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   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         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 300                 name);
 301
 302         for (i = 0; i < num_paths; i++) {
 303                 status = acpi_get_handle(parent, paths[i], handle);
 304                 if (ACPI_SUCCESS(status)) {
 305                         *path = paths[i];
 306                         dbg_printk(TPACPI_DBG_INIT,
 307                                    "Found ACPI handle %s for %s\n",
 308                                    *path, name);
 309                         return;
 310                 }
 311         }
 312
 313         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 314                     name);
 315         *handle = NULL;
 316 }
 317
 318 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 319 {
 320         struct ibm_struct *ibm = data;
 321
 322         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 323                 return;
 324
 325         ibm->acpi->notify(ibm, event);
 326 }
 327
 328 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 329 {
 330         acpi_status status;
 331         int rc;
 332
 333         BUG_ON(!ibm->acpi);
 334
 335         if (!*ibm->acpi->handle)
 336                 return 0;
 337
 338         vdbg_printk(TPACPI_DBG_INIT,
 339                 "setting up ACPI notify for %s\n", ibm->name);
 340
 341         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 342         if (rc < 0) {
 343                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 344                         ibm->name, rc);
 345                 return -ENODEV;
 346         }
 347
 348         acpi_driver_data(ibm->acpi->device) = ibm;
 349         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 350                 IBM_ACPI_EVENT_PREFIX,
 351                 ibm->name);
 352
 353         status = acpi_install_notify_handler(*ibm->acpi->handle,
 354                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 355         if (ACPI_FAILURE(status)) {
 356                 if (status == AE_ALREADY_EXISTS) {
 357                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 358                                 ibm->name);
 359                 } else {
 360                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 361                                 ibm->name, status);
 362                 }
 363                 return -ENODEV;
 364         }
 365         ibm->flags.acpi_notify_installed = 1;
 366         return 0;
 367 }
 368
 369 static int __init tpacpi_device_add(struct acpi_device *device)
 370 {
 371         return 0;
 372 }
 373
 374 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 375 {
 376         int rc;
 377
 378         dbg_printk(TPACPI_DBG_INIT,
 379                 "registering %s as an ACPI driver\n", ibm->name);
 380
 381         BUG_ON(!ibm->acpi);
 382
 383         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 384         if (!ibm->acpi->driver) {
 385                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 386                 return -ENOMEM;
 387         }
 388
 389         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 390         ibm->acpi->driver->ids = ibm->acpi->hid;
 391         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 392
 393         rc = acpi_bus_register_driver(ibm->acpi->driver);
 394         if (rc < 0) {
 395                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 396                        ibm->acpi->hid, rc);
 397                 kfree(ibm->acpi->driver);
 398                 ibm->acpi->driver = NULL;
 399         } else if (!rc)
 400                 ibm->flags.acpi_driver_registered = 1;
 401
 402         return rc;
 403 }
 404
 405
 406 /****************************************************************************
 407  ****************************************************************************
 408  *
 409  * Procfs Helpers
 410  *
 411  ****************************************************************************
 412  ****************************************************************************/
 413
 414 static int dispatch_procfs_read(char *page, char **start, off_t off,
 415                         int count, int *eof, void *data)
 416 {
 417         struct ibm_struct *ibm = data;
 418         int len;
 419
 420         if (!ibm || !ibm->read)
 421                 return -EINVAL;
 422
 423         len = ibm->read(page);
 424         if (len < 0)
 425                 return len;
 426
 427         if (len <= off + count)
 428                 *eof = 1;
 429         *start = page + off;
 430         len -= off;
 431         if (len > count)
 432                 len = count;
 433         if (len < 0)
 434                 len = 0;
 435
 436         return len;
 437 }
 438
 439 static int dispatch_procfs_write(struct file *file,
 440                         const char __user * userbuf,
 441                         unsigned long count, void *data)
 442 {
 443         struct ibm_struct *ibm = data;
 444         char *kernbuf;
 445         int ret;
 446
 447         if (!ibm || !ibm->write)
 448                 return -EINVAL;
 449
 450         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 451         if (!kernbuf)
 452                 return -ENOMEM;
 453
 454         if (copy_from_user(kernbuf, userbuf, count)) {
 455                 kfree(kernbuf);
 456                 return -EFAULT;
 457         }
 458
 459         kernbuf[count] = 0;
 460         strcat(kernbuf, ",");
 461         ret = ibm->write(kernbuf);
 462         if (ret == 0)
 463                 ret = count;
 464
 465         kfree(kernbuf);
 466
 467         return ret;
 468 }
 469
 470 static char *next_cmd(char **cmds)
 471 {
 472         char *start = *cmds;
 473         char *end;
 474
 475         while ((end = strchr(start, ',')) && end == start)
 476                 start = end + 1;
 477
 478         if (!end)
 479                 return NULL;
 480
 481         *end = 0;
 482         *cmds = end + 1;
 483         return start;
 484 }
 485
 486
 487 /****************************************************************************
 488  ****************************************************************************
 489  *
 490  * Device model: hwmon and platform
 491  *
 492  ****************************************************************************
 493  ****************************************************************************/
 494
 495 static struct platform_device *tpacpi_pdev = NULL;
 496 static struct class_device *tpacpi_hwmon = NULL;
 497
 498 static struct platform_driver tpacpi_pdriver = {
 499         .driver = {
 500                 .name = IBM_DRVR_NAME,
 501                 .owner = THIS_MODULE,
 502         },
 503 };
 504
 505
 506 /*************************************************************************
 507  * thinkpad-acpi driver attributes
 508  */
 509
 510 /* interface_version --------------------------------------------------- */
 511 static ssize_t tpacpi_driver_interface_version_show(
 512                                 struct device_driver *drv,
 513                                 char *buf)
 514 {
 515         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 516 }
 517
 518 static DRIVER_ATTR(interface_version, S_IRUGO,
 519                 tpacpi_driver_interface_version_show, NULL);
 520
 521 /* debug_level --------------------------------------------------------- */
 522 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 523                                                 char *buf)
 524 {
 525         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 526 }
 527
 528 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 529                                                 const char *buf, size_t count)
 530 {
 531         unsigned long t;
 532
 533         if (parse_strtoul(buf, 0xffff, &t))
 534                 return -EINVAL;
 535
 536         dbg_level = t;
 537
 538         return count;
 539 }
 540
 541 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 542                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 543
 544 /* version ------------------------------------------------------------- */
 545 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 546                                                 char *buf)
 547 {
 548         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 549 }
 550
 551 static DRIVER_ATTR(version, S_IRUGO,
 552                 tpacpi_driver_version_show, NULL);
 553
 554 /* --------------------------------------------------------------------- */
 555
 556 static struct driver_attribute* tpacpi_driver_attributes[] = {
 557         &driver_attr_debug_level, &driver_attr_version,
 558         &driver_attr_interface_version,
 559 };
 560
 561 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 562 {
 563         int i, res;
 564
 565         i = 0;
 566         res = 0;
 567         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 568                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 569                 i++;
 570         }
 571
 572         return res;
 573 }
 574
 575 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 576 {
 577         int i;
 578
 579         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 580                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 581 }
 582
 583 /*************************************************************************
 584  * sysfs support helpers
 585  */
 586
 587 struct attribute_set_obj {
 588         struct attribute_set s;
 589         struct attribute *a;
 590 } __attribute__((packed));
 591
 592 static struct attribute_set *create_attr_set(unsigned int max_members,
 593                                                 const char* name)
 594 {
 595         struct attribute_set_obj *sobj;
 596
 597         if (max_members == 0)
 598                 return NULL;
 599
 600         /* Allocates space for implicit NULL at the end too */
 601         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 602                     max_members * sizeof(struct attribute *),
 603                     GFP_KERNEL);
 604         if (!sobj)
 605                 return NULL;
 606         sobj->s.max_members = max_members;
 607         sobj->s.group.attrs = &sobj->a;
 608         sobj->s.group.name = name;
 609
 610         return &sobj->s;
 611 }
 612
 613 /* not multi-threaded safe, use it in a single thread per set */
 614 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 615 {
 616         if (!s || !attr)
 617                 return -EINVAL;
 618
 619         if (s->members >= s->max_members)
 620                 return -ENOMEM;
 621
 622         s->group.attrs[s->members] = attr;
 623         s->members++;
 624
 625         return 0;
 626 }
 627
 628 static int add_many_to_attr_set(struct attribute_set* s,
 629                         struct attribute **attr,
 630                         unsigned int count)
 631 {
 632         int i, res;
 633
 634         for (i = 0; i < count; i++) {
 635                 res = add_to_attr_set(s, attr[i]);
 636                 if (res)
 637                         return res;
 638         }
 639
 640         return 0;
 641 }
 642
 643 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 644 {
 645         sysfs_remove_group(kobj, &s->group);
 646         destroy_attr_set(s);
 647 }
 648
 649 static int parse_strtoul(const char *buf,
 650                 unsigned long max, unsigned long *value)
 651 {
 652         char *endp;
 653
 654         *value = simple_strtoul(buf, &endp, 0);
 655         while (*endp && isspace(*endp))
 656                 endp++;
 657         if (*endp || *value > max)
 658                 return -EINVAL;
 659
 660         return 0;
 661 }
 662
 663 /****************************************************************************
 664  ****************************************************************************
 665  *
 666  * Subdrivers
 667  *
 668  ****************************************************************************
 669  ****************************************************************************/
 670
 671 /*************************************************************************
 672  * thinkpad-acpi init subdriver
 673  */
 674
 675 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 676 {
 677         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 678         printk(IBM_INFO "%s\n", IBM_URL);
 679
 680         if (ibm_thinkpad_ec_found)
 681                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 682                        ibm_thinkpad_ec_found);
 683
 684         return 0;
 685 }
 686
 687 static int thinkpad_acpi_driver_read(char *p)
 688 {
 689         int len = 0;
 690
 691         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 692         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 693
 694         return len;
 695 }
 696
 697 static struct ibm_struct thinkpad_acpi_driver_data = {
 698         .name = "driver",
 699         .read = thinkpad_acpi_driver_read,
 700 };
 701
 702 /*************************************************************************
 703  * Hotkey subdriver
 704  */
 705
 706 static int hotkey_orig_status;
 707 static int hotkey_orig_mask;
 708
 709 static struct attribute_set *hotkey_dev_attributes = NULL;
 710
 711 /* sysfs hotkey enable ------------------------------------------------- */
 712 static ssize_t hotkey_enable_show(struct device *dev,
 713                            struct device_attribute *attr,
 714                            char *buf)
 715 {
 716         int res, status, mask;
 717
 718         res = hotkey_get(&status, &mask);
 719         if (res)
 720                 return res;
 721
 722         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 723 }
 724
 725 static ssize_t hotkey_enable_store(struct device *dev,
 726                             struct device_attribute *attr,
 727                             const char *buf, size_t count)
 728 {
 729         unsigned long t;
 730         int res, status, mask;
 731
 732         if (parse_strtoul(buf, 1, &t))
 733                 return -EINVAL;
 734
 735         res = hotkey_get(&status, &mask);
 736         if (!res)
 737                 res = hotkey_set(t, mask);
 738
 739         return (res) ? res : count;
 740 }
 741
 742 static struct device_attribute dev_attr_hotkey_enable =
 743         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 744                 hotkey_enable_show, hotkey_enable_store);
 745
 746 /* sysfs hotkey mask --------------------------------------------------- */
 747 static ssize_t hotkey_mask_show(struct device *dev,
 748                            struct device_attribute *attr,
 749                            char *buf)
 750 {
 751         int res, status, mask;
 752
 753         res = hotkey_get(&status, &mask);
 754         if (res)
 755                 return res;
 756
 757         return snprintf(buf, PAGE_SIZE, "0x%04x\n", mask);
 758 }
 759
 760 static ssize_t hotkey_mask_store(struct device *dev,
 761                             struct device_attribute *attr,
 762                             const char *buf, size_t count)
 763 {
 764         unsigned long t;
 765         int res, status, mask;
 766
 767         if (parse_strtoul(buf, 0xffff, &t))
 768                 return -EINVAL;
 769
 770         res = hotkey_get(&status, &mask);
 771         if (!res)
 772                 hotkey_set(status, t);
 773
 774         return (res) ? res : count;
 775 }
 776
 777 static struct device_attribute dev_attr_hotkey_mask =
 778         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 779                 hotkey_mask_show, hotkey_mask_store);
 780
 781 /* sysfs hotkey bios_enabled ------------------------------------------- */
 782 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 783                            struct device_attribute *attr,
 784                            char *buf)
 785 {
 786         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 787 }
 788
 789 static struct device_attribute dev_attr_hotkey_bios_enabled =
 790         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 791
 792 /* sysfs hotkey bios_mask ---------------------------------------------- */
 793 static ssize_t hotkey_bios_mask_show(struct device *dev,
 794                            struct device_attribute *attr,
 795                            char *buf)
 796 {
 797         return snprintf(buf, PAGE_SIZE, "0x%04x\n", hotkey_orig_mask);
