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 "0.17"
  25 #define TPACPI_SYSFS_VERSION 0x020000
  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 static enum {
 121         TPACPI_LIFE_INIT = 0,
 122         TPACPI_LIFE_RUNNING,
 123         TPACPI_LIFE_EXITING,
 124 } tpacpi_lifecycle;
 125
 126 /****************************************************************************
 127  ****************************************************************************
 128  *
 129  * ACPI Helpers and device model
 130  *
 131  ****************************************************************************
 132  ****************************************************************************/
 133
 134 /*************************************************************************
 135  * ACPI basic handles
 136  */
 137
 138 static acpi_handle root_handle;
 139
 140 #define IBM_HANDLE(object, parent, paths...)                    \
 141         static acpi_handle  object##_handle;                    \
 142         static acpi_handle *object##_parent = &parent##_handle; \
 143         static char        *object##_path;                      \
 144         static char        *object##_paths[] = { paths }
 145
 146 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 147            "\\_SB.PCI.ISA.EC",  /* 570 */
 148            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 149            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 150            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 151            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 152            "\\_SB.PCI0.LPC.EC", /* all others */
 153            );
 154
 155 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 156 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 157
 158
 159 /*************************************************************************
 160  * Misc ACPI handles
 161  */
 162
 163 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 164            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 165            "\\CMS",             /* R40, R40e */
 166            );                   /* all others */
 167
 168 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 169            "^HKEY",             /* R30, R31 */
 170            "HKEY",              /* all others */
 171            );                   /* 570 */
 172
 173
 174 /*************************************************************************
 175  * ACPI helpers
 176  */
 177
 178 static int acpi_evalf(acpi_handle handle,
 179                       void *res, char *method, char *fmt, ...)
 180 {
 181         char *fmt0 = fmt;
 182         struct acpi_object_list params;
 183         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 184         struct acpi_buffer result, *resultp;
 185         union acpi_object out_obj;
 186         acpi_status status;
 187         va_list ap;
 188         char res_type;
 189         int success;
 190         int quiet;
 191
 192         if (!*fmt) {
 193                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 194                 return 0;
 195         }
 196
 197         if (*fmt == 'q') {
 198                 quiet = 1;
 199                 fmt++;
 200         } else
 201                 quiet = 0;
 202
 203         res_type = *(fmt++);
 204
 205         params.count = 0;
 206         params.pointer = &in_objs[0];
 207
 208         va_start(ap, fmt);
 209         while (*fmt) {
 210                 char c = *(fmt++);
 211                 switch (c) {
 212                 case 'd':       /* int */
 213                         in_objs[params.count].integer.value = va_arg(ap, int);
 214                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 215                         break;
 216                         /* add more types as needed */
 217                 default:
 218                         printk(IBM_ERR "acpi_evalf() called "
 219                                "with invalid format character '%c'\n", c);
 220                         return 0;
 221                 }
 222         }
 223         va_end(ap);
 224
 225         if (res_type != 'v') {
 226                 result.length = sizeof(out_obj);
 227                 result.pointer = &out_obj;
 228                 resultp = &result;
 229         } else
 230                 resultp = NULL;
 231
 232         status = acpi_evaluate_object(handle, method, &params, resultp);
 233
 234         switch (res_type) {
 235         case 'd':               /* int */
 236                 if (res)
 237                         *(int *)res = out_obj.integer.value;
 238                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 239                 break;
 240         case 'v':               /* void */
 241                 success = status == AE_OK;
 242                 break;
 243                 /* add more types as needed */
 244         default:
 245                 printk(IBM_ERR "acpi_evalf() called "
 246                        "with invalid format character '%c'\n", res_type);
 247                 return 0;
 248         }
 249
 250         if (!success && !quiet)
 251                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 252                        method, fmt0, status);
 253
 254         return success;
 255 }
 256
 257 static void __unused acpi_print_int(acpi_handle handle, char *method)
 258 {
 259         int i;
 260
 261         if (acpi_evalf(handle, &i, method, "d"))
 262                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 263         else
 264                 printk(IBM_ERR "error calling %s\n", method);
 265 }
 266
 267 static int acpi_ec_read(int i, u8 * p)
 268 {
 269         int v;
 270
 271         if (ecrd_handle) {
 272                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 273                         return 0;
 274                 *p = v;
 275         } else {
 276                 if (ec_read(i, p) < 0)
 277                         return 0;
 278         }
 279
 280         return 1;
 281 }
 282
 283 static int acpi_ec_write(int i, u8 v)
 284 {
 285         if (ecwr_handle) {
 286                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 287                         return 0;
 288         } else {
 289                 if (ec_write(i, v) < 0)
 290                         return 0;
 291         }
 292
 293         return 1;
 294 }
 295
 296 static int _sta(acpi_handle handle)
 297 {
 298         int status;
 299
 300         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 301                 status = 0;
 302
 303         return status;
 304 }
 305
 306 static int issue_thinkpad_cmos_command(int cmos_cmd)
 307 {
 308         if (!cmos_handle)
 309                 return -ENXIO;
 310
 311         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 312                 return -EIO;
 313
 314         return 0;
 315 }
 316
 317 /*************************************************************************
 318  * ACPI device model
 319  */
 320
 321 static void drv_acpi_handle_init(char *name,
 322                            acpi_handle *handle, acpi_handle parent,
 323                            char **paths, int num_paths, char **path)
 324 {
 325         int i;
 326         acpi_status status;
 327
 328         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 329                 name);
 330
 331         for (i = 0; i < num_paths; i++) {
 332                 status = acpi_get_handle(parent, paths[i], handle);
 333                 if (ACPI_SUCCESS(status)) {
 334                         *path = paths[i];
 335                         dbg_printk(TPACPI_DBG_INIT,
 336                                    "Found ACPI handle %s for %s\n",
 337                                    *path, name);
 338                         return;
 339                 }
 340         }
 341
 342         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 343                     name);
 344         *handle = NULL;
 345 }
 346
 347 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 348 {
 349         struct ibm_struct *ibm = data;
 350
 351         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 352                 return;
 353
 354         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 355                 return;
 356
 357         ibm->acpi->notify(ibm, event);
 358 }
 359
 360 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 361 {
 362         acpi_status status;
 363         int rc;
 364
 365         BUG_ON(!ibm->acpi);
 366
 367         if (!*ibm->acpi->handle)
 368                 return 0;
 369
 370         vdbg_printk(TPACPI_DBG_INIT,
 371                 "setting up ACPI notify for %s\n", ibm->name);
 372
 373         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 374         if (rc < 0) {
 375                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 376                         ibm->name, rc);
 377                 return -ENODEV;
 378         }
 379
 380         acpi_driver_data(ibm->acpi->device) = ibm;
 381         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 382                 IBM_ACPI_EVENT_PREFIX,
 383                 ibm->name);
 384
 385         status = acpi_install_notify_handler(*ibm->acpi->handle,
 386                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 387         if (ACPI_FAILURE(status)) {
 388                 if (status == AE_ALREADY_EXISTS) {
 389                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 390                                 ibm->name);
 391                 } else {
 392                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 393                                 ibm->name, status);
 394                 }
 395                 return -ENODEV;
 396         }
 397         ibm->flags.acpi_notify_installed = 1;
 398         return 0;
 399 }
 400
 401 static int __init tpacpi_device_add(struct acpi_device *device)
 402 {
 403         return 0;
 404 }
 405
 406 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 407 {
 408         int rc;
 409
 410         dbg_printk(TPACPI_DBG_INIT,
 411                 "registering %s as an ACPI driver\n", ibm->name);
 412
 413         BUG_ON(!ibm->acpi);
 414
 415         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 416         if (!ibm->acpi->driver) {
 417                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 418                 return -ENOMEM;
 419         }
 420
 421         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 422         ibm->acpi->driver->ids = ibm->acpi->hid;
 423
 424         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 425
 426         rc = acpi_bus_register_driver(ibm->acpi->driver);
 427         if (rc < 0) {
 428                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 429                        ibm->name, rc);
 430                 kfree(ibm->acpi->driver);
 431                 ibm->acpi->driver = NULL;
 432         } else if (!rc)
 433                 ibm->flags.acpi_driver_registered = 1;
 434
 435         return rc;
 436 }
 437
 438
 439 /****************************************************************************
 440  ****************************************************************************
 441  *
 442  * Procfs Helpers
 443  *
 444  ****************************************************************************
 445  ****************************************************************************/
 446
 447 static int dispatch_procfs_read(char *page, char **start, off_t off,
 448                         int count, int *eof, void *data)
 449 {
 450         struct ibm_struct *ibm = data;
 451         int len;
 452
 453         if (!ibm || !ibm->read)
 454                 return -EINVAL;
 455
 456         len = ibm->read(page);
 457         if (len < 0)
 458                 return len;
 459
 460         if (len <= off + count)
 461                 *eof = 1;
 462         *start = page + off;
 463         len -= off;
 464         if (len > count)
 465                 len = count;
 466         if (len < 0)
 467                 len = 0;
 468
 469         return len;
 470 }
 471
 472 static int dispatch_procfs_write(struct file *file,
 473                         const char __user * userbuf,
 474                         unsigned long count, void *data)
 475 {
 476         struct ibm_struct *ibm = data;
 477         char *kernbuf;
 478         int ret;
 479
 480         if (!ibm || !ibm->write)
 481                 return -EINVAL;
 482
 483         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 484         if (!kernbuf)
 485                 return -ENOMEM;
 486
 487         if (copy_from_user(kernbuf, userbuf, count)) {
 488                 kfree(kernbuf);
 489                 return -EFAULT;
 490         }
 491
 492         kernbuf[count] = 0;
 493         strcat(kernbuf, ",");
 494         ret = ibm->write(kernbuf);
 495         if (ret == 0)
 496                 ret = count;
 497
 498         kfree(kernbuf);
 499
 500         return ret;
 501 }
 502
 503 static char *next_cmd(char **cmds)
 504 {
 505         char *start = *cmds;
 506         char *end;
 507
 508         while ((end = strchr(start, ',')) && end == start)
 509                 start = end + 1;
 510
 511         if (!end)
 512                 return NULL;
 513
 514         *end = 0;
 515         *cmds = end + 1;
 516         return start;
 517 }
 518
 519
 520 /****************************************************************************
 521  ****************************************************************************
 522  *
 523  * Device model: input, hwmon and platform
 524  *
 525  ****************************************************************************
 526  ****************************************************************************/
 527
 528 static struct platform_device *tpacpi_pdev;
 529 static struct platform_device *tpacpi_sensors_pdev;
 530 static struct device *tpacpi_hwmon;
 531 static struct input_dev *tpacpi_inputdev;
 532 static struct mutex tpacpi_inputdev_send_mutex;
 533
 534
 535 static int tpacpi_resume_handler(struct platform_device *pdev)
 536 {
 537         struct ibm_struct *ibm, *itmp;
 538
 539         list_for_each_entry_safe(ibm, itmp,
 540                                  &tpacpi_all_drivers,
 541                                  all_drivers) {
 542                 if (ibm->resume)
 543                         (ibm->resume)();
 544         }
 545
 546         return 0;
 547 }
 548
 549 static struct platform_driver tpacpi_pdriver = {
 550         .driver = {
 551                 .name = IBM_DRVR_NAME,
 552                 .owner = THIS_MODULE,
 553         },
 554         .resume = tpacpi_resume_handler,
 555 };
 556
 557 static struct platform_driver tpacpi_hwmon_pdriver = {
 558         .driver = {
 559                 .name = IBM_HWMON_DRVR_NAME,
 560                 .owner = THIS_MODULE,
 561         },
 562 };
 563
 564 /*************************************************************************
 565  * thinkpad-acpi driver attributes
 566  */
 567
 568 /* interface_version --------------------------------------------------- */
 569 static ssize_t tpacpi_driver_interface_version_show(
 570                                 struct device_driver *drv,
 571                                 char *buf)
 572 {
 573         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 574 }
 575
 576 static DRIVER_ATTR(interface_version, S_IRUGO,
 577                 tpacpi_driver_interface_version_show, NULL);
 578
 579 /* debug_level --------------------------------------------------------- */
 580 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 581                                                 char *buf)
 582 {
 583         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 584 }
 585
 586 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 587                                                 const char *buf, size_t count)
 588 {
 589         unsigned long t;
 590
 591         if (parse_strtoul(buf, 0xffff, &t))
 592                 return -EINVAL;
 593
 594         dbg_level = t;
 595
 596         return count;
 597 }
 598
 599 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 600                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 601
 602 /* version ------------------------------------------------------------- */
 603 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 604                                                 char *buf)
 605 {
 606         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 607 }
 608
 609 static DRIVER_ATTR(version, S_IRUGO,
 610                 tpacpi_driver_version_show, NULL);
 611
 612 /* --------------------------------------------------------------------- */
 613
 614 static struct driver_attribute* tpacpi_driver_attributes[] = {
 615         &driver_attr_debug_level, &driver_attr_version,
 616         &driver_attr_interface_version,
 617 };
 618
 619 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 620 {
 621         int i, res;
 622
 623         i = 0;
 624         res = 0;
 625         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 626                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 627                 i++;
 628         }
 629
 630         return res;
 631 }
 632
 633 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 634 {
 635         int i;
 636
 637         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 638                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 639 }
 640
 641 /*************************************************************************
 642  * sysfs support helpers
 643  */
 644
 645 struct attribute_set_obj {
 646         struct attribute_set s;
 647         struct attribute *a;
 648 } __attribute__((packed));
 649
 650 static struct attribute_set *create_attr_set(unsigned int max_members,
 651                                                 const char* name)
 652 {
 653         struct attribute_set_obj *sobj;
 654
 655         if (max_members == 0)
 656                 return NULL;
 657
 658         /* Allocates space for implicit NULL at the end too */
 659         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 660                     max_members * sizeof(struct attribute *),
 661                     GFP_KERNEL);
 662         if (!sobj)
 663                 return NULL;
 664         sobj->s.max_members = max_members;
 665         sobj->s.group.attrs = &sobj->a;
 666         sobj->s.group.name = name;
 667
 668         return &sobj->s;
 669 }
 670
 671 /* not multi-threaded safe, use it in a single thread per set */
 672 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 673 {
 674         if (!s || !attr)
 675                 return -EINVAL;
 676
 677         if (s->members >= s->max_members)
 678                 return -ENOMEM;
 679
 680         s->group.attrs[s->members] = attr;
 681         s->members++;
 682
 683         return 0;
 684 }
 685
 686 static int add_many_to_attr_set(struct attribute_set* s,
 687                         struct attribute **attr,
 688                         unsigned int count)
 689 {
 690         int i, res;
 691
 692         for (i = 0; i < count; i++) {
 693                 res = add_to_attr_set(s, attr[i]);
 694                 if (res)
 695                         return res;
 696         }
 697
 698         return 0;
 699 }
 700
 701 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 702 {
 703         sysfs_remove_group(kobj, &s->group);
 704         destroy_attr_set(s);
 705 }
 706
 707 static int parse_strtoul(const char *buf,
 708                 unsigned long max, unsigned long *value)
 709 {
 710         char *endp;
 711
 712         while (*buf && isspace(*buf))
 713                 buf++;
 714         *value = simple_strtoul(buf, &endp, 0);
 715         while (*endp && isspace(*endp))
 716                 endp++;
 717         if (*endp || *value > max)
 718                 return -EINVAL;
 719
 720         return 0;
 721 }
 722
 723 /****************************************************************************
 724  ****************************************************************************
 725  *
 726  * Subdrivers
 727  *
 728  ****************************************************************************
 729  ****************************************************************************/
 730
 731 /*************************************************************************
 732  * thinkpad-acpi init subdriver
 733  */
 734
 735 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 736 {
 737         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 738         printk(IBM_INFO "%s\n", IBM_URL);
 739
 740         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
 741                 (thinkpad_id.bios_version_str) ?
 742                         thinkpad_id.bios_version_str : "unknown",
 743                 (thinkpad_id.ec_version_str) ?
