git.oblomov.eu Git - linux-2.6/blob - drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.14"
  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 && experimental) {
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                         *value = t * 1000;
2857                         return 0;
2858                 }
2859                 break;
2860
2861         case TPACPI_THERMAL_NONE:
2862         default:
2863                 return -ENOSYS;
2864         }
2865
2866         return -EINVAL;
2867 }
2868
2869 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2870 {
2871         int res, i;
2872         int n;
2873
2874         n = 8;
2875         i = 0;
2876
2877         if (!s)
2878                 return -EINVAL;
2879
2880         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2881                 n = 16;
2882
2883         for(i = 0 ; i < n; i++) {
2884                 res = thermal_get_sensor(i, &s->temp[i]);
2885                 if (res)
2886                         return res;
2887         }
2888
2889         return n;
2890 }
2891
2892 static int thermal_read(char *p)
2893 {
2894         int len = 0;
2895         int n, i;
2896         struct ibm_thermal_sensors_struct t;
2897
2898         n = thermal_get_sensors(&t);
2899         if (unlikely(n < 0))
2900                 return n;
2901
2902         len += sprintf(p + len, "temperatures:\t");
2903
2904         if (n > 0) {
2905                 for (i = 0; i < (n - 1); i++)
2906                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2907                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2908         } else
2909                 len += sprintf(p + len, "not supported\n");
2910
2911         return len;
2912 }
2913
2914 static struct ibm_struct thermal_driver_data = {
2915         .name = "thermal",
2916         .read = thermal_read,
2917         .exit = thermal_exit,
2918 };
2919
2920 /*************************************************************************
2921  * EC Dump subdriver
2922  */
2923
2924 static u8 ecdump_regs[256];
2925
2926 static int ecdump_read(char *p)
2927 {
2928         int len = 0;
2929         int i, j;
2930         u8 v;
2931
2932         len += sprintf(p + len, "EC      "
2933                        " +00 +01 +02 +03 +04 +05 +06 +07"
2934                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2935         for (i = 0; i < 256; i += 16) {
2936                 len += sprintf(p + len, "EC 0x%02x:", i);
2937                 for (j = 0; j < 16; j++) {
2938                         if (!acpi_ec_read(i + j, &v))
2939                                 break;
2940                         if (v != ecdump_regs[i + j])
2941                                 len += sprintf(p + len, " *%02x", v);
2942                         else
2943                                 len += sprintf(p + len, "  %02x", v);
2944                         ecdump_regs[i + j] = v;
2945                 }
2946                 len += sprintf(p + len, "\n");
2947                 if (j != 16)
2948                         break;
2949         }
2950
2951         /* These are way too dangerous to advertise openly... */
2952 #if 0
2953         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2954                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2955         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2956                        " (<offset> is 00-ff, <value> is 0-255)\n");
2957 #endif
2958         return len;
2959 }
2960
2961 static int ecdump_write(char *buf)
2962 {
2963         char *cmd;
2964         int i, v;
2965
2966         while ((cmd = next_cmd(&buf))) {
2967                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2968                         /* i and v set */
2969                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2970                         /* i and v set */
2971                 } else
2972                         return -EINVAL;
2973                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2974                         if (!acpi_ec_write(i, v))
2975                                 return -EIO;
2976                 } else
2977                         return -EINVAL;
2978         }
2979
2980         return 0;
2981 }
2982
2983 static struct ibm_struct ecdump_driver_data = {
2984         .name = "ecdump",
2985         .read = ecdump_read,
2986         .write = ecdump_write,
2987         .flags.experimental = 1,
2988 };
2989
2990 /*************************************************************************
2991  * Backlight/brightness subdriver
2992  */
2993
2994 static struct backlight_device *ibm_backlight_device;
2995
2996 static struct backlight_ops ibm_backlight_data = {
2997         .get_brightness = brightness_get,
2998         .update_status  = brightness_update_status,
2999 };
3000
3001 static int __init brightness_init(struct ibm_init_struct *iibm)
3002 {
3003         int b;
3004
3005         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3006
3007         if (!brightness_mode) {
3008                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3009                         brightness_mode = 2;
3010                 else
3011                         brightness_mode = 3;
3012
3013                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3014                         brightness_mode);
3015         }
3016
3017         if (brightness_mode > 3)
3018                 return -EINVAL;
3019
3020         b = brightness_get(NULL);
3021         if (b < 0)
3022                 return 1;
3023
3024         ibm_backlight_device = backlight_device_register(
3025                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3026                                         &ibm_backlight_data);
3027         if (IS_ERR(ibm_backlight_device)) {
3028                 printk(IBM_ERR "Could not register backlight device\n");
3029                 return PTR_ERR(ibm_backlight_device);
3030         }
3031         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3032
3033         ibm_backlight_device->props.max_brightness = 7;
3034         ibm_backlight_device->props.brightness = b;
3035         backlight_update_status(ibm_backlight_device);
3036
3037         return 0;
3038 }
3039
3040 static void brightness_exit(void)
3041 {
3042         if (ibm_backlight_device) {
3043                 vdbg_printk(TPACPI_DBG_EXIT,
3044                             "calling backlight_device_unregister()\n");
3045                 backlight_device_unregister(ibm_backlight_device);
3046                 ibm_backlight_device = NULL;
3047         }
3048 }
3049
3050 static int brightness_update_status(struct backlight_device *bd)
3051 {
3052         return brightness_set(
3053                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3054                  bd->props.power == FB_BLANK_UNBLANK) ?
3055                                 bd->props.brightness : 0);
3056 }
3057
3058 /*
3059  * ThinkPads can read brightness from two places: EC 0x31, or
3060  * CMOS NVRAM byte 0x5E, bits 0-3.
3061  */
3062 static int brightness_get(struct backlight_device *bd)
3063 {
3064         u8 lec = 0, lcmos = 0, level = 0;
3065
3066         if (brightness_mode & 1) {
3067                 if (!acpi_ec_read(brightness_offset, &lec))
3068                         return -EIO;
3069                 lec &= 7;
3070                 level = lec;
3071         };
3072         if (brightness_mode & 2) {
3073                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3074                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3075                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3076                 level = lcmos;
3077         }
3078
3079         if (brightness_mode == 3 && lec != lcmos) {
3080                 printk(IBM_ERR
3081                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3082                         "on display brightness level\n",
3083                         (unsigned int) lcmos,
3084                         (unsigned int) lec);
3085                 return -EIO;
3086         }
3087
3088         return level;
3089 }
3090
3091 static int brightness_set(int value)
3092 {
3093         int cmos_cmd, inc, i;
3094         int current_value = brightness_get(NULL);
3095
3096         if (value > 7)
3097                 return -EINVAL;
3098
3099         cmos_cmd = value > current_value ?
