drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.14"
  25 #define TPACPI_SYSFS_VERSION 0x000100
  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 #define __unused __attribute__ ((unused))
  96
  97 /****************************************************************************
  98  ****************************************************************************
  99  *
 100  * ACPI Helpers and device model
 101  *
 102  ****************************************************************************
 103  ****************************************************************************/
 104
 105 /*************************************************************************
 106  * ACPI basic handles
 107  */
 108
 109 static acpi_handle root_handle = NULL;
 110
 111 #define IBM_HANDLE(object, parent, paths...)                    \
 112         static acpi_handle  object##_handle;                    \
 113         static acpi_handle *object##_parent = &parent##_handle; \
 114         static char        *object##_path;                      \
 115         static char        *object##_paths[] = { paths }
 116
 117 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 118            "\\_SB.PCI.ISA.EC",  /* 570 */
 119            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 120            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 121            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 122            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 123            "\\_SB.PCI0.LPC.EC", /* all others */
 124            );
 125
 126 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 127 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 128
 129
 130 /*************************************************************************
 131  * Misc ACPI handles
 132  */
 133
 134 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 135            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 136            "\\CMS",             /* R40, R40e */
 137            );                   /* all others */
 138
 139 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 140            "^HKEY",             /* R30, R31 */
 141            "HKEY",              /* all others */
 142            );                   /* 570 */
 143
 144
 145 /*************************************************************************
 146  * ACPI helpers
 147  */
 148
 149 static int acpi_evalf(acpi_handle handle,
 150                       void *res, char *method, char *fmt, ...)
 151 {
 152         char *fmt0 = fmt;
 153         struct acpi_object_list params;
 154         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 155         struct acpi_buffer result, *resultp;
 156         union acpi_object out_obj;
 157         acpi_status status;
 158         va_list ap;
 159         char res_type;
 160         int success;
 161         int quiet;
 162
 163         if (!*fmt) {
 164                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 165                 return 0;
 166         }
 167
 168         if (*fmt == 'q') {
 169                 quiet = 1;
 170                 fmt++;
 171         } else
 172                 quiet = 0;
 173
 174         res_type = *(fmt++);
 175
 176         params.count = 0;
 177         params.pointer = &in_objs[0];
 178
 179         va_start(ap, fmt);
 180         while (*fmt) {
 181                 char c = *(fmt++);
 182                 switch (c) {
 183                 case 'd':       /* int */
 184                         in_objs[params.count].integer.value = va_arg(ap, int);
 185                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 186                         break;
 187                         /* add more types as needed */
 188                 default:
 189                         printk(IBM_ERR "acpi_evalf() called "
 190                                "with invalid format character '%c'\n", c);
 191                         return 0;
 192                 }
 193         }
 194         va_end(ap);
 195
 196         if (res_type != 'v') {
 197                 result.length = sizeof(out_obj);
 198                 result.pointer = &out_obj;
 199                 resultp = &result;
 200         } else
 201                 resultp = NULL;
 202
 203         status = acpi_evaluate_object(handle, method, &params, resultp);
 204
 205         switch (res_type) {
 206         case 'd':               /* int */
 207                 if (res)
 208                         *(int *)res = out_obj.integer.value;
 209                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 210                 break;
 211         case 'v':               /* void */
 212                 success = status == AE_OK;
 213                 break;
 214                 /* add more types as needed */
 215         default:
 216                 printk(IBM_ERR "acpi_evalf() called "
 217                        "with invalid format character '%c'\n", res_type);
 218                 return 0;
 219         }
 220
 221         if (!success && !quiet)
 222                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 223                        method, fmt0, status);
 224
 225         return success;
 226 }
 227
 228 static void __unused acpi_print_int(acpi_handle handle, char *method)
 229 {
 230         int i;
 231
 232         if (acpi_evalf(handle, &i, method, "d"))
 233                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 234         else
 235                 printk(IBM_ERR "error calling %s\n", method);
 236 }
 237
 238 static int acpi_ec_read(int i, u8 * p)
 239 {
 240         int v;
 241
 242         if (ecrd_handle) {
 243                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 244                         return 0;
 245                 *p = v;
 246         } else {
 247                 if (ec_read(i, p) < 0)
 248                         return 0;
 249         }
 250
 251         return 1;
 252 }
 253
 254 static int acpi_ec_write(int i, u8 v)
 255 {
 256         if (ecwr_handle) {
 257                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 258                         return 0;
 259         } else {
 260                 if (ec_write(i, v) < 0)
 261                         return 0;
 262         }
 263
 264         return 1;
 265 }
 266
 267 static int _sta(acpi_handle handle)
 268 {
 269         int status;
 270
 271         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 272                 status = 0;
 273
 274         return status;
 275 }
 276
 277 static int issue_thinkpad_cmos_command(int cmos_cmd)
 278 {
 279         if (!cmos_handle)
 280                 return -ENXIO;
 281
 282         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 283                 return -EIO;
 284
 285         return 0;
 286 }
 287
 288 /*************************************************************************
 289  * ACPI device model
 290  */
 291
 292 static void drv_acpi_handle_init(char *name,
 293                            acpi_handle *handle, acpi_handle parent,
 294                            char **paths, int num_paths, char **path)
 295 {
 296         int i;
 297         acpi_status status;
 298
 299         for (i = 0; i < num_paths; i++) {
 300                 status = acpi_get_handle(parent, paths[i], handle);
 301                 if (ACPI_SUCCESS(status)) {
 302                         *path = paths[i];
 303                         return;
 304                 }
 305         }
 306
 307         *handle = NULL;
 308 }
 309
 310 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 311 {
 312         struct ibm_struct *ibm = data;
 313
 314         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 315                 return;
 316
 317         ibm->acpi->notify(ibm, event);
 318 }
 319
 320 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 321 {
 322         acpi_status status;
 323         int ret;
 324
 325         BUG_ON(!ibm->acpi);
 326
 327         if (!*ibm->acpi->handle)
 328                 return 0;
 329
 330         dbg_printk(TPACPI_DBG_INIT,
 331                 "setting up ACPI notify for %s\n", ibm->name);
 332
 333         ret = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 334         if (ret < 0) {
 335                 printk(IBM_ERR "%s device not present\n", ibm->name);
 336                 return -ENODEV;
 337         }
 338
 339         acpi_driver_data(ibm->acpi->device) = ibm;
 340         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 341                 IBM_ACPI_EVENT_PREFIX,
 342                 ibm->name);
 343
 344         status = acpi_install_notify_handler(*ibm->acpi->handle,
 345                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 346         if (ACPI_FAILURE(status)) {
 347                 if (status == AE_ALREADY_EXISTS) {
 348                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 349                                 ibm->name);
 350                 } else {
 351                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 352                                 ibm->name, status);
 353                 }
 354                 return -ENODEV;
 355         }
 356         ibm->flags.acpi_notify_installed = 1;
 357         return 0;
 358 }
 359
 360 static int __init tpacpi_device_add(struct acpi_device *device)
 361 {
 362         return 0;
 363 }
 364
 365 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 366 {
 367         int ret;
 368
 369         dbg_printk(TPACPI_DBG_INIT,
 370                 "registering %s as an ACPI driver\n", ibm->name);
 371
 372         BUG_ON(!ibm->acpi);
 373
 374         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 375         if (!ibm->acpi->driver) {
 376                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 377                 return -ENOMEM;
 378         }
 379
 380         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 381         ibm->acpi->driver->ids = ibm->acpi->hid;
 382         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 383
 384         ret = acpi_bus_register_driver(ibm->acpi->driver);
 385         if (ret < 0) {
 386                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 387                        ibm->acpi->hid, ret);
 388                 kfree(ibm->acpi->driver);
 389                 ibm->acpi->driver = NULL;
 390         } else if (!ret)
 391                 ibm->flags.acpi_driver_registered = 1;
 392
 393         return ret;
 394 }
 395
 396
 397 /****************************************************************************
 398  ****************************************************************************
 399  *
 400  * Procfs Helpers
 401  *
 402  ****************************************************************************
 403  ****************************************************************************/
 404
 405 static int dispatch_procfs_read(char *page, char **start, off_t off,
 406                         int count, int *eof, void *data)
 407 {
 408         struct ibm_struct *ibm = data;
 409         int len;
 410
 411         if (!ibm || !ibm->read)
 412                 return -EINVAL;
 413
 414         len = ibm->read(page);
 415         if (len < 0)
 416                 return len;
 417
 418         if (len <= off + count)
 419                 *eof = 1;
 420         *start = page + off;
 421         len -= off;
 422         if (len > count)
 423                 len = count;
 424         if (len < 0)
 425                 len = 0;
 426
 427         return len;
 428 }
 429
 430 static int dispatch_procfs_write(struct file *file,
 431                         const char __user * userbuf,
 432                         unsigned long count, void *data)
 433 {
 434         struct ibm_struct *ibm = data;
 435         char *kernbuf;
 436         int ret;
 437
 438         if (!ibm || !ibm->write)
 439                 return -EINVAL;
 440
 441         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 442         if (!kernbuf)
 443                 return -ENOMEM;
 444
 445         if (copy_from_user(kernbuf, userbuf, count)) {
 446                 kfree(kernbuf);
 447                 return -EFAULT;
 448         }
 449
 450         kernbuf[count] = 0;
 451         strcat(kernbuf, ",");
 452         ret = ibm->write(kernbuf);
 453         if (ret == 0)
 454                 ret = count;
 455
 456         kfree(kernbuf);
 457
 458         return ret;
 459 }
 460
 461 static char *next_cmd(char **cmds)
 462 {
 463         char *start = *cmds;
 464         char *end;
 465
 466         while ((end = strchr(start, ',')) && end == start)
 467                 start = end + 1;
 468
 469         if (!end)
 470                 return NULL;
 471
 472         *end = 0;
 473         *cmds = end + 1;
 474         return start;
 475 }
 476
 477
 478 /****************************************************************************
 479  ****************************************************************************
 480  *
 481  * Device model: hwmon and platform
 482  *
 483  ****************************************************************************
 484  ****************************************************************************/
 485
 486 static struct platform_device *tpacpi_pdev = NULL;
 487 static struct class_device *tpacpi_hwmon = NULL;
 488
 489 static struct platform_driver tpacpi_pdriver = {
 490         .driver = {
 491                 .name = IBM_DRVR_NAME,
 492                 .owner = THIS_MODULE,
 493         },
 494 };
 495
 496
 497 /*************************************************************************
 498  * thinkpad-acpi driver attributes
 499  */
 500
 501 /* interface_version --------------------------------------------------- */
 502 static ssize_t tpacpi_driver_interface_version_show(
 503                                 struct device_driver *drv,
 504                                 char *buf)
 505 {
 506         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 507 }
 508
 509 static DRIVER_ATTR(interface_version, S_IRUGO,
 510                 tpacpi_driver_interface_version_show, NULL);
 511
 512 /* debug_level --------------------------------------------------------- */
 513 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 514                                                 char *buf)
 515 {
 516         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 517 }
 518
 519 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 520                                                 const char *buf, size_t count)
 521 {
 522         unsigned long t;
 523
 524         if (parse_strtoul(buf, 0xffff, &t))
 525                 return -EINVAL;
 526
 527         dbg_level = t;
 528
 529         return count;
 530 }
 531
 532 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 533                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 534
 535 /* version ------------------------------------------------------------- */
 536 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 537                                                 char *buf)
 538 {
 539         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 540 }
 541
 542 static DRIVER_ATTR(version, S_IRUGO,
 543                 tpacpi_driver_version_show, NULL);
 544
 545 /* --------------------------------------------------------------------- */
 546
 547 static struct driver_attribute* tpacpi_driver_attributes[] = {
 548         &driver_attr_debug_level, &driver_attr_version,
 549         &driver_attr_interface_version,
 550 };
 551
 552 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 553 {
 554         int i, res;
 555
 556         i = 0;
 557         res = 0;
 558         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 559                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 560                 i++;
 561         }
 562
 563         return res;
 564 }
 565
 566 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 567 {
 568         int i;
 569
 570         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 571                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 572 }
 573
 574 /*************************************************************************
 575  * sysfs support helpers
 576  */
 577
 578 struct attribute_set_obj {
 579         struct attribute_set s;
 580         struct attribute *a;
 581 } __attribute__((packed));
 582
 583 static struct attribute_set *create_attr_set(unsigned int max_members,
 584                                                 const char* name)
 585 {
 586         struct attribute_set_obj *sobj;
 587
 588         if (max_members == 0)
 589                 return NULL;
 590
 591         /* Allocates space for implicit NULL at the end too */
 592         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 593                     max_members * sizeof(struct attribute *),
 594                     GFP_KERNEL);
 595         if (!sobj)
 596                 return NULL;
 597         sobj->s.max_members = max_members;
 598         sobj->s.group.attrs = &sobj->a;
 599         sobj->s.group.name = name;
 600
 601         return &sobj->s;
 602 }
 603
 604 /* not multi-threaded safe, use it in a single thread per set */
 605 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 606 {
 607         if (!s || !attr)
 608                 return -EINVAL;
 609
 610         if (s->members >= s->max_members)
 611                 return -ENOMEM;
 612
 613         s->group.attrs[s->members] = attr;
 614         s->members++;
 615
 616         return 0;
 617 }
 618
 619 static int add_many_to_attr_set(struct attribute_set* s,
 620                         struct attribute **attr,
 621                         unsigned int count)
 622 {
 623         int i, res;
 624
 625         for (i = 0; i < count; i++) {
 626                 res = add_to_attr_set(s, attr[i]);
 627                 if (res)
 628                         return res;
 629         }
 630
 631         return 0;
 632 }
 633
 634 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 635 {
 636         sysfs_remove_group(kobj, &s->group);
 637         destroy_attr_set(s);
 638 }
 639
 640 static int parse_strtoul(const char *buf,
 641                 unsigned long max, unsigned long *value)
 642 {
 643         char *endp;
 644
 645         *value = simple_strtoul(buf, &endp, 0);
 646         while (*endp && isspace(*endp))
 647                 endp++;