 744                         thinkpad_id.ec_version_str : "unknown");
 745
 746         if (thinkpad_id.vendor && thinkpad_id.model_str)
 747                 printk(IBM_INFO "%s %s\n",
 748                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 749                                 "IBM" : ((thinkpad_id.vendor ==
 750                                                 PCI_VENDOR_ID_LENOVO) ?
 751                                         "Lenovo" : "Unknown vendor"),
 752                         thinkpad_id.model_str);
 753
 754         return 0;
 755 }
 756
 757 static int thinkpad_acpi_driver_read(char *p)
 758 {
 759         int len = 0;
 760
 761         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 762         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 763
 764         return len;
 765 }
 766
 767 static struct ibm_struct thinkpad_acpi_driver_data = {
 768         .name = "driver",
 769         .read = thinkpad_acpi_driver_read,
 770 };
 771
 772 /*************************************************************************
 773  * Hotkey subdriver
 774  */
 775
 776 static int hotkey_orig_status;
 777 static u32 hotkey_orig_mask;
 778 static u32 hotkey_all_mask;
 779 static u32 hotkey_reserved_mask;
 780
 781 static u16 *hotkey_keycode_map;
 782
 783 static struct attribute_set *hotkey_dev_attributes;
 784
 785 static int hotkey_get_wlsw(int *status)
 786 {
 787         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 788                 return -EIO;
 789         return 0;
 790 }
 791
 792 /* sysfs hotkey enable ------------------------------------------------- */
 793 static ssize_t hotkey_enable_show(struct device *dev,
 794                            struct device_attribute *attr,
 795                            char *buf)
 796 {
 797         int res, status;
 798         u32 mask;
 799
 800         res = hotkey_get(&status, &mask);
 801         if (res)
 802                 return res;
 803
 804         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 805 }
 806
 807 static ssize_t hotkey_enable_store(struct device *dev,
 808                             struct device_attribute *attr,
 809                             const char *buf, size_t count)
 810 {
 811         unsigned long t;
 812         int res, status;
 813         u32 mask;
 814
 815         if (parse_strtoul(buf, 1, &t))
 816                 return -EINVAL;
 817
 818         res = hotkey_get(&status, &mask);
 819         if (!res)
 820                 res = hotkey_set(t, mask);
 821
 822         return (res) ? res : count;
 823 }
 824
 825 static struct device_attribute dev_attr_hotkey_enable =
 826         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 827                 hotkey_enable_show, hotkey_enable_store);
 828
 829 /* sysfs hotkey mask --------------------------------------------------- */
 830 static ssize_t hotkey_mask_show(struct device *dev,
 831                            struct device_attribute *attr,
 832                            char *buf)
 833 {
 834         int res, status;
 835         u32 mask;
 836
 837         res = hotkey_get(&status, &mask);
 838         if (res)
 839                 return res;
 840
 841         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
 842 }
 843
 844 static ssize_t hotkey_mask_store(struct device *dev,
 845                             struct device_attribute *attr,
 846                             const char *buf, size_t count)
 847 {
 848         unsigned long t;
 849         int res, status;
 850         u32 mask;
 851
 852         if (parse_strtoul(buf, 0xffffffffUL, &t))
 853                 return -EINVAL;
 854
 855         res = hotkey_get(&status, &mask);
 856         if (!res)
 857                 hotkey_set(status, t);
 858
 859         return (res) ? res : count;
 860 }
 861
 862 static struct device_attribute dev_attr_hotkey_mask =
 863         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 864                 hotkey_mask_show, hotkey_mask_store);
 865
 866 /* sysfs hotkey bios_enabled ------------------------------------------- */
 867 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 868                            struct device_attribute *attr,
 869                            char *buf)
 870 {
 871         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 872 }
 873
 874 static struct device_attribute dev_attr_hotkey_bios_enabled =
 875         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 876
 877 /* sysfs hotkey bios_mask ---------------------------------------------- */
 878 static ssize_t hotkey_bios_mask_show(struct device *dev,
 879                            struct device_attribute *attr,
 880                            char *buf)
 881 {
 882         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 883 }
 884
 885 static struct device_attribute dev_attr_hotkey_bios_mask =
 886         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 887
 888 /* sysfs hotkey all_mask ----------------------------------------------- */
 889 static ssize_t hotkey_all_mask_show(struct device *dev,
 890                            struct device_attribute *attr,
 891                            char *buf)
 892 {
 893         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 894 }
 895
 896 static struct device_attribute dev_attr_hotkey_all_mask =
 897         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 898
 899 /* sysfs hotkey recommended_mask --------------------------------------- */
 900 static ssize_t hotkey_recommended_mask_show(struct device *dev,
 901                                             struct device_attribute *attr,
 902                                             char *buf)
 903 {
 904         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
 905                         hotkey_all_mask & ~hotkey_reserved_mask);
 906 }
 907
 908 static struct device_attribute dev_attr_hotkey_recommended_mask =
 909         __ATTR(hotkey_recommended_mask, S_IRUGO,
 910                 hotkey_recommended_mask_show, NULL);
 911
 912 /* sysfs hotkey radio_sw ----------------------------------------------- */
 913 static ssize_t hotkey_radio_sw_show(struct device *dev,
 914                            struct device_attribute *attr,
 915                            char *buf)
 916 {
 917         int res, s;
 918         res = hotkey_get_wlsw(&s);
 919         if (res < 0)
 920                 return res;
 921
 922         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
 923 }
 924
 925 static struct device_attribute dev_attr_hotkey_radio_sw =
 926         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
 927
 928 /* sysfs hotkey report_mode -------------------------------------------- */
 929 static ssize_t hotkey_report_mode_show(struct device *dev,
 930                            struct device_attribute *attr,
 931                            char *buf)
 932 {
 933         return snprintf(buf, PAGE_SIZE, "%d\n",
 934                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
 935 }
 936
 937 static struct device_attribute dev_attr_hotkey_report_mode =
 938         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
 939
 940 /* --------------------------------------------------------------------- */
 941
 942 static struct attribute *hotkey_attributes[] __initdata = {
 943         &dev_attr_hotkey_enable.attr,
 944         &dev_attr_hotkey_report_mode.attr,
 945 };
 946
 947 static struct attribute *hotkey_mask_attributes[] __initdata = {
 948         &dev_attr_hotkey_mask.attr,
 949         &dev_attr_hotkey_bios_enabled.attr,
 950         &dev_attr_hotkey_bios_mask.attr,
 951         &dev_attr_hotkey_all_mask.attr,
 952         &dev_attr_hotkey_recommended_mask.attr,
 953 };
 954
 955 static int __init hotkey_init(struct ibm_init_struct *iibm)
 956 {
 957
 958         static u16 ibm_keycode_map[] __initdata = {
 959                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 960                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
 961                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 962                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 963                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 964                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 965                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 966                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 967                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
 968                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 969                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
 970                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 971                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 972                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 973                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 974                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 975                 KEY_RESERVED,   /* 0x16: MUTE */
 976                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
 977                 /* (assignments unknown, please report if found) */
 978                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 979                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 980         };
 981         static u16 lenovo_keycode_map[] __initdata = {
 982                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 983                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
 984                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 985                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 986                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 987                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 988                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 989                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 990                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
 991                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 992                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
 993                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 994                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 995                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 996                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 997                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 998                 KEY_RESERVED,   /* 0x16: MUTE */
 999                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1000                 /* (assignments unknown, please report if found) */
1001                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1002                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1003         };
1004
1005 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1006 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1007 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1008
1009         int res, i;
1010         int status;
1011         int hkeyv;
1012
1013         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1014
1015         BUG_ON(!tpacpi_inputdev);
1016
1017         IBM_ACPIHANDLE_INIT(hkey);
1018         mutex_init(&hotkey_mutex);
1019
1020         /* hotkey not supported on 570 */
1021         tp_features.hotkey = hkey_handle != NULL;
1022
1023         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1024                 str_supported(tp_features.hotkey));
1025
1026         if (tp_features.hotkey) {
1027                 hotkey_dev_attributes = create_attr_set(8, NULL);
1028                 if (!hotkey_dev_attributes)
1029                         return -ENOMEM;
1030                 res = add_many_to_attr_set(hotkey_dev_attributes,
1031                                 hotkey_attributes,
1032                                 ARRAY_SIZE(hotkey_attributes));
1033                 if (res)
1034                         return res;
1035
1036                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1037                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1038                    for HKEY interface version 0x100 */
1039                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1040                         if ((hkeyv >> 8) != 1) {
1041                                 printk(IBM_ERR "unknown version of the "
1042                                        "HKEY interface: 0x%x\n", hkeyv);
1043                                 printk(IBM_ERR "please report this to %s\n",
1044                                        IBM_MAIL);
1045                         } else {
1046                                 /*
1047                                  * MHKV 0x100 in A31, R40, R40e,
1048                                  * T4x, X31, and later
1049                                  * */
1050                                 tp_features.hotkey_mask = 1;
1051                         }
1052                 }
1053
1054                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1055                         str_supported(tp_features.hotkey_mask));
1056
1057                 if (tp_features.hotkey_mask) {
1058                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1059                                         "MHKA", "qd")) {
1060                                 printk(IBM_ERR
1061                                        "missing MHKA handler, "
1062                                        "please report this to %s\n",
1063                                        IBM_MAIL);
1064                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1065                         }
1066                 }
1067
1068                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1069                 if (!res && tp_features.hotkey_mask) {
1070                         res = add_many_to_attr_set(hotkey_dev_attributes,
1071                                 hotkey_mask_attributes,
1072                                 ARRAY_SIZE(hotkey_mask_attributes));
1073                 }
1074
1075                 /* Not all thinkpads have a hardware radio switch */
1076                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1077                         tp_features.hotkey_wlsw = 1;
1078                         printk(IBM_INFO
1079                                 "radio switch found; radios are %s\n",
1080                                 enabled(status, 0));
1081                         res = add_to_attr_set(hotkey_dev_attributes,
1082                                         &dev_attr_hotkey_radio_sw.attr);
1083                 }
1084
1085                 if (!res)
1086                         res = register_attr_set_with_sysfs(
1087                                         hotkey_dev_attributes,
1088                                         &tpacpi_pdev->dev.kobj);
1089                 if (res)
1090                         return res;
1091
1092                 /* Set up key map */
1093
1094                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1095                                                 GFP_KERNEL);
1096                 if (!hotkey_keycode_map) {
1097                         printk(IBM_ERR "failed to allocate memory for key map\n");
1098                         return -ENOMEM;
1099                 }
1100
1101                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1102                         dbg_printk(TPACPI_DBG_INIT,
1103                                    "using Lenovo default hot key map\n");
1104                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1105                                 TPACPI_HOTKEY_MAP_SIZE);
1106                 } else {
1107                         dbg_printk(TPACPI_DBG_INIT,
1108                                    "using IBM default hot key map\n");
1109                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1110                                 TPACPI_HOTKEY_MAP_SIZE);
1111                 }
1112
1113                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1114                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1115                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1116                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1117                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1118                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1119                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1120                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1121                                 set_bit(hotkey_keycode_map[i],
1122                                         tpacpi_inputdev->keybit);
1123                         } else {
1124                                 if (i < sizeof(hotkey_reserved_mask)*8)
1125                                         hotkey_reserved_mask |= 1 << i;
1126                         }
1127                 }
1128
1129                 if (tp_features.hotkey_wlsw) {
1130                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1131                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1132                 }
1133
1134                 dbg_printk(TPACPI_DBG_INIT,
1135                                 "enabling hot key handling\n");
1136                 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1137                                         | hotkey_orig_mask);
1138                 if (res)
1139                         return res;
1140
1141                 dbg_printk(TPACPI_DBG_INIT,
1142                                 "legacy hot key reporting over procfs %s\n",
1143                                 (hotkey_report_mode < 2) ?
1144                                         "enabled" : "disabled");
1145         }
1146
1147         return (tp_features.hotkey)? 0 : 1;
1148 }
1149
1150 static void hotkey_exit(void)
1151 {
1152         int res;
1153
1154         if (tp_features.hotkey) {
1155                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1156                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1157                 if (res)
1158                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1159         }
1160
1161         if (hotkey_dev_attributes) {
1162                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1163                 hotkey_dev_attributes = NULL;
1164         }
1165 }
1166
1167 static void tpacpi_input_send_key(unsigned int scancode,
1168                                   unsigned int keycode)
1169 {
1170         if (keycode != KEY_RESERVED) {
1171                 mutex_lock(&tpacpi_inputdev_send_mutex);
1172
1173                 input_report_key(tpacpi_inputdev, keycode, 1);
1174                 if (keycode == KEY_UNKNOWN)
1175                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1176                                     scancode);
1177                 input_sync(tpacpi_inputdev);
1178
1179                 input_report_key(tpacpi_inputdev, keycode, 0);
1180                 if (keycode == KEY_UNKNOWN)
1181                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1182                                     scancode);
1183                 input_sync(tpacpi_inputdev);
1184
1185                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1186         }
1187 }
1188
1189 static void tpacpi_input_send_radiosw(void)
1190 {
1191         int wlsw;
1192
1193         mutex_lock(&tpacpi_inputdev_send_mutex);
1194
1195         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1196                 input_report_switch(tpacpi_inputdev,
1197                                     SW_RADIO, !!wlsw);
1198                 input_sync(tpacpi_inputdev);
1199         }
1200
1201         mutex_unlock(&tpacpi_inputdev_send_mutex);
1202 }
1203
1204 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1205 {
1206         u32 hkey;
1207         unsigned int keycode, scancode;
1208         int send_acpi_ev;
1209         int ignore_acpi_ev;
1210
1211         if (event != 0x80) {
1212                 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
1213                 /* forward it to userspace, maybe it knows how to handle it */
1214                 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1215                                                 ibm->acpi->device->dev.bus_id,
1216                                                 event, 0);
1217                 return;
1218         }
1219
1220         while (1) {
1221                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1222                         printk(IBM_ERR "failed to retrieve HKEY event\n");
1223                         return;
1224                 }
1225
1226                 if (hkey == 0) {
1227                         /* queue empty */
1228                         return;
1229                 }
1230
1231                 send_acpi_ev = 0;
1232                 ignore_acpi_ev = 0;
1233
1234                 switch (hkey >> 12) {
1235                 case 1:
1236                         /* 0x1000-0x1FFF: key presses */
1237                         scancode = hkey & 0xfff;
1238                         if (scancode > 0 && scancode < 0x21) {
1239                                 scancode--;
1240                                 keycode = hotkey_keycode_map[scancode];
1241                                 tpacpi_input_send_key(scancode, keycode);
1242                         } else {
1243                                 printk(IBM_ERR
1244                                        "hotkey 0x%04x out of range for keyboard map\n",
1245                                        hkey);
1246                                 send_acpi_ev = 1;
1247                         }
1248                         break;
1249                 case 5:
1250                         /* 0x5000-0x5FFF: LID */
1251                         /* we don't handle it through this path, just
1252                          * eat up known LID events */
1253                         if (hkey != 0x5001 && hkey != 0x5002) {
1254                                 printk(IBM_ERR
1255                                        "unknown LID-related HKEY event: 0x%04x\n",
1256                                        hkey);
1257                                 send_acpi_ev = 1;
1258                         } else {
1259                                 ignore_acpi_ev = 1;
1260                         }
1261                         break;
1262                 case 7:
1263                         /* 0x7000-0x7FFF: misc */
1264                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1265                                 tpacpi_input_send_radiosw();
1266                                 break;
1267                         }
1268                         /* fallthrough to default */
1269                 default:
1270                         /* case 2: dock-related */
1271                         /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1272                         /* case 3: ultra-bay related. maybe bay in dock? */
1273                         /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1274                         printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1275                         send_acpi_ev = 1;
1276                 }
1277
1278                 /* Legacy events */
1279                 if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
1280                         acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1281                 }
1282
1283                 /* netlink events */
1284                 if (!ignore_acpi_ev && send_acpi_ev) {
1285                         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1286                                                         ibm->acpi->device->dev.bus_id,
1287                                                         event, hkey);
1288                 }
1289         }
1290 }
1291
1292 static void hotkey_resume(void)
1293 {
1294         tpacpi_input_send_radiosw();
1295 }
1296
1297 /*
1298  * Call with hotkey_mutex held
1299  */
1300 static int hotkey_get(int *status, u32 *mask)
1301 {
1302         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1303                 return -EIO;
1304
1305         if (tp_features.hotkey_mask)
1306                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1307                         return -EIO;
1308
1309         return 0;
1310 }
1311
1312 /*
1313  * Call with hotkey_mutex held
1314  */
1315 static int hotkey_set(int status, u32 mask)
1316 {
1317         int i;
1318
1319         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1320                 return -EIO;
1321
1322         if (tp_features.hotkey_mask)
1323                 for (i = 0; i < 32; i++) {
1324                         int bit = ((1 << i) & mask) != 0;
1325                         if (!acpi_evalf(hkey_handle,
1326                                         NULL, "MHKM", "vdd", i + 1, bit))
1327                                 return -EIO;
1328                 }
1329
1330         return 0;
1331 }
1332
1333 /* procfs -------------------------------------------------------------- */
1334 static int hotkey_read(char *p)
1335 {
1336         int res, status;
1337         u32 mask;
1338         int len = 0;
1339
1340         if (!tp_features.hotkey) {
1341                 len += sprintf(p + len, "status:\t\tnot supported\n");
1342                 return len;
1343         }
1344
1345         if (mutex_lock_interruptible(&hotkey_mutex))
1346                 return -ERESTARTSYS;
1347         res = hotkey_get(&status, &mask);
1348         mutex_unlock(&hotkey_mutex);
1349         if (res)
1350                 return res;
1351
1352         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1353         if (tp_features.hotkey_mask) {
1354                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1355                 len += sprintf(p + len,
1356                                "commands:\tenable, disable, reset, <mask>\n");
1357         } else {
1358                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1359                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1360         }
1361
1362         return len;
1363 }
1364
1365 static int hotkey_write(char *buf)
1366 {
1367         int res, status;
1368         u32 mask;
1369         char *cmd;
1370         int do_cmd = 0;
1371
1372         if (!tp_features.hotkey)
1373                 return -ENODEV;
1374
1375         if (mutex_lock_interruptible(&hotkey_mutex))
1376                 return -ERESTARTSYS;
1377
1378         res = hotkey_get(&status, &mask);
1379         if (res)
1380                 goto errexit;
1381
1382         res = 0;
1383         while ((cmd = next_cmd(&buf))) {
1384                 if (strlencmp(cmd, "enable") == 0) {
1385                         status = 1;