3100                         TP_CMOS_BRIGHTNESS_UP :
3101                         TP_CMOS_BRIGHTNESS_DOWN;
3102         inc = value > current_value ? 1 : -1;
3103
3104         for (i = current_value; i != value; i += inc) {
3105                 if ((brightness_mode & 2) &&
3106                     issue_thinkpad_cmos_command(cmos_cmd))
3107                         return -EIO;
3108                 if ((brightness_mode & 1) &&
3109                     !acpi_ec_write(brightness_offset, i + inc))
3110                         return -EIO;
3111         }
3112
3113         return 0;
3114 }
3115
3116 static int brightness_read(char *p)
3117 {
3118         int len = 0;
3119         int level;
3120
3121         if ((level = brightness_get(NULL)) < 0) {
3122                 len += sprintf(p + len, "level:\t\tunreadable\n");
3123         } else {
3124                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3125                 len += sprintf(p + len, "commands:\tup, down\n");
3126                 len += sprintf(p + len, "commands:\tlevel <level>"
3127                                " (<level> is 0-7)\n");
3128         }
3129
3130         return len;
3131 }
3132
3133 static int brightness_write(char *buf)
3134 {
3135         int level;
3136         int new_level;
3137         char *cmd;
3138
3139         while ((cmd = next_cmd(&buf))) {
3140                 if ((level = brightness_get(NULL)) < 0)
3141                         return level;
3142                 level &= 7;
3143
3144                 if (strlencmp(cmd, "up") == 0) {
3145                         new_level = level == 7 ? 7 : level + 1;
3146                 } else if (strlencmp(cmd, "down") == 0) {
3147                         new_level = level == 0 ? 0 : level - 1;
3148                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3149                            new_level >= 0 && new_level <= 7) {
3150                         /* new_level set */
3151                 } else
3152                         return -EINVAL;
3153
3154                 brightness_set(new_level);
3155         }
3156
3157         return 0;
3158 }
3159
3160 static struct ibm_struct brightness_driver_data = {
3161         .name = "brightness",
3162         .read = brightness_read,
3163         .write = brightness_write,
3164         .exit = brightness_exit,
3165 };
3166
3167 /*************************************************************************
3168  * Volume subdriver
3169  */
3170
3171 static int volume_read(char *p)
3172 {
3173         int len = 0;
3174         u8 level;
3175
3176         if (!acpi_ec_read(volume_offset, &level)) {
3177                 len += sprintf(p + len, "level:\t\tunreadable\n");
3178         } else {
3179                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3180                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3181                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3182                 len += sprintf(p + len, "commands:\tlevel <level>"
3183                                " (<level> is 0-15)\n");
3184         }
3185
3186         return len;
3187 }
3188
3189 static int volume_write(char *buf)
3190 {
3191         int cmos_cmd, inc, i;
3192         u8 level, mute;
3193         int new_level, new_mute;
3194         char *cmd;
3195
3196         while ((cmd = next_cmd(&buf))) {
3197                 if (!acpi_ec_read(volume_offset, &level))
3198                         return -EIO;
3199                 new_mute = mute = level & 0x40;
3200                 new_level = level = level & 0xf;
3201
3202                 if (strlencmp(cmd, "up") == 0) {
3203                         if (mute)
3204                                 new_mute = 0;
3205                         else
3206                                 new_level = level == 15 ? 15 : level + 1;
3207                 } else if (strlencmp(cmd, "down") == 0) {
3208                         if (mute)
3209                                 new_mute = 0;
3210                         else
3211                                 new_level = level == 0 ? 0 : level - 1;
3212                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3213                            new_level >= 0 && new_level <= 15) {
3214                         /* new_level set */
3215                 } else if (strlencmp(cmd, "mute") == 0) {
3216                         new_mute = 0x40;
3217                 } else
3218                         return -EINVAL;
3219
3220                 if (new_level != level) {       /* mute doesn't change */
3221                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3222                         inc = new_level > level ? 1 : -1;
3223
3224                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3225                                      !acpi_ec_write(volume_offset, level)))
3226                                 return -EIO;
3227
3228                         for (i = level; i != new_level; i += inc)
3229                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3230                                     !acpi_ec_write(volume_offset, i + inc))
3231                                         return -EIO;
3232
3233                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3234                                      !acpi_ec_write(volume_offset,
3235                                                     new_level + mute)))
3236                                 return -EIO;
3237                 }
3238
3239                 if (new_mute != mute) { /* level doesn't change */
3240                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3241
3242                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3243                             !acpi_ec_write(volume_offset, level + new_mute))
3244                                 return -EIO;
3245                 }
3246         }
3247
3248         return 0;
3249 }
3250
3251 static struct ibm_struct volume_driver_data = {
3252         .name = "volume",
3253         .read = volume_read,
3254         .write = volume_write,
3255 };
3256
3257 /*************************************************************************
3258  * Fan subdriver
3259  */
3260
3261 /*
3262  * FAN ACCESS MODES
3263  *
3264  * TPACPI_FAN_RD_ACPI_GFAN:
3265  *      ACPI GFAN method: returns fan level
3266  *
3267  *      see TPACPI_FAN_WR_ACPI_SFAN
3268  *      EC 0x2f (HFSP) not available if GFAN exists
3269  *
3270  * TPACPI_FAN_WR_ACPI_SFAN:
3271  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3272  *
3273  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3274  *      it for writing.
3275  *
3276  * TPACPI_FAN_WR_TPEC:
3277  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3278  *      Supported on almost all ThinkPads
3279  *
3280  *      Fan speed changes of any sort (including those caused by the
3281  *      disengaged mode) are usually done slowly by the firmware as the
3282  *      maximum ammount of fan duty cycle change per second seems to be
3283  *      limited.
3284  *
3285  *      Reading is not available if GFAN exists.
3286  *      Writing is not available if SFAN exists.
3287  *
3288  *      Bits
3289  *       7      automatic mode engaged;
3290  *              (default operation mode of the ThinkPad)
3291  *              fan level is ignored in this mode.
3292  *       6      full speed mode (takes precedence over bit 7);
3293  *              not available on all thinkpads.  May disable
3294  *              the tachometer while the fan controller ramps up
3295  *              the speed (which can take up to a few *minutes*).
3296  *              Speeds up fan to 100% duty-cycle, which is far above
3297  *              the standard RPM levels.  It is not impossible that
3298  *              it could cause hardware damage.
3299  *      5-3     unused in some models.  Extra bits for fan level
3300  *              in others, but still useless as all values above
3301  *              7 map to the same speed as level 7 in these models.
3302  *      2-0     fan level (0..7 usually)
3303  *                      0x00 = stop
3304  *                      0x07 = max (set when temperatures critical)
3305  *              Some ThinkPads may have other levels, see
3306  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3307  *
3308  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3309  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3310  *      does so, its initial value is meaningless (0x07).
3311  *
3312  *      For firmware bugs, refer to:
3313  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3314  *
3315  *      ----
3316  *
3317  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3318  *      Main fan tachometer reading (in RPM)
3319  *
3320  *      This register is present on all ThinkPads with a new-style EC, and
3321  *      it is known not to be present on the A21m/e, and T22, as there is
3322  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3323  *      ThinkPads from this same time period (and earlier) probably lack the
3324  *      tachometer as well.
