drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.17"
  25 #define TPACPI_SYSFS_VERSION 0x020000
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 #include "thinkpad_acpi.h"
  86
  87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  88 MODULE_DESCRIPTION(IBM_DESC);
  89 MODULE_VERSION(IBM_VERSION);
  90 MODULE_LICENSE("GPL");
  91
  92 /* Please remove this in year 2009 */
  93 MODULE_ALIAS("ibm_acpi");
  94
  95 /*
  96  * DMI matching for module autoloading
  97  *
  98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
  99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 100  *
 101  * Only models listed in thinkwiki will be supported, so add yours
 102  * if it is not there yet.
 103  */
 104 #define IBM_BIOS_MODULE_ALIAS(__type) \
 105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 106
 107 /* Non-ancient thinkpads */
 108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 110
 111 /* Ancient thinkpad BIOSes have to be identified by
 112  * BIOS type or model number, and there are far less
 113  * BIOS types than model numbers... */
 114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 static enum {
 121         TPACPI_LIFE_INIT = 0,
 122         TPACPI_LIFE_RUNNING,
 123         TPACPI_LIFE_EXITING,
 124 } tpacpi_lifecycle;
 125
 126 /****************************************************************************
 127  ****************************************************************************
 128  *
 129  * ACPI Helpers and device model
 130  *
 131  ****************************************************************************
 132  ****************************************************************************/
 133
 134 /*************************************************************************
 135  * ACPI basic handles
 136  */
 137
 138 static acpi_handle root_handle;
 139
 140 #define IBM_HANDLE(object, parent, paths...)                    \
 141         static acpi_handle  object##_handle;                    \
 142         static acpi_handle *object##_parent = &parent##_handle; \
 143         static char        *object##_path;                      \
 144         static char        *object##_paths[] = { paths }
 145
 146 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 147            "\\_SB.PCI.ISA.EC",  /* 570 */
 148            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 149            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 150            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 151            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 152            "\\_SB.PCI0.LPC.EC", /* all others */
 153            );
 154
 155 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 156 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 157
 158
 159 /*************************************************************************
 160  * Misc ACPI handles
 161  */
 162
 163 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 164            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 165            "\\CMS",             /* R40, R40e */
 166            );                   /* all others */
 167
 168 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 169            "^HKEY",             /* R30, R31 */
 170            "HKEY",              /* all others */
 171            );                   /* 570 */
 172
 173
 174 /*************************************************************************
 175  * ACPI helpers
 176  */
 177
 178 static int acpi_evalf(acpi_handle handle,
 179                       void *res, char *method, char *fmt, ...)
 180 {
 181         char *fmt0 = fmt;
 182         struct acpi_object_list params;
 183         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 184         struct acpi_buffer result, *resultp;
 185         union acpi_object out_obj;
 186         acpi_status status;
 187         va_list ap;
 188         char res_type;
 189         int success;
 190         int quiet;
 191
 192         if (!*fmt) {
 193                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 194                 return 0;
 195         }
 196
 197         if (*fmt == 'q') {
 198                 quiet = 1;
 199                 fmt++;
 200         } else
 201                 quiet = 0;
 202
 203         res_type = *(fmt++);
 204
 205         params.count = 0;
 206         params.pointer = &in_objs[0];
 207
 208         va_start(ap, fmt);
 209         while (*fmt) {
 210                 char c = *(fmt++);
 211                 switch (c) {
 212                 case 'd':       /* int */
 213                         in_objs[params.count].integer.value = va_arg(ap, int);
 214                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 215                         break;
 216                         /* add more types as needed */
 217                 default:
 218                         printk(IBM_ERR "acpi_evalf() called "
 219                                "with invalid format character '%c'\n", c);
 220                         return 0;
 221                 }
 222         }
 223         va_end(ap);
 224
 225         if (res_type != 'v') {
 226                 result.length = sizeof(out_obj);
 227                 result.pointer = &out_obj;
 228                 resultp = &result;
 229         } else
 230                 resultp = NULL;
 231
 232         status = acpi_evaluate_object(handle, method, &params, resultp);
 233
 234         switch (res_type) {
 235         case 'd':               /* int */
 236                 if (res)
 237                         *(int *)res = out_obj.integer.value;
 238                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 239                 break;
 240         case 'v':               /* void */
 241                 success = status == AE_OK;
 242                 break;
 243                 /* add more types as needed */
 244         default:
 245                 printk(IBM_ERR "acpi_evalf() called "
 246                        "with invalid format character '%c'\n", res_type);
 247                 return 0;
 248         }
 249
 250         if (!success && !quiet)
 251                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 252                        method, fmt0, status);
 253
 254         return success;
 255 }
 256
 257 static void __unused acpi_print_int(acpi_handle handle, char *method)
 258 {
 259         int i;
 260
 261         if (acpi_evalf(handle, &i, method, "d"))
 262                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 263         else
 264                 printk(IBM_ERR "error calling %s\n", method);
 265 }
 266
 267 static int acpi_ec_read(int i, u8 * p)
 268 {
 269         int v;
 270
 271         if (ecrd_handle) {
 272                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 273                         return 0;
 274                 *p = v;
 275         } else {
 276                 if (ec_read(i, p) < 0)
 277                         return 0;
 278         }
 279
 280         return 1;
 281 }
 282
 283 static int acpi_ec_write(int i, u8 v)
 284 {
 285         if (ecwr_handle) {
 286                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 287                         return 0;
 288         } else {
 289                 if (ec_write(i, v) < 0)
 290                         return 0;
 291         }
 292
 293         return 1;
 294 }
 295
 296 static int _sta(acpi_handle handle)
 297 {
 298         int status;
 299
 300         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 301                 status = 0;
 302
 303         return status;
 304 }
 305
 306 static int issue_thinkpad_cmos_command(int cmos_cmd)
 307 {
 308         if (!cmos_handle)
 309                 return -ENXIO;
 310
 311         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 312                 return -EIO;
 313
 314         return 0;
 315 }
 316
 317 /*************************************************************************
 318  * ACPI device model
 319  */
 320
 321 static void drv_acpi_handle_init(char *name,
 322                            acpi_handle *handle, acpi_handle parent,
 323                            char **paths, int num_paths, char **path)
 324 {
 325         int i;
 326         acpi_status status;
 327
 328         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 329                 name);
 330
 331         for (i = 0; i < num_paths; i++) {
 332                 status = acpi_get_handle(parent, paths[i], handle);
 333                 if (ACPI_SUCCESS(status)) {
 334                         *path = paths[i];
 335                         dbg_printk(TPACPI_DBG_INIT,
 336                                    "Found ACPI handle %s for %s\n",
 337                                    *path, name);
 338                         return;
 339                 }
 340         }
 341
 342         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 343                     name);
 344         *handle = NULL;
 345 }
 346
 347 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 348 {
 349         struct ibm_struct *ibm = data;
 350
 351         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 352                 return;
 353
 354         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 355                 return;
 356
 357         ibm->acpi->notify(ibm, event);
 358 }
 359
 360 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 361 {
 362         acpi_status status;
 363         int rc;
 364
 365         BUG_ON(!ibm->acpi);
 366
 367         if (!*ibm->acpi->handle)
 368                 return 0;
 369
 370         vdbg_printk(TPACPI_DBG_INIT,
 371                 "setting up ACPI notify for %s\n", ibm->name);
 372
 373         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 374         if (rc < 0) {
 375                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 376                         ibm->name, rc);
 377                 return -ENODEV;
 378         }
 379
 380         acpi_driver_data(ibm->acpi->device) = ibm;
 381         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 382                 IBM_ACPI_EVENT_PREFIX,
 383                 ibm->name);
 384
 385         status = acpi_install_notify_handler(*ibm->acpi->handle,
 386                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 387         if (ACPI_FAILURE(status)) {
 388                 if (status == AE_ALREADY_EXISTS) {
 389                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 390                                 ibm->name);
 391                 } else {
 392                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 393                                 ibm->name, status);
 394                 }
 395                 return -ENODEV;
 396         }
 397         ibm->flags.acpi_notify_installed = 1;
 398         return 0;
 399 }
 400
 401 static int __init tpacpi_device_add(struct acpi_device *device)
 402 {
 403         return 0;
 404 }
 405
 406 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 407 {
 408         int rc;
 409
 410         dbg_printk(TPACPI_DBG_INIT,
 411                 "registering %s as an ACPI driver\n", ibm->name);
 412
 413         BUG_ON(!ibm->acpi);
 414
 415         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 416         if (!ibm->acpi->driver) {
 417                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 418                 return -ENOMEM;
 419         }
 420
 421         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 422         ibm->acpi->driver->ids = ibm->acpi->hid;
 423
 424         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 425
 426         rc = acpi_bus_register_driver(ibm->acpi->driver);
 427         if (rc < 0) {
 428                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 429                        ibm->name, rc);
 430                 kfree(ibm->acpi->driver);
 431                 ibm->acpi->driver = NULL;
 432         } else if (!rc)
 433                 ibm->flags.acpi_driver_registered = 1;
 434
 435         return rc;
 436 }
 437
 438
 439 /****************************************************************************
 440  ****************************************************************************
 441  *
 442  * Procfs Helpers
 443  *
 444  ****************************************************************************
 445  ****************************************************************************/
 446
 447 static int dispatch_procfs_read(char *page, char **start, off_t off,
 448                         int count, int *eof, void *data)
 449 {
 450         struct ibm_struct *ibm = data;
 451         int len;
 452
 453         if (!ibm || !ibm->read)
 454                 return -EINVAL;
 455
 456         len = ibm->read(page);
 457         if (len < 0)
 458                 return len;
 459
 460         if (len <= off + count)
 461                 *eof = 1;
 462         *start = page + off;
 463         len -= off;
 464         if (len > count)
 465                 len = count;
 466         if (len < 0)
 467                 len = 0;
 468
 469         return len;
 470 }
 471
 472 static int dispatch_procfs_write(struct file *file,
 473                         const char __user * userbuf,
 474                         unsigned long count, void *data)
 475 {
 476         struct ibm_struct *ibm = data;
 477         char *kernbuf;
 478         int ret;
 479
 480         if (!ibm || !ibm->write)
 481                 return -EINVAL;
 482
 483         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 484         if (!kernbuf)
 485                 return -ENOMEM;
 486
 487         if (copy_from_user(kernbuf, userbuf, count)) {
 488                 kfree(kernbuf);
 489                 return -EFAULT;
 490         }
 491
 492         kernbuf[count] = 0;
 493         strcat(kernbuf, ",");
 494         ret = ibm->write(kernbuf);
 495         if (ret == 0)
 496                 ret = count;
 497
 498         kfree(kernbuf);
 499
 500         return ret;
 501 }
 502
 503 static char *next_cmd(char **cmds)
 504 {
 505         char *start = *cmds;
 506         char *end;
 507
 508         while ((end = strchr(start, ',')) && end == start)
 509                 start = end + 1;
 510
 511         if (!end)
 512                 return NULL;
 513
 514         *end = 0;
 515         *cmds = end + 1;
 516         return start;
 517 }
 518
 519
 520 /****************************************************************************
 521  ****************************************************************************
 522  *
 523  * Device model: input, hwmon and platform
 524  *
 525  ****************************************************************************
 526  ****************************************************************************/
 527
 528 static struct platform_device *tpacpi_pdev;
 529 static struct platform_device *tpacpi_sensors_pdev;
 530 static struct device *tpacpi_hwmon;
 531 static struct input_dev *tpacpi_inputdev;
 532 static struct mutex tpacpi_inputdev_send_mutex;
 533
 534
 535 static int tpacpi_resume_handler(struct platform_device *pdev)
 536 {
 537         struct ibm_struct *ibm, *itmp;
 538
 539         list_for_each_entry_safe(ibm, itmp,
 540                                  &tpacpi_all_drivers,
 541                                  all_drivers) {
 542                 if (ibm->resume)
 543                         (ibm->resume)();
 544         }
 545
 546         return 0;
 547 }
 548
 549 static struct platform_driver tpacpi_pdriver = {
 550         .driver = {
 551                 .name = IBM_DRVR_NAME,
 552                 .owner = THIS_MODULE,
 553         },
 554         .resume = tpacpi_resume_handler,
 555 };
 556
 557 static struct platform_driver tpacpi_hwmon_pdriver = {
 558         .driver = {
 559                 .name = IBM_HWMON_DRVR_NAME,
 560                 .owner = THIS_MODULE,
 561         },
 562 };
 563
 564 /*************************************************************************
 565  * thinkpad-acpi driver attributes
 566  */
 567
 568 /* interface_version --------------------------------------------------- */
 569 static ssize_t tpacpi_driver_interface_version_show(
 570                                 struct device_driver *drv,
 571                                 char *buf)
 572 {
 573         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 574 }
 575
 576 static DRIVER_ATTR(interface_version, S_IRUGO,
 577                 tpacpi_driver_interface_version_show, NULL);
 578
 579 /* debug_level --------------------------------------------------------- */
 580 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 581                                                 char *buf)
 582 {
 583         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 584 }
 585
 586 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 587                                                 const char *buf, size_t count)
 588 {
 589         unsigned long t;
 590
 591         if (parse_strtoul(buf, 0xffff, &t))
 592                 return -EINVAL;
 593
 594         dbg_level = t;
 595
 596         return count;
 597 }
 598
 599 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 600                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 601
 602 /* version ------------------------------------------------------------- */
 603 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 604                                                 char *buf)
 605 {
 606         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 607 }
 608
 609 static DRIVER_ATTR(version, S_IRUGO,
 610                 tpacpi_driver_version_show, NULL);
 611
 612 /* --------------------------------------------------------------------- */
 613
 614 static struct driver_attribute* tpacpi_driver_attributes[] = {
 615         &driver_attr_debug_level, &driver_attr_version,
 616         &driver_attr_interface_version,
 617 };
 618
 619 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 620 {
 621         int i, res;
 622
 623         i = 0;
 624         res = 0;
 625         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 626                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 627                 i++;
 628         }
 629
 630         return res;
 631 }
 632
 633 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 634 {
 635         int i;
 636
 637         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 638                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 639 }
 640
 641 /*************************************************************************
 642  * sysfs support helpers
 643  */
 644
 645 struct attribute_set_obj {
 646         struct attribute_set s;
 647         struct attribute *a;
 648 } __attribute__((packed));
 649
 650 static struct attribute_set *create_attr_set(unsigned int max_members,
 651                                                 const char* name)
 652 {
 653         struct attribute_set_obj *sobj;
 654
 655         if (max_members == 0)
 656                 return NULL;
 657
 658         /* Allocates space for implicit NULL at the end too */
 659         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 660                     max_members * sizeof(struct attribute *),
 661                     GFP_KERNEL);
 662         if (!sobj)
 663                 return NULL;
 664         sobj->s.max_members = max_members;
 665         sobj->s.group.attrs = &sobj->a;
 666         sobj->s.group.name = name;
 667
 668         return &sobj->s;
 669 }
 670
 671 /* not multi-threaded safe, use it in a single thread per set */
 672 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 673 {
 674         if (!s || !attr)
 675                 return -EINVAL;
 676
 677         if (s->members >= s->max_members)
 678                 return -ENOMEM;
 679
 680         s->group.attrs[s->members] = attr;
 681         s->members++;
 682
 683         return 0;
 684 }
 685
 686 static int add_many_to_attr_set(struct attribute_set* s,
 687                         struct attribute **attr,
 688                         unsigned int count)
 689 {
 690         int i, res;
 691
 692         for (i = 0; i < count; i++) {
 693                 res = add_to_attr_set(s, attr[i]);
 694                 if (res)
 695                         return res;
 696         }
 697
 698         return 0;
 699 }
 700
 701 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 702 {
 703         sysfs_remove_group(kobj, &s->group);
 704         destroy_attr_set(s);
 705 }
 706
 707 static int parse_strtoul(const char *buf,
 708                 unsigned long max, unsigned long *value)
 709 {
 710         char *endp;
 711
 712         while (*buf && isspace(*buf))
 713                 buf++;
 714         *value = simple_strtoul(buf, &endp, 0);
 715         while (*endp && isspace(*endp))
 716                 endp++;
 717         if (*endp || *value > max)
 718                 return -EINVAL;
 719
 720         return 0;
 721 }
 722
 723 /****************************************************************************
 724  ****************************************************************************
 725  *
 726  * Subdrivers
 727  *
 728  ****************************************************************************
 729  ****************************************************************************/
 730
 731 /*************************************************************************
 732  * thinkpad-acpi init subdriver
 733  */
 734
 735 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 736 {
 737         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 738         printk(IBM_INFO "%s\n", IBM_URL);
 739
 740         printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
 741                 (thinkpad_id.bios_version_str) ?
 742                         thinkpad_id.bios_version_str : "unknown",
 743                 (thinkpad_id.ec_version_str) ?