 648         if (*endp || *value > max)
 649                 return -EINVAL;
 650
 651         return 0;
 652 }
 653
 654 /****************************************************************************
 655  ****************************************************************************
 656  *
 657  * Subdrivers
 658  *
 659  ****************************************************************************
 660  ****************************************************************************/
 661
 662 /*************************************************************************
 663  * thinkpad-acpi init subdriver
 664  */
 665
 666 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 667 {
 668         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 669         printk(IBM_INFO "%s\n", IBM_URL);
 670
 671         if (ibm_thinkpad_ec_found)
 672                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 673                        ibm_thinkpad_ec_found);
 674
 675         return 0;
 676 }
 677
 678 static int thinkpad_acpi_driver_read(char *p)
 679 {
 680         int len = 0;
 681
 682         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 683         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 684
 685         return len;
 686 }
 687
 688 static struct ibm_struct thinkpad_acpi_driver_data = {
 689         .name = "driver",
 690         .read = thinkpad_acpi_driver_read,
 691 };
 692
 693 /*************************************************************************
 694  * Hotkey subdriver
 695  */
 696
 697 static int hotkey_orig_status;
 698 static int hotkey_orig_mask;
 699
 700 static int __init hotkey_init(struct ibm_init_struct *iibm)
 701 {
 702         int res;
 703
 704         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 705
 706         IBM_ACPIHANDLE_INIT(hkey);
 707         mutex_init(&hotkey_mutex);
 708
 709         /* hotkey not supported on 570 */
 710         tp_features.hotkey = hkey_handle != NULL;
 711
 712         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 713                 str_supported(tp_features.hotkey));
 714
 715         if (tp_features.hotkey) {
 716                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 717                    A30, R30, R31, T20-22, X20-21, X22-24 */
 718                 tp_features.hotkey_mask =
 719                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 720
 721                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 722                         str_supported(tp_features.hotkey_mask));
 723
 724                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 725                 if (res)
 726                         return res;
 727         }
 728
 729         return (tp_features.hotkey)? 0 : 1;
 730 }
 731
 732 static void hotkey_exit(void)
 733 {
 734         int res;
 735
 736         if (tp_features.hotkey) {
 737                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 738                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 739                 if (res)
 740                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 741         }
 742 }
 743
 744 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 745 {
 746         int hkey;
 747
 748         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 749                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 750         else {
 751                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 752                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 753         }
 754 }
 755
 756 /*
 757  * Call with hotkey_mutex held
 758  */
 759 static int hotkey_get(int *status, int *mask)
 760 {
 761         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 762                 return -EIO;
 763
 764         if (tp_features.hotkey_mask)
 765                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 766                         return -EIO;
 767
 768         return 0;
 769 }
 770
 771 /*
 772  * Call with hotkey_mutex held
 773  */
 774 static int hotkey_set(int status, int mask)
 775 {
 776         int i;
 777
 778         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 779                 return -EIO;
 780
 781         if (tp_features.hotkey_mask)
 782                 for (i = 0; i < 32; i++) {
 783                         int bit = ((1 << i) & mask) != 0;
 784                         if (!acpi_evalf(hkey_handle,
 785                                         NULL, "MHKM", "vdd", i + 1, bit))
 786                                 return -EIO;
 787                 }
 788
 789         return 0;
 790 }
 791
 792 static int hotkey_read(char *p)
 793 {
 794         int res, status, mask;
 795         int len = 0;
 796
 797         if (!tp_features.hotkey) {
 798                 len += sprintf(p + len, "status:\t\tnot supported\n");
 799                 return len;
 800         }
 801
 802         res = mutex_lock_interruptible(&hotkey_mutex);
 803         if (res < 0)
 804                 return res;
 805         res = hotkey_get(&status, &mask);
 806         mutex_unlock(&hotkey_mutex);
 807         if (res)
 808                 return res;
 809
 810         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 811         if (tp_features.hotkey_mask) {
 812                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 813                 len += sprintf(p + len,
 814                                "commands:\tenable, disable, reset, <mask>\n");
 815         } else {
 816                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 817                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 818         }
 819
 820         return len;
 821 }
 822
 823 static int hotkey_write(char *buf)
 824 {
 825         int res, status, mask;
 826         char *cmd;
 827         int do_cmd = 0;
 828
 829         if (!tp_features.hotkey)
 830                 return -ENODEV;
 831
 832         res = mutex_lock_interruptible(&hotkey_mutex);
 833         if (res < 0)
 834                 return res;
 835
 836         res = hotkey_get(&status, &mask);
 837         if (res)
 838                 goto errexit;
 839
 840         res = 0;
 841         while ((cmd = next_cmd(&buf))) {
 842                 if (strlencmp(cmd, "enable") == 0) {
 843                         status = 1;
 844                 } else if (strlencmp(cmd, "disable") == 0) {
 845                         status = 0;
 846                 } else if (strlencmp(cmd, "reset") == 0) {
 847                         status = hotkey_orig_status;
 848                         mask = hotkey_orig_mask;
 849                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 850                         /* mask set */
 851                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 852                         /* mask set */
 853                 } else {
 854                         res = -EINVAL;
 855                         goto errexit;
 856                 }
 857                 do_cmd = 1;
 858         }
 859
 860         if (do_cmd)
 861                 res = hotkey_set(status, mask);
 862
 863 errexit:
 864         mutex_unlock(&hotkey_mutex);
 865         return res;
 866 }
 867
 868 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
 869         .hid = IBM_HKEY_HID,
 870         .notify = hotkey_notify,
 871         .handle = &hkey_handle,
 872         .type = ACPI_DEVICE_NOTIFY,
 873 };
 874
 875 static struct ibm_struct hotkey_driver_data = {
 876         .name = "hotkey",
 877         .read = hotkey_read,
 878         .write = hotkey_write,
 879         .exit = hotkey_exit,
 880         .acpi = &ibm_hotkey_acpidriver,
 881 };
 882
 883 /*************************************************************************
 884  * Bluetooth subdriver
 885  */
 886
 887 static int __init bluetooth_init(struct ibm_init_struct *iibm)
 888 {
 889         int status = 0;
 890
 891         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
 892
 893         IBM_ACPIHANDLE_INIT(hkey);
 894
 895         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 896            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 897         tp_features.bluetooth = hkey_handle &&
 898             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
 899
 900         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
 901                 str_supported(tp_features.bluetooth),
 902                 status);
 903
 904         if (tp_features.bluetooth &&
 905             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
 906                 /* no bluetooth hardware present in system */
 907                 tp_features.bluetooth = 0;
 908                 dbg_printk(TPACPI_DBG_INIT,
 909                            "bluetooth hardware not installed\n");
 910         }
 911
 912         return (tp_features.bluetooth)? 0 : 1;
 913 }
 914
 915 static int bluetooth_get_radiosw(void)
 916 {
 917         int status;
 918
 919         if (!tp_features.bluetooth)
 920                 return -ENODEV;
 921
 922         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 923                 return -EIO;
 924
 925         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
 926 }
 927
 928 static int bluetooth_set_radiosw(int radio_on)
 929 {
 930         int status;
 931
 932         if (!tp_features.bluetooth)
 933                 return -ENODEV;
 934
 935         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 936                 return -EIO;
 937         if (radio_on)
 938                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
 939         else
 940                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
 941         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 942                 return -EIO;
 943
 944         return 0;
 945 }
 946
 947 static int bluetooth_read(char *p)
 948 {
 949         int len = 0;
 950         int status = bluetooth_get_radiosw();
 951
 952         if (!tp_features.bluetooth)
 953                 len += sprintf(p + len, "status:\t\tnot supported\n");
 954         else {
 955                 len += sprintf(p + len, "status:\t\t%s\n",
 956                                 (status)? "enabled" : "disabled");
 957                 len += sprintf(p + len, "commands:\tenable, disable\n");
 958         }
 959
 960         return len;
 961 }
 962
 963 static int bluetooth_write(char *buf)
 964 {
 965         char *cmd;
 966
 967         if (!tp_features.bluetooth)
 968                 return -ENODEV;
 969
 970         while ((cmd = next_cmd(&buf))) {
 971                 if (strlencmp(cmd, "enable") == 0) {
 972                         bluetooth_set_radiosw(1);
 973                 } else if (strlencmp(cmd, "disable") == 0) {
 974                         bluetooth_set_radiosw(0);
 975                 } else
 976                         return -EINVAL;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static struct ibm_struct bluetooth_driver_data = {
 983         .name = "bluetooth",
 984         .read = bluetooth_read,
 985         .write = bluetooth_write,
 986 };
 987
 988 /*************************************************************************
 989  * Wan subdriver
 990  */
 991
 992 static int __init wan_init(struct ibm_init_struct *iibm)
 993 {
 994         int status = 0;
 995
 996         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
 997
 998         IBM_ACPIHANDLE_INIT(hkey);
 999
1000         tp_features.wan = hkey_handle &&
1001             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1002
1003         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1004                 str_supported(tp_features.wan),
1005                 status);
1006
1007         if (tp_features.wan &&
1008             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
1009                 /* no wan hardware present in system */
1010                 tp_features.wan = 0;
1011                 dbg_printk(TPACPI_DBG_INIT,
1012                            "wan hardware not installed\n");
1013         }
1014
1015         return (tp_features.wan)? 0 : 1;
1016 }
1017
1018 static int wan_get_radiosw(void)
1019 {
1020         int status;
1021
1022         if (!tp_features.wan)
1023                 return -ENODEV;
1024
1025         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1026                 return -EIO;
1027
1028         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1029 }
1030
1031 static int wan_set_radiosw(int radio_on)
1032 {
1033         int status;
1034
1035         if (!tp_features.wan)
1036                 return -ENODEV;
1037
1038         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1039                 return -EIO;
1040         if (radio_on)
1041                 status |= TP_ACPI_WANCARD_RADIOSSW;
1042         else
1043                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1044         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1045                 return -EIO;
1046
1047         return 0;
1048 }
1049
1050 static int wan_read(char *p)
1051 {
1052         int len = 0;
1053         int status = wan_get_radiosw();
1054
1055         if (!tp_features.wan)
1056                 len += sprintf(p + len, "status:\t\tnot supported\n");
1057         else {
1058                 len += sprintf(p + len, "status:\t\t%s\n",
1059                                 (status)? "enabled" : "disabled");
1060                 len += sprintf(p + len, "commands:\tenable, disable\n");
1061         }
1062
1063         return len;
1064 }
1065
1066 static int wan_write(char *buf)
1067 {
1068         char *cmd;
1069
1070         if (!tp_features.wan)
1071                 return -ENODEV;
1072
1073         while ((cmd = next_cmd(&buf))) {
1074                 if (strlencmp(cmd, "enable") == 0) {
1075                         wan_set_radiosw(1);
1076                 } else if (strlencmp(cmd, "disable") == 0) {
1077                         wan_set_radiosw(0);
1078                 } else
1079                         return -EINVAL;
1080         }
1081
1082         return 0;
1083 }
1084
1085 static struct ibm_struct wan_driver_data = {
1086         .name = "wan",
1087         .read = wan_read,
1088         .write = wan_write,
1089         .flags.experimental = 1,
1090 };
1091
1092 /*************************************************************************
1093  * Video subdriver
1094  */
1095
1096 static enum video_access_mode video_supported;
1097 static int video_orig_autosw;
1098
1099 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1100            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1101            "\\_SB.PCI0.VID0",   /* 770e */
1102            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1103            "\\_SB.PCI0.AGP.VID",        /* all others */
1104            );                           /* R30, R31 */
1105
1106 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1107
1108 static int __init video_init(struct ibm_init_struct *iibm)
1109 {
1110         int ivga;
1111
1112         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1113
1114         IBM_ACPIHANDLE_INIT(vid);
1115         IBM_ACPIHANDLE_INIT(vid2);
1116
1117         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1118                 /* G41, assume IVGA doesn't change */
1119                 vid_handle = vid2_handle;
1120
1121         if (!vid_handle)
1122                 /* video switching not supported on R30, R31 */
1123                 video_supported = TPACPI_VIDEO_NONE;
1124         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1125                 /* 570 */
1126                 video_supported = TPACPI_VIDEO_570;
1127         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1128                 /* 600e/x, 770e, 770x */
1129                 video_supported = TPACPI_VIDEO_770;
1130         else
1131                 /* all others */
1132                 video_supported = TPACPI_VIDEO_NEW;
1133
1134         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1135                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1136                 video_supported);
1137
1138         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1139 }
1140
1141 static void video_exit(void)
1142 {
1143         dbg_printk(TPACPI_DBG_EXIT,
1144                    "restoring original video autoswitch mode\n");
1145         if (video_autosw_set(video_orig_autosw))
1146                 printk(IBM_ERR "error while trying to restore original "
1147                         "video autoswitch mode\n");
1148 }
1149
1150 static int video_outputsw_get(void)
1151 {
1152         int status = 0;
1153         int i;
1154
1155         switch (video_supported) {
1156         case TPACPI_VIDEO_570:
1157                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1158                                  TP_ACPI_VIDEO_570_PHSCMD))
1159                         return -EIO;
1160                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1161                 break;
1162         case TPACPI_VIDEO_770:
1163                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1164                         return -EIO;
1165                 if (i)
1166                         status |= TP_ACPI_VIDEO_S_LCD;
1167                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1168                         return -EIO;
1169                 if (i)
1170                         status |= TP_ACPI_VIDEO_S_CRT;
1171                 break;
1172         case TPACPI_VIDEO_NEW:
1173                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1174                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1175                         return -EIO;
1176                 if (i)
1177                         status |= TP_ACPI_VIDEO_S_CRT;
1178
1179                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1180                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1181                         return -EIO;
1182                 if (i)
1183                         status |= TP_ACPI_VIDEO_S_LCD;
1184                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1185                         return -EIO;
1186                 if (i)
1187                         status |= TP_ACPI_VIDEO_S_DVI;
1188                 break;
1189         default:
1190                 return -ENOSYS;
1191         }
1192