3325  *
3326  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3327  *      was never fixed by IBM to report the EC firmware version string
3328  *      probably support the tachometer (like the early X models), so
3329  *      detecting it is quite hard.  We need more data to know for sure.
3330  *
3331  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3332  *      might result.
3333  *
3334  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3335  *      mode.
3336  *
3337  *      For firmware bugs, refer to:
3338  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3339  *
3340  * TPACPI_FAN_WR_ACPI_FANS:
3341  *      ThinkPad X31, X40, X41.  Not available in the X60.
3342  *
3343  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3344  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3345  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3346  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3347  *
3348  *      The speeds are stored on handles
3349  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3350  *
3351  *      There are three default speed sets, acessible as handles:
3352  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3353  *
3354  *      ACPI DSDT switches which set is in use depending on various
3355  *      factors.
3356  *
3357  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3358  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3359  *      but the ACPI tables just mention level 7.
3360  */
3361
3362 static enum fan_status_access_mode fan_status_access_mode;
3363 static enum fan_control_access_mode fan_control_access_mode;
3364 static enum fan_control_commands fan_control_commands;
3365
3366 static u8 fan_control_initial_status;
3367 static u8 fan_control_desired_level;
3368
3369 static void fan_watchdog_fire(struct work_struct *ignored);
3370 static int fan_watchdog_maxinterval;
3371 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3372
3373 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3374 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3375            "\\FSPD",            /* 600e/x, 770e, 770x */
3376            );                   /* all others */
3377 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3378            "JFNS",              /* 770x-JL */
3379            );                   /* all others */
3380
3381 /*
3382  * SYSFS fan layout: hwmon compatible (device)
3383  *
3384  * pwm*_enable:
3385  *      0: "disengaged" mode
3386  *      1: manual mode
3387  *      2: native EC "auto" mode (recommended, hardware default)
3388  *
3389  * pwm*: set speed in manual mode, ignored otherwise.
3390  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3391  *      interpolation.
3392  *
3393  * fan*_input: tachometer reading, RPM
3394  *
3395  *
3396  * SYSFS fan layout: extensions
3397  *
3398  * fan_watchdog (driver):
3399  *      fan watchdog interval in seconds, 0 disables (default), max 120
3400  */
3401
3402 /* sysfs fan pwm1_enable ----------------------------------------------- */
3403 static ssize_t fan_pwm1_enable_show(struct device *dev,
3404                                     struct device_attribute *attr,
3405                                     char *buf)
3406 {
3407         int res, mode;
3408         u8 status;
3409
3410         res = fan_get_status_safe(&status);
3411         if (res)
3412                 return res;
3413
3414         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3415                 if (status != fan_control_initial_status) {
3416                         tp_features.fan_ctrl_status_undef = 0;
3417                 } else {
3418                         /* Return most likely status. In fact, it
3419                          * might be the only possible status */
3420                         status = TP_EC_FAN_AUTO;
3421                 }
3422         }
3423
3424         if (status & TP_EC_FAN_FULLSPEED) {
3425                 mode = 0;
3426         } else if (status & TP_EC_FAN_AUTO) {
3427                 mode = 2;
3428         } else
3429                 mode = 1;
3430
3431         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3432 }
3433
3434 static ssize_t fan_pwm1_enable_store(struct device *dev,
3435                                      struct device_attribute *attr,
3436                                      const char *buf, size_t count)
3437 {
3438         unsigned long t;
3439         int res, level;
3440
3441         if (parse_strtoul(buf, 2, &t))
3442                 return -EINVAL;
3443
3444         switch (t) {
3445         case 0:
3446                 level = TP_EC_FAN_FULLSPEED;
3447                 break;
3448         case 1:
3449                 level = TPACPI_FAN_LAST_LEVEL;
3450                 break;
3451         case 2:
3452                 level = TP_EC_FAN_AUTO;
3453                 break;
3454         case 3:
3455                 /* reserved for software-controlled auto mode */
3456                 return -ENOSYS;
3457         default:
3458                 return -EINVAL;
3459         }
3460
3461         res = fan_set_level_safe(level);
3462         if (res == -ENXIO)
3463                 return -EINVAL;
3464         else if (res < 0)
3465                 return res;
3466
3467         fan_watchdog_reset();
3468
3469         return count;
3470 }
3471
3472 static struct device_attribute dev_attr_fan_pwm1_enable =
3473         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3474                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3475
3476 /* sysfs fan pwm1 ------------------------------------------------------ */
3477 static ssize_t fan_pwm1_show(struct device *dev,
3478                              struct device_attribute *attr,
3479                              char *buf)
3480 {
3481         int res;
3482         u8 status;
3483
3484         res = fan_get_status_safe(&status);
3485         if (res)
3486                 return res;
3487
3488         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3489                 if (status != fan_control_initial_status) {
3490                         tp_features.fan_ctrl_status_undef = 0;
3491                 } else {
3492                         status = TP_EC_FAN_AUTO;
3493                 }
3494         }
3495
3496         if ((status &
3497              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3498                 status = fan_control_desired_level;
3499
3500         if (status > 7)
3501                 status = 7;
3502
3503         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3504 }
3505
3506 static ssize_t fan_pwm1_store(struct device *dev,
3507                               struct device_attribute *attr,
3508                               const char *buf, size_t count)
3509 {
3510         unsigned long s;
3511         int rc;
3512         u8 status, newlevel;
3513
3514         if (parse_strtoul(buf, 255, &s))
3515                 return -EINVAL;
3516
3517         /* scale down from 0-255 to 0-7 */
3518         newlevel = (s >> 5) & 0x07;
3519
3520         rc = mutex_lock_interruptible(&fan_mutex);
3521         if (rc < 0)
3522                 return rc;
3523
3524         rc = fan_get_status(&status);
3525         if (!rc && (status &
3526                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3527                 rc = fan_set_level(newlevel);
3528                 if (rc == -ENXIO)
3529                         rc = -EINVAL;
3530                 else if (!rc) {
3531                         fan_update_desired_level(newlevel);
3532                         fan_watchdog_reset();
3533                 }
3534         }
3535
3536         mutex_unlock(&fan_mutex);
3537         return (rc)? rc : count;
3538 }
3539
3540 static struct device_attribute dev_attr_fan_pwm1 =
3541         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3542                 fan_pwm1_show, fan_pwm1_store);
3543
3544 /* sysfs fan fan1_input ------------------------------------------------ */
3545 static ssize_t fan_fan1_input_show(struct device *dev,
3546                            struct device_attribute *attr,
3547                            char *buf)
3548 {
3549         int res;
3550         unsigned int speed;
3551
3552         res = fan_get_speed(&speed);
3553         if (res < 0)
3554                 return res;
3555
3556         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3557 }
3558
3559 static struct device_attribute dev_attr_fan_fan1_input =
3560         __ATTR(fan1_input, S_IRUGO,
3561                 fan_fan1_input_show, NULL);
3562
3563 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3564 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3565                                      char *buf)
3566 {
3567         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3568 }
3569
3570 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3571                                       const char *buf, size_t count)
3572 {
3573         unsigned long t;
3574
3575         if (parse_strtoul(buf, 120, &t))
3576                 return -EINVAL;
3577
3578         if (!fan_control_allowed)
3579                 return -EPERM;
3580
3581         fan_watchdog_maxinterval = t;
3582         fan_watchdog_reset();
3583
3584         return count;
3585 }
3586
3587 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3588                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3589
3590 /* --------------------------------------------------------------------- */
3591 static struct attribute *fan_attributes[] = {
3592         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3593         &dev_attr_fan_fan1_input.attr,
3594         NULL
3595 };
3596
3597 static const struct attribute_group fan_attr_group = {
3598         .attrs = fan_attributes,
3599 };
3600
3601 static int __init fan_init(struct ibm_init_struct *iibm)
3602 {
3603         int rc;
3604
3605         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3606
3607         mutex_init(&fan_mutex);
3608         fan_status_access_mode = TPACPI_FAN_NONE;
3609         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3610         fan_control_commands = 0;
3611         fan_watchdog_maxinterval = 0;
3612         tp_features.fan_ctrl_status_undef = 0;
3613         fan_control_desired_level = 7;
3614
3615         IBM_ACPIHANDLE_INIT(fans);
3616         IBM_ACPIHANDLE_INIT(gfan);
3617         IBM_ACPIHANDLE_INIT(sfan);
3618
3619         if (gfan_handle) {
3620                 /* 570, 600e/x, 770e, 770x */
3621                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3622         } else {
3623                 /* all other ThinkPads: note that even old-style
3624                  * ThinkPad ECs supports the fan control register */
3625                 if (likely(acpi_ec_read(fan_status_offset,
3626                                         &fan_control_initial_status))) {
3627                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3628
3629                         /* In some ThinkPads, neither the EC nor the ACPI
3630                          * DSDT initialize the fan status, and it ends up
3631                          * being set to 0x07 when it *could* be either
3632                          * 0x07 or 0x80.
