIT(led);
2463
2464         if (!led_handle)
2465                 /* led not supported on R30, R31 */
2466                 led_supported = TPACPI_LED_NONE;
2467         else if (strlencmp(led_path, "SLED") == 0)
2468                 /* 570 */
2469                 led_supported = TPACPI_LED_570;
2470         else if (strlencmp(led_path, "SYSL") == 0)
2471                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2472                 led_supported = TPACPI_LED_OLD;
2473         else
2474                 /* all others */
2475                 led_supported = TPACPI_LED_NEW;
2476
2477         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2478                 str_supported(led_supported), led_supported);
2479
2480         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2481 }
2482
2483 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2484
2485 static int led_read(char *p)
2486 {
2487         int len = 0;
2488
2489         if (!led_supported) {
2490                 len += sprintf(p + len, "status:\t\tnot supported\n");
2491                 return len;
2492         }
2493         len += sprintf(p + len, "status:\t\tsupported\n");
2494
2495         if (led_supported == TPACPI_LED_570) {
2496                 /* 570 */
2497                 int i, status;
2498                 for (i = 0; i < 8; i++) {
2499                         if (!acpi_evalf(ec_handle,
2500                                         &status, "GLED", "dd", 1 << i))
2501                                 return -EIO;
2502                         len += sprintf(p + len, "%d:\t\t%s\n",
2503                                        i, led_status(status));
2504                 }
2505         }
2506
2507         len += sprintf(p + len, "commands:\t"
2508                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2509
2510         return len;
2511 }
2512
2513 /* off, on, blink */
2514 static const int led_sled_arg1[] = { 0, 1, 3 };
2515 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2516 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2517 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2518
2519 static int led_write(char *buf)
2520 {
2521         char *cmd;
2522         int led, ind, ret;
2523
2524         if (!led_supported)
2525                 return -ENODEV;
2526
2527         while ((cmd = next_cmd(&buf))) {
2528                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2529                         return -EINVAL;
2530
2531                 if (strstr(cmd, "off")) {
2532                         ind = 0;
2533                 } else if (strstr(cmd, "on")) {
2534                         ind = 1;
2535                 } else if (strstr(cmd, "blink")) {
2536                         ind = 2;
2537                 } else
2538                         return -EINVAL;
2539
2540                 if (led_supported == TPACPI_LED_570) {
2541                         /* 570 */
2542                         led = 1 << led;
2543                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2544                                         led, led_sled_arg1[ind]))
2545                                 return -EIO;
2546                 } else if (led_supported == TPACPI_LED_OLD) {
2547                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2548                         led = 1 << led;
2549                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2550                         if (ret >= 0)
2551                                 ret =
2552                                     ec_write(TPACPI_LED_EC_HLBL,
2553                                              led * led_exp_hlbl[ind]);
2554                         if (ret >= 0)
2555                                 ret =
2556                                     ec_write(TPACPI_LED_EC_HLCL,
2557                                              led * led_exp_hlcl[ind]);
2558                         if (ret < 0)
2559                                 return ret;
2560                 } else {
2561                         /* all others */
2562                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2563                                         led, led_led_arg1[ind]))
2564                                 return -EIO;
2565                 }
2566         }
2567
2568         return 0;
2569 }
2570
2571 static struct ibm_struct led_driver_data = {
2572         .name = "led",
2573         .read = led_read,
2574         .write = led_write,
2575 };
2576
2577 /*************************************************************************
2578  * Beep subdriver
2579  */
2580
2581 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2582
2583 static int __init beep_init(struct ibm_init_struct *iibm)
2584 {
2585         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2586
2587         IBM_ACPIHANDLE_INIT(beep);
2588
2589         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2590                 str_supported(beep_handle != NULL));
2591
2592         return (beep_handle)? 0 : 1;
2593 }
2594
2595 static int beep_read(char *p)
2596 {
2597         int len = 0;
2598
2599         if (!beep_handle)
2600                 len += sprintf(p + len, "status:\t\tnot supported\n");
2601         else {
2602                 len += sprintf(p + len, "status:\t\tsupported\n");
2603                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2604         }
2605
2606         return len;
2607 }
2608
2609 static int beep_write(char *buf)
2610 {
2611         char *cmd;
2612         int beep_cmd;
2613
2614         if (!beep_handle)
2615                 return -ENODEV;
2616
2617         while ((cmd = next_cmd(&buf))) {
2618                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2619                     beep_cmd >= 0 && beep_cmd <= 17) {
2620                         /* beep_cmd set */
2621                 } else
2622                         return -EINVAL;
2623                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2624                         return -EIO;
2625         }
2626
2627         return 0;
2628 }
2629
2630 static struct ibm_struct beep_driver_data = {
2631         .name = "beep",
2632         .read = beep_read,
2633         .write = beep_write,
2634 };
2635
2636 /*************************************************************************
2637  * Thermal subdriver
2638  */
2639
2640 static enum thermal_access_mode thermal_read_mode;
2641
2642 /* sysfs temp##_input -------------------------------------------------- */
2643
2644 static ssize_t thermal_temp_input_show(struct device *dev,
2645                            struct device_attribute *attr,
2646                            char *buf)
2647 {
2648         struct sensor_device_attribute *sensor_attr =
2649                                         to_sensor_dev_attr(attr);
2650         int idx = sensor_attr->index;
2651         s32 value;
2652         int res;
2653
2654         res = thermal_get_sensor(idx, &value);
2655         if (res)
2656                 return res;
2657         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2658                 return -ENXIO;
2659
2660         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2661 }
2662
2663 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2664          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2665
2666 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2667         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2668         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2669         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2670         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2671         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2672         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2673         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2674         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2675         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2676         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2677         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2678         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2679         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2680         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2681         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2682         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2683 };
2684
2685 #define THERMAL_ATTRS(X) \
2686         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2687
2688 static struct attribute *thermal_temp_input_attr[] = {
2689         THERMAL_ATTRS(8),
2690         THERMAL_ATTRS(9),
2691         THERMAL_ATTRS(10),
2692         THERMAL_ATTRS(11),
2693         THERMAL_ATTRS(12),
2694         THERMAL_ATTRS(13),
2695         THERMAL_ATTRS(14),
2696         THERMAL_ATTRS(15),
2697         THERMAL_ATTRS(0),
2698         THERMAL_ATTRS(1),
2699         THERMAL_ATTRS(2),
2700         THERMAL_ATTRS(3),
2701         THERMAL_ATTRS(4),
2702         THERMAL_ATTRS(5),
2703         THERMAL_ATTRS(6),
2704         THERMAL_ATTRS(7),
2705         NULL
2706 };
2707
2708 static const struct attribute_group thermal_temp_input16_group = {
2709         .attrs = thermal_temp_input_attr
2710 };
2711
2712 static const struct attribute_group thermal_temp_input8_group = {
2713         .attrs = &thermal_temp_input_attr[8]
2714 };
2715
2716 #undef THERMAL_SENSOR_ATTR_TEMP
2717 #undef THERMAL_ATTRS
2718
2719 /* --------------------------------------------------------------------- */
2720
2721 static int __init thermal_init(struct ibm_init_struct *iibm)
2722 {
2723         u8 t, ta1, ta2;
2724         int i;
2725         int acpi_tmp7;
2726         int res;
2727
2728         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2729
2730         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2731
2732         if (thinkpad_id.ec_model) {
2733                 /*
2734                  * Direct EC access mode: sensors at registers
2735                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2736                  * non-implemented, thermal sensors return 0x80 when
2737                  * not available
2738                  */
2739
2740                 ta1 = ta2 = 0;
2741                 for (i = 0; i < 8; i++) {
2742                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2743                                 ta1 |= t;
2744                         } else {
2745                                 ta1 = 0;
2746                                 break;
2747                         }
2748                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2749                                 ta2 |= t;
2750                         } else {
2751                                 ta1 = 0;
2752                                 break;
2753                         }
2754                 }
2755                 if (ta1 == 0) {
2756                         /* This is sheer paranoia, but we handle it anyway */
2757                         if (acpi_tmp7) {
2758                                 printk(IBM_ERR
2759                                        "ThinkPad ACPI EC access misbehaving, "
2760                                        "falling back to ACPI TMPx access mode\n");
2761                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2762                         } else {
2763                                 printk(IBM_ERR
2764                                        "ThinkPad ACPI EC access misbehaving, "
2765                                        "disabling thermal sensors access\n");
2766                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2767                         }
2768                 } else {
2769                         thermal_read_mode =
2770                             (ta2 != 0) ?