1193         return status;
1194 }
1195
1196 static int video_outputsw_set(int status)
1197 {
1198         int autosw;
1199         int res = 0;
1200
1201         switch (video_supported) {
1202         case TPACPI_VIDEO_570:
1203                 res = acpi_evalf(NULL, NULL,
1204                                  "\\_SB.PHS2", "vdd",
1205                                  TP_ACPI_VIDEO_570_PHS2CMD,
1206                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1207                 break;
1208         case TPACPI_VIDEO_770:
1209                 autosw = video_autosw_get();
1210                 if (autosw < 0)
1211                         return autosw;
1212
1213                 res = video_autosw_set(1);
1214                 if (res)
1215                         return res;
1216                 res = acpi_evalf(vid_handle, NULL,
1217                                  "ASWT", "vdd", status * 0x100, 0);
1218                 if (!autosw && video_autosw_set(autosw)) {
1219                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1220                         return -EIO;
1221                 }
1222                 break;
1223         case TPACPI_VIDEO_NEW:
1224                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1225                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1226                 break;
1227         default:
1228                 return -ENOSYS;
1229         }
1230
1231         return (res)? 0 : -EIO;
1232 }
1233
1234 static int video_autosw_get(void)
1235 {
1236         int autosw = 0;
1237
1238         switch (video_supported) {
1239         case TPACPI_VIDEO_570:
1240                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1241                         return -EIO;
1242                 break;
1243         case TPACPI_VIDEO_770:
1244         case TPACPI_VIDEO_NEW:
1245                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1246                         return -EIO;
1247                 break;
1248         default:
1249                 return -ENOSYS;
1250         }
1251
1252         return autosw & 1;
1253 }
1254
1255 static int video_autosw_set(int enable)
1256 {
1257         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1258                 return -EIO;
1259         return 0;
1260 }
1261
1262 static int video_outputsw_cycle(void)
1263 {
1264         int autosw = video_autosw_get();
1265         int res;
1266
1267         if (autosw < 0)
1268                 return autosw;
1269
1270         switch (video_supported) {
1271         case TPACPI_VIDEO_570:
1272                 res = video_autosw_set(1);
1273                 if (res)
1274                         return res;
1275                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1276                 break;
1277         case TPACPI_VIDEO_770:
1278         case TPACPI_VIDEO_NEW:
1279                 res = video_autosw_set(1);
1280                 if (res)
1281                         return res;
1282                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1283                 break;
1284         default:
1285                 return -ENOSYS;
1286         }
1287         if (!autosw && video_autosw_set(autosw)) {
1288                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1289                 return -EIO;
1290         }
1291
1292         return (res)? 0 : -EIO;
1293 }
1294
1295 static int video_expand_toggle(void)
1296 {
1297         switch (video_supported) {
1298         case TPACPI_VIDEO_570:
1299                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1300                         0 : -EIO;
1301         case TPACPI_VIDEO_770:
1302                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1303                         0 : -EIO;
1304         case TPACPI_VIDEO_NEW:
1305                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1306                         0 : -EIO;
1307         default:
1308                 return -ENOSYS;
1309         }
1310         /* not reached */
1311 }
1312
1313 static int video_read(char *p)
1314 {
1315         int status, autosw;
1316         int len = 0;
1317
1318         if (video_supported == TPACPI_VIDEO_NONE) {
1319                 len += sprintf(p + len, "status:\t\tnot supported\n");
1320                 return len;
1321         }
1322
1323         status = video_outputsw_get();
1324         if (status < 0)
1325                 return status;
1326
1327         autosw = video_autosw_get();
1328         if (autosw < 0)
1329                 return autosw;
1330
1331         len += sprintf(p + len, "status:\t\tsupported\n");
1332         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1333         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1334         if (video_supported == TPACPI_VIDEO_NEW)
1335                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1336         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1337         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1338         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1339         if (video_supported == TPACPI_VIDEO_NEW)
1340                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1341         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1342         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1343
1344         return len;
1345 }
1346
1347 static int video_write(char *buf)
1348 {
1349         char *cmd;
1350         int enable, disable, status;
1351         int res;
1352
1353         if (video_supported == TPACPI_VIDEO_NONE)
1354                 return -ENODEV;
1355
1356         enable = 0;
1357         disable = 0;
1358
1359         while ((cmd = next_cmd(&buf))) {
1360                 if (strlencmp(cmd, "lcd_enable") == 0) {
1361                         enable |= TP_ACPI_VIDEO_S_LCD;
1362                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1363                         disable |= TP_ACPI_VIDEO_S_LCD;
1364                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1365                         enable |= TP_ACPI_VIDEO_S_CRT;
1366                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1367                         disable |= TP_ACPI_VIDEO_S_CRT;
1368                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1369                            strlencmp(cmd, "dvi_enable") == 0) {
1370                         enable |= TP_ACPI_VIDEO_S_DVI;
1371                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1372                            strlencmp(cmd, "dvi_disable") == 0) {
1373                         disable |= TP_ACPI_VIDEO_S_DVI;
1374                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1375                         res = video_autosw_set(1);
1376                         if (res)
1377                                 return res;
1378                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1379                         res = video_autosw_set(0);
1380                         if (res)
1381                                 return res;
1382                 } else if (strlencmp(cmd, "video_switch") == 0) {
1383                         res = video_outputsw_cycle();
1384                         if (res)
1385                                 return res;
1386                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1387                         res = video_expand_toggle();
1388                         if (res)
1389                                 return res;
1390                 } else
1391                         return -EINVAL;
1392         }
1393
1394         if (enable || disable) {
1395                 status = video_outputsw_get();
1396                 if (status < 0)
1397                         return status;
1398                 res = video_outputsw_set((status & ~disable) | enable);
1399                 if (res)
1400                         return res;
1401         }
1402
1403         return 0;
1404 }
1405
1406 static struct ibm_struct video_driver_data = {
1407         .name = "video",
1408         .read = video_read,
1409         .write = video_write,
1410         .exit = video_exit,
1411 };
1412
1413 /*************************************************************************
1414  * Light (thinklight) subdriver
1415  */
1416
1417 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1418 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1419
1420 static int __init light_init(struct ibm_init_struct *iibm)
1421 {
1422         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1423
1424         IBM_ACPIHANDLE_INIT(ledb);
1425         IBM_ACPIHANDLE_INIT(lght);
1426         IBM_ACPIHANDLE_INIT(cmos);
1427
1428         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1429         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1430
1431         if (tp_features.light)
1432                 /* light status not supported on
1433                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1434                 tp_features.light_status =
1435                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1436
1437         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1438                 str_supported(tp_features.light));
1439
1440         return (tp_features.light)? 0 : 1;
1441 }
1442
1443 static int light_read(char *p)
1444 {
1445         int len = 0;
1446         int status = 0;
1447
1448         if (!tp_features.light) {
1449                 len += sprintf(p + len, "status:\t\tnot supported\n");
1450         } else if (!tp_features.light_status) {
1451                 len += sprintf(p + len, "status:\t\tunknown\n");
1452                 len += sprintf(p + len, "commands:\ton, off\n");
1453         } else {
1454                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1455                         return -EIO;
1456                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1457                 len += sprintf(p + len, "commands:\ton, off\n");
1458         }
1459
1460         return len;
1461 }
1462
1463 static int light_write(char *buf)
1464 {
1465         int cmos_cmd, lght_cmd;
1466         char *cmd;
1467         int success;
1468
1469         if (!tp_features.light)
1470                 return -ENODEV;
1471
1472         while ((cmd = next_cmd(&buf))) {
1473                 if (strlencmp(cmd, "on") == 0) {
1474                         cmos_cmd = 0x0c;
1475                         lght_cmd = 1;
1476                 } else if (strlencmp(cmd, "off") == 0) {
1477                         cmos_cmd = 0x0d;
1478                         lght_cmd = 0;
1479                 } else
1480                         return -EINVAL;
1481
1482                 success = cmos_handle ?
1483                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1484                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1485                 if (!success)
1486                         return -EIO;
1487         }
1488
1489         return 0;
1490 }
1491
1492 static struct ibm_struct light_driver_data = {
1493         .name = "light",
1494         .read = light_read,
1495         .write = light_write,
1496 };
1497
1498 /*************************************************************************
1499  * Dock subdriver
1500  */
1501
1502 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1503
1504 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1505            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1506            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1507            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1508     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1509
1510 /* don't list other alternatives as we install a notify handler on the 570 */
1511 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1512
1513 #define dock_docked() (_sta(dock_handle) & 1)
1514
1515 static int __init dock_init(struct ibm_init_struct *iibm)
1516 {
1517         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1518
1519         IBM_ACPIHANDLE_INIT(dock);
1520         IBM_ACPIHANDLE_INIT(pci);
1521
1522         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1523                 str_supported(dock_handle != NULL));
1524
1525         return (dock_handle)? 0 : 1;
1526 }
1527
1528 static void dock_notify(struct ibm_struct *ibm, u32 event)
1529 {
1530         int docked = dock_docked();
1531         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1532
1533         if (event == 1 && !pci) /* 570 */
1534                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1535         else if (event == 1 && pci)     /* 570 */
1536                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1537         else if (event == 3 && docked)
1538                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1539         else if (event == 3 && !docked)
1540                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1541         else if (event == 0 && docked)
1542                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1543         else {
1544                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1545                        event, _sta(dock_handle));
1546                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1547         }
1548 }
1549
1550 static int dock_read(char *p)
1551 {
1552         int len = 0;
1553         int docked = dock_docked();
1554
1555         if (!dock_handle)
1556                 len += sprintf(p + len, "status:\t\tnot supported\n");
1557         else if (!docked)
1558                 len += sprintf(p + len, "status:\t\tundocked\n");
1559         else {
1560                 len += sprintf(p + len, "status:\t\tdocked\n");
1561                 len += sprintf(p + len, "commands:\tdock, undock\n");
1562         }
1563
1564         return len;
1565 }
1566
1567 static int dock_write(char *buf)
1568 {
1569         char *cmd;
1570
1571         if (!dock_docked())
1572                 return -ENODEV;
1573
1574         while ((cmd = next_cmd(&buf))) {
1575                 if (strlencmp(cmd, "undock") == 0) {
1576                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1577                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1578                                 return -EIO;
1579                 } else if (strlencmp(cmd, "dock") == 0) {
1580                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1581                                 return -EIO;
1582                 } else
1583                         return -EINVAL;
1584         }
1585
1586         return 0;
1587 }
1588
1589 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1590         {
1591          .notify = dock_notify,
1592          .handle = &dock_handle,
1593          .type = ACPI_SYSTEM_NOTIFY,
1594         },
1595         {
1596          .hid = IBM_PCI_HID,
1597          .notify = dock_notify,
1598          .handle = &pci_handle,
1599          .type = ACPI_SYSTEM_NOTIFY,
1600         },
1601 };
1602
1603 static struct ibm_struct dock_driver_data[2] = {
1604         {
1605          .name = "dock",
1606          .read = dock_read,
1607          .write = dock_write,
1608          .acpi = &ibm_dock_acpidriver[0],
1609         },
1610         {
1611          .name = "dock",
1612          .acpi = &ibm_dock_acpidriver[1],
1613         },
1614 };
1615
1616 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1617
1618 /*************************************************************************
1619  * Bay subdriver
1620  */
1621
1622 #ifdef CONFIG_THINKPAD_ACPI_BAY
1623 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1624            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1625            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1626            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1627            );                           /* A21e, R30, R31 */
1628 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1629            "_EJ0",              /* all others */
1630            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1631 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
1632            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1633            );                           /* all others */
1634 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
1635            "_EJ0",                      /* 770x */
1636            );                           /* all others */
1637
1638 static int __init bay_init(struct ibm_init_struct *iibm)
1639 {
1640         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1641
1642         IBM_ACPIHANDLE_INIT(bay);
1643         if (bay_handle)
1644                 IBM_ACPIHANDLE_INIT(bay_ej);
1645         IBM_ACPIHANDLE_INIT(bay2);
1646         if (bay2_handle)
1647                 IBM_ACPIHANDLE_INIT(bay2_ej);
1648
1649         tp_features.bay_status = bay_handle &&
1650                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1651         tp_features.bay_status2 = bay2_handle &&
1652                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1653
1654         tp_features.bay_eject = bay_handle && bay_ej_handle &&
1655                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1656         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1657                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1658
1659         vdbg_printk(TPACPI_DBG_INIT,
1660                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1661                 str_supported(tp_features.bay_status),
1662                 str_supported(tp_features.bay_eject),
1663                 str_supported(tp_features.bay_status2),
1664                 str_supported(tp_features.bay_eject2));
1665
1666         return (tp_features.bay_status || tp_features.bay_eject ||
1667                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1668 }
1669
1670 static void bay_notify(struct ibm_struct *ibm, u32 event)
1671 {
1672         acpi_bus_generate_event(ibm->acpi->device, event, 0);
1673 }
1674
1675 #define bay_occupied(b) (_sta(b##_handle) & 1)
1676
1677 static int bay_read(char *p)
1678 {
1679         int len = 0;
1680         int occupied = bay_occupied(bay);
1681         int occupied2 = bay_occupied(bay2);
1682         int eject, eject2;
1683
1684         len += sprintf(p + len, "status:\t\t%s\n",
1685                 tp_features.bay_status ?
