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 "0.16"
  25 #define TPACPI_SYSFS_VERSION 0x010000
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 #include "thinkpad_acpi.h"
  86
  87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  88 MODULE_DESCRIPTION(IBM_DESC);
  89 MODULE_VERSION(IBM_VERSION);
  90 MODULE_LICENSE("GPL");
  91
  92 /* Please remove this in year 2009 */
  93 MODULE_ALIAS("ibm_acpi");
  94
  95 /*
  96  * DMI matching for module autoloading
  97  *
  98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
  99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 100  *
 101  * Only models listed in thinkwiki will be supported, so add yours
 102  * if it is not there yet.
 103  */
 104 #define IBM_BIOS_MODULE_ALIAS(__type) \
 105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 106
 107 /* Non-ancient thinkpads */
 108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 110
 111 /* Ancient thinkpad BIOSes have to be identified by
 112  * BIOS type or model number, and there are far less
 113  * BIOS types than model numbers... */
 114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 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 class_device *tpacpi_hwmon;
 530 static struct input_dev *tpacpi_inputdev;
 531 static struct mutex tpacpi_inputdev_send_mutex;
 532
 533
 534 static int tpacpi_resume_handler(struct platform_device *pdev)
 535 {
 536         struct ibm_struct *ibm, *itmp;
 537
 538         list_for_each_entry_safe(ibm, itmp,
 539                                  &tpacpi_all_drivers,
 540                                  all_drivers) {
 541                 if (ibm->resume)
 542                         (ibm->resume)();
 543         }
 544
 545         return 0;
 546 }
 547
 548 static struct platform_driver tpacpi_pdriver = {
 549         .driver = {
 550                 .name = IBM_DRVR_NAME,
 551                 .owner = THIS_MODULE,
 552         },
 553         .resume = tpacpi_resume_handler,
 554 };
 555
 556
 557 /*************************************************************************
 558  * thinkpad-acpi driver attributes
 559  */
 560
 561 /* interface_version --------------------------------------------------- */
 562 static ssize_t tpacpi_driver_interface_version_show(
 563                                 struct device_driver *drv,
 564                                 char *buf)
 565 {
 566         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 567 }
 568
 569 static DRIVER_ATTR(interface_version, S_IRUGO,
 570                 tpacpi_driver_interface_version_show, NULL);
 571
 572 /* debug_level --------------------------------------------------------- */
 573 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 574                                                 char *buf)
 575 {
 576         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 577 }
 578
 579 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 580                                                 const char *buf, size_t count)
 581 {
 582         unsigned long t;
 583
 584         if (parse_strtoul(buf, 0xffff, &t))
 585                 return -EINVAL;
 586
 587         dbg_level = t;
 588
 589         return count;
 590 }
 591
 592 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 593                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 594
 595 /* version ------------------------------------------------------------- */
 596 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 597                                                 char *buf)
 598 {
 599         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 600 }
 601
 602 static DRIVER_ATTR(version, S_IRUGO,
 603                 tpacpi_driver_version_show, NULL);
 604
 605 /* --------------------------------------------------------------------- */
 606
 607 static struct driver_attribute* tpacpi_driver_attributes[] = {
 608         &driver_attr_debug_level, &driver_attr_version,
 609         &driver_attr_interface_version,
 610 };
 611
 612 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 613 {
 614         int i, res;
 615
 616         i = 0;
 617         res = 0;
 618         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 619                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 620                 i++;
 621         }
 622
 623         return res;
 624 }
 625
 626 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 627 {
 628         int i;
 629
 630         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 631                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 632 }
 633
 634 /*************************************************************************
 635  * sysfs support helpers
 636  */
 637
 638 struct attribute_set_obj {
 639         struct attribute_set s;
 640         struct attribute *a;
 641 } __attribute__((packed));
 642
 643 static struct attribute_set *create_attr_set(unsigned int max_members,
 644                                                 const char* name)
 645 {
 646         struct attribute_set_obj *sobj;
 647
 648         if (max_members == 0)
 649                 return NULL;
 650
 651         /* Allocates space for implicit NULL at the end too */
 652         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 653                     max_members * sizeof(struct attribute *),
 654                     GFP_KERNEL);
 655         if (!sobj)
 656                 return NULL;
 657         sobj->s.max_members = max_members;
 658         sobj->s.group.attrs = &sobj->a;
 659         sobj->s.group.name = name;
 660
 661         return &sobj->s;
 662 }
 663
 664 /* not multi-threaded safe, use it in a single thread per set */
 665 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 666 {
 667         if (!s || !attr)
 668                 return -EINVAL;
 669
 670         if (s->members >= s->max_members)
 671                 return -ENOMEM;
 672
 673         s->group.attrs[s->members] = attr;
 674         s->members++;
 675
 676         return 0;
 677 }
 678
 679 static int add_many_to_attr_set(struct attribute_set* s,
 680                         struct attribute **attr,
 681                         unsigned int count)
 682 {
 683         int i, res;
 684
 685         for (i = 0; i < count; i++) {
 686                 res = add_to_attr_set(s, attr[i]);
 687                 if (res)
 688                         return res;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 695 {
 696         sysfs_remove_group(kobj, &s->group);
 697         destroy_attr_set(s);
 698 }
 699
 700 static int parse_strtoul(const char *buf,
 701                 unsigned long max, unsigned long *value)
 702 {
 703         char *endp;
 704
 705         *value = simple_strtoul(buf, &endp, 0);
 706         while (*endp && isspace(*endp))
 707                 endp++;
 708         if (*endp || *value > max)
 709                 return -EINVAL;
 710
 711         return 0;
 712 }
 713
 714 /****************************************************************************
 715  ****************************************************************************
 716  *
 717  * Subdrivers
 718  *
 719  ****************************************************************************
 720  ****************************************************************************/
 721
 722 /*************************************************************************
 723  * thinkpad-acpi init subdriver
 724  */
 725
 726 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 727 {
 728         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 729         printk(IBM_INFO "%s\n", IBM_URL);
 730
 731         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
 732                 (thinkpad_id.bios_version_str) ?
 733                         thinkpad_id.bios_version_str : "unknown",
 734                 (thinkpad_id.ec_version_str) ?
 735                         thinkpad_id.ec_version_str : "unknown");
 736
 737         if (thinkpad_id.vendor && thinkpad_id.model_str)
 738                 printk(IBM_INFO "%s %s\n",
 739                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 740                                 "IBM" : ((thinkpad_id.vendor ==
 741                                                 PCI_VENDOR_ID_LENOVO) ?
 742                                         "Lenovo" : "Unknown vendor"),
 743                         thinkpad_id.model_str);
 744
 745         return 0;
 746 }
 747
 748 static int thinkpad_acpi_driver_read(char *p)
 749 {
 750         int len = 0;
 751
 752         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 753         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 754
 755         return len;
 756 }
 757
 758 static struct ibm_struct thinkpad_acpi_driver_data = {
 759         .name = "driver",
 760         .read = thinkpad_acpi_driver_read,
 761 };
 762
 763 /*************************************************************************
 764  * Hotkey subdriver
 765  */
 766
 767 static int hotkey_orig_status;
 768 static u32 hotkey_orig_mask;
 769 static u32 hotkey_all_mask;
 770 static u32 hotkey_reserved_mask;
 771
 772 static u16 *hotkey_keycode_map;
 773
 774 static struct attribute_set *hotkey_dev_attributes;
 775
 776 static int hotkey_get_wlsw(int *status)
 777 {
 778         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 779                 return -EIO;
 780         return 0;
 781 }
 782
 783 /* sysfs hotkey enable ------------------------------------------------- */
 784 static ssize_t hotkey_enable_show(struct device *dev,
 785                            struct device_attribute *attr,
 786                            char *buf)
 787 {
 788         int res, status;
 789         u32 mask;
 790
 791         res = hotkey_get(&status, &mask);
 792         if (res)
 793                 return res;
 794
 795         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 796 }
 797
 798 static ssize_t hotkey_enable_store(struct device *dev,
 799                             struct device_attribute *attr,
 800                             const char *buf, size_t count)
 801 {
 802         unsigned long t;
 803         int res, status;
 804         u32 mask;
 805
 806         if (parse_strtoul(buf, 1, &t))
 807                 return -EINVAL;
 808
 809         res = hotkey_get(&status, &mask);
 810         if (!res)
 811                 res = hotkey_set(t, mask);
 812
 813         return (res) ? res : count;
 814 }
 815
 816 static struct device_attribute dev_attr_hotkey_enable =
 817         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 818                 hotkey_enable_show, hotkey_enable_store);
 819
 820 /* sysfs hotkey mask --------------------------------------------------- */
 821 static ssize_t hotkey_mask_show(struct device *dev,
 822                            struct device_attribute *attr,
 823                            char *buf)
 824 {
 825         int res, status;
 826         u32 mask;
 827
 828         res = hotkey_get(&status, &mask);
 829         if (res)
 830                 return res;
 831
 832         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
 833 }
 834
 835 static ssize_t hotkey_mask_store(struct device *dev,
 836                             struct device_attribute *attr,
 837                             const char *buf, size_t count)
 838 {
 839         unsigned long t;
 840         int res, status;
 841         u32 mask;
 842
 843         if (parse_strtoul(buf, 0xffffffffUL, &t))
 844                 return -EINVAL;
 845
 846         res = hotkey_get(&status, &mask);
 847         if (!res)
 848                 hotkey_set(status, t);
 849
 850         return (res) ? res : count;
 851 }
 852
 853 static struct device_attribute dev_attr_hotkey_mask =
 854         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 855                 hotkey_mask_show, hotkey_mask_store);
 856
 857 /* sysfs hotkey bios_enabled ------------------------------------------- */
 858 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 859                            struct device_attribute *attr,
 860                            char *buf)
 861 {
 862         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 863 }
 864
 865 static struct device_attribute dev_attr_hotkey_bios_enabled =
 866         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 867
 868 /* sysfs hotkey bios_mask ---------------------------------------------- */
 869 static ssize_t hotkey_bios_mask_show(struct device *dev,
 870                            struct device_attribute *attr,
 871                            char *buf)
 872 {
 873         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 874 }
 875
 876 static struct device_attribute dev_attr_hotkey_bios_mask =
 877         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 878
 879 /* sysfs hotkey all_mask ----------------------------------------------- */
 880 static ssize_t hotkey_all_mask_show(struct device *dev,
 881                            struct device_attribute *attr,
 882                            char *buf)
 883 {
 884         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 885 }
 886
 887 static struct device_attribute dev_attr_hotkey_all_mask =
 888         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 889
 890 /* sysfs hotkey recommended_mask --------------------------------------- */
 891 static ssize_t hotkey_recommended_mask_show(struct device *dev,
 892                                             struct device_attribute *attr,
 893                                             char *buf)
 894 {
 895         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
 896                         hotkey_all_mask & ~hotkey_reserved_mask);
 897 }
 898
 899 static struct device_attribute dev_attr_hotkey_recommended_mask =
 900         __ATTR(hotkey_recommended_mask, S_IRUGO,
 901                 hotkey_recommended_mask_show, NULL);
 902
 903 /* sysfs hotkey radio_sw ----------------------------------------------- */
 904 static ssize_t hotkey_radio_sw_show(struct device *dev,
 905                            struct device_attribute *attr,
 906                            char *buf)
 907 {
 908         int res, s;
 909         res = hotkey_get_wlsw(&s);
 910         if (res < 0)
 911                 return res;
 912
 913         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
 914 }
 915
 916 static struct device_attribute dev_attr_hotkey_radio_sw =
 917         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
 918
 919 /* sysfs hotkey report_mode -------------------------------------------- */
 920 static ssize_t hotkey_report_mode_show(struct device *dev,
 921                            struct device_attribute *attr,
 922                            char *buf)
 923 {
 924         return snprintf(buf, PAGE_SIZE, "%d\n",
 925                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
 926 }
 927
 928 static struct device_attribute dev_attr_hotkey_report_mode =
 929         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
 930
 931 /* --------------------------------------------------------------------- */
 932
 933 static struct attribute *hotkey_attributes[] __initdata = {
 934         &dev_attr_hotkey_enable.attr,
 935         &dev_attr_hotkey_report_mode.attr,
 936 };
 937
 938 static struct attribute *hotkey_mask_attributes[] __initdata = {
 939         &dev_attr_hotkey_mask.attr,
 940         &dev_attr_hotkey_bios_enabled.attr,
 941         &dev_attr_hotkey_bios_mask.attr,
 942         &dev_attr_hotkey_all_mask.attr,
 943         &dev_attr_hotkey_recommended_mask.attr,
 944 };
 945
 946 static int __init hotkey_init(struct ibm_init_struct *iibm)
 947 {
 948
 949         static u16 ibm_keycode_map[] __initdata = {
 950                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 951                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
 952                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 953                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 954                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 955                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 956                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 957                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 958                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
 959                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 960                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
 961                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 962                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 963                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 964                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 965                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 966                 KEY_RESERVED,   /* 0x16: MUTE */
 967                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
 968                 /* (assignments unknown, please report if found) */
 969                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 970                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 971         };
 972         static u16 lenovo_keycode_map[] __initdata = {
 973                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
 974                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
 975                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
 976                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
 977                 /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
 978                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
 979                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
 980                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
 981                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
 982                 /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
 983                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
 984                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
 985                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
 986                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
 987                 KEY_RESERVED,   /* 0x14: VOLUME UP */
 988                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
 989                 KEY_RESERVED,   /* 0x16: MUTE */
 990                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
 991                 /* (assignments unknown, please report if found) */
 992                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 993                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
 994         };
 995
 996 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
 997 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
 998 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
 999
1000         int res, i;
1001         int status;
1002         int hkeyv;
1003
1004         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1005
1006         BUG_ON(!tpacpi_inputdev);
1007
1008         IBM_ACPIHANDLE_INIT(hkey);
1009         mutex_init(&hotkey_mutex);
1010
1011         /* hotkey not supported on 570 */
1012         tp_features.hotkey = hkey_handle != NULL;
1013
1014         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1015                 str_supported(tp_features.hotkey));
1016
1017         if (tp_features.hotkey) {
1018                 hotkey_dev_attributes = create_attr_set(8, NULL);
1019                 if (!hotkey_dev_attributes)
1020                         return -ENOMEM;
1021                 res = add_many_to_attr_set(hotkey_dev_attributes,
1022                                 hotkey_attributes,
1023                                 ARRAY_SIZE(hotkey_attributes));
1024                 if (res)
1025                         return res;
1026
1027                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1028                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1029                    for HKEY interface version 0x100 */
1030                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1031                         if ((hkeyv >> 8) != 1) {
1032                                 printk(IBM_ERR "unknown version of the "
1033                                        "HKEY interface: 0x%x\n", hkeyv);
1034                                 printk(IBM_ERR "please report this to %s\n",
1035                                        IBM_MAIL);
1036                         } else {
1037                                 /*
1038                                  * MHKV 0x100 in A31, R40, R40e,
1039                                  * T4x, X31, and later
1040                                  * */
1041                                 tp_features.hotkey_mask = 1;
1042                         }
1043                 }
1044
1045                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1046                         str_supported(tp_features.hotkey_mask));
1047
1048                 if (tp_features.hotkey_mask) {
1049                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1050                                         "MHKA", "qd")) {
1051                                 printk(IBM_ERR
1052                                        "missing MHKA handler, "
1053                                        "please report this to %s\n",
1054                                        IBM_MAIL);
1055                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1056                         }
1057                 }
1058
1059                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
1060                 if (!res && tp_features.hotkey_mask) {
1061                         res = add_many_to_attr_set(hotkey_dev_attributes,
1062                                 hotkey_mask_attributes,
1063                                 ARRAY_SIZE(hotkey_mask_attributes));
1064                 }
1065
1066                 /* Not all thinkpads have a hardware radio switch */
1067                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1068                         tp_features.hotkey_wlsw = 1;
1069                         printk(IBM_INFO
1070                                 "radio switch found; radios are %s\n",
1071                                 enabled(status, 0));
1072                         res = add_to_attr_set(hotkey_dev_attributes,
1073                                         &dev_attr_hotkey_radio_sw.attr);
1074                 }
1075
1076                 if (!res)
1077                         res = register_attr_set_with_sysfs(
1078                                         hotkey_dev_attributes,
1079                                         &tpacpi_pdev->dev.kobj);
1080                 if (res)
1081                         return res;
1082
1083                 /* Set up key map */
1084
1085                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1086                                                 GFP_KERNEL);
1087                 if (!hotkey_keycode_map) {
1088                         printk(IBM_ERR "failed to allocate memory for key map\n");
1089                         return -ENOMEM;
1090                 }
1091
1092                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1093                         dbg_printk(TPACPI_DBG_INIT,
1094                                    "using Lenovo default hot key map\n");
1095                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1096                                 TPACPI_HOTKEY_MAP_SIZE);
1097                 } else {
1098                         dbg_printk(TPACPI_DBG_INIT,
1099                                    "using IBM default hot key map\n");
1100                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1101                                 TPACPI_HOTKEY_MAP_SIZE);
1102                 }
1103
1104                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1105                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1106                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1107                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1108                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1109                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1110                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1111                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1112                                 set_bit(hotkey_keycode_map[i],
1113                                         tpacpi_inputdev->keybit);
1114                         } else {
1115                                 if (i < sizeof(hotkey_reserved_mask)*8)
1116                                         hotkey_reserved_mask |= 1 << i;
1117                         }
1118                 }
1119
1120                 if (tp_features.hotkey_wlsw) {
1121                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1122                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1123                 }
1124
1125                 dbg_printk(TPACPI_DBG_INIT,
1126                                 "enabling hot key handling\n");
1127                 res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
1128                                         | hotkey_orig_mask);
1129                 if (res)
1130                         return res;
1131
1132                 dbg_printk(TPACPI_DBG_INIT,
1133                                 "legacy hot key reporting over procfs %s\n",
1134                                 (hotkey_report_mode < 2) ?