 798 }
 799
 800 static struct device_attribute dev_attr_hotkey_bios_mask =
 801         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 802
 803 /* --------------------------------------------------------------------- */
 804
 805 static struct attribute *hotkey_mask_attributes[] = {
 806         &dev_attr_hotkey_mask.attr,
 807         &dev_attr_hotkey_bios_enabled.attr,
 808         &dev_attr_hotkey_bios_mask.attr,
 809 };
 810
 811 static int __init hotkey_init(struct ibm_init_struct *iibm)
 812 {
 813         int res;
 814
 815         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 816
 817         IBM_ACPIHANDLE_INIT(hkey);
 818         mutex_init(&hotkey_mutex);
 819
 820         /* hotkey not supported on 570 */
 821         tp_features.hotkey = hkey_handle != NULL;
 822
 823         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 824                 str_supported(tp_features.hotkey));
 825
 826         if (tp_features.hotkey) {
 827                 hotkey_dev_attributes = create_attr_set(4, NULL);
 828                 if (!hotkey_dev_attributes)
 829                         return -ENOMEM;
 830                 res = add_to_attr_set(hotkey_dev_attributes,
 831                                 &dev_attr_hotkey_enable.attr);
 832                 if (res)
 833                         return res;
 834
 835                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 836                    A30, R30, R31, T20-22, X20-21, X22-24 */
 837                 tp_features.hotkey_mask =
 838                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 839
 840                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 841                         str_supported(tp_features.hotkey_mask));
 842
 843                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 844                 if (!res && tp_features.hotkey_mask) {
 845                         res = add_many_to_attr_set(hotkey_dev_attributes,
 846                                 hotkey_mask_attributes,
 847                                 ARRAY_SIZE(hotkey_mask_attributes));
 848                 }
 849                 if (!res)
 850                         res = register_attr_set_with_sysfs(
 851                                         hotkey_dev_attributes,
 852                                         &tpacpi_pdev->dev.kobj);
 853
 854                 if (res)
 855                         return res;
 856         }
 857
 858         return (tp_features.hotkey)? 0 : 1;
 859 }
 860
 861 static void hotkey_exit(void)
 862 {
 863         int res;
 864
 865         if (tp_features.hotkey) {
 866                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 867                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 868                 if (res)
 869                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 870         }
 871
 872         if (hotkey_dev_attributes) {
 873                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
 874                 hotkey_dev_attributes = NULL;
 875         }
 876 }
 877
 878 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 879 {
 880         int hkey;
 881
 882         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 883                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 884         else {
 885                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 886                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 887         }
 888 }
 889
 890 /*
 891  * Call with hotkey_mutex held
 892  */
 893 static int hotkey_get(int *status, int *mask)
 894 {
 895         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 896                 return -EIO;
 897
 898         if (tp_features.hotkey_mask)
 899                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 900                         return -EIO;
 901
 902         return 0;
 903 }
 904
 905 /*
 906  * Call with hotkey_mutex held
 907  */
 908 static int hotkey_set(int status, int mask)
 909 {
 910         int i;
 911
 912         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 913                 return -EIO;
 914
 915         if (tp_features.hotkey_mask)
 916                 for (i = 0; i < 32; i++) {
 917                         int bit = ((1 << i) & mask) != 0;
 918                         if (!acpi_evalf(hkey_handle,
 919                                         NULL, "MHKM", "vdd", i + 1, bit))
 920                                 return -EIO;
 921                 }
 922
 923         return 0;
 924 }
 925
 926 /* procfs -------------------------------------------------------------- */
 927 static int hotkey_read(char *p)
 928 {
 929         int res, status, mask;
 930         int len = 0;
 931
 932         if (!tp_features.hotkey) {
 933                 len += sprintf(p + len, "status:\t\tnot supported\n");
 934                 return len;
 935         }
 936
 937         res = mutex_lock_interruptible(&hotkey_mutex);
 938         if (res < 0)
 939                 return res;
 940         res = hotkey_get(&status, &mask);
 941         mutex_unlock(&hotkey_mutex);
 942         if (res)
 943                 return res;
 944
 945         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 946         if (tp_features.hotkey_mask) {
 947                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 948                 len += sprintf(p + len,
 949                                "commands:\tenable, disable, reset, <mask>\n");
 950         } else {
 951                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 952                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 953         }
 954
 955         return len;
 956 }
 957
 958 static int hotkey_write(char *buf)
 959 {
 960         int res, status, mask;
 961         char *cmd;
 962         int do_cmd = 0;
 963
 964         if (!tp_features.hotkey)
 965                 return -ENODEV;
 966
 967         res = mutex_lock_interruptible(&hotkey_mutex);
 968         if (res < 0)
 969                 return res;
 970
 971         res = hotkey_get(&status, &mask);
 972         if (res)
 973                 goto errexit;
 974
 975         res = 0;
 976         while ((cmd = next_cmd(&buf))) {
 977                 if (strlencmp(cmd, "enable") == 0) {
 978                         status = 1;
 979                 } else if (strlencmp(cmd, "disable") == 0) {
 980                         status = 0;
 981                 } else if (strlencmp(cmd, "reset") == 0) {
 982                         status = hotkey_orig_status;
 983                         mask = hotkey_orig_mask;
 984                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 985                         /* mask set */
 986                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 987                         /* mask set */
 988                 } else {
 989                         res = -EINVAL;
 990                         goto errexit;
 991                 }
 992                 do_cmd = 1;
 993         }
 994
 995         if (do_cmd)
 996                 res = hotkey_set(status, mask);
 997
 998 errexit:
 999         mutex_unlock(&hotkey_mutex);
1000         return res;
1001 }
1002
1003 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1004         .hid = IBM_HKEY_HID,
1005         .notify = hotkey_notify,
1006         .handle = &hkey_handle,
1007         .type = ACPI_DEVICE_NOTIFY,
1008 };
1009
1010 static struct ibm_struct hotkey_driver_data = {
1011         .name = "hotkey",
1012         .read = hotkey_read,
1013         .write = hotkey_write,
1014         .exit = hotkey_exit,
1015         .acpi = &ibm_hotkey_acpidriver,
1016 };
1017
1018 /*************************************************************************
1019  * Bluetooth subdriver
1020  */
1021
1022 /* sysfs bluetooth enable ---------------------------------------------- */
1023 static ssize_t bluetooth_enable_show(struct device *dev,
1024                            struct device_attribute *attr,
1025                            char *buf)
1026 {
1027         int status;
1028
1029         status = bluetooth_get_radiosw();
1030         if (status < 0)
1031                 return status;
1032
1033         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1034 }
1035
1036 static ssize_t bluetooth_enable_store(struct device *dev,
1037                             struct device_attribute *attr,
1038                             const char *buf, size_t count)
1039 {
1040         unsigned long t;
1041         int res;
1042
1043         if (parse_strtoul(buf, 1, &t))
1044                 return -EINVAL;
1045
1046         res = bluetooth_set_radiosw(t);
1047
1048         return (res) ? res : count;
1049 }
1050
1051 static struct device_attribute dev_attr_bluetooth_enable =
1052         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1053                 bluetooth_enable_show, bluetooth_enable_store);
1054
1055 /* --------------------------------------------------------------------- */
1056
1057 static struct attribute *bluetooth_attributes[] = {
1058         &dev_attr_bluetooth_enable.attr,
1059         NULL
1060 };
1061
1062 static const struct attribute_group bluetooth_attr_group = {
1063         .attrs = bluetooth_attributes,
1064 };
1065
1066 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1067 {
1068         int res;
1069         int status = 0;
1070
1071         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1072
1073         IBM_ACPIHANDLE_INIT(hkey);
1074
1075         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1076            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1077         tp_features.bluetooth = hkey_handle &&
1078             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1079
1080         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1081                 str_supported(tp_features.bluetooth),
1082                 status);
1083
1084         if (tp_features.bluetooth) {
1085                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1086                         /* no bluetooth hardware present in system */
1087                         tp_features.bluetooth = 0;
1088                         dbg_printk(TPACPI_DBG_INIT,
1089                                    "bluetooth hardware not installed\n");
1090                 } else {
1091                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1092                                         &bluetooth_attr_group);
1093                         if (res)
1094                                 return res;
1095                 }
1096         }
1097
1098         return (tp_features.bluetooth)? 0 : 1;
1099 }
1100
1101 static void bluetooth_exit(void)
1102 {
1103         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1104                         &bluetooth_attr_group);
1105 }
1106
1107 static int bluetooth_get_radiosw(void)
1108 {
1109         int status;
1110
1111         if (!tp_features.bluetooth)
1112                 return -ENODEV;
1113
1114         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1115                 return -EIO;
1116
1117         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1118 }
1119
1120 static int bluetooth_set_radiosw(int radio_on)
1121 {
1122         int status;
1123
1124         if (!tp_features.bluetooth)
1125                 return -ENODEV;
1126
1127         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1128                 return -EIO;
1129         if (radio_on)
1130                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1131         else
1132                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1133         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1134                 return -EIO;
1135
1136         return 0;
1137 }
1138
1139 /* procfs -------------------------------------------------------------- */
1140 static int bluetooth_read(char *p)
1141 {
1142         int len = 0;
1143         int status = bluetooth_get_radiosw();
1144
1145         if (!tp_features.bluetooth)
1146                 len += sprintf(p + len, "status:\t\tnot supported\n");
1147         else {
1148                 len += sprintf(p + len, "status:\t\t%s\n",
1149                                 (status)? "enabled" : "disabled");
1150                 len += sprintf(p + len, "commands:\tenable, disable\n");
1151         }
1152
1153         return len;
1154 }
1155
1156 static int bluetooth_write(char *buf)
1157 {
1158         char *cmd;
1159
1160         if (!tp_features.bluetooth)
1161                 return -ENODEV;
1162
1163         while ((cmd = next_cmd(&buf))) {
1164                 if (strlencmp(cmd, "enable") == 0) {
1165                         bluetooth_set_radiosw(1);
1166                 } else if (strlencmp(cmd, "disable") == 0) {
1167                         bluetooth_set_radiosw(0);
1168                 } else
1169                         return -EINVAL;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static struct ibm_struct bluetooth_driver_data = {
1176         .name = "bluetooth",
1177         .read = bluetooth_read,
1178         .write = bluetooth_write,
1179         .exit = bluetooth_exit,
1180 };
1181
1182 /*************************************************************************
1183  * Wan subdriver
1184  */
1185
1186 /* sysfs wan enable ---------------------------------------------------- */
1187 static ssize_t wan_enable_show(struct device *dev,
1188                            struct device_attribute *attr,
1189                            char *buf)
1190 {
1191         int status;
1192
1193         status = wan_get_radiosw();
1194         if (status < 0)
1195                 return status;
1196
1197         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1198 }
1199
1200 static ssize_t wan_enable_store(struct device *dev,
1201                             struct device_attribute *attr,
1202                             const char *buf, size_t count)
1203 {
1204         unsigned long t;
1205         int res;
1206
1207         if (parse_strtoul(buf, 1, &t))
1208                 return -EINVAL;
1209
1210         res = wan_set_radiosw(t);
1211
1212         return (res) ? res : count;
1213 }
1214
1215 static struct device_attribute dev_attr_wan_enable =
1216         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1217                 wan_enable_show, wan_enable_store);
1218
1219 /* --------------------------------------------------------------------- */
1220
1221 static struct attribute *wan_attributes[] = {
1222         &dev_attr_wan_enable.attr,
1223         NULL
1224 };
1225
1226 static const struct attribute_group wan_attr_group = {
1227         .attrs = wan_attributes,
1228 };
1229
1230 static int __init wan_init(struct ibm_init_struct *iibm)
1231 {
1232         int res;
1233         int status = 0;
1234
1235         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1236
1237         IBM_ACPIHANDLE_INIT(hkey);
1238
1239         tp_features.wan = hkey_handle &&
1240             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1241
1242         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1243                 str_supported(tp_features.wan),
1244                 status);
1245
1246         if (tp_features.wan) {
1247                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1248                         /* no wan hardware present in system */
1249                         tp_features.wan = 0;
1250                         dbg_printk(TPACPI_DBG_INIT,
1251                                    "wan hardware not installed\n");
1252                 } else {
1253                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1254                                         &wan_attr_group);
1255                         if (res)
1256                                 return res;
1257                 }
1258         }
1259
1260         return (tp_features.wan)? 0 : 1;
1261 }
1262
1263 static void wan_exit(void)
1264 {
1265         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1266                 &wan_attr_group);
1267 }
1268
1269 static int wan_get_radiosw(void)
1270 {
1271         int status;
1272
1273         if (!tp_features.wan)
1274                 return -ENODEV;
1275
1276         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1277                 return -EIO;
1278
1279         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1280 }
1281
1282 static int wan_set_radiosw(int radio_on)
1283 {
1284         int status;
1285
1286         if (!tp_features.wan)
1287                 return -ENODEV;
1288