2771                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2772                 }
2773         } else if (acpi_tmp7) {
2774                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2775                         /* 600e/x, 770e, 770x */
2776                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2777                 } else {
2778                         /* Standard ACPI TMPx access, max 8 sensors */
2779                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2780                 }
2781         } else {
2782                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2783                 thermal_read_mode = TPACPI_THERMAL_NONE;
2784         }
2785
2786         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2787                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2788                 thermal_read_mode);
2789
2790         switch(thermal_read_mode) {
2791         case TPACPI_THERMAL_TPEC_16:
2792                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2793                                 &thermal_temp_input16_group);
2794                 if (res)
2795                         return res;
2796                 break;
2797         case TPACPI_THERMAL_TPEC_8:
2798         case TPACPI_THERMAL_ACPI_TMP07:
2799         case TPACPI_THERMAL_ACPI_UPDT:
2800                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2801                                 &thermal_temp_input8_group);
2802                 if (res)
2803                         return res;
2804                 break;
2805         case TPACPI_THERMAL_NONE:
2806         default:
2807                 return 1;
2808         }
2809
2810         return 0;
2811 }
2812
2813 static void thermal_exit(void)
2814 {
2815         switch(thermal_read_mode) {
2816         case TPACPI_THERMAL_TPEC_16:
2817                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2818                                    &thermal_temp_input16_group);
2819                 break;
2820         case TPACPI_THERMAL_TPEC_8:
2821         case TPACPI_THERMAL_ACPI_TMP07:
2822         case TPACPI_THERMAL_ACPI_UPDT:
2823                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2824                                    &thermal_temp_input16_group);
2825                 break;
2826         case TPACPI_THERMAL_NONE:
2827         default:
2828                 break;
2829         }
2830 }
2831
2832 /* idx is zero-based */
2833 static int thermal_get_sensor(int idx, s32 *value)
2834 {
2835         int t;
2836         s8 tmp;
2837         char tmpi[5];
2838
2839         t = TP_EC_THERMAL_TMP0;
2840
2841         switch (thermal_read_mode) {
2842 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2843         case TPACPI_THERMAL_TPEC_16:
2844                 if (idx >= 8 && idx <= 15) {
2845                         t = TP_EC_THERMAL_TMP8;
2846                         idx -= 8;
2847                 }
2848                 /* fallthrough */
2849 #endif
2850         case TPACPI_THERMAL_TPEC_8:
2851                 if (idx <= 7) {
2852                         if (!acpi_ec_read(t + idx, &tmp))
2853                                 return -EIO;
2854                         *value = tmp * 1000;
2855                         return 0;
2856                 }
2857                 break;
2858
2859         case TPACPI_THERMAL_ACPI_UPDT:
2860                 if (idx <= 7) {
2861                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2862                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2863                                 return -EIO;
2864                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2865                                 return -EIO;
2866                         *value = (t - 2732) * 100;
2867                         return 0;
2868                 }
2869                 break;
2870
2871         case TPACPI_THERMAL_ACPI_TMP07:
2872                 if (idx <= 7) {
2873                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2874                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2875                                 return -EIO;
2876                         if (t > 127 || t < -127)
2877                                 t = TP_EC_THERMAL_TMP_NA;
2878                         *value = t * 1000;
2879                         return 0;
2880                 }
2881                 break;
2882
2883         case TPACPI_THERMAL_NONE:
2884         default:
2885                 return -ENOSYS;
2886         }
2887
2888         return -EINVAL;
2889 }
2890
2891 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2892 {
2893         int res, i;
2894         int n;
2895
2896         n = 8;
2897         i = 0;
2898
2899         if (!s)
2900                 return -EINVAL;
2901
2902         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2903                 n = 16;
2904
2905         for(i = 0 ; i < n; i++) {
2906                 res = thermal_get_sensor(i, &s->temp[i]);
2907                 if (res)
2908                         return res;
2909         }
2910
2911         return n;
2912 }
2913
2914 static int thermal_read(char *p)
2915 {
2916         int len = 0;
2917         int n, i;
2918         struct ibm_thermal_sensors_struct t;
2919
2920         n = thermal_get_sensors(&t);
2921         if (unlikely(n < 0))
2922                 return n;
2923
2924         len += sprintf(p + len, "temperatures:\t");
2925
2926         if (n > 0) {
2927                 for (i = 0; i < (n - 1); i++)
2928                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2929                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2930         } else
2931                 len += sprintf(p + len, "not supported\n");
2932
2933         return len;
2934 }
2935
2936 static struct ibm_struct thermal_driver_data = {
2937         .name = "thermal",
2938         .read = thermal_read,
2939         .exit = thermal_exit,
2940 };
2941
2942 /*************************************************************************
2943  * EC Dump subdriver
2944  */
2945
2946 static u8 ecdump_regs[256];
2947
2948 static int ecdump_read(char *p)
2949 {
2950         int len = 0;
2951         int i, j;
2952         u8 v;
2953
2954         len += sprintf(p + len, "EC      "
2955                        " +00 +01 +02 +03 +04 +05 +06 +07"
2956                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2957         for (i = 0; i < 256; i += 16) {
2958                 len += sprintf(p + len, "EC 0x%02x:", i);
2959                 for (j = 0; j < 16; j++) {
2960                         if (!acpi_ec_read(i + j, &v))
2961                                 break;
2962                         if (v != ecdump_regs[i + j])
2963                                 len += sprintf(p + len, " *%02x", v);
2964                         else
2965                                 len += sprintf(p + len, "  %02x", v);
2966                         ecdump_regs[i + j] = v;
2967                 }
2968                 len += sprintf(p + len, "\n");
2969                 if (j != 16)
2970                         break;
2971         }
2972
2973         /* These are way too dangerous to advertise openly... */
2974 #if 0
2975         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2976                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2977         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2978                        " (<offset> is 00-ff, <value> is 0-255)\n");
2979 #endif
2980         return len;
2981 }
2982
2983 static int ecdump_write(char *buf)
2984 {
2985         char *cmd;
2986         int i, v;
2987
2988         while ((cmd = next_cmd(&buf))) {
2989                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2990                         /* i and v set */
2991                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2992                         /* i and v set */
2993                 } else
2994                         return -EINVAL;
2995                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2996                         if (!acpi_ec_write(i, v))
2997                                 return -EIO;
2998                 } else
2999                         return -EINVAL;
3000         }
3001
3002         return 0;
3003 }
3004
3005 static struct ibm_struct ecdump_driver_data = {
3006         .name = "ecdump",
3007         .read = ecdump_read,
3008         .write = ecdump_write,
3009         .flags.experimental = 1,
3010 };
3011
3012 /*************************************************************************
3013  * Backlight/brightness subdriver
3014  */
3015
3016 static struct backlight_device *ibm_backlight_device;
3017
3018 static struct backlight_ops ibm_backlight_data = {
3019         .get_brightness = brightness_get,
3020         .update_status  = brightness_update_status,
3021 };
3022
3023 static struct mutex brightness_mutex;
3024
3025 static int __init brightness_init(struct ibm_init_struct *iibm)
3026 {
3027         int b;
3028
3029         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3030
3031         mutex_init(&brightness_mutex);
3032
3033         if (!brightness_mode) {
3034                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3035                         brightness_mode = 2;
3036                 else
3037                         brightness_mode = 3;
3038
3039                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3040                         brightness_mode);
3041         }
3042
3043         if (brightness_mode > 3)
3044                 return -EINVAL;
3045
3046         b = brightness_get(NULL);
3047         if (b < 0)
3048                 return 1;
3049
3050         ibm_backlight_device = backlight_device_register(
3051                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3052                                         &ibm_backlight_data);
3053         if (IS_ERR(ibm_backlight_device)) {
3054                 printk(IBM_ERR "Could not register backlight device\n");
3055                 return PTR_ERR(ibm_backlight_device);
3056         }
3057         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3058
3059         ibm_backlight_device->props.max_brightness = 7;
3060         ibm_backlight_device->props.brightness = b;
3061         backlight_update_status(ibm_backlight_device);
3062
3063         return 0;
3064 }
3065
3066 static void brightness_exit(void)
3067 {
3068         if (ibm_backlight_device) {
3069                 vdbg_printk(TPACPI_DBG_EXIT,
3070                             "calling backlight_device_unregister()\n");
3071                 backlight_device_unregister(ibm_backlight_device);
3072                 ibm_backlight_device = NULL;
3073         }
3074 }
3075
3076 static int brightness_update_status(struct backlight_device *bd)
3077 {
3078         return brightness_set(
3079                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3080                  bd->props.power == FB_BLANK_UNBLANK) ?