1135                                         "enabled" : "disabled");
1136         }
1137
1138         return (tp_features.hotkey)? 0 : 1;
1139 }
1140
1141 static void hotkey_exit(void)
1142 {
1143         int res;
1144
1145         if (tp_features.hotkey) {
1146                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
1147                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
1148                 if (res)
1149                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
1150         }
1151
1152         if (hotkey_dev_attributes) {
1153                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1154                 hotkey_dev_attributes = NULL;
1155         }
1156 }
1157
1158 static void tpacpi_input_send_key(unsigned int scancode,
1159                                   unsigned int keycode)
1160 {
1161         if (keycode != KEY_RESERVED) {
1162                 mutex_lock(&tpacpi_inputdev_send_mutex);
1163
1164                 input_report_key(tpacpi_inputdev, keycode, 1);
1165                 if (keycode == KEY_UNKNOWN)
1166                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1167                                     scancode);
1168                 input_sync(tpacpi_inputdev);
1169
1170                 input_report_key(tpacpi_inputdev, keycode, 0);
1171                 if (keycode == KEY_UNKNOWN)
1172                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1173                                     scancode);
1174                 input_sync(tpacpi_inputdev);
1175
1176                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1177         }
1178 }
1179
1180 static void tpacpi_input_send_radiosw(void)
1181 {
1182         int wlsw;
1183
1184         mutex_lock(&tpacpi_inputdev_send_mutex);
1185
1186         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1187                 input_report_switch(tpacpi_inputdev,
1188                                     SW_RADIO, !!wlsw);
1189                 input_sync(tpacpi_inputdev);
1190         }
1191
1192         mutex_unlock(&tpacpi_inputdev_send_mutex);
1193 }
1194
1195 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1196 {
1197         u32 hkey;
1198         unsigned int keycode, scancode;
1199         int send_acpi_ev;
1200         int ignore_acpi_ev;
1201
1202         if (event != 0x80) {
1203                 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
1204                 /* forward it to userspace, maybe it knows how to handle it */
1205                 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1206                                                 ibm->acpi->device->dev.bus_id,
1207                                                 event, 0);
1208                 return;
1209         }
1210
1211         while (1) {
1212                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1213                         printk(IBM_ERR "failed to retrieve HKEY event\n");
1214                         return;
1215                 }
1216
1217                 if (hkey == 0) {
1218                         /* queue empty */
1219                         return;
1220                 }
1221
1222                 send_acpi_ev = 0;
1223                 ignore_acpi_ev = 0;
1224
1225                 switch (hkey >> 12) {
1226                 case 1:
1227                         /* 0x1000-0x1FFF: key presses */
1228                         scancode = hkey & 0xfff;
1229                         if (scancode > 0 && scancode < 0x21) {
1230                                 scancode--;
1231                                 keycode = hotkey_keycode_map[scancode];
1232                                 tpacpi_input_send_key(scancode, keycode);
1233                         } else {
1234                                 printk(IBM_ERR
1235                                        "hotkey 0x%04x out of range for keyboard map\n",
1236                                        hkey);
1237                                 send_acpi_ev = 1;
1238                         }
1239                         break;
1240                 case 5:
1241                         /* 0x5000-0x5FFF: LID */
1242                         /* we don't handle it through this path, just
1243                          * eat up known LID events */
1244                         if (hkey != 0x5001 && hkey != 0x5002) {
1245                                 printk(IBM_ERR
1246                                        "unknown LID-related HKEY event: 0x%04x\n",
1247                                        hkey);
1248                                 send_acpi_ev = 1;
1249                         } else {
1250                                 ignore_acpi_ev = 1;
1251                         }
1252                         break;
1253                 case 7:
1254                         /* 0x7000-0x7FFF: misc */
1255                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1256                                 tpacpi_input_send_radiosw();
1257                                 break;
1258                         }
1259                         /* fallthrough to default */
1260                 default:
1261                         /* case 2: dock-related */
1262                         /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1263                         /* case 3: ultra-bay related. maybe bay in dock? */
1264                         /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1265                         printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1266                         send_acpi_ev = 1;
1267                 }
1268
1269                 /* Legacy events */
1270                 if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
1271                         acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1272                 }
1273
1274                 /* netlink events */
1275                 if (!ignore_acpi_ev && send_acpi_ev) {
1276                         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1277                                                         ibm->acpi->device->dev.bus_id,
1278                                                         event, hkey);
1279                 }
1280         }
1281 }
1282
1283 static void hotkey_resume(void)
1284 {
1285         tpacpi_input_send_radiosw();
1286 }
1287
1288 /*
1289  * Call with hotkey_mutex held
1290  */
1291 static int hotkey_get(int *status, u32 *mask)
1292 {
1293         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1294                 return -EIO;
1295
1296         if (tp_features.hotkey_mask)
1297                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
1298                         return -EIO;
1299
1300         return 0;
1301 }
1302
1303 /*
1304  * Call with hotkey_mutex held
1305  */
1306 static int hotkey_set(int status, u32 mask)
1307 {
1308         int i;
1309
1310         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1311                 return -EIO;
1312
1313         if (tp_features.hotkey_mask)
1314                 for (i = 0; i < 32; i++) {
1315                         int bit = ((1 << i) & mask) != 0;
1316                         if (!acpi_evalf(hkey_handle,
1317                                         NULL, "MHKM", "vdd", i + 1, bit))
1318                                 return -EIO;
1319                 }
1320
1321         return 0;
1322 }
1323
1324 /* procfs -------------------------------------------------------------- */
1325 static int hotkey_read(char *p)
1326 {
1327         int res, status;
1328         u32 mask;
1329         int len = 0;
1330
1331         if (!tp_features.hotkey) {
1332                 len += sprintf(p + len, "status:\t\tnot supported\n");
1333                 return len;
1334         }
1335
1336         res = mutex_lock_interruptible(&hotkey_mutex);
1337         if (res < 0)
1338                 return res;
1339         res = hotkey_get(&status, &mask);
1340         mutex_unlock(&hotkey_mutex);
1341         if (res)
1342                 return res;
1343
1344         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1345         if (tp_features.hotkey_mask) {
1346                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1347                 len += sprintf(p + len,
1348                                "commands:\tenable, disable, reset, <mask>\n");
1349         } else {
1350                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1351                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1352         }
1353
1354         return len;
1355 }
1356
1357 static int hotkey_write(char *buf)
1358 {
1359         int res, status;
1360         u32 mask;
1361         char *cmd;
1362         int do_cmd = 0;
1363
1364         if (!tp_features.hotkey)
1365                 return -ENODEV;
1366
1367         res = mutex_lock_interruptible(&hotkey_mutex);
1368         if (res < 0)
1369                 return res;
1370
1371         res = hotkey_get(&status, &mask);
1372         if (res)
1373                 goto errexit;
1374
1375         res = 0;
1376         while ((cmd = next_cmd(&buf))) {
1377                 if (strlencmp(cmd, "enable") == 0) {
1378                         status = 1;
1379                 } else if (strlencmp(cmd, "disable") == 0) {
1380                         status = 0;
1381                 } else if (strlencmp(cmd, "reset") == 0) {
1382                         status = hotkey_orig_status;
1383                         mask = hotkey_orig_mask;
1384                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1385                         /* mask set */
1386                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1387                         /* mask set */
1388                 } else {
1389                         res = -EINVAL;
1390                         goto errexit;
1391                 }
1392                 do_cmd = 1;
1393         }
1394
1395         if (do_cmd)
1396                 res = hotkey_set(status, mask);
1397
1398 errexit:
1399         mutex_unlock(&hotkey_mutex);
1400         return res;
1401 }
1402
1403 static const struct acpi_device_id ibm_htk_device_ids[] = {
1404         {IBM_HKEY_HID, 0},
1405         {"", 0},
1406 };
1407
1408 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1409         .hid = ibm_htk_device_ids,
1410         .notify = hotkey_notify,
1411         .handle = &hkey_handle,
1412         .type = ACPI_DEVICE_NOTIFY,
1413 };
1414
1415 static struct ibm_struct hotkey_driver_data = {
1416         .name = "hotkey",
1417         .read = hotkey_read,
1418         .write = hotkey_write,
1419         .exit = hotkey_exit,
1420         .resume = hotkey_resume,
1421         .acpi = &ibm_hotkey_acpidriver,
1422 };
1423
1424 /*************************************************************************
1425  * Bluetooth subdriver
1426  */
1427
1428 /* sysfs bluetooth enable ---------------------------------------------- */
1429 static ssize_t bluetooth_enable_show(struct device *dev,
1430                            struct device_attribute *attr,
1431                            char *buf)
1432 {
1433         int status;
1434
1435         status = bluetooth_get_radiosw();
1436         if (status < 0)
1437                 return status;
1438
1439         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1440 }
1441
1442 static ssize_t bluetooth_enable_store(struct device *dev,
1443                             struct device_attribute *attr,
1444                             const char *buf, size_t count)
1445 {
1446         unsigned long t;
1447         int res;
1448
1449         if (parse_strtoul(buf, 1, &t))
1450                 return -EINVAL;
1451
1452         res = bluetooth_set_radiosw(t);
1453
1454         return (res) ? res : count;
1455 }
1456
1457 static struct device_attribute dev_attr_bluetooth_enable =
1458         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1459                 bluetooth_enable_show, bluetooth_enable_store);
1460
1461 /* --------------------------------------------------------------------- */
1462
1463 static struct attribute *bluetooth_attributes[] = {
1464         &dev_attr_bluetooth_enable.attr,
1465         NULL
1466 };
1467
1468 static const struct attribute_group bluetooth_attr_group = {
1469         .attrs = bluetooth_attributes,
1470 };
1471
1472 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1473 {
1474         int res;
1475         int status = 0;
1476
1477         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1478
1479         IBM_ACPIHANDLE_INIT(hkey);
1480
1481         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1482            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1483         tp_features.bluetooth = hkey_handle &&
1484             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1485
1486         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1487                 str_supported(tp_features.bluetooth),
1488                 status);
1489
1490         if (tp_features.bluetooth) {
1491                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1492                         /* no bluetooth hardware present in system */
1493                         tp_features.bluetooth = 0;
1494                         dbg_printk(TPACPI_DBG_INIT,
1495                                    "bluetooth hardware not installed\n");
1496                 } else {
1497                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1498                                         &bluetooth_attr_group);
1499                         if (res)
1500                                 return res;
1501                 }
1502         }
1503
1504         return (tp_features.bluetooth)? 0 : 1;
1505 }
1506
1507 static void bluetooth_exit(void)
1508 {
1509         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1510                         &bluetooth_attr_group);
1511 }
1512
1513 static int bluetooth_get_radiosw(void)
1514 {
1515         int status;
1516
1517         if (!tp_features.bluetooth)
1518                 return -ENODEV;
1519
1520         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1521                 return -EIO;
1522
1523         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1524 }
1525
1526 static int bluetooth_set_radiosw(int radio_on)
1527 {
1528         int status;
1529
1530         if (!tp_features.bluetooth)
1531                 return -ENODEV;
1532
1533         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1534                 return -EIO;
1535         if (radio_on)
1536                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1537         else
1538                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1539         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1540                 return -EIO;
1541
1542         return 0;
1543 }
1544
1545 /* procfs -------------------------------------------------------------- */
1546 static int bluetooth_read(char *p)
1547 {
1548         int len = 0;
1549         int status = bluetooth_get_radiosw();
1550
1551         if (!tp_features.bluetooth)
1552                 len += sprintf(p + len, "status:\t\tnot supported\n");
1553         else {
1554                 len += sprintf(p + len, "status:\t\t%s\n",
1555                                 (status)? "enabled" : "disabled");
1556                 len += sprintf(p + len, "commands:\tenable, disable\n");
1557         }
1558
1559         return len;
1560 }
1561
1562 static int bluetooth_write(char *buf)
1563 {
1564         char *cmd;
1565
1566         if (!tp_features.bluetooth)
1567                 return -ENODEV;
1568
1569         while ((cmd = next_cmd(&buf))) {
1570                 if (strlencmp(cmd, "enable") == 0) {
1571                         bluetooth_set_radiosw(1);
1572                 } else if (strlencmp(cmd, "disable") == 0) {
1573                         bluetooth_set_radiosw(0);
1574                 } else
1575                         return -EINVAL;
1576         }
1577
1578         return 0;
1579 }
1580
1581 static struct ibm_struct bluetooth_driver_data = {
1582         .name = "bluetooth",
1583         .read = bluetooth_read,
1584         .write = bluetooth_write,
1585         .exit = bluetooth_exit,
1586 };
1587
1588 /*************************************************************************
1589  * Wan subdriver
1590  */
1591
1592 /* sysfs wan enable ---------------------------------------------------- */
1593 static ssize_t wan_enable_show(struct device *dev,
1594                            struct device_attribute *attr,
1595                            char *buf)
1596 {
1597         int status;
1598
1599         status = wan_get_radiosw();
1600         if (status < 0)
1601                 return status;
1602
1603         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1604 }
1605
1606 static ssize_t wan_enable_store(struct device *dev,
1607                             struct device_attribute *attr,
1608                             const char *buf, size_t count)
1609 {
1610         unsigned long t;
1611         int res;
1612
1613         if (parse_strtoul(buf, 1, &t))
1614                 return -EINVAL;
1615
1616         res = wan_set_radiosw(t);
1617
1618         return (res) ? res : count;
1619 }
1620
1621 static struct device_attribute dev_attr_wan_enable =
1622         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1623                 wan_enable_show, wan_enable_store);
1624
1625 /* --------------------------------------------------------------------- */
1626
1627 static struct attribute *wan_attributes[] = {
1628         &dev_attr_wan_enable.attr,
1629         NULL
1630 };
1631
1632 static const struct attribute_group wan_attr_group = {
1633         .attrs = wan_attributes,
1634 };
1635
1636 static int __init wan_init(struct ibm_init_struct *iibm)
1637 {
1638         int res;
1639         int status = 0;
1640
1641         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1642
1643         IBM_ACPIHANDLE_INIT(hkey);
1644
1645         tp_features.wan = hkey_handle &&
1646             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1647