 744                         thinkpad_id.ec_version_str : "unknown");
 745
 746         if (thinkpad_id.vendor && thinkpad_id.model_str)
 747                 printk(IBM_INFO "%s %s\n",
 748                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 749                                 "IBM" : ((thinkpad_id.vendor ==
 750                                                 PCI_VENDOR_ID_LENOVO) ?
 751                                         "Lenovo" : "Unknown vendor"),
 752                         thinkpad_id.model_str);
 753
 754         return 0;
 755 }
 756
 757 static int thinkpad_acpi_driver_read(char *p)
 758 {
 759         int len = 0;
 760
 761         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 762         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 763
 764         return len;
 765 }
 766
 767 static struct ibm_struct thinkpad_acpi_driver_data = {
 768         .name = "driver",
 769         .read = thinkpad_acpi_driver_read,
 770 };
 771
 772 /*************************************************************************
 773  * Hotkey subdriver
 774  */
 775
 776 static int hotkey_orig_status;
 777 static u32 hotkey_orig_mask;
 778 static u32 hotkey_all_mask;
 779 static u32 hotkey_reserved_mask;
 780 static u32 hotkey_mask;
 781
 782 static u16 *hotkey_keycode_map;
 783
 784 static struct attribute_set *hotkey_dev_attributes;
 785
 786 static int hotkey_get_wlsw(int *status)
 787 {
 788         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 789                 return -EIO;
 790         return 0;
 791 }
 792
 793 /*
 794  * Call with hotkey_mutex held
 795  */
 796 static int hotkey_mask_get(void)
 797 {
 798         if (tp_features.hotkey_mask) {
 799                 if (!acpi_evalf(hkey_handle, &hotkey_mask, "DHKN", "d"))
 800                         return -EIO;
 801         }
 802
 803         return 0;
 804 }
 805
 806 /*
 807  * Call with hotkey_mutex held
 808  */
 809 static int hotkey_mask_set(u32 mask)
 810 {
 811         int i;
 812         int rc = 0;
 813
 814         if (tp_features.hotkey_mask) {
 815                 for (i = 0; i < 32; i++) {
 816                         u32 m = 1 << i;
 817                         if (!acpi_evalf(hkey_handle,
 818                                         NULL, "MHKM", "vdd", i + 1,
 819                                         !!(mask & m))) {
 820                                 rc = -EIO;
 821                                 break;
 822                         } else {
 823                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
 824                         }
 825                 }
 826
 827                 /* hotkey_mask_get must be called unconditionally below */
 828                 if (!hotkey_mask_get() && !rc && hotkey_mask != mask) {
 829                         printk(IBM_NOTICE
 830                                "requested hot key mask 0x%08x, but "
 831                                "firmware forced it to 0x%08x\n",
 832                                mask, hotkey_mask);
 833                 }
 834         }
 835
 836         return rc;
 837 }
 838
 839 static int hotkey_status_get(int *status)
 840 {
 841         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 842                 return -EIO;
 843
 844         return 0;
 845 }
 846
 847 static int hotkey_status_set(int status)
 848 {
 849         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 850                 return -EIO;
 851
 852         return 0;
 853 }
 854
 855 static void tpacpi_input_send_radiosw(void)
 856 {
 857         int wlsw;
 858
 859         mutex_lock(&tpacpi_inputdev_send_mutex);
 860
 861         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
 862                 input_report_switch(tpacpi_inputdev,
 863                                     SW_RADIO, !!wlsw);
 864                 input_sync(tpacpi_inputdev);
 865         }
 866
 867         mutex_unlock(&tpacpi_inputdev_send_mutex);
 868 }
 869
 870 static void tpacpi_input_send_key(unsigned int scancode)
 871 {
 872         unsigned int keycode;
 873
 874         keycode = hotkey_keycode_map[scancode];
 875
 876         if (keycode != KEY_RESERVED) {
 877                 mutex_lock(&tpacpi_inputdev_send_mutex);
 878
 879                 input_report_key(tpacpi_inputdev, keycode, 1);
 880                 if (keycode == KEY_UNKNOWN)
 881                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
 882                                     scancode);
 883                 input_sync(tpacpi_inputdev);
 884
 885                 input_report_key(tpacpi_inputdev, keycode, 0);
 886                 if (keycode == KEY_UNKNOWN)
 887                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
 888                                     scancode);
 889                 input_sync(tpacpi_inputdev);
 890
 891                 mutex_unlock(&tpacpi_inputdev_send_mutex);
 892         }
 893 }
 894
 895 /* sysfs hotkey enable ------------------------------------------------- */
 896 static ssize_t hotkey_enable_show(struct device *dev,
 897                            struct device_attribute *attr,
 898                            char *buf)
 899 {
 900         int res, status;
 901
 902         res = hotkey_status_get(&status);
 903         if (res)
 904                 return res;
 905
 906         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 907 }
 908
 909 static ssize_t hotkey_enable_store(struct device *dev,
 910                             struct device_attribute *attr,
 911                             const char *buf, size_t count)
 912 {
 913         unsigned long t;
 914         int res;
 915
 916         if (parse_strtoul(buf, 1, &t))
 917                 return -EINVAL;
 918
 919         res = hotkey_status_set(t);
 920
 921         return (res) ? res : count;
 922 }
 923
 924 static struct device_attribute dev_attr_hotkey_enable =
 925         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 926                 hotkey_enable_show, hotkey_enable_store);
 927
 928 /* sysfs hotkey mask --------------------------------------------------- */
 929 static ssize_t hotkey_mask_show(struct device *dev,
 930                            struct device_attribute *attr,
 931                            char *buf)
 932 {
 933         int res;
 934
 935         if (mutex_lock_interruptible(&hotkey_mutex))
 936                 return -ERESTARTSYS;
 937         res = hotkey_mask_get();
 938         mutex_unlock(&hotkey_mutex);
 939
 940         return (res)?
 941                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
 942 }
 943
 944 static ssize_t hotkey_mask_store(struct device *dev,
 945                             struct device_attribute *attr,
 946                             const char *buf, size_t count)
 947 {
 948         unsigned long t;
 949         int res;
 950
 951         if (parse_strtoul(buf, 0xffffffffUL, &t))
 952                 return -EINVAL;
 953
 954         if (mutex_lock_interruptible(&hotkey_mutex))
 955                 return -ERESTARTSYS;
 956
 957         res = hotkey_mask_set(t);
 958         mutex_unlock(&hotkey_mutex);
 959
 960         return (res) ? res : count;
 961 }
 962
 963 static struct device_attribute dev_attr_hotkey_mask =
 964         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 965                 hotkey_mask_show, hotkey_mask_store);
 966
 967 /* sysfs hotkey bios_enabled ------------------------------------------- */
 968 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 969                            struct device_attribute *attr,
 970                            char *buf)
 971 {
 972         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 973 }
 974
 975 static struct device_attribute dev_attr_hotkey_bios_enabled =
 976         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 977
 978 /* sysfs hotkey bios_mask ---------------------------------------------- */
 979 static ssize_t hotkey_bios_mask_show(struct device *dev,
 980                            struct device_attribute *attr,
 981                            char *buf)
 982 {
 983         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 984 }
 985
 986 static struct device_attribute dev_attr_hotkey_bios_mask =
 987         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 988
 989 /* sysfs hotkey all_mask ----------------------------------------------- */
 990 static ssize_t hotkey_all_mask_show(struct device *dev,
 991                            struct device_attribute *attr,
 992                            char *buf)
 993 {
 994         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 995 }
 996
 997 static struct device_attribute dev_attr_hotkey_all_mask =
 998         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 999
1000 /* sysfs hotkey recommended_mask --------------------------------------- */
1001 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1002                                             struct device_attribute *attr,
1003                                             char *buf)
1004 {
1005         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1006                         hotkey_all_mask & ~hotkey_reserved_mask);
1007 }
1008
1009 static struct device_attribute dev_attr_hotkey_recommended_mask =
1010         __ATTR(hotkey_recommended_mask, S_IRUGO,
1011                 hotkey_recommended_mask_show, NULL);
1012
1013 /* sysfs hotkey radio_sw ----------------------------------------------- */
1014 static ssize_t hotkey_radio_sw_show(struct device *dev,
1015                            struct device_attribute *attr,
1016                            char *buf)
1017 {
1018         int res, s;
1019         res = hotkey_get_wlsw(&s);
1020         if (res < 0)
1021                 return res;
1022
1023         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1024 }
1025
1026 static struct device_attribute dev_attr_hotkey_radio_sw =
1027         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1028
1029 /* sysfs hotkey report_mode -------------------------------------------- */
1030 static ssize_t hotkey_report_mode_show(struct device *dev,
1031                            struct device_attribute *attr,
1032                            char *buf)
1033 {
1034         return snprintf(buf, PAGE_SIZE, "%d\n",
1035                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1036 }
1037
1038 static struct device_attribute dev_attr_hotkey_report_mode =
1039         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1040
1041 /* --------------------------------------------------------------------- */
1042
1043 static struct attribute *hotkey_attributes[] __initdata = {
1044         &dev_attr_hotkey_enable.attr,
1045         &dev_attr_hotkey_report_mode.attr,
1046 };
1047
1048 static struct attribute *hotkey_mask_attributes[] __initdata = {
1049         &dev_attr_hotkey_mask.attr,
1050         &dev_attr_hotkey_bios_enabled.attr,
1051         &dev_attr_hotkey_bios_mask.attr,
1052         &dev_attr_hotkey_all_mask.attr,
1053         &dev_attr_hotkey_recommended_mask.attr,
1054 };
1055
1056 static int __init hotkey_init(struct ibm_init_struct *iibm)
1057 {
1058         /* Requirements for changing the default keymaps:
1059          *
1060          * 1. Many of the keys are mapped to KEY_RESERVED for very
1061          *    good reasons.  Do not change them unless you have deep
1062          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1063          *    the various ThinkPad models.  The driver behaves
1064          *    differently for KEY_RESERVED: such keys have their
1065          *    hot key mask *unset* in mask_recommended, and also
1066          *    in the initial hot key mask programmed into the
1067          *    firmware at driver load time, which means the firm-
1068          *    ware may react very differently if you change them to
1069          *    something else;
1070          *
1071          * 2. You must be subscribed to the linux-thinkpad and
1072          *    ibm-acpi-devel mailing lists, and you should read the
1073          *    list archives since 2007 if you want to change the
1074          *    keymaps.  This requirement exists so that you will
1075          *    know the past history of problems with the thinkpad-
1076          *    acpi driver keymaps, and also that you will be
1077          *    listening to any bug reports;
1078          *
1079          * 3. Do not send thinkpad-acpi specific patches directly to
1080          *    for merging, *ever*.  Send them to the linux-acpi
1081          *    mailinglist for comments.  Merging is to be done only
1082          *    through acpi-test and the ACPI maintainer.
1083          *
1084          * If the above is too much to ask, don't change the keymap.
1085          * Ask the thinkpad-acpi maintainer to do it, instead.
1086          */
1087         static u16 ibm_keycode_map[] __initdata = {
1088                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1089                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1090                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1091                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1092
1093                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1094                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1095                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1096                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1097
1098                 /* brightness: firmware always reacts to them, unless
1099                  * X.org did some tricks in the radeon BIOS scratch
1100                  * registers of *some* models */
1101                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1102                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1103
1104                 /* Thinklight: firmware always react to it */
1105                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1106
1107                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1108                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1109
1110                 /* Volume: firmware always react to it and reprograms
1111                  * the built-in *extra* mixer.  Never map it to control
1112                  * another mixer by default. */
1113                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1114                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1115                 KEY_RESERVED,   /* 0x16: MUTE */
1116
1117                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1118
1119                 /* (assignments unknown, please report if found) */
1120                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1121                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1122         };
1123         static u16 lenovo_keycode_map[] __initdata = {
1124                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1125                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1126                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1127                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1128
1129                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1130                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1131                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1132                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1133
1134                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1135                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1136
1137                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1138
1139                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1140                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1141
1142                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1143                  * react to it and reprograms the built-in *extra* mixer.
1144                  * Never map it to control another mixer by default.
1145                  *
1146                  * T60?, T61, R60?, R61: firmware and EC tries to send
1147                  * these over the regular keyboard, so these are no-ops,
1148                  * but there are still weird bugs re. MUTE, so do not
1149                  * change unless you get test reports from all Lenovo
1150                  * models.  May cause the BIOS to interfere with the
1151                  * HDA mixer.
1152                  */
1153                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1154                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1155                 KEY_RESERVED,   /* 0x16: MUTE */
1156
1157                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1158
1159                 /* (assignments unknown, please report if found) */
1160                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1161                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1162         };
1163
1164 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1165 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1166 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1167
1168         int res, i;
1169         int status;
1170         int hkeyv;
1171
1172         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1173
1174         BUG_ON(!tpacpi_inputdev);
1175
1176         IBM_ACPIHANDLE_INIT(hkey);
1177         mutex_init(&hotkey_mutex);
1178
1179         /* hotkey not supported on 570 */
1180         tp_features.hotkey = hkey_handle != NULL;
1181
1182         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1183                 str_supported(tp_features.hotkey));
1184
1185         if (tp_features.hotkey) {
1186                 hotkey_dev_attributes = create_attr_set(8, NULL);
1187                 if (!hotkey_dev_attributes)
1188                         return -ENOMEM;
1189                 res = add_many_to_attr_set(hotkey_dev_attributes,
1190                                 hotkey_attributes,
1191                                 ARRAY_SIZE(hotkey_attributes));
1192                 if (res)
1193                         return res;
1194
1195                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1196                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1197                    for HKEY interface version 0x100 */
1198                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1199                         if ((hkeyv >> 8) != 1) {
1200                                 printk(IBM_ERR "unknown version of the "
1201                                        "HKEY interface: 0x%x\n", hkeyv);
1202                                 printk(IBM_ERR "please report this to %s\n",
1203                                        IBM_MAIL);
1204                         } else {
1205                                 /*
1206                                  * MHKV 0x100 in A31, R40, R40e,
1207                                  * T4x, X31, and later
1208                                  * */
1209                                 tp_features.hotkey_mask = 1;
1210                         }
1211                 }
1212
1213                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1214                         str_supported(tp_features.hotkey_mask));
1215
1216                 if (tp_features.hotkey_mask) {
1217                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1218                                         "MHKA", "qd")) {
1219                                 printk(IBM_ERR
1220                                        "missing MHKA handler, "
1221                                        "please report this to %s\n",
1222                                        IBM_MAIL);
1223                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
1224                         }
1225                 }
1226
1227                 res = hotkey_status_get(&hotkey_orig_status);
1228                 if (!res && tp_features.hotkey_mask) {
1229                         res = hotkey_mask_get();
1230                         hotkey_orig_mask = hotkey_mask;
1231                         if (!res) {
1232                                 res = add_many_to_attr_set(
1233                                         hotkey_dev_attributes,
1234                                         hotkey_mask_attributes,
1235                                         ARRAY_SIZE(hotkey_mask_attributes));
1236                         }
1237                 }
1238
1239                 /* Not all thinkpads have a hardware radio switch */
1240                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1241                         tp_features.hotkey_wlsw = 1;
1242                         printk(IBM_INFO
1243                                 "radio switch found; radios are %s\n",
1244                                 enabled(status, 0));
1245                         res = add_to_attr_set(hotkey_dev_attributes,
1246                                         &dev_attr_hotkey_radio_sw.attr);
1247                 }
1248
1249                 if (!res)
1250                         res = register_attr_set_with_sysfs(
1251                                         hotkey_dev_attributes,
1252                                         &tpacpi_pdev->dev.kobj);
1253                 if (res)
1254                         return res;
1255
1256                 /* Set up key map */
1257
1258                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1259                                                 GFP_KERNEL);
1260                 if (!hotkey_keycode_map) {
1261                         printk(IBM_ERR "failed to allocate memory for key map\n");
1262                         return -ENOMEM;
1263                 }
1264
1265                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1266                         dbg_printk(TPACPI_DBG_INIT,
1267                                    "using Lenovo default hot key map\n");
1268                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1269                                 TPACPI_HOTKEY_MAP_SIZE);
1270                 } else {
1271                         dbg_printk(TPACPI_DBG_INIT,
1272                                    "using IBM default hot key map\n");
1273                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1274                                 TPACPI_HOTKEY_MAP_SIZE);
1275                 }
1276
1277                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1278                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1279                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1280                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1281                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1282                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1283                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1284                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1285                                 set_bit(hotkey_keycode_map[i],
1286                                         tpacpi_inputdev->keybit);
1287                         } else {
1288                                 if (i < sizeof(hotkey_reserved_mask)*8)
1289                                         hotkey_reserved_mask |= 1 << i;
1290                         }
1291                 }
1292
1293                 if (tp_features.hotkey_wlsw) {
1294                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1295                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1296                 }
1297
1298                 dbg_printk(TPACPI_DBG_INIT,
1299                                 "enabling hot key handling\n");
1300                 res = hotkey_status_set(1);
1301                 if (res)
1302                         return res;
1303                 res = hotkey_mask_set((hotkey_all_mask & ~hotkey_reserved_mask)
1304                                         | hotkey_orig_mask);
1305                 if (res)
1306                         return res;
1307
1308                 dbg_printk(TPACPI_DBG_INIT,
1309                                 "legacy hot key reporting over procfs %s\n",
1310                                 (hotkey_report_mode < 2) ?