3081                                 bd->props.brightness : 0);
3082 }
3083
3084 /*
3085  * ThinkPads can read brightness from two places: EC 0x31, or
3086  * CMOS NVRAM byte 0x5E, bits 0-3.
3087  */
3088 static int brightness_get(struct backlight_device *bd)
3089 {
3090         u8 lec = 0, lcmos = 0, level = 0;
3091
3092         if (brightness_mode & 1) {
3093                 if (!acpi_ec_read(brightness_offset, &lec))
3094                         return -EIO;
3095                 lec &= 7;
3096                 level = lec;
3097         };
3098         if (brightness_mode & 2) {
3099                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3100                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3101                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3102                 level = lcmos;
3103         }
3104
3105         if (brightness_mode == 3 && lec != lcmos) {
3106                 printk(IBM_ERR
3107                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3108                         "on display brightness level\n",
3109                         (unsigned int) lcmos,
3110                         (unsigned int) lec);
3111                 return -EIO;
3112         }
3113
3114         return level;
3115 }
3116
3117 static int brightness_set(int value)
3118 {
3119         int cmos_cmd, inc, i, res;
3120         int current_value;
3121
3122         if (value > 7)
3123                 return -EINVAL;
3124
3125         res = mutex_lock_interruptible(&brightness_mutex);
3126         if (res < 0)
3127                 return res;
3128
3129         current_value = brightness_get(NULL);
3130         if (current_value < 0) {
3131                 res = current_value;
3132                 goto errout;
3133         }
3134
3135         cmos_cmd = value > current_value ?
3136                         TP_CMOS_BRIGHTNESS_UP :
3137                         TP_CMOS_BRIGHTNESS_DOWN;
3138         inc = value > current_value ? 1 : -1;
3139
3140         res = 0;
3141         for (i = current_value; i != value; i += inc) {
3142                 if ((brightness_mode & 2) &&
3143                     issue_thinkpad_cmos_command(cmos_cmd)) {
3144                         res = -EIO;
3145                         goto errout;
3146                 }
3147                 if ((brightness_mode & 1) &&
3148                     !acpi_ec_write(brightness_offset, i + inc)) {
3149                         res = -EIO;
3150                         goto errout;;
3151                 }
3152         }
3153
3154 errout:
3155         mutex_unlock(&brightness_mutex);
3156         return res;
3157 }
3158
3159 static int brightness_read(char *p)
3160 {
3161         int len = 0;
3162         int level;
3163
3164         if ((level = brightness_get(NULL)) < 0) {
3165                 len += sprintf(p + len, "level:\t\tunreadable\n");
3166         } else {
3167                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3168                 len += sprintf(p + len, "commands:\tup, down\n");
3169                 len += sprintf(p + len, "commands:\tlevel <level>"
3170                                " (<level> is 0-7)\n");
3171         }
3172
3173         return len;
3174 }
3175
3176 static int brightness_write(char *buf)
3177 {
3178         int level;
3179         int new_level;
3180         char *cmd;
3181
3182         while ((cmd = next_cmd(&buf))) {
3183                 if ((level = brightness_get(NULL)) < 0)
3184                         return level;
3185                 level &= 7;
3186
3187                 if (strlencmp(cmd, "up") == 0) {
3188                         new_level = level == 7 ? 7 : level + 1;
3189                 } else if (strlencmp(cmd, "down") == 0) {
3190                         new_level = level == 0 ? 0 : level - 1;
3191                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3192                            new_level >= 0 && new_level <= 7) {
3193                         /* new_level set */
3194                 } else
3195                         return -EINVAL;
3196
3197                 brightness_set(new_level);
3198         }
3199
3200         return 0;
3201 }
3202
3203 static struct ibm_struct brightness_driver_data = {
3204         .name = "brightness",
3205         .read = brightness_read,
3206         .write = brightness_write,
3207         .exit = brightness_exit,
3208 };
3209
3210 /*************************************************************************
3211  * Volume subdriver
3212  */
3213
3214 static int volume_read(char *p)
3215 {
3216         int len = 0;
3217         u8 level;
3218
3219         if (!acpi_ec_read(volume_offset, &level)) {
3220                 len += sprintf(p + len, "level:\t\tunreadable\n");
3221         } else {
3222                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3223                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3224                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3225                 len += sprintf(p + len, "commands:\tlevel <level>"
3226                                " (<level> is 0-15)\n");
3227         }
3228
3229         return len;
3230 }
3231
3232 static int volume_write(char *buf)
3233 {
3234         int cmos_cmd, inc, i;
3235         u8 level, mute;
3236         int new_level, new_mute;
3237         char *cmd;
3238
3239         while ((cmd = next_cmd(&buf))) {
3240                 if (!acpi_ec_read(volume_offset, &level))
3241                         return -EIO;
3242                 new_mute = mute = level & 0x40;
3243                 new_level = level = level & 0xf;
3244
3245                 if (strlencmp(cmd, "up") == 0) {
3246                         if (mute)
3247                                 new_mute = 0;
3248                         else
3249                                 new_level = level == 15 ? 15 : level + 1;
3250                 } else if (strlencmp(cmd, "down") == 0) {
3251                         if (mute)
3252                                 new_mute = 0;
3253                         else
3254                                 new_level = level == 0 ? 0 : level - 1;
3255                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3256                            new_level >= 0 && new_level <= 15) {
3257                         /* new_level set */
3258                 } else if (strlencmp(cmd, "mute") == 0) {
3259                         new_mute = 0x40;
3260                 } else
3261                         return -EINVAL;
3262
3263                 if (new_level != level) {       /* mute doesn't change */
3264                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3265                         inc = new_level > level ? 1 : -1;
3266
3267                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3268                                      !acpi_ec_write(volume_offset, level)))
3269                                 return -EIO;
3270
3271                         for (i = level; i != new_level; i += inc)
3272                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3273                                     !acpi_ec_write(volume_offset, i + inc))
3274                                         return -EIO;
3275
3276                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3277                                      !acpi_ec_write(volume_offset,
3278                                                     new_level + mute)))
3279                                 return -EIO;
3280                 }
3281
3282                 if (new_mute != mute) { /* level doesn't change */
3283                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3284
3285                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3286                             !acpi_ec_write(volume_offset, level + new_mute))
3287                                 return -EIO;
3288                 }
3289         }
3290
3291         return 0;
3292 }
3293
3294 static struct ibm_struct volume_driver_data = {
3295         .name = "volume",
3296         .read = volume_read,
3297         .write = volume_write,
3298 };
3299
3300 /*************************************************************************
3301  * Fan subdriver
3302  */
3303
3304 /*
3305  * FAN ACCESS MODES
3306  *
3307  * TPACPI_FAN_RD_ACPI_GFAN:
3308  *      ACPI GFAN method: returns fan level
3309  *
3310  *      see TPACPI_FAN_WR_ACPI_SFAN
3311  *      EC 0x2f (HFSP) not available if GFAN exists
3312  *
3313  * TPACPI_FAN_WR_ACPI_SFAN:
3314  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3315  *
3316  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3317  *      it for writing.
3318  *
3319  * TPACPI_FAN_WR_TPEC:
3320  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3321  *      Supported on almost all ThinkPads
3322  *
3323  *      Fan speed changes of any sort (including those caused by the
3324  *      disengaged mode) are usually done slowly by the firmware as the
3325  *      maximum ammount of fan duty cycle change per second seems to be
3326  *      limited.
3327  *
3328  *      Reading is not available if GFAN exists.
3329  *      Writing is not available if SFAN exists.
3330  *
3331  *      Bits
3332  *       7      automatic mode engaged;
3333  *              (default operation mode of the ThinkPad)
3334  *              fan level is ignored in this mode.
3335  *       6      full speed mode (takes precedence over bit 7);
3336  *              not available on all thinkpads.  May disable
3337  *              the tachometer while the fan controller ramps up
3338  *              the speed (which can take up to a few *minutes*).
3339  *              Speeds up fan to 100% duty-cycle, which is far above
3340  *              the standard RPM levels.  It is not impossible that
3341  *              it could cause hardware damage.
3342  *      5-3     unused in some models.  Extra bits for fan level
3343  *              in others, but still useless as all values above
3344  *              7 map to the same speed as level 7 in these models.
3345  *      2-0     fan level (0..7 usually)
3346  *                      0x00 = stop
3347  *                      0x07 = max (set when temperatures critical)
3348  *              Some ThinkPads may have other levels, see
3349  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3350  *
3351  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3352  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3353  *      does so, its initial value is meaningless (0x07).