1686                         (occupied ? "occupied" : "unoccupied") :
1687                                 "not supported");
1688         if (tp_features.bay_status2)
1689                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1690                                "occupied" : "unoccupied");
1691
1692         eject = tp_features.bay_eject && occupied;
1693         eject2 = tp_features.bay_eject2 && occupied2;
1694
1695         if (eject && eject2)
1696                 len += sprintf(p + len, "commands:\teject, eject2\n");
1697         else if (eject)
1698                 len += sprintf(p + len, "commands:\teject\n");
1699         else if (eject2)
1700                 len += sprintf(p + len, "commands:\teject2\n");
1701
1702         return len;
1703 }
1704
1705 static int bay_write(char *buf)
1706 {
1707         char *cmd;
1708
1709         if (!tp_features.bay_eject && !tp_features.bay_eject2)
1710                 return -ENODEV;
1711
1712         while ((cmd = next_cmd(&buf))) {
1713                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1714                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1715                                 return -EIO;
1716                 } else if (tp_features.bay_eject2 &&
1717                            strlencmp(cmd, "eject2") == 0) {
1718                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1719                                 return -EIO;
1720                 } else
1721                         return -EINVAL;
1722         }
1723
1724         return 0;
1725 }
1726
1727 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
1728         .notify = bay_notify,
1729         .handle = &bay_handle,
1730         .type = ACPI_SYSTEM_NOTIFY,
1731 };
1732
1733 static struct ibm_struct bay_driver_data = {
1734         .name = "bay",
1735         .read = bay_read,
1736         .write = bay_write,
1737         .acpi = &ibm_bay_acpidriver,
1738 };
1739
1740 #endif /* CONFIG_THINKPAD_ACPI_BAY */
1741
1742 /*************************************************************************
1743  * CMOS subdriver
1744  */
1745
1746 /* sysfs cmos_command -------------------------------------------------- */
1747 static ssize_t cmos_command_store(struct device *dev,
1748                             struct device_attribute *attr,
1749                             const char *buf, size_t count)
1750 {
1751         unsigned long cmos_cmd;
1752         int res;
1753
1754         if (parse_strtoul(buf, 21, &cmos_cmd))
1755                 return -EINVAL;
1756
1757         res = issue_thinkpad_cmos_command(cmos_cmd);
1758         return (res)? res : count;
1759 }
1760
1761 static struct device_attribute dev_attr_cmos_command =
1762         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
1763
1764 /* --------------------------------------------------------------------- */
1765
1766 static int __init cmos_init(struct ibm_init_struct *iibm)
1767 {
1768         int res;
1769
1770         vdbg_printk(TPACPI_DBG_INIT,
1771                 "initializing cmos commands subdriver\n");
1772
1773         IBM_ACPIHANDLE_INIT(cmos);
1774
1775         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
1776                 str_supported(cmos_handle != NULL));
1777
1778         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1779         if (res)
1780                 return res;
1781
1782         return (cmos_handle)? 0 : 1;
1783 }
1784
1785 static void cmos_exit(void)
1786 {
1787         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
1788 }
1789
1790 static int cmos_read(char *p)
1791 {
1792         int len = 0;
1793
1794         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1795            R30, R31, T20-22, X20-21 */
1796         if (!cmos_handle)
1797                 len += sprintf(p + len, "status:\t\tnot supported\n");
1798         else {
1799                 len += sprintf(p + len, "status:\t\tsupported\n");
1800                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
1801         }
1802
1803         return len;
1804 }
1805
1806 static int cmos_write(char *buf)
1807 {
1808         char *cmd;
1809         int cmos_cmd, res;
1810
1811         while ((cmd = next_cmd(&buf))) {
1812                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1813                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1814                         /* cmos_cmd set */
1815                 } else
1816                         return -EINVAL;
1817
1818                 res = issue_thinkpad_cmos_command(cmos_cmd);
1819                 if (res)
1820                         return res;
1821         }
1822
1823         return 0;
1824 }
1825
1826 static struct ibm_struct cmos_driver_data = {
1827         .name = "cmos",
1828         .read = cmos_read,
1829         .write = cmos_write,
1830         .exit = cmos_exit,
1831 };
1832
1833 /*************************************************************************
1834  * LED subdriver
1835  */
1836
1837 static enum led_access_mode led_supported;
1838
1839 IBM_HANDLE(led, ec, "SLED",     /* 570 */
1840            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1841            "LED",               /* all others */
1842            );                   /* R30, R31 */
1843
1844 static int __init led_init(struct ibm_init_struct *iibm)
1845 {
1846         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
1847
1848         IBM_ACPIHANDLE_INIT(led);
1849
1850         if (!led_handle)
1851                 /* led not supported on R30, R31 */
1852                 led_supported = TPACPI_LED_NONE;
1853         else if (strlencmp(led_path, "SLED") == 0)
1854                 /* 570 */
1855                 led_supported = TPACPI_LED_570;
1856         else if (strlencmp(led_path, "SYSL") == 0)
1857                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1858                 led_supported = TPACPI_LED_OLD;
1859         else
1860                 /* all others */
1861                 led_supported = TPACPI_LED_NEW;
1862
1863         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
1864                 str_supported(led_supported), led_supported);
1865
1866         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
1867 }
1868
1869 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1870
1871 static int led_read(char *p)
1872 {
1873         int len = 0;
1874
1875         if (!led_supported) {
1876                 len += sprintf(p + len, "status:\t\tnot supported\n");
1877                 return len;
1878         }
1879         len += sprintf(p + len, "status:\t\tsupported\n");
1880
1881         if (led_supported == TPACPI_LED_570) {
1882                 /* 570 */
1883                 int i, status;
1884                 for (i = 0; i < 8; i++) {
1885                         if (!acpi_evalf(ec_handle,
1886                                         &status, "GLED", "dd", 1 << i))
1887                                 return -EIO;
1888                         len += sprintf(p + len, "%d:\t\t%s\n",
1889                                        i, led_status(status));
1890                 }
1891         }
1892
1893         len += sprintf(p + len, "commands:\t"
1894                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1895
1896         return len;
1897 }
1898
1899 /* off, on, blink */
1900 static const int led_sled_arg1[] = { 0, 1, 3 };
1901 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1902 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1903 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1904
1905 static int led_write(char *buf)
1906 {
1907         char *cmd;
1908         int led, ind, ret;
1909
1910         if (!led_supported)
1911                 return -ENODEV;
1912
1913         while ((cmd = next_cmd(&buf))) {
1914                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1915                         return -EINVAL;
1916
1917                 if (strstr(cmd, "off")) {
1918                         ind = 0;
1919                 } else if (strstr(cmd, "on")) {
1920                         ind = 1;
1921                 } else if (strstr(cmd, "blink")) {
1922                         ind = 2;
1923                 } else
1924                         return -EINVAL;
1925
1926                 if (led_supported == TPACPI_LED_570) {
1927                         /* 570 */
1928                         led = 1 << led;
1929                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1930                                         led, led_sled_arg1[ind]))
1931                                 return -EIO;
1932                 } else if (led_supported == TPACPI_LED_OLD) {
1933                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1934                         led = 1 << led;
1935                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
1936                         if (ret >= 0)
1937                                 ret =
1938                                     ec_write(TPACPI_LED_EC_HLBL,
1939                                              led * led_exp_hlbl[ind]);
1940                         if (ret >= 0)
1941                                 ret =
1942                                     ec_write(TPACPI_LED_EC_HLCL,
1943                                              led * led_exp_hlcl[ind]);
1944                         if (ret < 0)
1945                                 return ret;
1946                 } else {
1947                         /* all others */
1948                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1949                                         led, led_led_arg1[ind]))
1950                                 return -EIO;
1951                 }
1952         }
1953
1954         return 0;
1955 }
1956
1957 static struct ibm_struct led_driver_data = {
1958         .name = "led",
1959         .read = led_read,
1960         .write = led_write,
1961 };
1962
1963 /*************************************************************************
1964  * Beep subdriver
1965  */
1966
1967 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
1968
1969 static int __init beep_init(struct ibm_init_struct *iibm)
1970 {
1971         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
1972
1973         IBM_ACPIHANDLE_INIT(beep);
1974
1975         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
1976                 str_supported(beep_handle != NULL));
1977
1978         return (beep_handle)? 0 : 1;
1979 }
1980
1981 static int beep_read(char *p)
1982 {
1983         int len = 0;
1984
1985         if (!beep_handle)
1986                 len += sprintf(p + len, "status:\t\tnot supported\n");
1987         else {
1988                 len += sprintf(p + len, "status:\t\tsupported\n");
1989                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1990         }
1991
1992         return len;
1993 }
1994
1995 static int beep_write(char *buf)
1996 {
1997         char *cmd;
1998         int beep_cmd;
1999
2000         if (!beep_handle)
2001                 return -ENODEV;
2002
2003         while ((cmd = next_cmd(&buf))) {
2004                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2005                     beep_cmd >= 0 && beep_cmd <= 17) {
2006                         /* beep_cmd set */
2007                 } else
2008                         return -EINVAL;
2009                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2010                         return -EIO;
2011         }
2012
2013         return 0;
2014 }
2015
2016 static struct ibm_struct beep_driver_data = {
2017         .name = "beep",
2018         .read = beep_read,
2019         .write = beep_write,
2020 };
2021
2022 /*************************************************************************
2023  * Thermal subdriver
2024  */
2025
2026 static enum thermal_access_mode thermal_read_mode;
2027
2028 /* sysfs temp##_input -------------------------------------------------- */
2029
2030 static ssize_t thermal_temp_input_show(struct device *dev,
2031                            struct device_attribute *attr,
2032                            char *buf)
2033 {
2034         struct sensor_device_attribute *sensor_attr =
2035                                         to_sensor_dev_attr(attr);
2036         int idx = sensor_attr->index;
2037         s32 value;
2038         int res;
2039
2040         res = thermal_get_sensor(idx, &value);
2041         if (res)
2042                 return res;
2043         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2044                 return -ENXIO;
2045
2046         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2047 }
2048
2049 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2050          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2051
2052 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2053         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2054         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2055         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2056         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2057         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2058         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2059         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2060         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2061         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2062         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2063         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2064         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2065         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2066         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2067         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2068         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2069 };
2070
2071 #define THERMAL_ATTRS(X) \
2072         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2073
2074 static struct attribute *thermal_temp_input_attr[] = {
2075         THERMAL_ATTRS(8),
2076         THERMAL_ATTRS(9),
2077         THERMAL_ATTRS(10),
2078         THERMAL_ATTRS(11),
2079         THERMAL_ATTRS(12),
2080         THERMAL_ATTRS(13),
2081         THERMAL_ATTRS(14),
2082         THERMAL_ATTRS(15),
2083         THERMAL_ATTRS(0),
2084         THERMAL_ATTRS(1),
2085         THERMAL_ATTRS(2),
2086         THERMAL_ATTRS(3),
2087         THERMAL_ATTRS(4),
2088         THERMAL_ATTRS(5),
2089         THERMAL_ATTRS(6),
2090         THERMAL_ATTRS(7),
2091         NULL
2092 };
2093
2094 static const struct attribute_group thermal_temp_input16_group = {
2095         .attrs = thermal_temp_input_attr
2096 };
2097
2098 static const struct attribute_group thermal_temp_input8_group = {
2099         .attrs = &thermal_temp_input_attr[8]
2100 };
2101
2102 #undef THERMAL_SENSOR_ATTR_TEMP
2103 #undef THERMAL_ATTRS
2104
2105 /* --------------------------------------------------------------------- */
2106
2107 static int __init thermal_init(struct ibm_init_struct *iibm)
2108 {
2109         u8 t, ta1, ta2;
2110         int i;
2111         int acpi_tmp7;
2112         int res;
2113
2114         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2115
2116         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2117
2118         if (ibm_thinkpad_ec_found && experimental) {
2119                 /*
2120                  * Direct EC access mode: sensors at registers
2121                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2122                  * non-implemented, thermal sensors return 0x80 when
2123                  * not available
2124                  */
2125
2126                 ta1 = ta2 = 0;
2127                 for (i = 0; i < 8; i++) {
2128                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2129                                 ta1 |= t;
2130                         } else {
2131                                 ta1 = 0;
2132                                 break;
2133                         }
2134                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2135                                 ta2 |= t;
2136                         } else {
2137                                 ta1 = 0;
2138                                 break;
2139                         }
2140                 }
2141                 if (ta1 == 0) {
2142                         /* This is sheer paranoia, but we handle it anyway */
2143                         if (acpi_tmp7) {
2144                                 printk(IBM_ERR
2145                                        "ThinkPad ACPI EC access misbehaving, "
2146                                        "falling back to ACPI TMPx access mode\n");
2147                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2148                         } else {
2149                                 printk(IBM_ERR
2150                                        "ThinkPad ACPI EC access misbehaving, "
2151                                        "disabling thermal sensors access\n");
2152                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2153                         }
2154                 } else {
2155                         thermal_read_mode =
2156                             (ta2 != 0) ?