1289         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1290                 return -EIO;
1291         if (radio_on)
1292                 status |= TP_ACPI_WANCARD_RADIOSSW;
1293         else
1294                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1295         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1296                 return -EIO;
1297
1298         return 0;
1299 }
1300
1301 /* procfs -------------------------------------------------------------- */
1302 static int wan_read(char *p)
1303 {
1304         int len = 0;
1305         int status = wan_get_radiosw();
1306
1307         if (!tp_features.wan)
1308                 len += sprintf(p + len, "status:\t\tnot supported\n");
1309         else {
1310                 len += sprintf(p + len, "status:\t\t%s\n",
1311                                 (status)? "enabled" : "disabled");
1312                 len += sprintf(p + len, "commands:\tenable, disable\n");
1313         }
1314
1315         return len;
1316 }
1317
1318 static int wan_write(char *buf)
1319 {
1320         char *cmd;
1321
1322         if (!tp_features.wan)
1323                 return -ENODEV;
1324
1325         while ((cmd = next_cmd(&buf))) {
1326                 if (strlencmp(cmd, "enable") == 0) {
1327                         wan_set_radiosw(1);
1328                 } else if (strlencmp(cmd, "disable") == 0) {
1329                         wan_set_radiosw(0);
1330                 } else
1331                         return -EINVAL;
1332         }
1333
1334         return 0;
1335 }
1336
1337 static struct ibm_struct wan_driver_data = {
1338         .name = "wan",
1339         .read = wan_read,
1340         .write = wan_write,
1341         .exit = wan_exit,
1342         .flags.experimental = 1,
1343 };
1344
1345 /*************************************************************************
1346  * Video subdriver
1347  */
1348
1349 static enum video_access_mode video_supported;
1350 static int video_orig_autosw;
1351
1352 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1353            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1354            "\\_SB.PCI0.VID0",   /* 770e */
1355            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1356            "\\_SB.PCI0.AGP.VID",        /* all others */
1357            );                           /* R30, R31 */
1358
1359 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1360
1361 static int __init video_init(struct ibm_init_struct *iibm)
1362 {
1363         int ivga;
1364
1365         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1366
1367         IBM_ACPIHANDLE_INIT(vid);
1368         IBM_ACPIHANDLE_INIT(vid2);
1369
1370         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1371                 /* G41, assume IVGA doesn't change */
1372                 vid_handle = vid2_handle;
1373
1374         if (!vid_handle)
1375                 /* video switching not supported on R30, R31 */
1376                 video_supported = TPACPI_VIDEO_NONE;
1377         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1378                 /* 570 */
1379                 video_supported = TPACPI_VIDEO_570;
1380         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1381                 /* 600e/x, 770e, 770x */
1382                 video_supported = TPACPI_VIDEO_770;
1383         else
1384                 /* all others */
1385                 video_supported = TPACPI_VIDEO_NEW;
1386
1387         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1388                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1389                 video_supported);
1390
1391         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1392 }
1393
1394 static void video_exit(void)
1395 {
1396         dbg_printk(TPACPI_DBG_EXIT,
1397                    "restoring original video autoswitch mode\n");
1398         if (video_autosw_set(video_orig_autosw))
1399                 printk(IBM_ERR "error while trying to restore original "
1400                         "video autoswitch mode\n");
1401 }
1402
1403 static int video_outputsw_get(void)
1404 {
1405         int status = 0;
1406         int i;
1407
1408         switch (video_supported) {
1409         case TPACPI_VIDEO_570:
1410                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1411                                  TP_ACPI_VIDEO_570_PHSCMD))
1412                         return -EIO;
1413                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1414                 break;
1415         case TPACPI_VIDEO_770:
1416                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1417                         return -EIO;
1418                 if (i)
1419                         status |= TP_ACPI_VIDEO_S_LCD;
1420                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1421                         return -EIO;
1422                 if (i)
1423                         status |= TP_ACPI_VIDEO_S_CRT;
1424                 break;
1425         case TPACPI_VIDEO_NEW:
1426                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1427                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1428                         return -EIO;
1429                 if (i)
1430                         status |= TP_ACPI_VIDEO_S_CRT;
1431
1432                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1433                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1434                         return -EIO;
1435                 if (i)
1436                         status |= TP_ACPI_VIDEO_S_LCD;
1437                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1438                         return -EIO;
1439                 if (i)
1440                         status |= TP_ACPI_VIDEO_S_DVI;
1441                 break;
1442         default:
1443                 return -ENOSYS;
1444         }
1445
1446         return status;
1447 }
1448
1449 static int video_outputsw_set(int status)
1450 {
1451         int autosw;
1452         int res = 0;
1453
1454         switch (video_supported) {
1455         case TPACPI_VIDEO_570:
1456                 res = acpi_evalf(NULL, NULL,
1457                                  "\\_SB.PHS2", "vdd",
1458                                  TP_ACPI_VIDEO_570_PHS2CMD,
1459                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1460                 break;
1461         case TPACPI_VIDEO_770:
1462                 autosw = video_autosw_get();
1463                 if (autosw < 0)
1464                         return autosw;
1465
1466                 res = video_autosw_set(1);
1467                 if (res)
1468                         return res;
1469                 res = acpi_evalf(vid_handle, NULL,
1470                                  "ASWT", "vdd", status * 0x100, 0);
1471                 if (!autosw && video_autosw_set(autosw)) {
1472                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1473                         return -EIO;
1474                 }
1475                 break;
1476         case TPACPI_VIDEO_NEW:
1477                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1478                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1479                 break;
1480         default:
1481                 return -ENOSYS;
1482         }
1483
1484         return (res)? 0 : -EIO;
1485 }
1486
1487 static int video_autosw_get(void)
1488 {
1489         int autosw = 0;
1490
1491         switch (video_supported) {
1492         case TPACPI_VIDEO_570:
1493                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1494                         return -EIO;
1495                 break;
1496         case TPACPI_VIDEO_770:
1497         case TPACPI_VIDEO_NEW:
1498                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1499                         return -EIO;
1500                 break;
1501         default:
1502                 return -ENOSYS;
1503         }
1504
1505         return autosw & 1;
1506 }
1507
1508 static int video_autosw_set(int enable)
1509 {
1510         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1511                 return -EIO;
1512         return 0;
1513 }
1514
1515 static int video_outputsw_cycle(void)
1516 {
1517         int autosw = video_autosw_get();
1518         int res;
1519
1520         if (autosw < 0)
1521                 return autosw;
1522
1523         switch (video_supported) {
1524         case TPACPI_VIDEO_570:
1525                 res = video_autosw_set(1);
1526                 if (res)
1527                         return res;
1528                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1529                 break;
1530         case TPACPI_VIDEO_770:
1531         case TPACPI_VIDEO_NEW:
1532                 res = video_autosw_set(1);
1533                 if (res)
1534                         return res;
1535                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1536                 break;
1537         default:
1538                 return -ENOSYS;
1539         }
1540         if (!autosw && video_autosw_set(autosw)) {
1541                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1542                 return -EIO;
1543         }
1544
1545         return (res)? 0 : -EIO;
1546 }
1547
1548 static int video_expand_toggle(void)
1549 {
1550         switch (video_supported) {
1551         case TPACPI_VIDEO_570:
1552                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1553                         0 : -EIO;
1554         case TPACPI_VIDEO_770:
1555                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1556                         0 : -EIO;
1557         case TPACPI_VIDEO_NEW:
1558                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1559                         0 : -EIO;
1560         default:
1561                 return -ENOSYS;
1562         }
1563         /* not reached */
1564 }
1565
1566 static int video_read(char *p)
1567 {
1568         int status, autosw;
1569         int len = 0;
1570
1571         if (video_supported == TPACPI_VIDEO_NONE) {
1572                 len += sprintf(p + len, "status:\t\tnot supported\n");
1573                 return len;
1574         }
1575
1576         status = video_outputsw_get();
1577         if (status < 0)
1578                 return status;
1579
1580         autosw = video_autosw_get();
1581         if (autosw < 0)
1582                 return autosw;
1583
1584         len += sprintf(p + len, "status:\t\tsupported\n");
1585         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1586         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1587         if (video_supported == TPACPI_VIDEO_NEW)
1588                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1589         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1590         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1591         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1592         if (video_supported == TPACPI_VIDEO_NEW)
1593                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1594         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1595         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1596
1597         return len;
1598 }
1599
1600 static int video_write(char *buf)
1601 {
1602         char *cmd;
1603         int enable, disable, status;
1604         int res;
1605
1606         if (video_supported == TPACPI_VIDEO_NONE)
1607                 return -ENODEV;
1608
1609         enable = 0;
1610         disable = 0;
1611
1612         while ((cmd = next_cmd(&buf))) {
1613                 if (strlencmp(cmd, "lcd_enable") == 0) {
1614                         enable |= TP_ACPI_VIDEO_S_LCD;
1615                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1616                         disable |= TP_ACPI_VIDEO_S_LCD;
1617                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1618                         enable |= TP_ACPI_VIDEO_S_CRT;
1619                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1620                         disable |= TP_ACPI_VIDEO_S_CRT;
1621                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1622                            strlencmp(cmd, "dvi_enable") == 0) {
1623                         enable |= TP_ACPI_VIDEO_S_DVI;
1624                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1625                            strlencmp(cmd, "dvi_disable") == 0) {
1626                         disable |= TP_ACPI_VIDEO_S_DVI;
1627                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1628                         res = video_autosw_set(1);
1629                         if (res)
1630                                 return res;
1631                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1632                         res = video_autosw_set(0);
1633                         if (res)
1634                                 return res;
1635                 } else if (strlencmp(cmd, "video_switch") == 0) {
1636                         res = video_outputsw_cycle();
1637                         if (res)
1638                                 return res;
1639                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1640                         res = video_expand_toggle();
1641                         if (res)
1642                                 return res;
1643                 } else
1644                         return -EINVAL;
1645         }
1646
1647         if (enable || disable) {
1648                 status = video_outputsw_get();
1649                 if (status < 0)
1650                         return status;
1651                 res = video_outputsw_set((status & ~disable) | enable);
1652                 if (res)
1653                         return res;
1654         }
1655
1656         return 0;
1657 }
1658
1659 static struct ibm_struct video_driver_data = {
1660         .name = "video",
1661         .read = video_read,
1662         .write = video_write,
1663         .exit = video_exit,
1664 };
1665
1666 /*************************************************************************
1667  * Light (thinklight) subdriver
1668  */
1669
1670 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1671 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1672
1673 static int __init light_init(struct ibm_init_struct *iibm)
1674 {
1675         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1676
1677         IBM_ACPIHANDLE_INIT(ledb);
1678         IBM_ACPIHANDLE_INIT(lght);
1679         IBM_ACPIHANDLE_INIT(cmos);
1680
1681         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1682         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1683
1684         if (tp_features.light)
1685                 /* light status not supported on
1686                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1687                 tp_features.light_status =
1688                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1689
1690         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1691                 str_supported(tp_features.light));
1692
1693         return (tp_features.light)? 0 : 1;
1694 }
1695
1696 static int light_read(char *p)
1697 {
1698         int len = 0;
1699         int status = 0;
1700
1701         if (!tp_features.light) {
1702                 len += sprintf(p + len, "status:\t\tnot supported\n");
1703         } else if (!tp_features.light_status) {
1704                 len += sprintf(p + len, "status:\t\tunknown\n");
1705                 len += sprintf(p + len, "commands:\ton, off\n");
1706         } else {
1707                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1708                         return -EIO;
1709                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1710                 len += sprintf(p + len, "commands:\ton, off\n");
1711         }
1712
1713         return len;
1714 }
1715
1716 static int light_write(char *buf)
1717 {
1718         int cmos_cmd, lght_cmd;
1719         char *cmd;
1720         int success;
1721
1722         if (!tp_features.light)
1723                 return -ENODEV;
1724
1725         while ((cmd = next_cmd(&buf))) {
1726                 if (strlencmp(cmd, "on") == 0) {
1727                         cmos_cmd = 0x0c;
1728                         lght_cmd = 1;
1729                 } else if (strlencmp(cmd, "off") == 0) {
1730                         cmos_cmd = 0x0d;
1731                         lght_cmd = 0;
1732                 } else
1733                         return -EINVAL;
1734
1735                 success = cmos_handle ?