1648         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1649                 str_supported(tp_features.wan),
1650                 status);
1651
1652         if (tp_features.wan) {
1653                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1654                         /* no wan hardware present in system */
1655                         tp_features.wan = 0;
1656                         dbg_printk(TPACPI_DBG_INIT,
1657                                    "wan hardware not installed\n");
1658                 } else {
1659                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1660                                         &wan_attr_group);
1661                         if (res)
1662                                 return res;
1663                 }
1664         }
1665
1666         return (tp_features.wan)? 0 : 1;
1667 }
1668
1669 static void wan_exit(void)
1670 {
1671         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1672                 &wan_attr_group);
1673 }
1674
1675 static int wan_get_radiosw(void)
1676 {
1677         int status;
1678
1679         if (!tp_features.wan)
1680                 return -ENODEV;
1681
1682         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1683                 return -EIO;
1684
1685         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1686 }
1687
1688 static int wan_set_radiosw(int radio_on)
1689 {
1690         int status;
1691
1692         if (!tp_features.wan)
1693                 return -ENODEV;
1694
1695         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1696                 return -EIO;
1697         if (radio_on)
1698                 status |= TP_ACPI_WANCARD_RADIOSSW;
1699         else
1700                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1701         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1702                 return -EIO;
1703
1704         return 0;
1705 }
1706
1707 /* procfs -------------------------------------------------------------- */
1708 static int wan_read(char *p)
1709 {
1710         int len = 0;
1711         int status = wan_get_radiosw();
1712
1713         if (!tp_features.wan)
1714                 len += sprintf(p + len, "status:\t\tnot supported\n");
1715         else {
1716                 len += sprintf(p + len, "status:\t\t%s\n",
1717                                 (status)? "enabled" : "disabled");
1718                 len += sprintf(p + len, "commands:\tenable, disable\n");
1719         }
1720
1721         return len;
1722 }
1723
1724 static int wan_write(char *buf)
1725 {
1726         char *cmd;
1727
1728         if (!tp_features.wan)
1729                 return -ENODEV;
1730
1731         while ((cmd = next_cmd(&buf))) {
1732                 if (strlencmp(cmd, "enable") == 0) {
1733                         wan_set_radiosw(1);
1734                 } else if (strlencmp(cmd, "disable") == 0) {
1735                         wan_set_radiosw(0);
1736                 } else
1737                         return -EINVAL;
1738         }
1739
1740         return 0;
1741 }
1742
1743 static struct ibm_struct wan_driver_data = {
1744         .name = "wan",
1745         .read = wan_read,
1746         .write = wan_write,
1747         .exit = wan_exit,
1748         .flags.experimental = 1,
1749 };
1750
1751 /*************************************************************************
1752  * Video subdriver
1753  */
1754
1755 static enum video_access_mode video_supported;
1756 static int video_orig_autosw;
1757
1758 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1759            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1760            "\\_SB.PCI0.VID0",   /* 770e */
1761            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1762            "\\_SB.PCI0.AGP.VID",        /* all others */
1763            );                           /* R30, R31 */
1764
1765 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1766
1767 static int __init video_init(struct ibm_init_struct *iibm)
1768 {
1769         int ivga;
1770
1771         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1772
1773         IBM_ACPIHANDLE_INIT(vid);
1774         IBM_ACPIHANDLE_INIT(vid2);
1775
1776         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1777                 /* G41, assume IVGA doesn't change */
1778                 vid_handle = vid2_handle;
1779
1780         if (!vid_handle)
1781                 /* video switching not supported on R30, R31 */
1782                 video_supported = TPACPI_VIDEO_NONE;
1783         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1784                 /* 570 */
1785                 video_supported = TPACPI_VIDEO_570;
1786         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1787                 /* 600e/x, 770e, 770x */
1788                 video_supported = TPACPI_VIDEO_770;
1789         else
1790                 /* all others */
1791                 video_supported = TPACPI_VIDEO_NEW;
1792
1793         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1794                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1795                 video_supported);
1796
1797         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1798 }
1799
1800 static void video_exit(void)
1801 {
1802         dbg_printk(TPACPI_DBG_EXIT,
1803                    "restoring original video autoswitch mode\n");
1804         if (video_autosw_set(video_orig_autosw))
1805                 printk(IBM_ERR "error while trying to restore original "
1806                         "video autoswitch mode\n");
1807 }
1808
1809 static int video_outputsw_get(void)
1810 {
1811         int status = 0;
1812         int i;
1813
1814         switch (video_supported) {
1815         case TPACPI_VIDEO_570:
1816                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1817                                  TP_ACPI_VIDEO_570_PHSCMD))
1818                         return -EIO;
1819                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1820                 break;
1821         case TPACPI_VIDEO_770:
1822                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1823                         return -EIO;
1824                 if (i)
1825                         status |= TP_ACPI_VIDEO_S_LCD;
1826                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1827                         return -EIO;
1828                 if (i)
1829                         status |= TP_ACPI_VIDEO_S_CRT;
1830                 break;
1831         case TPACPI_VIDEO_NEW:
1832                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1833                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1834                         return -EIO;
1835                 if (i)
1836                         status |= TP_ACPI_VIDEO_S_CRT;
1837
1838                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1839                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1840                         return -EIO;
1841                 if (i)
1842                         status |= TP_ACPI_VIDEO_S_LCD;
1843                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1844                         return -EIO;
1845                 if (i)
1846                         status |= TP_ACPI_VIDEO_S_DVI;
1847                 break;
1848         default:
1849                 return -ENOSYS;
1850         }
1851
1852         return status;
1853 }
1854
1855 static int video_outputsw_set(int status)
1856 {
1857         int autosw;
1858         int res = 0;
1859
1860         switch (video_supported) {
1861         case TPACPI_VIDEO_570:
1862                 res = acpi_evalf(NULL, NULL,
1863                                  "\\_SB.PHS2", "vdd",
1864                                  TP_ACPI_VIDEO_570_PHS2CMD,
1865                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1866                 break;
1867         case TPACPI_VIDEO_770:
1868                 autosw = video_autosw_get();
1869                 if (autosw < 0)
1870                         return autosw;
1871
1872                 res = video_autosw_set(1);
1873                 if (res)
1874                         return res;
1875                 res = acpi_evalf(vid_handle, NULL,
1876                                  "ASWT", "vdd", status * 0x100, 0);
1877                 if (!autosw && video_autosw_set(autosw)) {
1878                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1879                         return -EIO;
1880                 }
1881                 break;
1882         case TPACPI_VIDEO_NEW:
1883                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1884                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1885                 break;
1886         default:
1887                 return -ENOSYS;
1888         }
1889
1890         return (res)? 0 : -EIO;
1891 }
1892
1893 static int video_autosw_get(void)
1894 {
1895         int autosw = 0;
1896
1897         switch (video_supported) {
1898         case TPACPI_VIDEO_570:
1899                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1900                         return -EIO;
1901                 break;
1902         case TPACPI_VIDEO_770:
1903         case TPACPI_VIDEO_NEW:
1904                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1905                         return -EIO;
1906                 break;
1907         default:
1908                 return -ENOSYS;
1909         }
1910
1911         return autosw & 1;
1912 }
1913
1914 static int video_autosw_set(int enable)
1915 {
1916         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1917                 return -EIO;
1918         return 0;
1919 }
1920
1921 static int video_outputsw_cycle(void)
1922 {
1923         int autosw = video_autosw_get();
1924         int res;
1925
1926         if (autosw < 0)
1927                 return autosw;
1928
1929         switch (video_supported) {
1930         case TPACPI_VIDEO_570:
1931                 res = video_autosw_set(1);
1932                 if (res)
1933                         return res;
1934                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1935                 break;
1936         case TPACPI_VIDEO_770:
1937         case TPACPI_VIDEO_NEW:
1938                 res = video_autosw_set(1);
1939                 if (res)
1940                         return res;
1941                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1942                 break;
1943         default:
1944                 return -ENOSYS;
1945         }
1946         if (!autosw && video_autosw_set(autosw)) {
1947                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1948                 return -EIO;
1949         }
1950
1951         return (res)? 0 : -EIO;
1952 }
1953
1954 static int video_expand_toggle(void)
1955 {
1956         switch (video_supported) {
1957         case TPACPI_VIDEO_570:
1958                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1959                         0 : -EIO;
1960         case TPACPI_VIDEO_770:
1961                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1962                         0 : -EIO;
1963         case TPACPI_VIDEO_NEW:
1964                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1965                         0 : -EIO;
1966         default:
1967                 return -ENOSYS;
1968         }
1969         /* not reached */
1970 }
1971
1972 static int video_read(char *p)
1973 {
1974         int status, autosw;
1975         int len = 0;
1976
1977         if (video_supported == TPACPI_VIDEO_NONE) {
1978                 len += sprintf(p + len, "status:\t\tnot supported\n");
1979                 return len;
1980         }
1981
1982         status = video_outputsw_get();
1983         if (status < 0)
1984                 return status;
1985
1986         autosw = video_autosw_get();
1987         if (autosw < 0)
1988                 return autosw;
1989
1990         len += sprintf(p + len, "status:\t\tsupported\n");
1991         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1992         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1993         if (video_supported == TPACPI_VIDEO_NEW)
1994                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1995         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1996         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1997         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1998         if (video_supported == TPACPI_VIDEO_NEW)
1999                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2000         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2001         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2002
2003         return len;
2004 }
2005
2006 static int video_write(char *buf)
2007 {
2008         char *cmd;
2009         int enable, disable, status;
2010         int res;
2011
2012         if (video_supported == TPACPI_VIDEO_NONE)
2013                 return -ENODEV;
2014
2015         enable = 0;
2016         disable = 0;
2017
2018         while ((cmd = next_cmd(&buf))) {
2019                 if (strlencmp(cmd, "lcd_enable") == 0) {
2020                         enable |= TP_ACPI_VIDEO_S_LCD;
2021                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2022                         disable |= TP_ACPI_VIDEO_S_LCD;
2023                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2024                         enable |= TP_ACPI_VIDEO_S_CRT;
2025                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2026                         disable |= TP_ACPI_VIDEO_S_CRT;
2027                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2028                            strlencmp(cmd, "dvi_enable") == 0) {
2029                         enable |= TP_ACPI_VIDEO_S_DVI;
2030                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2031                            strlencmp(cmd, "dvi_disable") == 0) {
2032                         disable |= TP_ACPI_VIDEO_S_DVI;
2033                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2034                         res = video_autosw_set(1);
2035                         if (res)
2036                                 return res;
2037                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2038                         res = video_autosw_set(0);
2039                         if (res)
2040                                 return res;
2041                 } else if (strlencmp(cmd, "video_switch") == 0) {
2042                         res = video_outputsw_cycle();
2043                         if (res)
2044                                 return res;
2045                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2046                         res = video_expand_toggle();
2047                         if (res)
2048                                 return res;
2049                 } else
2050                         return -EINVAL;
2051         }
2052
2053         if (enable || disable) {
2054                 status = video_outputsw_get();
2055                 if (status < 0)
2056                         return status;
2057                 res = video_outputsw_set((status & ~disable) | enable);
2058                 if (res)
2059                         return res;
2060         }
2061
2062         return 0;
2063 }
2064
2065 static struct ibm_struct video_driver_data = {
2066         .name = "video",
2067         .read = video_read,
2068         .write = video_write,
2069         .exit = video_exit,
2070 };
2071
2072 /*************************************************************************
2073  * Light (thinklight) subdriver
2074  */
2075
2076 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
2077 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
2078
2079 static int __init light_init(struct ibm_init_struct *iibm)
2080 {
2081         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2082
2083         IBM_ACPIHANDLE_INIT(ledb);
2084         IBM_ACPIHANDLE_INIT(lght);
2085         IBM_ACPIHANDLE_INIT(cmos);
2086
2087         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2088         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2089
2090         if (tp_features.light)
2091                 /* light status not supported on
2092                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2093                 tp_features.light_status =
2094                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2095
2096         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2097                 str_supported(tp_features.light));
2098
2099         return (tp_features.light)? 0 : 1;
2100 }
2101
2102 static int light_read(char *p)
2103 {
2104         int len = 0;
2105         int status = 0;
2106
2107         if (!tp_features.light) {
2108                 len += sprintf(p + len, "status:\t\tnot supported\n");
2109         } else if (!tp_features.light_status) {
2110                 len += sprintf(p + len, "status:\t\tunknown\n");
2111                 len += sprintf(p + len, "commands:\ton, off\n");
2112         } else {
2113                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2114                         return -EIO;
2115                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2116                 len += sprintf(p + len, "commands:\ton, off\n");
2117         }
2118
2119         return len;
2120 }
2121
2122 static int light_write(char *buf)
2123 {
2124         int cmos_cmd, lght_cmd;
2125         char *cmd;
2126         int success;
2127
2128         if (!tp_features.light)
2129                 return -ENODEV;
2130
2131         while ((cmd = next_cmd(&buf))) {
2132                 if (strlencmp(cmd, "on") == 0) {
2133                         cmos_cmd = 0x0c;
2134                         lght_cmd = 1;
2135                 } else if (strlencmp(cmd, "off") == 0) {
2136                         cmos_cmd = 0x0d;
2137                         lght_cmd = 0;
2138                 } else
2139                         return -EINVAL;
2140
2141                 success = cmos_handle ?