2157                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2158                 }
2159         } else if (acpi_tmp7) {
2160                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2161                         /* 600e/x, 770e, 770x */
2162                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2163                 } else {
2164                         /* Standard ACPI TMPx access, max 8 sensors */
2165                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2166                 }
2167         } else {
2168                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2169                 thermal_read_mode = TPACPI_THERMAL_NONE;
2170         }
2171
2172         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2173                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2174                 thermal_read_mode);
2175
2176         switch(thermal_read_mode) {
2177         case TPACPI_THERMAL_TPEC_16:
2178                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2179                                 &thermal_temp_input16_group);
2180                 if (res)
2181                         return res;
2182                 break;
2183         case TPACPI_THERMAL_TPEC_8:
2184         case TPACPI_THERMAL_ACPI_TMP07:
2185         case TPACPI_THERMAL_ACPI_UPDT:
2186                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2187                                 &thermal_temp_input8_group);
2188                 if (res)
2189                         return res;
2190                 break;
2191         case TPACPI_THERMAL_NONE:
2192         default:
2193                 return 1;
2194         }
2195
2196         return 0;
2197 }
2198
2199 static void thermal_exit(void)
2200 {
2201         switch(thermal_read_mode) {
2202         case TPACPI_THERMAL_TPEC_16:
2203                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2204                                    &thermal_temp_input16_group);
2205                 break;
2206         case TPACPI_THERMAL_TPEC_8:
2207         case TPACPI_THERMAL_ACPI_TMP07:
2208         case TPACPI_THERMAL_ACPI_UPDT:
2209                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2210                                    &thermal_temp_input16_group);
2211                 break;
2212         case TPACPI_THERMAL_NONE:
2213         default:
2214                 break;
2215         }
2216 }
2217
2218 /* idx is zero-based */
2219 static int thermal_get_sensor(int idx, s32 *value)
2220 {
2221         int t;
2222         s8 tmp;
2223         char tmpi[5];
2224
2225         t = TP_EC_THERMAL_TMP0;
2226
2227         switch (thermal_read_mode) {
2228 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2229         case TPACPI_THERMAL_TPEC_16:
2230                 if (idx >= 8 && idx <= 15) {
2231                         t = TP_EC_THERMAL_TMP8;
2232                         idx -= 8;
2233                 }
2234                 /* fallthrough */
2235 #endif
2236         case TPACPI_THERMAL_TPEC_8:
2237                 if (idx <= 7) {
2238                         if (!acpi_ec_read(t + idx, &tmp))
2239                                 return -EIO;
2240                         *value = tmp * 1000;
2241                         return 0;
2242                 }
2243                 break;
2244
2245         case TPACPI_THERMAL_ACPI_UPDT:
2246                 if (idx <= 7) {
2247                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2248                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2249                                 return -EIO;
2250                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2251                                 return -EIO;
2252                         *value = (t - 2732) * 100;
2253                         return 0;
2254                 }
2255                 break;
2256
2257         case TPACPI_THERMAL_ACPI_TMP07:
2258                 if (idx <= 7) {
2259                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2260                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2261                                 return -EIO;
2262                         *value = t * 1000;
2263                         return 0;
2264                 }
2265                 break;
2266
2267         case TPACPI_THERMAL_NONE:
2268         default:
2269                 return -ENOSYS;
2270         }
2271
2272         return -EINVAL;
2273 }
2274
2275 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2276 {
2277         int res, i;
2278         int n;
2279
2280         n = 8;
2281         i = 0;
2282
2283         if (!s)
2284                 return -EINVAL;
2285
2286         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2287                 n = 16;
2288
2289         for(i = 0 ; i < n; i++) {
2290                 res = thermal_get_sensor(i, &s->temp[i]);
2291                 if (res)
2292                         return res;
2293         }
2294
2295         return n;
2296 }
2297
2298 static int thermal_read(char *p)
2299 {
2300         int len = 0;
2301         int n, i;
2302         struct ibm_thermal_sensors_struct t;
2303
2304         n = thermal_get_sensors(&t);
2305         if (unlikely(n < 0))
2306                 return n;
2307
2308         len += sprintf(p + len, "temperatures:\t");
2309
2310         if (n > 0) {
2311                 for (i = 0; i < (n - 1); i++)
2312                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2313                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2314         } else
2315                 len += sprintf(p + len, "not supported\n");
2316
2317         return len;
2318 }
2319
2320 static struct ibm_struct thermal_driver_data = {
2321         .name = "thermal",
2322         .read = thermal_read,
2323         .exit = thermal_exit,
2324 };
2325
2326 /*************************************************************************
2327  * EC Dump subdriver
2328  */
2329
2330 static u8 ecdump_regs[256];
2331
2332 static int ecdump_read(char *p)
2333 {
2334         int len = 0;
2335         int i, j;
2336         u8 v;
2337
2338         len += sprintf(p + len, "EC      "
2339                        " +00 +01 +02 +03 +04 +05 +06 +07"
2340                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2341         for (i = 0; i < 256; i += 16) {
2342                 len += sprintf(p + len, "EC 0x%02x:", i);
2343                 for (j = 0; j < 16; j++) {
2344                         if (!acpi_ec_read(i + j, &v))
2345                                 break;
2346                         if (v != ecdump_regs[i + j])
2347                                 len += sprintf(p + len, " *%02x", v);
2348                         else
2349                                 len += sprintf(p + len, "  %02x", v);
2350                         ecdump_regs[i + j] = v;
2351                 }
2352                 len += sprintf(p + len, "\n");
2353                 if (j != 16)
2354                         break;
2355         }
2356
2357         /* These are way too dangerous to advertise openly... */
2358 #if 0
2359         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2360                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2361         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2362                        " (<offset> is 00-ff, <value> is 0-255)\n");
2363 #endif
2364         return len;
2365 }
2366
2367 static int ecdump_write(char *buf)
2368 {
2369         char *cmd;
2370         int i, v;
2371
2372         while ((cmd = next_cmd(&buf))) {
2373                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2374                         /* i and v set */
2375                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2376                         /* i and v set */
2377                 } else
2378                         return -EINVAL;
2379                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2380                         if (!acpi_ec_write(i, v))
2381                                 return -EIO;
2382                 } else
2383                         return -EINVAL;
2384         }
2385
2386         return 0;
2387 }
2388
2389 static struct ibm_struct ecdump_driver_data = {
2390         .name = "ecdump",
2391         .read = ecdump_read,
2392         .write = ecdump_write,
2393         .flags.experimental = 1,
2394 };
2395
2396 /*************************************************************************
2397  * Backlight/brightness subdriver
2398  */
2399
2400 static struct backlight_device *ibm_backlight_device = NULL;
2401
2402 static struct backlight_ops ibm_backlight_data = {
2403         .get_brightness = brightness_get,
2404         .update_status  = brightness_update_status,
2405 };
2406
2407 static int __init brightness_init(struct ibm_init_struct *iibm)
2408 {
2409         int b;
2410
2411         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2412
2413         b = brightness_get(NULL);
2414         if (b < 0)
2415                 return b;
2416
2417         ibm_backlight_device = backlight_device_register(
2418                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2419                                         &ibm_backlight_data);
2420         if (IS_ERR(ibm_backlight_device)) {
2421                 printk(IBM_ERR "Could not register backlight device\n");
2422                 return PTR_ERR(ibm_backlight_device);
2423         }
2424         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2425
2426         ibm_backlight_device->props.max_brightness = 7;
2427         ibm_backlight_device->props.brightness = b;
2428         backlight_update_status(ibm_backlight_device);
2429
2430         return 0;
2431 }
2432
2433 static void brightness_exit(void)
2434 {
2435         if (ibm_backlight_device) {
2436                 vdbg_printk(TPACPI_DBG_EXIT,
2437                             "calling backlight_device_unregister()\n");
2438                 backlight_device_unregister(ibm_backlight_device);
2439                 ibm_backlight_device = NULL;
2440         }
2441 }
2442
2443 static int brightness_update_status(struct backlight_device *bd)
2444 {
2445         return brightness_set(
2446                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2447                  bd->props.power == FB_BLANK_UNBLANK) ?
2448                                 bd->props.brightness : 0);
2449 }
2450
2451 static int brightness_get(struct backlight_device *bd)
2452 {
2453         u8 level;
2454         if (!acpi_ec_read(brightness_offset, &level))
2455                 return -EIO;
2456
2457         level &= 0x7;
2458
2459         return level;
2460 }
2461
2462 static int brightness_set(int value)
2463 {
2464         int cmos_cmd, inc, i;
2465         int current_value = brightness_get(NULL);
2466
2467         value &= 7;
2468
2469         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2470         inc = value > current_value ? 1 : -1;
2471         for (i = current_value; i != value; i += inc) {
2472                 if (issue_thinkpad_cmos_command(cmos_cmd))
2473                         return -EIO;
2474                 if (!acpi_ec_write(brightness_offset, i + inc))
2475                         return -EIO;
2476         }
2477
2478         return 0;
2479 }
2480
2481 static int brightness_read(char *p)
2482 {
2483         int len = 0;
2484         int level;
2485
2486         if ((level = brightness_get(NULL)) < 0) {
2487                 len += sprintf(p + len, "level:\t\tunreadable\n");
2488         } else {
2489                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2490                 len += sprintf(p + len, "commands:\tup, down\n");
2491                 len += sprintf(p + len, "commands:\tlevel <level>"
2492                                " (<level> is 0-7)\n");
2493         }
2494
2495         return len;
2496 }
2497
2498 static int brightness_write(char *buf)
2499 {
2500         int level;
2501         int new_level;
2502         char *cmd;
2503
2504         while ((cmd = next_cmd(&buf))) {
2505                 if ((level = brightness_get(NULL)) < 0)
2506                         return level;
2507                 level &= 7;
2508
2509                 if (strlencmp(cmd, "up") == 0) {
2510                         new_level = level == 7 ? 7 : level + 1;
2511                 } else if (strlencmp(cmd, "down") == 0) {
2512                         new_level = level == 0 ? 0 : level - 1;
2513                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2514                            new_level >= 0 && new_level <= 7) {
2515                         /* new_level set */
2516                 } else
2517                         return -EINVAL;
2518
2519                 brightness_set(new_level);
2520         }
2521
2522         return 0;
2523 }
2524
2525 static struct ibm_struct brightness_driver_data = {
2526         .name = "brightness",
2527         .read = brightness_read,
2528         .write = brightness_write,
2529         .exit = brightness_exit,
2530 };
2531
2532 /*************************************************************************
2533  * Volume subdriver
2534  */
2535
2536 static int volume_read(char *p)
2537 {
2538         int len = 0;
2539         u8 level;
2540
2541         if (!acpi_ec_read(volume_offset, &level)) {
2542                 len += sprintf(p + len, "level:\t\tunreadable\n");
2543         } else {
2544                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2545                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2546                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2547                 len += sprintf(p + len, "commands:\tlevel <level>"
2548                                " (<level> is 0-15)\n");
2549         }
2550
2551         return len;
2552 }
2553
2554 static int volume_write(char *buf)
2555 {
2556         int cmos_cmd, inc, i;
2557         u8 level, mute;
2558         int new_level, new_mute;
2559         char *cmd;
2560
2561         while ((cmd = next_cmd(&buf))) {
2562                 if (!acpi_ec_read(volume_offset, &level))
2563                         return -EIO;
2564                 new_mute = mute = level & 0x40;
2565                 new_level = level = level & 0xf;
2566
2567                 if (strlencmp(cmd, "up") == 0) {
2568                         if (mute)
2569                                 new_mute = 0;
2570                         else
2571                                 new_level = level == 15 ? 15 : level + 1;
2572                 } else if (strlencmp(cmd, "down") == 0) {
2573                         if (mute)
2574                                 new_mute = 0;
2575                         else
2576                                 new_level = level == 0 ? 0 : level - 1;
2577                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2578                            new_level >= 0 && new_level <= 15) {
2579                         /* new_level set */
2580                 } else if (strlencmp(cmd, "mute") == 0) {
2581                         new_mute = 0x40;
2582                 } else
2583                         return -EINVAL;
2584
2585                 if (new_level != level) {       /* mute doesn't change */
2586                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2587                         inc = new_level > level ? 1 : -1;
2588
2589                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2590                                      !acpi_ec_write(volume_offset, level)))
2591                                 return -EIO;
2592
2593                         for (i = level; i != new_level; i += inc)
2594                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2595                                     !acpi_ec_write(volume_offset, i + inc))
2596                                         return -EIO;
2597
2598                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2599                                      !acpi_ec_write(volume_offset,
2600                                                     new_level + mute)))
2601                                 return -EIO;
2602                 }
2603
2604                 if (new_mute != mute) { /* level doesn't change */
2605                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2606
2607                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
2608                             !acpi_ec_write(volume_offset, level + new_mute))
2609                                 return -EIO;
2610                 }
2611         }
2612
2613         return 0;
2614 }
2615
2616 static struct ibm_struct volume_driver_data = {
2617         .name = "volume",
2618         .read = volume_read,
2619         .write = volume_write,
2620 };
2621
2622 /*************************************************************************
2623  * Fan subdriver
2624  */
2625
2626 /*
2627  * FAN ACCESS MODES
2628  *
2629  * TPACPI_FAN_RD_ACPI_GFAN:
2630  *      ACPI GFAN method: returns fan level
2631  *
2632  *      see TPACPI_FAN_WR_ACPI_SFAN
2633  *      EC 0x2f (HFSP) not available if GFAN exists
2634  *
2635  * TPACPI_FAN_WR_ACPI_SFAN:
2636  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2637  *
2638  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
2639  *      it for writing.
2640  *
2641  * TPACPI_FAN_WR_TPEC:
2642  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
2643  *      Supported on almost all ThinkPads
2644  *
2645  *      Fan speed changes of any sort (including those caused by the
2646  *      disengaged mode) are usually done slowly by the firmware as the
2647  *      maximum ammount of fan duty cycle change per second seems to be
2648  *      limited.
2649  *
2650  *      Reading is not available if GFAN exists.
2651  *      Writing is not available if SFAN exists.
2652  *
2653  *      Bits
2654  *       7      automatic mode engaged;
2655  *              (default operation mode of the ThinkPad)
2656  *              fan level is ignored in this mode.
2657  *       6      full speed mode (takes precedence over bit 7);
2658  *              not available on all thinkpads.  May disable
2659  *              the tachometer while the fan controller ramps up
2660  *              the speed (which can take up to a few *minutes*).
2661  *              Speeds up fan to 100% duty-cycle, which is far above
2662  *              the standard RPM levels.  It is not impossible that
2663  *              it could cause hardware damage.
2664  *      5-3     unused in some models.  Extra bits for fan level
2665  *              in others, but still useless as all values above
2666  *              7 map to the same speed as level 7 in these models.
2667  *      2-0     fan level (0..7 usually)
2668  *                      0x00 = stop
2669  *                      0x07 = max (set when temperatures critical)
2670  *              Some ThinkPads may have other levels, see
2671  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2672  *
2673  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2674  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2675  *      does so, its initial value is meaningless (0x07).