1386                 } else if (strlencmp(cmd, "disable") == 0) {
1387                         status = 0;
1388                 } else if (strlencmp(cmd, "reset") == 0) {
1389                         status = hotkey_orig_status;
1390                         mask = hotkey_orig_mask;
1391                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1392                         /* mask set */
1393                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1394                         /* mask set */
1395                 } else {
1396                         res = -EINVAL;
1397                         goto errexit;
1398                 }
1399                 do_cmd = 1;
1400         }
1401
1402         if (do_cmd)
1403                 res = hotkey_set(status, mask);
1404
1405 errexit:
1406         mutex_unlock(&hotkey_mutex);
1407         return res;
1408 }
1409
1410 static const struct acpi_device_id ibm_htk_device_ids[] = {
1411         {IBM_HKEY_HID, 0},
1412         {"", 0},
1413 };
1414
1415 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1416         .hid = ibm_htk_device_ids,
1417         .notify = hotkey_notify,
1418         .handle = &hkey_handle,
1419         .type = ACPI_DEVICE_NOTIFY,
1420 };
1421
1422 static struct ibm_struct hotkey_driver_data = {
1423         .name = "hotkey",
1424         .read = hotkey_read,
1425         .write = hotkey_write,
1426         .exit = hotkey_exit,
1427         .resume = hotkey_resume,
1428         .acpi = &ibm_hotkey_acpidriver,
1429 };
1430
1431 /*************************************************************************
1432  * Bluetooth subdriver
1433  */
1434
1435 /* sysfs bluetooth enable ---------------------------------------------- */
1436 static ssize_t bluetooth_enable_show(struct device *dev,
1437                            struct device_attribute *attr,
1438                            char *buf)
1439 {
1440         int status;
1441
1442         status = bluetooth_get_radiosw();
1443         if (status < 0)
1444                 return status;
1445
1446         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1447 }
1448
1449 static ssize_t bluetooth_enable_store(struct device *dev,
1450                             struct device_attribute *attr,
1451                             const char *buf, size_t count)
1452 {
1453         unsigned long t;
1454         int res;
1455
1456         if (parse_strtoul(buf, 1, &t))
1457                 return -EINVAL;
1458
1459         res = bluetooth_set_radiosw(t);
1460
1461         return (res) ? res : count;
1462 }
1463
1464 static struct device_attribute dev_attr_bluetooth_enable =
1465         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1466                 bluetooth_enable_show, bluetooth_enable_store);
1467
1468 /* --------------------------------------------------------------------- */
1469
1470 static struct attribute *bluetooth_attributes[] = {
1471         &dev_attr_bluetooth_enable.attr,
1472         NULL
1473 };
1474
1475 static const struct attribute_group bluetooth_attr_group = {
1476         .attrs = bluetooth_attributes,
1477 };
1478
1479 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1480 {
1481         int res;
1482         int status = 0;
1483
1484         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1485
1486         IBM_ACPIHANDLE_INIT(hkey);
1487
1488         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1489            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1490         tp_features.bluetooth = hkey_handle &&
1491             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1492
1493         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1494                 str_supported(tp_features.bluetooth),
1495                 status);
1496
1497         if (tp_features.bluetooth) {
1498                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1499                         /* no bluetooth hardware present in system */
1500                         tp_features.bluetooth = 0;
1501                         dbg_printk(TPACPI_DBG_INIT,
1502                                    "bluetooth hardware not installed\n");
1503                 } else {
1504                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1505                                         &bluetooth_attr_group);
1506                         if (res)
1507                                 return res;
1508                 }
1509         }
1510
1511         return (tp_features.bluetooth)? 0 : 1;
1512 }
1513
1514 static void bluetooth_exit(void)
1515 {
1516         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1517                         &bluetooth_attr_group);
1518 }
1519
1520 static int bluetooth_get_radiosw(void)
1521 {
1522         int status;
1523
1524         if (!tp_features.bluetooth)
1525                 return -ENODEV;
1526
1527         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1528                 return -EIO;
1529
1530         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1531 }
1532
1533 static int bluetooth_set_radiosw(int radio_on)
1534 {
1535         int status;
1536
1537         if (!tp_features.bluetooth)
1538                 return -ENODEV;
1539
1540         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1541                 return -EIO;
1542         if (radio_on)
1543                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1544         else
1545                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1546         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1547                 return -EIO;
1548
1549         return 0;
1550 }
1551
1552 /* procfs -------------------------------------------------------------- */
1553 static int bluetooth_read(char *p)
1554 {
1555         int len = 0;
1556         int status = bluetooth_get_radiosw();
1557
1558         if (!tp_features.bluetooth)
1559                 len += sprintf(p + len, "status:\t\tnot supported\n");
1560         else {
1561                 len += sprintf(p + len, "status:\t\t%s\n",
1562                                 (status)? "enabled" : "disabled");
1563                 len += sprintf(p + len, "commands:\tenable, disable\n");
1564         }
1565
1566         return len;
1567 }
1568
1569 static int bluetooth_write(char *buf)
1570 {
1571         char *cmd;
1572
1573         if (!tp_features.bluetooth)
1574                 return -ENODEV;
1575
1576         while ((cmd = next_cmd(&buf))) {
1577                 if (strlencmp(cmd, "enable") == 0) {
1578                         bluetooth_set_radiosw(1);
1579                 } else if (strlencmp(cmd, "disable") == 0) {
1580                         bluetooth_set_radiosw(0);
1581                 } else
1582                         return -EINVAL;
1583         }
1584
1585         return 0;
1586 }
1587
1588 static struct ibm_struct bluetooth_driver_data = {
1589         .name = "bluetooth",
1590         .read = bluetooth_read,
1591         .write = bluetooth_write,
1592         .exit = bluetooth_exit,
1593 };
1594
1595 /*************************************************************************
1596  * Wan subdriver
1597  */
1598
1599 /* sysfs wan enable ---------------------------------------------------- */
1600 static ssize_t wan_enable_show(struct device *dev,
1601                            struct device_attribute *attr,
1602                            char *buf)
1603 {
1604         int status;
1605
1606         status = wan_get_radiosw();
1607         if (status < 0)
1608                 return status;
1609
1610         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1611 }
1612
1613 static ssize_t wan_enable_store(struct device *dev,
1614                             struct device_attribute *attr,
1615                             const char *buf, size_t count)
1616 {
1617         unsigned long t;
1618         int res;
1619
1620         if (parse_strtoul(buf, 1, &t))
1621                 return -EINVAL;
1622
1623         res = wan_set_radiosw(t);
1624
1625         return (res) ? res : count;
1626 }
1627
1628 static struct device_attribute dev_attr_wan_enable =
1629         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1630                 wan_enable_show, wan_enable_store);
1631
1632 /* --------------------------------------------------------------------- */
1633
1634 static struct attribute *wan_attributes[] = {
1635         &dev_attr_wan_enable.attr,
1636         NULL
1637 };
1638
1639 static const struct attribute_group wan_attr_group = {
1640         .attrs = wan_attributes,
1641 };
1642
1643 static int __init wan_init(struct ibm_init_struct *iibm)
1644 {
1645         int res;
1646         int status = 0;
1647
1648         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1649
1650         IBM_ACPIHANDLE_INIT(hkey);
1651
1652         tp_features.wan = hkey_handle &&
1653             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1654
1655         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1656                 str_supported(tp_features.wan),
1657                 status);
1658
1659         if (tp_features.wan) {
1660                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1661                         /* no wan hardware present in system */
1662                         tp_features.wan = 0;
1663                         dbg_printk(TPACPI_DBG_INIT,
1664                                    "wan hardware not installed\n");
1665                 } else {
1666                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1667                                         &wan_attr_group);
1668                         if (res)
1669                                 return res;
1670                 }
1671         }
1672
1673         return (tp_features.wan)? 0 : 1;
1674 }
1675
1676 static void wan_exit(void)
1677 {
1678         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1679                 &wan_attr_group);
1680 }
1681
1682 static int wan_get_radiosw(void)
1683 {
1684         int status;
1685
1686         if (!tp_features.wan)
1687                 return -ENODEV;
1688
1689         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1690                 return -EIO;
1691
1692         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1693 }
1694
1695 static int wan_set_radiosw(int radio_on)
1696 {
1697         int status;
1698
1699         if (!tp_features.wan)
1700                 return -ENODEV;
1701
1702         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1703                 return -EIO;
1704         if (radio_on)
1705                 status |= TP_ACPI_WANCARD_RADIOSSW;
1706         else
1707                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1708         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1709                 return -EIO;
1710
1711         return 0;
1712 }
1713
1714 /* procfs -------------------------------------------------------------- */
1715 static int wan_read(char *p)
1716 {
1717         int len = 0;
1718         int status = wan_get_radiosw();
1719
1720         if (!tp_features.wan)
1721                 len += sprintf(p + len, "status:\t\tnot supported\n");
1722         else {
1723                 len += sprintf(p + len, "status:\t\t%s\n",
1724                                 (status)? "enabled" : "disabled");
1725                 len += sprintf(p + len, "commands:\tenable, disable\n");
1726         }
1727
1728         return len;
1729 }
1730
1731 static int wan_write(char *buf)
1732 {
1733         char *cmd;
1734
1735         if (!tp_features.wan)
1736                 return -ENODEV;
1737
1738         while ((cmd = next_cmd(&buf))) {
1739                 if (strlencmp(cmd, "enable") == 0) {
1740                         wan_set_radiosw(1);
1741                 } else if (strlencmp(cmd, "disable") == 0) {
1742                         wan_set_radiosw(0);
1743                 } else
1744                         return -EINVAL;
1745         }
1746
1747         return 0;
1748 }
1749
1750 static struct ibm_struct wan_driver_data = {
1751         .name = "wan",
1752         .read = wan_read,
1753         .write = wan_write,
1754         .exit = wan_exit,
1755         .flags.experimental = 1,
1756 };
1757
1758 /*************************************************************************
1759  * Video subdriver
1760  */
1761
1762 static enum video_access_mode video_supported;
1763 static int video_orig_autosw;
1764
1765 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1766            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1767            "\\_SB.PCI0.VID0",   /* 770e */
1768            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1769            "\\_SB.PCI0.AGP.VID",        /* all others */
1770            );                           /* R30, R31 */
1771
1772 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1773
1774 static int __init video_init(struct ibm_init_struct *iibm)
1775 {
1776         int ivga;
1777
1778         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1779
1780         IBM_ACPIHANDLE_INIT(vid);
1781         IBM_ACPIHANDLE_INIT(vid2);
1782
1783         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1784                 /* G41, assume IVGA doesn't change */
1785                 vid_handle = vid2_handle;
1786
1787         if (!vid_handle)
1788                 /* video switching not supported on R30, R31 */
1789                 video_supported = TPACPI_VIDEO_NONE;
1790         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1791                 /* 570 */
1792                 video_supported = TPACPI_VIDEO_570;
1793         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1794                 /* 600e/x, 770e, 770x */
1795                 video_supported = TPACPI_VIDEO_770;
1796         else
1797                 /* all others */
1798                 video_supported = TPACPI_VIDEO_NEW;
1799
1800         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1801                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1802                 video_supported);
1803
1804         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1805 }
1806
1807 static void video_exit(void)
1808 {
1809         dbg_printk(TPACPI_DBG_EXIT,
1810                    "restoring original video autoswitch mode\n");
1811         if (video_autosw_set(video_orig_autosw))
1812                 printk(IBM_ERR "error while trying to restore original "
1813                         "video autoswitch mode\n");
1814 }
1815
1816 static int video_outputsw_get(void)
1817 {
1818         int status = 0;
1819         int i;
1820
1821         switch (video_supported) {
1822         case TPACPI_VIDEO_570:
1823                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1824                                  TP_ACPI_VIDEO_570_PHSCMD))
1825                         return -EIO;
1826                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1827                 break;
1828         case TPACPI_VIDEO_770:
1829                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1830                         return -EIO;
1831                 if (i)
1832                         status |= TP_ACPI_VIDEO_S_LCD;
1833                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1834                         return -EIO;
1835                 if (i)
1836                         status |= TP_ACPI_VIDEO_S_CRT;
1837                 break;
1838         case TPACPI_VIDEO_NEW:
1839                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1840                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1841                         return -EIO;
1842                 if (i)
1843                         status |= TP_ACPI_VIDEO_S_CRT;
1844
1845                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1846                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1847                         return -EIO;
1848                 if (i)
1849                         status |= TP_ACPI_VIDEO_S_LCD;
1850                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1851                         return -EIO;
1852                 if (i)
1853                         status |= TP_ACPI_VIDEO_S_DVI;
1854                 break;
1855         default:
1856                 return -ENOSYS;
1857         }
1858
1859         return status;
1860 }
1861
1862 static int video_outputsw_set(int status)
1863 {
1864         int autosw;
1865         int res = 0;
1866
1867         switch (video_supported) {
1868         case TPACPI_VIDEO_570:
1869                 res = acpi_evalf(NULL, NULL,
1870                                  "\\_SB.PHS2", "vdd",
1871                                  TP_ACPI_VIDEO_570_PHS2CMD,
1872                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1873                 break;
1874         case TPACPI_VIDEO_770:
1875                 autosw = video_autosw_get();
1876                 if (autosw < 0)
1877                         return autosw;
1878
1879                 res = video_autosw_set(1);
1880                 if (res)
1881                         return res;
1882                 res = acpi_evalf(vid_handle, NULL,
1883                                  "ASWT", "vdd", status * 0x100, 0);
1884                 if (!autosw && video_autosw_set(autosw)) {
1885                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1886                         return -EIO;
1887                 }
1888                 break;
1889         case TPACPI_VIDEO_NEW:
1890                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1891                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1892                 break;
1893         default:
1894                 return -ENOSYS;
1895         }
1896
1897         return (res)? 0 : -EIO;
1898 }
1899
1900 static int video_autosw_get(void)
1901 {
1902         int autosw = 0;
1903
1904         switch (video_supported) {
1905         case TPACPI_VIDEO_570:
1906                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1907                         return -EIO;
1908                 break;
1909         case TPACPI_VIDEO_770:
1910         case TPACPI_VIDEO_NEW:
1911                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1912                         return -EIO;
1913                 break;
1914         default:
1915                 return -ENOSYS;
1916         }
1917
1918         return autosw & 1;
1919 }
1920
1921 static int video_autosw_set(int enable)
1922 {
1923         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1924                 return -EIO;
1925         return 0;
1926 }
1927
1928 static int video_outputsw_cycle(void)
1929 {
1930         int autosw = video_autosw_get();
1931         int res;
1932
1933         if (autosw < 0)
1934                 return autosw;
1935
1936         switch (video_supported) {
1937         case TPACPI_VIDEO_570:
1938                 res = video_autosw_set(1);
1939                 if (res)
1940                         return res;
1941                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1942                 break;
1943         case TPACPI_VIDEO_770:
1944         case TPACPI_VIDEO_NEW:
1945                 res = video_autosw_set(1);
1946                 if (res)
1947                         return res;
1948                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1949                 break;
1950         default:
1951                 return -ENOSYS;
1952         }
1953         if (!autosw && video_autosw_set(autosw)) {
1954                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1955                 return -EIO;
1956         }
1957
1958         return (res)? 0 : -EIO;
1959 }
1960
1961 static int video_expand_toggle(void)
1962 {
1963         switch (video_supported) {
1964         case TPACPI_VIDEO_570:
1965                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1966                         0 : -EIO;
1967         case TPACPI_VIDEO_770:
1968                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1969                         0 : -EIO;
1970         case TPACPI_VIDEO_NEW:
1971                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1972                         0 : -EIO;
1973         default:
1974                 return -ENOSYS;
1975         }
1976         /* not reached */
1977 }
1978
1979 static int video_read(char *p)
1980 {
1981         int status, autosw;
1982         int len = 0;
1983
1984         if (video_supported == TPACPI_VIDEO_NONE) {
1985                 len += sprintf(p + len, "status:\t\tnot supported\n");
1986                 return len;
1987         }
1988
1989         status = video_outputsw_get();
1990         if (status < 0)
1991                 return status;
1992
1993         autosw = video_autosw_get();
1994         if (autosw < 0)
1995                 return autosw;
1996
1997         len += sprintf(p + len, "status:\t\tsupported\n");
1998         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1999         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2000         if (video_supported == TPACPI_VIDEO_NEW)
2001                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2002         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2003         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2004         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2005         if (video_supported == TPACPI_VIDEO_NEW)
2006                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2007         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2008         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2009
2010         return len;
2011 }
2012
2013 static int video_write(char *buf)
2014 {
2015         char *cmd;
2016         int enable, disable, status;
2017         int res;
2018
2019         if (video_supported == TPACPI_VIDEO_NONE)
2020                 return -ENODEV;
2021
2022         enable = 0;
2023         disable = 0;
2024
2025         while ((cmd = next_cmd(&buf))) {
2026                 if (strlencmp(cmd, "lcd_enable") == 0) {
2027                         enable |= TP_ACPI_VIDEO_S_LCD;
2028                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2029                         disable |= TP_ACPI_VIDEO_S_LCD;
2030                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2031                         enable |= TP_ACPI_VIDEO_S_CRT;
2032                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2033                         disable |= TP_ACPI_VIDEO_S_CRT;
2034                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2035                            strlencmp(cmd, "dvi_enable") == 0) {
2036                         enable |= TP_ACPI_VIDEO_S_DVI;
2037                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2038                            strlencmp(cmd, "dvi_disable") == 0) {
2039                         disable |= TP_ACPI_VIDEO_S_DVI;
2040                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2041                         res = video_autosw_set(1);
2042                         if (res)
2043                                 return res;
2044                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2045                         res = video_autosw_set(0);
2046                         if (res)
2047                                 return res;
2048                 } else if (strlencmp(cmd, "video_switch") == 0) {
2049                         res = video_outputsw_cycle();
2050                         if (res)
2051                                 return res;
2052                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2053                         res = video_expand_toggle();
2054                         if (res)
2055                                 return res;
2056                 } else
2057                         return -EINVAL;
2058         }
2059
2060         if (enable || disable) {
2061                 status = video_outputsw_get();
2062                 if (status < 0)
2063                         return status;
2064                 res = video_outputsw_set((status & ~disable) | enable);
2065                 if (res)
2066                         return res;
2067         }
2068
2069         return 0;
2070 }
2071
2072 static struct ibm_struct video_driver_data = {
2073         .name = "video",
2074         .read = video_read,
2075         .write = video_write,
2076         .exit = video_exit,
2077 };
2078
2079 /*************************************************************************
2080  * Light (thinklight) subdriver
2081  */
2082
2083 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
2084 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
2085
2086 static int __init light_init(struct ibm_init_struct *iibm)
2087 {
2088         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2089
2090         IBM_ACPIHANDLE_INIT(ledb);
2091         IBM_ACPIHANDLE_INIT(lght);
2092         IBM_ACPIHANDLE_INIT(cmos);
2093
2094         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2095         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2096
2097         if (tp_features.light)
2098                 /* light status not supported on
2099                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2100                 tp_features.light_status =
2101                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2102
2103         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2104                 str_supported(tp_features.light));
2105
2106         return (tp_features.light)? 0 : 1;
2107 }
2108
2109 static int light_read(char *p)
2110 {
2111         int len = 0;
2112         int status = 0;
2113
2114         if (!tp_features.light) {
2115                 len += sprintf(p + len, "status:\t\tnot supported\n");
2116         } else if (!tp_features.light_status) {
2117                 len += sprintf(p + len, "status:\t\tunknown\n");
2118                 len += sprintf(p + len, "commands:\ton, off\n");
2119         } else {
2120                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2121                         return -EIO;
2122                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2123                 len += sprintf(p + len, "commands:\ton, off\n");
2124         }
2125
2126         return len;
2127 }
2128
2129 static int light_write(char *buf)
2130 {
2131         int cmos_cmd, lght_cmd;
2132         char *cmd;
2133         int success;
2134
2135         if (!tp_features.light)
2136                 return -ENODEV;
2137
2138         while ((cmd = next_cmd(&buf))) {
2139                 if (strlencmp(cmd, "on") == 0) {
2140                         cmos_cmd = 0x0c;
2141                         lght_cmd = 1;
2142                 } else if (strlencmp(cmd, "off") == 0) {
2143                         cmos_cmd = 0x0d;
2144                         lght_cmd = 0;
2145                 } else
2146                         return -EINVAL;
2147
2148                 success = cmos_handle ?
