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