3354  *
3355  *      For firmware bugs, refer to:
3356  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3357  *
3358  *      ----
3359  *
3360  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3361  *      Main fan tachometer reading (in RPM)
3362  *
3363  *      This register is present on all ThinkPads with a new-style EC, and
3364  *      it is known not to be present on the A21m/e, and T22, as there is
3365  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3366  *      ThinkPads from this same time period (and earlier) probably lack the
3367  *      tachometer as well.
3368  *
3369  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3370  *      was never fixed by IBM to report the EC firmware version string
3371  *      probably support the tachometer (like the early X models), so
3372  *      detecting it is quite hard.  We need more data to know for sure.
3373  *
3374  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3375  *      might result.
3376  *
3377  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3378  *      mode.
3379  *
3380  *      For firmware bugs, refer to:
3381  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3382  *
3383  * TPACPI_FAN_WR_ACPI_FANS:
3384  *      ThinkPad X31, X40, X41.  Not available in the X60.
3385  *
3386  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3387  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3388  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3389  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3390  *
3391  *      The speeds are stored on handles
3392  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3393  *
3394  *      There are three default speed sets, acessible as handles:
3395  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3396  *
3397  *      ACPI DSDT switches which set is in use depending on various
3398  *      factors.
3399  *
3400  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3401  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3402  *      but the ACPI tables just mention level 7.
3403  */
3404
3405 static enum fan_status_access_mode fan_status_access_mode;
3406 static enum fan_control_access_mode fan_control_access_mode;
3407 static enum fan_control_commands fan_control_commands;
3408
3409 static u8 fan_control_initial_status;
3410 static u8 fan_control_desired_level;
3411
3412 static void fan_watchdog_fire(struct work_struct *ignored);
3413 static int fan_watchdog_maxinterval;
3414 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3415
3416 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3417 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3418            "\\FSPD",            /* 600e/x, 770e, 770x */
3419            );                   /* all others */
3420 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3421            "JFNS",              /* 770x-JL */
3422            );                   /* all others */
3423
3424 /*
3425  * SYSFS fan layout: hwmon compatible (device)
3426  *
3427  * pwm*_enable:
3428  *      0: "disengaged" mode
3429  *      1: manual mode
3430  *      2: native EC "auto" mode (recommended, hardware default)
3431  *
3432  * pwm*: set speed in manual mode, ignored otherwise.
3433  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3434  *      interpolation.
3435  *
3436  * fan*_input: tachometer reading, RPM
3437  *
3438  *
3439  * SYSFS fan layout: extensions
3440  *
3441  * fan_watchdog (driver):
3442  *      fan watchdog interval in seconds, 0 disables (default), max 120
3443  */
3444
3445 /* sysfs fan pwm1_enable ----------------------------------------------- */
3446 static ssize_t fan_pwm1_enable_show(struct device *dev,
3447                                     struct device_attribute *attr,
3448                                     char *buf)
3449 {
3450         int res, mode;
3451         u8 status;
3452
3453         res = fan_get_status_safe(&status);
3454         if (res)
3455                 return res;
3456
3457         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3458                 if (status != fan_control_initial_status) {
3459                         tp_features.fan_ctrl_status_undef = 0;
3460                 } else {
3461                         /* Return most likely status. In fact, it
3462                          * might be the only possible status */
3463                         status = TP_EC_FAN_AUTO;
3464                 }
3465         }
3466
3467         if (status & TP_EC_FAN_FULLSPEED) {
3468                 mode = 0;
3469         } else if (status & TP_EC_FAN_AUTO) {
3470                 mode = 2;
3471         } else
3472                 mode = 1;
3473
3474         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3475 }
3476
3477 static ssize_t fan_pwm1_enable_store(struct device *dev,
3478                                      struct device_attribute *attr,
3479                                      const char *buf, size_t count)
3480 {
3481         unsigned long t;
3482         int res, level;
3483
3484         if (parse_strtoul(buf, 2, &t))
3485                 return -EINVAL;
3486
3487         switch (t) {
3488         case 0:
3489                 level = TP_EC_FAN_FULLSPEED;
3490                 break;
3491         case 1:
3492                 level = TPACPI_FAN_LAST_LEVEL;
3493                 break;
3494         case 2:
3495                 level = TP_EC_FAN_AUTO;
3496                 break;
3497         case 3:
3498                 /* reserved for software-controlled auto mode */
3499                 return -ENOSYS;
3500         default:
3501                 return -EINVAL;
3502         }
3503
3504         res = fan_set_level_safe(level);
3505         if (res == -ENXIO)
3506                 return -EINVAL;
3507         else if (res < 0)
3508                 return res;
3509
3510         fan_watchdog_reset();
3511
3512         return count;
3513 }
3514
3515 static struct device_attribute dev_attr_fan_pwm1_enable =
3516         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3517                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3518
3519 /* sysfs fan pwm1 ------------------------------------------------------ */
3520 static ssize_t fan_pwm1_show(struct device *dev,
3521                              struct device_attribute *attr,
3522                              char *buf)
3523 {
3524         int res;
3525         u8 status;
3526
3527         res = fan_get_status_safe(&status);
3528         if (res)
3529                 return res;
3530
3531         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3532                 if (status != fan_control_initial_status) {
3533                         tp_features.fan_ctrl_status_undef = 0;
3534                 } else {
3535                         status = TP_EC_FAN_AUTO;
3536                 }
3537         }
3538
3539         if ((status &
3540              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3541                 status = fan_control_desired_level;
3542
3543         if (status > 7)
3544                 status = 7;
3545
3546         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3547 }
3548
3549 static ssize_t fan_pwm1_store(struct device *dev,
3550                               struct device_attribute *attr,
3551                               const char *buf, size_t count)
3552 {
3553         unsigned long s;
3554         int rc;
3555         u8 status, newlevel;
3556
3557         if (parse_strtoul(buf, 255, &s))
3558                 return -EINVAL;
3559
3560         /* scale down from 0-255 to 0-7 */
3561         newlevel = (s >> 5) & 0x07;
3562
3563         rc = mutex_lock_interruptible(&fan_mutex);
3564         if (rc < 0)
3565                 return rc;
3566
3567         rc = fan_get_status(&status);
3568         if (!rc && (status &
3569                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3570                 rc = fan_set_level(newlevel);
3571                 if (rc == -ENXIO)
3572                         rc = -EINVAL;
3573                 else if (!rc) {
3574                         fan_update_desired_level(newlevel);
3575                         fan_watchdog_reset();
3576                 }
3577         }
3578
3579         mutex_unlock(&fan_mutex);
3580         return (rc)? rc : count;
3581 }
3582
3583 static struct device_attribute dev_attr_fan_pwm1 =
3584         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3585                 fan_pwm1_show, fan_pwm1_store);
3586
3587 /* sysfs fan fan1_input ------------------------------------------------ */
3588 static ssize_t fan_fan1_input_show(struct device *dev,
3589                            struct device_attribute *attr,
3590                            char *buf)
3591 {
3592         int res;
3593         unsigned int speed;
3594
3595         res = fan_get_speed(&speed);
3596         if (res < 0)
3597                 return res;
3598
3599         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3600 }
3601
3602 static struct device_attribute dev_attr_fan_fan1_input =
3603         __ATTR(fan1_input, S_IRUGO,
3604                 fan_fan1_input_show, NULL);
3605
3606 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3607 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3608                                      char *buf)
3609 {
3610         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3611 }
3612
3613 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3614                                       const char *buf, size_t count)
3615 {
3616         unsigned long t;
3617
3618         if (parse_strtoul(buf, 120, &t))
3619                 return -EINVAL;
3620
3621         if (!fan_control_allowed)
3622                 return -EPERM;
3623
3624         fan_watchdog_maxinterval = t;
3625         fan_watchdog_reset();
3626
3627         return count;
3628 }
3629
3630 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3631                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3632
3633 /* --------------------------------------------------------------------- */
3634 static struct attribute *fan_attributes[] = {
3635         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3636         &dev_attr_fan_fan1_input.attr,
3637         NULL
3638 };
3639
3640 static const struct attribute_group fan_attr_group = {
3641         .attrs = fan_attributes,
3642 };
3643
3644 static int __init fan_init(struct ibm_init_struct *iibm)
3645 {
3646         int rc;
3647
3648         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3649
3650         mutex_init(&fan_mutex);
3651         fan_status_access_mode = TPACPI_FAN_NONE;
3652         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3653         fan_control_commands = 0;
3654         fan_watchdog_maxinterval = 0;
3655         tp_features.fan_ctrl_status_undef = 0;
3656         fan_control_desired_level = 7;
3657
3658         IBM_ACPIHANDLE_INIT(fans);
3659         IBM_ACPIHANDLE_INIT(gfan);
3660         IBM_ACPIHANDLE_INIT(sfan);
3661
3662         if (gfan_handle) {
3663                 /* 570, 600e/x, 770e, 770x */
3664                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3665         } else {
3666                 /* all other ThinkPads: note that even old-style
3667                  * ThinkPad ECs supports the fan control register */
3668                 if (likely(acpi_ec_read(fan_status_offset,
3669                                         &fan_control_initial_status))) {
3670                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3671
3672                         /* In some ThinkPads, neither the EC nor the ACPI
3673                          * DSDT initialize the fan status, and it ends up
3674                          * being set to 0x07 when it *could* be either
3675                          * 0x07 or 0x80.