2149                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2150                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2151                 if (!success)
2152                         return -EIO;
2153         }
2154
2155         return 0;
2156 }
2157
2158 static struct ibm_struct light_driver_data = {
2159         .name = "light",
2160         .read = light_read,
2161         .write = light_write,
2162 };
2163
2164 /*************************************************************************
2165  * Dock subdriver
2166  */
2167
2168 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2169
2170 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2171            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2172            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2173            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2174     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2175
2176 /* don't list other alternatives as we install a notify handler on the 570 */
2177 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2178
2179 static const struct acpi_device_id ibm_pci_device_ids[] = {
2180         {PCI_ROOT_HID_STRING, 0},
2181         {"", 0},
2182 };
2183
2184 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2185         {
2186          .notify = dock_notify,
2187          .handle = &dock_handle,
2188          .type = ACPI_SYSTEM_NOTIFY,
2189         },
2190         {
2191         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2192          * We just use it to get notifications of dock hotplug
2193          * in very old thinkpads */
2194          .hid = ibm_pci_device_ids,
2195          .notify = dock_notify,
2196          .handle = &pci_handle,
2197          .type = ACPI_SYSTEM_NOTIFY,
2198         },
2199 };
2200
2201 static struct ibm_struct dock_driver_data[2] = {
2202         {
2203          .name = "dock",
2204          .read = dock_read,
2205          .write = dock_write,
2206          .acpi = &ibm_dock_acpidriver[0],
2207         },
2208         {
2209          .name = "dock",
2210          .acpi = &ibm_dock_acpidriver[1],
2211         },
2212 };
2213
2214 #define dock_docked() (_sta(dock_handle) & 1)
2215
2216 static int __init dock_init(struct ibm_init_struct *iibm)
2217 {
2218         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2219
2220         IBM_ACPIHANDLE_INIT(dock);
2221
2222         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2223                 str_supported(dock_handle != NULL));
2224
2225         return (dock_handle)? 0 : 1;
2226 }
2227
2228 static int __init dock_init2(struct ibm_init_struct *iibm)
2229 {
2230         int dock2_needed;
2231
2232         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2233
2234         if (dock_driver_data[0].flags.acpi_driver_registered &&
2235             dock_driver_data[0].flags.acpi_notify_installed) {
2236                 IBM_ACPIHANDLE_INIT(pci);
2237                 dock2_needed = (pci_handle != NULL);
2238                 vdbg_printk(TPACPI_DBG_INIT,
2239                             "dock PCI handler for the TP 570 is %s\n",
2240                             str_supported(dock2_needed));
2241         } else {
2242                 vdbg_printk(TPACPI_DBG_INIT,
2243                 "dock subdriver part 2 not required\n");
2244                 dock2_needed = 0;
2245         }
2246
2247         return (dock2_needed)? 0 : 1;
2248 }
2249
2250 static void dock_notify(struct ibm_struct *ibm, u32 event)
2251 {
2252         int docked = dock_docked();
2253         int pci = ibm->acpi->hid && ibm->acpi->device &&
2254                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2255         int data;
2256
2257         if (event == 1 && !pci) /* 570 */
2258                 data = 1;       /* button */
2259         else if (event == 1 && pci)     /* 570 */
2260                 data = 3;       /* dock */
2261         else if (event == 3 && docked)
2262                 data = 1;       /* button */
2263         else if (event == 3 && !docked)
2264                 data = 2;       /* undock */
2265         else if (event == 0 && docked)
2266                 data = 3;       /* dock */
2267         else {
2268                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2269                        event, _sta(dock_handle));
2270                 data = 0;       /* unknown */
2271         }
2272         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2273         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2274                                           ibm->acpi->device->dev.bus_id,
2275                                           event, data);
2276 }
2277
2278 static int dock_read(char *p)
2279 {
2280         int len = 0;
2281         int docked = dock_docked();
2282
2283         if (!dock_handle)
2284                 len += sprintf(p + len, "status:\t\tnot supported\n");
2285         else if (!docked)
2286                 len += sprintf(p + len, "status:\t\tundocked\n");
2287         else {
2288                 len += sprintf(p + len, "status:\t\tdocked\n");
2289                 len += sprintf(p + len, "commands:\tdock, undock\n");
2290         }
2291
2292         return len;
2293 }
2294
2295 static int dock_write(char *buf)
2296 {
2297         char *cmd;
2298
2299         if (!dock_docked())
2300                 return -ENODEV;
2301
2302         while ((cmd = next_cmd(&buf))) {
2303                 if (strlencmp(cmd, "undock") == 0) {
2304                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2305                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2306                                 return -EIO;
2307                 } else if (strlencmp(cmd, "dock") == 0) {
2308                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2309                                 return -EIO;
2310                 } else
2311                         return -EINVAL;
2312         }
2313
2314         return 0;
2315 }
2316
2317 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2318
2319 /*************************************************************************
2320  * Bay subdriver
2321  */
2322
2323 #ifdef CONFIG_THINKPAD_ACPI_BAY
2324 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2325            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2326            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2327            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2328            );                           /* A21e, R30, R31 */
2329 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2330            "_EJ0",              /* all others */
2331            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2332 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2333            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2334            );                           /* all others */
2335 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2336            "_EJ0",                      /* 770x */
2337            );                           /* all others */
2338
2339 static int __init bay_init(struct ibm_init_struct *iibm)
2340 {
2341         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2342
2343         IBM_ACPIHANDLE_INIT(bay);
2344         if (bay_handle)
2345                 IBM_ACPIHANDLE_INIT(bay_ej);
2346         IBM_ACPIHANDLE_INIT(bay2);
2347         if (bay2_handle)
2348                 IBM_ACPIHANDLE_INIT(bay2_ej);
2349
2350         tp_features.bay_status = bay_handle &&
2351                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2352         tp_features.bay_status2 = bay2_handle &&
2353                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2354
2355         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2356                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2357         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2358                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2359
2360         vdbg_printk(TPACPI_DBG_INIT,
2361                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2362                 str_supported(tp_features.bay_status),
2363                 str_supported(tp_features.bay_eject),
2364                 str_supported(tp_features.bay_status2),
2365                 str_supported(tp_features.bay_eject2));
2366
2367         return (tp_features.bay_status || tp_features.bay_eject ||
2368                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2369 }
2370
2371 static void bay_notify(struct ibm_struct *ibm, u32 event)
2372 {
2373         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2374         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2375                                           ibm->acpi->device->dev.bus_id,
2376                                           event, 0);
2377 }
2378
2379 #define bay_occupied(b) (_sta(b##_handle) & 1)
2380
2381 static int bay_read(char *p)
2382 {
2383         int len = 0;
2384         int occupied = bay_occupied(bay);
2385         int occupied2 = bay_occupied(bay2);
2386         int eject, eject2;
2387
2388         len += sprintf(p + len, "status:\t\t%s\n",
2389                 tp_features.bay_status ?
2390                         (occupied ? "occupied" : "unoccupied") :
2391                                 "not supported");
2392         if (tp_features.bay_status2)
2393                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2394                                "occupied" : "unoccupied");
2395
2396         eject = tp_features.bay_eject && occupied;
2397         eject2 = tp_features.bay_eject2 && occupied2;
2398
2399         if (eject && eject2)
2400                 len += sprintf(p + len, "commands:\teject, eject2\n");
2401         else if (eject)
2402                 len += sprintf(p + len, "commands:\teject\n");
2403         else if (eject2)
2404                 len += sprintf(p + len, "commands:\teject2\n");
2405
2406         return len;
2407 }
2408
2409 static int bay_write(char *buf)
2410 {
2411         char *cmd;
2412
2413         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2414                 return -ENODEV;
2415
2416         while ((cmd = next_cmd(&buf))) {
2417                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2418                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2419                                 return -EIO;
2420                 } else if (tp_features.bay_eject2 &&
2421                            strlencmp(cmd, "eject2") == 0) {
2422                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2423                                 return -EIO;
2424                 } else
2425                         return -EINVAL;
2426         }
2427
2428         return 0;
2429 }
2430
2431 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2432         .notify = bay_notify,
2433         .handle = &bay_handle,
2434         .type = ACPI_SYSTEM_NOTIFY,
2435 };
2436
2437 static struct ibm_struct bay_driver_data = {
2438         .name = "bay",
2439         .read = bay_read,
2440         .write = bay_write,
2441         .acpi = &ibm_bay_acpidriver,
2442 };
2443
2444 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2445
2446 /*************************************************************************
2447  * CMOS subdriver
2448  */
2449
2450 /* sysfs cmos_command -------------------------------------------------- */
2451 static ssize_t cmos_command_store(struct device *dev,
2452                             struct device_attribute *attr,
2453                             const char *buf, size_t count)
2454 {
2455         unsigned long cmos_cmd;
2456         int res;
2457
2458         if (parse_strtoul(buf, 21, &cmos_cmd))
2459                 return -EINVAL;
2460
2461         res = issue_thinkpad_cmos_command(cmos_cmd);
2462         return (res)? res : count;
2463 }
2464
2465 static struct device_attribute dev_attr_cmos_command =
2466         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2467
2468 /* --------------------------------------------------------------------- */
2469
2470 static int __init cmos_init(struct ibm_init_struct *iibm)
2471 {
2472         int res;
2473
2474         vdbg_printk(TPACPI_DBG_INIT,
2475                 "initializing cmos commands subdriver\n");
2476
2477         IBM_ACPIHANDLE_INIT(cmos);
2478
2479         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2480                 str_supported(cmos_handle != NULL));
2481
2482         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2483         if (res)
2484                 return res;
2485
2486         return (cmos_handle)? 0 : 1;
2487 }
2488
2489 static void cmos_exit(void)
2490 {
2491         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2492 }
2493
2494 static int cmos_read(char *p)
2495 {
2496         int len = 0;
2497
2498         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2499            R30, R31, T20-22, X20-21 */
2500         if (!cmos_handle)
2501                 len += sprintf(p + len, "status:\t\tnot supported\n");
2502         else {
2503                 len += sprintf(p + len, "status:\t\tsupported\n");
2504                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2505         }
2506
2507         return len;
2508 }
2509
2510 static int cmos_write(char *buf)
2511 {
2512         char *cmd;
2513         int cmos_cmd, res;
2514
2515         while ((cmd = next_cmd(&buf))) {
2516                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2517                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2518                         /* cmos_cmd set */
2519                 } else
2520                         return -EINVAL;
2521
2522                 res = issue_thinkpad_cmos_command(cmos_cmd);
2523                 if (res)
2524                         return res;
2525         }
2526
2527         return 0;
2528 }
2529
2530 static struct ibm_struct cmos_driver_data = {
2531         .name = "cmos",
2532         .read = cmos_read,
2533         .write = cmos_write,
2534         .exit = cmos_exit,
2535 };
2536
2537 /*************************************************************************
2538  * LED subdriver
2539  */
2540
2541 static enum led_access_mode led_supported;
2542
2543 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2544            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2545            "LED",               /* all others */
2546            );                   /* R30, R31 */
2547
2548 static int __init led_init(struct ibm_init_struct *iibm)
2549 {
2550         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2551
2552         IBM_ACPIHANDLE_INIT(led);
2553
2554         if (!led_handle)
2555                 /* led not supported on R30, R31 */
2556                 led_supported = TPACPI_LED_NONE;
2557         else if (strlencmp(led_path, "SLED") == 0)
2558                 /* 570 */
2559                 led_supported = TPACPI_LED_570;
2560         else if (strlencmp(led_path, "SYSL") == 0)
2561                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2562                 led_supported = TPACPI_LED_OLD;
2563         else
2564                 /* all others */
2565                 led_supported = TPACPI_LED_NEW;
2566
2567         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2568                 str_supported(led_supported), led_supported);
2569
2570         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2571 }
2572
2573 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2574
2575 static int led_read(char *p)
2576 {
2577         int len = 0;
2578
2579         if (!led_supported) {
2580                 len += sprintf(p + len, "status:\t\tnot supported\n");
2581                 return len;
2582         }
2583         len += sprintf(p + len, "status:\t\tsupported\n");
2584
2585         if (led_supported == TPACPI_LED_570) {
2586                 /* 570 */
2587                 int i, status;
2588                 for (i = 0; i < 8; i++) {
2589                         if (!acpi_evalf(ec_handle,
2590                                         &status, "GLED", "dd", 1 << i))
2591                                 return -EIO;
2592                         len += sprintf(p + len, "%d:\t\t%s\n",
2593                                        i, led_status(status));
2594                 }
2595         }
2596
2597         len += sprintf(p + len, "commands:\t"
2598                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2599
2600         return len;
2601 }
2602
2603 /* off, on, blink */
2604 static const int led_sled_arg1[] = { 0, 1, 3 };
2605 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2606 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2607 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2608
2609 static int led_write(char *buf)
2610 {
2611         char *cmd;
2612         int led, ind, ret;
2613
2614         if (!led_supported)
2615                 return -ENODEV;
2616
2617         while ((cmd = next_cmd(&buf))) {
2618                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2619                         return -EINVAL;
2620
2621                 if (strstr(cmd, "off")) {
2622                         ind = 0;
2623                 } else if (strstr(cmd, "on")) {
2624                         ind = 1;
2625                 } else if (strstr(cmd, "blink")) {
2626                         ind = 2;
2627                 } else
2628                         return -EINVAL;
2629
2630                 if (led_supported == TPACPI_LED_570) {
2631                         /* 570 */
2632                         led = 1 << led;
2633                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2634                                         led, led_sled_arg1[ind]))
2635                                 return -EIO;
2636                 } else if (led_supported == TPACPI_LED_OLD) {
2637                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2638                         led = 1 << led;
2639                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2640                         if (ret >= 0)
2641                                 ret =
2642                                     ec_write(TPACPI_LED_EC_HLBL,
2643                                              led * led_exp_hlbl[ind]);
2644                         if (ret >= 0)
2645                                 ret =
2646                                     ec_write(TPACPI_LED_EC_HLCL,
2647                                              led * led_exp_hlcl[ind]);
2648                         if (ret < 0)
2649                                 return ret;
2650                 } else {
2651                         /* all others */
2652                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2653                                         led, led_led_arg1[ind]))
2654                                 return -EIO;
2655                 }
2656         }
2657
2658         return 0;
2659 }
2660
2661 static struct ibm_struct led_driver_data = {
2662         .name = "led",
2663         .read = led_read,
2664         .write = led_write,
2665 };
2666
2667 /*************************************************************************
2668  * Beep subdriver
2669  */
2670
2671 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2672
2673 static int __init beep_init(struct ibm_init_struct *iibm)
2674 {
2675         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2676
2677         IBM_ACPIHANDLE_INIT(beep);
2678
2679         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2680                 str_supported(beep_handle != NULL));
2681
2682         return (beep_handle)? 0 : 1;
2683 }
2684
2685 static int beep_read(char *p)
2686 {
2687         int len = 0;
2688
2689         if (!beep_handle)
2690                 len += sprintf(p + len, "status:\t\tnot supported\n");
2691         else {
2692                 len += sprintf(p + len, "status:\t\tsupported\n");
2693                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2694         }
2695
2696         return len;
2697 }
2698
2699 static int beep_write(char *buf)
2700 {
2701         char *cmd;
2702         int beep_cmd;
2703
2704         if (!beep_handle)
2705                 return -ENODEV;
2706
2707         while ((cmd = next_cmd(&buf))) {
2708                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2709                     beep_cmd >= 0 && beep_cmd <= 17) {
2710                         /* beep_cmd set */
2711                 } else
2712                         return -EINVAL;
2713                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2714                         return -EIO;
2715         }
2716
2717         return 0;
2718 }
2719
2720 static struct ibm_struct beep_driver_data = {
2721         .name = "beep",
2722         .read = beep_read,
2723         .write = beep_write,
2724 };
2725
2726 /*************************************************************************
2727  * Thermal subdriver
2728  */
2729
2730 static enum thermal_access_mode thermal_read_mode;
2731
2732 /* sysfs temp##_input -------------------------------------------------- */
2733
2734 static ssize_t thermal_temp_input_show(struct device *dev,
2735                            struct device_attribute *attr,
2736                            char *buf)
2737 {
2738         struct sensor_device_attribute *sensor_attr =
2739                                         to_sensor_dev_attr(attr);
2740         int idx = sensor_attr->index;
2741         s32 value;
2742         int res;
2743
2744         res = thermal_get_sensor(idx, &value);
2745         if (res)
2746                 return res;
2747         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2748                 return -ENXIO;
2749
2750         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2751 }
2752
2753 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2754          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2755
2756 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2757         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2758         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2759         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2760         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2761         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2762         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2763         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2764         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2765         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2766         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2767         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2768         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2769         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2770         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2771         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2772         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2773 };
2774
2775 #define THERMAL_ATTRS(X) \
2776         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2777
2778 static struct attribute *thermal_temp_input_attr[] = {
2779         THERMAL_ATTRS(8),
2780         THERMAL_ATTRS(9),
2781         THERMAL_ATTRS(10),
2782         THERMAL_ATTRS(11),
2783         THERMAL_ATTRS(12),
2784         THERMAL_ATTRS(13),
2785         THERMAL_ATTRS(14),
2786         THERMAL_ATTRS(15),
2787         THERMAL_ATTRS(0),
2788         THERMAL_ATTRS(1),
2789         THERMAL_ATTRS(2),
2790         THERMAL_ATTRS(3),
2791         THERMAL_ATTRS(4),
2792         THERMAL_ATTRS(5),
2793         THERMAL_ATTRS(6),
2794         THERMAL_ATTRS(7),
2795         NULL
2796 };
2797
2798 static const struct attribute_group thermal_temp_input16_group = {
2799         .attrs = thermal_temp_input_attr
2800 };
2801
2802 static const struct attribute_group thermal_temp_input8_group = {
2803         .attrs = &thermal_temp_input_attr[8]
2804 };
2805
2806 #undef THERMAL_SENSOR_ATTR_TEMP
2807 #undef THERMAL_ATTRS
2808
2809 /* --------------------------------------------------------------------- */
2810
2811 static int __init thermal_init(struct ibm_init_struct *iibm)
2812 {
2813         u8 t, ta1, ta2;
2814         int i;
2815         int acpi_tmp7;
2816         int res;
2817
2818         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2819
2820         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2821
2822         if (thinkpad_id.ec_model) {
2823                 /*
2824                  * Direct EC access mode: sensors at registers
2825                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2826                  * non-implemented, thermal sensors return 0x80 when
2827                  * not available
2828                  */
2829
2830                 ta1 = ta2 = 0;
2831                 for (i = 0; i < 8; i++) {
2832                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2833                                 ta1 |= t;
2834                         } else {
2835                                 ta1 = 0;
2836                                 break;
2837                         }
2838                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2839                                 ta2 |= t;
2840                         } else {
2841                                 ta1 = 0;
2842                                 break;
2843                         }
2844                 }
2845                 if (ta1 == 0) {
2846                         /* This is sheer paranoia, but we handle it anyway */
2847                         if (acpi_tmp7) {
2848                                 printk(IBM_ERR
2849                                        "ThinkPad ACPI EC access misbehaving, "
2850                                        "falling back to ACPI TMPx access mode\n");
2851                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2852                         } else {
2853                                 printk(IBM_ERR
2854                                        "ThinkPad ACPI EC access misbehaving, "
2855                                        "disabling thermal sensors access\n");
2856                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2857                         }
2858                 } else {
2859                         thermal_read_mode =
2860                             (ta2 != 0) ?