3633                          *
3634                          * Enable for TP-1Y (T43), TP-78 (R51e),
3635                          * TP-76 (R52), TP-70 (T43, R52), which are known
3636                          * to be buggy. */
3637                         if (fan_control_initial_status == 0x07) {
3638                                 switch (thinkpad_id.ec_model) {
3639                                 case 0x5931: /* TP-1Y */
3640                                 case 0x3837: /* TP-78 */
3641                                 case 0x3637: /* TP-76 */
3642                                 case 0x3037: /* TP-70 */
3643                                         printk(IBM_NOTICE
3644                                                "fan_init: initial fan status is "
3645                                                "unknown, assuming it is in auto "
3646                                                "mode\n");
3647                                         tp_features.fan_ctrl_status_undef = 1;
3648                                         ;;
3649                                 }
3650                         }
3651                 } else {
3652                         printk(IBM_ERR
3653                                "ThinkPad ACPI EC access misbehaving, "
3654                                "fan status and control unavailable\n");
3655                         return 1;
3656                 }
3657         }
3658
3659         if (sfan_handle) {
3660                 /* 570, 770x-JL */
3661                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3662                 fan_control_commands |=
3663                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3664         } else {
3665                 if (!gfan_handle) {
3666                         /* gfan without sfan means no fan control */
3667                         /* all other models implement TP EC 0x2f control */
3668
3669                         if (fans_handle) {
3670                                 /* X31, X40, X41 */
3671                                 fan_control_access_mode =
3672                                     TPACPI_FAN_WR_ACPI_FANS;
3673                                 fan_control_commands |=
3674                                     TPACPI_FAN_CMD_SPEED |
3675                                     TPACPI_FAN_CMD_LEVEL |
3676                                     TPACPI_FAN_CMD_ENABLE;
3677                         } else {
3678                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3679                                 fan_control_commands |=
3680                                     TPACPI_FAN_CMD_LEVEL |
3681                                     TPACPI_FAN_CMD_ENABLE;
3682                         }
3683                 }
3684         }
3685
3686         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3687                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3688                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3689                 fan_status_access_mode, fan_control_access_mode);
3690
3691         /* fan control master switch */
3692         if (!fan_control_allowed) {
3693                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3694                 fan_control_commands = 0;
3695                 dbg_printk(TPACPI_DBG_INIT,
3696                            "fan control features disabled by parameter\n");
3697         }
3698
3699         /* update fan_control_desired_level */
3700         if (fan_status_access_mode != TPACPI_FAN_NONE)
3701                 fan_get_status_safe(NULL);
3702
3703         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3704             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3705                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3706                                          &fan_attr_group);
3707                 if (!(rc < 0))
3708                         rc = driver_create_file(&tpacpi_pdriver.driver,
3709                                         &driver_attr_fan_watchdog);
3710                 if (rc < 0)
3711                         return rc;
3712                 return 0;
3713         } else
3714                 return 1;
3715 }
3716
3717 /*
3718  * Call with fan_mutex held
3719  */
3720 static void fan_update_desired_level(u8 status)
3721 {
3722         if ((status &
3723              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3724                 if (status > 7)
3725                         fan_control_desired_level = 7;
3726                 else
3727                         fan_control_desired_level = status;
3728         }
3729 }
3730
3731 static int fan_get_status(u8 *status)
3732 {
3733         u8 s;
3734
3735         /* TODO:
3736          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3737
3738         switch (fan_status_access_mode) {
3739         case TPACPI_FAN_RD_ACPI_GFAN:
3740                 /* 570, 600e/x, 770e, 770x */
3741
3742                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3743                         return -EIO;
3744
3745                 if (likely(status))
3746                         *status = s & 0x07;
3747
3748                 break;
3749
3750         case TPACPI_FAN_RD_TPEC:
3751                 /* all except 570, 600e/x, 770e, 770x */
3752                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3753                         return -EIO;
3754
3755                 if (likely(status))
3756                         *status = s;
3757
3758                 break;
3759
3760         default:
3761                 return -ENXIO;
3762         }
3763
3764         return 0;
3765 }
3766
3767 static int fan_get_status_safe(u8 *status)
3768 {
3769         int rc;
3770         u8 s;
3771
3772         rc = mutex_lock_interruptible(&fan_mutex);
3773         if (rc < 0)
3774                 return rc;
3775         rc = fan_get_status(&s);
3776         if (!rc)
3777                 fan_update_desired_level(s);
3778         mutex_unlock(&fan_mutex);
3779
3780         if (status)
3781                 *status = s;
3782
3783         return rc;
3784 }
3785
3786 static void fan_exit(void)
3787 {
3788         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3789
3790         /* FIXME: can we really do this unconditionally? */
3791         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3792         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3793
3794         cancel_delayed_work(&fan_watchdog_task);
3795         flush_scheduled_work();
3796 }
3797
3798 static int fan_get_speed(unsigned int *speed)
3799 {
3800         u8 hi, lo;
3801
3802         switch (fan_status_access_mode) {
3803         case TPACPI_FAN_RD_TPEC:
3804                 /* all except 570, 600e/x, 770e, 770x */
3805                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3806                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3807                         return -EIO;
3808
3809                 if (likely(speed))
3810                         *speed = (hi << 8) | lo;
3811
3812                 break;
3813
3814         default:
3815                 return -ENXIO;
3816         }
3817
3818         return 0;
3819 }
3820
3821 static void fan_watchdog_fire(struct work_struct *ignored)
3822 {
3823         int rc;
3824