1736                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1737                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1738                 if (!success)
1739                         return -EIO;
1740         }
1741
1742         return 0;
1743 }
1744
1745 static struct ibm_struct light_driver_data = {
1746         .name = "light",
1747         .read = light_read,
1748         .write = light_write,
1749 };
1750
1751 /*************************************************************************
1752  * Dock subdriver
1753  */
1754
1755 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1756
1757 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1758            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1759            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1760            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1761     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1762
1763 /* don't list other alternatives as we install a notify handler on the 570 */
1764 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1765
1766 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1767         {
1768          .notify = dock_notify,
1769          .handle = &dock_handle,
1770          .type = ACPI_SYSTEM_NOTIFY,
1771         },
1772         {
1773          .hid = IBM_PCI_HID,
1774          .notify = dock_notify,
1775          .handle = &pci_handle,
1776          .type = ACPI_SYSTEM_NOTIFY,
1777         },
1778 };
1779
1780 static struct ibm_struct dock_driver_data[2] = {
1781         {
1782          .name = "dock",
1783          .read = dock_read,
1784          .write = dock_write,
1785          .acpi = &ibm_dock_acpidriver[0],
1786         },
1787         {
1788          .name = "dock",
1789          .acpi = &ibm_dock_acpidriver[1],
1790         },
1791 };
1792
1793 #define dock_docked() (_sta(dock_handle) & 1)
1794
1795 static int __init dock_init(struct ibm_init_struct *iibm)
1796 {
1797         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1798
1799         IBM_ACPIHANDLE_INIT(dock);
1800
1801         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1802                 str_supported(dock_handle != NULL));
1803
1804         return (dock_handle)? 0 : 1;
1805 }
1806
1807 static int __init dock_init2(struct ibm_init_struct *iibm)
1808 {
1809         int dock2_needed;
1810
1811         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1812
1813         if (dock_driver_data[0].flags.acpi_driver_registered &&
1814             dock_driver_data[0].flags.acpi_notify_installed) {
1815                 IBM_ACPIHANDLE_INIT(pci);
1816                 dock2_needed = (pci_handle != NULL);
1817                 vdbg_printk(TPACPI_DBG_INIT,
1818                             "dock PCI handler for the TP 570 is %s\n",
1819                             str_supported(dock2_needed));
1820         } else {
1821                 vdbg_printk(TPACPI_DBG_INIT,
1822                 "dock subdriver part 2 not required\n");
1823                 dock2_needed = 0;
1824         }
1825
1826         return (dock2_needed)? 0 : 1;
1827 }
1828
1829 static void dock_notify(struct ibm_struct *ibm, u32 event)
1830 {
1831         int docked = dock_docked();
1832         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1833
1834         if (event == 1 && !pci) /* 570 */
1835                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1836         else if (event == 1 && pci)     /* 570 */
1837                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1838         else if (event == 3 && docked)
1839                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1840         else if (event == 3 && !docked)
1841                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1842         else if (event == 0 && docked)
1843                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1844         else {
1845                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1846                        event, _sta(dock_handle));
1847                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1848         }
1849 }
1850
1851 static int dock_read(char *p)
1852 {
1853         int len = 0;
1854         int docked = dock_docked();
1855
1856         if (!dock_handle)
1857                 len += sprintf(p + len, "status:\t\tnot supported\n");
1858         else if (!docked)
1859                 len += sprintf(p + len, "status:\t\tundocked\n");
1860         else {
1861                 len += sprintf(p + len, "status:\t\tdocked\n");
1862                 len += sprintf(p + len, "commands:\tdock, undock\n");
1863         }
1864
1865         return len;
1866 }
1867
1868 static int dock_write(char *buf)
1869 {
1870         char *cmd;
1871
1872         if (!dock_docked())
1873                 return -ENODEV;
1874
1875         while ((cmd = next_cmd(&buf))) {
1876                 if (strlencmp(cmd, "undock") == 0) {
1877                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1878                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1879                                 return -EIO;
1880                 } else if (strlencmp(cmd, "dock") == 0) {
1881                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1882                                 return -EIO;
1883                 } else
1884                         return -EINVAL;
1885         }
1886
1887         return 0;
1888 }
1889
1890 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1891
1892 /*************************************************************************
1893  * Bay subdriver
1894  */
1895
1896 #ifdef CONFIG_THINKPAD_ACPI_BAY
1897 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1898            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1899            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1900            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1901            );                           /* A21e, R30, R31 */
1902 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
1903            "_EJ0",              /* all others */
1904            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
1905 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
1906            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
1907            );                           /* all others */
1908 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
1909            "_EJ0",                      /* 770x */
1910            );                           /* all others */
1911
1912 static int __init bay_init(struct ibm_init_struct *iibm)
1913 {
1914         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
1915
1916         IBM_ACPIHANDLE_INIT(bay);
1917         if (bay_handle)
1918                 IBM_ACPIHANDLE_INIT(bay_ej);
1919         IBM_ACPIHANDLE_INIT(bay2);
1920         if (bay2_handle)
1921                 IBM_ACPIHANDLE_INIT(bay2_ej);
1922
1923         tp_features.bay_status = bay_handle &&
1924                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
1925         tp_features.bay_status2 = bay2_handle &&
1926                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
1927
1928         tp_features.bay_eject = bay_handle && bay_ej_handle &&
1929                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
1930         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
1931                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
1932
1933         vdbg_printk(TPACPI_DBG_INIT,
1934                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
1935                 str_supported(tp_features.bay_status),
1936                 str_supported(tp_features.bay_eject),
1937                 str_supported(tp_features.bay_status2),
1938                 str_supported(tp_features.bay_eject2));
1939
1940         return (tp_features.bay_status || tp_features.bay_eject ||
1941                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
1942 }
1943
1944 static void bay_notify(struct ibm_struct *ibm, u32 event)
1945 {
1946         acpi_bus_generate_event(ibm->acpi->device, event, 0);
1947 }
1948
1949 #define bay_occupied(b) (_sta(b##_handle) & 1)
1950
1951 static int bay_read(char *p)
1952 {
1953         int len = 0;
1954         int occupied = bay_occupied(bay);
1955         int occupied2 = bay_occupied(bay2);
1956         int eject, eject2;
1957
1958         len += sprintf(p + len, "status:\t\t%s\n",
1959                 tp_features.bay_status ?
1960                         (occupied ? "occupied" : "unoccupied") :
1961                                 "not supported");
1962         if (tp_features.bay_status2)
1963                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
1964                                "occupied" : "unoccupied");
1965
1966         eject = tp_features.bay_eject && occupied;
1967         eject2 = tp_features.bay_eject2 && occupied2;
1968
1969         if (eject && eject2)
1970                 len += sprintf(p + len, "commands:\teject, eject2\n");
1971         else if (eject)
1972                 len += sprintf(p + len, "commands:\teject\n");
1973         else if (eject2)
1974                 len += sprintf(p + len, "commands:\teject2\n");
1975
1976         return len;
1977 }
1978
1979 static int bay_write(char *buf)
1980 {
1981         char *cmd;
1982
1983         if (!tp_features.bay_eject && !tp_features.bay_eject2)
1984                 return -ENODEV;
1985
1986         while ((cmd = next_cmd(&buf))) {
1987                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
1988                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
1989                                 return -EIO;
1990                 } else if (tp_features.bay_eject2 &&
1991                            strlencmp(cmd, "eject2") == 0) {
1992                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
1993                                 return -EIO;
1994                 } else
1995                         return -EINVAL;
1996         }
1997
1998         return 0;
1999 }
2000
2001 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2002         .notify = bay_notify,
2003         .handle = &bay_handle,
2004         .type = ACPI_SYSTEM_NOTIFY,
2005 };
2006
2007 static struct ibm_struct bay_driver_data = {
2008         .name = "bay",
2009         .read = bay_read,
2010         .write = bay_write,
2011         .acpi = &ibm_bay_acpidriver,
2012 };
2013
2014 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2015
2016 /*************************************************************************
2017  * CMOS subdriver
2018  */
2019
2020 /* sysfs cmos_command -------------------------------------------------- */
2021 static ssize_t cmos_command_store(struct device *dev,
2022                             struct device_attribute *attr,
2023                             const char *buf, size_t count)
2024 {
2025         unsigned long cmos_cmd;
2026         int res;
2027
2028         if (parse_strtoul(buf, 21, &cmos_cmd))
2029                 return -EINVAL;
2030
2031         res = issue_thinkpad_cmos_command(cmos_cmd);
2032         return (res)? res : count;
2033 }
2034
2035 static struct device_attribute dev_attr_cmos_command =
2036         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2037
2038 /* --------------------------------------------------------------------- */
2039
2040 static int __init cmos_init(struct ibm_init_struct *iibm)
2041 {
2042         int res;
2043
2044         vdbg_printk(TPACPI_DBG_INIT,
2045                 "initializing cmos commands subdriver\n");
2046
2047         IBM_ACPIHANDLE_INIT(cmos);
2048
2049         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2050                 str_supported(cmos_handle != NULL));
2051
2052         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2053         if (res)
2054                 return res;
2055
2056         return (cmos_handle)? 0 : 1;
2057 }
2058
2059 static void cmos_exit(void)
2060 {
2061         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2062 }
2063
2064 static int cmos_read(char *p)
2065 {
2066         int len = 0;
2067
2068         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2069            R30, R31, T20-22, X20-21 */
2070         if (!cmos_handle)
2071                 len += sprintf(p + len, "status:\t\tnot supported\n");
2072         else {
2073                 len += sprintf(p + len, "status:\t\tsupported\n");
2074                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2075         }
2076
2077         return len;
2078 }
2079
2080 static int cmos_write(char *buf)
2081 {
2082         char *cmd;
2083         int cmos_cmd, res;
2084
2085         while ((cmd = next_cmd(&buf))) {
2086                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2087                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2088                         /* cmos_cmd set */
2089                 } else
2090                         return -EINVAL;
2091
2092                 res = issue_thinkpad_cmos_command(cmos_cmd);
2093                 if (res)
2094                         return res;
2095         }
2096
2097         return 0;
2098 }
2099
2100 static struct ibm_struct cmos_driver_data = {
2101         .name = "cmos",
2102         .read = cmos_read,
2103         .write = cmos_write,
2104         .exit = cmos_exit,
2105 };
2106
2107 /*************************************************************************
2108  * LED subdriver
2109  */
2110
2111 static enum led_access_mode led_supported;
2112
2113 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2114            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2115            "LED",               /* all others */
2116            );                   /* R30, R31 */
2117
2118 static int __init led_init(struct ibm_init_struct *iibm)
2119 {
2120         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2121
2122         IBM_ACPIHANDLE_INIT(led);
2123
2124         if (!led_handle)
2125                 /* led not supported on R30, R31 */
2126                 led_supported = TPACPI_LED_NONE;
2127         else if (strlencmp(led_path, "SLED") == 0)
2128                 /* 570 */
2129                 led_supported = TPACPI_LED_570;
2130         else if (strlencmp(led_path, "SYSL") == 0)
2131                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2132                 led_supported = TPACPI_LED_OLD;
2133         else
2134                 /* all others */
2135                 led_supported = TPACPI_LED_NEW;
2136
2137         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2138                 str_supported(led_supported), led_supported);
2139
2140         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2141 }
2142
2143 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2144
2145 static int led_read(char *p)
2146 {
2147         int len = 0;
2148
2149         if (!led_supported) {
2150                 len += sprintf(p + len, "status:\t\tnot supported\n");
2151                 return len;
2152         }
2153         len += sprintf(p + len, "status:\t\tsupported\n");
2154
2155         if (led_supported == TPACPI_LED_570) {
2156                 /* 570 */
2157                 int i, status;
2158                 for (i = 0; i < 8; i++) {
2159                         if (!acpi_evalf(ec_handle,
2160                                         &status, "GLED", "dd", 1 << i))
2161                                 return -EIO;
2162                         len += sprintf(p + len, "%d:\t\t%s\n",
2163                                        i, led_status(status));
2164                 }
2165         }
2166
2167         len += sprintf(p + len, "commands:\t"
2168                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2169
2170         return len;
2171 }
2172
2173 /* off, on, blink */
2174 static const int led_sled_arg1[] = { 0, 1, 3 };
2175 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2176 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2177 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2178
2179 static int led_write(char *buf)
2180 {
2181         char *cmd;
2182         int led, ind, ret;
2183
2184         if (!led_supported)
2185                 return -ENODEV;
2186
2187         while ((cmd = next_cmd(&buf))) {
2188                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2189                         return -EINVAL;
2190
2191                 if (strstr(cmd, "off")) {
2192                         ind = 0;
2193                 } else if (strstr(cmd, "on")) {
2194                         ind = 1;
2195                 } else if (strstr(cmd, "blink")) {
2196                         ind = 2;
2197                 } else
2198                         return -EINVAL;
2199
2200                 if (led_supported == TPACPI_LED_570) {
2201                         /* 570 */
2202                         led = 1 << led;
2203                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2204                                         led, led_sled_arg1[ind]))
2205                                 return -EIO;
2206                 } else if (led_supported == TPACPI_LED_OLD) {
2207                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2208                         led = 1 << led;
2209                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2210                         if (ret >= 0)
2211                                 ret =
2212                                     ec_write(TPACPI_LED_EC_HLBL,
2213                                              led * led_exp_hlbl[ind]);
2214                         if (ret >= 0)
2215                                 ret =
2216                                     ec_write(TPACPI_LED_EC_HLCL,
2217                                              led * led_exp_hlcl[ind]);
2218                         if (ret < 0)
2219                                 return ret;
2220                 } else {
2221                         /* all others */