2142                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2143                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2144                 if (!success)
2145                         return -EIO;
2146         }
2147
2148         return 0;
2149 }
2150
2151 static struct ibm_struct light_driver_data = {
2152         .name = "light",
2153         .read = light_read,
2154         .write = light_write,
2155 };
2156
2157 /*************************************************************************
2158  * Dock subdriver
2159  */
2160
2161 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2162
2163 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2164            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2165            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2166            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2167     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2168
2169 /* don't list other alternatives as we install a notify handler on the 570 */
2170 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2171
2172 static const struct acpi_device_id ibm_pci_device_ids[] = {
2173         {PCI_ROOT_HID_STRING, 0},
2174         {"", 0},
2175 };
2176
2177 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2178         {
2179          .notify = dock_notify,
2180          .handle = &dock_handle,
2181          .type = ACPI_SYSTEM_NOTIFY,
2182         },
2183         {
2184         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2185          * We just use it to get notifications of dock hotplug
2186          * in very old thinkpads */
2187          .hid = ibm_pci_device_ids,
2188          .notify = dock_notify,
2189          .handle = &pci_handle,
2190          .type = ACPI_SYSTEM_NOTIFY,
2191         },
2192 };
2193
2194 static struct ibm_struct dock_driver_data[2] = {
2195         {
2196          .name = "dock",
2197          .read = dock_read,
2198          .write = dock_write,
2199          .acpi = &ibm_dock_acpidriver[0],
2200         },
2201         {
2202          .name = "dock",
2203          .acpi = &ibm_dock_acpidriver[1],
2204         },
2205 };
2206
2207 #define dock_docked() (_sta(dock_handle) & 1)
2208
2209 static int __init dock_init(struct ibm_init_struct *iibm)
2210 {
2211         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2212
2213         IBM_ACPIHANDLE_INIT(dock);
2214
2215         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2216                 str_supported(dock_handle != NULL));
2217
2218         return (dock_handle)? 0 : 1;
2219 }
2220
2221 static int __init dock_init2(struct ibm_init_struct *iibm)
2222 {
2223         int dock2_needed;
2224
2225         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2226
2227         if (dock_driver_data[0].flags.acpi_driver_registered &&
2228             dock_driver_data[0].flags.acpi_notify_installed) {
2229                 IBM_ACPIHANDLE_INIT(pci);
2230                 dock2_needed = (pci_handle != NULL);
2231                 vdbg_printk(TPACPI_DBG_INIT,
2232                             "dock PCI handler for the TP 570 is %s\n",
2233                             str_supported(dock2_needed));
2234         } else {
2235                 vdbg_printk(TPACPI_DBG_INIT,
2236                 "dock subdriver part 2 not required\n");
2237                 dock2_needed = 0;
2238         }
2239
2240         return (dock2_needed)? 0 : 1;
2241 }
2242
2243 static void dock_notify(struct ibm_struct *ibm, u32 event)
2244 {
2245         int docked = dock_docked();
2246         int pci = ibm->acpi->hid && ibm->acpi->device &&
2247                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2248         int data;
2249
2250         if (event == 1 && !pci) /* 570 */
2251                 data = 1;       /* button */
2252         else if (event == 1 && pci)     /* 570 */
2253                 data = 3;       /* dock */
2254         else if (event == 3 && docked)
2255                 data = 1;       /* button */
2256         else if (event == 3 && !docked)
2257                 data = 2;       /* undock */
2258         else if (event == 0 && docked)
2259                 data = 3;       /* dock */
2260         else {
2261                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2262                        event, _sta(dock_handle));
2263                 data = 0;       /* unknown */
2264         }
2265         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2266         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2267                                           ibm->acpi->device->dev.bus_id,
2268                                           event, data);
2269 }
2270
2271 static int dock_read(char *p)
2272 {
2273         int len = 0;
2274         int docked = dock_docked();
2275
2276         if (!dock_handle)
2277                 len += sprintf(p + len, "status:\t\tnot supported\n");
2278         else if (!docked)
2279                 len += sprintf(p + len, "status:\t\tundocked\n");
2280         else {
2281                 len += sprintf(p + len, "status:\t\tdocked\n");
2282                 len += sprintf(p + len, "commands:\tdock, undock\n");
2283         }
2284
2285         return len;
2286 }
2287
2288 static int dock_write(char *buf)
2289 {
2290         char *cmd;
2291
2292         if (!dock_docked())
2293                 return -ENODEV;
2294
2295         while ((cmd = next_cmd(&buf))) {
2296                 if (strlencmp(cmd, "undock") == 0) {
2297                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2298                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2299                                 return -EIO;
2300                 } else if (strlencmp(cmd, "dock") == 0) {
2301                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2302                                 return -EIO;
2303                 } else
2304                         return -EINVAL;
2305         }
2306
2307         return 0;
2308 }
2309
2310 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2311
2312 /*************************************************************************
2313  * Bay subdriver
2314  */
2315
2316 #ifdef CONFIG_THINKPAD_ACPI_BAY
2317 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2318            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2319            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2320            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2321            );                           /* A21e, R30, R31 */
2322 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2323            "_EJ0",              /* all others */
2324            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2325 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2326            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2327            );                           /* all others */
2328 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2329            "_EJ0",                      /* 770x */
2330            );                           /* all others */
2331
2332 static int __init bay_init(struct ibm_init_struct *iibm)
2333 {
2334         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2335
2336         IBM_ACPIHANDLE_INIT(bay);
2337         if (bay_handle)
2338                 IBM_ACPIHANDLE_INIT(bay_ej);
2339         IBM_ACPIHANDLE_INIT(bay2);
2340         if (bay2_handle)
2341                 IBM_ACPIHANDLE_INIT(bay2_ej);
2342
2343         tp_features.bay_status = bay_handle &&
2344                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2345         tp_features.bay_status2 = bay2_handle &&
2346                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2347
2348         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2349                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2350         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2351                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2352
2353         vdbg_printk(TPACPI_DBG_INIT,
2354                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2355                 str_supported(tp_features.bay_status),
2356                 str_supported(tp_features.bay_eject),
2357                 str_supported(tp_features.bay_status2),
2358                 str_supported(tp_features.bay_eject2));
2359
2360         return (tp_features.bay_status || tp_features.bay_eject ||
2361                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2362 }
2363
2364 static void bay_notify(struct ibm_struct *ibm, u32 event)
2365 {
2366         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2367         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2368                                           ibm->acpi->device->dev.bus_id,
2369                                           event, 0);
2370 }
2371
2372 #define bay_occupied(b) (_sta(b##_handle) & 1)
2373
2374 static int bay_read(char *p)
2375 {
2376         int len = 0;
2377         int occupied = bay_occupied(bay);
2378         int occupied2 = bay_occupied(bay2);
2379         int eject, eject2;
2380
2381         len += sprintf(p + len, "status:\t\t%s\n",
2382                 tp_features.bay_status ?
2383                         (occupied ? "occupied" : "unoccupied") :
2384                                 "not supported");
2385         if (tp_features.bay_status2)
2386                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2387                                "occupied" : "unoccupied");
2388
2389         eject = tp_features.bay_eject && occupied;
2390         eject2 = tp_features.bay_eject2 && occupied2;
2391
2392         if (eject && eject2)
2393                 len += sprintf(p + len, "commands:\teject, eject2\n");
2394         else if (eject)
2395                 len += sprintf(p + len, "commands:\teject\n");
2396         else if (eject2)
2397                 len += sprintf(p + len, "commands:\teject2\n");
2398
2399         return len;
2400 }
2401
2402 static int bay_write(char *buf)
2403 {
2404         char *cmd;
2405
2406         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2407                 return -ENODEV;
2408
2409         while ((cmd = next_cmd(&buf))) {
2410                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2411                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2412                                 return -EIO;
2413                 } else if (tp_features.bay_eject2 &&
2414                            strlencmp(cmd, "eject2") == 0) {
2415                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2416                                 return -EIO;
2417                 } else
2418                         return -EINVAL;
2419         }
2420
2421         return 0;
2422 }
2423
2424 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2425         .notify = bay_notify,
2426         .handle = &bay_handle,
2427         .type = ACPI_SYSTEM_NOTIFY,
2428 };
2429
2430 static struct ibm_struct bay_driver_data = {
2431         .name = "bay",
2432         .read = bay_read,
2433         .write = bay_write,
2434         .acpi = &ibm_bay_acpidriver,
2435 };
2436
2437 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2438
2439 /*************************************************************************
2440  * CMOS subdriver
2441  */
2442
2443 /* sysfs cmos_command -------------------------------------------------- */
2444 static ssize_t cmos_command_store(struct device *dev,
2445                             struct device_attribute *attr,
2446                             const char *buf, size_t count)
2447 {
2448         unsigned long cmos_cmd;
2449         int res;
2450
2451         if (parse_strtoul(buf, 21, &cmos_cmd))
2452                 return -EINVAL;
2453
2454         res = issue_thinkpad_cmos_command(cmos_cmd);
2455         return (res)? res : count;
2456 }
2457
2458 static struct device_attribute dev_attr_cmos_command =
2459         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2460
2461 /* --------------------------------------------------------------------- */
2462
2463 static int __init cmos_init(struct ibm_init_struct *iibm)
2464 {
2465         int res;
2466
2467         vdbg_printk(TPACPI_DBG_INIT,
2468                 "initializing cmos commands subdriver\n");
2469
2470         IBM_ACPIHANDLE_INIT(cmos);
2471
2472         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2473                 str_supported(cmos_handle != NULL));
2474
2475         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2476         if (res)
2477                 return res;
2478
2479         return (cmos_handle)? 0 : 1;
2480 }
2481
2482 static void cmos_exit(void)
2483 {
2484         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2485 }
2486
2487 static int cmos_read(char *p)
2488 {
2489         int len = 0;
2490
2491         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2492            R30, R31, T20-22, X20-21 */
2493         if (!cmos_handle)
2494                 len += sprintf(p + len, "status:\t\tnot supported\n");
2495         else {
2496                 len += sprintf(p + len, "status:\t\tsupported\n");
2497                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2498         }
2499
2500         return len;
2501 }
2502
2503 static int cmos_write(char *buf)
2504 {
2505         char *cmd;
2506         int cmos_cmd, res;
2507
2508         while ((cmd = next_cmd(&buf))) {
2509                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2510                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2511                         /* cmos_cmd set */
2512                 } else
2513                         return -EINVAL;
2514
2515                 res = issue_thinkpad_cmos_command(cmos_cmd);
2516                 if (res)
2517                         return res;
2518         }
2519
2520         return 0;
2521 }
2522
2523 static struct ibm_struct cmos_driver_data = {
2524         .name = "cmos",
2525         .read = cmos_read,
2526         .write = cmos_write,
2527         .exit = cmos_exit,
2528 };
2529
2530 /*************************************************************************
2531  * LED subdriver
2532  */
2533
2534 static enum led_access_mode led_supported;
2535
2536 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2537            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2538            "LED",               /* all others */
2539            );                   /* R30, R31 */
2540
2541 static int __init led_init(struct ibm_init_struct *iibm)
2542 {
2543         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2544
2545         IBM_ACPIHANDLE_INIT(led);
2546
2547         if (!led_handle)
2548                 /* led not supported on R30, R31 */
2549                 led_supported = TPACPI_LED_NONE;
2550         else if (strlencmp(led_path, "SLED") == 0)
2551                 /* 570 */
2552                 led_supported = TPACPI_LED_570;
2553         else if (strlencmp(led_path, "SYSL") == 0)
2554                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2555                 led_supported = TPACPI_LED_OLD;
2556         else
2557                 /* all others */
2558                 led_supported = TPACPI_LED_NEW;
2559
2560         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2561                 str_supported(led_supported), led_supported);
2562
2563         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2564 }
2565
2566 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2567
2568 static int led_read(char *p)
2569 {
2570         int len = 0;
2571
2572         if (!led_supported) {
2573                 len += sprintf(p + len, "status:\t\tnot supported\n");
2574                 return len;
2575         }
2576         len += sprintf(p + len, "status:\t\tsupported\n");
2577
2578         if (led_supported == TPACPI_LED_570) {
2579                 /* 570 */
2580                 int i, status;
2581                 for (i = 0; i < 8; i++) {
2582                         if (!acpi_evalf(ec_handle,
2583                                         &status, "GLED", "dd", 1 << i))
2584                                 return -EIO;
2585                         len += sprintf(p + len, "%d:\t\t%s\n",
2586                                        i, led_status(status));
2587                 }
2588         }
2589
2590         len += sprintf(p + len, "commands:\t"
2591                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2592
2593         return len;
2594 }
2595
2596 /* off, on, blink */
2597 static const int led_sled_arg1[] = { 0, 1, 3 };
2598 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2599 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2600 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2601
2602 static int led_write(char *buf)
2603 {
2604         char *cmd;
2605         int led, ind, ret;
2606
2607         if (!led_supported)
2608                 return -ENODEV;
2609
2610         while ((cmd = next_cmd(&buf))) {
2611                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2612                         return -EINVAL;
2613
2614                 if (strstr(cmd, "off")) {
2615                         ind = 0;
2616                 } else if (strstr(cmd, "on")) {
2617                         ind = 1;
2618                 } else if (strstr(cmd, "blink")) {
2619                         ind = 2;
2620                 } else
2621                         return -EINVAL;
2622
2623                 if (led_supported == TPACPI_LED_570) {
2624                         /* 570 */
2625                         led = 1 << led;
2626                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2627                                         led, led_sled_arg1[ind]))
2628                                 return -EIO;
2629                 } else if (led_supported == TPACPI_LED_OLD) {
2630                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2631                         led = 1 << led;
2632                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2633                         if (ret >= 0)
2634                                 ret =
2635                                     ec_write(TPACPI_LED_EC_HLBL,
2636                                              led * led_exp_hlbl[ind]);
2637                         if (ret >= 0)
2638                                 ret =
2639                                     ec_write(TPACPI_LED_EC_HLCL,
2640                                              led * led_exp_hlcl[ind]);
2641                         if (ret < 0)
2642                                 return ret;
2643                 } else {
2644                         /* all others */
2645                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2646                                         led, led_led_arg1[ind]))
2647                                 return -EIO;
2648                 }
2649         }
2650
2651         return 0;
2652 }
2653
2654 static struct ibm_struct led_driver_data = {
2655         .name = "led",
2656         .read = led_read,
2657         .write = led_write,
2658 };
2659
2660 /*************************************************************************
2661  * Beep subdriver
2662  */
2663
2664 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2665
2666 static int __init beep_init(struct ibm_init_struct *iibm)
2667 {
2668         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2669
2670         IBM_ACPIHANDLE_INIT(beep);
2671
2672         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2673                 str_supported(beep_handle != NULL));
2674
2675         return (beep_handle)? 0 : 1;
2676 }
2677
2678 static int beep_read(char *p)
2679 {
2680         int len = 0;
2681
2682         if (!beep_handle)
2683                 len += sprintf(p + len, "status:\t\tnot supported\n");
2684         else {
2685                 len += sprintf(p + len, "status:\t\tsupported\n");
2686                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2687         }
2688
2689         return len;
2690 }
2691
2692 static int beep_write(char *buf)
2693 {
2694         char *cmd;
2695         int beep_cmd;
2696
2697         if (!beep_handle)
2698                 return -ENODEV;
2699
2700         while ((cmd = next_cmd(&buf))) {
2701                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2702                     beep_cmd >= 0 && beep_cmd <= 17) {
2703                         /* beep_cmd set */
2704                 } else
2705                         return -EINVAL;
2706                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2707                         return -EIO;
2708         }
2709
2710         return 0;
2711 }
2712
2713 static struct ibm_struct beep_driver_data = {
2714         .name = "beep",
2715         .read = beep_read,
2716         .write = beep_write,
2717 };
2718
2719 /*************************************************************************
2720  * Thermal subdriver
2721  */
2722
2723 static enum thermal_access_mode thermal_read_mode;
2724
2725 /* sysfs temp##_input -------------------------------------------------- */
2726
2727 static ssize_t thermal_temp_input_show(struct device *dev,
2728                            struct device_attribute *attr,
2729                            char *buf)
2730 {
2731         struct sensor_device_attribute *sensor_attr =
2732                                         to_sensor_dev_attr(attr);
2733         int idx = sensor_attr->index;
2734         s32 value;
2735         int res;
2736
2737         res = thermal_get_sensor(idx, &value);
2738         if (res)
2739                 return res;
2740         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2741                 return -ENXIO;
2742
2743         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2744 }
2745
2746 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2747          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2748
2749 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2750         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2751         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2752         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2753         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2754         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2755         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2756         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2757         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2758         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2759         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2760         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2761         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2762         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2763         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2764         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2765         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2766 };
2767
2768 #define THERMAL_ATTRS(X) \
2769         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2770
2771 static struct attribute *thermal_temp_input_attr[] = {
2772         THERMAL_ATTRS(8),
2773         THERMAL_ATTRS(9),
2774         THERMAL_ATTRS(10),
2775         THERMAL_ATTRS(11),
2776         THERMAL_ATTRS(12),
2777         THERMAL_ATTRS(13),
2778         THERMAL_ATTRS(14),
2779         THERMAL_ATTRS(15),
2780         THERMAL_ATTRS(0),
2781         THERMAL_ATTRS(1),
2782         THERMAL_ATTRS(2),
2783         THERMAL_ATTRS(3),
2784         THERMAL_ATTRS(4),
2785         THERMAL_ATTRS(5),
2786         THERMAL_ATTRS(6),
2787         THERMAL_ATTRS(7),
2788         NULL
2789 };
2790
2791 static const struct attribute_group thermal_temp_input16_group = {
2792         .attrs = thermal_temp_input_attr
2793 };
2794
2795 static const struct attribute_group thermal_temp_input8_group = {
2796         .attrs = &thermal_temp_input_attr[8]
2797 };
2798
2799 #undef THERMAL_SENSOR_ATTR_TEMP
2800 #undef THERMAL_ATTRS
2801
2802 /* --------------------------------------------------------------------- */
2803
2804 static int __init thermal_init(struct ibm_init_struct *iibm)
2805 {
2806         u8 t, ta1, ta2;
2807         int i;
2808         int acpi_tmp7;
2809         int res;
2810
2811         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2812
2813         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2814
2815         if (thinkpad_id.ec_model) {
2816                 /*
2817                  * Direct EC access mode: sensors at registers
2818                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2819                  * non-implemented, thermal sensors return 0x80 when
2820                  * not available
2821                  */
2822
2823                 ta1 = ta2 = 0;
2824                 for (i = 0; i < 8; i++) {
2825                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2826                                 ta1 |= t;
2827                         } else {
2828                                 ta1 = 0;
2829                                 break;
2830                         }
2831                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2832                                 ta2 |= t;
2833                         } else {
2834                                 ta1 = 0;
2835                                 break;
2836                         }
2837                 }
2838                 if (ta1 == 0) {
2839                         /* This is sheer paranoia, but we handle it anyway */
2840                         if (acpi_tmp7) {
2841                                 printk(IBM_ERR
2842                                        "ThinkPad ACPI EC access misbehaving, "
2843                                        "falling back to ACPI TMPx access mode\n");
2844                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2845                         } else {
2846                                 printk(IBM_ERR
2847                                        "ThinkPad ACPI EC access misbehaving, "
2848                                        "disabling thermal sensors access\n");
2849                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2850                         }
2851                 } else {
2852                         thermal_read_mode =
2853                             (ta2 != 0) ?