3825         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3826         rc = fan_set_enable();
3827         if (rc < 0) {
3828                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3829                         "will try again later...\n", -rc);
3830                 /* reschedule for later */
3831                 fan_watchdog_reset();
3832         }
3833 }
3834
3835 static void fan_watchdog_reset(void)
3836 {
3837         static int fan_watchdog_active;
3838
3839         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3840                 return;
3841
3842         if (fan_watchdog_active)
3843                 cancel_delayed_work(&fan_watchdog_task);
3844
3845         if (fan_watchdog_maxinterval > 0) {
3846                 fan_watchdog_active = 1;
3847                 if (!schedule_delayed_work(&fan_watchdog_task,
3848                                 msecs_to_jiffies(fan_watchdog_maxinterval
3849                                                  * 1000))) {
3850                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3851                                "watchdog will not trigger\n");
3852                 }
3853         } else
3854                 fan_watchdog_active = 0;
3855 }
3856
3857 static int fan_set_level(int level)
3858 {
3859         if (!fan_control_allowed)
3860                 return -EPERM;
3861
3862         switch (fan_control_access_mode) {
3863         case TPACPI_FAN_WR_ACPI_SFAN:
3864                 if (level >= 0 && level <= 7) {
3865                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3866                                 return -EIO;
3867                 } else
3868                         return -EINVAL;
3869                 break;
3870
3871         case TPACPI_FAN_WR_ACPI_FANS:
3872         case TPACPI_FAN_WR_TPEC:
3873                 if ((level != TP_EC_FAN_AUTO) &&
3874                     (level != TP_EC_FAN_FULLSPEED) &&
3875                     ((level < 0) || (level > 7)))
3876                         return -EINVAL;
3877
3878                 /* safety net should the EC not support AUTO
3879                  * or FULLSPEED mode bits and just ignore them */
3880                 if (level & TP_EC_FAN_FULLSPEED)
3881                         level |= 7;     /* safety min speed 7 */
3882                 else if (level & TP_EC_FAN_FULLSPEED)
3883                         level |= 4;     /* safety min speed 4 */
3884
3885                 if (!acpi_ec_write(fan_status_offset, level))
3886                         return -EIO;
3887                 else
3888                         tp_features.fan_ctrl_status_undef = 0;
3889                 break;
3890
3891         default:
3892                 return -ENXIO;
3893         }
3894         return 0;
3895 }
3896
3897 static int fan_set_level_safe(int level)
3898 {
3899         int rc;
3900
3901         if (!fan_control_allowed)
3902                 return -EPERM;
3903
3904         rc = mutex_lock_interruptible(&fan_mutex);
3905         if (rc < 0)
3906                 return rc;
3907
3908         if (level == TPACPI_FAN_LAST_LEVEL)
3909                 level = fan_control_desired_level;
3910
3911         rc = fan_set_level(level);
3912         if (!rc)
3913                 fan_update_desired_level(level);
3914
3915         mutex_unlock(&fan_mutex);
3916         return rc;
3917 }
3918
3919 static int fan_set_enable(void)
3920 {
3921         u8 s;
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         switch (fan_control_access_mode) {
3932         case TPACPI_FAN_WR_ACPI_FANS:
3933         case TPACPI_FAN_WR_TPEC:
3934                 rc = fan_get_status(&s);
3935                 if (rc < 0)
3936                         break;
3937
3938                 /* Don't go out of emergency fan mode */
3939                 if (s != 7) {
3940                         s &= 0x07;
3941                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3942                 }
3943
3944                 if (!acpi_ec_write(fan_status_offset, s))
3945                         rc = -EIO;
3946                 else {
3947                         tp_features.fan_ctrl_status_undef = 0;
3948                         rc = 0;
3949                 }
3950                 break;
3951
3952         case TPACPI_FAN_WR_ACPI_SFAN:
3953                 rc = fan_get_status(&s);
3954                 if (rc < 0)
3955                         break;
3956
3957                 s &= 0x07;
3958
3959                 /* Set fan to at least level 4 */
3960                 s |= 4;
3961
3962                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3963                         rc= -EIO;
3964                 else
3965                         rc = 0;
3966                 break;
3967
3968         default:
3969                 rc = -ENXIO;
3970         }
3971
3972         mutex_unlock(&fan_mutex);
3973         return rc;
3974 }
3975
3976 static int fan_set_disable(void)
3977 {
3978         int rc;
3979
3980         if (!fan_control_allowed)
3981                 return -EPERM;
3982
3983         rc = mutex_lock_interruptible(&fan_mutex);
3984         if (rc < 0)
3985                 return rc;
3986
3987         rc = 0;
3988         switch (fan_control_access_mode) {
3989         case TPACPI_FAN_WR_ACPI_FANS:
3990         case TPACPI_FAN_WR_TPEC:
3991                 if (!acpi_ec_write(fan_status_offset, 0x00))
3992                         rc = -EIO;
3993                 else {
3994                         fan_control_desired_level = 0;
3995                         tp_features.fan_ctrl_status_undef = 0;
3996                 }
3997                 break;
3998
3999         case TPACPI_FAN_WR_ACPI_SFAN:
4000                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4001                         rc = -EIO;
4002                 else
4003                         fan_control_desired_level = 0;
4004                 break;
4005
4006         default:
4007                 rc = -ENXIO;
4008         }
4009
4010
4011         mutex_unlock(&fan_mutex);
4012         return rc;
4013 }
4014
4015 static int fan_set_speed(int speed)
4016 {
4017         int rc;
4018
4019         if (!fan_control_allowed)
4020                 return -EPERM;
4021
4022         rc = mutex_lock_interruptible(&fan_mutex);
4023         if (rc < 0)
4024                 return rc;
4025
4026         rc = 0;
4027         switch (fan_control_access_mode) {
4028         case TPACPI_FAN_WR_ACPI_FANS:
4029                 if (speed >= 0 && speed <= 65535) {
4030                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4031                                         speed, speed, speed))
4032                                 rc = -EIO;
4033                 } else
4034                         rc = -EINVAL;
4035                 break;
4036
4037         default:
4038                 rc = -ENXIO;
4039         }
4040
4041         mutex_unlock(&fan_mutex);
4042         return rc;
4043 }
4044
4045 static int fan_read(char *p)
4046 {
4047         int len = 0;
4048         int rc;
4049         u8 status;
4050         unsigned int speed = 0;
4051
4052         switch (fan_status_access_mode) {
4053         case TPACPI_FAN_RD_ACPI_GFAN:
4054                 /* 570, 600e/x, 770e, 770x */
4055                 if ((rc = fan_get_status_safe(&status)) < 0)