1311                                         "enabled" : "disabled");
1312         }
1313
1314         return (tp_features.hotkey)? 0 : 1;
1315 }
1316
1317 static void hotkey_exit(void)
1318 {
1319         if (tp_features.hotkey) {
1320                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hot key mask\n");
1321                 /* no short-circuit boolean operator below! */
1322                 if ((hotkey_mask_set(hotkey_orig_mask) |
1323                      hotkey_status_set(hotkey_orig_status)) != 0)
1324                         printk(IBM_ERR "failed to restore hot key mask to BIOS defaults\n");
1325         }
1326
1327         if (hotkey_dev_attributes) {
1328                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1329                 hotkey_dev_attributes = NULL;
1330         }
1331 }
1332
1333 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
1334 {
1335         u32 hkey;
1336         unsigned int scancode;
1337         int send_acpi_ev;
1338         int ignore_acpi_ev;
1339
1340         if (event != 0x80) {
1341                 printk(IBM_ERR "unknown HKEY notification event %d\n", event);
1342                 /* forward it to userspace, maybe it knows how to handle it */
1343                 acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1344                                                 ibm->acpi->device->dev.bus_id,
1345                                                 event, 0);
1346                 return;
1347         }
1348
1349         while (1) {
1350                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
1351                         printk(IBM_ERR "failed to retrieve HKEY event\n");
1352                         return;
1353                 }
1354
1355                 if (hkey == 0) {
1356                         /* queue empty */
1357                         return;
1358                 }
1359
1360                 send_acpi_ev = 0;
1361                 ignore_acpi_ev = 0;
1362
1363                 switch (hkey >> 12) {
1364                 case 1:
1365                         /* 0x1000-0x1FFF: key presses */
1366                         scancode = hkey & 0xfff;
1367                         if (scancode > 0 && scancode < 0x21) {
1368                                 scancode--;
1369                                 tpacpi_input_send_key(scancode);
1370                         } else {
1371                                 printk(IBM_ERR
1372                                        "hotkey 0x%04x out of range for keyboard map\n",
1373                                        hkey);
1374                                 send_acpi_ev = 1;
1375                         }
1376                         break;
1377                 case 5:
1378                         /* 0x5000-0x5FFF: LID */
1379                         /* we don't handle it through this path, just
1380                          * eat up known LID events */
1381                         if (hkey != 0x5001 && hkey != 0x5002) {
1382                                 printk(IBM_ERR
1383                                        "unknown LID-related HKEY event: 0x%04x\n",
1384                                        hkey);
1385                                 send_acpi_ev = 1;
1386                         } else {
1387                                 ignore_acpi_ev = 1;
1388                         }
1389                         break;
1390                 case 7:
1391                         /* 0x7000-0x7FFF: misc */
1392                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
1393                                 tpacpi_input_send_radiosw();
1394                                 break;
1395                         }
1396                         /* fallthrough to default */
1397                 default:
1398                         /* case 2: dock-related */
1399                         /*      0x2305 - T43 waking up due to bay lever eject while aslept */
1400                         /* case 3: ultra-bay related. maybe bay in dock? */
1401                         /*      0x3003 - T43 after wake up by bay lever eject (0x2305) */
1402                         printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
1403                         send_acpi_ev = 1;
1404                 }
1405
1406                 /* Legacy events */
1407                 if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
1408                         acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
1409                 }
1410
1411                 /* netlink events */
1412                 if (!ignore_acpi_ev && send_acpi_ev) {
1413                         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
1414                                                         ibm->acpi->device->dev.bus_id,
1415                                                         event, hkey);
1416                 }
1417         }
1418 }
1419
1420 static void hotkey_resume(void)
1421 {
1422         if (hotkey_mask_get())
1423                 printk(IBM_ERR "error while trying to read hot key mask from firmware\n");
1424         tpacpi_input_send_radiosw();
1425 }
1426
1427 /* procfs -------------------------------------------------------------- */
1428 static int hotkey_read(char *p)
1429 {
1430         int res, status;
1431         int len = 0;
1432
1433         if (!tp_features.hotkey) {
1434                 len += sprintf(p + len, "status:\t\tnot supported\n");
1435                 return len;
1436         }
1437
1438         if (mutex_lock_interruptible(&hotkey_mutex))
1439                 return -ERESTARTSYS;
1440         res = hotkey_status_get(&status);
1441         if (!res)
1442                 res = hotkey_mask_get();
1443         mutex_unlock(&hotkey_mutex);
1444         if (res)
1445                 return res;
1446
1447         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1448         if (tp_features.hotkey_mask) {
1449                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
1450                 len += sprintf(p + len,
1451                                "commands:\tenable, disable, reset, <mask>\n");
1452         } else {
1453                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1454                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1455         }
1456
1457         return len;
1458 }
1459
1460 static int hotkey_write(char *buf)
1461 {
1462         int res, status;
1463         u32 mask;
1464         char *cmd;
1465
1466         if (!tp_features.hotkey)
1467                 return -ENODEV;
1468
1469         if (mutex_lock_interruptible(&hotkey_mutex))
1470                 return -ERESTARTSYS;
1471
1472         status = -1;
1473         mask = hotkey_mask;
1474
1475         res = 0;
1476         while ((cmd = next_cmd(&buf))) {
1477                 if (strlencmp(cmd, "enable") == 0) {
1478                         status = 1;
1479                 } else if (strlencmp(cmd, "disable") == 0) {
1480                         status = 0;
1481                 } else if (strlencmp(cmd, "reset") == 0) {
1482                         status = hotkey_orig_status;
1483                         mask = hotkey_orig_mask;
1484                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1485                         /* mask set */
1486                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1487                         /* mask set */
1488                 } else {
1489                         res = -EINVAL;
1490                         goto errexit;
1491                 }
1492         }
1493         if (status != -1)
1494                 res = hotkey_status_set(status);
1495
1496         if (!res && mask != hotkey_mask)
1497                 res = hotkey_mask_set(mask);
1498
1499 errexit:
1500         mutex_unlock(&hotkey_mutex);
1501         return res;
1502 }
1503
1504 static const struct acpi_device_id ibm_htk_device_ids[] = {
1505         {IBM_HKEY_HID, 0},
1506         {"", 0},
1507 };
1508
1509 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1510         .hid = ibm_htk_device_ids,
1511         .notify = hotkey_notify,
1512         .handle = &hkey_handle,
1513         .type = ACPI_DEVICE_NOTIFY,
1514 };
1515
1516 static struct ibm_struct hotkey_driver_data = {
1517         .name = "hotkey",
1518         .read = hotkey_read,
1519         .write = hotkey_write,
1520         .exit = hotkey_exit,
1521         .resume = hotkey_resume,
1522         .acpi = &ibm_hotkey_acpidriver,
1523 };
1524
1525 /*************************************************************************
1526  * Bluetooth subdriver
1527  */
1528
1529 /* sysfs bluetooth enable ---------------------------------------------- */
1530 static ssize_t bluetooth_enable_show(struct device *dev,
1531                            struct device_attribute *attr,
1532                            char *buf)
1533 {
1534         int status;
1535
1536         status = bluetooth_get_radiosw();
1537         if (status < 0)
1538                 return status;
1539
1540         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1541 }
1542
1543 static ssize_t bluetooth_enable_store(struct device *dev,
1544                             struct device_attribute *attr,
1545                             const char *buf, size_t count)
1546 {
1547         unsigned long t;
1548         int res;
1549
1550         if (parse_strtoul(buf, 1, &t))
1551                 return -EINVAL;
1552
1553         res = bluetooth_set_radiosw(t);
1554
1555         return (res) ? res : count;
1556 }
1557
1558 static struct device_attribute dev_attr_bluetooth_enable =
1559         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1560                 bluetooth_enable_show, bluetooth_enable_store);
1561
1562 /* --------------------------------------------------------------------- */
1563
1564 static struct attribute *bluetooth_attributes[] = {
1565         &dev_attr_bluetooth_enable.attr,
1566         NULL
1567 };
1568
1569 static const struct attribute_group bluetooth_attr_group = {
1570         .attrs = bluetooth_attributes,
1571 };
1572
1573 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1574 {
1575         int res;
1576         int status = 0;
1577
1578         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1579
1580         IBM_ACPIHANDLE_INIT(hkey);
1581
1582         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1583            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1584         tp_features.bluetooth = hkey_handle &&
1585             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1586
1587         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1588                 str_supported(tp_features.bluetooth),
1589                 status);
1590
1591         if (tp_features.bluetooth) {
1592                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1593                         /* no bluetooth hardware present in system */
1594                         tp_features.bluetooth = 0;
1595                         dbg_printk(TPACPI_DBG_INIT,
1596                                    "bluetooth hardware not installed\n");
1597                 } else {
1598                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1599                                         &bluetooth_attr_group);
1600                         if (res)
1601                                 return res;
1602                 }
1603         }
1604
1605         return (tp_features.bluetooth)? 0 : 1;
1606 }
1607
1608 static void bluetooth_exit(void)
1609 {
1610         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1611                         &bluetooth_attr_group);
1612 }
1613
1614 static int bluetooth_get_radiosw(void)
1615 {
1616         int status;
1617
1618         if (!tp_features.bluetooth)
1619                 return -ENODEV;
1620
1621         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1622                 return -EIO;
1623
1624         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1625 }
1626
1627 static int bluetooth_set_radiosw(int radio_on)
1628 {
1629         int status;
1630
1631         if (!tp_features.bluetooth)
1632                 return -ENODEV;
1633
1634         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1635                 return -EIO;
1636         if (radio_on)
1637                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1638         else
1639                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1640         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1641                 return -EIO;
1642
1643         return 0;
1644 }
1645
1646 /* procfs -------------------------------------------------------------- */
1647 static int bluetooth_read(char *p)
1648 {
1649         int len = 0;
1650         int status = bluetooth_get_radiosw();
1651
1652         if (!tp_features.bluetooth)
1653                 len += sprintf(p + len, "status:\t\tnot supported\n");
1654         else {
1655                 len += sprintf(p + len, "status:\t\t%s\n",
1656                                 (status)? "enabled" : "disabled");
1657                 len += sprintf(p + len, "commands:\tenable, disable\n");
1658         }
1659
1660         return len;
1661 }
1662
1663 static int bluetooth_write(char *buf)
1664 {
1665         char *cmd;
1666
1667         if (!tp_features.bluetooth)
1668                 return -ENODEV;
1669
1670         while ((cmd = next_cmd(&buf))) {
1671                 if (strlencmp(cmd, "enable") == 0) {
1672                         bluetooth_set_radiosw(1);
1673                 } else if (strlencmp(cmd, "disable") == 0) {
1674                         bluetooth_set_radiosw(0);
1675                 } else
1676                         return -EINVAL;
1677         }
1678
1679         return 0;
1680 }
1681
1682 static struct ibm_struct bluetooth_driver_data = {
1683         .name = "bluetooth",
1684         .read = bluetooth_read,
1685         .write = bluetooth_write,
1686         .exit = bluetooth_exit,
1687 };
1688
1689 /*************************************************************************
1690  * Wan subdriver
1691  */
1692
1693 /* sysfs wan enable ---------------------------------------------------- */
1694 static ssize_t wan_enable_show(struct device *dev,
1695                            struct device_attribute *attr,
1696                            char *buf)
1697 {
1698         int status;
1699
1700         status = wan_get_radiosw();
1701         if (status < 0)
1702                 return status;
1703
1704         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1705 }
1706
1707 static ssize_t wan_enable_store(struct device *dev,
1708                             struct device_attribute *attr,
1709                             const char *buf, size_t count)
1710 {
1711         unsigned long t;
1712         int res;
1713
1714         if (parse_strtoul(buf, 1, &t))
1715                 return -EINVAL;
1716
1717         res = wan_set_radiosw(t);
1718
1719         return (res) ? res : count;
1720 }
1721
1722 static struct device_attribute dev_attr_wan_enable =
1723         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1724                 wan_enable_show, wan_enable_store);
1725
1726 /* --------------------------------------------------------------------- */
1727
1728 static struct attribute *wan_attributes[] = {
1729         &dev_attr_wan_enable.attr,
1730         NULL
1731 };
1732
1733 static const struct attribute_group wan_attr_group = {
1734         .attrs = wan_attributes,
1735 };
1736
1737 static int __init wan_init(struct ibm_init_struct *iibm)
1738 {
1739         int res;
1740         int status = 0;
1741
1742         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1743
1744         IBM_ACPIHANDLE_INIT(hkey);
1745
1746         tp_features.wan = hkey_handle &&
1747             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1748
1749         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1750                 str_supported(tp_features.wan),
1751                 status);
1752
1753         if (tp_features.wan) {
1754                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1755                         /* no wan hardware present in system */
1756                         tp_features.wan = 0;
1757                         dbg_printk(TPACPI_DBG_INIT,
1758                                    "wan hardware not installed\n");
1759                 } else {
1760                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1761                                         &wan_attr_group);
1762                         if (res)
1763                                 return res;
1764                 }
1765         }
1766
1767         return (tp_features.wan)? 0 : 1;
1768 }
1769
1770 static void wan_exit(void)
1771 {
1772         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1773                 &wan_attr_group);
1774 }
1775
1776 static int wan_get_radiosw(void)
1777 {
1778         int status;
1779
1780         if (!tp_features.wan)
1781                 return -ENODEV;
1782
1783         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1784                 return -EIO;
1785
1786         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1787 }
1788
1789 static int wan_set_radiosw(int radio_on)
1790 {
1791         int status;
1792
1793         if (!tp_features.wan)
1794                 return -ENODEV;
1795
1796         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1797                 return -EIO;
1798         if (radio_on)
1799                 status |= TP_ACPI_WANCARD_RADIOSSW;
1800         else
1801                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1802         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1803                 return -EIO;
1804
1805         return 0;
1806 }
1807
1808 /* procfs -------------------------------------------------------------- */
1809 static int wan_read(char *p)
1810 {
1811         int len = 0;
1812         int status = wan_get_radiosw();
1813
1814         if (!tp_features.wan)
1815                 len += sprintf(p + len, "status:\t\tnot supported\n");
1816         else {
1817                 len += sprintf(p + len, "status:\t\t%s\n",
1818                                 (status)? "enabled" : "disabled");
1819                 len += sprintf(p + len, "commands:\tenable, disable\n");
1820         }
1821
1822         return len;
1823 }
1824
1825 static int wan_write(char *buf)
1826 {
1827         char *cmd;
1828
1829         if (!tp_features.wan)
1830                 return -ENODEV;
1831
1832         while ((cmd = next_cmd(&buf))) {
1833                 if (strlencmp(cmd, "enable") == 0) {
1834                         wan_set_radiosw(1);
1835                 } else if (strlencmp(cmd, "disable") == 0) {
1836                         wan_set_radiosw(0);
1837                 } else
1838                         return -EINVAL;
1839         }
1840
1841         return 0;
1842 }
1843
1844 static struct ibm_struct wan_driver_data = {
1845         .name = "wan",
1846         .read = wan_read,
1847         .write = wan_write,
1848         .exit = wan_exit,
1849         .flags.experimental = 1,
1850 };
1851
1852 /*************************************************************************
1853  * Video subdriver
1854  */
1855
1856 static enum video_access_mode video_supported;
1857 static int video_orig_autosw;
1858
1859 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1860            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1861            "\\_SB.PCI0.VID0",   /* 770e */
1862            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1863            "\\_SB.PCI0.AGP.VID",        /* all others */
1864            );                           /* R30, R31 */
1865
1866 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1867
1868 static int __init video_init(struct ibm_init_struct *iibm)
1869 {
1870         int ivga;
1871
1872         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1873
1874         IBM_ACPIHANDLE_INIT(vid);
1875         IBM_ACPIHANDLE_INIT(vid2);
1876
1877         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1878                 /* G41, assume IVGA doesn't change */
1879                 vid_handle = vid2_handle;
1880
1881         if (!vid_handle)
1882                 /* video switching not supported on R30, R31 */
1883                 video_supported = TPACPI_VIDEO_NONE;
1884         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1885                 /* 570 */
1886                 video_supported = TPACPI_VIDEO_570;
1887         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1888                 /* 600e/x, 770e, 770x */
1889                 video_supported = TPACPI_VIDEO_770;
1890         else
1891                 /* all others */
1892                 video_supported = TPACPI_VIDEO_NEW;
1893
1894         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1895                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1896                 video_supported);
1897
1898         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1899 }
1900
1901 static void video_exit(void)
1902 {
1903         dbg_printk(TPACPI_DBG_EXIT,
1904                    "restoring original video autoswitch mode\n");
1905         if (video_autosw_set(video_orig_autosw))
1906                 printk(IBM_ERR "error while trying to restore original "
1907                         "video autoswitch mode\n");
1908 }
1909
1910 static int video_outputsw_get(void)
1911 {
1912         int status = 0;
1913         int i;
1914
1915         switch (video_supported) {
1916         case TPACPI_VIDEO_570:
1917                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1918                                  TP_ACPI_VIDEO_570_PHSCMD))
1919                         return -EIO;
1920                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1921                 break;
1922         case TPACPI_VIDEO_770:
1923                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1924                         return -EIO;
1925                 if (i)
1926                         status |= TP_ACPI_VIDEO_S_LCD;
1927                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1928                         return -EIO;
1929                 if (i)
1930                         status |= TP_ACPI_VIDEO_S_CRT;
1931                 break;
1932         case TPACPI_VIDEO_NEW:
1933                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1934                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1935                         return -EIO;
1936                 if (i)
1937                         status |= TP_ACPI_VIDEO_S_CRT;
1938
1939                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1940                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1941                         return -EIO;
1942                 if (i)
1943                         status |= TP_ACPI_VIDEO_S_LCD;
1944                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1945                         return -EIO;
1946                 if (i)
1947                         status |= TP_ACPI_VIDEO_S_DVI;
1948                 break;
1949         default:
1950                 return -ENOSYS;
1951         }
1952
1953         return status;
1954 }
1955
1956 static int video_outputsw_set(int status)
1957 {
1958         int autosw;
1959         int res = 0;
1960
1961         switch (video_supported) {
1962         case TPACPI_VIDEO_570:
1963                 res = acpi_evalf(NULL, NULL,
1964                                  "\\_SB.PHS2", "vdd",
1965                                  TP_ACPI_VIDEO_570_PHS2CMD,
1966                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1967                 break;
1968         case TPACPI_VIDEO_770:
1969                 autosw = video_autosw_get();
1970                 if (autosw < 0)
1971                         return autosw;
1972
1973                 res = video_autosw_set(1);
1974                 if (res)
1975                         return res;
1976                 res = acpi_evalf(vid_handle, NULL,
1977                                  "ASWT", "vdd", status * 0x100, 0);
1978                 if (!autosw && video_autosw_set(autosw)) {
1979                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1980                         return -EIO;
1981                 }
1982                 break;
1983         case TPACPI_VIDEO_NEW:
1984                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1985                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1986                 break;
1987         default:
1988                 return -ENOSYS;
1989         }
1990
1991         return (res)? 0 : -EIO;
1992 }
1993
1994 static int video_autosw_get(void)
1995 {
1996         int autosw = 0;
1997
1998         switch (video_supported) {
1999         case TPACPI_VIDEO_570:
2000                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2001                         return -EIO;
2002                 break;
2003         case TPACPI_VIDEO_770:
2004         case TPACPI_VIDEO_NEW:
2005                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2006                         return -EIO;
2007                 break;
2008         default:
2009                 return -ENOSYS;
2010         }
2011
2012         return autosw & 1;
2013 }
2014
2015 static int video_autosw_set(int enable)
2016 {
2017         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2018                 return -EIO;
2019         return 0;
2020 }
2021
2022 static int video_outputsw_cycle(void)
2023 {
2024         int autosw = video_autosw_get();
2025         int res;
2026
2027         if (autosw < 0)
2028                 return autosw;
2029
2030         switch (video_supported) {
2031         case TPACPI_VIDEO_570:
2032                 res = video_autosw_set(1);
2033                 if (res)
2034                         return res;
2035                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2036                 break;
2037         case TPACPI_VIDEO_770:
2038         case TPACPI_VIDEO_NEW:
2039                 res = video_autosw_set(1);
2040                 if (res)
2041                         return res;
2042                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2043                 break;
2044         default:
2045                 return -ENOSYS;
2046         }
2047         if (!autosw && video_autosw_set(autosw)) {
2048                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
2049                 return -EIO;
2050         }
2051
2052         return (res)? 0 : -EIO;
2053 }
2054
2055 static int video_expand_toggle(void)
2056 {
2057         switch (video_supported) {
2058         case TPACPI_VIDEO_570:
2059                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2060                         0 : -EIO;
2061         case TPACPI_VIDEO_770:
2062                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2063                         0 : -EIO;
2064         case TPACPI_VIDEO_NEW:
2065                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2066                         0 : -EIO;
2067         default:
2068                 return -ENOSYS;
2069         }
2070         /* not reached */
2071 }
2072
2073 static int video_read(char *p)
2074 {
2075         int status, autosw;
2076         int len = 0;
2077
2078         if (video_supported == TPACPI_VIDEO_NONE) {
2079                 len += sprintf(p + len, "status:\t\tnot supported\n");
2080                 return len;
2081         }
2082
2083         status = video_outputsw_get();
2084         if (status < 0)
2085                 return status;
2086
2087         autosw = video_autosw_get();
2088         if (autosw < 0)
2089                 return autosw;
2090
2091         len += sprintf(p + len, "status:\t\tsupported\n");
2092         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
2093         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2094         if (video_supported == TPACPI_VIDEO_NEW)
2095                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2096         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2097         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2098         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2099         if (video_supported == TPACPI_VIDEO_NEW)
2100                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2101         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2102         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2103
2104         return len;
2105 }
2106
2107 static int video_write(char *buf)
2108 {
2109         char *cmd;
2110         int enable, disable, status;
2111         int res;
2112
2113         if (video_supported == TPACPI_VIDEO_NONE)
2114                 return -ENODEV;
2115
2116         enable = 0;
2117         disable = 0;
2118
2119         while ((cmd = next_cmd(&buf))) {
2120                 if (strlencmp(cmd, "lcd_enable") == 0) {
2121                         enable |= TP_ACPI_VIDEO_S_LCD;
2122                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2123                         disable |= TP_ACPI_VIDEO_S_LCD;
2124                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2125                         enable |= TP_ACPI_VIDEO_S_CRT;
2126                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2127                         disable |= TP_ACPI_VIDEO_S_CRT;
2128                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2129                            strlencmp(cmd, "dvi_enable") == 0) {
2130                         enable |= TP_ACPI_VIDEO_S_DVI;
2131                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2132                            strlencmp(cmd, "dvi_disable") == 0) {
2133                         disable |= TP_ACPI_VIDEO_S_DVI;
2134                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2135                         res = video_autosw_set(1);
2136                         if (res)
2137                                 return res;
2138                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2139                         res = video_autosw_set(0);
2140                         if (res)
2141                                 return res;
2142                 } else if (strlencmp(cmd, "video_switch") == 0) {
2143                         res = video_outputsw_cycle();
2144                         if (res)
2145                                 return res;
2146                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2147                         res = video_expand_toggle();
2148                         if (res)
2149                                 return res;
2150                 } else
2151                         return -EINVAL;
2152         }
2153
2154         if (enable || disable) {
2155                 status = video_outputsw_get();
2156                 if (status < 0)
2157                         return status;
2158                 res = video_outputsw_set((status & ~disable) | enable);
2159                 if (res)
2160                         return res;
2161         }
2162
2163         return 0;
2164 }
2165
2166 static struct ibm_struct video_driver_data = {
2167         .name = "video",
2168         .read = video_read,
2169         .write = video_write,
2170         .exit = video_exit,
2171 };
2172
2173 /*************************************************************************
2174  * Light (thinklight) subdriver
2175  */
2176
2177 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
2178 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
2179
2180 static int __init light_init(struct ibm_init_struct *iibm)
2181 {
2182         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2183
2184         IBM_ACPIHANDLE_INIT(ledb);
2185         IBM_ACPIHANDLE_INIT(lght);
2186         IBM_ACPIHANDLE_INIT(cmos);
2187
2188         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
2189         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
2190
2191         if (tp_features.light)
2192                 /* light status not supported on
2193                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
2194                 tp_features.light_status =
2195                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
2196
2197         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
2198                 str_supported(tp_features.light));
2199
2200         return (tp_features.light)? 0 : 1;
2201 }
2202
2203 static int light_read(char *p)
2204 {
2205         int len = 0;
2206         int status = 0;
2207
2208         if (!tp_features.light) {
2209                 len += sprintf(p + len, "status:\t\tnot supported\n");
2210         } else if (!tp_features.light_status) {
2211                 len += sprintf(p + len, "status:\t\tunknown\n");
2212                 len += sprintf(p + len, "commands:\ton, off\n");
2213         } else {
2214                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
2215                         return -EIO;
2216                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
2217                 len += sprintf(p + len, "commands:\ton, off\n");
2218         }
2219
2220         return len;
2221 }
2222
2223 static int light_write(char *buf)
2224 {
2225         int cmos_cmd, lght_cmd;
2226         char *cmd;
2227         int success;
2228
2229         if (!tp_features.light)
2230                 return -ENODEV;
2231
2232         while ((cmd = next_cmd(&buf))) {
2233                 if (strlencmp(cmd, "on") == 0) {
2234                         cmos_cmd = 0x0c;
2235                         lght_cmd = 1;
2236                 } else if (strlencmp(cmd, "off") == 0) {
2237                         cmos_cmd = 0x0d;
2238                         lght_cmd = 0;
2239                 } else
2240                         return -EINVAL;
2241
2242                 success = cmos_handle ?