2676  *
2677  *      For firmware bugs, refer to:
2678  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2679  *
2680  *      ----
2681  *
2682  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2683  *      Main fan tachometer reading (in RPM)
2684  *
2685  *      This register is present on all ThinkPads with a new-style EC, and
2686  *      it is known not to be present on the A21m/e, and T22, as there is
2687  *      something else in offset 0x84 according to the ACPI DSDT.  Other
2688  *      ThinkPads from this same time period (and earlier) probably lack the
2689  *      tachometer as well.
2690  *
2691  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2692  *      was never fixed by IBM to report the EC firmware version string
2693  *      probably support the tachometer (like the early X models), so
2694  *      detecting it is quite hard.  We need more data to know for sure.
2695  *
2696  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2697  *      might result.
2698  *
2699  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
2700  *      mode.
2701  *
2702  *      For firmware bugs, refer to:
2703  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2704  *
2705  * TPACPI_FAN_WR_ACPI_FANS:
2706  *      ThinkPad X31, X40, X41.  Not available in the X60.
2707  *
2708  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
2709  *      high speed.  ACPI DSDT seems to map these three speeds to levels
2710  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2711  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2712  *
2713  *      The speeds are stored on handles
2714  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2715  *
2716  *      There are three default speed sets, acessible as handles:
2717  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2718  *
2719  *      ACPI DSDT switches which set is in use depending on various
2720  *      factors.
2721  *
2722  *      TPACPI_FAN_WR_TPEC is also available and should be used to
2723  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
2724  *      but the ACPI tables just mention level 7.
2725  */
2726
2727 static enum fan_status_access_mode fan_status_access_mode;
2728 static enum fan_control_access_mode fan_control_access_mode;
2729 static enum fan_control_commands fan_control_commands;
2730
2731 static u8 fan_control_initial_status;
2732 static u8 fan_control_desired_level;
2733
2734 static void fan_watchdog_fire(struct work_struct *ignored);
2735 static int fan_watchdog_maxinterval;
2736 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
2737
2738 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
2739 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
2740            "\\FSPD",            /* 600e/x, 770e, 770x */
2741            );                   /* all others */
2742 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
2743            "JFNS",              /* 770x-JL */
2744            );                   /* all others */
2745
2746 /*
2747  * SYSFS fan layout: hwmon compatible (device)
2748  *
2749  * pwm*_enable:
2750  *      0: "disengaged" mode
2751  *      1: manual mode
2752  *      2: native EC "auto" mode (recommended, hardware default)
2753  *
2754  * pwm*: set speed in manual mode, ignored otherwise.
2755  *      0 is level 0; 255 is level 7. Intermediate points done with linear
2756  *      interpolation.
2757  *
2758  * fan*_input: tachometer reading, RPM
2759  *
2760  *
2761  * SYSFS fan layout: extensions
2762  *
2763  * fan_watchdog (driver):
2764  *      fan watchdog interval in seconds, 0 disables (default), max 120
2765  */
2766
2767 /* sysfs fan pwm1_enable ----------------------------------------------- */
2768 static ssize_t fan_pwm1_enable_show(struct device *dev,
2769                                     struct device_attribute *attr,
2770                                     char *buf)
2771 {
2772         int res, mode;
2773         u8 status;
2774
2775         res = fan_get_status_safe(&status);
2776         if (res)
2777                 return res;
2778
2779         if (unlikely(tp_features.fan_ctrl_status_undef)) {
2780                 if (status != fan_control_initial_status) {
2781                         tp_features.fan_ctrl_status_undef = 0;
2782                 } else {
2783                         /* Return most likely status. In fact, it
2784                          * might be the only possible status */
2785                         status = TP_EC_FAN_AUTO;
2786                 }
2787         }
2788
2789         if (status & TP_EC_FAN_FULLSPEED) {
2790                 mode = 0;
2791         } else if (status & TP_EC_FAN_AUTO) {
2792                 mode = 2;
2793         } else
2794                 mode = 1;
2795
2796         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
2797 }
2798
2799 static ssize_t fan_pwm1_enable_store(struct device *dev,
2800                                      struct device_attribute *attr,
2801                                      const char *buf, size_t count)
2802 {
2803         unsigned long t;
2804         int res, level;
2805
2806         if (parse_strtoul(buf, 2, &t))
2807                 return -EINVAL;
2808
2809         switch (t) {
2810         case 0:
2811                 level = TP_EC_FAN_FULLSPEED;
2812                 break;
2813         case 1:
2814                 level = TPACPI_FAN_LAST_LEVEL;
2815                 break;
2816         case 2:
2817                 level = TP_EC_FAN_AUTO;
2818                 break;
2819         case 3:
2820                 /* reserved for software-controlled auto mode */
2821                 return -ENOSYS;
2822         default:
2823                 return -EINVAL;
2824         }
2825
2826         res = fan_set_level_safe(level);
2827         if (res == -ENXIO)
2828                 return -EINVAL;
2829         else if (res < 0)
2830                 return res;
2831
2832         fan_watchdog_reset();
2833
2834         return count;
2835 }
2836
2837 static struct device_attribute dev_attr_fan_pwm1_enable =
2838         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
2839                 fan_pwm1_enable_show, fan_pwm1_enable_store);
2840
2841 /* sysfs fan pwm1 ------------------------------------------------------ */
2842 static ssize_t fan_pwm1_show(struct device *dev,
2843                              struct device_attribute *attr,
2844                              char *buf)
2845 {
2846         int res;
2847         u8 status;
2848
2849         res = fan_get_status_safe(&status);
2850         if (res)
2851                 return res;
2852
2853         if (unlikely(tp_features.fan_ctrl_status_undef)) {
2854                 if (status != fan_control_initial_status) {
2855                         tp_features.fan_ctrl_status_undef = 0;
2856                 } else {
2857                         status = TP_EC_FAN_AUTO;
2858                 }
2859         }
2860
2861         if ((status &
2862              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
2863                 status = fan_control_desired_level;
2864
2865         if (status > 7)
2866                 status = 7;
2867
2868         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
2869 }
2870
2871 static ssize_t fan_pwm1_store(struct device *dev,
2872                               struct device_attribute *attr,
2873                               const char *buf, size_t count)
2874 {
2875         unsigned long s;
2876         int rc;
2877         u8 status, newlevel;
2878
2879         if (parse_strtoul(buf, 255, &s))
2880                 return -EINVAL;
2881
2882         /* scale down from 0-255 to 0-7 */
2883         newlevel = (s >> 5) & 0x07;
2884
2885         rc = mutex_lock_interruptible(&fan_mutex);
2886         if (rc < 0)
2887                 return rc;
2888
2889         rc = fan_get_status(&status);
2890         if (!rc && (status &
2891                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
2892                 rc = fan_set_level(newlevel);
2893                 if (rc == -ENXIO)
2894                         rc = -EINVAL;
2895                 else if (!rc) {
2896                         fan_update_desired_level(newlevel);
2897                         fan_watchdog_reset();
2898                 }
2899         }
2900
2901         mutex_unlock(&fan_mutex);
2902         return (rc)? rc : count;
2903 }
2904
2905 static struct device_attribute dev_attr_fan_pwm1 =
2906         __ATTR(pwm1, S_IWUSR | S_IRUGO,
2907                 fan_pwm1_show, fan_pwm1_store);
2908
2909 /* sysfs fan fan1_input ------------------------------------------------ */
2910 static ssize_t fan_fan1_input_show(struct device *dev,
2911                            struct device_attribute *attr,
2912                            char *buf)
2913 {
2914         int res;
2915         unsigned int speed;
2916
2917         res = fan_get_speed(&speed);
2918         if (res < 0)
2919                 return res;
2920
2921         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
2922 }
2923
2924 static struct device_attribute dev_attr_fan_fan1_input =
2925         __ATTR(fan1_input, S_IRUGO,
2926                 fan_fan1_input_show, NULL);
2927
2928 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
2929 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
2930                                      char *buf)
2931 {
2932         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
2933 }
2934
2935 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
2936                                       const char *buf, size_t count)
2937 {
2938         unsigned long t;
2939
2940         if (parse_strtoul(buf, 120, &t))
2941                 return -EINVAL;
2942
2943         if (!fan_control_allowed)
2944                 return -EPERM;
2945
2946         fan_watchdog_maxinterval = t;
2947         fan_watchdog_reset();
2948
2949         return count;
2950 }
2951
2952 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
2953                 fan_fan_watchdog_show, fan_fan_watchdog_store);
2954
2955 /* --------------------------------------------------------------------- */
2956 static struct attribute *fan_attributes[] = {
2957         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
2958         &dev_attr_fan_fan1_input.attr,
2959         NULL
2960 };
2961
2962 static const struct attribute_group fan_attr_group = {
2963         .attrs = fan_attributes,
2964 };
2965
2966 static int __init fan_init(struct ibm_init_struct *iibm)
2967 {
2968         int rc;
2969
2970         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
2971
2972         mutex_init(&fan_mutex);
2973         fan_status_access_mode = TPACPI_FAN_NONE;
2974         fan_control_access_mode = TPACPI_FAN_WR_NONE;
2975         fan_control_commands = 0;
2976         fan_watchdog_maxinterval = 0;
2977         tp_features.fan_ctrl_status_undef = 0;
2978         fan_control_desired_level = 7;
2979
2980         IBM_ACPIHANDLE_INIT(fans);
2981         IBM_ACPIHANDLE_INIT(gfan);
2982         IBM_ACPIHANDLE_INIT(sfan);
2983
2984         if (gfan_handle) {
2985                 /* 570, 600e/x, 770e, 770x */
2986                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
2987         } else {
2988                 /* all other ThinkPads: note that even old-style
2989                  * ThinkPad ECs supports the fan control register */
2990                 if (likely(acpi_ec_read(fan_status_offset,
2991                                         &fan_control_initial_status))) {
2992                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
2993
2994                         /* In some ThinkPads, neither the EC nor the ACPI
2995                          * DSDT initialize the fan status, and it ends up
2996                          * being set to 0x07 when it *could* be either
2997                          * 0x07 or 0x80.