2222                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2223                                         led, led_led_arg1[ind]))
2224                                 return -EIO;
2225                 }
2226         }
2227
2228         return 0;
2229 }
2230
2231 static struct ibm_struct led_driver_data = {
2232         .name = "led",
2233         .read = led_read,
2234         .write = led_write,
2235 };
2236
2237 /*************************************************************************
2238  * Beep subdriver
2239  */
2240
2241 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2242
2243 static int __init beep_init(struct ibm_init_struct *iibm)
2244 {
2245         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2246
2247         IBM_ACPIHANDLE_INIT(beep);
2248
2249         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2250                 str_supported(beep_handle != NULL));
2251
2252         return (beep_handle)? 0 : 1;
2253 }
2254
2255 static int beep_read(char *p)
2256 {
2257         int len = 0;
2258
2259         if (!beep_handle)
2260                 len += sprintf(p + len, "status:\t\tnot supported\n");
2261         else {
2262                 len += sprintf(p + len, "status:\t\tsupported\n");
2263                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2264         }
2265
2266         return len;
2267 }
2268
2269 static int beep_write(char *buf)
2270 {
2271         char *cmd;
2272         int beep_cmd;
2273
2274         if (!beep_handle)
2275                 return -ENODEV;
2276
2277         while ((cmd = next_cmd(&buf))) {
2278                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2279                     beep_cmd >= 0 && beep_cmd <= 17) {
2280                         /* beep_cmd set */
2281                 } else
2282                         return -EINVAL;
2283                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2284                         return -EIO;
2285         }
2286
2287         return 0;
2288 }
2289
2290 static struct ibm_struct beep_driver_data = {
2291         .name = "beep",
2292         .read = beep_read,
2293         .write = beep_write,
2294 };
2295
2296 /*************************************************************************
2297  * Thermal subdriver
2298  */
2299
2300 static enum thermal_access_mode thermal_read_mode;
2301
2302 /* sysfs temp##_input -------------------------------------------------- */
2303
2304 static ssize_t thermal_temp_input_show(struct device *dev,
2305                            struct device_attribute *attr,
2306                            char *buf)
2307 {
2308         struct sensor_device_attribute *sensor_attr =
2309                                         to_sensor_dev_attr(attr);
2310         int idx = sensor_attr->index;
2311         s32 value;
2312         int res;
2313
2314         res = thermal_get_sensor(idx, &value);
2315         if (res)
2316                 return res;
2317         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2318                 return -ENXIO;
2319
2320         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2321 }
2322
2323 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2324          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2325
2326 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2327         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2328         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2329         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2330         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2331         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2332         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2333         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2334         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2335         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2336         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2337         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2338         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2339         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2340         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2341         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2342         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2343 };
2344
2345 #define THERMAL_ATTRS(X) \
2346         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2347
2348 static struct attribute *thermal_temp_input_attr[] = {
2349         THERMAL_ATTRS(8),
2350         THERMAL_ATTRS(9),
2351         THERMAL_ATTRS(10),
2352         THERMAL_ATTRS(11),
2353         THERMAL_ATTRS(12),
2354         THERMAL_ATTRS(13),
2355         THERMAL_ATTRS(14),
2356         THERMAL_ATTRS(15),
2357         THERMAL_ATTRS(0),
2358         THERMAL_ATTRS(1),
2359         THERMAL_ATTRS(2),
2360         THERMAL_ATTRS(3),
2361         THERMAL_ATTRS(4),
2362         THERMAL_ATTRS(5),
2363         THERMAL_ATTRS(6),
2364         THERMAL_ATTRS(7),
2365         NULL
2366 };
2367
2368 static const struct attribute_group thermal_temp_input16_group = {
2369         .attrs = thermal_temp_input_attr
2370 };
2371
2372 static const struct attribute_group thermal_temp_input8_group = {
2373         .attrs = &thermal_temp_input_attr[8]
2374 };
2375
2376 #undef THERMAL_SENSOR_ATTR_TEMP
2377 #undef THERMAL_ATTRS
2378
2379 /* --------------------------------------------------------------------- */
2380
2381 static int __init thermal_init(struct ibm_init_struct *iibm)
2382 {
2383         u8 t, ta1, ta2;
2384         int i;
2385         int acpi_tmp7;
2386         int res;
2387
2388         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2389
2390         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2391
2392         if (ibm_thinkpad_ec_found && experimental) {
2393                 /*
2394                  * Direct EC access mode: sensors at registers
2395                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2396                  * non-implemented, thermal sensors return 0x80 when
2397                  * not available
2398                  */
2399
2400                 ta1 = ta2 = 0;
2401                 for (i = 0; i < 8; i++) {
2402                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2403                                 ta1 |= t;
2404                         } else {
2405                                 ta1 = 0;
2406                                 break;
2407                         }
2408                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2409                                 ta2 |= t;
2410                         } else {
2411                                 ta1 = 0;
2412                                 break;
2413                         }
2414                 }
2415                 if (ta1 == 0) {
2416                         /* This is sheer paranoia, but we handle it anyway */
2417                         if (acpi_tmp7) {
2418                                 printk(IBM_ERR
2419                                        "ThinkPad ACPI EC access misbehaving, "
2420                                        "falling back to ACPI TMPx access mode\n");
2421                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2422                         } else {
2423                                 printk(IBM_ERR
2424                                        "ThinkPad ACPI EC access misbehaving, "
2425                                        "disabling thermal sensors access\n");
2426                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2427                         }
2428                 } else {
2429                         thermal_read_mode =
2430                             (ta2 != 0) ?
2431                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2432                 }
2433         } else if (acpi_tmp7) {
2434                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2435                         /* 600e/x, 770e, 770x */
2436                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2437                 } else {
2438                         /* Standard ACPI TMPx access, max 8 sensors */
2439                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2440                 }
2441         } else {
2442                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2443                 thermal_read_mode = TPACPI_THERMAL_NONE;
2444         }
2445
2446         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2447                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2448                 thermal_read_mode);
2449
2450         switch(thermal_read_mode) {
2451         case TPACPI_THERMAL_TPEC_16:
2452                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2453                                 &thermal_temp_input16_group);
2454                 if (res)
2455                         return res;
2456                 break;
2457         case TPACPI_THERMAL_TPEC_8:
2458         case TPACPI_THERMAL_ACPI_TMP07:
2459         case TPACPI_THERMAL_ACPI_UPDT:
2460                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2461                                 &thermal_temp_input8_group);
2462                 if (res)
2463                         return res;
2464                 break;
2465         case TPACPI_THERMAL_NONE:
2466         default:
2467                 return 1;
2468         }
2469
2470         return 0;
2471 }
2472
2473 static void thermal_exit(void)
2474 {
2475         switch(thermal_read_mode) {
2476         case TPACPI_THERMAL_TPEC_16:
2477                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2478                                    &thermal_temp_input16_group);
2479                 break;
2480         case TPACPI_THERMAL_TPEC_8:
2481         case TPACPI_THERMAL_ACPI_TMP07:
2482         case TPACPI_THERMAL_ACPI_UPDT:
2483                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2484                                    &thermal_temp_input16_group);
2485                 break;
2486         case TPACPI_THERMAL_NONE:
2487         default:
2488                 break;
2489         }
2490 }
2491
2492 /* idx is zero-based */
2493 static int thermal_get_sensor(int idx, s32 *value)
2494 {
2495         int t;
2496         s8 tmp;
2497         char tmpi[5];
2498
2499         t = TP_EC_THERMAL_TMP0;
2500
2501         switch (thermal_read_mode) {
2502 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2503         case TPACPI_THERMAL_TPEC_16:
2504                 if (idx >= 8 && idx <= 15) {
2505                         t = TP_EC_THERMAL_TMP8;
2506                         idx -= 8;
2507                 }
2508                 /* fallthrough */
2509 #endif
2510         case TPACPI_THERMAL_TPEC_8:
2511                 if (idx <= 7) {
2512                         if (!acpi_ec_read(t + idx, &tmp))
2513                                 return -EIO;
2514                         *value = tmp * 1000;
2515                         return 0;
2516                 }
2517                 break;
2518
2519         case TPACPI_THERMAL_ACPI_UPDT:
2520                 if (idx <= 7) {
2521                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2522                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2523                                 return -EIO;
2524                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2525                                 return -EIO;
2526                         *value = (t - 2732) * 100;
2527                         return 0;
2528                 }
2529                 break;
2530
2531         case TPACPI_THERMAL_ACPI_TMP07:
2532                 if (idx <= 7) {
2533                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2534                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2535                                 return -EIO;
2536                         *value = t * 1000;
2537                         return 0;
2538                 }
2539                 break;
2540
2541         case TPACPI_THERMAL_NONE:
2542         default:
2543                 return -ENOSYS;
2544         }
2545
2546         return -EINVAL;
2547 }
2548
2549 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2550 {
2551         int res, i;
2552         int n;
2553
2554         n = 8;
2555         i = 0;
2556
2557         if (!s)
2558                 return -EINVAL;
2559
2560         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2561                 n = 16;
2562
2563         for(i = 0 ; i < n; i++) {
2564                 res = thermal_get_sensor(i, &s->temp[i]);
2565                 if (res)
2566                         return res;
2567         }
2568
2569         return n;
2570 }
2571
2572 static int thermal_read(char *p)
2573 {
2574         int len = 0;
2575         int n, i;
2576         struct ibm_thermal_sensors_struct t;
2577
2578         n = thermal_get_sensors(&t);
2579         if (unlikely(n < 0))
2580                 return n;
2581
2582         len += sprintf(p + len, "temperatures:\t");
2583
2584         if (n > 0) {
2585                 for (i = 0; i < (n - 1); i++)
2586                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2587                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2588         } else
2589                 len += sprintf(p + len, "not supported\n");
2590
2591         return len;
2592 }
2593
2594 static struct ibm_struct thermal_driver_data = {
2595         .name = "thermal",
2596         .read = thermal_read,
2597         .exit = thermal_exit,
2598 };
2599
2600 /*************************************************************************
2601  * EC Dump subdriver
2602  */
2603
2604 static u8 ecdump_regs[256];
2605
2606 static int ecdump_read(char *p)
2607 {
2608         int len = 0;
2609         int i, j;
2610         u8 v;
2611
2612         len += sprintf(p + len, "EC      "
2613                        " +00 +01 +02 +03 +04 +05 +06 +07"
2614                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2615         for (i = 0; i < 256; i += 16) {
2616                 len += sprintf(p + len, "EC 0x%02x:", i);
2617                 for (j = 0; j < 16; j++) {
2618                         if (!acpi_ec_read(i + j, &v))
2619                                 break;
2620                         if (v != ecdump_regs[i + j])
2621                                 len += sprintf(p + len, " *%02x", v);
2622                         else
2623                                 len += sprintf(p + len, "  %02x", v);
2624                         ecdump_regs[i + j] = v;
2625                 }
2626                 len += sprintf(p + len, "\n");
2627                 if (j != 16)
2628                         break;
2629         }
2630
2631         /* These are way too dangerous to advertise openly... */
2632 #if 0
2633         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2634                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2635         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2636                        " (<offset> is 00-ff, <value> is 0-255)\n");
2637 #endif
2638         return len;
2639 }
2640
2641 static int ecdump_write(char *buf)
2642 {
2643         char *cmd;
2644         int i, v;
2645
2646         while ((cmd = next_cmd(&buf))) {
2647                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2648                         /* i and v set */
2649                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2650                         /* i and v set */
2651                 } else
2652                         return -EINVAL;
2653                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2654                         if (!acpi_ec_write(i, v))
2655                                 return -EIO;
2656                 } else
2657                         return -EINVAL;
2658         }
2659
2660         return 0;
2661 }
2662
2663 static struct ibm_struct ecdump_driver_data = {
2664         .name = "ecdump",
2665         .read = ecdump_read,
2666         .write = ecdump_write,
2667         .flags.experimental = 1,
2668 };
2669
2670 /*************************************************************************
2671  * Backlight/brightness subdriver
2672  */
2673
2674 static struct backlight_device *ibm_backlight_device = NULL;
2675
2676 static struct backlight_ops ibm_backlight_data = {
2677         .get_brightness = brightness_get,
2678         .update_status  = brightness_update_status,
2679 };
2680
2681 static int __init brightness_init(struct ibm_init_struct *iibm)
2682 {
2683         int b;
2684
2685         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2686
2687         b = brightness_get(NULL);
2688         if (b < 0)
2689                 return b;
2690
2691         ibm_backlight_device = backlight_device_register(
2692                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2693                                         &ibm_backlight_data);
2694         if (IS_ERR(ibm_backlight_device)) {
2695                 printk(IBM_ERR "Could not register backlight device\n");
2696                 return PTR_ERR(ibm_backlight_device);
2697         }
2698         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2699
2700         ibm_backlight_device->props.max_brightness = 7;
2701         ibm_backlight_device->props.brightness = b;
2702         backlight_update_status(ibm_backlight_device);
2703
2704         return 0;
2705 }
2706
2707 static void brightness_exit(void)
2708 {
2709         if (ibm_backlight_device) {
2710                 vdbg_printk(TPACPI_DBG_EXIT,
2711                             "calling backlight_device_unregister()\n");
2712                 backlight_device_unregister(ibm_backlight_device);
2713                 ibm_backlight_device = NULL;
2714         }
2715 }
2716
2717 static int brightness_update_status(struct backlight_device *bd)
2718 {
2719         return brightness_set(
2720                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2721                  bd->props.power == FB_BLANK_UNBLANK) ?