2854                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2855                 }
2856         } else if (acpi_tmp7) {
2857                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2858                         /* 600e/x, 770e, 770x */
2859                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2860                 } else {
2861                         /* Standard ACPI TMPx access, max 8 sensors */
2862                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2863                 }
2864         } else {
2865                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2866                 thermal_read_mode = TPACPI_THERMAL_NONE;
2867         }
2868
2869         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2870                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2871                 thermal_read_mode);
2872
2873         switch(thermal_read_mode) {
2874         case TPACPI_THERMAL_TPEC_16:
2875                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2876                                 &thermal_temp_input16_group);
2877                 if (res)
2878                         return res;
2879                 break;
2880         case TPACPI_THERMAL_TPEC_8:
2881         case TPACPI_THERMAL_ACPI_TMP07:
2882         case TPACPI_THERMAL_ACPI_UPDT:
2883                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2884                                 &thermal_temp_input8_group);
2885                 if (res)
2886                         return res;
2887                 break;
2888         case TPACPI_THERMAL_NONE:
2889         default:
2890                 return 1;
2891         }
2892
2893         return 0;
2894 }
2895
2896 static void thermal_exit(void)
2897 {
2898         switch(thermal_read_mode) {
2899         case TPACPI_THERMAL_TPEC_16:
2900                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2901                                    &thermal_temp_input16_group);
2902                 break;
2903         case TPACPI_THERMAL_TPEC_8:
2904         case TPACPI_THERMAL_ACPI_TMP07:
2905         case TPACPI_THERMAL_ACPI_UPDT:
2906                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2907                                    &thermal_temp_input16_group);
2908                 break;
2909         case TPACPI_THERMAL_NONE:
2910         default:
2911                 break;
2912         }
2913 }
2914
2915 /* idx is zero-based */
2916 static int thermal_get_sensor(int idx, s32 *value)
2917 {
2918         int t;
2919         s8 tmp;
2920         char tmpi[5];
2921
2922         t = TP_EC_THERMAL_TMP0;
2923
2924         switch (thermal_read_mode) {
2925 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2926         case TPACPI_THERMAL_TPEC_16:
2927                 if (idx >= 8 && idx <= 15) {
2928                         t = TP_EC_THERMAL_TMP8;
2929                         idx -= 8;
2930                 }
2931                 /* fallthrough */
2932 #endif
2933         case TPACPI_THERMAL_TPEC_8:
2934                 if (idx <= 7) {
2935                         if (!acpi_ec_read(t + idx, &tmp))
2936                                 return -EIO;
2937                         *value = tmp * 1000;
2938                         return 0;
2939                 }
2940                 break;
2941
2942         case TPACPI_THERMAL_ACPI_UPDT:
2943                 if (idx <= 7) {
2944                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2945                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2946                                 return -EIO;
2947                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2948                                 return -EIO;
2949                         *value = (t - 2732) * 100;
2950                         return 0;
2951                 }
2952                 break;
2953
2954         case TPACPI_THERMAL_ACPI_TMP07:
2955                 if (idx <= 7) {
2956                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2957                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2958                                 return -EIO;
2959                         if (t > 127 || t < -127)
2960                                 t = TP_EC_THERMAL_TMP_NA;
2961                         *value = t * 1000;
2962                         return 0;
2963                 }
2964                 break;
2965
2966         case TPACPI_THERMAL_NONE:
2967         default:
2968                 return -ENOSYS;
2969         }
2970
2971         return -EINVAL;
2972 }
2973
2974 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2975 {
2976         int res, i;
2977         int n;
2978
2979         n = 8;
2980         i = 0;
2981
2982         if (!s)
2983                 return -EINVAL;
2984
2985         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2986                 n = 16;
2987
2988         for(i = 0 ; i < n; i++) {
2989                 res = thermal_get_sensor(i, &s->temp[i]);
2990                 if (res)
2991                         return res;
2992         }
2993
2994         return n;
2995 }
2996
2997 static int thermal_read(char *p)
2998 {
2999         int len = 0;
3000         int n, i;
3001         struct ibm_thermal_sensors_struct t;
3002
3003         n = thermal_get_sensors(&t);
3004         if (unlikely(n < 0))
3005                 return n;
3006
3007         len += sprintf(p + len, "temperatures:\t");
3008
3009         if (n > 0) {
3010                 for (i = 0; i < (n - 1); i++)
3011                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3012                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3013         } else
3014                 len += sprintf(p + len, "not supported\n");
3015
3016         return len;
3017 }
3018
3019 static struct ibm_struct thermal_driver_data = {
3020         .name = "thermal",
3021         .read = thermal_read,
3022         .exit = thermal_exit,
3023 };
3024
3025 /*************************************************************************
3026  * EC Dump subdriver
3027  */
3028
3029 static u8 ecdump_regs[256];
3030
3031 static int ecdump_read(char *p)
3032 {
3033         int len = 0;
3034         int i, j;
3035         u8 v;
3036
3037         len += sprintf(p + len, "EC      "
3038                        " +00 +01 +02 +03 +04 +05 +06 +07"
3039                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3040         for (i = 0; i < 256; i += 16) {
3041                 len += sprintf(p + len, "EC 0x%02x:", i);
3042                 for (j = 0; j < 16; j++) {
3043                         if (!acpi_ec_read(i + j, &v))
3044                                 break;
3045                         if (v != ecdump_regs[i + j])
3046                                 len += sprintf(p + len, " *%02x", v);
3047                         else
3048                                 len += sprintf(p + len, "  %02x", v);
3049                         ecdump_regs[i + j] = v;
3050                 }
3051                 len += sprintf(p + len, "\n");
3052                 if (j != 16)
3053                         break;
3054         }
3055
3056         /* These are way too dangerous to advertise openly... */
3057 #if 0
3058         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
3059                        " (<offset> is 00-ff, <value> is 00-ff)\n");
3060         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
3061                        " (<offset> is 00-ff, <value> is 0-255)\n");
3062 #endif
3063         return len;
3064 }
3065
3066 static int ecdump_write(char *buf)
3067 {
3068         char *cmd;
3069         int i, v;
3070
3071         while ((cmd = next_cmd(&buf))) {
3072                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3073                         /* i and v set */
3074                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3075                         /* i and v set */
3076                 } else
3077                         return -EINVAL;
3078                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3079                         if (!acpi_ec_write(i, v))
3080                                 return -EIO;
3081                 } else
3082                         return -EINVAL;
3083         }
3084
3085         return 0;
3086 }
3087
3088 static struct ibm_struct ecdump_driver_data = {
3089         .name = "ecdump",
3090         .read = ecdump_read,
3091         .write = ecdump_write,
3092         .flags.experimental = 1,
3093 };
3094
3095 /*************************************************************************
3096  * Backlight/brightness subdriver
3097  */
3098
3099 static struct backlight_device *ibm_backlight_device;
3100
3101 static struct backlight_ops ibm_backlight_data = {
3102         .get_brightness = brightness_get,
3103         .update_status  = brightness_update_status,
3104 };
3105
3106 static struct mutex brightness_mutex;
3107
3108 static int __init brightness_init(struct ibm_init_struct *iibm)
3109 {
3110         int b;
3111
3112         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3113
3114         mutex_init(&brightness_mutex);
3115
3116         if (!brightness_mode) {
3117                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3118                         brightness_mode = 2;
3119                 else
3120                         brightness_mode = 3;
3121
3122                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3123                         brightness_mode);
3124         }
3125
3126         if (brightness_mode > 3)
3127                 return -EINVAL;
3128
3129         b = brightness_get(NULL);
3130         if (b < 0)
3131                 return 1;
3132
3133         ibm_backlight_device = backlight_device_register(
3134                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3135                                         &ibm_backlight_data);
3136         if (IS_ERR(ibm_backlight_device)) {
3137                 printk(IBM_ERR "Could not register backlight device\n");
3138                 return PTR_ERR(ibm_backlight_device);
3139         }
3140         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3141
3142         ibm_backlight_device->props.max_brightness = 7;
3143         ibm_backlight_device->props.brightness = b;
3144         backlight_update_status(ibm_backlight_device);
3145
3146         return 0;
3147 }
3148
3149 static void brightness_exit(void)
3150 {
3151         if (ibm_backlight_device) {
3152                 vdbg_printk(TPACPI_DBG_EXIT,
3153                             "calling backlight_device_unregister()\n");
3154                 backlight_device_unregister(ibm_backlight_device);
3155                 ibm_backlight_device = NULL;
3156         }
3157 }
3158
3159 static int brightness_update_status(struct backlight_device *bd)
3160 {
3161         return brightness_set(
3162                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3163                  bd->props.power == FB_BLANK_UNBLANK) ?
3164                                 bd->props.brightness : 0);
3165 }
3166
3167 /*
3168  * ThinkPads can read brightness from two places: EC 0x31, or
3169  * CMOS NVRAM byte 0x5E, bits 0-3.
3170  */
3171 static int brightness_get(struct backlight_device *bd)
3172 {
3173         u8 lec = 0, lcmos = 0, level = 0;
3174
3175         if (brightness_mode & 1) {
3176                 if (!acpi_ec_read(brightness_offset, &lec))
3177                         return -EIO;
3178                 lec &= 7;
3179                 level = lec;
3180         };
3181         if (brightness_mode & 2) {
3182                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3183                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3184                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3185                 level = lcmos;
3186         }
3187
3188         if (brightness_mode == 3 && lec != lcmos) {
3189                 printk(IBM_ERR
3190                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3191                         "on display brightness level\n",
3192                         (unsigned int) lcmos,
3193                         (unsigned int) lec);
3194                 return -EIO;
3195         }
3196
3197         return level;
3198 }
3199
3200 static int brightness_set(int value)
3201 {
3202         int cmos_cmd, inc, i, res;
3203         int current_value;
3204
3205         if (value > 7)
3206                 return -EINVAL;
3207
3208         res = mutex_lock_interruptible(&brightness_mutex);
3209         if (res < 0)
3210                 return res;
3211
3212         current_value = brightness_get(NULL);
3213         if (current_value < 0) {
3214                 res = current_value;
3215                 goto errout;
3216         }
3217
3218         cmos_cmd = value > current_value ?
3219                         TP_CMOS_BRIGHTNESS_UP :
3220                         TP_CMOS_BRIGHTNESS_DOWN;
3221         inc = value > current_value ? 1 : -1;
3222
3223         res = 0;
3224         for (i = current_value; i != value; i += inc) {
3225                 if ((brightness_mode & 2) &&
3226                     issue_thinkpad_cmos_command(cmos_cmd)) {
3227                         res = -EIO;
3228                         goto errout;
3229                 }
3230                 if ((brightness_mode & 1) &&
3231                     !acpi_ec_write(brightness_offset, i + inc)) {
3232                         res = -EIO;
3233                         goto errout;;
3234                 }
3235         }
3236
3237 errout:
3238         mutex_unlock(&brightness_mutex);
3239         return res;
3240 }
3241
3242 static int brightness_read(char *p)
3243 {
3244         int len = 0;
3245         int level;
3246
3247         if ((level = brightness_get(NULL)) < 0) {
3248                 len += sprintf(p + len, "level:\t\tunreadable\n");
3249         } else {
3250                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
3251                 len += sprintf(p + len, "commands:\tup, down\n");
3252                 len += sprintf(p + len, "commands:\tlevel <level>"
3253                                " (<level> is 0-7)\n");
3254         }
3255
3256         return len;
3257 }
3258
3259 static int brightness_write(char *buf)
3260 {
3261         int level;
3262         int new_level;
3263         char *cmd;
3264
3265         while ((cmd = next_cmd(&buf))) {
3266                 if ((level = brightness_get(NULL)) < 0)
3267                         return level;
3268                 level &= 7;
3269
3270                 if (strlencmp(cmd, "up") == 0) {
3271                         new_level = level == 7 ? 7 : level + 1;
3272                 } else if (strlencmp(cmd, "down") == 0) {
3273                         new_level = level == 0 ? 0 : level - 1;
3274                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3275                            new_level >= 0 && new_level <= 7) {
3276                         /* new_level set */
3277                 } else
3278                         return -EINVAL;
3279
3280                 brightness_set(new_level);
3281         }
3282
3283         return 0;
3284 }
3285
3286 static struct ibm_struct brightness_driver_data = {
3287         .name = "brightness",
3288         .read = brightness_read,
3289         .write = brightness_write,
3290         .exit = brightness_exit,
3291 };
3292
3293 /*************************************************************************
3294  * Volume subdriver
3295  */
3296
3297 static int volume_read(char *p)
3298 {
3299         int len = 0;
3300         u8 level;
3301
3302         if (!acpi_ec_read(volume_offset, &level)) {
3303                 len += sprintf(p + len, "level:\t\tunreadable\n");
3304         } else {
3305                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3306                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3307                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3308                 len += sprintf(p + len, "commands:\tlevel <level>"
3309                                " (<level> is 0-15)\n");
3310         }
3311
3312         return len;
3313 }
3314
3315 static int volume_write(char *buf)
3316 {
3317         int cmos_cmd, inc, i;
3318         u8 level, mute;
3319         int new_level, new_mute;
3320         char *cmd;
3321
3322         while ((cmd = next_cmd(&buf))) {
3323                 if (!acpi_ec_read(volume_offset, &level))
3324                         return -EIO;
3325                 new_mute = mute = level & 0x40;
3326                 new_level = level = level & 0xf;
3327
3328                 if (strlencmp(cmd, "up") == 0) {
3329                         if (mute)
3330                                 new_mute = 0;
3331                         else
3332                                 new_level = level == 15 ? 15 : level + 1;
3333                 } else if (strlencmp(cmd, "down") == 0) {
3334                         if (mute)
3335                                 new_mute = 0;
3336                         else
3337                                 new_level = level == 0 ? 0 : level - 1;
3338                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3339                            new_level >= 0 && new_level <= 15) {
3340                         /* new_level set */
3341                 } else if (strlencmp(cmd, "mute") == 0) {
3342                         new_mute = 0x40;
3343                 } else
3344                         return -EINVAL;
3345
3346                 if (new_level != level) {       /* mute doesn't change */
3347                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3348                         inc = new_level > level ? 1 : -1;
3349
3350                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3351                                      !acpi_ec_write(volume_offset, level)))
3352                                 return -EIO;
3353
3354                         for (i = level; i != new_level; i += inc)
3355                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3356                                     !acpi_ec_write(volume_offset, i + inc))
3357                                         return -EIO;
3358
3359                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3360                                      !acpi_ec_write(volume_offset,
3361                                                     new_level + mute)))
3362                                 return -EIO;
3363                 }
3364
3365                 if (new_mute != mute) { /* level doesn't change */
3366                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3367
3368                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3369                             !acpi_ec_write(volume_offset, level + new_mute))
3370                                 return -EIO;
3371                 }
3372         }
3373
3374         return 0;
3375 }
3376
3377 static struct ibm_struct volume_driver_data = {
3378         .name = "volume",
3379         .read = volume_read,
3380         .write = volume_write,
3381 };
3382
3383 /*************************************************************************
3384  * Fan subdriver
3385  */
3386
3387 /*
3388  * FAN ACCESS MODES
3389  *
3390  * TPACPI_FAN_RD_ACPI_GFAN:
3391  *      ACPI GFAN method: returns fan level
3392  *
3393  *      see TPACPI_FAN_WR_ACPI_SFAN
3394  *      EC 0x2f (HFSP) not available if GFAN exists
3395  *
3396  * TPACPI_FAN_WR_ACPI_SFAN:
3397  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3398  *
3399  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3400  *      it for writing.