2861                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2862                 }
2863         } else if (acpi_tmp7) {
2864                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2865                         /* 600e/x, 770e, 770x */
2866                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2867                 } else {
2868                         /* Standard ACPI TMPx access, max 8 sensors */
2869                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2870                 }
2871         } else {
2872                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2873                 thermal_read_mode = TPACPI_THERMAL_NONE;
2874         }
2875
2876         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2877                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2878                 thermal_read_mode);
2879
2880         switch(thermal_read_mode) {
2881         case TPACPI_THERMAL_TPEC_16:
2882                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2883                                 &thermal_temp_input16_group);
2884                 if (res)
2885                         return res;
2886                 break;
2887         case TPACPI_THERMAL_TPEC_8:
2888         case TPACPI_THERMAL_ACPI_TMP07:
2889         case TPACPI_THERMAL_ACPI_UPDT:
2890                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2891                                 &thermal_temp_input8_group);
2892                 if (res)
2893                         return res;
2894                 break;
2895         case TPACPI_THERMAL_NONE:
2896         default:
2897                 return 1;
2898         }
2899
2900         return 0;
2901 }
2902
2903 static void thermal_exit(void)
2904 {
2905         switch(thermal_read_mode) {
2906         case TPACPI_THERMAL_TPEC_16:
2907                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
2908                                    &thermal_temp_input16_group);
2909                 break;
2910         case TPACPI_THERMAL_TPEC_8:
2911         case TPACPI_THERMAL_ACPI_TMP07:
2912         case TPACPI_THERMAL_ACPI_UPDT:
2913                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
2914                                    &thermal_temp_input16_group);
2915                 break;
2916         case TPACPI_THERMAL_NONE:
2917         default:
2918                 break;
2919         }
2920 }
2921
2922 /* idx is zero-based */
2923 static int thermal_get_sensor(int idx, s32 *value)
2924 {
2925         int t;
2926         s8 tmp;
2927         char tmpi[5];
2928
2929         t = TP_EC_THERMAL_TMP0;
2930
2931         switch (thermal_read_mode) {
2932 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2933         case TPACPI_THERMAL_TPEC_16:
2934                 if (idx >= 8 && idx <= 15) {
2935                         t = TP_EC_THERMAL_TMP8;
2936                         idx -= 8;
2937                 }
2938                 /* fallthrough */
2939 #endif
2940         case TPACPI_THERMAL_TPEC_8:
2941                 if (idx <= 7) {
2942                         if (!acpi_ec_read(t + idx, &tmp))
2943                                 return -EIO;
2944                         *value = tmp * 1000;
2945                         return 0;
2946                 }
2947                 break;
2948
2949         case TPACPI_THERMAL_ACPI_UPDT:
2950                 if (idx <= 7) {
2951                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2952                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2953                                 return -EIO;
2954                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2955                                 return -EIO;
2956                         *value = (t - 2732) * 100;
2957                         return 0;
2958                 }
2959                 break;
2960
2961         case TPACPI_THERMAL_ACPI_TMP07:
2962                 if (idx <= 7) {
2963                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2964                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2965                                 return -EIO;
2966                         if (t > 127 || t < -127)
2967                                 t = TP_EC_THERMAL_TMP_NA;
2968                         *value = t * 1000;
2969                         return 0;
2970                 }
2971                 break;
2972
2973         case TPACPI_THERMAL_NONE:
2974         default:
2975                 return -ENOSYS;
2976         }
2977
2978         return -EINVAL;
2979 }
2980
2981 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2982 {
2983         int res, i;
2984         int n;
2985
2986         n = 8;
2987         i = 0;
2988
2989         if (!s)
2990                 return -EINVAL;
2991
2992         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2993                 n = 16;
2994
2995         for(i = 0 ; i < n; i++) {
2996                 res = thermal_get_sensor(i, &s->temp[i]);
2997                 if (res)
2998                         return res;
2999         }
3000
3001         return n;
3002 }
3003
3004 static int thermal_read(char *p)
3005 {
3006         int len = 0;
3007         int n, i;
3008         struct ibm_thermal_sensors_struct t;
3009
3010         n = thermal_get_sensors(&t);
3011         if (unlikely(n < 0))
3012                 return n;
3013
3014         len += sprintf(p + len, "temperatures:\t");
3015
3016         if (n > 0) {
3017                 for (i = 0; i < (n - 1); i++)
3018                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3019                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3020         } else
3021                 len += sprintf(p + len, "not supported\n");
3022
3023         return len;
3024 }
3025
3026 static struct ibm_struct thermal_driver_data = {
3027         .name = "thermal",
3028         .read = thermal_read,
3029         .exit = thermal_exit,
3030 };
3031
3032 /*************************************************************************
3033  * EC Dump subdriver
3034  */
3035
3036 static u8 ecdump_regs[256];
3037
3038 static int ecdump_read(char *p)
3039 {
3040         int len = 0;
3041         int i, j;
3042         u8 v;
3043
3044         len += sprintf(p + len, "EC      "
3045                        " +00 +01 +02 +03 +04 +05 +06 +07"
3046                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3047         for (i = 0; i < 256; i += 16) {
3048                 len += sprintf(p + len, "EC 0x%02x:", i);
3049                 for (j = 0; j < 16; j++) {
3050                         if (!acpi_ec_read(i + j, &v))
3051                                 break;
3052                         if (v != ecdump_regs[i + j])
3053                                 len += sprintf(p + len, " *%02x", v);
3054                         else
3055                                 len += sprintf(p + len, "  %02x", v);
3056                         ecdump_regs[i + j] = v;
3057                 }
3058                 len += sprintf(p + len, "\n");
3059                 if (j != 16)
3060                         break;
3061         }
3062
3063         /* These are way too dangerous to advertise openly... */
3064 #if 0
3065         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
3066                        " (<offset> is 00-ff, <value> is 00-ff)\n");
3067         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
3068                        " (<offset> is 00-ff, <value> is 0-255)\n");
3069 #endif
3070         return len;
3071 }
3072
3073 static int ecdump_write(char *buf)
3074 {
3075         char *cmd;
3076         int i, v;
3077
3078         while ((cmd = next_cmd(&buf))) {
3079                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3080                         /* i and v set */
3081                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3082                         /* i and v set */
3083                 } else
3084                         return -EINVAL;
3085                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3086                         if (!acpi_ec_write(i, v))
3087                                 return -EIO;
3088                 } else
3089                         return -EINVAL;
3090         }
3091
3092         return 0;
3093 }
3094
3095 static struct ibm_struct ecdump_driver_data = {
3096         .name = "ecdump",
3097         .read = ecdump_read,
3098         .write = ecdump_write,
3099         .flags.experimental = 1,
3100 };
3101
3102 /*************************************************************************
3103  * Backlight/brightness subdriver
3104  */
3105
3106 static struct backlight_device *ibm_backlight_device;
3107
3108 static struct backlight_ops ibm_backlight_data = {
3109         .get_brightness = brightness_get,
3110         .update_status  = brightness_update_status,
3111 };
3112
3113 static struct mutex brightness_mutex;
3114
3115 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
3116 {
3117         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
3118         union acpi_object *obj;
3119         int rc;
3120
3121         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
3122                 obj = (union acpi_object *)buffer.pointer;
3123                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
3124                         printk(IBM_ERR "Unknown BCLL data, "
3125                                "please report this to %s\n", IBM_MAIL);
3126                         rc = 0;
3127                 } else {
3128                         rc = obj->package.count;
3129                 }
3130         } else {
3131                 return 0;
3132         }
3133
3134         kfree(buffer.pointer);
3135         return rc;
3136 }
3137
3138 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
3139                                         void *context, void **rv)
3140 {
3141         char name[ACPI_PATH_SEGMENT_LENGTH];
3142         struct acpi_buffer buffer = { sizeof(name), &name };
3143
3144         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3145             !strncmp("BCLL", name, sizeof(name) - 1)) {
3146                 if (tpacpi_query_bcll_levels(handle) == 16) {
3147                         *rv = handle;
3148                         return AE_CTRL_TERMINATE;
3149                 } else {
3150                         return AE_OK;
3151                 }
3152         } else {
3153                 return AE_OK;
3154         }
3155 }
3156
3157 static int __init brightness_check_levels(void)
3158 {
3159         int status;
3160         void *found_node = NULL;
3161
3162         if (!vid_handle) {
3163                 IBM_ACPIHANDLE_INIT(vid);
3164         }
3165         if (!vid_handle)
3166                 return 0;
3167
3168         /* Search for a BCLL package with 16 levels */
3169         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
3170                                         brightness_find_bcll, NULL, &found_node);
3171
3172         return (ACPI_SUCCESS(status) && found_node != NULL);
3173 }
3174
3175 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
3176                                         void *context, void **rv)
3177 {
3178         char name[ACPI_PATH_SEGMENT_LENGTH];
3179         struct acpi_buffer buffer = { sizeof(name), &name };
3180
3181         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3182             !strncmp("_BCL", name, sizeof(name) - 1)) {
3183                 *rv = handle;
3184                 return AE_CTRL_TERMINATE;
3185         } else {
3186                 return AE_OK;
3187         }
3188 }
3189
3190 static int __init brightness_check_std_acpi_support(void)
3191 {
3192         int status;
3193         void *found_node = NULL;
3194
3195         if (!vid_handle) {
3196                 IBM_ACPIHANDLE_INIT(vid);
3197         }
3198         if (!vid_handle)
3199                 return 0;
3200
3201         /* Search for a _BCL method, but don't execute it */
3202         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
3203                                      brightness_find_bcl, NULL, &found_node);
3204
3205         return (ACPI_SUCCESS(status) && found_node != NULL);
3206 }
3207
3208 static int __init brightness_init(struct ibm_init_struct *iibm)
3209 {
3210         int b;
3211
3212         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3213
3214         mutex_init(&brightness_mutex);
3215
3216         if (!brightness_enable) {
3217                 dbg_printk(TPACPI_DBG_INIT,
3218                            "brightness support disabled by module parameter\n");
3219                 return 1;
3220         } else if (brightness_enable > 1) {
3221                 if (brightness_check_std_acpi_support()) {
3222                         printk(IBM_NOTICE
3223                                "standard ACPI backlight interface available, not loading native one...\n");
3224                         return 1;
3225                 }
3226         }
3227
3228         if (!brightness_mode) {
3229                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3230                         brightness_mode = 2;
3231                 else
3232                         brightness_mode = 3;
3233
3234                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3235                         brightness_mode);
3236         }
3237
3238         if (brightness_mode > 3)
3239                 return -EINVAL;
3240
3241         tp_features.bright_16levels =
3242                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
3243                         brightness_check_levels();
3244
3245         b = brightness_get(NULL);
3246         if (b < 0)
3247                 return 1;
3248
3249         if (tp_features.bright_16levels)
3250                 printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");
3251
3252         ibm_backlight_device = backlight_device_register(
3253                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3254                                         &ibm_backlight_data);
3255         if (IS_ERR(ibm_backlight_device)) {
3256                 printk(IBM_ERR "Could not register backlight device\n");
3257                 return PTR_ERR(ibm_backlight_device);
3258         }
3259         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3260
3261         ibm_backlight_device->props.max_brightness =
3262                                 (tp_features.bright_16levels)? 15 : 7;
3263         ibm_backlight_device->props.brightness = b;
3264         backlight_update_status(ibm_backlight_device);
3265
3266         return 0;
3267 }
3268
3269 static void brightness_exit(void)
3270 {
3271         if (ibm_backlight_device) {
3272                 vdbg_printk(TPACPI_DBG_EXIT,
3273                             "calling backlight_device_unregister()\n");
3274                 backlight_device_unregister(ibm_backlight_device);
3275                 ibm_backlight_device = NULL;
3276         }
3277 }
3278
3279 static int brightness_update_status(struct backlight_device *bd)
3280 {
3281         /* it is the backlight class's job (caller) to handle
3282          * EINTR and other errors properly */
3283         return brightness_set(
3284                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3285                  bd->props.power == FB_BLANK_UNBLANK) ?
3286                                 bd->props.brightness : 0);
3287 }
3288
3289 /*
3290  * ThinkPads can read brightness from two places: EC 0x31, or
3291  * CMOS NVRAM byte 0x5E, bits 0-3.
3292  */
3293 static int brightness_get(struct backlight_device *bd)
3294 {
3295         u8 lec = 0, lcmos = 0, level = 0;
3296
3297         if (brightness_mode & 1) {
3298                 if (!acpi_ec_read(brightness_offset, &lec))
3299                         return -EIO;
3300                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
3301                 level = lec;
3302         };
3303         if (brightness_mode & 2) {
3304                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3305                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3306                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3307                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
3308                 level = lcmos;
3309         }
3310
3311         if (brightness_mode == 3 && lec != lcmos) {
3312                 printk(IBM_ERR
3313                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3314                         "on display brightness level\n",
3315                         (unsigned int) lcmos,
3316                         (unsigned int) lec);
3317                 return -EIO;
3318         }
3319
3320         return level;
3321 }
3322
3323 /* May return EINTR which can always be mapped to ERESTARTSYS */
3324 static int brightness_set(int value)
3325 {
3326         int cmos_cmd, inc, i, res;
3327         int current_value;
3328
3329         if (value > ((tp_features.bright_16levels)? 15 : 7))
3330                 return -EINVAL;
3331
3332         res = mutex_lock_interruptible(&brightness_mutex);
3333         if (res < 0)
3334                 return res;
3335
3336         current_value = brightness_get(NULL);
3337         if (current_value < 0) {
3338                 res = current_value;
3339                 goto errout;
3340         }
3341
3342         cmos_cmd = value > current_value ?