2243                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
2244                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
2245                 if (!success)
2246                         return -EIO;
2247         }
2248
2249         return 0;
2250 }
2251
2252 static struct ibm_struct light_driver_data = {
2253         .name = "light",
2254         .read = light_read,
2255         .write = light_write,
2256 };
2257
2258 /*************************************************************************
2259  * Dock subdriver
2260  */
2261
2262 #ifdef CONFIG_THINKPAD_ACPI_DOCK
2263
2264 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
2265            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
2266            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
2267            "\\_SB.PCI.ISA.SLCE",        /* 570 */
2268     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
2269
2270 /* don't list other alternatives as we install a notify handler on the 570 */
2271 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
2272
2273 static const struct acpi_device_id ibm_pci_device_ids[] = {
2274         {PCI_ROOT_HID_STRING, 0},
2275         {"", 0},
2276 };
2277
2278 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
2279         {
2280          .notify = dock_notify,
2281          .handle = &dock_handle,
2282          .type = ACPI_SYSTEM_NOTIFY,
2283         },
2284         {
2285         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
2286          * We just use it to get notifications of dock hotplug
2287          * in very old thinkpads */
2288          .hid = ibm_pci_device_ids,
2289          .notify = dock_notify,
2290          .handle = &pci_handle,
2291          .type = ACPI_SYSTEM_NOTIFY,
2292         },
2293 };
2294
2295 static struct ibm_struct dock_driver_data[2] = {
2296         {
2297          .name = "dock",
2298          .read = dock_read,
2299          .write = dock_write,
2300          .acpi = &ibm_dock_acpidriver[0],
2301         },
2302         {
2303          .name = "dock",
2304          .acpi = &ibm_dock_acpidriver[1],
2305         },
2306 };
2307
2308 #define dock_docked() (_sta(dock_handle) & 1)
2309
2310 static int __init dock_init(struct ibm_init_struct *iibm)
2311 {
2312         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
2313
2314         IBM_ACPIHANDLE_INIT(dock);
2315
2316         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
2317                 str_supported(dock_handle != NULL));
2318
2319         return (dock_handle)? 0 : 1;
2320 }
2321
2322 static int __init dock_init2(struct ibm_init_struct *iibm)
2323 {
2324         int dock2_needed;
2325
2326         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
2327
2328         if (dock_driver_data[0].flags.acpi_driver_registered &&
2329             dock_driver_data[0].flags.acpi_notify_installed) {
2330                 IBM_ACPIHANDLE_INIT(pci);
2331                 dock2_needed = (pci_handle != NULL);
2332                 vdbg_printk(TPACPI_DBG_INIT,
2333                             "dock PCI handler for the TP 570 is %s\n",
2334                             str_supported(dock2_needed));
2335         } else {
2336                 vdbg_printk(TPACPI_DBG_INIT,
2337                 "dock subdriver part 2 not required\n");
2338                 dock2_needed = 0;
2339         }
2340
2341         return (dock2_needed)? 0 : 1;
2342 }
2343
2344 static void dock_notify(struct ibm_struct *ibm, u32 event)
2345 {
2346         int docked = dock_docked();
2347         int pci = ibm->acpi->hid && ibm->acpi->device &&
2348                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
2349         int data;
2350
2351         if (event == 1 && !pci) /* 570 */
2352                 data = 1;       /* button */
2353         else if (event == 1 && pci)     /* 570 */
2354                 data = 3;       /* dock */
2355         else if (event == 3 && docked)
2356                 data = 1;       /* button */
2357         else if (event == 3 && !docked)
2358                 data = 2;       /* undock */
2359         else if (event == 0 && docked)
2360                 data = 3;       /* dock */
2361         else {
2362                 printk(IBM_ERR "unknown dock event %d, status %d\n",
2363                        event, _sta(dock_handle));
2364                 data = 0;       /* unknown */
2365         }
2366         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
2367         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2368                                           ibm->acpi->device->dev.bus_id,
2369                                           event, data);
2370 }
2371
2372 static int dock_read(char *p)
2373 {
2374         int len = 0;
2375         int docked = dock_docked();
2376
2377         if (!dock_handle)
2378                 len += sprintf(p + len, "status:\t\tnot supported\n");
2379         else if (!docked)
2380                 len += sprintf(p + len, "status:\t\tundocked\n");
2381         else {
2382                 len += sprintf(p + len, "status:\t\tdocked\n");
2383                 len += sprintf(p + len, "commands:\tdock, undock\n");
2384         }
2385
2386         return len;
2387 }
2388
2389 static int dock_write(char *buf)
2390 {
2391         char *cmd;
2392
2393         if (!dock_docked())
2394                 return -ENODEV;
2395
2396         while ((cmd = next_cmd(&buf))) {
2397                 if (strlencmp(cmd, "undock") == 0) {
2398                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
2399                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
2400                                 return -EIO;
2401                 } else if (strlencmp(cmd, "dock") == 0) {
2402                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
2403                                 return -EIO;
2404                 } else
2405                         return -EINVAL;
2406         }
2407
2408         return 0;
2409 }
2410
2411 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
2412
2413 /*************************************************************************
2414  * Bay subdriver
2415  */
2416
2417 #ifdef CONFIG_THINKPAD_ACPI_BAY
2418 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
2419            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
2420            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
2421            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2422            );                           /* A21e, R30, R31 */
2423 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2424            "_EJ0",              /* all others */
2425            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2426 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2427            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2428            );                           /* all others */
2429 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2430            "_EJ0",                      /* 770x */
2431            );                           /* all others */
2432
2433 static int __init bay_init(struct ibm_init_struct *iibm)
2434 {
2435         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2436
2437         IBM_ACPIHANDLE_INIT(bay);
2438         if (bay_handle)
2439                 IBM_ACPIHANDLE_INIT(bay_ej);
2440         IBM_ACPIHANDLE_INIT(bay2);
2441         if (bay2_handle)
2442                 IBM_ACPIHANDLE_INIT(bay2_ej);
2443
2444         tp_features.bay_status = bay_handle &&
2445                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2446         tp_features.bay_status2 = bay2_handle &&
2447                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2448
2449         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2450                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2451         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2452                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2453
2454         vdbg_printk(TPACPI_DBG_INIT,
2455                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2456                 str_supported(tp_features.bay_status),
2457                 str_supported(tp_features.bay_eject),
2458                 str_supported(tp_features.bay_status2),
2459                 str_supported(tp_features.bay_eject2));
2460
2461         return (tp_features.bay_status || tp_features.bay_eject ||
2462                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2463 }
2464
2465 static void bay_notify(struct ibm_struct *ibm, u32 event)
2466 {
2467         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
2468         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
2469                                           ibm->acpi->device->dev.bus_id,
2470                                           event, 0);
2471 }
2472
2473 #define bay_occupied(b) (_sta(b##_handle) & 1)
2474
2475 static int bay_read(char *p)
2476 {
2477         int len = 0;
2478         int occupied = bay_occupied(bay);
2479         int occupied2 = bay_occupied(bay2);
2480         int eject, eject2;
2481
2482         len += sprintf(p + len, "status:\t\t%s\n",
2483                 tp_features.bay_status ?
2484                         (occupied ? "occupied" : "unoccupied") :
2485                                 "not supported");
2486         if (tp_features.bay_status2)
2487                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2488                                "occupied" : "unoccupied");
2489
2490         eject = tp_features.bay_eject && occupied;
2491         eject2 = tp_features.bay_eject2 && occupied2;
2492
2493         if (eject && eject2)
2494                 len += sprintf(p + len, "commands:\teject, eject2\n");
2495         else if (eject)
2496                 len += sprintf(p + len, "commands:\teject\n");
2497         else if (eject2)
2498                 len += sprintf(p + len, "commands:\teject2\n");
2499
2500         return len;
2501 }
2502
2503 static int bay_write(char *buf)
2504 {
2505         char *cmd;
2506
2507         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2508                 return -ENODEV;
2509
2510         while ((cmd = next_cmd(&buf))) {
2511                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2512                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2513                                 return -EIO;
2514                 } else if (tp_features.bay_eject2 &&
2515                            strlencmp(cmd, "eject2") == 0) {
2516                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2517                                 return -EIO;
2518                 } else
2519                         return -EINVAL;
2520         }
2521
2522         return 0;
2523 }
2524
2525 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2526         .notify = bay_notify,
2527         .handle = &bay_handle,
2528         .type = ACPI_SYSTEM_NOTIFY,
2529 };
2530
2531 static struct ibm_struct bay_driver_data = {
2532         .name = "bay",
2533         .read = bay_read,
2534         .write = bay_write,
2535         .acpi = &ibm_bay_acpidriver,
2536 };
2537
2538 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2539
2540 /*************************************************************************
2541  * CMOS subdriver
2542  */
2543
2544 /* sysfs cmos_command -------------------------------------------------- */
2545 static ssize_t cmos_command_store(struct device *dev,
2546                             struct device_attribute *attr,
2547                             const char *buf, size_t count)
2548 {
2549         unsigned long cmos_cmd;
2550         int res;
2551
2552         if (parse_strtoul(buf, 21, &cmos_cmd))
2553                 return -EINVAL;
2554
2555         res = issue_thinkpad_cmos_command(cmos_cmd);
2556         return (res)? res : count;
2557 }
2558
2559 static struct device_attribute dev_attr_cmos_command =
2560         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2561
2562 /* --------------------------------------------------------------------- */
2563
2564 static int __init cmos_init(struct ibm_init_struct *iibm)
2565 {
2566         int res;
2567
2568         vdbg_printk(TPACPI_DBG_INIT,
2569                 "initializing cmos commands subdriver\n");
2570
2571         IBM_ACPIHANDLE_INIT(cmos);
2572
2573         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2574                 str_supported(cmos_handle != NULL));
2575
2576         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2577         if (res)
2578                 return res;
2579
2580         return (cmos_handle)? 0 : 1;
2581 }
2582
2583 static void cmos_exit(void)
2584 {
2585         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2586 }
2587
2588 static int cmos_read(char *p)
2589 {
2590         int len = 0;
2591
2592         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2593            R30, R31, T20-22, X20-21 */
2594         if (!cmos_handle)
2595                 len += sprintf(p + len, "status:\t\tnot supported\n");
2596         else {
2597                 len += sprintf(p + len, "status:\t\tsupported\n");
2598                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2599         }
2600
2601         return len;
2602 }
2603
2604 static int cmos_write(char *buf)
2605 {
2606         char *cmd;
2607         int cmos_cmd, res;
2608
2609         while ((cmd = next_cmd(&buf))) {
2610                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2611                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2612                         /* cmos_cmd set */
2613                 } else
2614                         return -EINVAL;
2615
2616                 res = issue_thinkpad_cmos_command(cmos_cmd);
2617                 if (res)
2618                         return res;
2619         }
2620
2621         return 0;
2622 }
2623
2624 static struct ibm_struct cmos_driver_data = {
2625         .name = "cmos",
2626         .read = cmos_read,
2627         .write = cmos_write,
2628         .exit = cmos_exit,
2629 };
2630
2631 /*************************************************************************
2632  * LED subdriver
2633  */
2634
2635 static enum led_access_mode led_supported;
2636
2637 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2638            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2639            "LED",               /* all others */
2640            );                   /* R30, R31 */
2641
2642 static int __init led_init(struct ibm_init_struct *iibm)
2643 {
2644         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2645
2646         IBM_ACPIHANDLE_INIT(led);
2647
2648         if (!led_handle)
2649                 /* led not supported on R30, R31 */
2650                 led_supported = TPACPI_LED_NONE;
2651         else if (strlencmp(led_path, "SLED") == 0)
2652                 /* 570 */
2653                 led_supported = TPACPI_LED_570;
2654         else if (strlencmp(led_path, "SYSL") == 0)
2655                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2656                 led_supported = TPACPI_LED_OLD;
2657         else
2658                 /* all others */
2659                 led_supported = TPACPI_LED_NEW;
2660
2661         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2662                 str_supported(led_supported), led_supported);
2663
2664         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2665 }
2666
2667 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2668
2669 static int led_read(char *p)
2670 {
2671         int len = 0;
2672
2673         if (!led_supported) {
2674                 len += sprintf(p + len, "status:\t\tnot supported\n");
2675                 return len;
2676         }
2677         len += sprintf(p + len, "status:\t\tsupported\n");
2678
2679         if (led_supported == TPACPI_LED_570) {
2680                 /* 570 */
2681                 int i, status;
2682                 for (i = 0; i < 8; i++) {
2683                         if (!acpi_evalf(ec_handle,
2684                                         &status, "GLED", "dd", 1 << i))
2685                                 return -EIO;
2686                         len += sprintf(p + len, "%d:\t\t%s\n",
2687                                        i, led_status(status));
2688                 }
2689         }
2690
2691         len += sprintf(p + len, "commands:\t"
2692                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2693
2694         return len;
2695 }
2696
2697 /* off, on, blink */
2698 static const int led_sled_arg1[] = { 0, 1, 3 };
2699 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2700 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2701 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2702
2703 static int led_write(char *buf)
2704 {
2705         char *cmd;
2706         int led, ind, ret;
2707
2708         if (!led_supported)
2709                 return -ENODEV;
2710
2711         while ((cmd = next_cmd(&buf))) {
2712                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2713                         return -EINVAL;
2714
2715                 if (strstr(cmd, "off")) {
2716                         ind = 0;
2717                 } else if (strstr(cmd, "on")) {
2718                         ind = 1;
2719                 } else if (strstr(cmd, "blink")) {
2720                         ind = 2;
2721                 } else
2722                         return -EINVAL;
2723
2724                 if (led_supported == TPACPI_LED_570) {
2725                         /* 570 */
2726                         led = 1 << led;
2727                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2728                                         led, led_sled_arg1[ind]))
2729                                 return -EIO;
2730                 } else if (led_supported == TPACPI_LED_OLD) {
2731                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2732                         led = 1 << led;
2733                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2734                         if (ret >= 0)
2735                                 ret =
2736                                     ec_write(TPACPI_LED_EC_HLBL,
2737                                              led * led_exp_hlbl[ind]);
2738                         if (ret >= 0)
2739                                 ret =
2740                                     ec_write(TPACPI_LED_EC_HLCL,
2741                                              led * led_exp_hlcl[ind]);
2742                         if (ret < 0)
2743                                 return ret;
2744                 } else {
2745                         /* all others */
2746                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2747                                         led, led_led_arg1[ind]))
2748                                 return -EIO;
2749                 }
2750         }
2751
2752         return 0;
2753 }
2754
2755 static struct ibm_struct led_driver_data = {
2756         .name = "led",
2757         .read = led_read,
2758         .write = led_write,
2759 };
2760
2761 /*************************************************************************
2762  * Beep subdriver
2763  */
2764
2765 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2766
2767 static int __init beep_init(struct ibm_init_struct *iibm)
2768 {
2769         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2770
2771         IBM_ACPIHANDLE_INIT(beep);
2772
2773         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2774                 str_supported(beep_handle != NULL));
2775
2776         return (beep_handle)? 0 : 1;
2777 }
2778
2779 static int beep_read(char *p)
2780 {
2781         int len = 0;
2782
2783         if (!beep_handle)
2784                 len += sprintf(p + len, "status:\t\tnot supported\n");
2785         else {
2786                 len += sprintf(p + len, "status:\t\tsupported\n");
2787                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2788         }
2789
2790         return len;
2791 }
2792
2793 static int beep_write(char *buf)
2794 {
2795         char *cmd;
2796         int beep_cmd;
2797
2798         if (!beep_handle)
2799                 return -ENODEV;
2800
2801         while ((cmd = next_cmd(&buf))) {
2802                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2803                     beep_cmd >= 0 && beep_cmd <= 17) {
2804                         /* beep_cmd set */
2805                 } else
2806                         return -EINVAL;
2807                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2808                         return -EIO;
2809         }
2810
2811         return 0;
2812 }
2813
2814 static struct ibm_struct beep_driver_data = {
2815         .name = "beep",
2816         .read = beep_read,
2817         .write = beep_write,
2818 };
2819
2820 /*************************************************************************