2722                                 bd->props.brightness : 0);
2723 }
2724
2725 static int brightness_get(struct backlight_device *bd)
2726 {
2727         u8 level;
2728         if (!acpi_ec_read(brightness_offset, &level))
2729                 return -EIO;
2730
2731         level &= 0x7;
2732
2733         return level;
2734 }
2735
2736 static int brightness_set(int value)
2737 {
2738         int cmos_cmd, inc, i;
2739         int current_value = brightness_get(NULL);
2740
2741         value &= 7;
2742
2743         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2744         inc = value > current_value ? 1 : -1;
2745         for (i = current_value; i != value; i += inc) {
2746                 if (issue_thinkpad_cmos_command(cmos_cmd))
2747                         return -EIO;
2748                 if (!acpi_ec_write(brightness_offset, i + inc))
2749                         return -EIO;
2750         }
2751
2752         return 0;
2753 }
2754
2755 static int brightness_read(char *p)
2756 {
2757         int len = 0;
2758         int level;
2759
2760         if ((level = brightness_get(NULL)) < 0) {
2761                 len += sprintf(p + len, "level:\t\tunreadable\n");
2762         } else {
2763                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2764                 len += sprintf(p + len, "commands:\tup, down\n");
2765                 len += sprintf(p + len, "commands:\tlevel <level>"
2766                                " (<level> is 0-7)\n");
2767         }
2768
2769         return len;
2770 }
2771
2772 static int brightness_write(char *buf)
2773 {
2774         int level;
2775         int new_level;
2776         char *cmd;
2777
2778         while ((cmd = next_cmd(&buf))) {
2779                 if ((level = brightness_get(NULL)) < 0)
2780                         return level;
2781                 level &= 7;
2782
2783                 if (strlencmp(cmd, "up") == 0) {
2784                         new_level = level == 7 ? 7 : level + 1;
2785                 } else if (strlencmp(cmd, "down") == 0) {
2786                         new_level = level == 0 ? 0 : level - 1;
2787                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2788                            new_level >= 0 && new_level <= 7) {
2789                         /* new_level set */
2790                 } else
2791                         return -EINVAL;
2792
2793                 brightness_set(new_level);
2794         }
2795
2796         return 0;
2797 }
2798
2799 static struct ibm_struct brightness_driver_data = {
2800         .name = "brightness",
2801         .read = brightness_read,
2802         .write = brightness_write,
2803         .exit = brightness_exit,
2804 };
2805
2806 /*************************************************************************
2807  * Volume subdriver
2808  */
2809
2810 static int volume_read(char *p)
2811 {
2812         int len = 0;
2813         u8 level;
2814
2815         if (!acpi_ec_read(volume_offset, &level)) {
2816                 len += sprintf(p + len, "level:\t\tunreadable\n");
2817         } else {
2818                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2819                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2820                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2821                 len += sprintf(p + len, "commands:\tlevel <level>"
2822                                " (<level> is 0-15)\n");
2823         }
2824
2825         return len;
2826 }
2827
2828 static int volume_write(char *buf)
2829 {
2830         int cmos_cmd, inc, i;
2831         u8 level, mute;
2832         int new_level, new_mute;
2833         char *cmd;
2834
2835         while ((cmd = next_cmd(&buf))) {
2836                 if (!acpi_ec_read(volume_offset, &level))
2837                         return -EIO;
2838                 new_mute = mute = level & 0x40;
2839                 new_level = level = level & 0xf;
2840
2841                 if (strlencmp(cmd, "up") == 0) {
2842                         if (mute)
2843                                 new_mute = 0;
2844                         else
2845                                 new_level = level == 15 ? 15 : level + 1;
2846                 } else if (strlencmp(cmd, "down") == 0) {
2847                         if (mute)
2848                                 new_mute = 0;
2849                         else
2850                                 new_level = level == 0 ? 0 : level - 1;
2851                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2852                            new_level >= 0 && new_level <= 15) {
2853                         /* new_level set */
2854                 } else if (strlencmp(cmd, "mute") == 0) {
2855                         new_mute = 0x40;
2856                 } else
2857                         return -EINVAL;
2858
2859                 if (new_level != level) {       /* mute doesn't change */
2860                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2861                         inc = new_level > level ? 1 : -1;
2862
2863                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2864                                      !acpi_ec_write(volume_offset, level)))
2865                                 return -EIO;
2866
2867                         for (i = level; i != new_level; i += inc)
2868                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2869                                     !acpi_ec_write(volume_offset, i + inc))
2870                                         return -EIO;
2871
2872                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2873                                      !acpi_ec_write(volume_offset,
2874                                                     new_level + mute)))
2875                                 return -EIO;
2876                 }
2877
2878                 if (new_mute != mute) { /* level doesn't change */
2879                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2880
2881                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
2882                             !acpi_ec_write(volume_offset, level + new_mute))
2883                                 return -EIO;
2884                 }
2885         }
2886
2887         return 0;
2888 }
2889
2890 static struct ibm_struct volume_driver_data = {
2891         .name = "volume",
2892         .read = volume_read,
2893         .write = volume_write,
2894 };
2895
2896 /*************************************************************************
2897  * Fan subdriver
2898  */
2899
2900 /*
2901  * FAN ACCESS MODES
2902  *
2903  * TPACPI_FAN_RD_ACPI_GFAN:
2904  *      ACPI GFAN method: returns fan level
2905  *
2906  *      see TPACPI_FAN_WR_ACPI_SFAN
2907  *      EC 0x2f (HFSP) not available if GFAN exists
2908  *
2909  * TPACPI_FAN_WR_ACPI_SFAN:
2910  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
2911  *
2912  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
2913  *      it for writing.
2914  *
2915  * TPACPI_FAN_WR_TPEC:
2916  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
2917  *      Supported on almost all ThinkPads
2918  *
2919  *      Fan speed changes of any sort (including those caused by the
2920  *      disengaged mode) are usually done slowly by the firmware as the
2921  *      maximum ammount of fan duty cycle change per second seems to be
2922  *      limited.
2923  *
2924  *      Reading is not available if GFAN exists.
2925  *      Writing is not available if SFAN exists.
2926  *
2927  *      Bits
2928  *       7      automatic mode engaged;
2929  *              (default operation mode of the ThinkPad)
2930  *              fan level is ignored in this mode.
2931  *       6      full speed mode (takes precedence over bit 7);
2932  *              not available on all thinkpads.  May disable
2933  *              the tachometer while the fan controller ramps up
2934  *              the speed (which can take up to a few *minutes*).
2935  *              Speeds up fan to 100% duty-cycle, which is far above
2936  *              the standard RPM levels.  It is not impossible that
2937  *              it could cause hardware damage.
2938  *      5-3     unused in some models.  Extra bits for fan level
2939  *              in others, but still useless as all values above
2940  *              7 map to the same speed as level 7 in these models.
2941  *      2-0     fan level (0..7 usually)
2942  *                      0x00 = stop
2943  *                      0x07 = max (set when temperatures critical)
2944  *              Some ThinkPads may have other levels, see
2945  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
2946  *
2947  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
2948  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
2949  *      does so, its initial value is meaningless (0x07).
2950  *
2951  *      For firmware bugs, refer to:
2952  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2953  *
2954  *      ----
2955  *
2956  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
2957  *      Main fan tachometer reading (in RPM)
2958  *
2959  *      This register is present on all ThinkPads with a new-style EC, and
2960  *      it is known not to be present on the A21m/e, and T22, as there is
2961  *      something else in offset 0x84 according to the ACPI DSDT.  Other
2962  *      ThinkPads from this same time period (and earlier) probably lack the
2963  *      tachometer as well.
2964  *
2965  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
2966  *      was never fixed by IBM to report the EC firmware version string
2967  *      probably support the tachometer (like the early X models), so
2968  *      detecting it is quite hard.  We need more data to know for sure.
2969  *
2970  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
2971  *      might result.
2972  *
2973  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
2974  *      mode.
2975  *
2976  *      For firmware bugs, refer to:
2977  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
2978  *
2979  * TPACPI_FAN_WR_ACPI_FANS:
2980  *      ThinkPad X31, X40, X41.  Not available in the X60.
2981  *
2982  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
2983  *      high speed.  ACPI DSDT seems to map these three speeds to levels
2984  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
2985  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
2986  *
2987  *      The speeds are stored on handles
2988  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
2989  *
2990  *      There are three default speed sets, acessible as handles:
2991  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
2992  *
2993  *      ACPI DSDT switches which set is in use depending on various
2994  *      factors.
2995  *
2996  *      TPACPI_FAN_WR_TPEC is also available and should be used to
2997  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
2998  *      but the ACPI tables just mention level 7.
2999  */
3000
3001 static enum fan_status_access_mode fan_status_access_mode;
3002 static enum fan_control_access_mode fan_control_access_mode;
3003 static enum fan_control_commands fan_control_commands;
3004
3005 static u8 fan_control_initial_status;
3006 static u8 fan_control_desired_level;
3007
3008 static void fan_watchdog_fire(struct work_struct *ignored);
3009 static int fan_watchdog_maxinterval;
3010 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3011
3012 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3013 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3014            "\\FSPD",            /* 600e/x, 770e, 770x */
3015            );                   /* all others */
3016 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3017            "JFNS",              /* 770x-JL */
3018            );                   /* all others */
3019
3020 /*
3021  * SYSFS fan layout: hwmon compatible (device)
3022  *
3023  * pwm*_enable:
3024  *      0: "disengaged" mode
3025  *      1: manual mode
3026  *      2: native EC "auto" mode (recommended, hardware default)
3027  *
3028  * pwm*: set speed in manual mode, ignored otherwise.
3029  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3030  *      interpolation.