3676                          *
3677                          * Enable for TP-1Y (T43), TP-78 (R51e),
3678                          * TP-76 (R52), TP-70 (T43, R52), which are known
3679                          * to be buggy. */
3680                         if (fan_control_initial_status == 0x07) {
3681                                 switch (thinkpad_id.ec_model) {
3682                                 case 0x5931: /* TP-1Y */
3683                                 case 0x3837: /* TP-78 */
3684                                 case 0x3637: /* TP-76 */
3685                                 case 0x3037: /* TP-70 */
3686                                         printk(IBM_NOTICE
3687                                                "fan_init: initial fan status is "
3688                                                "unknown, assuming it is in auto "
3689                                                "mode\n");
3690                                         tp_features.fan_ctrl_status_undef = 1;
3691                                         ;;
3692                                 }
3693                         }
3694                 } else {
3695                         printk(IBM_ERR
3696                                "ThinkPad ACPI EC access misbehaving, "
3697                                "fan status and control unavailable\n");
3698                         return 1;
3699                 }
3700         }
3701
3702         if (sfan_handle) {
3703                 /* 570, 770x-JL */
3704                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3705                 fan_control_commands |=
3706                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3707         } else {
3708                 if (!gfan_handle) {
3709                         /* gfan without sfan means no fan control */
3710                         /* all other models implement TP EC 0x2f control */
3711
3712                         if (fans_handle) {
3713                                 /* X31, X40, X41 */
3714                                 fan_control_access_mode =
3715                                     TPACPI_FAN_WR_ACPI_FANS;
3716                                 fan_control_commands |=
3717                                     TPACPI_FAN_CMD_SPEED |
3718                                     TPACPI_FAN_CMD_LEVEL |
3719                                     TPACPI_FAN_CMD_ENABLE;
3720                         } else {
3721                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3722                                 fan_control_commands |=
3723                                     TPACPI_FAN_CMD_LEVEL |
3724                                     TPACPI_FAN_CMD_ENABLE;
3725                         }
3726                 }
3727         }
3728
3729         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3730                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3731                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3732                 fan_status_access_mode, fan_control_access_mode);
3733
3734         /* fan control master switch */
3735         if (!fan_control_allowed) {
3736                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3737                 fan_control_commands = 0;
3738                 dbg_printk(TPACPI_DBG_INIT,
3739                            "fan control features disabled by parameter\n");
3740         }
3741
3742         /* update fan_control_desired_level */
3743         if (fan_status_access_mode != TPACPI_FAN_NONE)
3744                 fan_get_status_safe(NULL);
3745
3746         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3747             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3748                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3749                                          &fan_attr_group);
3750                 if (!(rc < 0))
3751                         rc = driver_create_file(&tpacpi_pdriver.driver,
3752                                         &driver_attr_fan_watchdog);
3753                 if (rc < 0)
3754                         return rc;
3755                 return 0;
3756         } else
3757                 return 1;
3758 }
3759
3760 /*
3761  * Call with fan_mutex held
3762  */
3763 static void fan_update_desired_level(u8 status)
3764 {
3765         if ((status &
3766              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3767                 if (status > 7)
3768                         fan_control_desired_level = 7;
3769                 else
3770                         fan_control_desired_level = status;
3771         }
3772 }
3773
3774 static int fan_get_status(u8 *status)
3775 {
3776         u8 s;
3777
3778         /* TODO:
3779          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3780
3781         switch (fan_status_access_mode) {
3782         case TPACPI_FAN_RD_ACPI_GFAN:
3783                 /* 570, 600e/x, 770e, 770x */
3784
3785                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3786                         return -EIO;
3787
3788                 if (likely(status))
3789                         *status = s & 0x07;
3790
3791                 break;
3792
3793         case TPACPI_FAN_RD_TPEC:
3794                 /* all except 570, 600e/x, 770e, 770x */
3795                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3796                         return -EIO;
3797
3798                 if (likely(status))
3799                         *status = s;
3800
3801                 break;
3802
3803         default:
3804                 return -ENXIO;
3805         }
3806
3807         return 0;
3808 }
3809
3810 static int fan_get_status_safe(u8 *status)
3811 {
3812         int rc;
3813         u8 s;
3814
3815         rc = mutex_lock_interruptible(&fan_mutex);
3816         if (rc < 0)
3817                 return rc;
3818         rc = fan_get_status(&s);
3819         if (!rc)
3820                 fan_update_desired_level(s);
3821         mutex_unlock(&fan_mutex);
3822
3823         if (status)
3824                 *status = s;
3825
3826         return rc;
3827 }
3828
3829 static void fan_exit(void)
3830 {
3831         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3832
3833         /* FIXME: can we really do this unconditionally? */
3834         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3835         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3836
3837         cancel_delayed_work(&fan_watchdog_task);
3838         flush_scheduled_work();
3839 }
3840
3841 static int fan_get_speed(unsigned int *speed)
3842 {
3843         u8 hi, lo;
3844
3845         switch (fan_status_access_mode) {
3846         case TPACPI_FAN_RD_TPEC:
3847                 /* all except 570, 600e/x, 770e, 770x */
3848                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3849                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3850                         return -EIO;
3851
3852                 if (likely(speed))
3853                         *speed = (hi << 8) | lo;
3854
3855                 break;
3856
3857         default:
3858                 return -ENXIO;
3859         }
3860
3861         return 0;
3862 }
3863
3864 static void fan_watchdog_fire(struct work_struct *ignored)
3865 {
3866         int rc;
3867
3868         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3869         rc = fan_set_enable();
3870         if (rc < 0) {
3871                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3872                         "will try again later...\n", -rc);
3873                 /* reschedule for later */
3874                 fan_watchdog_reset();
3875         }
3876 }
3877
3878 static void fan_watchdog_reset(void)
3879 {
3880         static int fan_watchdog_active;
3881
3882         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3883                 return;
3884
3885         if (fan_watchdog_active)
3886                 cancel_delayed_work(&fan_watchdog_task);
3887
3888         if (fan_watchdog_maxinterval > 0) {
3889                 fan_watchdog_active = 1;
3890                 if (!schedule_delayed_work(&fan_watchdog_task,
3891                                 msecs_to_jiffies(fan_watchdog_maxinterval
3892                                                  * 1000))) {
3893                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3894                                "watchdog will not trigger\n");
3895                 }
3896         } else
3897                 fan_watchdog_active = 0;
3898 }
3899
3900 static int fan_set_level(int level)
3901 {
3902         if (!fan_control_allowed)
3903                 return -EPERM;
3904
3905         switch (fan_control_access_mode) {
3906         case TPACPI_FAN_WR_ACPI_SFAN:
3907                 if (level >= 0 && level <= 7) {
3908                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3909                                 return -EIO;
3910                 } else
3911                         return -EINVAL;
3912                 break;
3913
3914         case TPACPI_FAN_WR_ACPI_FANS:
3915         case TPACPI_FAN_WR_TPEC:
3916                 if ((level != TP_EC_FAN_AUTO) &&
3917                     (level != TP_EC_FAN_FULLSPEED) &&
3918                     ((level < 0) || (level > 7)))
3919                         return -EINVAL;
3920
3921                 /* safety net should the EC not support AUTO
3922                  * or FULLSPEED mode bits and just ignore them */
3923                 if (level & TP_EC_FAN_FULLSPEED)
3924                         level |= 7;     /* safety min speed 7 */
3925                 else if (level & TP_EC_FAN_FULLSPEED)
3926                         level |= 4;     /* safety min speed 4 */
3927
3928                 if (!acpi_ec_write(fan_status_offset, level))