4056                         return rc;
4057
4058                 len += sprintf(p + len, "status:\t\t%s\n"
4059                                "level:\t\t%d\n",
4060                                (status != 0) ? "enabled" : "disabled", status);
4061                 break;
4062
4063         case TPACPI_FAN_RD_TPEC:
4064                 /* all except 570, 600e/x, 770e, 770x */
4065                 if ((rc = fan_get_status_safe(&status)) < 0)
4066                         return rc;
4067
4068                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4069                         if (status != fan_control_initial_status)
4070                                 tp_features.fan_ctrl_status_undef = 0;
4071                         else
4072                                 /* Return most likely status. In fact, it
4073                                  * might be the only possible status */
4074                                 status = TP_EC_FAN_AUTO;
4075                 }
4076
4077                 len += sprintf(p + len, "status:\t\t%s\n",
4078                                (status != 0) ? "enabled" : "disabled");
4079
4080                 if ((rc = fan_get_speed(&speed)) < 0)
4081                         return rc;
4082
4083                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4084
4085                 if (status & TP_EC_FAN_FULLSPEED)
4086                         /* Disengaged mode takes precedence */
4087                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4088                 else if (status & TP_EC_FAN_AUTO)
4089                         len += sprintf(p + len, "level:\t\tauto\n");
4090                 else
4091                         len += sprintf(p + len, "level:\t\t%d\n", status);
4092                 break;
4093
4094         case TPACPI_FAN_NONE:
4095         default:
4096                 len += sprintf(p + len, "status:\t\tnot supported\n");
4097         }
4098
4099         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4100                 len += sprintf(p + len, "commands:\tlevel <level>");
4101
4102                 switch (fan_control_access_mode) {
4103                 case TPACPI_FAN_WR_ACPI_SFAN:
4104                         len += sprintf(p + len, " (<level> is 0-7)\n");
4105                         break;
4106
4107                 default:
4108                         len += sprintf(p + len, " (<level> is 0-7, "
4109                                        "auto, disengaged, full-speed)\n");
4110                         break;
4111                 }
4112         }
4113
4114         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4115                 len += sprintf(p + len, "commands:\tenable, disable\n"
4116                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4117                                "1-120 (seconds))\n");
4118
4119         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4120                 len += sprintf(p + len, "commands:\tspeed <speed>"
4121                                " (<speed> is 0-65535)\n");
4122
4123         return len;
4124 }
4125
4126 static int fan_write_cmd_level(const char *cmd, int *rc)
4127 {
4128         int level;
4129
4130         if (strlencmp(cmd, "level auto") == 0)
4131                 level = TP_EC_FAN_AUTO;
4132         else if ((strlencmp(cmd, "level disengaged") == 0) |
4133                  (strlencmp(cmd, "level full-speed") == 0))
4134                 level = TP_EC_FAN_FULLSPEED;
4135         else if (sscanf(cmd, "level %d", &level) != 1)
4136                 return 0;
4137
4138         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4139                 printk(IBM_ERR "level command accepted for unsupported "
4140                        "access mode %d", fan_control_access_mode);
4141
4142         return 1;
4143 }
4144
4145 static int fan_write_cmd_enable(const char *cmd, int *rc)
4146 {
4147         if (strlencmp(cmd, "enable") != 0)
4148                 return 0;
4149
4150         if ((*rc = fan_set_enable()) == -ENXIO)
4151                 printk(IBM_ERR "enable command accepted for unsupported "
4152                        "access mode %d", fan_control_access_mode);
4153
4154         return 1;
4155 }
4156
4157 static int fan_write_cmd_disable(const char *cmd, int *rc)
4158 {
4159         if (strlencmp(cmd, "disable") != 0)
4160                 return 0;
4161
4162         if ((*rc = fan_set_disable()) == -ENXIO)
4163                 printk(IBM_ERR "disable command accepted for unsupported "
4164                        "access mode %d", fan_control_access_mode);
4165
4166         return 1;
4167 }
4168
4169 static int fan_write_cmd_speed(const char *cmd, int *rc)
4170 {
4171         int speed;
4172
4173         /* TODO:
4174          * Support speed <low> <medium> <high> ? */
4175
4176         if (sscanf(cmd, "speed %d", &speed) != 1)
4177                 return 0;
4178
4179         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4180                 printk(IBM_ERR "speed command accepted for unsupported "
4181                        "access mode %d", fan_control_access_mode);
4182
4183         return 1;
4184 }
4185
4186 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4187 {
4188         int interval;
4189
4190         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4191                 return 0;
4192
4193         if (interval < 0 || interval > 120)
4194                 *rc = -EINVAL;
4195         else
4196                 fan_watchdog_maxinterval = interval;
4197
4198         return 1;
4199 }
4200
4201 static int fan_write(char *buf)
4202 {
4203         char *cmd;
4204         int rc = 0;
4205
4206         while (!rc && (cmd = next_cmd(&buf))) {
4207                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4208                       fan_write_cmd_level(cmd, &rc)) &&
4209                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4210                       (fan_write_cmd_enable(cmd, &rc) ||
4211                        fan_write_cmd_disable(cmd, &rc) ||
4212                        fan_write_cmd_watchdog(cmd, &rc))) &&
4213                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4214                       fan_write_cmd_speed(cmd, &rc))
4215                     )
4216                         rc = -EINVAL;
4217                 else if (!rc)
4218                         fan_watchdog_reset();
4219         }
4220
4221         return rc;
4222 }
4223
4224 static struct ibm_struct fan_driver_data = {
4225         .name = "fan",
4226         .read = fan_read,
4227         .write = fan_write,
4228         .exit = fan_exit,
4229 };
4230
4231 /****************************************************************************
4232  ****************************************************************************
4233  *
4234  * Infrastructure
4235  *
4236  ****************************************************************************
4237  ****************************************************************************/
4238
4239 /* /proc support */
4240 static struct proc_dir_entry *proc_dir;
4241
4242 /* Subdriver registry */
4243 static LIST_HEAD(tpacpi_all_drivers);
4244
4245
4246 /*
4247  * Module and infrastructure proble, init and exit handling
4248  */
4249
4250 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4251 static const char * __init str_supported(int is_supported)