3031  *
3032  * fan*_input: tachometer reading, RPM
3033  *
3034  *
3035  * SYSFS fan layout: extensions
3036  *
3037  * fan_watchdog (driver):
3038  *      fan watchdog interval in seconds, 0 disables (default), max 120
3039  */
3040
3041 /* sysfs fan pwm1_enable ----------------------------------------------- */
3042 static ssize_t fan_pwm1_enable_show(struct device *dev,
3043                                     struct device_attribute *attr,
3044                                     char *buf)
3045 {
3046         int res, mode;
3047         u8 status;
3048
3049         res = fan_get_status_safe(&status);
3050         if (res)
3051                 return res;
3052
3053         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3054                 if (status != fan_control_initial_status) {
3055                         tp_features.fan_ctrl_status_undef = 0;
3056                 } else {
3057                         /* Return most likely status. In fact, it
3058                          * might be the only possible status */
3059                         status = TP_EC_FAN_AUTO;
3060                 }
3061         }
3062
3063         if (status & TP_EC_FAN_FULLSPEED) {
3064                 mode = 0;
3065         } else if (status & TP_EC_FAN_AUTO) {
3066                 mode = 2;
3067         } else
3068                 mode = 1;
3069
3070         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3071 }
3072
3073 static ssize_t fan_pwm1_enable_store(struct device *dev,
3074                                      struct device_attribute *attr,
3075                                      const char *buf, size_t count)
3076 {
3077         unsigned long t;
3078         int res, level;
3079
3080         if (parse_strtoul(buf, 2, &t))
3081                 return -EINVAL;
3082
3083         switch (t) {
3084         case 0:
3085                 level = TP_EC_FAN_FULLSPEED;
3086                 break;
3087         case 1:
3088                 level = TPACPI_FAN_LAST_LEVEL;
3089                 break;
3090         case 2:
3091                 level = TP_EC_FAN_AUTO;
3092                 break;
3093         case 3:
3094                 /* reserved for software-controlled auto mode */
3095                 return -ENOSYS;
3096         default:
3097                 return -EINVAL;
3098         }
3099
3100         res = fan_set_level_safe(level);
3101         if (res == -ENXIO)
3102                 return -EINVAL;
3103         else if (res < 0)
3104                 return res;
3105
3106         fan_watchdog_reset();
3107
3108         return count;
3109 }
3110
3111 static struct device_attribute dev_attr_fan_pwm1_enable =
3112         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3113                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3114
3115 /* sysfs fan pwm1 ------------------------------------------------------ */
3116 static ssize_t fan_pwm1_show(struct device *dev,
3117                              struct device_attribute *attr,
3118                              char *buf)
3119 {
3120         int res;
3121         u8 status;
3122
3123         res = fan_get_status_safe(&status);
3124         if (res)
3125                 return res;
3126
3127         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3128                 if (status != fan_control_initial_status) {
3129                         tp_features.fan_ctrl_status_undef = 0;
3130                 } else {
3131                         status = TP_EC_FAN_AUTO;
3132                 }
3133         }
3134
3135         if ((status &
3136              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3137                 status = fan_control_desired_level;
3138
3139         if (status > 7)
3140                 status = 7;
3141
3142         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3143 }
3144
3145 static ssize_t fan_pwm1_store(struct device *dev,
3146                               struct device_attribute *attr,
3147                               const char *buf, size_t count)
3148 {
3149         unsigned long s;
3150         int rc;
3151         u8 status, newlevel;
3152
3153         if (parse_strtoul(buf, 255, &s))
3154                 return -EINVAL;
3155
3156         /* scale down from 0-255 to 0-7 */
3157         newlevel = (s >> 5) & 0x07;
3158
3159         rc = mutex_lock_interruptible(&fan_mutex);
3160         if (rc < 0)
3161                 return rc;
3162
3163         rc = fan_get_status(&status);
3164         if (!rc && (status &
3165                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3166                 rc = fan_set_level(newlevel);
3167                 if (rc == -ENXIO)
3168                         rc = -EINVAL;
3169                 else if (!rc) {
3170                         fan_update_desired_level(newlevel);
3171                         fan_watchdog_reset();
3172                 }
3173         }
3174
3175         mutex_unlock(&fan_mutex);
3176         return (rc)? rc : count;
3177 }
3178
3179 static struct device_attribute dev_attr_fan_pwm1 =
3180         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3181                 fan_pwm1_show, fan_pwm1_store);
3182
3183 /* sysfs fan fan1_input ------------------------------------------------ */
3184 static ssize_t fan_fan1_input_show(struct device *dev,
3185                            struct device_attribute *attr,
3186                            char *buf)
3187 {
3188         int res;
3189         unsigned int speed;
3190
3191         res = fan_get_speed(&speed);
3192         if (res < 0)
3193                 return res;
3194
3195         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3196 }
3197
3198 static struct device_attribute dev_attr_fan_fan1_input =
3199         __ATTR(fan1_input, S_IRUGO,
3200                 fan_fan1_input_show, NULL);
3201
3202 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3203 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3204                                      char *buf)
3205 {
3206         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3207 }
3208
3209 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3210                                       const char *buf, size_t count)
3211 {
3212         unsigned long t;
3213
3214         if (parse_strtoul(buf, 120, &t))
3215                 return -EINVAL;
3216
3217         if (!fan_control_allowed)
3218                 return -EPERM;
3219
3220         fan_watchdog_maxinterval = t;
3221         fan_watchdog_reset();
3222
3223         return count;
3224 }
3225
3226 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3227                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3228
3229 /* --------------------------------------------------------------------- */
3230 static struct attribute *fan_attributes[] = {
3231         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3232         &dev_attr_fan_fan1_input.attr,
3233         NULL
3234 };
3235
3236 static const struct attribute_group fan_attr_group = {
3237         .attrs = fan_attributes,
3238 };
3239
3240 static int __init fan_init(struct ibm_init_struct *iibm)
3241 {
3242         int rc;
3243
3244         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3245
3246         mutex_init(&fan_mutex);
3247         fan_status_access_mode = TPACPI_FAN_NONE;
3248         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3249         fan_control_commands = 0;
3250         fan_watchdog_maxinterval = 0;
3251         tp_features.fan_ctrl_status_undef = 0;
3252         fan_control_desired_level = 7;
3253
3254         IBM_ACPIHANDLE_INIT(fans);
3255         IBM_ACPIHANDLE_INIT(gfan);
3256         IBM_ACPIHANDLE_INIT(sfan);
3257
3258         if (gfan_handle) {
3259                 /* 570, 600e/x, 770e, 770x */
3260                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3261         } else {
3262                 /* all other ThinkPads: note that even old-style
3263                  * ThinkPad ECs supports the fan control register */
3264                 if (likely(acpi_ec_read(fan_status_offset,
3265                                         &fan_control_initial_status))) {
3266                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3267
3268                         /* In some ThinkPads, neither the EC nor the ACPI
3269                          * DSDT initialize the fan status, and it ends up
3270                          * being set to 0x07 when it *could* be either
3271                          * 0x07 or 0x80.
3272                          *
3273                          * Enable for TP-1Y (T43), TP-78 (R51e),
3274                          * TP-76 (R52), TP-70 (T43, R52), which are known
3275                          * to be buggy. */
3276                         if (fan_control_initial_status == 0x07 &&
3277                             ibm_thinkpad_ec_found &&
3278                             ((ibm_thinkpad_ec_found[0] == '1' &&
3279                               ibm_thinkpad_ec_found[1] == 'Y') ||
3280                              (ibm_thinkpad_ec_found[0] == '7' &&
3281                               (ibm_thinkpad_ec_found[1] == '6' ||
3282                                ibm_thinkpad_ec_found[1] == '8' ||
3283                                ibm_thinkpad_ec_found[1] == '0'))
3284                             )) {
3285                                 printk(IBM_NOTICE
3286                                        "fan_init: initial fan status is "
3287                                        "unknown, assuming it is in auto "
3288                                        "mode\n");
3289                                 tp_features.fan_ctrl_status_undef = 1;
3290                         }
3291                 } else {
3292                         printk(IBM_ERR
3293                                "ThinkPad ACPI EC access misbehaving, "
3294                                "fan status and control unavailable\n");
3295                         return 1;
3296                 }
3297         }
3298
3299         if (sfan_handle) {
3300                 /* 570, 770x-JL */
3301                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3302                 fan_control_commands |=
3303                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3304         } else {
3305                 if (!gfan_handle) {
3306                         /* gfan without sfan means no fan control */
3307                         /* all other models implement TP EC 0x2f control */
3308
3309                         if (fans_handle) {
3310                                 /* X31, X40, X41 */
3311                                 fan_control_access_mode =
3312                                     TPACPI_FAN_WR_ACPI_FANS;
3313                                 fan_control_commands |=
3314                                     TPACPI_FAN_CMD_SPEED |
3315                                     TPACPI_FAN_CMD_LEVEL |
3316                                     TPACPI_FAN_CMD_ENABLE;
3317                         } else {
3318                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3319                                 fan_control_commands |=
3320                                     TPACPI_FAN_CMD_LEVEL |
3321                                     TPACPI_FAN_CMD_ENABLE;
3322                         }
3323                 }
3324         }
3325
3326         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3327                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3328                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3329                 fan_status_access_mode, fan_control_access_mode);
3330
3331         /* fan control master switch */
3332         if (!fan_control_allowed) {
3333                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3334                 fan_control_commands = 0;
3335                 dbg_printk(TPACPI_DBG_INIT,
3336                            "fan control features disabled by parameter\n");
3337         }
3338
3339         /* update fan_control_desired_level */
3340         if (fan_status_access_mode != TPACPI_FAN_NONE)
3341                 fan_get_status_safe(NULL);
3342
3343         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3344             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3345                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3346                                          &fan_attr_group);
3347                 if (!(rc < 0))
3348                         rc = driver_create_file(&tpacpi_pdriver.driver,
3349                                         &driver_attr_fan_watchdog);
3350                 if (rc < 0)
3351                         return rc;
3352                 return 0;
3353         } else
3354                 return 1;
3355 }
3356
3357 /*
3358  * Call with fan_mutex held
3359  */
3360 static void fan_update_desired_level(u8 status)
3361 {
3362         if ((status &
3363              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3364                 if (status > 7)
3365                         fan_control_desired_level = 7;
3366                 else
3367                         fan_control_desired_level = status;
3368         }
3369 }
3370
3371 static int fan_get_status(u8 *status)
3372 {
3373         u8 s;
3374
3375         /* TODO:
3376          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3377
3378         switch (fan_status_access_mode) {
3379         case TPACPI_FAN_RD_ACPI_GFAN:
3380                 /* 570, 600e/x, 770e, 770x */
3381
3382                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3383                         return -EIO;
3384
3385                 if (likely(status))
3386                         *status = s & 0x07;
3387
3388                 break;
3389
3390         case TPACPI_FAN_RD_TPEC:
3391                 /* all except 570, 600e/x, 770e, 770x */
3392                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3393                         return -EIO;
3394
3395                 if (likely(status))
3396                         *status = s;
3397
3398                 break;
3399
3400         default:
3401                 return -ENXIO;
3402         }
3403
3404         return 0;
3405 }
3406
3407 static int fan_get_status_safe(u8 *status)
3408 {
3409         int rc;
3410         u8 s;
3411
3412         rc = mutex_lock_interruptible(&fan_mutex);
3413         if (rc < 0)
3414                 return rc;
3415         rc = fan_get_status(&s);
3416         if (!rc)
3417                 fan_update_desired_level(s);
3418         mutex_unlock(&fan_mutex);
3419
3420         if (status)
3421                 *status = s;
3422
3423         return rc;
3424 }
3425
3426 static void fan_exit(void)
3427 {
3428         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3429
3430         /* FIXME: can we really do this unconditionally? */
3431         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3432         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3433
3434         cancel_delayed_work(&fan_watchdog_task);
3435         flush_scheduled_work();
3436 }
3437
3438 static int fan_get_speed(unsigned int *speed)
3439 {
3440         u8 hi, lo;
3441
3442         switch (fan_status_access_mode) {
3443         case TPACPI_FAN_RD_TPEC:
3444                 /* all except 570, 600e/x, 770e, 770x */
3445                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3446                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3447                         return -EIO;
3448
3449                 if (likely(speed))
3450                         *speed = (hi << 8) | lo;
3451
3452                 break;
3453
3454         default:
3455                 return -ENXIO;
3456         }
3457
3458         return 0;
3459 }
3460
3461 static void fan_watchdog_fire(struct work_struct *ignored)
3462 {
3463         int rc;
3464
3465         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3466         rc = fan_set_enable();
3467         if (rc < 0) {
3468                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3469                         "will try again later...\n", -rc);
3470                 /* reschedule for later */
3471                 fan_watchdog_reset();
3472         }
3473 }
3474
3475 static void fan_watchdog_reset(void)
3476 {
3477         static int fan_watchdog_active = 0;
3478
3479         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3480                 return;
3481
3482         if (fan_watchdog_active)
3483                 cancel_delayed_work(&fan_watchdog_task);
3484
3485         if (fan_watchdog_maxinterval > 0) {
3486                 fan_watchdog_active = 1;
3487                 if (!schedule_delayed_work(&fan_watchdog_task,
3488                                 msecs_to_jiffies(fan_watchdog_maxinterval