3929                         return -EIO;
3930                 else
3931                         tp_features.fan_ctrl_status_undef = 0;
3932                 break;
3933
3934         default:
3935                 return -ENXIO;
3936         }
3937         return 0;
3938 }
3939
3940 static int fan_set_level_safe(int level)
3941 {
3942         int rc;
3943
3944         if (!fan_control_allowed)
3945                 return -EPERM;
3946
3947         rc = mutex_lock_interruptible(&fan_mutex);
3948         if (rc < 0)
3949                 return rc;
3950
3951         if (level == TPACPI_FAN_LAST_LEVEL)
3952                 level = fan_control_desired_level;
3953
3954         rc = fan_set_level(level);
3955         if (!rc)
3956                 fan_update_desired_level(level);
3957
3958         mutex_unlock(&fan_mutex);
3959         return rc;
3960 }
3961
3962 static int fan_set_enable(void)
3963 {
3964         u8 s;
3965         int rc;
3966
3967         if (!fan_control_allowed)
3968                 return -EPERM;
3969
3970         rc = mutex_lock_interruptible(&fan_mutex);
3971         if (rc < 0)
3972                 return rc;
3973
3974         switch (fan_control_access_mode) {
3975         case TPACPI_FAN_WR_ACPI_FANS:
3976         case TPACPI_FAN_WR_TPEC:
3977                 rc = fan_get_status(&s);
3978                 if (rc < 0)
3979                         break;
3980
3981                 /* Don't go out of emergency fan mode */
3982                 if (s != 7) {
3983                         s &= 0x07;
3984                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3985                 }
3986
3987                 if (!acpi_ec_write(fan_status_offset, s))
3988                         rc = -EIO;
3989                 else {
3990                         tp_features.fan_ctrl_status_undef = 0;
3991                         rc = 0;
3992                 }
3993                 break;
3994
3995         case TPACPI_FAN_WR_ACPI_SFAN:
3996                 rc = fan_get_status(&s);
3997                 if (rc < 0)
3998                         break;
3999
4000                 s &= 0x07;
4001
4002                 /* Set fan to at least level 4 */
4003                 s |= 4;
4004
4005                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4006                         rc= -EIO;
4007                 else
4008                         rc = 0;
4009                 break;
4010
4011         default:
4012                 rc = -ENXIO;
4013         }
4014
4015         mutex_unlock(&fan_mutex);
4016         return rc;
4017 }
4018
4019 static int fan_set_disable(void)
4020 {
4021         int rc;
4022
4023         if (!fan_control_allowed)
4024                 return -EPERM;
4025
4026         rc = mutex_lock_interruptible(&fan_mutex);
4027         if (rc < 0)
4028                 return rc;
4029
4030         rc = 0;
4031         switch (fan_control_access_mode) {
4032         case TPACPI_FAN_WR_ACPI_FANS:
4033         case TPACPI_FAN_WR_TPEC:
4034                 if (!acpi_ec_write(fan_status_offset, 0x00))
4035                         rc = -EIO;
4036                 else {
4037                         fan_control_desired_level = 0;
4038                         tp_features.fan_ctrl_status_undef = 0;
4039                 }
4040                 break;
4041
4042         case TPACPI_FAN_WR_ACPI_SFAN:
4043                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4044                         rc = -EIO;
4045                 else
4046                         fan_control_desired_level = 0;
4047                 break;
4048
4049         default:
4050                 rc = -ENXIO;
4051         }
4052
4053
4054         mutex_unlock(&fan_mutex);
4055         return rc;
4056 }
4057
4058 static int fan_set_speed(int speed)
4059 {
4060         int rc;
4061
4062         if (!fan_control_allowed)
4063                 return -EPERM;
4064
4065         rc = mutex_lock_interruptible(&fan_mutex);
4066         if (rc < 0)
4067                 return rc;
4068
4069         rc = 0;
4070         switch (fan_control_access_mode) {
4071         case TPACPI_FAN_WR_ACPI_FANS:
4072                 if (speed >= 0 && speed <= 65535) {
4073                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4074                                         speed, speed, speed))
4075                                 rc = -EIO;
4076                 } else
4077                         rc = -EINVAL;
4078                 break;
4079
4080         default:
4081                 rc = -ENXIO;
4082         }
4083
4084         mutex_unlock(&fan_mutex);
4085         return rc;
4086 }
4087
4088 static int fan_read(char *p)
4089 {
4090         int len = 0;
4091         int rc;
4092         u8 status;
4093         unsigned int speed = 0;
4094
4095         switch (fan_status_access_mode) {
4096         case TPACPI_FAN_RD_ACPI_GFAN:
4097                 /* 570, 600e/x, 770e, 770x */
4098                 if ((rc = fan_get_status_safe(&status)) < 0)
4099                         return rc;
4100
4101                 len += sprintf(p + len, "status:\t\t%s\n"
4102                                "level:\t\t%d\n",
4103                                (status != 0) ? "enabled" : "disabled", status);
4104                 break;
4105
4106         case TPACPI_FAN_RD_TPEC:
4107                 /* all except 570, 600e/x, 770e, 770x */
4108                 if ((rc = fan_get_status_safe(&status)) < 0)
4109                         return rc;
4110
4111                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4112                         if (status != fan_control_initial_status)
4113                                 tp_features.fan_ctrl_status_undef = 0;
4114                         else
4115                                 /* Return most likely status. In fact, it
4116                                  * might be the only possible status */
4117                                 status = TP_EC_FAN_AUTO;
4118                 }
4119
4120                 len += sprintf(p + len, "status:\t\t%s\n",
4121                                (status != 0) ? "enabled" : "disabled");
4122
4123                 if ((rc = fan_get_speed(&speed)) < 0)
4124                         return rc;
4125
4126                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4127
4128                 if (status & TP_EC_FAN_FULLSPEED)
4129                         /* Disengaged mode takes precedence */
4130                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4131                 else if (status & TP_EC_FAN_AUTO)
4132                         len += sprintf(p + len, "level:\t\tauto\n");
4133                 else
4134                         len += sprintf(p + len, "level:\t\t%d\n", status);
4135                 break;
4136
4137         case TPACPI_FAN_NONE:
4138         default:
4139                 len += sprintf(p + len, "status:\t\tnot supported\n");
4140         }
4141
4142         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4143                 len += sprintf(p + len, "commands:\tlevel <level>");
4144
4145                 switch (fan_control_access_mode) {
4146                 case TPACPI_FAN_WR_ACPI_SFAN:
4147                         len += sprintf(p + len, " (<level> is 0-7)\n");
4148                         break;
4149
4150                 default:
4151                         len += sprintf(p + len, " (<level> is 0-7, "
4152                                        "auto, disengaged, full-speed)\n");
4153                         break;
4154                 }
4155         }
4156
4157         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4158                 len += sprintf(p + len, "commands:\tenable, disable\n"
4159                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4160                                "1-120 (seconds))\n");
4161
4162         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4163                 len += sprintf(p + len, "commands:\tspeed <speed>"
4164                                " (<speed> is 0-65535)\n");
4165
4166         return len;
4167 }
4168
4169 static int fan_write_cmd_level(const char *cmd, int *rc)
4170 {
4171         int level;
4172
4173         if (strlencmp(cmd, "level auto") == 0)
4174                 level = TP_EC_FAN_AUTO;
4175         else if ((strlencmp(cmd, "level disengaged") == 0) |
4176                  (strlencmp(cmd, "level full-speed") == 0))
4177                 level = TP_EC_FAN_FULLSPEED;
4178         else if (sscanf(cmd, "level %d", &level) != 1)
4179                 return 0;
4180
4181         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4182                 printk(IBM_ERR "level command accepted for unsupported "
4183                        "access mode %d", fan_control_access_mode);
4184
4185         return 1;
4186 }
4187
4188 static int fan_write_cmd_enable(const char *cmd, int *rc)
4189 {
4190         if (strlencmp(cmd, "enable") != 0)
4191                 return 0;
4192
4193         if ((*rc = fan_set_enable()) == -ENXIO)
4194                 printk(IBM_ERR "enable command accepted for unsupported "
4195                        "access mode %d", fan_control_access_mode);
4196
4197         return 1;
4198 }
4199
4200 static int fan_write_cmd_disable(const char *cmd, int *rc)
4201 {
4202         if (strlencmp(cmd, "disable") != 0)
4203                 return 0;
4204
4205         if ((*rc = fan_set_disable()) == -ENXIO)
4206                 printk(IBM_ERR "disable command accepted for unsupported "
4207                        "access mode %d", fan_control_access_mode);
4208
4209         return 1;
4210 }
4211
4212 static int fan_write_cmd_speed(const char *cmd, int *rc)
4213 {
4214         int speed;
4215
4216         /* TODO:
4217          * Support speed <low> <medium> <high> ? */
4218