2821  * Thermal subdriver
2822  */
2823
2824 static enum thermal_access_mode thermal_read_mode;
2825
2826 /* sysfs temp##_input -------------------------------------------------- */
2827
2828 static ssize_t thermal_temp_input_show(struct device *dev,
2829                            struct device_attribute *attr,
2830                            char *buf)
2831 {
2832         struct sensor_device_attribute *sensor_attr =
2833                                         to_sensor_dev_attr(attr);
2834         int idx = sensor_attr->index;
2835         s32 value;
2836         int res;
2837
2838         res = thermal_get_sensor(idx, &value);
2839         if (res)
2840                 return res;
2841         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2842                 return -ENXIO;
2843
2844         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2845 }
2846
2847 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2848          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2849
2850 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2851         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2852         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2853         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2854         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2855         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2856         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2857         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2858         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2859         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2860         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2861         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2862         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2863         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2864         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2865         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2866         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2867 };
2868
2869 #define THERMAL_ATTRS(X) \
2870         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2871
2872 static struct attribute *thermal_temp_input_attr[] = {
2873         THERMAL_ATTRS(8),
2874         THERMAL_ATTRS(9),
2875         THERMAL_ATTRS(10),
2876         THERMAL_ATTRS(11),
2877         THERMAL_ATTRS(12),
2878         THERMAL_ATTRS(13),
2879         THERMAL_ATTRS(14),
2880         THERMAL_ATTRS(15),
2881         THERMAL_ATTRS(0),
2882         THERMAL_ATTRS(1),
2883         THERMAL_ATTRS(2),
2884         THERMAL_ATTRS(3),
2885         THERMAL_ATTRS(4),
2886         THERMAL_ATTRS(5),
2887         THERMAL_ATTRS(6),
2888         THERMAL_ATTRS(7),
2889         NULL
2890 };
2891
2892 static const struct attribute_group thermal_temp_input16_group = {
2893         .attrs = thermal_temp_input_attr
2894 };
2895
2896 static const struct attribute_group thermal_temp_input8_group = {
2897         .attrs = &thermal_temp_input_attr[8]
2898 };
2899
2900 #undef THERMAL_SENSOR_ATTR_TEMP
2901 #undef THERMAL_ATTRS
2902
2903 /* --------------------------------------------------------------------- */
2904
2905 static int __init thermal_init(struct ibm_init_struct *iibm)
2906 {
2907         u8 t, ta1, ta2;
2908         int i;
2909         int acpi_tmp7;
2910         int res;
2911
2912         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2913
2914         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2915
2916         if (thinkpad_id.ec_model) {
2917                 /*
2918                  * Direct EC access mode: sensors at registers
2919                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2920                  * non-implemented, thermal sensors return 0x80 when
2921                  * not available
2922                  */
2923
2924                 ta1 = ta2 = 0;
2925                 for (i = 0; i < 8; i++) {
2926                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2927                                 ta1 |= t;
2928                         } else {
2929                                 ta1 = 0;
2930                                 break;
2931                         }
2932                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2933                                 ta2 |= t;
2934                         } else {
2935                                 ta1 = 0;
2936                                 break;
2937                         }
2938                 }
2939                 if (ta1 == 0) {
2940                         /* This is sheer paranoia, but we handle it anyway */
2941                         if (acpi_tmp7) {
2942                                 printk(IBM_ERR
2943                                        "ThinkPad ACPI EC access misbehaving, "
2944                                        "falling back to ACPI TMPx access mode\n");
2945                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2946                         } else {
2947                                 printk(IBM_ERR
2948                                        "ThinkPad ACPI EC access misbehaving, "
2949                                        "disabling thermal sensors access\n");
2950                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2951                         }
2952                 } else {
2953                         thermal_read_mode =
2954                             (ta2 != 0) ?
2955                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2956                 }
2957         } else if (acpi_tmp7) {
2958                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2959                         /* 600e/x, 770e, 770x */
2960                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2961                 } else {
2962                         /* Standard ACPI TMPx access, max 8 sensors */
2963                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2964                 }
2965         } else {
2966                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2967                 thermal_read_mode = TPACPI_THERMAL_NONE;
2968         }
2969
2970         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2971                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2972                 thermal_read_mode);
2973
2974         switch(thermal_read_mode) {
2975         case TPACPI_THERMAL_TPEC_16:
2976                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2977                                 &thermal_temp_input16_group);
2978                 if (res)
2979                         return res;
2980                 break;
2981         case TPACPI_THERMAL_TPEC_8:
2982         case TPACPI_THERMAL_ACPI_TMP07:
2983         case TPACPI_THERMAL_ACPI_UPDT:
2984                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
2985                                 &thermal_temp_input8_group);
2986                 if (res)
2987                         return res;
2988                 break;
2989         case TPACPI_THERMAL_NONE:
2990         default:
2991                 return 1;
2992         }
2993
2994         return 0;
2995 }
2996
2997 static void thermal_exit(void)
2998 {
2999         switch(thermal_read_mode) {
3000         case TPACPI_THERMAL_TPEC_16:
3001                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3002                                    &thermal_temp_input16_group);
3003                 break;
3004         case TPACPI_THERMAL_TPEC_8:
3005         case TPACPI_THERMAL_ACPI_TMP07:
3006         case TPACPI_THERMAL_ACPI_UPDT:
3007                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3008                                    &thermal_temp_input16_group);
3009                 break;
3010         case TPACPI_THERMAL_NONE:
3011         default:
3012                 break;
3013         }
3014 }
3015
3016 /* idx is zero-based */
3017 static int thermal_get_sensor(int idx, s32 *value)
3018 {
3019         int t;
3020         s8 tmp;
3021         char tmpi[5];
3022
3023         t = TP_EC_THERMAL_TMP0;
3024
3025         switch (thermal_read_mode) {
3026 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3027         case TPACPI_THERMAL_TPEC_16:
3028                 if (idx >= 8 && idx <= 15) {
3029                         t = TP_EC_THERMAL_TMP8;
3030                         idx -= 8;
3031                 }
3032                 /* fallthrough */
3033 #endif
3034         case TPACPI_THERMAL_TPEC_8:
3035                 if (idx <= 7) {
3036                         if (!acpi_ec_read(t + idx, &tmp))
3037                                 return -EIO;
3038                         *value = tmp * 1000;
3039                         return 0;
3040                 }
3041                 break;
3042
3043         case TPACPI_THERMAL_ACPI_UPDT:
3044                 if (idx <= 7) {
3045                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3046                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3047                                 return -EIO;
3048                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3049                                 return -EIO;
3050                         *value = (t - 2732) * 100;
3051                         return 0;
3052                 }
3053                 break;
3054
3055         case TPACPI_THERMAL_ACPI_TMP07:
3056                 if (idx <= 7) {
3057                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3058                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3059                                 return -EIO;
3060                         if (t > 127 || t < -127)
3061                                 t = TP_EC_THERMAL_TMP_NA;
3062                         *value = t * 1000;
3063                         return 0;
3064                 }
3065                 break;
3066
3067         case TPACPI_THERMAL_NONE:
3068         default:
3069                 return -ENOSYS;
3070         }
3071
3072         return -EINVAL;
3073 }
3074
3075 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3076 {
3077         int res, i;
3078         int n;
3079
3080         n = 8;
3081         i = 0;
3082
3083         if (!s)
3084                 return -EINVAL;
3085
3086         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3087                 n = 16;
3088
3089         for(i = 0 ; i < n; i++) {
3090                 res = thermal_get_sensor(i, &s->temp[i]);
3091                 if (res)
3092                         return res;
3093         }
3094
3095         return n;
3096 }
3097
3098 static int thermal_read(char *p)
3099 {
3100         int len = 0;
3101         int n, i;
3102         struct ibm_thermal_sensors_struct t;
3103
3104         n = thermal_get_sensors(&t);
3105         if (unlikely(n < 0))
3106                 return n;
3107
3108         len += sprintf(p + len, "temperatures:\t");
3109
3110         if (n > 0) {
3111                 for (i = 0; i < (n - 1); i++)
3112                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3113                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3114         } else
3115                 len += sprintf(p + len, "not supported\n");
3116
3117         return len;
3118 }
3119
3120 static struct ibm_struct thermal_driver_data = {
3121         .name = "thermal",
3122         .read = thermal_read,
3123         .exit = thermal_exit,
3124 };
3125
3126 /*************************************************************************
3127  * EC Dump subdriver
3128  */
3129
3130 static u8 ecdump_regs[256];
3131
3132 static int ecdump_read(char *p)
3133 {
3134         int len = 0;
3135         int i, j;
3136         u8 v;
3137
3138         len += sprintf(p + len, "EC      "
3139                        " +00 +01 +02 +03 +04 +05 +06 +07"
3140                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3141         for (i = 0; i < 256; i += 16) {
3142                 len += sprintf(p + len, "EC 0x%02x:", i);
3143                 for (j = 0; j < 16; j++) {
3144                         if (!acpi_ec_read(i + j, &v))
3145                                 break;
3146                         if (v != ecdump_regs[i + j])
3147                                 len += sprintf(p + len, " *%02x", v);
3148                         else
3149                                 len += sprintf(p + len, "  %02x", v);
3150                         ecdump_regs[i + j] = v;
3151                 }
3152                 len += sprintf(p + len, "\n");
3153                 if (j != 16)
3154                         break;
3155         }
3156
3157         /* These are way too dangerous to advertise openly... */
3158 #if 0
3159         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
3160                        " (<offset> is 00-ff, <value> is 00-ff)\n");
3161         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
3162                        " (<offset> is 00-ff, <value> is 0-255)\n");
3163 #endif
3164         return len;
3165 }
3166
3167 static int ecdump_write(char *buf)
3168 {
3169         char *cmd;
3170         int i, v;
3171
3172         while ((cmd = next_cmd(&buf))) {
3173                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
3174                         /* i and v set */
3175                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
3176                         /* i and v set */
3177                 } else
3178                         return -EINVAL;
3179                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
3180                         if (!acpi_ec_write(i, v))
3181                                 return -EIO;
3182                 } else
3183                         return -EINVAL;
3184         }
3185
3186         return 0;
3187 }
3188
3189 static struct ibm_struct ecdump_driver_data = {
3190         .name = "ecdump",
3191         .read = ecdump_read,
3192         .write = ecdump_write,
3193         .flags.experimental = 1,
3194 };
3195
3196 /*************************************************************************
3197  * Backlight/brightness subdriver
3198  */
3199
3200 static struct backlight_device *ibm_backlight_device;
3201
3202 static struct backlight_ops ibm_backlight_data = {
3203         .get_brightness = brightness_get,
3204         .update_status  = brightness_update_status,
3205 };
3206
3207 static struct mutex brightness_mutex;
3208
3209 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
3210 {
3211         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
3212         union acpi_object *obj;
3213         int rc;
3214
3215         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
3216                 obj = (union acpi_object *)buffer.pointer;
3217                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
3218                         printk(IBM_ERR "Unknown BCLL data, "
3219                                "please report this to %s\n", IBM_MAIL);
3220                         rc = 0;
3221                 } else {
3222                         rc = obj->package.count;
3223                 }
3224         } else {
3225                 return 0;
3226         }
3227
3228         kfree(buffer.pointer);
3229         return rc;
3230 }
3231
3232 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
3233                                         void *context, void **rv)
3234 {
3235         char name[ACPI_PATH_SEGMENT_LENGTH];
3236         struct acpi_buffer buffer = { sizeof(name), &name };
3237
3238         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3239             !strncmp("BCLL", name, sizeof(name) - 1)) {
3240                 if (tpacpi_query_bcll_levels(handle) == 16) {
3241                         *rv = handle;
3242                         return AE_CTRL_TERMINATE;
3243                 } else {
3244                         return AE_OK;
3245                 }
3246         } else {
3247                 return AE_OK;
3248         }
3249 }
3250
3251 static int __init brightness_check_levels(void)
3252 {
3253         int status;
3254         void *found_node = NULL;
3255
3256         if (!vid_handle) {
3257                 IBM_ACPIHANDLE_INIT(vid);
3258         }
3259         if (!vid_handle)
3260                 return 0;
3261
3262         /* Search for a BCLL package with 16 levels */
3263         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
3264                                         brightness_find_bcll, NULL, &found_node);
3265
3266         return (ACPI_SUCCESS(status) && found_node != NULL);
3267 }
3268
3269 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
3270                                         void *context, void **rv)
3271 {
3272         char name[ACPI_PATH_SEGMENT_LENGTH];
3273         struct acpi_buffer buffer = { sizeof(name), &name };
3274
3275         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
3276             !strncmp("_BCL", name, sizeof(name) - 1)) {
3277                 *rv = handle;
3278                 return AE_CTRL_TERMINATE;
3279         } else {
3280                 return AE_OK;
3281         }
3282 }
3283
3284 static int __init brightness_check_std_acpi_support(void)
3285 {
3286         int status;
3287         void *found_node = NULL;
3288
3289         if (!vid_handle) {
3290                 IBM_ACPIHANDLE_INIT(vid);
3291         }
3292         if (!vid_handle)
3293                 return 0;
3294
3295         /* Search for a _BCL method, but don't execute it */
3296         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
3297                                      brightness_find_bcl, NULL, &found_node);
3298
3299         return (ACPI_SUCCESS(status) && found_node != NULL);
3300 }
3301
3302 static int __init brightness_init(struct ibm_init_struct *iibm)
3303 {
3304         int b;
3305
3306         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
3307
3308         mutex_init(&brightness_mutex);
3309
3310         if (!brightness_enable) {
3311                 dbg_printk(TPACPI_DBG_INIT,
3312                            "brightness support disabled by module parameter\n");
3313                 return 1;
3314         } else if (brightness_enable > 1) {
3315                 if (brightness_check_std_acpi_support()) {
3316                         printk(IBM_NOTICE
3317                                "standard ACPI backlight interface available, not loading native one...\n");
3318                         return 1;
3319                 }
3320         }
3321
3322         if (!brightness_mode) {
3323                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
3324                         brightness_mode = 2;
3325                 else
3326                         brightness_mode = 3;
3327
3328                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
3329                         brightness_mode);
3330         }
3331
3332         if (brightness_mode > 3)
3333                 return -EINVAL;
3334
3335         tp_features.bright_16levels =
3336                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
3337                         brightness_check_levels();
3338
3339         b = brightness_get(NULL);
3340         if (b < 0)
3341                 return 1;
3342
3343         if (tp_features.bright_16levels)
3344                 printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");
3345
3346         ibm_backlight_device = backlight_device_register(
3347                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
3348                                         &ibm_backlight_data);
3349         if (IS_ERR(ibm_backlight_device)) {
3350                 printk(IBM_ERR "Could not register backlight device\n");
3351                 return PTR_ERR(ibm_backlight_device);
3352         }
3353         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
3354
3355         ibm_backlight_device->props.max_brightness =
3356                                 (tp_features.bright_16levels)? 15 : 7;
3357         ibm_backlight_device->props.brightness = b;
3358         backlight_update_status(ibm_backlight_device);
3359
3360         return 0;
3361 }
3362
3363 static void brightness_exit(void)
3364 {
3365         if (ibm_backlight_device) {
3366                 vdbg_printk(TPACPI_DBG_EXIT,
3367                             "calling backlight_device_unregister()\n");
3368                 backlight_device_unregister(ibm_backlight_device);
3369                 ibm_backlight_device = NULL;
3370         }
3371 }
3372
3373 static int brightness_update_status(struct backlight_device *bd)
3374 {
3375         /* it is the backlight class's job (caller) to handle
3376          * EINTR and other errors properly */
3377         return brightness_set(
3378                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
3379                  bd->props.power == FB_BLANK_UNBLANK) ?