3401  *
3402  * TPACPI_FAN_WR_TPEC:
3403  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3404  *      Supported on almost all ThinkPads
3405  *
3406  *      Fan speed changes of any sort (including those caused by the
3407  *      disengaged mode) are usually done slowly by the firmware as the
3408  *      maximum ammount of fan duty cycle change per second seems to be
3409  *      limited.
3410  *
3411  *      Reading is not available if GFAN exists.
3412  *      Writing is not available if SFAN exists.
3413  *
3414  *      Bits
3415  *       7      automatic mode engaged;
3416  *              (default operation mode of the ThinkPad)
3417  *              fan level is ignored in this mode.
3418  *       6      full speed mode (takes precedence over bit 7);
3419  *              not available on all thinkpads.  May disable
3420  *              the tachometer while the fan controller ramps up
3421  *              the speed (which can take up to a few *minutes*).
3422  *              Speeds up fan to 100% duty-cycle, which is far above
3423  *              the standard RPM levels.  It is not impossible that
3424  *              it could cause hardware damage.
3425  *      5-3     unused in some models.  Extra bits for fan level
3426  *              in others, but still useless as all values above
3427  *              7 map to the same speed as level 7 in these models.
3428  *      2-0     fan level (0..7 usually)
3429  *                      0x00 = stop
3430  *                      0x07 = max (set when temperatures critical)
3431  *              Some ThinkPads may have other levels, see
3432  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3433  *
3434  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3435  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3436  *      does so, its initial value is meaningless (0x07).
3437  *
3438  *      For firmware bugs, refer to:
3439  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3440  *
3441  *      ----
3442  *
3443  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3444  *      Main fan tachometer reading (in RPM)
3445  *
3446  *      This register is present on all ThinkPads with a new-style EC, and
3447  *      it is known not to be present on the A21m/e, and T22, as there is
3448  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3449  *      ThinkPads from this same time period (and earlier) probably lack the
3450  *      tachometer as well.
3451  *
3452  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3453  *      was never fixed by IBM to report the EC firmware version string
3454  *      probably support the tachometer (like the early X models), so
3455  *      detecting it is quite hard.  We need more data to know for sure.
3456  *
3457  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3458  *      might result.
3459  *
3460  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3461  *      mode.
3462  *
3463  *      For firmware bugs, refer to:
3464  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3465  *
3466  * TPACPI_FAN_WR_ACPI_FANS:
3467  *      ThinkPad X31, X40, X41.  Not available in the X60.
3468  *
3469  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3470  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3471  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3472  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3473  *
3474  *      The speeds are stored on handles
3475  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3476  *
3477  *      There are three default speed sets, acessible as handles:
3478  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3479  *
3480  *      ACPI DSDT switches which set is in use depending on various
3481  *      factors.
3482  *
3483  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3484  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3485  *      but the ACPI tables just mention level 7.
3486  */
3487
3488 static enum fan_status_access_mode fan_status_access_mode;
3489 static enum fan_control_access_mode fan_control_access_mode;
3490 static enum fan_control_commands fan_control_commands;
3491
3492 static u8 fan_control_initial_status;
3493 static u8 fan_control_desired_level;
3494
3495 static void fan_watchdog_fire(struct work_struct *ignored);
3496 static int fan_watchdog_maxinterval;
3497 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3498
3499 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3500 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3501            "\\FSPD",            /* 600e/x, 770e, 770x */
3502            );                   /* all others */
3503 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3504            "JFNS",              /* 770x-JL */
3505            );                   /* all others */
3506
3507 /*
3508  * SYSFS fan layout: hwmon compatible (device)
3509  *
3510  * pwm*_enable:
3511  *      0: "disengaged" mode
3512  *      1: manual mode
3513  *      2: native EC "auto" mode (recommended, hardware default)
3514  *
3515  * pwm*: set speed in manual mode, ignored otherwise.
3516  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3517  *      interpolation.
3518  *
3519  * fan*_input: tachometer reading, RPM
3520  *
3521  *
3522  * SYSFS fan layout: extensions
3523  *
3524  * fan_watchdog (driver):
3525  *      fan watchdog interval in seconds, 0 disables (default), max 120
3526  */
3527
3528 /* sysfs fan pwm1_enable ----------------------------------------------- */
3529 static ssize_t fan_pwm1_enable_show(struct device *dev,
3530                                     struct device_attribute *attr,
3531                                     char *buf)
3532 {
3533         int res, mode;
3534         u8 status;
3535
3536         res = fan_get_status_safe(&status);
3537         if (res)
3538                 return res;
3539
3540         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3541                 if (status != fan_control_initial_status) {
3542                         tp_features.fan_ctrl_status_undef = 0;
3543                 } else {
3544                         /* Return most likely status. In fact, it
3545                          * might be the only possible status */
3546                         status = TP_EC_FAN_AUTO;
3547                 }
3548         }
3549
3550         if (status & TP_EC_FAN_FULLSPEED) {
3551                 mode = 0;
3552         } else if (status & TP_EC_FAN_AUTO) {
3553                 mode = 2;
3554         } else
3555                 mode = 1;
3556
3557         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3558 }
3559
3560 static ssize_t fan_pwm1_enable_store(struct device *dev,
3561                                      struct device_attribute *attr,
3562                                      const char *buf, size_t count)
3563 {
3564         unsigned long t;
3565         int res, level;
3566
3567         if (parse_strtoul(buf, 2, &t))
3568                 return -EINVAL;
3569
3570         switch (t) {
3571         case 0:
3572                 level = TP_EC_FAN_FULLSPEED;
3573                 break;
3574         case 1:
3575                 level = TPACPI_FAN_LAST_LEVEL;
3576                 break;
3577         case 2:
3578                 level = TP_EC_FAN_AUTO;
3579                 break;
3580         case 3:
3581                 /* reserved for software-controlled auto mode */
3582                 return -ENOSYS;
3583         default:
3584                 return -EINVAL;
3585         }
3586
3587         res = fan_set_level_safe(level);
3588         if (res == -ENXIO)
3589                 return -EINVAL;
3590         else if (res < 0)
3591                 return res;
3592
3593         fan_watchdog_reset();
3594
3595         return count;
3596 }
3597
3598 static struct device_attribute dev_attr_fan_pwm1_enable =
3599         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3600                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3601
3602 /* sysfs fan pwm1 ------------------------------------------------------ */
3603 static ssize_t fan_pwm1_show(struct device *dev,
3604                              struct device_attribute *attr,
3605                              char *buf)
3606 {
3607         int res;
3608         u8 status;
3609
3610         res = fan_get_status_safe(&status);
3611         if (res)
3612                 return res;
3613
3614         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3615                 if (status != fan_control_initial_status) {
3616                         tp_features.fan_ctrl_status_undef = 0;
3617                 } else {
3618                         status = TP_EC_FAN_AUTO;
3619                 }
3620         }
3621
3622         if ((status &
3623              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3624                 status = fan_control_desired_level;
3625
3626         if (status > 7)
3627                 status = 7;
3628
3629         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3630 }
3631
3632 static ssize_t fan_pwm1_store(struct device *dev,
3633                               struct device_attribute *attr,
3634                               const char *buf, size_t count)
3635 {
3636         unsigned long s;
3637         int rc;
3638         u8 status, newlevel;
3639
3640         if (parse_strtoul(buf, 255, &s))
3641                 return -EINVAL;
3642
3643         /* scale down from 0-255 to 0-7 */
3644         newlevel = (s >> 5) & 0x07;
3645
3646         rc = mutex_lock_interruptible(&fan_mutex);
3647         if (rc < 0)
3648                 return rc;
3649
3650         rc = fan_get_status(&status);
3651         if (!rc && (status &
3652                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3653                 rc = fan_set_level(newlevel);
3654                 if (rc == -ENXIO)
3655                         rc = -EINVAL;
3656                 else if (!rc) {
3657                         fan_update_desired_level(newlevel);
3658                         fan_watchdog_reset();
3659                 }
3660         }
3661
3662         mutex_unlock(&fan_mutex);
3663         return (rc)? rc : count;
3664 }
3665
3666 static struct device_attribute dev_attr_fan_pwm1 =
3667         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3668                 fan_pwm1_show, fan_pwm1_store);
3669
3670 /* sysfs fan fan1_input ------------------------------------------------ */
3671 static ssize_t fan_fan1_input_show(struct device *dev,
3672                            struct device_attribute *attr,
3673                            char *buf)
3674 {
3675         int res;
3676         unsigned int speed;
3677
3678         res = fan_get_speed(&speed);
3679         if (res < 0)
3680                 return res;
3681
3682         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3683 }
3684
3685 static struct device_attribute dev_attr_fan_fan1_input =
3686         __ATTR(fan1_input, S_IRUGO,
3687                 fan_fan1_input_show, NULL);
3688
3689 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3690 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3691                                      char *buf)
3692 {
3693         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3694 }
3695
3696 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3697                                       const char *buf, size_t count)
3698 {
3699         unsigned long t;
3700
3701         if (parse_strtoul(buf, 120, &t))
3702                 return -EINVAL;
3703
3704         if (!fan_control_allowed)
3705                 return -EPERM;
3706
3707         fan_watchdog_maxinterval = t;
3708         fan_watchdog_reset();
3709
3710         return count;
3711 }
3712
3713 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3714                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3715
3716 /* --------------------------------------------------------------------- */
3717 static struct attribute *fan_attributes[] = {
3718         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3719         &dev_attr_fan_fan1_input.attr,
3720         NULL
3721 };
3722
3723 static const struct attribute_group fan_attr_group = {
3724         .attrs = fan_attributes,
3725 };
3726
3727 static int __init fan_init(struct ibm_init_struct *iibm)
3728 {
3729         int rc;
3730
3731         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3732
3733         mutex_init(&fan_mutex);
3734         fan_status_access_mode = TPACPI_FAN_NONE;
3735         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3736         fan_control_commands = 0;
3737         fan_watchdog_maxinterval = 0;
3738         tp_features.fan_ctrl_status_undef = 0;
3739         fan_control_desired_level = 7;
3740
3741         IBM_ACPIHANDLE_INIT(fans);
3742         IBM_ACPIHANDLE_INIT(gfan);
3743         IBM_ACPIHANDLE_INIT(sfan);
3744
3745         if (gfan_handle) {
3746                 /* 570, 600e/x, 770e, 770x */
3747                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3748         } else {
3749                 /* all other ThinkPads: note that even old-style
3750                  * ThinkPad ECs supports the fan control register */
3751                 if (likely(acpi_ec_read(fan_status_offset,
3752                                         &fan_control_initial_status))) {
3753                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3754
3755                         /* In some ThinkPads, neither the EC nor the ACPI
3756                          * DSDT initialize the fan status, and it ends up
3757                          * being set to 0x07 when it *could* be either
3758                          * 0x07 or 0x80.