4219         if (sscanf(cmd, "speed %d", &speed) != 1)
4220                 return 0;
4221
4222         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4223                 printk(IBM_ERR "speed command accepted for unsupported "
4224                        "access mode %d", fan_control_access_mode);
4225
4226         return 1;
4227 }
4228
4229 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4230 {
4231         int interval;
4232
4233         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4234                 return 0;
4235
4236         if (interval < 0 || interval > 120)
4237                 *rc = -EINVAL;
4238         else
4239                 fan_watchdog_maxinterval = interval;
4240
4241         return 1;
4242 }
4243
4244 static int fan_write(char *buf)
4245 {
4246         char *cmd;
4247         int rc = 0;
4248
4249         while (!rc && (cmd = next_cmd(&buf))) {
4250                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4251                       fan_write_cmd_level(cmd, &rc)) &&
4252                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4253                       (fan_write_cmd_enable(cmd, &rc) ||
4254                        fan_write_cmd_disable(cmd, &rc) ||
4255                        fan_write_cmd_watchdog(cmd, &rc))) &&
4256                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4257                       fan_write_cmd_speed(cmd, &rc))
4258                     )
4259                         rc = -EINVAL;
4260                 else if (!rc)
4261                         fan_watchdog_reset();
4262         }
4263
4264         return rc;
4265 }
4266
4267 static struct ibm_struct fan_driver_data = {
4268         .name = "fan",
4269         .read = fan_read,
4270         .write = fan_write,
4271         .exit = fan_exit,
4272 };
4273
4274 /****************************************************************************
4275  ****************************************************************************
4276  *
4277  * Infrastructure
4278  *
4279  ****************************************************************************
4280  ****************************************************************************/
4281
4282 /* /proc support */
4283 static struct proc_dir_entry *proc_dir;
4284
4285 /* Subdriver registry */
4286 static LIST_HEAD(tpacpi_all_drivers);
4287
4288
4289 /*
4290  * Module and infrastructure proble, init and exit handling
4291  */
4292
4293 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4294 static const char * __init str_supported(int is_supported)
4295 {
4296         static char text_unsupported[] __initdata = "not supported";
4297
4298         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4299 }
4300 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4301
4302 static int __init ibm_init(struct ibm_init_struct *iibm)
4303 {
4304         int ret;
4305         struct ibm_struct *ibm = iibm->data;
4306         struct proc_dir_entry *entry;
4307
4308         BUG_ON(ibm == NULL);
4309
4310         INIT_LIST_HEAD(&ibm->all_drivers);
4311
4312         if (ibm->flags.experimental && !experimental)
4313                 return 0;
4314
4315         dbg_printk(TPACPI_DBG_INIT,
4316                 "probing for %s\n", ibm->name);
4317
4318         if (iibm->init) {
4319                 ret = iibm->init(iibm);
4320                 if (ret > 0)
4321                         return 0;       /* probe failed */
4322                 if (ret)
4323                         return ret;
4324
4325                 ibm->flags.init_called = 1;
4326         }
4327
4328         if (ibm->acpi) {
4329                 if (ibm->acpi->hid) {
4330                         ret = register_tpacpi_subdriver(ibm);
4331                         if (ret)
4332                                 goto err_out;
4333                 }
4334
4335                 if (ibm->acpi->notify) {
4336                         ret = setup_acpi_notify(ibm);
4337                         if (ret == -ENODEV) {
4338                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4339                                         ibm->name);
4340                                 ret = 0;
4341                                 goto err_out;
4342                         }
4343                         if (ret < 0)
4344                                 goto err_out;
4345                 }
4346         }
4347
4348         dbg_printk(TPACPI_DBG_INIT,
4349                 "%s installed\n", ibm->name);
4350
4351         if (ibm->read) {
4352                 entry = create_proc_entry(ibm->name,
4353                                           S_IFREG | S_IRUGO | S_IWUSR,
4354                                           proc_dir);
4355                 if (!entry) {
4356                         printk(IBM_ERR "unable to create proc entry %s\n",
4357                                ibm->name);
4358                         ret = -ENODEV;
4359                         goto err_out;
4360                 }
4361                 entry->owner = THIS_MODULE;
4362                 entry->data = ibm;
4363                 entry->read_proc = &dispatch_procfs_read;
4364                 if (ibm->write)
4365                         entry->write_proc = &dispatch_procfs_write;
4366                 ibm->flags.proc_created = 1;
4367         }
4368
4369         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4370
4371         return 0;
4372
4373 err_out:
4374         dbg_printk(TPACPI_DBG_INIT,
4375                 "%s: at error exit path with result %d\n",
4376                 ibm->name, ret);
4377
4378         ibm_exit(ibm);
4379         return (ret < 0)? ret : 0;
4380 }
4381
4382 static void ibm_exit(struct ibm_struct *ibm)
4383 {
4384         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4385
4386         list_del_init(&ibm->all_drivers);
4387
4388         if (ibm->flags.acpi_notify_installed) {
4389                 dbg_printk(TPACPI_DBG_EXIT,
4390                         "%s: acpi_remove_notify_handler\n", ibm->name);
4391                 BUG_ON(!ibm->acpi);
4392                 acpi_remove_notify_handler(*ibm->acpi->handle,
4393                                            ibm->acpi->type,
4394                                            dispatch_acpi_notify);
4395                 ibm->flags.acpi_notify_installed = 0;
4396                 ibm->flags.acpi_notify_installed = 0;
4397         }
4398
4399         if (ibm->flags.proc_created) {
4400                 dbg_printk(TPACPI_DBG_EXIT,
4401                         "%s: remove_proc_entry\n", ibm->name);
4402                 remove_proc_entry(ibm->name, proc_dir);
4403                 ibm->flags.proc_created = 0;
4404         }
4405
4406         if (ibm->flags.acpi_driver_registered) {
4407                 dbg_printk(TPACPI_DBG_EXIT,
4408                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4409                 BUG_ON(!ibm->acpi);
4410                 acpi_bus_unregister_driver(ibm->acpi->driver);
4411                 kfree(ibm->acpi->driver);
4412                 ibm->acpi->driver = NULL;
4413                 ibm->flags.acpi_driver_registered = 0;
4414         }
4415
4416         if (ibm->flags.init_called && ibm->exit) {
4417                 ibm->exit();
4418                 ibm->flags.init_called = 0;
4419         }
4420
4421         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4422 }
4423
4424 /* Probing */
4425
4426 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4427 {
4428         struct dmi_device *dev = NULL;
4429         char ec_fw_string[18];
4430
4431         if (!tp)
4432                 return;
4433
4434         memset(tp, 0, sizeof(*tp));
4435
4436         if (dmi_name_in_vendors("IBM"))
4437                 tp->vendor = PCI_VENDOR_ID_IBM;
4438         else if (dmi_name_in_vendors("LENOVO"))
4439                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4440         else
4441                 return;
4442
4443         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4444                                         GFP_KERNEL);
4445         if (!tp->bios_version_str)
4446                 return;
4447         tp->bios_model = tp->bios_version_str[0]
4448                          | (tp->bios_version_str[1] << 8);
4449
4450         /*
4451          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4452          * X32 or newer, all Z series;  Some models must have an
4453          * up-to-date BIOS or they will not be detected.
4454          *
4455          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4456          */
4457         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4458                 if (sscanf(dev->name,
4459                            "IBM ThinkPad Embedded Controller -[%17c",
4460                            ec_fw_string) == 1) {
4461                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4462                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4463
4464                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4465                         tp->ec_model = ec_fw_string[0]
4466                                         | (ec_fw_string[1] << 8);
4467                         break;
4468                 }
4469         }
4470
4471         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4472                                         GFP_KERNEL);
4473         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4474                 kfree(tp->model_str);
4475                 tp->model_str = NULL;
4476         }
4477 }
4478
4479 static int __init probe_for_thinkpad(void)
4480 {
4481         int is_thinkpad;
4482
4483         if (acpi_disabled)
4484                 return -ENODEV;
4485
4486         /*
4487          * Non-ancient models have better DMI tagging, but very old models
4488          * don't.