3380                                 bd->props.brightness : 0);
3381 }
3382
3383 /*
3384  * ThinkPads can read brightness from two places: EC 0x31, or
3385  * CMOS NVRAM byte 0x5E, bits 0-3.
3386  */
3387 static int brightness_get(struct backlight_device *bd)
3388 {
3389         u8 lec = 0, lcmos = 0, level = 0;
3390
3391         if (brightness_mode & 1) {
3392                 if (!acpi_ec_read(brightness_offset, &lec))
3393                         return -EIO;
3394                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
3395                 level = lec;
3396         };
3397         if (brightness_mode & 2) {
3398                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
3399                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
3400                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
3401                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
3402                 level = lcmos;
3403         }
3404
3405         if (brightness_mode == 3 && lec != lcmos) {
3406                 printk(IBM_ERR
3407                         "CMOS NVRAM (%u) and EC (%u) do not agree "
3408                         "on display brightness level\n",
3409                         (unsigned int) lcmos,
3410                         (unsigned int) lec);
3411                 return -EIO;
3412         }
3413
3414         return level;
3415 }
3416
3417 /* May return EINTR which can always be mapped to ERESTARTSYS */
3418 static int brightness_set(int value)
3419 {
3420         int cmos_cmd, inc, i, res;
3421         int current_value;
3422
3423         if (value > ((tp_features.bright_16levels)? 15 : 7))
3424                 return -EINVAL;
3425
3426         res = mutex_lock_interruptible(&brightness_mutex);
3427         if (res < 0)
3428                 return res;
3429
3430         current_value = brightness_get(NULL);
3431         if (current_value < 0) {
3432                 res = current_value;
3433                 goto errout;
3434         }
3435
3436         cmos_cmd = value > current_value ?
3437                         TP_CMOS_BRIGHTNESS_UP :
3438                         TP_CMOS_BRIGHTNESS_DOWN;
3439         inc = (value > current_value)? 1 : -1;
3440
3441         res = 0;
3442         for (i = current_value; i != value; i += inc) {
3443                 if ((brightness_mode & 2) &&
3444                     issue_thinkpad_cmos_command(cmos_cmd)) {
3445                         res = -EIO;
3446                         goto errout;
3447                 }
3448                 if ((brightness_mode & 1) &&
3449                     !acpi_ec_write(brightness_offset, i + inc)) {
3450                         res = -EIO;
3451                         goto errout;;
3452                 }
3453         }
3454
3455 errout:
3456         mutex_unlock(&brightness_mutex);
3457         return res;
3458 }
3459
3460 static int brightness_read(char *p)
3461 {
3462         int len = 0;
3463         int level;
3464
3465         if ((level = brightness_get(NULL)) < 0) {
3466                 len += sprintf(p + len, "level:\t\tunreadable\n");
3467         } else {
3468                 len += sprintf(p + len, "level:\t\t%d\n", level);
3469                 len += sprintf(p + len, "commands:\tup, down\n");
3470                 len += sprintf(p + len, "commands:\tlevel <level>"
3471                                " (<level> is 0-%d)\n",
3472                                (tp_features.bright_16levels) ? 15 : 7);
3473         }
3474
3475         return len;
3476 }
3477
3478 static int brightness_write(char *buf)
3479 {
3480         int level;
3481         int rc;
3482         char *cmd;
3483         int max_level = (tp_features.bright_16levels) ? 15 : 7;
3484
3485         level = brightness_get(NULL);
3486         if (level < 0)
3487                 return level;
3488
3489         while ((cmd = next_cmd(&buf))) {
3490                 if (strlencmp(cmd, "up") == 0) {
3491                         if (level < max_level)
3492                                 level++;
3493                 } else if (strlencmp(cmd, "down") == 0) {
3494                         if (level > 0)
3495                                 level--;
3496                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
3497                            level >= 0 && level <= max_level) {
3498                         /* new level set */
3499                 } else
3500                         return -EINVAL;
3501         }
3502
3503         /*
3504          * Now we know what the final level should be, so we try to set it.
3505          * Doing it this way makes the syscall restartable in case of EINTR
3506          */
3507         rc = brightness_set(level);
3508         return (rc == -EINTR)? ERESTARTSYS : rc;
3509 }
3510
3511 static struct ibm_struct brightness_driver_data = {
3512         .name = "brightness",
3513         .read = brightness_read,
3514         .write = brightness_write,
3515         .exit = brightness_exit,
3516 };
3517
3518 /*************************************************************************
3519  * Volume subdriver
3520  */
3521
3522 static int volume_read(char *p)
3523 {
3524         int len = 0;
3525         u8 level;
3526
3527         if (!acpi_ec_read(volume_offset, &level)) {
3528                 len += sprintf(p + len, "level:\t\tunreadable\n");
3529         } else {
3530                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
3531                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
3532                 len += sprintf(p + len, "commands:\tup, down, mute\n");
3533                 len += sprintf(p + len, "commands:\tlevel <level>"
3534                                " (<level> is 0-15)\n");
3535         }
3536
3537         return len;
3538 }
3539
3540 static int volume_write(char *buf)
3541 {
3542         int cmos_cmd, inc, i;
3543         u8 level, mute;
3544         int new_level, new_mute;
3545         char *cmd;
3546
3547         while ((cmd = next_cmd(&buf))) {
3548                 if (!acpi_ec_read(volume_offset, &level))
3549                         return -EIO;
3550                 new_mute = mute = level & 0x40;
3551                 new_level = level = level & 0xf;
3552
3553                 if (strlencmp(cmd, "up") == 0) {
3554                         if (mute)
3555                                 new_mute = 0;
3556                         else
3557                                 new_level = level == 15 ? 15 : level + 1;
3558                 } else if (strlencmp(cmd, "down") == 0) {
3559                         if (mute)
3560                                 new_mute = 0;
3561                         else
3562                                 new_level = level == 0 ? 0 : level - 1;
3563                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
3564                            new_level >= 0 && new_level <= 15) {
3565                         /* new_level set */
3566                 } else if (strlencmp(cmd, "mute") == 0) {
3567                         new_mute = 0x40;
3568                 } else
3569                         return -EINVAL;
3570
3571                 if (new_level != level) {       /* mute doesn't change */
3572                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
3573                         inc = new_level > level ? 1 : -1;
3574
3575                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
3576                                      !acpi_ec_write(volume_offset, level)))
3577                                 return -EIO;
3578
3579                         for (i = level; i != new_level; i += inc)
3580                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
3581                                     !acpi_ec_write(volume_offset, i + inc))
3582                                         return -EIO;
3583
3584                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
3585                                      !acpi_ec_write(volume_offset,
3586                                                     new_level + mute)))
3587                                 return -EIO;
3588                 }
3589
3590                 if (new_mute != mute) { /* level doesn't change */
3591                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
3592
3593                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
3594                             !acpi_ec_write(volume_offset, level + new_mute))
3595                                 return -EIO;
3596                 }
3597         }
3598
3599         return 0;
3600 }
3601
3602 static struct ibm_struct volume_driver_data = {
3603         .name = "volume",
3604         .read = volume_read,
3605         .write = volume_write,
3606 };
3607
3608 /*************************************************************************
3609  * Fan subdriver
3610  */
3611
3612 /*
3613  * FAN ACCESS MODES
3614  *
3615  * TPACPI_FAN_RD_ACPI_GFAN:
3616  *      ACPI GFAN method: returns fan level
3617  *
3618  *      see TPACPI_FAN_WR_ACPI_SFAN
3619  *      EC 0x2f (HFSP) not available if GFAN exists
3620  *
3621  * TPACPI_FAN_WR_ACPI_SFAN:
3622  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3623  *
3624  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3625  *      it for writing.
3626  *
3627  * TPACPI_FAN_WR_TPEC:
3628  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3629  *      Supported on almost all ThinkPads
3630  *
3631  *      Fan speed changes of any sort (including those caused by the
3632  *      disengaged mode) are usually done slowly by the firmware as the
3633  *      maximum ammount of fan duty cycle change per second seems to be
3634  *      limited.
3635  *
3636  *      Reading is not available if GFAN exists.
3637  *      Writing is not available if SFAN exists.
3638  *
3639  *      Bits
3640  *       7      automatic mode engaged;
3641  *              (default operation mode of the ThinkPad)
3642  *              fan level is ignored in this mode.
3643  *       6      full speed mode (takes precedence over bit 7);
3644  *              not available on all thinkpads.  May disable
3645  *              the tachometer while the fan controller ramps up
3646  *              the speed (which can take up to a few *minutes*).
3647  *              Speeds up fan to 100% duty-cycle, which is far above
3648  *              the standard RPM levels.  It is not impossible that
3649  *              it could cause hardware damage.
3650  *      5-3     unused in some models.  Extra bits for fan level
3651  *              in others, but still useless as all values above
3652  *              7 map to the same speed as level 7 in these models.
3653  *      2-0     fan level (0..7 usually)
3654  *                      0x00 = stop
3655  *                      0x07 = max (set when temperatures critical)
3656  *              Some ThinkPads may have other levels, see
3657  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3658  *
3659  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3660  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3661  *      does so, its initial value is meaningless (0x07).
3662  *
3663  *      For firmware bugs, refer to:
3664  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3665  *
3666  *      ----
3667  *
3668  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3669  *      Main fan tachometer reading (in RPM)
3670  *
3671  *      This register is present on all ThinkPads with a new-style EC, and
3672  *      it is known not to be present on the A21m/e, and T22, as there is
3673  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3674  *      ThinkPads from this same time period (and earlier) probably lack the
3675  *      tachometer as well.
3676  *
3677  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3678  *      was never fixed by IBM to report the EC firmware version string
3679  *      probably support the tachometer (like the early X models), so
3680  *      detecting it is quite hard.  We need more data to know for sure.
3681  *
3682  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3683  *      might result.
3684  *
3685  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3686  *      mode.
3687  *
3688  *      For firmware bugs, refer to:
3689  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3690  *
3691  * TPACPI_FAN_WR_ACPI_FANS:
3692  *      ThinkPad X31, X40, X41.  Not available in the X60.
3693  *
3694  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3695  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3696  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3697  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3698  *
3699  *      The speeds are stored on handles
3700  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3701  *
3702  *      There are three default speed sets, acessible as handles:
3703  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3704  *
3705  *      ACPI DSDT switches which set is in use depending on various
3706  *      factors.
3707  *
3708  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3709  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3710  *      but the ACPI tables just mention level 7.
3711  */
3712
3713 static enum fan_status_access_mode fan_status_access_mode;
3714 static enum fan_control_access_mode fan_control_access_mode;
3715 static enum fan_control_commands fan_control_commands;
3716
3717 static u8 fan_control_initial_status;
3718 static u8 fan_control_desired_level;
3719
3720 static void fan_watchdog_fire(struct work_struct *ignored);
3721 static int fan_watchdog_maxinterval;
3722 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3723
3724 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3725 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3726            "\\FSPD",            /* 600e/x, 770e, 770x */
3727            );                   /* all others */
3728 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3729            "JFNS",              /* 770x-JL */
3730            );                   /* all others */
3731
3732 /*
3733  * SYSFS fan layout: hwmon compatible (device)
3734  *
3735  * pwm*_enable:
3736  *      0: "disengaged" mode
3737  *      1: manual mode
3738  *      2: native EC "auto" mode (recommended, hardware default)
3739  *
3740  * pwm*: set speed in manual mode, ignored otherwise.
3741  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3742  *      interpolation.
3743  *
3744  * fan*_input: tachometer reading, RPM
3745  *
3746  *
3747  * SYSFS fan layout: extensions
3748  *
3749  * fan_watchdog (driver):
3750  *      fan watchdog interval in seconds, 0 disables (default), max 120
3751  */
3752
3753 /* sysfs fan pwm1_enable ----------------------------------------------- */
3754 static ssize_t fan_pwm1_enable_show(struct device *dev,
3755                                     struct device_attribute *attr,
3756                                     char *buf)
3757 {
3758         int res, mode;
3759         u8 status;
3760
3761         res = fan_get_status_safe(&status);
3762         if (res)
3763                 return res;
3764
3765         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3766                 if (status != fan_control_initial_status) {
3767                         tp_features.fan_ctrl_status_undef = 0;
3768                 } else {
3769                         /* Return most likely status. In fact, it
3770                          * might be the only possible status */
3771                         status = TP_EC_FAN_AUTO;
3772                 }
3773         }
3774
3775         if (status & TP_EC_FAN_FULLSPEED) {
3776                 mode = 0;
3777         } else if (status & TP_EC_FAN_AUTO) {
3778                 mode = 2;
3779         } else
3780                 mode = 1;
3781
3782         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3783 }
3784
3785 static ssize_t fan_pwm1_enable_store(struct device *dev,
3786                                      struct device_attribute *attr,
3787                                      const char *buf, size_t count)
3788 {
3789         unsigned long t;
3790         int res, level;
3791
3792         if (parse_strtoul(buf, 2, &t))
3793                 return -EINVAL;
3794
3795         switch (t) {
3796         case 0:
3797                 level = TP_EC_FAN_FULLSPEED;
3798                 break;
3799         case 1:
3800                 level = TPACPI_FAN_LAST_LEVEL;
3801                 break;
3802         case 2:
3803                 level = TP_EC_FAN_AUTO;
3804                 break;
3805         case 3:
3806                 /* reserved for software-controlled auto mode */
3807                 return -ENOSYS;
3808         default:
3809                 return -EINVAL;
3810         }
3811
3812         res = fan_set_level_safe(level);
3813         if (res == -ENXIO)
3814                 return -EINVAL;
3815         else if (res < 0)
3816                 return res;
3817
3818         fan_watchdog_reset();
3819
3820         return count;
3821 }
3822
3823 static struct device_attribute dev_attr_fan_pwm1_enable =
3824         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3825                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3826
3827 /* sysfs fan pwm1 ------------------------------------------------------ */
3828 static ssize_t fan_pwm1_show(struct device *dev,
3829                              struct device_attribute *attr,
3830                              char *buf)
3831 {
3832         int res;
3833         u8 status;
3834
3835         res = fan_get_status_safe(&status);
3836         if (res)
3837                 return res;
3838
3839         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3840                 if (status != fan_control_initial_status) {
3841                         tp_features.fan_ctrl_status_undef = 0;
3842                 } else {
3843                         status = TP_EC_FAN_AUTO;
3844                 }
3845         }
3846
3847         if ((status &
3848              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3849                 status = fan_control_desired_level;
3850
3851         if (status > 7)
3852                 status = 7;
3853
3854         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3855 }
3856
3857 static ssize_t fan_pwm1_store(struct device *dev,
3858                               struct device_attribute *attr,
3859                               const char *buf, size_t count)
3860 {
3861         unsigned long s;
3862         int rc;
3863         u8 status, newlevel;
3864
3865         if (parse_strtoul(buf, 255, &s))
3866                 return -EINVAL;
3867
3868         /* scale down from 0-255 to 0-7 */
3869         newlevel = (s >> 5) & 0x07;
3870
3871         if (mutex_lock_interruptible(&fan_mutex))
3872                 return -ERESTARTSYS;
3873
3874         rc = fan_get_status(&status);
3875         if (!rc && (status &
3876                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3877                 rc = fan_set_level(newlevel);
3878                 if (rc == -ENXIO)
3879                         rc = -EINVAL;
3880                 else if (!rc) {
3881                         fan_update_desired_level(newlevel);
3882                         fan_watchdog_reset();
3883                 }
3884         }
3885
3886         mutex_unlock(&fan_mutex);
3887         return (rc)? rc : count;
3888 }
3889
3890 static struct device_attribute dev_attr_fan_pwm1 =
3891         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3892                 fan_pwm1_show, fan_pwm1_store);
3893
3894 /* sysfs fan fan1_input ------------------------------------------------ */
3895 static ssize_t fan_fan1_input_show(struct device *dev,
3896                            struct device_attribute *attr,
3897                            char *buf)
3898 {
3899         int res;
3900         unsigned int speed;
3901
3902         res = fan_get_speed(&speed);
3903         if (res < 0)
3904                 return res;
3905
3906         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3907 }
3908
3909 static struct device_attribute dev_attr_fan_fan1_input =
3910         __ATTR(fan1_input, S_IRUGO,
3911                 fan_fan1_input_show, NULL);
3912
3913 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
3914 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3915                                      char *buf)
3916 {
3917         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3918 }
3919
3920 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3921                                       const char *buf, size_t count)
3922 {
3923         unsigned long t;
3924
3925         if (parse_strtoul(buf, 120, &t))
3926                 return -EINVAL;
3927
3928         if (!fan_control_allowed)
3929                 return -EPERM;
3930
3931         fan_watchdog_maxinterval = t;
3932         fan_watchdog_reset();
3933
3934         return count;
3935 }
3936
3937 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3938                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3939
3940 /* --------------------------------------------------------------------- */
3941 static struct attribute *fan_attributes[] = {
3942         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3943         &dev_attr_fan_fan1_input.attr,
3944         NULL
3945 };
3946
3947 static const struct attribute_group fan_attr_group = {
3948         .attrs = fan_attributes,
3949 };
3950
3951 static int __init fan_init(struct ibm_init_struct *iibm)
3952 {
3953         int rc;
3954
3955         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3956
3957         mutex_init(&fan_mutex);
3958         fan_status_access_mode = TPACPI_FAN_NONE;
3959         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3960         fan_control_commands = 0;
3961         fan_watchdog_maxinterval = 0;
3962         tp_features.fan_ctrl_status_undef = 0;
3963         fan_control_desired_level = 7;
3964
3965         IBM_ACPIHANDLE_INIT(fans);
3966         IBM_ACPIHANDLE_INIT(gfan);
3967         IBM_ACPIHANDLE_INIT(sfan);
3968
3969         if (gfan_handle) {
3970                 /* 570, 600e/x, 770e, 770x */
3971                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3972         } else {
3973                 /* all other ThinkPads: note that even old-style
3974                  * ThinkPad ECs supports the fan control register */
3975                 if (likely(acpi_ec_read(fan_status_offset,
3976                                         &fan_control_initial_status))) {
3977                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3978
3979                         /* In some ThinkPads, neither the EC nor the ACPI
3980                          * DSDT initialize the fan status, and it ends up
3981                          * being set to 0x07 when it *could* be either
3982                          * 0x07 or 0x80.