3759                          *
3760                          * Enable for TP-1Y (T43), TP-78 (R51e),
3761                          * TP-76 (R52), TP-70 (T43, R52), which are known
3762                          * to be buggy. */
3763                         if (fan_control_initial_status == 0x07) {
3764                                 switch (thinkpad_id.ec_model) {
3765                                 case 0x5931: /* TP-1Y */
3766                                 case 0x3837: /* TP-78 */
3767                                 case 0x3637: /* TP-76 */
3768                                 case 0x3037: /* TP-70 */
3769                                         printk(IBM_NOTICE
3770                                                "fan_init: initial fan status is "
3771                                                "unknown, assuming it is in auto "
3772                                                "mode\n");
3773                                         tp_features.fan_ctrl_status_undef = 1;
3774                                         ;;
3775                                 }
3776                         }
3777                 } else {
3778                         printk(IBM_ERR
3779                                "ThinkPad ACPI EC access misbehaving, "
3780                                "fan status and control unavailable\n");
3781                         return 1;
3782                 }
3783         }
3784
3785         if (sfan_handle) {
3786                 /* 570, 770x-JL */
3787                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3788                 fan_control_commands |=
3789                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3790         } else {
3791                 if (!gfan_handle) {
3792                         /* gfan without sfan means no fan control */
3793                         /* all other models implement TP EC 0x2f control */
3794
3795                         if (fans_handle) {
3796                                 /* X31, X40, X41 */
3797                                 fan_control_access_mode =
3798                                     TPACPI_FAN_WR_ACPI_FANS;
3799                                 fan_control_commands |=
3800                                     TPACPI_FAN_CMD_SPEED |
3801                                     TPACPI_FAN_CMD_LEVEL |
3802                                     TPACPI_FAN_CMD_ENABLE;
3803                         } else {
3804                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3805                                 fan_control_commands |=
3806                                     TPACPI_FAN_CMD_LEVEL |
3807                                     TPACPI_FAN_CMD_ENABLE;
3808                         }
3809                 }
3810         }
3811
3812         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3813                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3814                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3815                 fan_status_access_mode, fan_control_access_mode);
3816
3817         /* fan control master switch */
3818         if (!fan_control_allowed) {
3819                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3820                 fan_control_commands = 0;
3821                 dbg_printk(TPACPI_DBG_INIT,
3822                            "fan control features disabled by parameter\n");
3823         }
3824
3825         /* update fan_control_desired_level */
3826         if (fan_status_access_mode != TPACPI_FAN_NONE)
3827                 fan_get_status_safe(NULL);
3828
3829         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3830             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3831                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3832                                          &fan_attr_group);
3833                 if (!(rc < 0))
3834                         rc = driver_create_file(&tpacpi_pdriver.driver,
3835                                         &driver_attr_fan_watchdog);
3836                 if (rc < 0)
3837                         return rc;
3838                 return 0;
3839         } else
3840                 return 1;
3841 }
3842
3843 /*
3844  * Call with fan_mutex held
3845  */
3846 static void fan_update_desired_level(u8 status)
3847 {
3848         if ((status &
3849              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3850                 if (status > 7)
3851                         fan_control_desired_level = 7;
3852                 else
3853                         fan_control_desired_level = status;
3854         }
3855 }
3856
3857 static int fan_get_status(u8 *status)
3858 {
3859         u8 s;
3860
3861         /* TODO:
3862          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3863
3864         switch (fan_status_access_mode) {
3865         case TPACPI_FAN_RD_ACPI_GFAN:
3866                 /* 570, 600e/x, 770e, 770x */
3867
3868                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3869                         return -EIO;
3870
3871                 if (likely(status))
3872                         *status = s & 0x07;
3873
3874                 break;
3875
3876         case TPACPI_FAN_RD_TPEC:
3877                 /* all except 570, 600e/x, 770e, 770x */
3878                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3879                         return -EIO;
3880
3881                 if (likely(status))
3882                         *status = s;
3883
3884                 break;
3885
3886         default:
3887                 return -ENXIO;
3888         }
3889
3890         return 0;
3891 }
3892
3893 static int fan_get_status_safe(u8 *status)
3894 {
3895         int rc;
3896         u8 s;
3897
3898         rc = mutex_lock_interruptible(&fan_mutex);
3899         if (rc < 0)
3900                 return rc;
3901         rc = fan_get_status(&s);
3902         if (!rc)
3903                 fan_update_desired_level(s);
3904         mutex_unlock(&fan_mutex);
3905
3906         if (status)
3907                 *status = s;
3908
3909         return rc;
3910 }
3911
3912 static void fan_exit(void)
3913 {
3914         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3915
3916         /* FIXME: can we really do this unconditionally? */
3917         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3918         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3919
3920         cancel_delayed_work(&fan_watchdog_task);
3921         flush_scheduled_work();
3922 }
3923
3924 static int fan_get_speed(unsigned int *speed)
3925 {
3926         u8 hi, lo;
3927
3928         switch (fan_status_access_mode) {
3929         case TPACPI_FAN_RD_TPEC:
3930                 /* all except 570, 600e/x, 770e, 770x */
3931                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3932                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3933                         return -EIO;
3934
3935                 if (likely(speed))
3936                         *speed = (hi << 8) | lo;
3937
3938                 break;
3939
3940         default:
3941                 return -ENXIO;
3942         }
3943
3944         return 0;
3945 }
3946
3947 static void fan_watchdog_fire(struct work_struct *ignored)
3948 {
3949         int rc;
3950
3951         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
3952                 return;
3953
3954         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3955         rc = fan_set_enable();
3956         if (rc < 0) {
3957                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3958                         "will try again later...\n", -rc);
3959                 /* reschedule for later */
3960                 fan_watchdog_reset();
3961         }
3962 }
3963
3964 static void fan_watchdog_reset(void)
3965 {
3966         static int fan_watchdog_active;
3967
3968         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3969                 return;
3970
3971         if (fan_watchdog_active)
3972                 cancel_delayed_work(&fan_watchdog_task);
3973
3974         if (fan_watchdog_maxinterval > 0 &&
3975             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
3976                 fan_watchdog_active = 1;
3977                 if (!schedule_delayed_work(&fan_watchdog_task,
3978                                 msecs_to_jiffies(fan_watchdog_maxinterval
3979                                                  * 1000))) {
3980                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3981                                "watchdog will not trigger\n");
3982                 }
3983         } else
3984                 fan_watchdog_active = 0;
3985 }
3986
3987 static int fan_set_level(int level)
3988 {
3989         if (!fan_control_allowed)
3990                 return -EPERM;
3991
3992         switch (fan_control_access_mode) {
3993         case TPACPI_FAN_WR_ACPI_SFAN:
3994                 if (level >= 0 && level <= 7) {
3995                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3996                                 return -EIO;
3997                 } else
3998                         return -EINVAL;
3999                 break;
4000
4001         case TPACPI_FAN_WR_ACPI_FANS:
4002         case TPACPI_FAN_WR_TPEC:
4003                 if ((level != TP_EC_FAN_AUTO) &&
4004                     (level != TP_EC_FAN_FULLSPEED) &&
4005                     ((level < 0) || (level > 7)))
4006                         return -EINVAL;
4007
4008                 /* safety net should the EC not support AUTO
4009                  * or FULLSPEED mode bits and just ignore them */
4010                 if (level & TP_EC_FAN_FULLSPEED)
4011                         level |= 7;     /* safety min speed 7 */
4012                 else if (level & TP_EC_FAN_FULLSPEED)
4013                         level |= 4;     /* safety min speed 4 */
4014
4015                 if (!acpi_ec_write(fan_status_offset, level))
4016                         return -EIO;
4017                 else
4018                         tp_features.fan_ctrl_status_undef = 0;
4019                 break;
4020
4021         default:
4022                 return -ENXIO;
4023         }
4024         return 0;
4025 }
4026
4027 static int fan_set_level_safe(int level)
4028 {
4029         int rc;
4030
4031         if (!fan_control_allowed)
4032                 return -EPERM;
4033
4034         rc = mutex_lock_interruptible(&fan_mutex);
4035         if (rc < 0)
4036                 return rc;
4037
4038         if (level == TPACPI_FAN_LAST_LEVEL)
4039                 level = fan_control_desired_level;
4040
4041         rc = fan_set_level(level);
4042         if (!rc)
4043                 fan_update_desired_level(level);
4044
4045         mutex_unlock(&fan_mutex);
4046         return rc;
4047 }
4048
4049 static int fan_set_enable(void)
4050 {
4051         u8 s;
4052         int rc;
4053
4054         if (!fan_control_allowed)
4055                 return -EPERM;
4056
4057         rc = mutex_lock_interruptible(&fan_mutex);
4058         if (rc < 0)
4059                 return rc;
4060
4061         switch (fan_control_access_mode) {
4062         case TPACPI_FAN_WR_ACPI_FANS:
4063         case TPACPI_FAN_WR_TPEC:
4064                 rc = fan_get_status(&s);
4065                 if (rc < 0)
4066                         break;
4067
4068                 /* Don't go out of emergency fan mode */
4069                 if (s != 7) {
4070                         s &= 0x07;
4071                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4072                 }
4073
4074                 if (!acpi_ec_write(fan_status_offset, s))
4075                         rc = -EIO;
4076                 else {
4077                         tp_features.fan_ctrl_status_undef = 0;
4078                         rc = 0;
4079                 }
4080                 break;
4081
4082         case TPACPI_FAN_WR_ACPI_SFAN:
4083                 rc = fan_get_status(&s);
4084                 if (rc < 0)
4085                         break;
4086
4087                 s &= 0x07;
4088
4089                 /* Set fan to at least level 4 */
4090                 s |= 4;
4091
4092                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4093                         rc= -EIO;
4094                 else
4095                         rc = 0;
4096                 break;
4097
4098         default:
4099                 rc = -ENXIO;
4100         }
4101
4102         mutex_unlock(&fan_mutex);
4103         return rc;
4104 }
4105
4106 static int fan_set_disable(void)
4107 {
4108         int rc;
4109
4110         if (!fan_control_allowed)
4111                 return -EPERM;
4112
4113         rc = mutex_lock_interruptible(&fan_mutex);
4114         if (rc < 0)
4115                 return rc;
4116
4117         rc = 0;
4118         switch (fan_control_access_mode) {
4119         case TPACPI_FAN_WR_ACPI_FANS:
4120         case TPACPI_FAN_WR_TPEC:
4121                 if (!acpi_ec_write(fan_status_offset, 0x00))
4122                         rc = -EIO;
4123                 else {
4124                         fan_control_desired_level = 0;
4125                         tp_features.fan_ctrl_status_undef = 0;
4126                 }
4127                 break;
4128
4129         case TPACPI_FAN_WR_ACPI_SFAN:
4130                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4131                         rc = -EIO;
4132                 else
4133                         fan_control_desired_level = 0;
4134                 break;
4135
4136         default:
4137                 rc = -ENXIO;
4138         }
4139
4140
4141         mutex_unlock(&fan_mutex);
4142         return rc;
4143 }
4144
4145 static int fan_set_speed(int speed)
4146 {
4147         int rc;
4148
4149         if (!fan_control_allowed)
4150                 return -EPERM;
4151
4152         rc = mutex_lock_interruptible(&fan_mutex);
4153         if (rc < 0)
4154                 return rc;
4155
4156         rc = 0;
4157         switch (fan_control_access_mode) {
4158         case TPACPI_FAN_WR_ACPI_FANS:
4159                 if (speed >= 0 && speed <= 65535) {
4160                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4161                                         speed, speed, speed))
4162                                 rc = -EIO;
4163                 } else
4164                         rc = -EINVAL;
4165                 break;
4166
4167         default:
4168                 rc = -ENXIO;
4169         }
4170
4171         mutex_unlock(&fan_mutex);
4172         return rc;
4173 }
4174
4175 static int fan_read(char *p)
4176 {
4177         int len = 0;
4178         int rc;
4179         u8 status;
4180         unsigned int speed = 0;
4181
4182         switch (fan_status_access_mode) {
4183         case TPACPI_FAN_RD_ACPI_GFAN:
4184                 /* 570, 600e/x, 770e, 770x */
4185                 if ((rc = fan_get_status_safe(&status)) < 0)
4186                         return rc;
4187
4188                 len += sprintf(p + len, "status:\t\t%s\n"
4189                                "level:\t\t%d\n",
4190                                (status != 0) ? "enabled" : "disabled", status);
4191                 break;
4192
4193         case TPACPI_FAN_RD_TPEC:
4194                 /* all except 570, 600e/x, 770e, 770x */
4195                 if ((rc = fan_get_status_safe(&status)) < 0)
4196                         return rc;
4197
4198                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4199                         if (status != fan_control_initial_status)
4200                                 tp_features.fan_ctrl_status_undef = 0;
4201                         else
4202                                 /* Return most likely status. In fact, it
4203                                  * might be the only possible status */
4204                                 status = TP_EC_FAN_AUTO;
4205                 }
4206
4207                 len += sprintf(p + len, "status:\t\t%s\n",
4208                                (status != 0) ? "enabled" : "disabled");
4209
4210                 if ((rc = fan_get_speed(&speed)) < 0)
4211                         return rc;
4212
4213                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4214
4215                 if (status & TP_EC_FAN_FULLSPEED)
4216                         /* Disengaged mode takes precedence */
4217                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4218                 else if (status & TP_EC_FAN_AUTO)
4219                         len += sprintf(p + len, "level:\t\tauto\n");
4220                 else
4221                         len += sprintf(p + len, "level:\t\t%d\n", status);
4222                 break;
4223
4224         case TPACPI_FAN_NONE:
4225         default:
4226                 len += sprintf(p + len, "status:\t\tnot supported\n");
4227         }
4228
4229         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4230                 len += sprintf(p + len, "commands:\tlevel <level>");
4231
4232                 switch (fan_control_access_mode) {
4233                 case TPACPI_FAN_WR_ACPI_SFAN:
4234                         len += sprintf(p + len, " (<level> is 0-7)\n");
4235                         break;
4236
4237                 default:
4238                         len += sprintf(p + len, " (<level> is 0-7, "
4239                                        "auto, disengaged, full-speed)\n");
4240                         break;
4241                 }
4242         }
4243
4244         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4245                 len += sprintf(p + len, "commands:\tenable, disable\n"
4246                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4247                                "1-120 (seconds))\n");
4248
4249         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4250                 len += sprintf(p + len, "commands:\tspeed <speed>"
4251                                " (<speed> is 0-65535)\n");
4252
4253         return len;
4254 }
4255
4256 static int fan_write_cmd_level(const char *cmd, int *rc)
4257 {
4258         int level;
4259
4260         if (strlencmp(cmd, "level auto") == 0)
4261                 level = TP_EC_FAN_AUTO;
4262         else if ((strlencmp(cmd, "level disengaged") == 0) |
4263                  (strlencmp(cmd, "level full-speed") == 0))
4264                 level = TP_EC_FAN_FULLSPEED;
4265         else if (sscanf(cmd, "level %d", &level) != 1)
4266                 return 0;
4267
4268         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4269                 printk(IBM_ERR "level command accepted for unsupported "
4270                        "access mode %d", fan_control_access_mode);
4271
4272         return 1;
4273 }
4274
4275 static int fan_write_cmd_enable(const char *cmd, int *rc)
4276 {
4277         if (strlencmp(cmd, "enable") != 0)
4278                 return 0;
4279
4280         if ((*rc = fan_set_enable()) == -ENXIO)
4281                 printk(IBM_ERR "enable command accepted for unsupported "
4282                        "access mode %d", fan_control_access_mode);
4283
4284         return 1;
4285 }
4286
4287 static int fan_write_cmd_disable(const char *cmd, int *rc)
4288 {
4289         if (strlencmp(cmd, "disable") != 0)
4290                 return 0;
4291
4292         if ((*rc = fan_set_disable()) == -ENXIO)
4293                 printk(IBM_ERR "disable command accepted for unsupported "
4294                        "access mode %d", fan_control_access_mode);
4295
4296         return 1;
4297 }
4298
4299 static int fan_write_cmd_speed(const char *cmd, int *rc)
4300 {
4301         int speed;
4302
4303         /* TODO:
4304          * Support speed <low> <medium> <high> ? */
4305
4306         if (sscanf(cmd, "speed %d", &speed) != 1)
4307                 return 0;
4308
4309         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4310                 printk(IBM_ERR "speed command accepted for unsupported "
4311                        "access mode %d", fan_control_access_mode);
4312
4313         return 1;
4314 }
4315
4316 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4317 {
4318         int interval;
4319