2998                          *
2999                          * Enable for TP-1Y (T43), TP-78 (R51e),
3000                          * TP-76 (R52), TP-70 (T43, R52), which are known
3001                          * to be buggy. */
3002                         if (fan_control_initial_status == 0x07 &&
3003                             ibm_thinkpad_ec_found &&
3004                             ((ibm_thinkpad_ec_found[0] == '1' &&
3005                               ibm_thinkpad_ec_found[1] == 'Y') ||
3006                              (ibm_thinkpad_ec_found[0] == '7' &&
3007                               (ibm_thinkpad_ec_found[1] == '6' ||
3008                                ibm_thinkpad_ec_found[1] == '8' ||
3009                                ibm_thinkpad_ec_found[1] == '0'))
3010                             )) {
3011                                 printk(IBM_NOTICE
3012                                        "fan_init: initial fan status is "
3013                                        "unknown, assuming it is in auto "
3014                                        "mode\n");
3015                                 tp_features.fan_ctrl_status_undef = 1;
3016                         }
3017                 } else {
3018                         printk(IBM_ERR
3019                                "ThinkPad ACPI EC access misbehaving, "
3020                                "fan status and control unavailable\n");
3021                         return 1;
3022                 }
3023         }
3024
3025         if (sfan_handle) {
3026                 /* 570, 770x-JL */
3027                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3028                 fan_control_commands |=
3029                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3030         } else {
3031                 if (!gfan_handle) {
3032                         /* gfan without sfan means no fan control */
3033                         /* all other models implement TP EC 0x2f control */
3034
3035                         if (fans_handle) {
3036                                 /* X31, X40, X41 */
3037                                 fan_control_access_mode =
3038                                     TPACPI_FAN_WR_ACPI_FANS;
3039                                 fan_control_commands |=
3040                                     TPACPI_FAN_CMD_SPEED |
3041                                     TPACPI_FAN_CMD_LEVEL |
3042                                     TPACPI_FAN_CMD_ENABLE;
3043                         } else {
3044                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3045                                 fan_control_commands |=
3046                                     TPACPI_FAN_CMD_LEVEL |
3047                                     TPACPI_FAN_CMD_ENABLE;
3048                         }
3049                 }
3050         }
3051
3052         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3053                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3054                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3055                 fan_status_access_mode, fan_control_access_mode);
3056
3057         /* fan control master switch */
3058         if (!fan_control_allowed) {
3059                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3060                 fan_control_commands = 0;
3061                 dbg_printk(TPACPI_DBG_INIT,
3062                            "fan control features disabled by parameter\n");
3063         }
3064
3065         /* update fan_control_desired_level */
3066         if (fan_status_access_mode != TPACPI_FAN_NONE)
3067                 fan_get_status_safe(NULL);
3068
3069         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3070             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3071                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3072                                          &fan_attr_group);
3073                 if (!(rc < 0))
3074                         rc = driver_create_file(&tpacpi_pdriver.driver,
3075                                         &driver_attr_fan_watchdog);
3076                 if (rc < 0)
3077                         return rc;
3078                 return 0;
3079         } else
3080                 return 1;
3081 }
3082
3083 /*
3084  * Call with fan_mutex held
3085  */
3086 static void fan_update_desired_level(u8 status)
3087 {
3088         if ((status &
3089              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3090                 if (status > 7)
3091                         fan_control_desired_level = 7;
3092                 else
3093                         fan_control_desired_level = status;
3094         }
3095 }
3096
3097 static int fan_get_status(u8 *status)
3098 {
3099         u8 s;
3100
3101         /* TODO:
3102          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3103
3104         switch (fan_status_access_mode) {
3105         case TPACPI_FAN_RD_ACPI_GFAN:
3106                 /* 570, 600e/x, 770e, 770x */
3107
3108                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3109                         return -EIO;
3110
3111                 if (likely(status))
3112                         *status = s & 0x07;
3113
3114                 break;
3115
3116         case TPACPI_FAN_RD_TPEC:
3117                 /* all except 570, 600e/x, 770e, 770x */
3118                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3119                         return -EIO;
3120
3121                 if (likely(status))
3122                         *status = s;
3123
3124                 break;
3125
3126         default:
3127                 return -ENXIO;
3128         }
3129
3130         return 0;
3131 }
3132
3133 static int fan_get_status_safe(u8 *status)
3134 {
3135         int rc;
3136         u8 s;
3137
3138         rc = mutex_lock_interruptible(&fan_mutex);
3139         if (rc < 0)
3140                 return rc;
3141         rc = fan_get_status(&s);
3142         if (!rc)
3143                 fan_update_desired_level(s);
3144         mutex_unlock(&fan_mutex);
3145
3146         if (status)
3147                 *status = s;
3148
3149         return rc;
3150 }
3151
3152 static void fan_exit(void)
3153 {
3154         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3155
3156         /* FIXME: can we really do this unconditionally? */
3157         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3158         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3159
3160         cancel_delayed_work(&fan_watchdog_task);
3161         flush_scheduled_work();
3162 }
3163
3164 static int fan_get_speed(unsigned int *speed)
3165 {
3166         u8 hi, lo;
3167
3168         switch (fan_status_access_mode) {
3169         case TPACPI_FAN_RD_TPEC:
3170                 /* all except 570, 600e/x, 770e, 770x */
3171                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3172                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3173                         return -EIO;
3174
3175                 if (likely(speed))
3176                         *speed = (hi << 8) | lo;
3177
3178                 break;
3179
3180         default:
3181                 return -ENXIO;
3182         }
3183
3184         return 0;
3185 }
3186
3187 static void fan_watchdog_fire(struct work_struct *ignored)
3188 {
3189         int rc;
3190
3191         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3192         rc = fan_set_enable();
3193         if (rc < 0) {
3194                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3195                         "will try again later...\n", -rc);
3196                 /* reschedule for later */
3197                 fan_watchdog_reset();
3198         }
3199 }
3200
3201 static void fan_watchdog_reset(void)
3202 {
3203         static int fan_watchdog_active = 0;
3204
3205         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3206                 return;
3207
3208         if (fan_watchdog_active)
3209                 cancel_delayed_work(&fan_watchdog_task);
3210
3211         if (fan_watchdog_maxinterval > 0) {
3212                 fan_watchdog_active = 1;
3213                 if (!schedule_delayed_work(&fan_watchdog_task,
3214                                 msecs_to_jiffies(fan_watchdog_maxinterval
3215                                                  * 1000))) {
3216                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3217                                "watchdog will not trigger\n");
3218                 }
3219         } else
3220                 fan_watchdog_active = 0;
3221 }
3222
3223 static int fan_set_level(int level)
3224 {
3225         if (!fan_control_allowed)
3226                 return -EPERM;
3227
3228         switch (fan_control_access_mode) {
3229         case TPACPI_FAN_WR_ACPI_SFAN:
3230                 if (level >= 0 && level <= 7) {
3231                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3232                                 return -EIO;
3233                 } else
3234                         return -EINVAL;
3235                 break;
3236
3237         case TPACPI_FAN_WR_ACPI_FANS:
3238         case TPACPI_FAN_WR_TPEC:
3239                 if ((level != TP_EC_FAN_AUTO) &&
3240                     (level != TP_EC_FAN_FULLSPEED) &&
3241                     ((level < 0) || (level > 7)))
3242                         return -EINVAL;
3243
3244                 /* safety net should the EC not support AUTO
3245                  * or FULLSPEED mode bits and just ignore them */
3246                 if (level & TP_EC_FAN_FULLSPEED)
3247                         level |= 7;     /* safety min speed 7 */
3248                 else if (level & TP_EC_FAN_FULLSPEED)
3249                         level |= 4;     /* safety min speed 4 */
3250
3251                 if (!acpi_ec_write(fan_status_offset, level))
3252                         return -EIO;
3253                 else
3254                         tp_features.fan_ctrl_status_undef = 0;
3255                 break;
3256
3257         default:
3258                 return -ENXIO;
3259         }
3260         return 0;
3261 }
3262
3263 static int fan_set_level_safe(int level)
3264 {
3265         int rc;
3266
3267         if (!fan_control_allowed)
3268                 return -EPERM;
3269
3270         rc = mutex_lock_interruptible(&fan_mutex);
3271         if (rc < 0)
3272                 return rc;
3273
3274         if (level == TPACPI_FAN_LAST_LEVEL)
3275                 level = fan_control_desired_level;
3276
3277         rc = fan_set_level(level);
3278         if (!rc)
3279                 fan_update_desired_level(level);
3280
3281         mutex_unlock(&fan_mutex);
3282         return rc;
3283 }
3284
3285 static int fan_set_enable(void)
3286 {
3287         u8 s;
3288         int rc;
3289
3290         if (!fan_control_allowed)
3291                 return -EPERM;
3292
3293         rc = mutex_lock_interruptible(&fan_mutex);
3294         if (rc < 0)
3295                 return rc;
3296
3297         switch (fan_control_access_mode) {
3298         case TPACPI_FAN_WR_ACPI_FANS:
3299         case TPACPI_FAN_WR_TPEC:
3300                 rc = fan_get_status(&s);
3301                 if (rc < 0)
3302                         break;
3303
3304                 /* Don't go out of emergency fan mode */
3305                 if (s != 7) {
3306                         s &= 0x07;
3307                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3308                 }
3309
3310                 if (!acpi_ec_write(fan_status_offset, s))
3311                         rc = -EIO;
3312                 else {
3313                         tp_features.fan_ctrl_status_undef = 0;
3314                         rc = 0;
3315                 }
3316                 break;
3317
3318         case TPACPI_FAN_WR_ACPI_SFAN:
3319                 rc = fan_get_status(&s);
3320                 if (rc < 0)
3321                         break;
3322
3323                 s &= 0x07;
3324
3325                 /* Set fan to at least level 4 */
3326                 s |= 4;
3327
3328                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3329                         rc= -EIO;
3330                 else
3331                         rc = 0;
3332                 break;
3333
3334         default:
3335                 rc = -ENXIO;
3336         }
3337
3338         mutex_unlock(&fan_mutex);
3339         return rc;
3340 }
3341
3342 static int fan_set_disable(void)
3343 {
3344         int rc;
3345
3346         if (!fan_control_allowed)
3347                 return -EPERM;
3348
3349         rc = mutex_lock_interruptible(&fan_mutex);
3350         if (rc < 0)
3351                 return rc;
3352
3353         rc = 0;
3354         switch (fan_control_access_mode) {
3355         case TPACPI_FAN_WR_ACPI_FANS:
3356         case TPACPI_FAN_WR_TPEC:
3357                 if (!acpi_ec_write(fan_status_offset, 0x00))
3358                         rc = -EIO;
3359                 else {
3360                         fan_control_desired_level = 0;
3361                         tp_features.fan_ctrl_status_undef = 0;
3362                 }
3363                 break;
3364
3365         case TPACPI_FAN_WR_ACPI_SFAN:
3366                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3367                         rc = -EIO;
3368                 else
3369                         fan_control_desired_level = 0;
3370                 break;
3371
3372         default:
3373                 rc = -ENXIO;
3374         }
3375
3376
3377         mutex_unlock(&fan_mutex);
3378         return rc;
3379 }
3380
3381 static int fan_set_speed(int speed)
3382 {
3383         int rc;
3384
3385         if (!fan_control_allowed)
3386                 return -EPERM;
3387
3388         rc = mutex_lock_interruptible(&fan_mutex);
3389         if (rc < 0)
3390                 return rc;
3391
3392         rc = 0;
3393         switch (fan_control_access_mode) {
3394         case TPACPI_FAN_WR_ACPI_FANS:
3395                 if (speed >= 0 && speed <= 65535) {
3396                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3397                                         speed, speed, speed))
3398                                 rc = -EIO;
3399                 } else
3400                         rc = -EINVAL;
3401                 break;
3402
3403         default:
3404                 rc = -ENXIO;
3405         }
3406
3407         mutex_unlock(&fan_mutex);
3408         return rc;
3409 }
3410
3411 static int fan_read(char *p)
3412 {
3413         int len = 0;
3414         int rc;
3415         u8 status;
3416         unsigned int speed = 0;
3417
3418         switch (fan_status_access_mode) {
3419         case TPACPI_FAN_RD_ACPI_GFAN:
3420                 /* 570, 600e/x, 770e, 770x */
3421                 if ((rc = fan_get_status_safe(&status)) < 0)
3422                         return rc;
3423
3424                 len += sprintf(p + len, "status:\t\t%s\n"
3425                                "level:\t\t%d\n",
3426                                (status != 0) ? "enabled" : "disabled", status);
3427                 break;
3428
3429         case TPACPI_FAN_RD_TPEC:
3430                 /* all except 570, 600e/x, 770e, 770x */
3431                 if ((rc = fan_get_status_safe(&status)) < 0)
3432                         return rc;
3433
3434                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3435                         if (status != fan_control_initial_status)
3436                                 tp_features.fan_ctrl_status_undef = 0;
3437                         else
3438                                 /* Return most likely status. In fact, it
3439                                  * might be the only possible status */
3440                                 status = TP_EC_FAN_AUTO;
3441                 }
3442
3443                 len += sprintf(p + len, "status:\t\t%s\n",
3444                                (status != 0) ? "enabled" : "disabled");
3445
3446                 if ((rc = fan_get_speed(&speed)) < 0)
3447                         return rc;
3448
3449                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3450
3451                 if (status & TP_EC_FAN_FULLSPEED)
3452                         /* Disengaged mode takes precedence */
3453                         len += sprintf(p + len, "level:\t\tdisengaged\n");
3454                 else if (status & TP_EC_FAN_AUTO)
3455                         len += sprintf(p + len, "level:\t\tauto\n");
3456                 else
3457                         len += sprintf(p + len, "level:\t\t%d\n", status);
3458                 break;
3459
3460         case TPACPI_FAN_NONE:
3461         default:
3462                 len += sprintf(p + len, "status:\t\tnot supported\n");
3463         }
3464
3465         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3466                 len += sprintf(p + len, "commands:\tlevel <level>");
3467
3468                 switch (fan_control_access_mode) {
3469                 case TPACPI_FAN_WR_ACPI_SFAN:
3470                         len += sprintf(p + len, " (<level> is 0-7)\n");
3471                         break;
3472
3473                 default:
3474                         len += sprintf(p + len, " (<level> is 0-7, "
3475                                        "auto, disengaged, full-speed)\n");
3476                         break;
3477                 }
3478         }
3479
3480         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3481                 len += sprintf(p + len, "commands:\tenable, disable\n"
3482                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3483                                "1-120 (seconds))\n");
3484
3485         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3486                 len += sprintf(p + len, "commands:\tspeed <speed>"
3487                                " (<speed> is 0-65535)\n");
3488
3489         return len;
3490 }
3491
3492 static int fan_write_cmd_level(const char *cmd, int *rc)
3493 {
3494         int level;
3495
3496         if (strlencmp(cmd, "level auto") == 0)
3497                 level = TP_EC_FAN_AUTO;
3498         else if ((strlencmp(cmd, "level disengaged") == 0) |
3499                  (strlencmp(cmd, "level full-speed") == 0))
3500                 level = TP_EC_FAN_FULLSPEED;