4252 {
4253         static char text_unsupported[] __initdata = "not supported";
4254
4255         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4256 }
4257 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4258
4259 static int __init ibm_init(struct ibm_init_struct *iibm)
4260 {
4261         int ret;
4262         struct ibm_struct *ibm = iibm->data;
4263         struct proc_dir_entry *entry;
4264
4265         BUG_ON(ibm == NULL);
4266
4267         INIT_LIST_HEAD(&ibm->all_drivers);
4268
4269         if (ibm->flags.experimental && !experimental)
4270                 return 0;
4271
4272         dbg_printk(TPACPI_DBG_INIT,
4273                 "probing for %s\n", ibm->name);
4274
4275         if (iibm->init) {
4276                 ret = iibm->init(iibm);
4277                 if (ret > 0)
4278                         return 0;       /* probe failed */
4279                 if (ret)
4280                         return ret;
4281
4282                 ibm->flags.init_called = 1;
4283         }
4284
4285         if (ibm->acpi) {
4286                 if (ibm->acpi->hid) {
4287                         ret = register_tpacpi_subdriver(ibm);
4288                         if (ret)
4289                                 goto err_out;
4290                 }
4291
4292                 if (ibm->acpi->notify) {
4293                         ret = setup_acpi_notify(ibm);
4294                         if (ret == -ENODEV) {
4295                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4296                                         ibm->name);
4297                                 ret = 0;
4298                                 goto err_out;
4299                         }
4300                         if (ret < 0)
4301                                 goto err_out;
4302                 }
4303         }
4304
4305         dbg_printk(TPACPI_DBG_INIT,
4306                 "%s installed\n", ibm->name);
4307
4308         if (ibm->read) {
4309                 entry = create_proc_entry(ibm->name,
4310                                           S_IFREG | S_IRUGO | S_IWUSR,
4311                                           proc_dir);
4312                 if (!entry) {
4313                         printk(IBM_ERR "unable to create proc entry %s\n",
4314                                ibm->name);
4315                         ret = -ENODEV;
4316                         goto err_out;
4317                 }
4318                 entry->owner = THIS_MODULE;
4319                 entry->data = ibm;
4320                 entry->read_proc = &dispatch_procfs_read;
4321                 if (ibm->write)
4322                         entry->write_proc = &dispatch_procfs_write;
4323                 ibm->flags.proc_created = 1;
4324         }
4325
4326         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4327
4328         return 0;
4329
4330 err_out:
4331         dbg_printk(TPACPI_DBG_INIT,
4332                 "%s: at error exit path with result %d\n",
4333                 ibm->name, ret);
4334
4335         ibm_exit(ibm);
4336         return (ret < 0)? ret : 0;
4337 }
4338
4339 static void ibm_exit(struct ibm_struct *ibm)
4340 {
4341         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4342
4343         list_del_init(&ibm->all_drivers);
4344
4345         if (ibm->flags.acpi_notify_installed) {
4346                 dbg_printk(TPACPI_DBG_EXIT,
4347                         "%s: acpi_remove_notify_handler\n", ibm->name);
4348                 BUG_ON(!ibm->acpi);
4349                 acpi_remove_notify_handler(*ibm->acpi->handle,
4350                                            ibm->acpi->type,
4351                                            dispatch_acpi_notify);
4352                 ibm->flags.acpi_notify_installed = 0;
4353                 ibm->flags.acpi_notify_installed = 0;
4354         }
4355
4356         if (ibm->flags.proc_created) {
4357                 dbg_printk(TPACPI_DBG_EXIT,
4358                         "%s: remove_proc_entry\n", ibm->name);
4359                 remove_proc_entry(ibm->name, proc_dir);
4360                 ibm->flags.proc_created = 0;
4361         }
4362
4363         if (ibm->flags.acpi_driver_registered) {
4364                 dbg_printk(TPACPI_DBG_EXIT,
4365                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4366                 BUG_ON(!ibm->acpi);
4367                 acpi_bus_unregister_driver(ibm->acpi->driver);
4368                 kfree(ibm->acpi->driver);
4369                 ibm->acpi->driver = NULL;
4370                 ibm->flags.acpi_driver_registered = 0;
4371         }
4372
4373         if (ibm->flags.init_called && ibm->exit) {
4374                 ibm->exit();
4375                 ibm->flags.init_called = 0;
4376         }
4377
4378         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4379 }
4380
4381 /* Probing */
4382
4383 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4384 {
4385         struct dmi_device *dev = NULL;
4386         char ec_fw_string[18];
4387
4388         if (!tp)
4389                 return;
4390
4391         memset(tp, 0, sizeof(*tp));
4392
4393         if (dmi_name_in_vendors("IBM"))
4394                 tp->vendor = PCI_VENDOR_ID_IBM;
4395         else if (dmi_name_in_vendors("LENOVO"))
4396                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4397         else
4398                 return;
4399
4400         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4401                                         GFP_KERNEL);
4402         if (!tp->bios_version_str)
4403                 return;
4404         tp->bios_model = tp->bios_version_str[0]
4405                          | (tp->bios_version_str[1] << 8);
4406
4407         /*
4408          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4409          * X32 or newer, all Z series;  Some models must have an
4410          * up-to-date BIOS or they will not be detected.
4411          *
4412          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4413          */
4414         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4415                 if (sscanf(dev->name,
4416                            "IBM ThinkPad Embedded Controller -[%17c",
4417                            ec_fw_string) == 1) {
4418                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4419                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4420
4421                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4422                         tp->ec_model = ec_fw_string[0]
4423                                         | (ec_fw_string[1] << 8);
4424                         break;
4425                 }
4426         }
4427
4428         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4429                                         GFP_KERNEL);
4430         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4431                 kfree(tp->model_str);
4432                 tp->model_str = NULL;
4433         }
4434 }
4435
4436 static int __init probe_for_thinkpad(void)
4437 {
4438         int is_thinkpad;
4439
4440         if (acpi_disabled)
4441                 return -ENODEV;
4442
4443         /*
4444          * Non-ancient models have better DMI tagging, but very old models
4445          * don't.