4320         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4321                 return 0;
4322
4323         if (interval < 0 || interval > 120)
4324                 *rc = -EINVAL;
4325         else
4326                 fan_watchdog_maxinterval = interval;
4327
4328         return 1;
4329 }
4330
4331 static int fan_write(char *buf)
4332 {
4333         char *cmd;
4334         int rc = 0;
4335
4336         while (!rc && (cmd = next_cmd(&buf))) {
4337                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4338                       fan_write_cmd_level(cmd, &rc)) &&
4339                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4340                       (fan_write_cmd_enable(cmd, &rc) ||
4341                        fan_write_cmd_disable(cmd, &rc) ||
4342                        fan_write_cmd_watchdog(cmd, &rc))) &&
4343                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4344                       fan_write_cmd_speed(cmd, &rc))
4345                     )
4346                         rc = -EINVAL;
4347                 else if (!rc)
4348                         fan_watchdog_reset();
4349         }
4350
4351         return rc;
4352 }
4353
4354 static struct ibm_struct fan_driver_data = {
4355         .name = "fan",
4356         .read = fan_read,
4357         .write = fan_write,
4358         .exit = fan_exit,
4359 };
4360
4361 /****************************************************************************
4362  ****************************************************************************
4363  *
4364  * Infrastructure
4365  *
4366  ****************************************************************************
4367  ****************************************************************************/
4368
4369 /* /proc support */
4370 static struct proc_dir_entry *proc_dir;
4371
4372 /* Subdriver registry */
4373 static LIST_HEAD(tpacpi_all_drivers);
4374
4375
4376 /*
4377  * Module and infrastructure proble, init and exit handling
4378  */
4379
4380 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4381 static const char * __init str_supported(int is_supported)
4382 {
4383         static char text_unsupported[] __initdata = "not supported";
4384
4385         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4386 }
4387 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4388
4389 static int __init ibm_init(struct ibm_init_struct *iibm)
4390 {
4391         int ret;
4392         struct ibm_struct *ibm = iibm->data;
4393         struct proc_dir_entry *entry;
4394
4395         BUG_ON(ibm == NULL);
4396
4397         INIT_LIST_HEAD(&ibm->all_drivers);
4398
4399         if (ibm->flags.experimental && !experimental)
4400                 return 0;
4401
4402         dbg_printk(TPACPI_DBG_INIT,
4403                 "probing for %s\n", ibm->name);
4404
4405         if (iibm->init) {
4406                 ret = iibm->init(iibm);
4407                 if (ret > 0)
4408                         return 0;       /* probe failed */
4409                 if (ret)
4410                         return ret;
4411
4412                 ibm->flags.init_called = 1;
4413         }
4414
4415         if (ibm->acpi) {
4416                 if (ibm->acpi->hid) {
4417                         ret = register_tpacpi_subdriver(ibm);
4418                         if (ret)
4419                                 goto err_out;
4420                 }
4421
4422                 if (ibm->acpi->notify) {
4423                         ret = setup_acpi_notify(ibm);
4424                         if (ret == -ENODEV) {
4425                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4426                                         ibm->name);
4427                                 ret = 0;
4428                                 goto err_out;
4429                         }
4430                         if (ret < 0)
4431                                 goto err_out;
4432                 }
4433         }
4434
4435         dbg_printk(TPACPI_DBG_INIT,
4436                 "%s installed\n", ibm->name);
4437
4438         if (ibm->read) {
4439                 entry = create_proc_entry(ibm->name,
4440                                           S_IFREG | S_IRUGO | S_IWUSR,
4441                                           proc_dir);
4442                 if (!entry) {
4443                         printk(IBM_ERR "unable to create proc entry %s\n",
4444                                ibm->name);
4445                         ret = -ENODEV;
4446                         goto err_out;
4447                 }
4448                 entry->owner = THIS_MODULE;
4449                 entry->data = ibm;
4450                 entry->read_proc = &dispatch_procfs_read;
4451                 if (ibm->write)
4452                         entry->write_proc = &dispatch_procfs_write;
4453                 ibm->flags.proc_created = 1;
4454         }
4455
4456         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4457
4458         return 0;
4459
4460 err_out:
4461         dbg_printk(TPACPI_DBG_INIT,
4462                 "%s: at error exit path with result %d\n",
4463                 ibm->name, ret);
4464
4465         ibm_exit(ibm);
4466         return (ret < 0)? ret : 0;
4467 }
4468
4469 static void ibm_exit(struct ibm_struct *ibm)
4470 {
4471         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4472
4473         list_del_init(&ibm->all_drivers);
4474
4475         if (ibm->flags.acpi_notify_installed) {
4476                 dbg_printk(TPACPI_DBG_EXIT,
4477                         "%s: acpi_remove_notify_handler\n", ibm->name);
4478                 BUG_ON(!ibm->acpi);
4479                 acpi_remove_notify_handler(*ibm->acpi->handle,
4480                                            ibm->acpi->type,
4481                                            dispatch_acpi_notify);
4482                 ibm->flags.acpi_notify_installed = 0;
4483                 ibm->flags.acpi_notify_installed = 0;
4484         }
4485
4486         if (ibm->flags.proc_created) {
4487                 dbg_printk(TPACPI_DBG_EXIT,
4488                         "%s: remove_proc_entry\n", ibm->name);
4489                 remove_proc_entry(ibm->name, proc_dir);
4490                 ibm->flags.proc_created = 0;
4491         }
4492
4493         if (ibm->flags.acpi_driver_registered) {
4494                 dbg_printk(TPACPI_DBG_EXIT,
4495                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4496                 BUG_ON(!ibm->acpi);
4497                 acpi_bus_unregister_driver(ibm->acpi->driver);
4498                 kfree(ibm->acpi->driver);
4499                 ibm->acpi->driver = NULL;
4500                 ibm->flags.acpi_driver_registered = 0;
4501         }
4502
4503         if (ibm->flags.init_called && ibm->exit) {
4504                 ibm->exit();
4505                 ibm->flags.init_called = 0;
4506         }
4507
4508         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4509 }
4510
4511 /* Probing */
4512
4513 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4514 {
4515         struct dmi_device *dev = NULL;
4516         char ec_fw_string[18];
4517
4518         if (!tp)
4519                 return;
4520
4521         memset(tp, 0, sizeof(*tp));
4522
4523         if (dmi_name_in_vendors("IBM"))
4524                 tp->vendor = PCI_VENDOR_ID_IBM;
4525         else if (dmi_name_in_vendors("LENOVO"))
4526                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4527         else
4528                 return;
4529
4530         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4531                                         GFP_KERNEL);
4532         if (!tp->bios_version_str)
4533                 return;
4534         tp->bios_model = tp->bios_version_str[0]
4535                          | (tp->bios_version_str[1] << 8);
4536
4537         /*
4538          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4539          * X32 or newer, all Z series;  Some models must have an
4540          * up-to-date BIOS or they will not be detected.
4541          *
4542          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4543          */
4544         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4545                 if (sscanf(dev->name,
4546                            "IBM ThinkPad Embedded Controller -[%17c",
4547                            ec_fw_string) == 1) {
4548                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4549                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4550
4551                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4552                         tp->ec_model = ec_fw_string[0]
4553                                         | (ec_fw_string[1] << 8);
4554                         break;
4555                 }
4556         }
4557
4558         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4559                                         GFP_KERNEL);
4560         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4561                 kfree(tp->model_str);
4562                 tp->model_str = NULL;
4563         }
4564 }
4565
4566 static int __init probe_for_thinkpad(void)
4567 {
4568         int is_thinkpad;
4569
4570         if (acpi_disabled)
4571                 return -ENODEV;
4572
4573         /*
4574          * Non-ancient models have better DMI tagging, but very old models
4575          * don't.
4576          */
4577         is_thinkpad = (thinkpad_id.model_str != NULL);
4578
4579         /* ec is required because many other handles are relative to it */
4580         IBM_ACPIHANDLE_INIT(ec);
4581         if (!ec_handle) {
4582                 if (is_thinkpad)
4583                         printk(IBM_ERR
4584                                 "Not yet supported ThinkPad detected!\n");
4585                 return -ENODEV;
4586         }
4587
4588         /*
4589          * Risks a regression on very old machines, but reduces potential
4590          * false positives a damn great deal
4591          */
4592         if (!is_thinkpad)
4593                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4594
4595         if (!is_thinkpad && !force_load)
4596                 return -ENODEV;
4597
4598         return 0;
4599 }
4600
4601
4602 /* Module init, exit, parameters */
4603
4604 static struct ibm_init_struct ibms_init[] __initdata = {
4605         {
4606                 .init = thinkpad_acpi_driver_init,
4607                 .data = &thinkpad_acpi_driver_data,
4608         },
4609         {
4610                 .init = hotkey_init,
4611                 .data = &hotkey_driver_data,
4612         },
4613         {
4614                 .init = bluetooth_init,
4615                 .data = &bluetooth_driver_data,
4616         },
4617         {
4618                 .init = wan_init,
4619                 .data = &wan_driver_data,
4620         },
4621         {
4622                 .init = video_init,
4623                 .data = &video_driver_data,
4624         },
4625         {
4626                 .init = light_init,
4627                 .data = &light_driver_data,
4628         },
4629 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4630         {
4631                 .init = dock_init,
4632                 .data = &dock_driver_data[0],
4633         },
4634         {
4635                 .init = dock_init2,
4636                 .data = &dock_driver_data[1],
4637         },
4638 #endif
4639 #ifdef CONFIG_THINKPAD_ACPI_BAY
4640         {
4641                 .init = bay_init,
4642                 .data = &bay_driver_data,
4643         },
4644 #endif
4645         {
4646                 .init = cmos_init,
4647                 .data = &cmos_driver_data,
4648         },
4649         {
4650                 .init = led_init,
4651                 .data = &led_driver_data,
4652         },
4653         {
4654                 .init = beep_init,
4655                 .data = &beep_driver_data,
4656         },
4657         {
4658                 .init = thermal_init,
4659                 .data = &thermal_driver_data,
4660         },
4661         {
4662                 .data = &ecdump_driver_data,
4663         },
4664         {
4665                 .init = brightness_init,
4666                 .data = &brightness_driver_data,
4667         },
4668         {
4669                 .data = &volume_driver_data,
4670         },
4671         {
4672                 .init = fan_init,
4673                 .data = &fan_driver_data,
4674         },
4675 };
4676
4677 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4678 {
4679         unsigned int i;
4680         struct ibm_struct *ibm;
4681
4682         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4683                 ibm = ibms_init[i].data;
4684                 BUG_ON(ibm == NULL);
4685
4686                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4687                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4688                                 return -ENOSPC;
4689                         strcpy(ibms_init[i].param, val);
4690                         strcat(ibms_init[i].param, ",");
4691                         return 0;
4692                 }
4693         }
4694
4695         return -EINVAL;
4696 }
4697
4698 static int experimental;
4699 module_param(experimental, int, 0);
4700
4701 static u32 dbg_level;
4702 module_param_named(debug, dbg_level, uint, 0);
4703
4704 static int force_load;
4705 module_param(force_load, bool, 0);
4706
4707 static int fan_control_allowed;
4708 module_param_named(fan_control, fan_control_allowed, bool, 0);
4709
4710 static int brightness_mode;
4711 module_param_named(brightness_mode, brightness_mode, int, 0);
4712
4713 static unsigned int hotkey_report_mode;
4714 module_param(hotkey_report_mode, uint, 0);
4715
4716 #define IBM_PARAM(feature) \
4717         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4718
4719 IBM_PARAM(hotkey);
4720 IBM_PARAM(bluetooth);
4721 IBM_PARAM(video);
4722 IBM_PARAM(light);
4723 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4724 IBM_PARAM(dock);
4725 #endif
4726 #ifdef CONFIG_THINKPAD_ACPI_BAY
4727 IBM_PARAM(bay);
4728 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4729 IBM_PARAM(cmos);
4730 IBM_PARAM(led);
4731 IBM_PARAM(beep);
4732 IBM_PARAM(ecdump);
4733 IBM_PARAM(brightness);
4734 IBM_PARAM(volume);
4735 IBM_PARAM(fan);
4736
4737 static int __init thinkpad_acpi_module_init(void)
4738 {
4739         int ret, i;
4740
4741         tpacpi_lifecycle = TPACPI_LIFE_INIT;
4742
4743         /* Parameter checking */
4744         if (hotkey_report_mode > 2)
4745                 return -EINVAL;
4746
4747         /* Driver-level probe */
4748
4749         get_thinkpad_model_data(&thinkpad_id);
4750         ret = probe_for_thinkpad();
4751         if (ret) {
4752                 thinkpad_acpi_module_exit();
4753                 return ret;
4754         }
4755
4756         /* Driver initialization */
4757
4758         IBM_ACPIHANDLE_INIT(ecrd);
4759         IBM_ACPIHANDLE_INIT(ecwr);
4760
4761         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4762         if (!proc_dir) {
4763                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4764                 thinkpad_acpi_module_exit();
4765                 return -ENODEV;
4766         }
4767         proc_dir->owner = THIS_MODULE;
4768
4769         ret = platform_driver_register(&tpacpi_pdriver);
4770         if (ret) {
4771                 printk(IBM_ERR "unable to register platform driver\n");
4772                 thinkpad_acpi_module_exit();
4773                 return ret;
4774         }
4775         tp_features.platform_drv_registered = 1;
4776
4777         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4778         if (ret) {
4779                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4780                 thinkpad_acpi_module_exit();
4781                 return ret;
4782         }
4783         tp_features.platform_drv_attrs_registered = 1;
4784
4785
4786         /* Device initialization */
4787         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4788                                                         NULL, 0);
4789         if (IS_ERR(tpacpi_pdev)) {
4790                 ret = PTR_ERR(tpacpi_pdev);
4791                 tpacpi_pdev = NULL;
4792                 printk(IBM_ERR "unable to register platform device\n");
4793                 thinkpad_acpi_module_exit();
4794                 return ret;
4795         }
4796         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4797         if (IS_ERR(tpacpi_hwmon)) {
4798                 ret = PTR_ERR(tpacpi_hwmon);
4799                 tpacpi_hwmon = NULL;
4800                 printk(IBM_ERR "unable to register hwmon device\n");
4801                 thinkpad_acpi_module_exit();
4802                 return ret;
4803         }
4804         mutex_init(&tpacpi_inputdev_send_mutex);
4805         tpacpi_inputdev = input_allocate_device();
4806         if (!tpacpi_inputdev) {
4807                 printk(IBM_ERR "unable to allocate input device\n");
4808                 thinkpad_acpi_module_exit();
4809                 return -ENOMEM;
4810         } else {
4811                 /* Prepare input device, but don't register */
4812                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4813                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4814                 tpacpi_inputdev->id.bustype = BUS_HOST;
4815                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
4816                                                 thinkpad_id.vendor :
4817                                                 PCI_VENDOR_ID_IBM;
4818                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4819                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4820         }
4821         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4822                 ret = ibm_init(&ibms_init[i]);
4823                 if (ret >= 0 && *ibms_init[i].param)
4824                         ret = ibms_init[i].data->write(ibms_init[i].param);
4825                 if (ret < 0) {
4826                         thinkpad_acpi_module_exit();
4827                         return ret;
4828                 }
4829         }
4830         ret = input_register_device(tpacpi_inputdev);
4831         if (ret < 0) {
4832                 printk(IBM_ERR "unable to register input device\n");
4833                 thinkpad_acpi_module_exit();
4834                 return ret;
4835         } else {
4836                 tp_features.input_device_registered = 1;
4837         }
4838
4839         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
4840         return 0;
4841 }
4842
4843 static void thinkpad_acpi_module_exit(void)
4844 {
4845         struct ibm_struct *ibm, *itmp;
4846
4847         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
4848
4849         list_for_each_entry_safe_reverse(ibm, itmp,
4850                                          &tpacpi_all_drivers,
4851                                          all_drivers) {
4852                 ibm_exit(ibm);
4853         }
4854
4855         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4856
4857         if (tpacpi_inputdev) {
4858                 if (tp_features.input_device_registered)
4859                         input_unregister_device(tpacpi_inputdev);
4860                 else
4861                         input_free_device(tpacpi_inputdev);
4862         }
4863
4864         if (tpacpi_hwmon)
4865                 hwmon_device_unregister(tpacpi_hwmon);
4866
4867         if (tpacpi_pdev)
4868                 platform_device_unregister(tpacpi_pdev);
4869
4870         if (tp_features.platform_drv_attrs_registered)
4871                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4872
4873         if (tp_features.platform_drv_registered)
4874                 platform_driver_unregister(&tpacpi_pdriver);
4875
4876         if (proc_dir)
4877                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4878
4879         kfree(thinkpad_id.bios_version_str);
4880         kfree(thinkpad_id.ec_version_str);
4881         kfree(thinkpad_id.model_str);
4882 }
4883
4884 module_init(thinkpad_acpi_module_init);
4885 module_exit(thinkpad_acpi_module_exit);