3983                          *
3984                          * Enable for TP-1Y (T43), TP-78 (R51e),
3985                          * TP-76 (R52), TP-70 (T43, R52), which are known
3986                          * to be buggy. */
3987                         if (fan_control_initial_status == 0x07) {
3988                                 switch (thinkpad_id.ec_model) {
3989                                 case 0x5931: /* TP-1Y */
3990                                 case 0x3837: /* TP-78 */
3991                                 case 0x3637: /* TP-76 */
3992                                 case 0x3037: /* TP-70 */
3993                                         printk(IBM_NOTICE
3994                                                "fan_init: initial fan status is "
3995                                                "unknown, assuming it is in auto "
3996                                                "mode\n");
3997                                         tp_features.fan_ctrl_status_undef = 1;
3998                                         ;;
3999                                 }
4000                         }
4001                 } else {
4002                         printk(IBM_ERR
4003                                "ThinkPad ACPI EC access misbehaving, "
4004                                "fan status and control unavailable\n");
4005                         return 1;
4006                 }
4007         }
4008
4009         if (sfan_handle) {
4010                 /* 570, 770x-JL */
4011                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
4012                 fan_control_commands |=
4013                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
4014         } else {
4015                 if (!gfan_handle) {
4016                         /* gfan without sfan means no fan control */
4017                         /* all other models implement TP EC 0x2f control */
4018
4019                         if (fans_handle) {
4020                                 /* X31, X40, X41 */
4021                                 fan_control_access_mode =
4022                                     TPACPI_FAN_WR_ACPI_FANS;
4023                                 fan_control_commands |=
4024                                     TPACPI_FAN_CMD_SPEED |
4025                                     TPACPI_FAN_CMD_LEVEL |
4026                                     TPACPI_FAN_CMD_ENABLE;
4027                         } else {
4028                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
4029                                 fan_control_commands |=
4030                                     TPACPI_FAN_CMD_LEVEL |
4031                                     TPACPI_FAN_CMD_ENABLE;
4032                         }
4033                 }
4034         }
4035
4036         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
4037                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
4038                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
4039                 fan_status_access_mode, fan_control_access_mode);
4040
4041         /* fan control master switch */
4042         if (!fan_control_allowed) {
4043                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
4044                 fan_control_commands = 0;
4045                 dbg_printk(TPACPI_DBG_INIT,
4046                            "fan control features disabled by parameter\n");
4047         }
4048
4049         /* update fan_control_desired_level */
4050         if (fan_status_access_mode != TPACPI_FAN_NONE)
4051                 fan_get_status_safe(NULL);
4052
4053         if (fan_status_access_mode != TPACPI_FAN_NONE ||
4054             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
4055                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4056                                          &fan_attr_group);
4057                 if (!(rc < 0))
4058                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
4059                                         &driver_attr_fan_watchdog);
4060                 if (rc < 0)
4061                         return rc;
4062                 return 0;
4063         } else
4064                 return 1;
4065 }
4066
4067 /*
4068  * Call with fan_mutex held
4069  */
4070 static void fan_update_desired_level(u8 status)
4071 {
4072         if ((status &
4073              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4074                 if (status > 7)
4075                         fan_control_desired_level = 7;
4076                 else
4077                         fan_control_desired_level = status;
4078         }
4079 }
4080
4081 static int fan_get_status(u8 *status)
4082 {
4083         u8 s;
4084
4085         /* TODO:
4086          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4087
4088         switch (fan_status_access_mode) {
4089         case TPACPI_FAN_RD_ACPI_GFAN:
4090                 /* 570, 600e/x, 770e, 770x */
4091
4092                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4093                         return -EIO;
4094
4095                 if (likely(status))
4096                         *status = s & 0x07;
4097
4098                 break;
4099
4100         case TPACPI_FAN_RD_TPEC:
4101                 /* all except 570, 600e/x, 770e, 770x */
4102                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4103                         return -EIO;
4104
4105                 if (likely(status))
4106                         *status = s;
4107
4108                 break;
4109
4110         default:
4111                 return -ENXIO;
4112         }
4113
4114         return 0;
4115 }
4116
4117 static int fan_get_status_safe(u8 *status)
4118 {
4119         int rc;
4120         u8 s;
4121
4122         if (mutex_lock_interruptible(&fan_mutex))
4123                 return -ERESTARTSYS;
4124         rc = fan_get_status(&s);
4125         if (!rc)
4126                 fan_update_desired_level(s);
4127         mutex_unlock(&fan_mutex);
4128
4129         if (status)
4130                 *status = s;
4131
4132         return rc;
4133 }
4134
4135 static void fan_exit(void)
4136 {
4137         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
4138
4139         /* FIXME: can we really do this unconditionally? */
4140         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
4141         driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);
4142
4143         cancel_delayed_work(&fan_watchdog_task);
4144         flush_scheduled_work();
4145 }
4146
4147 static int fan_get_speed(unsigned int *speed)
4148 {
4149         u8 hi, lo;
4150
4151         switch (fan_status_access_mode) {
4152         case TPACPI_FAN_RD_TPEC:
4153                 /* all except 570, 600e/x, 770e, 770x */
4154                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4155                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4156                         return -EIO;
4157
4158                 if (likely(speed))
4159                         *speed = (hi << 8) | lo;
4160
4161                 break;
4162
4163         default:
4164                 return -ENXIO;
4165         }
4166
4167         return 0;
4168 }
4169
4170 static void fan_watchdog_fire(struct work_struct *ignored)
4171 {
4172         int rc;
4173
4174         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4175                 return;
4176
4177         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
4178         rc = fan_set_enable();
4179         if (rc < 0) {
4180                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
4181                         "will try again later...\n", -rc);
4182                 /* reschedule for later */
4183                 fan_watchdog_reset();
4184         }
4185 }
4186
4187 static void fan_watchdog_reset(void)
4188 {
4189         static int fan_watchdog_active;
4190
4191         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4192                 return;
4193
4194         if (fan_watchdog_active)
4195                 cancel_delayed_work(&fan_watchdog_task);
4196
4197         if (fan_watchdog_maxinterval > 0 &&
4198             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4199                 fan_watchdog_active = 1;
4200                 if (!schedule_delayed_work(&fan_watchdog_task,
4201                                 msecs_to_jiffies(fan_watchdog_maxinterval
4202                                                  * 1000))) {
4203                         printk(IBM_ERR "failed to schedule the fan watchdog, "
4204                                "watchdog will not trigger\n");
4205                 }
4206         } else
4207                 fan_watchdog_active = 0;
4208 }
4209
4210 static int fan_set_level(int level)
4211 {
4212         if (!fan_control_allowed)
4213                 return -EPERM;
4214
4215         switch (fan_control_access_mode) {
4216         case TPACPI_FAN_WR_ACPI_SFAN:
4217                 if (level >= 0 && level <= 7) {
4218                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4219                                 return -EIO;
4220                 } else
4221                         return -EINVAL;
4222                 break;
4223
4224         case TPACPI_FAN_WR_ACPI_FANS:
4225         case TPACPI_FAN_WR_TPEC:
4226                 if ((level != TP_EC_FAN_AUTO) &&
4227                     (level != TP_EC_FAN_FULLSPEED) &&
4228                     ((level < 0) || (level > 7)))
4229                         return -EINVAL;
4230
4231                 /* safety net should the EC not support AUTO
4232                  * or FULLSPEED mode bits and just ignore them */
4233                 if (level & TP_EC_FAN_FULLSPEED)
4234                         level |= 7;     /* safety min speed 7 */
4235                 else if (level & TP_EC_FAN_FULLSPEED)
4236                         level |= 4;     /* safety min speed 4 */
4237
4238                 if (!acpi_ec_write(fan_status_offset, level))
4239                         return -EIO;
4240                 else
4241                         tp_features.fan_ctrl_status_undef = 0;
4242                 break;
4243
4244         default:
4245                 return -ENXIO;
4246         }
4247         return 0;
4248 }
4249
4250 static int fan_set_level_safe(int level)
4251 {
4252         int rc;
4253
4254         if (!fan_control_allowed)
4255                 return -EPERM;
4256
4257         if (mutex_lock_interruptible(&fan_mutex))
4258                 return -ERESTARTSYS;
4259
4260         if (level == TPACPI_FAN_LAST_LEVEL)
4261                 level = fan_control_desired_level;
4262
4263         rc = fan_set_level(level);
4264         if (!rc)
4265                 fan_update_desired_level(level);
4266
4267         mutex_unlock(&fan_mutex);
4268         return rc;
4269 }
4270
4271 static int fan_set_enable(void)
4272 {
4273         u8 s;
4274         int rc;
4275
4276         if (!fan_control_allowed)
4277                 return -EPERM;
4278
4279         if (mutex_lock_interruptible(&fan_mutex))
4280                 return -ERESTARTSYS;
4281
4282         switch (fan_control_access_mode) {
4283         case TPACPI_FAN_WR_ACPI_FANS:
4284         case TPACPI_FAN_WR_TPEC:
4285                 rc = fan_get_status(&s);
4286                 if (rc < 0)
4287                         break;
4288
4289                 /* Don't go out of emergency fan mode */
4290                 if (s != 7) {
4291                         s &= 0x07;
4292                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4293                 }
4294
4295                 if (!acpi_ec_write(fan_status_offset, s))
4296                         rc = -EIO;
4297                 else {
4298                         tp_features.fan_ctrl_status_undef = 0;
4299                         rc = 0;
4300                 }
4301                 break;
4302
4303         case TPACPI_FAN_WR_ACPI_SFAN:
4304                 rc = fan_get_status(&s);
4305                 if (rc < 0)
4306                         break;
4307
4308                 s &= 0x07;
4309
4310                 /* Set fan to at least level 4 */
4311                 s |= 4;
4312
4313                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4314                         rc= -EIO;
4315                 else
4316                         rc = 0;
4317                 break;
4318
4319         default:
4320                 rc = -ENXIO;
4321         }
4322
4323         mutex_unlock(&fan_mutex);
4324         return rc;
4325 }
4326
4327 static int fan_set_disable(void)
4328 {
4329         int rc;
4330
4331         if (!fan_control_allowed)
4332                 return -EPERM;
4333
4334         if (mutex_lock_interruptible(&fan_mutex))
4335                 return -ERESTARTSYS;
4336
4337         rc = 0;
4338         switch (fan_control_access_mode) {
4339         case TPACPI_FAN_WR_ACPI_FANS:
4340         case TPACPI_FAN_WR_TPEC:
4341                 if (!acpi_ec_write(fan_status_offset, 0x00))
4342                         rc = -EIO;
4343                 else {
4344                         fan_control_desired_level = 0;
4345                         tp_features.fan_ctrl_status_undef = 0;
4346                 }
4347                 break;
4348
4349         case TPACPI_FAN_WR_ACPI_SFAN:
4350                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4351                         rc = -EIO;
4352                 else
4353                         fan_control_desired_level = 0;
4354                 break;
4355
4356         default:
4357                 rc = -ENXIO;
4358         }
4359
4360
4361         mutex_unlock(&fan_mutex);
4362         return rc;
4363 }
4364
4365 static int fan_set_speed(int speed)
4366 {
4367         int rc;
4368
4369         if (!fan_control_allowed)
4370                 return -EPERM;
4371
4372         if (mutex_lock_interruptible(&fan_mutex))
4373                 return -ERESTARTSYS;
4374
4375         rc = 0;
4376         switch (fan_control_access_mode) {
4377         case TPACPI_FAN_WR_ACPI_FANS:
4378                 if (speed >= 0 && speed <= 65535) {
4379                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4380                                         speed, speed, speed))
4381                                 rc = -EIO;
4382                 } else
4383                         rc = -EINVAL;
4384                 break;
4385
4386         default:
4387                 rc = -ENXIO;
4388         }
4389
4390         mutex_unlock(&fan_mutex);
4391         return rc;
4392 }
4393
4394 static int fan_read(char *p)
4395 {
4396         int len = 0;
4397         int rc;
4398         u8 status;
4399         unsigned int speed = 0;
4400
4401         switch (fan_status_access_mode) {
4402         case TPACPI_FAN_RD_ACPI_GFAN:
4403                 /* 570, 600e/x, 770e, 770x */
4404                 if ((rc = fan_get_status_safe(&status)) < 0)
4405                         return rc;
4406
4407                 len += sprintf(p + len, "status:\t\t%s\n"
4408                                "level:\t\t%d\n",
4409                                (status != 0) ? "enabled" : "disabled", status);
4410                 break;
4411
4412         case TPACPI_FAN_RD_TPEC:
4413                 /* all except 570, 600e/x, 770e, 770x */
4414                 if ((rc = fan_get_status_safe(&status)) < 0)
4415                         return rc;
4416
4417                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
4418                         if (status != fan_control_initial_status)
4419                                 tp_features.fan_ctrl_status_undef = 0;
4420                         else
4421                                 /* Return most likely status. In fact, it
4422                                  * might be the only possible status */
4423                                 status = TP_EC_FAN_AUTO;
4424                 }
4425
4426                 len += sprintf(p + len, "status:\t\t%s\n",
4427                                (status != 0) ? "enabled" : "disabled");
4428
4429                 if ((rc = fan_get_speed(&speed)) < 0)
4430                         return rc;
4431
4432                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
4433
4434                 if (status & TP_EC_FAN_FULLSPEED)
4435                         /* Disengaged mode takes precedence */
4436                         len += sprintf(p + len, "level:\t\tdisengaged\n");
4437                 else if (status & TP_EC_FAN_AUTO)
4438                         len += sprintf(p + len, "level:\t\tauto\n");
4439                 else
4440                         len += sprintf(p + len, "level:\t\t%d\n", status);
4441                 break;
4442
4443         case TPACPI_FAN_NONE:
4444         default:
4445                 len += sprintf(p + len, "status:\t\tnot supported\n");
4446         }
4447
4448         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
4449                 len += sprintf(p + len, "commands:\tlevel <level>");
4450
4451                 switch (fan_control_access_mode) {
4452                 case TPACPI_FAN_WR_ACPI_SFAN:
4453                         len += sprintf(p + len, " (<level> is 0-7)\n");
4454                         break;
4455
4456                 default:
4457                         len += sprintf(p + len, " (<level> is 0-7, "
4458                                        "auto, disengaged, full-speed)\n");
4459                         break;
4460                 }
4461         }
4462
4463         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
4464                 len += sprintf(p + len, "commands:\tenable, disable\n"
4465                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
4466                                "1-120 (seconds))\n");
4467
4468         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
4469                 len += sprintf(p + len, "commands:\tspeed <speed>"
4470                                " (<speed> is 0-65535)\n");
4471
4472         return len;
4473 }
4474
4475 static int fan_write_cmd_level(const char *cmd, int *rc)
4476 {
4477         int level;
4478
4479         if (strlencmp(cmd, "level auto") == 0)
4480                 level = TP_EC_FAN_AUTO;
4481         else if ((strlencmp(cmd, "level disengaged") == 0) |
4482                  (strlencmp(cmd, "level full-speed") == 0))
4483                 level = TP_EC_FAN_FULLSPEED;
4484         else if (sscanf(cmd, "level %d", &level) != 1)
4485                 return 0;
4486
4487         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
4488                 printk(IBM_ERR "level command accepted for unsupported "
4489                        "access mode %d", fan_control_access_mode);
4490
4491         return 1;
4492 }
4493
4494 static int fan_write_cmd_enable(const char *cmd, int *rc)
4495 {
4496         if (strlencmp(cmd, "enable") != 0)
4497                 return 0;
4498
4499         if ((*rc = fan_set_enable()) == -ENXIO)
4500                 printk(IBM_ERR "enable command accepted for unsupported "
4501                        "access mode %d", fan_control_access_mode);
4502
4503         return 1;
4504 }
4505
4506 static int fan_write_cmd_disable(const char *cmd, int *rc)
4507 {
4508         if (strlencmp(cmd, "disable") != 0)
4509                 return 0;
4510
4511         if ((*rc = fan_set_disable()) == -ENXIO)
4512                 printk(IBM_ERR "disable command accepted for unsupported "
4513                        "access mode %d", fan_control_access_mode);
4514
4515         return 1;
4516 }
4517
4518 static int fan_write_cmd_speed(const char *cmd, int *rc)
4519 {
4520         int speed;
4521
4522         /* TODO:
4523          * Support speed <low> <medium> <high> ? */
4524
4525         if (sscanf(cmd, "speed %d", &speed) != 1)
4526                 return 0;
4527
4528         if ((*rc = fan_set_speed(speed)) == -ENXIO)
4529                 printk(IBM_ERR "speed command accepted for unsupported "
4530                        "access mode %d", fan_control_access_mode);
4531
4532         return 1;
4533 }
4534
4535 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
4536 {
4537         int interval;
4538
4539         if (sscanf(cmd, "watchdog %d", &interval) != 1)
4540                 return 0;
4541
4542         if (interval < 0 || interval > 120)
4543                 *rc = -EINVAL;
4544         else
4545                 fan_watchdog_maxinterval = interval;
4546
4547         return 1;
4548 }
4549
4550 static int fan_write(char *buf)
4551 {
4552         char *cmd;
4553         int rc = 0;
4554
4555         while (!rc && (cmd = next_cmd(&buf))) {
4556                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
4557                       fan_write_cmd_level(cmd, &rc)) &&
4558                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
4559                       (fan_write_cmd_enable(cmd, &rc) ||
4560                        fan_write_cmd_disable(cmd, &rc) ||
4561                        fan_write_cmd_watchdog(cmd, &rc))) &&
4562                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
4563                       fan_write_cmd_speed(cmd, &rc))
4564                     )
4565                         rc = -EINVAL;
4566                 else if (!rc)
4567                         fan_watchdog_reset();
4568         }
4569
4570         return rc;
4571 }
4572
4573 static struct ibm_struct fan_driver_data = {
4574         .name = "fan",
4575         .read = fan_read,
4576         .write = fan_write,
4577         .exit = fan_exit,
4578 };
4579
4580 /****************************************************************************
4581  ****************************************************************************