3343                         TP_CMOS_BRIGHTNESS_UP :
3344                         TP_CMOS_BRIGHTNESS_DOWN;
3345         inc = (value > current_value)? 1 : -1;
3346
3347         res = 0;
3348         for (i = current_value; i != value; i += inc) {
3349                 if ((brightness_mode & 2) &&
3350                     issue_thinkpad_cmos_command(cmos_cmd)) {
3351                         res = -EIO;
3352                         goto errout;
3353                 }
3354                 if ((brightness_mode & 1) &&
3355                     !acpi_ec_write(brightness_offset, i + inc)) {
3356                         res = -EIO;
3357                         goto errout;;
3358                 }
3359         }
3360
3361 errout:
3362         mutex_unlock(&brightness_mutex);
3363         return res;
3364 }
3365
3366 static int brightness_read(char *p)
3367 {
3368         int len = 0;
3369         int level;
3370
3371         if ((level = brightness_get(NULL)) < 0) {
3372                 len += sprintf(p + len, "level:\t\tunreadable\n");
3373         } else {
3374                 len += sprintf(p + len, "level:\t\t%d\n", level);
3375                 len += sprintf(p + len, "commands:\tup, down\n");
3376                 len += sprintf(p + len, "commands:\tlevel <level>"
3377                                " (<level> is 0-%d)\n",
3378                                (tp_features.bright_16levels) ? 15 : 7);
3379         }
3380
3381         return len;
3382 }
3383
3384 static int brightness_write(char *buf)
3385 {
3386         int level;
3387         int rc;
3388         char *cmd;
3389         int max_level = (tp_features.bright_16levels) ? 15 : 7;
3390
3391         level = brightness_get(NULL);
3392         if (level < 0)
3393                 return level;
3394
3395         while ((cmd = next_cmd(&buf))) {
3396                 if (strlencmp(cmd, "up") == 0) {
3397                         if (level < max_level)
3398                                 level++;
3399                 } else if (strlencmp(cmd, "down") == 0) {
3400                         if (level > 0)
3401                                 level--;
3402                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
3403                            level >= 0 && level <= max_level) {
3404                         /* new level set */
3405                 } else
3406                         return -EINVAL;
3407         }
3408
3409         /*
3410          * Now we know what the final level should be, so we try to set it.
3411          * Doing it this way makes the syscall restartable in case of EINTR
3412          */
3413         rc = brightness_set(level);
3414         return (rc == -EINTR)? ERESTARTSYS : rc;
3415 }
3416
3417 static struct ibm_struct brightness_driver_data = {
3418         .name = "brightness",
3419         .read = brightness_read,
3420         .write = brightness_write,
3421         .exit = brightness_exit,
3422 };
3423
3424 /*************************************************************************
3425  * Volume subdriver
3426  */
3427
3428 static int volume_read(char *p)
3429 {
3430         int len = 0;
3431         u8 level;
3432
3433         if (!acpi_ec_read(volume_offset, &level)) {
3434                 len += sprintf(p + len, "level:\t\tunreadable\n");
3435         } else {
3436                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3437                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3438                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3439                 len += sprintf(p + len, "commands:\tlevel <level>"
3440                                " (<level> is 0-15)\n");
3441         }
3442
3443         return len;
3444 }
3445
3446 static int volume_write(char *buf)
3447 {
3448         int cmos_cmd, inc, i;
3449         u8 level, mute;
3450         int new_level, new_mute;
3451         char *cmd;
3452
3453         while ((cmd = next_cmd(&buf))) {
3454                 if (!acpi_ec_read(volume_offset, &level))
3455                         return -EIO;
3456                 new_mute = mute = level & 0x40;
3457                 new_level = level = level & 0xf;
3458
3459                 if (strlencmp(cmd, "up") == 0) {
3460                         if (mute)
3461                                 new_mute = 0;
3462                         else
3463                                 new_level = level == 15 ? 15 : level + 1;
3464                 } else if (strlencmp(cmd, "down") == 0) {
3465                         if (mute)
3466                                 new_mute = 0;
3467                         else
3468                                 new_level = level == 0 ? 0 : level - 1;
3469                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3470                            new_level >= 0 && new_level <= 15) {
3471                         /* new_level set */
3472                 } else if (strlencmp(cmd, "mute") == 0) {
3473                         new_mute = 0x40;
3474                 } else
3475                         return -EINVAL;
3476
3477                 if (new_level != level) {       /* mute doesn't change */
3478                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3479                         inc = new_level > level ? 1 : -1;
3480
3481                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3482                                      !acpi_ec_write(volume_offset, level)))
3483                                 return -EIO;
3484
3485                         for (i = level; i != new_level; i += inc)
3486                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3487                                     !acpi_ec_write(volume_offset, i + inc))
3488                                         return -EIO;
3489
3490                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3491                                      !acpi_ec_write(volume_offset,
3492                                                     new_level + mute)))
3493                                 return -EIO;
3494                 }
3495
3496                 if (new_mute != mute) { /* level doesn't change */
3497                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3498
3499                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3500                             !acpi_ec_write(volume_offset, level + new_mute))
3501                                 return -EIO;
3502                 }
3503         }
3504
3505         return 0;
3506 }
3507
3508 static struct ibm_struct volume_driver_data = {
3509         .name = "volume",
3510         .read = volume_read,
3511         .write = volume_write,
3512 };
3513
3514 /*************************************************************************
3515  * Fan subdriver
3516  */
3517
3518 /*
3519  * FAN ACCESS MODES
3520  *
3521  * TPACPI_FAN_RD_ACPI_GFAN:
3522  *      ACPI GFAN method: returns fan level
3523  *
3524  *      see TPACPI_FAN_WR_ACPI_SFAN
3525  *      EC 0x2f (HFSP) not available if GFAN exists
3526  *
3527  * TPACPI_FAN_WR_ACPI_SFAN:
3528  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3529  *
3530  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3531  *      it for writing.
3532  *
3533  * TPACPI_FAN_WR_TPEC:
3534  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3535  *      Supported on almost all ThinkPads
3536  *
3537  *      Fan speed changes of any sort (including those caused by the
3538  *      disengaged mode) are usually done slowly by the firmware as the
3539  *      maximum ammount of fan duty cycle change per second seems to be
3540  *      limited.
3541  *
3542  *      Reading is not available if GFAN exists.
3543  *      Writing is not available if SFAN exists.
3544  *
3545  *      Bits
3546  *       7      automatic mode engaged;
3547  *              (default operation mode of the ThinkPad)
3548  *              fan level is ignored in this mode.
3549  *       6      full speed mode (takes precedence over bit 7);
3550  *              not available on all thinkpads.  May disable
3551  *              the tachometer while the fan controller ramps up
3552  *              the speed (which can take up to a few *minutes*).
3553  *              Speeds up fan to 100% duty-cycle, which is far above
3554  *              the standard RPM levels.  It is not impossible that
3555  *              it could cause hardware damage.
3556  *      5-3     unused in some models.  Extra bits for fan level
3557  *              in others, but still useless as all values above
3558  *              7 map to the same speed as level 7 in these models.
3559  *      2-0     fan level (0..7 usually)
3560  *                      0x00 = stop
3561  *                      0x07 = max (set when temperatures critical)
3562  *              Some ThinkPads may have other levels, see
3563  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3564  *
3565  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3566  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3567  *      does so, its initial value is meaningless (0x07).
3568  *
3569  *      For firmware bugs, refer to:
3570  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3571  *
3572  *      ----
3573  *
3574  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3575  *      Main fan tachometer reading (in RPM)
3576  *
3577  *      This register is present on all ThinkPads with a new-style EC, and
3578  *      it is known not to be present on the A21m/e, and T22, as there is
3579  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3580  *      ThinkPads from this same time period (and earlier) probably lack the
3581  *      tachometer as well.
3582  *
3583  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3584  *      was never fixed by IBM to report the EC firmware version string
3585  *      probably support the tachometer (like the early X models), so
3586  *      detecting it is quite hard.  We need more data to know for sure.
3587  *
3588  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3589  *      might result.
3590  *
3591  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3592  *      mode.
3593  *
3594  *      For firmware bugs, refer to:
3595  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3596  *
3597  * TPACPI_FAN_WR_ACPI_FANS:
3598  *      ThinkPad X31, X40, X41.  Not available in the X60.
3599  *
3600  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3601  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3602  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3603  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3604  *
3605  *      The speeds are stored on handles
3606  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3607  *
3608  *      There are three default speed sets, acessible as handles:
3609  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3610  *
3611  *      ACPI DSDT switches which set is in use depending on various
3612  *      factors.
3613  *
3614  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3615  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3616  *      but the ACPI tables just mention level 7.
3617  */
3618
3619 static enum fan_status_access_mode fan_status_access_mode;
3620 static enum fan_control_access_mode fan_control_access_mode;
3621 static enum fan_control_commands fan_control_commands;
3622
3623 static u8 fan_control_initial_status;
3624 static u8 fan_control_desired_level;
3625
3626 static void fan_watchdog_fire(struct work_struct *ignored);
3627 static int fan_watchdog_maxinterval;
3628 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3629
3630 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3631 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3632            "\\FSPD",            /* 600e/x, 770e, 770x */
3633            );                   /* all others */
3634 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3635            "JFNS",              /* 770x-JL */
3636            );                   /* all others */
3637
3638 /*
3639  * SYSFS fan layout: hwmon compatible (device)
3640  *
3641  * pwm*_enable:
3642  *      0: "disengaged" mode
3643  *      1: manual mode
3644  *      2: native EC "auto" mode (recommended, hardware default)
3645  *
3646  * pwm*: set speed in manual mode, ignored otherwise.
3647  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3648  *      interpolation.
3649  *
3650  * fan*_input: tachometer reading, RPM
3651  *
3652  *
3653  * SYSFS fan layout: extensions
3654  *
3655  * fan_watchdog (driver):
3656  *      fan watchdog interval in seconds, 0 disables (default), max 120
3657  */
3658
3659 /* sysfs fan pwm1_enable ----------------------------------------------- */
3660 static ssize_t fan_pwm1_enable_show(struct device *dev,
3661                                     struct device_attribute *attr,
3662                                     char *buf)
3663 {
3664         int res, mode;
3665         u8 status;
3666
3667         res = fan_get_status_safe(&status);
3668         if (res)
3669                 return res;
3670
3671         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3672                 if (status != fan_control_initial_status) {
3673                         tp_features.fan_ctrl_status_undef = 0;
3674                 } else {
3675                         /* Return most likely status. In fact, it
3676                          * might be the only possible status */
3677                         status = TP_EC_FAN_AUTO;
3678                 }
3679         }
3680
3681         if (status & TP_EC_FAN_FULLSPEED) {
3682                 mode = 0;
3683         } else if (status & TP_EC_FAN_AUTO) {
3684                 mode = 2;
3685         } else
3686                 mode = 1;
3687
3688         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3689 }
3690
3691 static ssize_t fan_pwm1_enable_store(struct device *dev,
3692                                      struct device_attribute *attr,
3693                                      const char *buf, size_t count)
3694 {
3695         unsigned long t;
3696         int res, level;
3697
3698         if (parse_strtoul(buf, 2, &t))
3699                 return -EINVAL;
3700
3701         switch (t) {
3702         case 0:
3703                 level = TP_EC_FAN_FULLSPEED;
3704                 break;
3705         case 1:
3706                 level = TPACPI_FAN_LAST_LEVEL;
3707                 break;
3708         case 2:
3709                 level = TP_EC_FAN_AUTO;
3710                 break;
3711         case 3:
3712                 /* reserved for software-controlled auto mode */
3713                 return -ENOSYS;
3714         default:
3715                 return -EINVAL;
3716         }
3717
3718         res = fan_set_level_safe(level);
3719         if (res == -ENXIO)
3720                 return -EINVAL;
3721         else if (res < 0)
3722                 return res;
3723
3724         fan_watchdog_reset();
3725
3726         return count;
3727 }
3728
3729 static struct device_attribute dev_attr_fan_pwm1_enable =
3730         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3731                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3732
3733 /* sysfs fan pwm1 ------------------------------------------------------ */
3734 static ssize_t fan_pwm1_show(struct device *dev,
3735                              struct device_attribute *attr,
3736                              char *buf)
3737 {
3738         int res;
3739         u8 status;
3740
3741         res = fan_get_status_safe(&status);
3742         if (res)
3743                 return res;
3744
3745         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3746                 if (status != fan_control_initial_status) {
3747                         tp_features.fan_ctrl_status_undef = 0;
3748                 } else {
3749                         status = TP_EC_FAN_AUTO;
3750                 }
3751         }
3752
3753         if ((status &
3754              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3755                 status = fan_control_desired_level;
3756
3757         if (status > 7)
3758                 status = 7;
3759
3760         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3761 }
3762
3763 static ssize_t fan_pwm1_store(struct device *dev,
3764                               struct device_attribute *attr,
3765                               const char *buf, size_t count)
3766 {
3767         unsigned long s;
3768         int rc;
3769         u8 status, newlevel;
3770
3771         if (parse_strtoul(buf, 255, &s))
3772                 return -EINVAL;
3773
3774         /* scale down from 0-255 to 0-7 */
3775         newlevel = (s >> 5) & 0x07;
3776
3777         if (mutex_lock_interruptible(&fan_mutex))
3778                 return -ERESTARTSYS;
3779
3780         rc = fan_get_status(&status);
3781         if (!rc && (status &
3782                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3783                 rc = fan_set_level(newlevel);
3784                 if (rc == -ENXIO)
3785                         rc = -EINVAL;
3786                 else if (!rc) {
3787                         fan_update_desired_level(newlevel);
3788                         fan_watchdog_reset();
3789                 }
3790         }
3791
3792         mutex_unlock(&fan_mutex);
3793         return (rc)? rc : count;
3794 }
3795
3796 static struct device_attribute dev_attr_fan_pwm1 =
3797         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3798                 fan_pwm1_show, fan_pwm1_store);
3799
3800 /* sysfs fan fan1_input ------------------------------------------------ */
3801 static ssize_t fan_fan1_input_show(struct device *dev,
3802                            struct device_attribute *attr,
3803                            char *buf)
3804 {
3805         int res;
3806         unsigned int speed;
3807
3808         res = fan_get_speed(&speed);
3809         if (res < 0)
3810                 return res;
3811
3812         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3813 }
3814
3815 static struct device_attribute dev_attr_fan_fan1_input =
3816         __ATTR(fan1_input, S_IRUGO,
3817                 fan_fan1_input_show, NULL);
3818
3819 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
3820 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3821                                      char *buf)
3822 {
3823         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3824 }
3825
3826 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3827                                       const char *buf, size_t count)
3828 {
3829         unsigned long t;
3830
3831         if (parse_strtoul(buf, 120, &t))
3832                 return -EINVAL;
3833
3834         if (!fan_control_allowed)
3835                 return -EPERM;
3836
3837         fan_watchdog_maxinterval = t;
3838         fan_watchdog_reset();
3839
3840         return count;
3841 }
3842
3843 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3844                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3845
3846 /* --------------------------------------------------------------------- */
3847 static struct attribute *fan_attributes[] = {
3848         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3849         &dev_attr_fan_fan1_input.attr,
3850         NULL
3851 };
3852
3853 static const struct attribute_group fan_attr_group = {
3854         .attrs = fan_attributes,
3855 };
3856
3857 static int __init fan_init(struct ibm_init_struct *iibm)
3858 {
3859         int rc;
3860
3861         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3862
3863         mutex_init(&fan_mutex);
3864         fan_status_access_mode = TPACPI_FAN_NONE;
3865         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3866         fan_control_commands = 0;
3867         fan_watchdog_maxinterval = 0;
3868         tp_features.fan_ctrl_status_undef = 0;
3869         fan_control_desired_level = 7;
3870
3871         IBM_ACPIHANDLE_INIT(fans);
3872         IBM_ACPIHANDLE_INIT(gfan);
3873         IBM_ACPIHANDLE_INIT(sfan);
3874
3875         if (gfan_handle) {
3876                 /* 570, 600e/x, 770e, 770x */
3877                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3878         } else {
3879                 /* all other ThinkPads: note that even old-style
3880                  * ThinkPad ECs supports the fan control register */
3881                 if (likely(acpi_ec_read(fan_status_offset,
3882                                         &fan_control_initial_status))) {
3883                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3884
3885                         /* In some ThinkPads, neither the EC nor the ACPI
3886                          * DSDT initialize the fan status, and it ends up
3887                          * being set to 0x07 when it *could* be either
3888                          * 0x07 or 0x80.