4489          */
4490         is_thinkpad = (thinkpad_id.model_str != NULL);
4491
4492         /* ec is required because many other handles are relative to it */
4493         IBM_ACPIHANDLE_INIT(ec);
4494         if (!ec_handle) {
4495                 if (is_thinkpad)
4496                         printk(IBM_ERR
4497                                 "Not yet supported ThinkPad detected!\n");
4498                 return -ENODEV;
4499         }
4500
4501         /*
4502          * Risks a regression on very old machines, but reduces potential
4503          * false positives a damn great deal
4504          */
4505         if (!is_thinkpad)
4506                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4507
4508         if (!is_thinkpad && !force_load)
4509                 return -ENODEV;
4510
4511         return 0;
4512 }
4513
4514
4515 /* Module init, exit, parameters */
4516
4517 static struct ibm_init_struct ibms_init[] __initdata = {
4518         {
4519                 .init = thinkpad_acpi_driver_init,
4520                 .data = &thinkpad_acpi_driver_data,
4521         },
4522         {
4523                 .init = hotkey_init,
4524                 .data = &hotkey_driver_data,
4525         },
4526         {
4527                 .init = bluetooth_init,
4528                 .data = &bluetooth_driver_data,
4529         },
4530         {
4531                 .init = wan_init,
4532                 .data = &wan_driver_data,
4533         },
4534         {
4535                 .init = video_init,
4536                 .data = &video_driver_data,
4537         },
4538         {
4539                 .init = light_init,
4540                 .data = &light_driver_data,
4541         },
4542 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4543         {
4544                 .init = dock_init,
4545                 .data = &dock_driver_data[0],
4546         },
4547         {
4548                 .init = dock_init2,
4549                 .data = &dock_driver_data[1],
4550         },
4551 #endif
4552 #ifdef CONFIG_THINKPAD_ACPI_BAY
4553         {
4554                 .init = bay_init,
4555                 .data = &bay_driver_data,
4556         },
4557 #endif
4558         {
4559                 .init = cmos_init,
4560                 .data = &cmos_driver_data,
4561         },
4562         {
4563                 .init = led_init,
4564                 .data = &led_driver_data,
4565         },
4566         {
4567                 .init = beep_init,
4568                 .data = &beep_driver_data,
4569         },
4570         {
4571                 .init = thermal_init,
4572                 .data = &thermal_driver_data,
4573         },
4574         {
4575                 .data = &ecdump_driver_data,
4576         },
4577         {
4578                 .init = brightness_init,
4579                 .data = &brightness_driver_data,
4580         },
4581         {
4582                 .data = &volume_driver_data,
4583         },
4584         {
4585                 .init = fan_init,
4586                 .data = &fan_driver_data,
4587         },
4588 };
4589
4590 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4591 {
4592         unsigned int i;
4593         struct ibm_struct *ibm;
4594
4595         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4596                 ibm = ibms_init[i].data;
4597                 BUG_ON(ibm == NULL);
4598
4599                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4600                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4601                                 return -ENOSPC;
4602                         strcpy(ibms_init[i].param, val);
4603                         strcat(ibms_init[i].param, ",");
4604                         return 0;
4605                 }
4606         }
4607
4608         return -EINVAL;
4609 }
4610
4611 static int experimental;
4612 module_param(experimental, int, 0);
4613
4614 static u32 dbg_level;
4615 module_param_named(debug, dbg_level, uint, 0);
4616
4617 static int force_load;
4618 module_param(force_load, bool, 0);
4619
4620 static int fan_control_allowed;
4621 module_param_named(fan_control, fan_control_allowed, bool, 0);
4622
4623 static int brightness_mode;
4624 module_param_named(brightness_mode, brightness_mode, int, 0);
4625
4626 #define IBM_PARAM(feature) \
4627         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4628
4629 IBM_PARAM(hotkey);
4630 IBM_PARAM(bluetooth);
4631 IBM_PARAM(video);
4632 IBM_PARAM(light);
4633 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4634 IBM_PARAM(dock);
4635 #endif
4636 #ifdef CONFIG_THINKPAD_ACPI_BAY
4637 IBM_PARAM(bay);
4638 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4639 IBM_PARAM(cmos);
4640 IBM_PARAM(led);
4641 IBM_PARAM(beep);
4642 IBM_PARAM(ecdump);
4643 IBM_PARAM(brightness);
4644 IBM_PARAM(volume);
4645 IBM_PARAM(fan);
4646
4647 static int __init thinkpad_acpi_module_init(void)
4648 {
4649         int ret, i;
4650
4651         /* Driver-level probe */
4652
4653         get_thinkpad_model_data(&thinkpad_id);
4654         ret = probe_for_thinkpad();
4655         if (ret) {
4656                 thinkpad_acpi_module_exit();
4657                 return ret;
4658         }
4659
4660         /* Driver initialization */
4661
4662         IBM_ACPIHANDLE_INIT(ecrd);
4663         IBM_ACPIHANDLE_INIT(ecwr);
4664
4665         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4666         if (!proc_dir) {
4667                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4668                 thinkpad_acpi_module_exit();
4669                 return -ENODEV;
4670         }
4671         proc_dir->owner = THIS_MODULE;
4672
4673         ret = platform_driver_register(&tpacpi_pdriver);
4674         if (ret) {
4675                 printk(IBM_ERR "unable to register platform driver\n");
4676                 thinkpad_acpi_module_exit();
4677                 return ret;
4678         }
4679         tp_features.platform_drv_registered = 1;
4680
4681         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4682         if (ret) {
4683                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4684                 thinkpad_acpi_module_exit();
4685                 return ret;
4686         }
4687         tp_features.platform_drv_attrs_registered = 1;
4688
4689
4690         /* Device initialization */
4691         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4692                                                         NULL, 0);
4693         if (IS_ERR(tpacpi_pdev)) {
4694                 ret = PTR_ERR(tpacpi_pdev);
4695                 tpacpi_pdev = NULL;
4696                 printk(IBM_ERR "unable to register platform device\n");
4697                 thinkpad_acpi_module_exit();
4698                 return ret;
4699         }
4700         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4701         if (IS_ERR(tpacpi_hwmon)) {
4702                 ret = PTR_ERR(tpacpi_hwmon);
4703                 tpacpi_hwmon = NULL;
4704                 printk(IBM_ERR "unable to register hwmon device\n");
4705                 thinkpad_acpi_module_exit();
4706                 return ret;
4707         }
4708         tpacpi_inputdev = input_allocate_device();
4709         if (!tpacpi_inputdev) {
4710                 printk(IBM_ERR "unable to allocate input device\n");
4711                 thinkpad_acpi_module_exit();
4712                 return -ENOMEM;
4713         } else {
4714                 /* Prepare input device, but don't register */
4715                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4716                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4717                 tpacpi_inputdev->id.bustype = BUS_HOST;
4718                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4719                                                 thinkpad_id.vendor :
4720                                                 PCI_VENDOR_ID_IBM;
4721                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4722                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4723         }
4724         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4725                 ret = ibm_init(&ibms_init[i]);
4726                 if (ret >= 0 && *ibms_init[i].param)
4727                         ret = ibms_init[i].data->write(ibms_init[i].param);
4728                 if (ret < 0) {
4729                         thinkpad_acpi_module_exit();
4730                         return ret;
4731                 }
4732         }
4733         ret = input_register_device(tpacpi_inputdev);
4734         if (ret < 0) {
4735                 printk(IBM_ERR "unable to register input device\n");
4736                 thinkpad_acpi_module_exit();
4737                 return ret;
4738         } else {
4739                 tp_features.input_device_registered = 1;
4740         }
4741
4742         return 0;
4743 }
4744
4745 static void thinkpad_acpi_module_exit(void)
4746 {
4747         struct ibm_struct *ibm, *itmp;
4748
4749         list_for_each_entry_safe_reverse(ibm, itmp,
4750                                          &tpacpi_all_drivers,
4751                                          all_drivers) {
4752                 ibm_exit(ibm);
4753         }
4754
4755         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4756
4757         if (tpacpi_inputdev) {
4758                 if (tp_features.input_device_registered)
4759                         input_unregister_device(tpacpi_inputdev);
4760                 else
4761                         input_free_device(tpacpi_inputdev);
4762         }
4763
4764         if (tpacpi_hwmon)
4765                 hwmon_device_unregister(tpacpi_hwmon);
4766
4767         if (tpacpi_pdev)
4768                 platform_device_unregister(tpacpi_pdev);
4769
4770         if (tp_features.platform_drv_attrs_registered)
4771                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4772
4773         if (tp_features.platform_drv_registered)
4774                 platform_driver_unregister(&tpacpi_pdriver);
4775
4776         if (proc_dir)
4777                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4778
4779         kfree(thinkpad_id.bios_version_str);
4780         kfree(thinkpad_id.ec_version_str);
4781         kfree(thinkpad_id.model_str);
4782 }
4783
4784 module_init(thinkpad_acpi_module_init);
4785 module_exit(thinkpad_acpi_module_exit);