4446          */
4447         is_thinkpad = (thinkpad_id.model_str != NULL);
4448
4449         /* ec is required because many other handles are relative to it */
4450         IBM_ACPIHANDLE_INIT(ec);
4451         if (!ec_handle) {
4452                 if (is_thinkpad)
4453                         printk(IBM_ERR
4454                                 "Not yet supported ThinkPad detected!\n");
4455                 return -ENODEV;
4456         }
4457
4458         /*
4459          * Risks a regression on very old machines, but reduces potential
4460          * false positives a damn great deal
4461          */
4462         if (!is_thinkpad)
4463                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4464
4465         if (!is_thinkpad && !force_load)
4466                 return -ENODEV;
4467
4468         return 0;
4469 }
4470
4471
4472 /* Module init, exit, parameters */
4473
4474 static struct ibm_init_struct ibms_init[] __initdata = {
4475         {
4476                 .init = thinkpad_acpi_driver_init,
4477                 .data = &thinkpad_acpi_driver_data,
4478         },
4479         {
4480                 .init = hotkey_init,
4481                 .data = &hotkey_driver_data,
4482         },
4483         {
4484                 .init = bluetooth_init,
4485                 .data = &bluetooth_driver_data,
4486         },
4487         {
4488                 .init = wan_init,
4489                 .data = &wan_driver_data,
4490         },
4491         {
4492                 .init = video_init,
4493                 .data = &video_driver_data,
4494         },
4495         {
4496                 .init = light_init,
4497                 .data = &light_driver_data,
4498         },
4499 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4500         {
4501                 .init = dock_init,
4502                 .data = &dock_driver_data[0],
4503         },
4504         {
4505                 .init = dock_init2,
4506                 .data = &dock_driver_data[1],
4507         },
4508 #endif
4509 #ifdef CONFIG_THINKPAD_ACPI_BAY
4510         {
4511                 .init = bay_init,
4512                 .data = &bay_driver_data,
4513         },
4514 #endif
4515         {
4516                 .init = cmos_init,
4517                 .data = &cmos_driver_data,
4518         },
4519         {
4520                 .init = led_init,
4521                 .data = &led_driver_data,
4522         },
4523         {
4524                 .init = beep_init,
4525                 .data = &beep_driver_data,
4526         },
4527         {
4528                 .init = thermal_init,
4529                 .data = &thermal_driver_data,
4530         },
4531         {
4532                 .data = &ecdump_driver_data,
4533         },
4534         {
4535                 .init = brightness_init,
4536                 .data = &brightness_driver_data,
4537         },
4538         {
4539                 .data = &volume_driver_data,
4540         },
4541         {
4542                 .init = fan_init,
4543                 .data = &fan_driver_data,
4544         },
4545 };
4546
4547 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4548 {
4549         unsigned int i;
4550         struct ibm_struct *ibm;
4551
4552         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4553                 ibm = ibms_init[i].data;
4554                 BUG_ON(ibm == NULL);
4555
4556                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4557                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4558                                 return -ENOSPC;
4559                         strcpy(ibms_init[i].param, val);
4560                         strcat(ibms_init[i].param, ",");
4561                         return 0;
4562                 }
4563         }
4564
4565         return -EINVAL;
4566 }
4567
4568 static int experimental;
4569 module_param(experimental, int, 0);
4570
4571 static u32 dbg_level;
4572 module_param_named(debug, dbg_level, uint, 0);
4573
4574 static int force_load;
4575 module_param(force_load, bool, 0);
4576
4577 static int fan_control_allowed;
4578 module_param_named(fan_control, fan_control_allowed, bool, 0);
4579
4580 static int brightness_mode;
4581 module_param_named(brightness_mode, brightness_mode, int, 0);
4582
4583 #define IBM_PARAM(feature) \
4584         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4585
4586 IBM_PARAM(hotkey);
4587 IBM_PARAM(bluetooth);
4588 IBM_PARAM(video);
4589 IBM_PARAM(light);
4590 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4591 IBM_PARAM(dock);
4592 #endif
4593 #ifdef CONFIG_THINKPAD_ACPI_BAY
4594 IBM_PARAM(bay);
4595 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4596 IBM_PARAM(cmos);
4597 IBM_PARAM(led);
4598 IBM_PARAM(beep);
4599 IBM_PARAM(ecdump);
4600 IBM_PARAM(brightness);
4601 IBM_PARAM(volume);
4602 IBM_PARAM(fan);
4603
4604 static int __init thinkpad_acpi_module_init(void)
4605 {
4606         int ret, i;
4607
4608         /* Driver-level probe */
4609
4610         get_thinkpad_model_data(&thinkpad_id);
4611         ret = probe_for_thinkpad();
4612         if (ret) {
4613                 thinkpad_acpi_module_exit();
4614                 return ret;
4615         }
4616
4617         /* Driver initialization */
4618
4619         IBM_ACPIHANDLE_INIT(ecrd);
4620         IBM_ACPIHANDLE_INIT(ecwr);
4621
4622         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4623         if (!proc_dir) {
4624                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4625                 thinkpad_acpi_module_exit();
4626                 return -ENODEV;
4627         }
4628         proc_dir->owner = THIS_MODULE;
4629
4630         ret = platform_driver_register(&tpacpi_pdriver);
4631         if (ret) {
4632                 printk(IBM_ERR "unable to register platform driver\n");
4633                 thinkpad_acpi_module_exit();
4634                 return ret;
4635         }
4636         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4637         if (ret) {
4638                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4639                 thinkpad_acpi_module_exit();
4640                 return ret;
4641         }
4642
4643
4644         /* Device initialization */
4645         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4646                                                         NULL, 0);
4647         if (IS_ERR(tpacpi_pdev)) {
4648                 ret = PTR_ERR(tpacpi_pdev);
4649                 tpacpi_pdev = NULL;
4650                 printk(IBM_ERR "unable to register platform device\n");
4651                 thinkpad_acpi_module_exit();
4652                 return ret;
4653         }
4654         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4655         if (IS_ERR(tpacpi_hwmon)) {
4656                 ret = PTR_ERR(tpacpi_hwmon);
4657                 tpacpi_hwmon = NULL;
4658                 printk(IBM_ERR "unable to register hwmon device\n");
4659                 thinkpad_acpi_module_exit();
4660                 return ret;
4661         }
4662         tpacpi_inputdev = input_allocate_device();
4663         if (!tpacpi_inputdev) {
4664                 printk(IBM_ERR "unable to allocate input device\n");
4665                 thinkpad_acpi_module_exit();
4666                 return -ENOMEM;
4667         } else {
4668                 /* Prepare input device, but don't register */
4669                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4670                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4671                 tpacpi_inputdev->id.bustype = BUS_HOST;
4672                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4673                                                 thinkpad_id.vendor :
4674                                                 PCI_VENDOR_ID_IBM;
4675                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4676                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4677         }
4678         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4679                 ret = ibm_init(&ibms_init[i]);
4680                 if (ret >= 0 && *ibms_init[i].param)
4681                         ret = ibms_init[i].data->write(ibms_init[i].param);
4682                 if (ret < 0) {
4683                         thinkpad_acpi_module_exit();
4684                         return ret;
4685                 }
4686         }
4687         ret = input_register_device(tpacpi_inputdev);
4688         if (ret < 0) {
4689                 printk(IBM_ERR "unable to register input device\n");
4690                 thinkpad_acpi_module_exit();
4691                 return ret;
4692         } else {
4693                 tp_features.input_device_registered = 1;
4694         }
4695
4696         return 0;
4697 }
4698
4699 static void thinkpad_acpi_module_exit(void)
4700 {
4701         struct ibm_struct *ibm, *itmp;
4702
4703         list_for_each_entry_safe_reverse(ibm, itmp,
4704                                          &tpacpi_all_drivers,
4705                                          all_drivers) {
4706                 ibm_exit(ibm);
4707         }
4708
4709         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4710
4711         if (tpacpi_inputdev) {
4712                 if (tp_features.input_device_registered)
4713                         input_unregister_device(tpacpi_inputdev);
4714                 else
4715                         input_free_device(tpacpi_inputdev);
4716         }
4717
4718         if (tpacpi_hwmon)
4719                 hwmon_device_unregister(tpacpi_hwmon);
4720
4721         if (tpacpi_pdev)
4722                 platform_device_unregister(tpacpi_pdev);
4723
4724         tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4725         platform_driver_unregister(&tpacpi_pdriver);
4726
4727         if (proc_dir)
4728                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4729
4730         kfree(thinkpad_id.bios_version_str);
4731         kfree(thinkpad_id.ec_version_str);
4732         kfree(thinkpad_id.model_str);
4733 }
4734
4735 module_init(thinkpad_acpi_module_init);
4736 module_exit(thinkpad_acpi_module_exit);