3889                          *
3890                          * Enable for TP-1Y (T43), TP-78 (R51e),
3891                          * TP-76 (R52), TP-70 (T43, R52), which are known
3892                          * to be buggy. */
3893                         if (fan_control_initial_status == 0x07) {
3894                                 switch (thinkpad_id.ec_model) {
3895                                 case 0x5931: /* TP-1Y */
3896                                 case 0x3837: /* TP-78 */
3897                                 case 0x3637: /* TP-76 */
3898                                 case 0x3037: /* TP-70 */
3899                                         printk(IBM_NOTICE
3900                                                "fan_init: initial fan status is "
3901                                                "unknown, assuming it is in auto "
3902                                                "mode\n");
3903                                         tp_features.fan_ctrl_status_undef = 1;
3904                                         ;;
3905                                 }
3906                         }
3907                 } else {
3908                         printk(IBM_ERR
3909                                "ThinkPad ACPI EC access misbehaving, "
3910                                "fan status and control unavailable\n");
3911                         return 1;
3912                 }
3913         }
3914
3915         if (sfan_handle) {
3916                 /* 570, 770x-JL */
3917                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3918                 fan_control_commands |=
3919                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3920         } else {
3921                 if (!gfan_handle) {
3922                         /* gfan without sfan means no fan control */
3923                         /* all other models implement TP EC 0x2f control */
3924
3925                         if (fans_handle) {
3926                                 /* X31, X40, X41 */
3927                                 fan_control_access_mode =
3928                                     TPACPI_FAN_WR_ACPI_FANS;
3929                                 fan_control_commands |=
3930                                     TPACPI_FAN_CMD_SPEED |
3931                                     TPACPI_FAN_CMD_LEVEL |
3932                                     TPACPI_FAN_CMD_ENABLE;
3933                         } else {
3934                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3935                                 fan_control_commands |=
3936                                     TPACPI_FAN_CMD_LEVEL |
3937                                     TPACPI_FAN_CMD_ENABLE;
3938                         }
3939                 }
3940         }
3941
3942         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3943                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3944                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3945                 fan_status_access_mode, fan_control_access_mode);
3946
3947         /* fan control master switch */
3948         if (!fan_control_allowed) {
3949                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3950                 fan_control_commands = 0;
3951                 dbg_printk(TPACPI_DBG_INIT,
3952                            "fan control features disabled by parameter\n");
3953         }
3954
3955         /* update fan_control_desired_level */
3956         if (fan_status_access_mode != TPACPI_FAN_NONE)
3957                 fan_get_status_safe(NULL);
3958
3959         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3960             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3961                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3962                                          &fan_attr_group);
3963                 if (!(rc < 0))
3964                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
3965                                         &driver_attr_fan_watchdog);
3966                 if (rc < 0)
3967                         return rc;
3968                 return 0;
3969         } else
3970                 return 1;
3971 }
3972
3973 /*
3974  * Call with fan_mutex held
3975  */
3976 static void fan_update_desired_level(u8 status)
3977 {
3978         if ((status &
3979              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3980                 if (status > 7)
3981                         fan_control_desired_level = 7;
3982                 else
3983                         fan_control_desired_level = status;
3984         }
3985 }
3986
3987 static int fan_get_status(u8 *status)
3988 {
3989         u8 s;
3990
3991         /* TODO:
3992          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3993
3994         switch (fan_status_access_mode) {
3995         case TPACPI_FAN_RD_ACPI_GFAN:
3996                 /* 570, 600e/x, 770e, 770x */
3997
3998                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3999                         return -EIO;
4000
4001                 if (likely(status))
4002                         *status = s & 0x07;
4003
4004                 break;
4005
4006         case TPACPI_FAN_RD_TPEC:
4007                 /* all except 570, 600e/x, 770e, 770x */
4008                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4009                         return -EIO;
4010
4011                 if (likely(status))
4012                         *status = s;
4013
4014                 break;
4015
4016         default:
4017                 return -ENXIO;
4018         }
4019
4020         return 0;
4021 }
4022
4023 static int fan_get_status_safe(u8 *status)
4024 {
4025         int rc;
4026         u8 s;
4027
4028         if (mutex_lock_interruptible(&fan_mutex))
4029                 return -ERESTARTSYS;
4030         rc = fan_get_status(&s);
4031         if (!rc)
4032                 fan_update_desired_level(s);
4033         mutex_unlock(&fan_mutex);
4034
4035         if (status)
4036                 *status = s;
4037
4038         return rc;
4039 }
4040
4041 static void fan_exit(void)
4042 {
4043         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
4044
4045         /* FIXME: can we really do this unconditionally? */
4046         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
4047         driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);
4048
4049         cancel_delayed_work(&fan_watchdog_task);
4050         flush_scheduled_work();
4051 }
4052
4053 static int fan_get_speed(unsigned int *speed)
4054 {
4055         u8 hi, lo;
4056
4057         switch (fan_status_access_mode) {
4058         case TPACPI_FAN_RD_TPEC:
4059                 /* all except 570, 600e/x, 770e, 770x */
4060                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4061                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4062                         return -EIO;
4063
4064                 if (likely(speed))
4065                         *speed = (hi << 8) | lo;
4066
4067                 break;
4068
4069         default:
4070                 return -ENXIO;
4071         }
4072
4073         return 0;
4074 }
4075
4076 static void fan_watchdog_fire(struct work_struct *ignored)
4077 {
4078         int rc;
4079
4080         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4081                 return;
4082
4083         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
4084         rc = fan_set_enable();
4085         if (rc < 0) {
4086                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
4087                         "will try again later...\n", -rc);
4088                 /* reschedule for later */
4089                 fan_watchdog_reset();
4090         }
4091 }
4092
4093 static void fan_watchdog_reset(void)
4094 {
4095         static int fan_watchdog_active;
4096
4097         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4098                 return;
4099
4100         if (fan_watchdog_active)
4101                 cancel_delayed_work(&fan_watchdog_task);
4102
4103         if (fan_watchdog_maxinterval > 0 &&
4104             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4105                 fan_watchdog_active = 1;
4106                 if (!schedule_delayed_work(&fan_watchdog_task,
4107                                 msecs_to_jiffies(fan_watchdog_maxinterval
4108                                                  * 1000))) {
4109                         printk(IBM_ERR "failed to schedule the fan watchdog, "
4110                                "watchdog will not trigger\n");
4111                 }
4112         } else
4113                 fan_watchdog_active = 0;
4114 }
4115
4116 static int fan_set_level(int level)
4117 {
4118         if (!fan_control_allowed)
4119                 return -EPERM;
4120
4121         switch (fan_control_access_mode) {
4122         case TPACPI_FAN_WR_ACPI_SFAN:
4123                 if (level >= 0 && level <= 7) {
4124                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4125                                 return -EIO;
4126                 } else
4127                         return -EINVAL;
4128                 break;
4129
4130         case TPACPI_FAN_WR_ACPI_FANS:
4131         case TPACPI_FAN_WR_TPEC:
4132                 if ((level != TP_EC_FAN_AUTO) &&
4133                     (level != TP_EC_FAN_FULLSPEED) &&
4134                     ((level < 0) || (level > 7)))
4135                         return -EINVAL;
4136
4137                 /* safety net should the EC not support AUTO
4138                  * or FULLSPEED mode bits and just ignore them */
4139                 if (level & TP_EC_FAN_FULLSPEED)
4140                         level |= 7;     /* safety min speed 7 */
4141                 else if (level & TP_EC_FAN_FULLSPEED)
4142                         level |= 4;     /* safety min speed 4 */
4143
4144                 if (!acpi_ec_write(fan_status_offset, level))
4145                         return -EIO;
4146                 else
4147                         tp_features.fan_ctrl_status_undef = 0;
4148                 break;
4149
4150         default:
4151                 return -ENXIO;
4152         }
4153         return 0;
4154 }
4155
4156 static int fan_set_level_safe(int level)
4157 {
4158         int rc;
4159
4160         if (!fan_control_allowed)
4161                 return -EPERM;
4162
4163         if (mutex_lock_interruptible(&fan_mutex))
4164                 return -ERESTARTSYS;
4165
4166         if (level == TPACPI_FAN_LAST_LEVEL)
4167                 level = fan_control_desired_level;
4168
4169         rc = fan_set_level(level);
4170         if (!rc)
4171                 fan_update_desired_level(level);
4172
4173         mutex_unlock(&fan_mutex);
4174         return rc;
4175 }
4176
4177 static int fan_set_enable(void)
4178 {
4179         u8 s;
4180         int rc;
4181
4182         if (!fan_control_allowed)
4183                 return -EPERM;
4184
4185         if (mutex_lock_interruptible(&fan_mutex))
4186                 return -ERESTARTSYS;
4187
4188         switch (fan_control_access_mode) {
4189         case TPACPI_FAN_WR_ACPI_FANS:
4190         case TPACPI_FAN_WR_TPEC:
4191                 rc = fan_get_status(&s);
4192                 if (rc < 0)
4193                         break;
4194
4195                 /* Don't go out of emergency fan mode */
4196                 if (s != 7) {
4197                         s &= 0x07;
4198                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4199                 }
4200
4201                 if (!acpi_ec_write(fan_status_offset, s))
4202                         rc = -EIO;
4203                 else {
4204                         tp_features.fan_ctrl_status_undef = 0;
4205                         rc = 0;
4206                 }
4207                 break;
4208
4209         case TPACPI_FAN_WR_ACPI_SFAN:
4210                 rc = fan_get_status(&s);
4211                 if (rc < 0)
4212                         break;
4213
4214                 s &= 0x07;
4215
4216                 /* Set fan to at least level 4 */
4217                 s |= 4;
4218
4219                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4220                         rc= -EIO;
4221                 else
4222                         rc = 0;
4223                 break;
4224
4225         default:
4226                 rc = -ENXIO;
4227         }
4228
4229         mutex_unlock(&fan_mutex);
4230         return rc;
4231 }
4232
4233 static int fan_set_disable(void)
4234 {
4235         int rc;
4236
4237         if (!fan_control_allowed)
4238                 return -EPERM;
4239
4240         if (mutex_lock_interruptible(&fan_mutex))
4241                 return -ERESTARTSYS;
4242
4243         rc = 0;
4244         switch (fan_control_access_mode) {
4245         case TPACPI_FAN_WR_ACPI_FANS:
4246         case TPACPI_FAN_WR_TPEC:
4247                 if (!acpi_ec_write(fan_status_offset, 0x00))
4248                         rc = -EIO;
4249                 else {
4250                         fan_control_desired_level = 0;
4251                         tp_features.fan_ctrl_status_undef = 0;
4252                 }
4253                 break;
4254
4255         case TPACPI_FAN_WR_ACPI_SFAN:
4256                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4257                         rc = -EIO;
4258                 else
4259                         fan_control_desired_level = 0;
4260                 break;
4261
4262         default:
4263                 rc = -ENXIO;
4264         }
4265
4266
4267         mutex_unlock(&fan_mutex);
4268         return rc;
4269 }
4270
4271 static int fan_set_speed(int speed)
4272 {
4273         int rc;
4274
4275         if (!fan_control_allowed)
4276                 return -EPERM;
4277
4278         if (mutex_lock_interruptible(&fan_mutex))
4279                 return -ERESTARTSYS;
4280
4281         rc = 0;
4282         switch (fan_control_access_mode) {
4283         case TPACPI_FAN_WR_ACPI_FANS:
4284                 if (speed >= 0 && speed <= 65535) {
4285                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4286                                         speed, speed, speed))
4287                                 rc = -EIO;
4288                 } else
4289                         rc = -EINVAL;
4290                 break;
4291
4292         default:
4293                 rc = -ENXIO;
4294         }
4295
4296         mutex_unlock(&fan_mutex);
4297         return rc;
4298 }
4299
4300 static int fan_read(char *p)
4301 {
4302         int len = 0;
4303         int rc;
4304         u8 status;
4305         unsigned int speed = 0;
4306
4307         switch (fan_status_access_mode) {
4308         case TPACPI_FAN_RD_ACPI_GFAN:
4309                 /* 570, 600e/x, 770e, 770x */
4310                 if ((rc = fan_get_status_safe(&status)) < 0)
4311                         return rc;
4312
4313                 len += sprintf(p + len, "status:\t\t%s\n"
4314                                "level:\t\t%d\n",
4315                                (status != 0) ? "enabled" : "disabled", status);
4316                 break;
4317
4318         case TPACPI_FAN_RD_TPEC:
4319                 /* all except 570, 600e/x, 770e, 770x */
4320                 if ((rc = fan_get_status_safe(&status)) < 0)
4321                         return rc;
4322
4323                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4324                         if (status != fan_control_initial_status)
4325                                 tp_features.fan_ctrl_status_undef = 0;
4326                         else
4327                                 /* Return most likely status. In fact, it
4328                                  * might be the only possible status */
4329                                 status = TP_EC_FAN_AUTO;
4330                 }
4331
4332                 len += sprintf(p + len, "status:\t\t%s\n",
4333                                (status != 0) ? "enabled" : "disabled");
4334
4335                 if ((rc = fan_get_speed(&speed)) < 0)
4336                         return rc;
4337
4338                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4339
4340                 if (status & TP_EC_FAN_FULLSPEED)
4341                         /* Disengaged mode takes precedence */
4342                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4343                 else if (status & TP_EC_FAN_AUTO)
4344                         len += sprintf(p + len, "level:\t\tauto\n");
4345                 else
4346                         len += sprintf(p + len, "level:\t\t%d\n", status);
4347                 break;
4348
4349         case TPACPI_FAN_NONE:
4350         default:
4351                 len += sprintf(p + len, "status:\t\tnot supported\n");
4352         }
4353
4354         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4355                 len += sprintf(p + len, "commands:\tlevel <level>");
4356
4357                 switch (fan_control_access_mode) {
4358                 case TPACPI_FAN_WR_ACPI_SFAN:
4359                         len += sprintf(p + len, " (<level> is 0-7)\n");
4360                         break;
4361
4362                 default:
4363                         len += sprintf(p + len, " (<level> is 0-7, "
4364                                        "auto, disengaged, full-speed)\n");
4365                         break;
4366                 }
4367         }
4368
4369         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4370                 len += sprintf(p + len, "commands:\tenable, disable\n"
4371                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4372                                "1-120 (seconds))\n");
4373
4374         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4375                 len += sprintf(p + len, "commands:\tspeed <speed>"
4376                                " (<speed> is 0-65535)\n");
4377
4378         return len;
4379 }
4380
4381 static int fan_write_cmd_level(const char *cmd, int *rc)
4382 {
4383         int level;
4384
4385         if (strlencmp(cmd, "level auto") == 0)
4386                 level = TP_EC_FAN_AUTO;
4387         else if ((strlencmp(cmd, "level disengaged") == 0) |
4388                  (strlencmp(cmd, "level full-speed") == 0))
4389                 level = TP_EC_FAN_FULLSPEED;
4390         else if (sscanf(cmd, "level %d", &level) != 1)
4391                 return 0;
4392
4393         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4394                 printk(IBM_ERR "level command accepted for unsupported "
4395                        "access mode %d", fan_control_access_mode);
4396
4397         return 1;
4398 }
4399
4400 static int fan_write_cmd_enable(const char *cmd, int *rc)
4401 {
4402         if (strlencmp(cmd, "enable") != 0)
4403                 return 0;
4404
4405         if ((*rc = fan_set_enable()) == -ENXIO)
4406                 printk(IBM_ERR "enable command accepted for unsupported "
4407                        "access mode %d", fan_control_access_mode);
4408
4409         return 1;
4410 }
4411
4412 static int fan_write_cmd_disable(const char *cmd, int *rc)
4413 {
4414         if (strlencmp(cmd, "disable") != 0)
4415                 return 0;
4416
4417         if ((*rc = fan_set_disable()) == -ENXIO)
4418                 printk(IBM_ERR "disable command accepted for unsupported "
4419                        "access mode %d", fan_control_access_mode);
4420
4421         return 1;
4422 }
4423
4424 static int fan_write_cmd_speed(const char *cmd, int *rc)
4425 {
4426         int speed;
4427
4428         /* TODO:
4429          * Support speed <low> <medium> <high> ? */
4430
4431         if (sscanf(cmd, "speed %d", &speed) != 1)
4432                 return 0;
4433
4434         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4435                 printk(IBM_ERR "speed command accepted for unsupported "
4436                        "access mode %d", fan_control_access_mode);
4437
4438         return 1;
4439 }
4440
4441 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4442 {
4443         int interval;
4444
4445         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4446                 return 0;
4447
4448         if (interval < 0 || interval > 120)
4449                 *rc = -EINVAL;
4450         else
4451                 fan_watchdog_maxinterval = interval;
4452
4453         return 1;
4454 }
4455
4456 static int fan_write(char *buf)
4457 {
4458         char *cmd;
4459         int rc = 0;
4460
4461         while (!rc && (cmd = next_cmd(&buf))) {
4462                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4463                       fan_write_cmd_level(cmd, &rc)) &&
4464                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4465                       (fan_write_cmd_enable(cmd, &rc) ||
4466                        fan_write_cmd_disable(cmd, &rc) ||
4467                        fan_write_cmd_watchdog(cmd, &rc))) &&
4468                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4469                       fan_write_cmd_speed(cmd, &rc))
4470                     )
4471                         rc = -EINVAL;
4472                 else if (!rc)
4473                         fan_watchdog_reset();
4474         }
4475
4476         return rc;
4477 }
4478
4479 static struct ibm_struct fan_driver_data = {
4480         .name = "fan",
4481         .read = fan_read,
4482         .write = fan_write,
4483         .exit = fan_exit,
4484 };
4485
4486 /****************************************************************************
4487  ****************************************************************************