4582  *
4583  * Infrastructure
4584  *
4585  ****************************************************************************
4586  ****************************************************************************/
4587
4588 /* sysfs name ---------------------------------------------------------- */
4589 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
4590                            struct device_attribute *attr,
4591                            char *buf)
4592 {
4593         return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
4594 }
4595
4596 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
4597         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
4598
4599 /* --------------------------------------------------------------------- */
4600
4601 /* /proc support */
4602 static struct proc_dir_entry *proc_dir;
4603
4604 /* Subdriver registry */
4605 static LIST_HEAD(tpacpi_all_drivers);
4606
4607
4608 /*
4609  * Module and infrastructure proble, init and exit handling
4610  */
4611
4612 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
4613 static const char * __init str_supported(int is_supported)
4614 {
4615         static char text_unsupported[] __initdata = "not supported";
4616
4617         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
4618 }
4619 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
4620
4621 static int __init ibm_init(struct ibm_init_struct *iibm)
4622 {
4623         int ret;
4624         struct ibm_struct *ibm = iibm->data;
4625         struct proc_dir_entry *entry;
4626
4627         BUG_ON(ibm == NULL);
4628
4629         INIT_LIST_HEAD(&ibm->all_drivers);
4630
4631         if (ibm->flags.experimental && !experimental)
4632                 return 0;
4633
4634         dbg_printk(TPACPI_DBG_INIT,
4635                 "probing for %s\n", ibm->name);
4636
4637         if (iibm->init) {
4638                 ret = iibm->init(iibm);
4639                 if (ret > 0)
4640                         return 0;       /* probe failed */
4641                 if (ret)
4642                         return ret;
4643
4644                 ibm->flags.init_called = 1;
4645         }
4646
4647         if (ibm->acpi) {
4648                 if (ibm->acpi->hid) {
4649                         ret = register_tpacpi_subdriver(ibm);
4650                         if (ret)
4651                                 goto err_out;
4652                 }
4653
4654                 if (ibm->acpi->notify) {
4655                         ret = setup_acpi_notify(ibm);
4656                         if (ret == -ENODEV) {
4657                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4658                                         ibm->name);
4659                                 ret = 0;
4660                                 goto err_out;
4661                         }
4662                         if (ret < 0)
4663                                 goto err_out;
4664                 }
4665         }
4666
4667         dbg_printk(TPACPI_DBG_INIT,
4668                 "%s installed\n", ibm->name);
4669
4670         if (ibm->read) {
4671                 entry = create_proc_entry(ibm->name,
4672                                           S_IFREG | S_IRUGO | S_IWUSR,
4673                                           proc_dir);
4674                 if (!entry) {
4675                         printk(IBM_ERR "unable to create proc entry %s\n",
4676                                ibm->name);
4677                         ret = -ENODEV;
4678                         goto err_out;
4679                 }
4680                 entry->owner = THIS_MODULE;
4681                 entry->data = ibm;
4682                 entry->read_proc = &dispatch_procfs_read;
4683                 if (ibm->write)
4684                         entry->write_proc = &dispatch_procfs_write;
4685                 ibm->flags.proc_created = 1;
4686         }
4687
4688         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4689
4690         return 0;
4691
4692 err_out:
4693         dbg_printk(TPACPI_DBG_INIT,
4694                 "%s: at error exit path with result %d\n",
4695                 ibm->name, ret);
4696
4697         ibm_exit(ibm);
4698         return (ret < 0)? ret : 0;
4699 }
4700
4701 static void ibm_exit(struct ibm_struct *ibm)
4702 {
4703         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4704
4705         list_del_init(&ibm->all_drivers);
4706
4707         if (ibm->flags.acpi_notify_installed) {
4708                 dbg_printk(TPACPI_DBG_EXIT,
4709                         "%s: acpi_remove_notify_handler\n", ibm->name);
4710                 BUG_ON(!ibm->acpi);
4711                 acpi_remove_notify_handler(*ibm->acpi->handle,
4712                                            ibm->acpi->type,
4713                                            dispatch_acpi_notify);
4714                 ibm->flags.acpi_notify_installed = 0;
4715                 ibm->flags.acpi_notify_installed = 0;
4716         }
4717
4718         if (ibm->flags.proc_created) {
4719                 dbg_printk(TPACPI_DBG_EXIT,
4720                         "%s: remove_proc_entry\n", ibm->name);
4721                 remove_proc_entry(ibm->name, proc_dir);
4722                 ibm->flags.proc_created = 0;
4723         }
4724
4725         if (ibm->flags.acpi_driver_registered) {
4726                 dbg_printk(TPACPI_DBG_EXIT,
4727                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4728                 BUG_ON(!ibm->acpi);
4729                 acpi_bus_unregister_driver(ibm->acpi->driver);
4730                 kfree(ibm->acpi->driver);
4731                 ibm->acpi->driver = NULL;
4732                 ibm->flags.acpi_driver_registered = 0;
4733         }
4734
4735         if (ibm->flags.init_called && ibm->exit) {
4736                 ibm->exit();
4737                 ibm->flags.init_called = 0;
4738         }
4739
4740         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4741 }
4742
4743 /* Probing */
4744
4745 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
4746 {
4747         const struct dmi_device *dev = NULL;
4748         char ec_fw_string[18];
4749
4750         if (!tp)
4751                 return;
4752
4753         memset(tp, 0, sizeof(*tp));
4754
4755         if (dmi_name_in_vendors("IBM"))
4756                 tp->vendor = PCI_VENDOR_ID_IBM;
4757         else if (dmi_name_in_vendors("LENOVO"))
4758                 tp->vendor = PCI_VENDOR_ID_LENOVO;
4759         else
4760                 return;
4761
4762         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
4763                                         GFP_KERNEL);
4764         if (!tp->bios_version_str)
4765                 return;
4766         tp->bios_model = tp->bios_version_str[0]
4767                          | (tp->bios_version_str[1] << 8);
4768
4769         /*
4770          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4771          * X32 or newer, all Z series;  Some models must have an
4772          * up-to-date BIOS or they will not be detected.
4773          *
4774          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4775          */
4776         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4777                 if (sscanf(dev->name,
4778                            "IBM ThinkPad Embedded Controller -[%17c",
4779                            ec_fw_string) == 1) {
4780                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4781                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4782
4783                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
4784                         tp->ec_model = ec_fw_string[0]
4785                                         | (ec_fw_string[1] << 8);
4786                         break;
4787                 }
4788         }
4789
4790         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
4791                                         GFP_KERNEL);
4792         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
4793                 kfree(tp->model_str);
4794                 tp->model_str = NULL;
4795         }
4796 }
4797
4798 static int __init probe_for_thinkpad(void)
4799 {
4800         int is_thinkpad;
4801
4802         if (acpi_disabled)
4803                 return -ENODEV;
4804
4805         /*
4806          * Non-ancient models have better DMI tagging, but very old models
4807          * don't.
4808          */
4809         is_thinkpad = (thinkpad_id.model_str != NULL);
4810
4811         /* ec is required because many other handles are relative to it */
4812         IBM_ACPIHANDLE_INIT(ec);
4813         if (!ec_handle) {
4814                 if (is_thinkpad)
4815                         printk(IBM_ERR
4816                                 "Not yet supported ThinkPad detected!\n");
4817                 return -ENODEV;
4818         }
4819
4820         /*
4821          * Risks a regression on very old machines, but reduces potential
4822          * false positives a damn great deal
4823          */
4824         if (!is_thinkpad)
4825                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
4826
4827         if (!is_thinkpad && !force_load)
4828                 return -ENODEV;
4829
4830         return 0;
4831 }
4832
4833
4834 /* Module init, exit, parameters */
4835
4836 static struct ibm_init_struct ibms_init[] __initdata = {
4837         {
4838                 .init = thinkpad_acpi_driver_init,
4839                 .data = &thinkpad_acpi_driver_data,
4840         },
4841         {
4842                 .init = hotkey_init,
4843                 .data = &hotkey_driver_data,
4844         },
4845         {
4846                 .init = bluetooth_init,
4847                 .data = &bluetooth_driver_data,
4848         },
4849         {
4850                 .init = wan_init,
4851                 .data = &wan_driver_data,
4852         },
4853         {
4854                 .init = video_init,
4855                 .data = &video_driver_data,
4856         },
4857         {
4858                 .init = light_init,
4859                 .data = &light_driver_data,
4860         },
4861 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4862         {
4863                 .init = dock_init,
4864                 .data = &dock_driver_data[0],
4865         },
4866         {
4867                 .init = dock_init2,
4868                 .data = &dock_driver_data[1],
4869         },
4870 #endif
4871 #ifdef CONFIG_THINKPAD_ACPI_BAY
4872         {
4873                 .init = bay_init,
4874                 .data = &bay_driver_data,
4875         },
4876 #endif
4877         {
4878                 .init = cmos_init,
4879                 .data = &cmos_driver_data,
4880         },
4881         {
4882                 .init = led_init,
4883                 .data = &led_driver_data,
4884         },
4885         {
4886                 .init = beep_init,
4887                 .data = &beep_driver_data,
4888         },
4889         {
4890                 .init = thermal_init,
4891                 .data = &thermal_driver_data,
4892         },
4893         {
4894                 .data = &ecdump_driver_data,
4895         },
4896         {
4897                 .init = brightness_init,
4898                 .data = &brightness_driver_data,
4899         },
4900         {
4901                 .data = &volume_driver_data,
4902         },
4903         {
4904                 .init = fan_init,
4905                 .data = &fan_driver_data,
4906         },
4907 };
4908
4909 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4910 {
4911         unsigned int i;
4912         struct ibm_struct *ibm;
4913
4914         if (!kp || !kp->name || !val)
4915                 return -EINVAL;
4916
4917         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4918                 ibm = ibms_init[i].data;
4919                 WARN_ON(ibm == NULL);
4920
4921                 if (!ibm || !ibm->name)
4922                         continue;
4923
4924                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4925                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4926                                 return -ENOSPC;
4927                         strcpy(ibms_init[i].param, val);
4928                         strcat(ibms_init[i].param, ",");
4929                         return 0;
4930                 }
4931         }
4932
4933         return -EINVAL;
4934 }
4935
4936 static int experimental;
4937 module_param(experimental, int, 0);
4938
4939 static u32 dbg_level;
4940 module_param_named(debug, dbg_level, uint, 0);
4941
4942 static int force_load;
4943 module_param(force_load, bool, 0);
4944
4945 static int fan_control_allowed;
4946 module_param_named(fan_control, fan_control_allowed, bool, 0);
4947
4948 static int brightness_mode;
4949 module_param_named(brightness_mode, brightness_mode, int, 0);
4950
4951 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4952 module_param(brightness_enable, uint, 0);
4953
4954 static unsigned int hotkey_report_mode;
4955 module_param(hotkey_report_mode, uint, 0);
4956
4957 #define IBM_PARAM(feature) \
4958         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4959
4960 IBM_PARAM(hotkey);
4961 IBM_PARAM(bluetooth);
4962 IBM_PARAM(video);
4963 IBM_PARAM(light);
4964 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4965 IBM_PARAM(dock);
4966 #endif
4967 #ifdef CONFIG_THINKPAD_ACPI_BAY
4968 IBM_PARAM(bay);
4969 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4970 IBM_PARAM(cmos);
4971 IBM_PARAM(led);
4972 IBM_PARAM(beep);
4973 IBM_PARAM(ecdump);
4974 IBM_PARAM(brightness);
4975 IBM_PARAM(volume);
4976 IBM_PARAM(fan);
4977
4978 static int __init thinkpad_acpi_module_init(void)
4979 {
4980         int ret, i;
4981
4982         tpacpi_lifecycle = TPACPI_LIFE_INIT;
4983
4984         /* Parameter checking */
4985         if (hotkey_report_mode > 2)
4986                 return -EINVAL;
4987
4988         /* Driver-level probe */
4989
4990         get_thinkpad_model_data(&thinkpad_id);
4991         ret = probe_for_thinkpad();
4992         if (ret) {
4993                 thinkpad_acpi_module_exit();
4994                 return ret;
4995         }
4996
4997         /* Driver initialization */
4998
4999         IBM_ACPIHANDLE_INIT(ecrd);
5000         IBM_ACPIHANDLE_INIT(ecwr);
5001
5002         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
5003         if (!proc_dir) {
5004                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
5005                 thinkpad_acpi_module_exit();
5006                 return -ENODEV;
5007         }
5008         proc_dir->owner = THIS_MODULE;
5009
5010         ret = platform_driver_register(&tpacpi_pdriver);
5011         if (ret) {
5012                 printk(IBM_ERR "unable to register main platform driver\n");
5013                 thinkpad_acpi_module_exit();
5014                 return ret;
5015         }
5016         tp_features.platform_drv_registered = 1;
5017
5018         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
5019         if (ret) {
5020                 printk(IBM_ERR "unable to register hwmon platform driver\n");
5021                 thinkpad_acpi_module_exit();
5022                 return ret;
5023         }
5024         tp_features.sensors_pdrv_registered = 1;
5025
5026         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
5027         if (!ret) {
5028                 tp_features.platform_drv_attrs_registered = 1;
5029                 ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5030         }
5031         if (ret) {
5032                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
5033                 thinkpad_acpi_module_exit();
5034                 return ret;
5035         }
5036         tp_features.sensors_pdrv_attrs_registered = 1;
5037
5038
5039         /* Device initialization */
5040         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
5041                                                         NULL, 0);
5042         if (IS_ERR(tpacpi_pdev)) {
5043                 ret = PTR_ERR(tpacpi_pdev);
5044                 tpacpi_pdev = NULL;
5045                 printk(IBM_ERR "unable to register platform device\n");
5046                 thinkpad_acpi_module_exit();
5047                 return ret;
5048         }
5049         tpacpi_sensors_pdev = platform_device_register_simple(
5050                                                         IBM_HWMON_DRVR_NAME,
5051                                                         -1, NULL, 0);
5052         if (IS_ERR(tpacpi_sensors_pdev)) {
5053                 ret = PTR_ERR(tpacpi_sensors_pdev);
5054                 tpacpi_sensors_pdev = NULL;
5055                 printk(IBM_ERR "unable to register hwmon platform device\n");
5056                 thinkpad_acpi_module_exit();
5057                 return ret;
5058         }
5059         ret = device_create_file(&tpacpi_sensors_pdev->dev,
5060                                  &dev_attr_thinkpad_acpi_pdev_name);
5061         if (ret) {
5062                 printk(IBM_ERR
5063                         "unable to create sysfs hwmon device attributes\n");
5064                 thinkpad_acpi_module_exit();
5065                 return ret;
5066         }
5067         tp_features.sensors_pdev_attrs_registered = 1;
5068         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
5069         if (IS_ERR(tpacpi_hwmon)) {
5070                 ret = PTR_ERR(tpacpi_hwmon);
5071                 tpacpi_hwmon = NULL;
5072                 printk(IBM_ERR "unable to register hwmon device\n");
5073                 thinkpad_acpi_module_exit();
5074                 return ret;
5075         }
5076         mutex_init(&tpacpi_inputdev_send_mutex);
5077         tpacpi_inputdev = input_allocate_device();
5078         if (!tpacpi_inputdev) {
5079                 printk(IBM_ERR "unable to allocate input device\n");
5080                 thinkpad_acpi_module_exit();
5081                 return -ENOMEM;
5082         } else {
5083                 /* Prepare input device, but don't register */
5084                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
5085                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
5086                 tpacpi_inputdev->id.bustype = BUS_HOST;
5087                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
5088                                                 thinkpad_id.vendor :
5089                                                 PCI_VENDOR_ID_IBM;
5090                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
5091                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
5092         }
5093         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5094                 ret = ibm_init(&ibms_init[i]);
5095                 if (ret >= 0 && *ibms_init[i].param)
5096                         ret = ibms_init[i].data->write(ibms_init[i].param);
5097                 if (ret < 0) {
5098                         thinkpad_acpi_module_exit();
5099                         return ret;
5100                 }
5101         }
5102         ret = input_register_device(tpacpi_inputdev);
5103         if (ret < 0) {
5104                 printk(IBM_ERR "unable to register input device\n");
5105                 thinkpad_acpi_module_exit();
5106                 return ret;
5107         } else {
5108                 tp_features.input_device_registered = 1;
5109         }
5110
5111         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
5112         return 0;
5113 }
5114
5115 static void thinkpad_acpi_module_exit(void)
5116 {
5117         struct ibm_struct *ibm, *itmp;
5118
5119         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5120
5121         list_for_each_entry_safe_reverse(ibm, itmp,
5122                                          &tpacpi_all_drivers,
5123                                          all_drivers) {
5124                 ibm_exit(ibm);
5125         }
5126
5127         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5128
5129         if (tpacpi_inputdev) {
5130                 if (tp_features.input_device_registered)
5131                         input_unregister_device(tpacpi_inputdev);
5132                 else
5133                         input_free_device(tpacpi_inputdev);
5134         }
5135
5136         if (tpacpi_hwmon)
5137                 hwmon_device_unregister(tpacpi_hwmon);
5138
5139         if (tp_features.sensors_pdev_attrs_registered)
5140                 device_remove_file(&tpacpi_sensors_pdev->dev,
5141                                    &dev_attr_thinkpad_acpi_pdev_name);
5142         if (tpacpi_sensors_pdev)
5143                 platform_device_unregister(tpacpi_sensors_pdev);
5144         if (tpacpi_pdev)
5145                 platform_device_unregister(tpacpi_pdev);
5146
5147         if (tp_features.sensors_pdrv_attrs_registered)
5148                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5149         if (tp_features.platform_drv_attrs_registered)
5150                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5151
5152         if (tp_features.sensors_pdrv_registered)
5153                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5154
5155         if (tp_features.platform_drv_registered)
5156                 platform_driver_unregister(&tpacpi_pdriver);
5157
5158         if (proc_dir)
5159                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
5160
5161         kfree(thinkpad_id.bios_version_str);
5162         kfree(thinkpad_id.ec_version_str);
5163         kfree(thinkpad_id.model_str);
5164 }
5165
5166 module_init(thinkpad_acpi_module_init);
5167 module_exit(thinkpad_acpi_module_exit);