3501         else if (sscanf(cmd, "level %d", &level) != 1)
3502                 return 0;
3503
3504         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3505                 printk(IBM_ERR "level command accepted for unsupported "
3506                        "access mode %d", fan_control_access_mode);
3507
3508         return 1;
3509 }
3510
3511 static int fan_write_cmd_enable(const char *cmd, int *rc)
3512 {
3513         if (strlencmp(cmd, "enable") != 0)
3514                 return 0;
3515
3516         if ((*rc = fan_set_enable()) == -ENXIO)
3517                 printk(IBM_ERR "enable command accepted for unsupported "
3518                        "access mode %d", fan_control_access_mode);
3519
3520         return 1;
3521 }
3522
3523 static int fan_write_cmd_disable(const char *cmd, int *rc)
3524 {
3525         if (strlencmp(cmd, "disable") != 0)
3526                 return 0;
3527
3528         if ((*rc = fan_set_disable()) == -ENXIO)
3529                 printk(IBM_ERR "disable command accepted for unsupported "
3530                        "access mode %d", fan_control_access_mode);
3531
3532         return 1;
3533 }
3534
3535 static int fan_write_cmd_speed(const char *cmd, int *rc)
3536 {
3537         int speed;
3538
3539         /* TODO:
3540          * Support speed <low> <medium> <high> ? */
3541
3542         if (sscanf(cmd, "speed %d", &speed) != 1)
3543                 return 0;
3544
3545         if ((*rc = fan_set_speed(speed)) == -ENXIO)
3546                 printk(IBM_ERR "speed command accepted for unsupported "
3547                        "access mode %d", fan_control_access_mode);
3548
3549         return 1;
3550 }
3551
3552 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3553 {
3554         int interval;
3555
3556         if (sscanf(cmd, "watchdog %d", &interval) != 1)
3557                 return 0;
3558
3559         if (interval < 0 || interval > 120)
3560                 *rc = -EINVAL;
3561         else
3562                 fan_watchdog_maxinterval = interval;
3563
3564         return 1;
3565 }
3566
3567 static int fan_write(char *buf)
3568 {
3569         char *cmd;
3570         int rc = 0;
3571
3572         while (!rc && (cmd = next_cmd(&buf))) {
3573                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3574                       fan_write_cmd_level(cmd, &rc)) &&
3575                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3576                       (fan_write_cmd_enable(cmd, &rc) ||
3577                        fan_write_cmd_disable(cmd, &rc) ||
3578                        fan_write_cmd_watchdog(cmd, &rc))) &&
3579                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3580                       fan_write_cmd_speed(cmd, &rc))
3581                     )
3582                         rc = -EINVAL;
3583                 else if (!rc)
3584                         fan_watchdog_reset();
3585         }
3586
3587         return rc;
3588 }
3589
3590 static struct ibm_struct fan_driver_data = {
3591         .name = "fan",
3592         .read = fan_read,
3593         .write = fan_write,
3594         .exit = fan_exit,
3595 };
3596
3597 /****************************************************************************
3598  ****************************************************************************
3599  *
3600  * Infrastructure
3601  *
3602  ****************************************************************************
3603  ****************************************************************************/
3604
3605 /* /proc support */
3606 static struct proc_dir_entry *proc_dir = NULL;
3607
3608 /* Subdriver registry */
3609 static LIST_HEAD(tpacpi_all_drivers);
3610
3611
3612 /*
3613  * Module and infrastructure proble, init and exit handling
3614  */
3615
3616 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3617 static const char * __init str_supported(int is_supported)
3618 {
3619         static char text_unsupported[] __initdata = "not supported";
3620
3621         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3622 }
3623 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3624
3625 static int __init ibm_init(struct ibm_init_struct *iibm)
3626 {
3627         int ret;
3628         struct ibm_struct *ibm = iibm->data;
3629         struct proc_dir_entry *entry;
3630
3631         BUG_ON(ibm == NULL);
3632
3633         INIT_LIST_HEAD(&ibm->all_drivers);
3634
3635         if (ibm->flags.experimental && !experimental)
3636                 return 0;
3637
3638         dbg_printk(TPACPI_DBG_INIT,
3639                 "probing for %s\n", ibm->name);
3640
3641         if (iibm->init) {
3642                 ret = iibm->init(iibm);
3643                 if (ret > 0)
3644                         return 0;       /* probe failed */
3645                 if (ret)
3646                         return ret;
3647
3648                 ibm->flags.init_called = 1;
3649         }
3650
3651         if (ibm->acpi) {
3652                 if (ibm->acpi->hid) {
3653                         ret = register_tpacpi_subdriver(ibm);
3654                         if (ret)
3655                                 goto err_out;
3656                 }
3657
3658                 if (ibm->acpi->notify) {
3659                         ret = setup_acpi_notify(ibm);
3660                         if (ret == -ENODEV) {
3661                                 printk(IBM_NOTICE "disabling subdriver %s\n",
3662                                         ibm->name);
3663                                 ret = 0;
3664                                 goto err_out;
3665                         }
3666                         if (ret < 0)
3667                                 goto err_out;
3668                 }
3669         }
3670
3671         dbg_printk(TPACPI_DBG_INIT,
3672                 "%s installed\n", ibm->name);
3673
3674         if (ibm->read) {
3675                 entry = create_proc_entry(ibm->name,
3676                                           S_IFREG | S_IRUGO | S_IWUSR,
3677                                           proc_dir);
3678                 if (!entry) {
3679                         printk(IBM_ERR "unable to create proc entry %s\n",
3680                                ibm->name);
3681                         ret = -ENODEV;
3682                         goto err_out;
3683                 }
3684                 entry->owner = THIS_MODULE;
3685                 entry->data = ibm;
3686                 entry->read_proc = &dispatch_procfs_read;
3687                 if (ibm->write)
3688                         entry->write_proc = &dispatch_procfs_write;
3689                 ibm->flags.proc_created = 1;
3690         }
3691
3692         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3693
3694         return 0;
3695
3696 err_out:
3697         dbg_printk(TPACPI_DBG_INIT,
3698                 "%s: at error exit path with result %d\n",
3699                 ibm->name, ret);
3700
3701         ibm_exit(ibm);
3702         return (ret < 0)? ret : 0;
3703 }
3704
3705 static void ibm_exit(struct ibm_struct *ibm)
3706 {
3707         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3708
3709         list_del_init(&ibm->all_drivers);
3710
3711         if (ibm->flags.acpi_notify_installed) {
3712                 dbg_printk(TPACPI_DBG_EXIT,
3713                         "%s: acpi_remove_notify_handler\n", ibm->name);
3714                 BUG_ON(!ibm->acpi);
3715                 acpi_remove_notify_handler(*ibm->acpi->handle,
3716                                            ibm->acpi->type,
3717                                            dispatch_acpi_notify);
3718                 ibm->flags.acpi_notify_installed = 0;
3719                 ibm->flags.acpi_notify_installed = 0;
3720         }
3721
3722         if (ibm->flags.proc_created) {
3723                 dbg_printk(TPACPI_DBG_EXIT,
3724                         "%s: remove_proc_entry\n", ibm->name);
3725                 remove_proc_entry(ibm->name, proc_dir);
3726                 ibm->flags.proc_created = 0;
3727         }
3728
3729         if (ibm->flags.acpi_driver_registered) {
3730                 dbg_printk(TPACPI_DBG_EXIT,
3731                         "%s: acpi_bus_unregister_driver\n", ibm->name);
3732                 BUG_ON(!ibm->acpi);
3733                 acpi_bus_unregister_driver(ibm->acpi->driver);
3734                 kfree(ibm->acpi->driver);
3735                 ibm->acpi->driver = NULL;
3736                 ibm->flags.acpi_driver_registered = 0;
3737         }
3738
3739         if (ibm->flags.init_called && ibm->exit) {
3740                 ibm->exit();
3741                 ibm->flags.init_called = 0;
3742         }
3743
3744         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
3745 }
3746
3747 /* Probing */
3748
3749 static char *ibm_thinkpad_ec_found = NULL;
3750
3751 static char* __init check_dmi_for_ec(void)
3752 {
3753         struct dmi_device *dev = NULL;
3754         char ec_fw_string[18];
3755
3756         /*
3757          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
3758          * X32 or newer, all Z series;  Some models must have an
3759          * up-to-date BIOS or they will not be detected.
3760          *
3761          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
3762          */
3763         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
3764                 if (sscanf(dev->name,
3765                            "IBM ThinkPad Embedded Controller -[%17c",
3766                            ec_fw_string) == 1) {
3767                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
3768                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
3769                         return kstrdup(ec_fw_string, GFP_KERNEL);
3770                 }
3771         }
3772         return NULL;
3773 }
3774
3775 static int __init probe_for_thinkpad(void)
3776 {
3777         int is_thinkpad;
3778
3779         if (acpi_disabled)
3780                 return -ENODEV;
3781
3782         /*
3783          * Non-ancient models have better DMI tagging, but very old models
3784          * don't.
3785          */
3786         is_thinkpad = dmi_name_in_vendors("ThinkPad");
3787
3788         /* ec is required because many other handles are relative to it */
3789         IBM_ACPIHANDLE_INIT(ec);
3790         if (!ec_handle) {
3791                 if (is_thinkpad)
3792                         printk(IBM_ERR
3793                                 "Not yet supported ThinkPad detected!\n");
3794                 return -ENODEV;
3795         }
3796
3797         /*
3798          * Risks a regression on very old machines, but reduces potential
3799          * false positives a damn great deal
3800          */
3801         if (!is_thinkpad)
3802                 is_thinkpad = dmi_name_in_vendors("IBM");
3803
3804         if (!is_thinkpad && !force_load)
3805                 return -ENODEV;
3806
3807         return 0;
3808 }
3809
3810
3811 /* Module init, exit, parameters */
3812
3813 static struct ibm_init_struct ibms_init[] __initdata = {
3814         {
3815                 .init = thinkpad_acpi_driver_init,
3816                 .data = &thinkpad_acpi_driver_data,
3817         },
3818         {
3819                 .init = hotkey_init,
3820                 .data = &hotkey_driver_data,
3821         },
3822         {
3823                 .init = bluetooth_init,
3824                 .data = &bluetooth_driver_data,
3825         },
3826         {
3827                 .init = wan_init,
3828                 .data = &wan_driver_data,
3829         },
3830         {
3831                 .init = video_init,
3832                 .data = &video_driver_data,
3833         },
3834         {
3835                 .init = light_init,
3836                 .data = &light_driver_data,
3837         },
3838 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3839         {
3840                 .init = dock_init,
3841                 .data = &dock_driver_data[0],
3842         },
3843         {
3844                 .data = &dock_driver_data[1],
3845         },
3846 #endif
3847 #ifdef CONFIG_THINKPAD_ACPI_BAY
3848         {
3849                 .init = bay_init,
3850                 .data = &bay_driver_data,
3851         },
3852 #endif
3853         {
3854                 .init = cmos_init,
3855                 .data = &cmos_driver_data,
3856         },
3857         {
3858                 .init = led_init,
3859                 .data = &led_driver_data,
3860         },
3861         {
3862                 .init = beep_init,
3863                 .data = &beep_driver_data,
3864         },
3865         {
3866                 .init = thermal_init,
3867                 .data = &thermal_driver_data,
3868         },
3869         {
3870                 .data = &ecdump_driver_data,
3871         },
3872         {
3873                 .init = brightness_init,
3874                 .data = &brightness_driver_data,
3875         },
3876         {
3877                 .data = &volume_driver_data,
3878         },
3879         {
3880                 .init = fan_init,
3881                 .data = &fan_driver_data,
3882         },
3883 };
3884
3885 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
3886 {
3887         unsigned int i;
3888         struct ibm_struct *ibm;
3889
3890         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3891                 ibm = ibms_init[i].data;
3892                 BUG_ON(ibm == NULL);
3893
3894                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
3895                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
3896                                 return -ENOSPC;
3897                         strcpy(ibms_init[i].param, val);
3898                         strcat(ibms_init[i].param, ",");
3899                         return 0;
3900                 }
3901         }
3902
3903         return -EINVAL;
3904 }
3905
3906 static int experimental;
3907 module_param(experimental, int, 0);
3908
3909 static u32 dbg_level;
3910 module_param_named(debug, dbg_level, uint, 0);
3911
3912 static int force_load;
3913 module_param(force_load, int, 0);
3914
3915 static int fan_control_allowed;
3916 module_param_named(fan_control, fan_control_allowed, int, 0);
3917
3918 #define IBM_PARAM(feature) \
3919         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
3920
3921 IBM_PARAM(hotkey);
3922 IBM_PARAM(bluetooth);
3923 IBM_PARAM(video);
3924 IBM_PARAM(light);
3925 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3926 IBM_PARAM(dock);
3927 #endif
3928 #ifdef CONFIG_THINKPAD_ACPI_BAY
3929 IBM_PARAM(bay);
3930 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3931 IBM_PARAM(cmos);
3932 IBM_PARAM(led);
3933 IBM_PARAM(beep);
3934 IBM_PARAM(ecdump);
3935 IBM_PARAM(brightness);
3936 IBM_PARAM(volume);
3937 IBM_PARAM(fan);
3938
3939 static int __init thinkpad_acpi_module_init(void)
3940 {
3941         int ret, i;
3942
3943         /* Driver-level probe */
3944         ret = probe_for_thinkpad();
3945         if (ret)
3946                 return ret;
3947
3948         /* Driver initialization */
3949         ibm_thinkpad_ec_found = check_dmi_for_ec();
3950         IBM_ACPIHANDLE_INIT(ecrd);
3951         IBM_ACPIHANDLE_INIT(ecwr);
3952
3953         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
3954         if (!proc_dir) {
3955                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
3956                 thinkpad_acpi_module_exit();
3957                 return -ENODEV;
3958         }
3959         proc_dir->owner = THIS_MODULE;
3960
3961         ret = platform_driver_register(&tpacpi_pdriver);
3962         if (ret) {
3963                 printk(IBM_ERR "unable to register platform driver\n");
3964                 thinkpad_acpi_module_exit();
3965                 return ret;
3966         }
3967         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
3968         if (ret) {
3969                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
3970                 thinkpad_acpi_module_exit();
3971                 return ret;
3972         }
3973
3974
3975         /* Device initialization */
3976         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
3977                                                         NULL, 0);
3978         if (IS_ERR(tpacpi_pdev)) {
3979                 ret = PTR_ERR(tpacpi_pdev);
3980                 tpacpi_pdev = NULL;
3981                 printk(IBM_ERR "unable to register platform device\n");
3982                 thinkpad_acpi_module_exit();
3983                 return ret;
3984         }
3985         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
3986         if (IS_ERR(tpacpi_hwmon)) {
3987                 ret = PTR_ERR(tpacpi_hwmon);
3988                 tpacpi_hwmon = NULL;
3989                 printk(IBM_ERR "unable to register hwmon device\n");
3990                 thinkpad_acpi_module_exit();
3991                 return ret;
3992         }
3993         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
3994                 ret = ibm_init(&ibms_init[i]);
3995                 if (ret >= 0 && *ibms_init[i].param)
3996                         ret = ibms_init[i].data->write(ibms_init[i].param);
3997                 if (ret < 0) {
3998                         thinkpad_acpi_module_exit();
3999                         return ret;
4000                 }
4001         }
4002
4003         return 0;
4004 }
4005
4006 static void thinkpad_acpi_module_exit(void)
4007 {
4008         struct ibm_struct *ibm, *itmp;
4009
4010         list_for_each_entry_safe_reverse(ibm, itmp,
4011                                          &tpacpi_all_drivers,
4012                                          all_drivers) {
4013                 ibm_exit(ibm);
4014         }
4015
4016         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4017
4018         if (tpacpi_hwmon)
4019                 hwmon_device_unregister(tpacpi_hwmon);
4020
4021         if (tpacpi_pdev)
4022                 platform_device_unregister(tpacpi_pdev);
4023
4024         tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4025         platform_driver_unregister(&tpacpi_pdriver);
4026
4027         if (proc_dir)
4028                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4029
4030         kfree(ibm_thinkpad_ec_found);
4031 }
4032
4033 module_init(thinkpad_acpi_module_init);
4034 module_exit(thinkpad_acpi_module_exit);