4488  *
4489  * Infrastructure
4490  *
4491  ****************************************************************************
4492  ****************************************************************************/
4493
4494 /* sysfs name ---------------------------------------------------------- */
4495 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
4496                            struct device_attribute *attr,
4497                            char *buf)
4498 {
4499         return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
4500 }
4501
4502 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
4503         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
4504
4505 /* --------------------------------------------------------------------- */
4506
4507 /* /proc support */
4508 static struct proc_dir_entry *proc_dir;
4509
4510 /* Subdriver registry */
4511 static LIST_HEAD(tpacpi_all_drivers);
4512
4513
4514 /*
4515  * Module and infrastructure proble, init and exit handling
4516  */
4517
4518 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4519 static const char * __init str_supported(int is_supported)
4520 {
4521         static char text_unsupported[] __initdata = "not supported";
4522
4523         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4524 }
4525 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4526
4527 static int __init ibm_init(struct ibm_init_struct *iibm)
4528 {
4529         int ret;
4530         struct ibm_struct *ibm = iibm->data;
4531         struct proc_dir_entry *entry;
4532
4533         BUG_ON(ibm == NULL);
4534
4535         INIT_LIST_HEAD(&ibm->all_drivers);
4536
4537         if (ibm->flags.experimental && !experimental)
4538                 return 0;
4539
4540         dbg_printk(TPACPI_DBG_INIT,
4541                 "probing for %s\n", ibm->name);
4542
4543         if (iibm->init) {
4544                 ret = iibm->init(iibm);
4545                 if (ret > 0)
4546                         return 0;       /* probe failed */
4547                 if (ret)
4548                         return ret;
4549
4550                 ibm->flags.init_called = 1;
4551         }
4552
4553         if (ibm->acpi) {
4554                 if (ibm->acpi->hid) {
4555                         ret = register_tpacpi_subdriver(ibm);
4556                         if (ret)
4557                                 goto err_out;
4558                 }
4559
4560                 if (ibm->acpi->notify) {
4561                         ret = setup_acpi_notify(ibm);
4562                         if (ret == -ENODEV) {
4563                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4564                                         ibm->name);
4565                                 ret = 0;
4566                                 goto err_out;
4567                         }
4568                         if (ret < 0)
4569                                 goto err_out;
4570                 }
4571         }
4572
4573         dbg_printk(TPACPI_DBG_INIT,
4574                 "%s installed\n", ibm->name);
4575
4576         if (ibm->read) {
4577                 entry = create_proc_entry(ibm->name,
4578                                           S_IFREG | S_IRUGO | S_IWUSR,
4579                                           proc_dir);
4580                 if (!entry) {
4581                         printk(IBM_ERR "unable to create proc entry %s\n",
4582                                ibm->name);
4583                         ret = -ENODEV;
4584                         goto err_out;
4585                 }
4586                 entry->owner = THIS_MODULE;
4587                 entry->data = ibm;
4588                 entry->read_proc = &dispatch_procfs_read;
4589                 if (ibm->write)
4590                         entry->write_proc = &dispatch_procfs_write;
4591                 ibm->flags.proc_created = 1;
4592         }
4593
4594         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4595
4596         return 0;
4597
4598 err_out:
4599         dbg_printk(TPACPI_DBG_INIT,
4600                 "%s: at error exit path with result %d\n",
4601                 ibm->name, ret);
4602
4603         ibm_exit(ibm);
4604         return (ret < 0)? ret : 0;
4605 }
4606
4607 static void ibm_exit(struct ibm_struct *ibm)
4608 {
4609         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4610
4611         list_del_init(&ibm->all_drivers);
4612
4613         if (ibm->flags.acpi_notify_installed) {
4614                 dbg_printk(TPACPI_DBG_EXIT,
4615                         "%s: acpi_remove_notify_handler\n", ibm->name);
4616                 BUG_ON(!ibm->acpi);
4617                 acpi_remove_notify_handler(*ibm->acpi->handle,
4618                                            ibm->acpi->type,
4619                                            dispatch_acpi_notify);
4620                 ibm->flags.acpi_notify_installed = 0;
4621                 ibm->flags.acpi_notify_installed = 0;
4622         }
4623
4624         if (ibm->flags.proc_created) {
4625                 dbg_printk(TPACPI_DBG_EXIT,
4626                         "%s: remove_proc_entry\n", ibm->name);
4627                 remove_proc_entry(ibm->name, proc_dir);
4628                 ibm->flags.proc_created = 0;
4629         }
4630
4631         if (ibm->flags.acpi_driver_registered) {
4632                 dbg_printk(TPACPI_DBG_EXIT,
4633                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4634                 BUG_ON(!ibm->acpi);
4635                 acpi_bus_unregister_driver(ibm->acpi->driver);
4636                 kfree(ibm->acpi->driver);
4637                 ibm->acpi->driver = NULL;
4638                 ibm->flags.acpi_driver_registered = 0;
4639         }
4640
4641         if (ibm->flags.init_called && ibm->exit) {
4642                 ibm->exit();
4643                 ibm->flags.init_called = 0;
4644         }
4645
4646         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4647 }
4648
4649 /* Probing */
4650
4651 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4652 {
4653         const struct dmi_device *dev = NULL;
4654         char ec_fw_string[18];
4655
4656         if (!tp)
4657                 return;
4658
4659         memset(tp, 0, sizeof(*tp));
4660
4661         if (dmi_name_in_vendors("IBM"))
4662                 tp->vendor = PCI_VENDOR_ID_IBM;
4663         else if (dmi_name_in_vendors("LENOVO"))
4664                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4665         else
4666                 return;
4667
4668         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4669                                         GFP_KERNEL);
4670         if (!tp->bios_version_str)
4671                 return;
4672         tp->bios_model = tp->bios_version_str[0]
4673                          | (tp->bios_version_str[1] << 8);
4674
4675         /*
4676          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4677          * X32 or newer, all Z series;  Some models must have an
4678          * up-to-date BIOS or they will not be detected.
4679          *
4680          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4681          */
4682         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4683                 if (sscanf(dev->name,
4684                            "IBM ThinkPad Embedded Controller -[%17c",
4685                            ec_fw_string) == 1) {
4686                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4687                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4688
4689                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4690                         tp->ec_model = ec_fw_string[0]
4691                                         | (ec_fw_string[1] << 8);
4692                         break;
4693                 }
4694         }
4695
4696         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4697                                         GFP_KERNEL);
4698         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4699                 kfree(tp->model_str);
4700                 tp->model_str = NULL;
4701         }
4702 }
4703
4704 static int __init probe_for_thinkpad(void)
4705 {
4706         int is_thinkpad;
4707
4708         if (acpi_disabled)
4709                 return -ENODEV;
4710
4711         /*
4712          * Non-ancient models have better DMI tagging, but very old models
4713          * don't.
4714          */
4715         is_thinkpad = (thinkpad_id.model_str != NULL);
4716
4717         /* ec is required because many other handles are relative to it */
4718         IBM_ACPIHANDLE_INIT(ec);
4719         if (!ec_handle) {
4720                 if (is_thinkpad)
4721                         printk(IBM_ERR
4722                                 "Not yet supported ThinkPad detected!\n");
4723                 return -ENODEV;
4724         }
4725
4726         /*
4727          * Risks a regression on very old machines, but reduces potential
4728          * false positives a damn great deal
4729          */
4730         if (!is_thinkpad)
4731                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4732
4733         if (!is_thinkpad && !force_load)
4734                 return -ENODEV;
4735
4736         return 0;
4737 }
4738
4739
4740 /* Module init, exit, parameters */
4741
4742 static struct ibm_init_struct ibms_init[] __initdata = {
4743         {
4744                 .init = thinkpad_acpi_driver_init,
4745                 .data = &thinkpad_acpi_driver_data,
4746         },
4747         {
4748                 .init = hotkey_init,
4749                 .data = &hotkey_driver_data,
4750         },
4751         {
4752                 .init = bluetooth_init,
4753                 .data = &bluetooth_driver_data,
4754         },
4755         {
4756                 .init = wan_init,
4757                 .data = &wan_driver_data,
4758         },
4759         {
4760                 .init = video_init,
4761                 .data = &video_driver_data,
4762         },
4763         {
4764                 .init = light_init,
4765                 .data = &light_driver_data,
4766         },
4767 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4768         {
4769                 .init = dock_init,
4770                 .data = &dock_driver_data[0],
4771         },
4772         {
4773                 .init = dock_init2,
4774                 .data = &dock_driver_data[1],
4775         },
4776 #endif
4777 #ifdef CONFIG_THINKPAD_ACPI_BAY
4778         {
4779                 .init = bay_init,
4780                 .data = &bay_driver_data,
4781         },
4782 #endif
4783         {
4784                 .init = cmos_init,
4785                 .data = &cmos_driver_data,
4786         },
4787         {
4788                 .init = led_init,
4789                 .data = &led_driver_data,
4790         },
4791         {
4792                 .init = beep_init,
4793                 .data = &beep_driver_data,
4794         },
4795         {
4796                 .init = thermal_init,
4797                 .data = &thermal_driver_data,
4798         },
4799         {
4800                 .data = &ecdump_driver_data,
4801         },
4802         {
4803                 .init = brightness_init,
4804                 .data = &brightness_driver_data,
4805         },
4806         {
4807                 .data = &volume_driver_data,
4808         },
4809         {
4810                 .init = fan_init,
4811                 .data = &fan_driver_data,
4812         },
4813 };
4814
4815 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4816 {
4817         unsigned int i;
4818         struct ibm_struct *ibm;
4819
4820         if (!kp || !kp->name || !val)
4821                 return -EINVAL;
4822
4823         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4824                 ibm = ibms_init[i].data;
4825                 WARN_ON(ibm == NULL);
4826
4827                 if (!ibm || !ibm->name)
4828                         continue;
4829
4830                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4831                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4832                                 return -ENOSPC;
4833                         strcpy(ibms_init[i].param, val);
4834                         strcat(ibms_init[i].param, ",");
4835                         return 0;
4836                 }
4837         }
4838
4839         return -EINVAL;
4840 }
4841
4842 static int experimental;
4843 module_param(experimental, int, 0);
4844
4845 static u32 dbg_level;
4846 module_param_named(debug, dbg_level, uint, 0);
4847
4848 static int force_load;
4849 module_param(force_load, bool, 0);
4850
4851 static int fan_control_allowed;
4852 module_param_named(fan_control, fan_control_allowed, bool, 0);
4853
4854 static int brightness_mode;
4855 module_param_named(brightness_mode, brightness_mode, int, 0);
4856
4857 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4858 module_param(brightness_enable, uint, 0);
4859
4860 static unsigned int hotkey_report_mode;
4861 module_param(hotkey_report_mode, uint, 0);
4862
4863 #define IBM_PARAM(feature) \
4864         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4865
4866 IBM_PARAM(hotkey);
4867 IBM_PARAM(bluetooth);
4868 IBM_PARAM(video);
4869 IBM_PARAM(light);
4870 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4871 IBM_PARAM(dock);
4872 #endif
4873 #ifdef CONFIG_THINKPAD_ACPI_BAY
4874 IBM_PARAM(bay);
4875 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4876 IBM_PARAM(cmos);
4877 IBM_PARAM(led);
4878 IBM_PARAM(beep);
4879 IBM_PARAM(ecdump);
4880 IBM_PARAM(brightness);
4881 IBM_PARAM(volume);
4882 IBM_PARAM(fan);
4883
4884 static int __init thinkpad_acpi_module_init(void)
4885 {
4886         int ret, i;
4887
4888         tpacpi_lifecycle = TPACPI_LIFE_INIT;
4889
4890         /* Parameter checking */
4891         if (hotkey_report_mode > 2)
4892                 return -EINVAL;
4893
4894         /* Driver-level probe */
4895
4896         get_thinkpad_model_data(&thinkpad_id);
4897         ret = probe_for_thinkpad();
4898         if (ret) {
4899                 thinkpad_acpi_module_exit();
4900                 return ret;
4901         }
4902
4903         /* Driver initialization */
4904
4905         IBM_ACPIHANDLE_INIT(ecrd);
4906         IBM_ACPIHANDLE_INIT(ecwr);
4907
4908         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4909         if (!proc_dir) {
4910                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4911                 thinkpad_acpi_module_exit();
4912                 return -ENODEV;
4913         }
4914         proc_dir->owner = THIS_MODULE;
4915
4916         ret = platform_driver_register(&tpacpi_pdriver);
4917         if (ret) {
4918                 printk(IBM_ERR "unable to register main platform driver\n");
4919                 thinkpad_acpi_module_exit();
4920                 return ret;
4921         }
4922         tp_features.platform_drv_registered = 1;
4923
4924         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
4925         if (ret) {
4926                 printk(IBM_ERR "unable to register hwmon platform driver\n");
4927                 thinkpad_acpi_module_exit();
4928                 return ret;
4929         }
4930         tp_features.sensors_pdrv_registered = 1;
4931
4932         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4933         if (!ret) {
4934                 tp_features.platform_drv_attrs_registered = 1;
4935                 ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
4936         }
4937         if (ret) {
4938                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4939                 thinkpad_acpi_module_exit();
4940                 return ret;
4941         }
4942         tp_features.sensors_pdrv_attrs_registered = 1;
4943
4944
4945         /* Device initialization */
4946         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4947                                                         NULL, 0);
4948         if (IS_ERR(tpacpi_pdev)) {
4949                 ret = PTR_ERR(tpacpi_pdev);
4950                 tpacpi_pdev = NULL;
4951                 printk(IBM_ERR "unable to register platform device\n");
4952                 thinkpad_acpi_module_exit();
4953                 return ret;
4954         }
4955         tpacpi_sensors_pdev = platform_device_register_simple(
4956                                                         IBM_HWMON_DRVR_NAME,
4957                                                         -1, NULL, 0);
4958         if (IS_ERR(tpacpi_sensors_pdev)) {
4959                 ret = PTR_ERR(tpacpi_sensors_pdev);
4960                 tpacpi_sensors_pdev = NULL;
4961                 printk(IBM_ERR "unable to register hwmon platform device\n");
4962                 thinkpad_acpi_module_exit();
4963                 return ret;
4964         }
4965         ret = device_create_file(&tpacpi_sensors_pdev->dev,
4966                                  &dev_attr_thinkpad_acpi_pdev_name);
4967         if (ret) {
4968                 printk(IBM_ERR
4969                         "unable to create sysfs hwmon device attributes\n");
4970                 thinkpad_acpi_module_exit();
4971                 return ret;
4972         }
4973         tp_features.sensors_pdev_attrs_registered = 1;
4974         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
4975         if (IS_ERR(tpacpi_hwmon)) {
4976                 ret = PTR_ERR(tpacpi_hwmon);
4977                 tpacpi_hwmon = NULL;
4978                 printk(IBM_ERR "unable to register hwmon device\n");
4979                 thinkpad_acpi_module_exit();
4980                 return ret;
4981         }
4982         mutex_init(&tpacpi_inputdev_send_mutex);
4983         tpacpi_inputdev = input_allocate_device();
4984         if (!tpacpi_inputdev) {
4985                 printk(IBM_ERR "unable to allocate input device\n");
4986                 thinkpad_acpi_module_exit();
4987                 return -ENOMEM;
4988         } else {
4989                 /* Prepare input device, but don't register */
4990                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4991                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4992                 tpacpi_inputdev->id.bustype = BUS_HOST;
4993                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4994                                                 thinkpad_id.vendor :
4995                                                 PCI_VENDOR_ID_IBM;
4996                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4997                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4998         }
4999         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5000                 ret = ibm_init(&ibms_init[i]);
5001                 if (ret >= 0 && *ibms_init[i].param)
5002                         ret = ibms_init[i].data->write(ibms_init[i].param);
5003                 if (ret < 0) {
5004                         thinkpad_acpi_module_exit();
5005                         return ret;
5006                 }
5007         }
5008         ret = input_register_device(tpacpi_inputdev);
5009         if (ret < 0) {
5010                 printk(IBM_ERR "unable to register input device\n");
5011                 thinkpad_acpi_module_exit();
5012                 return ret;
5013         } else {
5014                 tp_features.input_device_registered = 1;
5015         }
5016
5017         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
5018         return 0;
5019 }
5020
5021 static void thinkpad_acpi_module_exit(void)
5022 {
5023         struct ibm_struct *ibm, *itmp;
5024
5025         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5026
5027         list_for_each_entry_safe_reverse(ibm, itmp,
5028                                          &tpacpi_all_drivers,
5029                                          all_drivers) {
5030                 ibm_exit(ibm);
5031         }
5032
5033         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5034
5035         if (tpacpi_inputdev) {
5036                 if (tp_features.input_device_registered)
5037                         input_unregister_device(tpacpi_inputdev);
5038                 else
5039                         input_free_device(tpacpi_inputdev);
5040         }
5041
5042         if (tpacpi_hwmon)
5043                 hwmon_device_unregister(tpacpi_hwmon);
5044
5045         if (tp_features.sensors_pdev_attrs_registered)
5046                 device_remove_file(&tpacpi_sensors_pdev->dev,
5047                                    &dev_attr_thinkpad_acpi_pdev_name);
5048         if (tpacpi_sensors_pdev)
5049                 platform_device_unregister(tpacpi_sensors_pdev);
5050         if (tpacpi_pdev)
5051                 platform_device_unregister(tpacpi_pdev);
5052
5053         if (tp_features.sensors_pdrv_attrs_registered)
5054                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5055         if (tp_features.platform_drv_attrs_registered)
5056                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5057
5058         if (tp_features.sensors_pdrv_registered)
5059                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5060
5061         if (tp_features.platform_drv_registered)
5062                 platform_driver_unregister(&tpacpi_pdriver);
5063
5064         if (proc_dir)
5065                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
5066
5067         kfree(thinkpad_id.bios_version_str);
5068         kfree(thinkpad_id.ec_version_str);
5069         kfree(thinkpad_id.model_str);
5070 }
5071
5072 module_init(thinkpad_acpi_module_init);
5073 module_exit(thinkpad_acpi_module_exit);