3489                                                  * 1000))) {
3490                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3491                                "watchdog will not trigger\n");
3492                 }
3493         } else
3494                 fan_watchdog_active = 0;
3495 }
3496
3497 static int fan_set_level(int level)
3498 {
3499         if (!fan_control_allowed)
3500                 return -EPERM;
3501
3502         switch (fan_control_access_mode) {
3503         case TPACPI_FAN_WR_ACPI_SFAN:
3504                 if (level >= 0 && level <= 7) {
3505                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3506                                 return -EIO;
3507                 } else
3508                         return -EINVAL;
3509                 break;
3510
3511         case TPACPI_FAN_WR_ACPI_FANS:
3512         case TPACPI_FAN_WR_TPEC:
3513                 if ((level != TP_EC_FAN_AUTO) &&
3514                     (level != TP_EC_FAN_FULLSPEED) &&
3515                     ((level < 0) || (level > 7)))
3516                         return -EINVAL;
3517
3518                 /* safety net should the EC not support AUTO
3519                  * or FULLSPEED mode bits and just ignore them */
3520                 if (level & TP_EC_FAN_FULLSPEED)
3521                         level |= 7;     /* safety min speed 7 */
3522                 else if (level & TP_EC_FAN_FULLSPEED)
3523                         level |= 4;     /* safety min speed 4 */
3524
3525                 if (!acpi_ec_write(fan_status_offset, level))
3526                         return -EIO;
3527                 else
3528                         tp_features.fan_ctrl_status_undef = 0;
3529                 break;
3530
3531         default:
3532                 return -ENXIO;
3533         }
3534         return 0;
3535 }
3536
3537 static int fan_set_level_safe(int level)
3538 {
3539         int rc;
3540
3541         if (!fan_control_allowed)
3542                 return -EPERM;
3543
3544         rc = mutex_lock_interruptible(&fan_mutex);
3545         if (rc < 0)
3546                 return rc;
3547
3548         if (level == TPACPI_FAN_LAST_LEVEL)
3549                 level = fan_control_desired_level;
3550
3551         rc = fan_set_level(level);
3552         if (!rc)
3553                 fan_update_desired_level(level);
3554
3555         mutex_unlock(&fan_mutex);
3556         return rc;
3557 }
3558
3559 static int fan_set_enable(void)
3560 {
3561         u8 s;
3562         int rc;
3563
3564         if (!fan_control_allowed)
3565                 return -EPERM;
3566
3567         rc = mutex_lock_interruptible(&fan_mutex);
3568         if (rc < 0)
3569                 return rc;
3570
3571         switch (fan_control_access_mode) {
3572         case TPACPI_FAN_WR_ACPI_FANS:
3573         case TPACPI_FAN_WR_TPEC:
3574                 rc = fan_get_status(&s);
3575                 if (rc < 0)
3576                         break;
3577
3578                 /* Don't go out of emergency fan mode */
3579                 if (s != 7) {
3580                         s &= 0x07;
3581                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3582                 }
3583
3584                 if (!acpi_ec_write(fan_status_offset, s))
3585                         rc = -EIO;
3586                 else {
3587                         tp_features.fan_ctrl_status_undef = 0;
3588                         rc = 0;
3589                 }
3590                 break;
3591
3592         case TPACPI_FAN_WR_ACPI_SFAN:
3593                 rc = fan_get_status(&s);
3594                 if (rc < 0)
3595                         break;
3596
3597                 s &= 0x07;
3598
3599                 /* Set fan to at least level 4 */
3600                 s |= 4;
3601
3602                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3603                         rc= -EIO;
3604                 else
3605                         rc = 0;
3606                 break;
3607
3608         default:
3609                 rc = -ENXIO;
3610         }
3611
3612         mutex_unlock(&fan_mutex);
3613         return rc;
3614 }
3615
3616 static int fan_set_disable(void)
3617 {
3618         int rc;
3619
3620         if (!fan_control_allowed)
3621                 return -EPERM;
3622
3623         rc = mutex_lock_interruptible(&fan_mutex);
3624         if (rc < 0)
3625                 return rc;
3626
3627         rc = 0;
3628         switch (fan_control_access_mode) {
3629         case TPACPI_FAN_WR_ACPI_FANS:
3630         case TPACPI_FAN_WR_TPEC:
3631                 if (!acpi_ec_write(fan_status_offset, 0x00))
3632                         rc = -EIO;
3633                 else {
3634                         fan_control_desired_level = 0;
3635                         tp_features.fan_ctrl_status_undef = 0;
3636                 }
3637                 break;
3638
3639         case TPACPI_FAN_WR_ACPI_SFAN:
3640                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3641                         rc = -EIO;
3642                 else
3643                         fan_control_desired_level = 0;
3644                 break;
3645
3646         default:
3647                 rc = -ENXIO;
3648         }
3649
3650
3651         mutex_unlock(&fan_mutex);
3652         return rc;
3653 }
3654
3655 static int fan_set_speed(int speed)
3656 {
3657         int rc;
3658
3659         if (!fan_control_allowed)
3660                 return -EPERM;
3661
3662         rc = mutex_lock_interruptible(&fan_mutex);
3663         if (rc < 0)
3664                 return rc;
3665
3666         rc = 0;
3667         switch (fan_control_access_mode) {
3668         case TPACPI_FAN_WR_ACPI_FANS:
3669                 if (speed >= 0 && speed <= 65535) {
3670                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3671                                         speed, speed, speed))
3672                                 rc = -EIO;
3673                 } else
3674                         rc = -EINVAL;
3675                 break;
3676
3677         default:
3678                 rc = -ENXIO;
3679         }
3680
3681         mutex_unlock(&fan_mutex);
3682         return rc;
3683 }
3684
3685 static int fan_read(char *p)
3686 {
3687         int len = 0;
3688         int rc;
3689         u8 status;
3690         unsigned int speed = 0;
3691
3692         switch (fan_status_access_mode) {
3693         case TPACPI_FAN_RD_ACPI_GFAN:
3694                 /* 570, 600e/x, 770e, 770x */
3695                 if ((rc = fan_get_status_safe(&status)) < 0)
3696                         return rc;
3697
3698                 len += sprintf(p + len, "status:\t\t%s\n"
3699                                "level:\t\t%d\n",
3700                                (status != 0) ? "enabled" : "disabled", status);
3701                 break;
3702
3703         case TPACPI_FAN_RD_TPEC:
3704                 /* all except 570, 600e/x, 770e, 770x */
3705                 if ((rc = fan_get_status_safe(&status)) < 0)
3706                         return rc;
3707
3708                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3709                         if (status != fan_control_initial_status)
3710                                 tp_features.fan_ctrl_status_undef = 0;
3711                         else
3712                                 /* Return most likely status. In fact, it
3713                                  * might be the only possible status */
3714                                 status = TP_EC_FAN_AUTO;
3715                 }
3716
3717                 len += sprintf(p + len, "status:\t\t%s\n",
3718                                (status != 0) ? "enabled" : "disabled");
3719
3720                 if ((rc = fan_get_speed(&speed)) < 0)
3721                         return rc;
3722
3723                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3724
3725                 if (status & TP_EC_FAN_FULLSPEED)
3726                         /* Disengaged mode takes precedence */
3727                         len += sprintf(p + len, "level:\t\tdisengaged\n");
3728                 else if (status & TP_EC_FAN_AUTO)
3729                         len += sprintf(p + len, "level:\t\tauto\n");
3730                 else
3731                         len += sprintf(p + len, "level:\t\t%d\n", status);
3732                 break;
3733
3734         case TPACPI_FAN_NONE:
3735         default:
3736                 len += sprintf(p + len, "status:\t\tnot supported\n");
3737         }
3738
3739         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3740                 len += sprintf(p + len, "commands:\tlevel <level>");
3741
3742                 switch (fan_control_access_mode) {
3743                 case TPACPI_FAN_WR_ACPI_SFAN:
3744                         len += sprintf(p + len, " (<level> is 0-7)\n");
3745                         break;
3746
3747                 default:
3748                         len += sprintf(p + len, " (<level> is 0-7, "
3749                                        "auto, disengaged, full-speed)\n");
3750                         break;
3751                 }
3752         }
3753
3754         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3755                 len += sprintf(p + len, "commands:\tenable, disable\n"
3756                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3757                                "1-120 (seconds))\n");
3758
3759         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3760                 len += sprintf(p + len, "commands:\tspeed <speed>"
3761                                " (<speed> is 0-65535)\n");
3762
3763         return len;
3764 }
3765
3766 static int fan_write_cmd_level(const char *cmd, int *rc)
3767 {
3768         int level;
3769
3770         if (strlencmp(cmd, "level auto") == 0)
3771                 level = TP_EC_FAN_AUTO;
3772         else if ((strlencmp(cmd, "level disengaged") == 0) |
3773                  (strlencmp(cmd, "level full-speed") == 0))
3774                 level = TP_EC_FAN_FULLSPEED;
3775         else if (sscanf(cmd, "level %d", &level) != 1)
3776                 return 0;
3777
3778         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3779                 printk(IBM_ERR "level command accepted for unsupported "
3780                        "access mode %d", fan_control_access_mode);
3781
3782         return 1;
3783 }
3784
3785 static int fan_write_cmd_enable(const char *cmd, int *rc)
3786 {
3787         if (strlencmp(cmd, "enable") != 0)
3788                 return 0;
3789
3790         if ((*rc = fan_set_enable()) == -ENXIO)
3791                 printk(IBM_ERR "enable command accepted for unsupported "
3792                        "access mode %d", fan_control_access_mode);
3793
3794         return 1;
3795 }
3796
3797 static int fan_write_cmd_disable(const char *cmd, int *rc)
3798 {
3799         if (strlencmp(cmd, "disable") != 0)
3800                 return 0;
3801
3802         if ((*rc = fan_set_disable()) == -ENXIO)
3803                 printk(IBM_ERR "disable command accepted for unsupported "
3804                        "access mode %d", fan_control_access_mode);
3805
3806         return 1;
3807 }
3808
3809 static int fan_write_cmd_speed(const char *cmd, int *rc)
3810 {
3811         int speed;
3812
3813         /* TODO:
3814          * Support speed <low> <medium> <high> ? */
3815
3816         if (sscanf(cmd, "speed %d", &speed) != 1)
3817                 return 0;
3818
3819         if ((*rc = fan_set_speed(speed)) == -ENXIO)
3820                 printk(IBM_ERR "speed command accepted for unsupported "
3821                        "access mode %d", fan_control_access_mode);
3822
3823         return 1;
3824 }
3825
3826 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3827 {
3828         int interval;
3829
3830         if (sscanf(cmd, "watchdog %d", &interval) != 1)
3831                 return 0;
3832
3833         if (interval < 0 || interval > 120)
3834                 *rc = -EINVAL;
3835         else
3836                 fan_watchdog_maxinterval = interval;
3837
3838         return 1;
3839 }
3840
3841 static int fan_write(char *buf)
3842 {
3843         char *cmd;
3844         int rc = 0;
3845
3846         while (!rc && (cmd = next_cmd(&buf))) {
3847                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3848                       fan_write_cmd_level(cmd, &rc)) &&
3849                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3850                       (fan_write_cmd_enable(cmd, &rc) ||
3851                        fan_write_cmd_disable(cmd, &rc) ||
3852                        fan_write_cmd_watchdog(cmd, &rc))) &&
3853                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3854                       fan_write_cmd_speed(cmd, &rc))
3855                     )
3856                         rc = -EINVAL;
3857                 else if (!rc)
3858                         fan_watchdog_reset();
3859         }
3860
3861         return rc;
3862 }
3863
3864 static struct ibm_struct fan_driver_data = {
3865         .name = "fan",
3866         .read = fan_read,
3867         .write = fan_write,
3868         .exit = fan_exit,
3869 };
3870
3871 /****************************************************************************
3872  ****************************************************************************
3873  *
3874  * Infrastructure
3875  *
3876  ****************************************************************************
3877  ****************************************************************************/
3878
3879 /* /proc support */
3880 static struct proc_dir_entry *proc_dir = NULL;
3881
3882 /* Subdriver registry */
3883 static LIST_HEAD(tpacpi_all_drivers);
3884
3885
3886 /*
3887  * Module and infrastructure proble, init and exit handling
3888  */
3889
3890 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3891 static const char * __init str_supported(int is_supported)
3892 {
3893         static char text_unsupported[] __initdata = "not supported";
3894
3895         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3896 }
3897 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3898
3899 static int __init ibm_init(struct ibm_init_struct *iibm)
3900 {
3901         int ret;
3902         struct ibm_struct *ibm = iibm->data;
3903         struct proc_dir_entry *entry;
3904
3905         BUG_ON(ibm == NULL);
3906
3907         INIT_LIST_HEAD(&ibm->all_drivers);
3908
3909         if (ibm->flags.experimental && !experimental)
3910                 return 0;
3911
3912         dbg_printk(TPACPI_DBG_INIT,
3913                 "probing for %s\n", ibm->name);
3914
3915         if (iibm->init) {
3916                 ret = iibm->init(iibm);
3917                 if (ret > 0)
3918                         return 0;       /* probe failed */
3919                 if (ret)
3920                         return ret;
3921
3922                 ibm->flags.init_called = 1;
3923         }
3924
3925         if (ibm->acpi) {
3926                 if (ibm->acpi->hid) {
3927                         ret = register_tpacpi_subdriver(ibm);
3928                         if (ret)
3929                                 goto err_out;
3930                 }
3931
3932                 if (ibm->acpi->notify) {
3933                         ret = setup_acpi_notify(ibm);
3934                         if (ret == -ENODEV) {
3935                                 printk(IBM_NOTICE "disabling subdriver %s\n",
3936                                         ibm->name);
3937                                 ret = 0;
3938                                 goto err_out;
3939                         }
3940                         if (ret < 0)
3941                                 goto err_out;
3942                 }
3943         }
3944
3945         dbg_printk(TPACPI_DBG_INIT,
3946                 "%s installed\n", ibm->name);
3947
3948         if (ibm->read) {
3949                 entry = create_proc_entry(ibm->name,
3950                                           S_IFREG | S_IRUGO | S_IWUSR,
3951                                           proc_dir);
3952                 if (!entry) {
3953                         printk(IBM_ERR "unable to create proc entry %s\n",
3954                                ibm->name);
3955                         ret = -ENODEV;
3956                         goto err_out;
3957                 }
3958                 entry->owner = THIS_MODULE;
3959                 entry->data = ibm;
3960                 entry->read_proc = &dispatch_procfs_read;
3961                 if (ibm->write)
3962                         entry->write_proc = &dispatch_procfs_write;
3963                 ibm->flags.proc_created = 1;
3964         }
3965
3966         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
3967
3968         return 0;
3969
3970 err_out:
3971         dbg_printk(TPACPI_DBG_INIT,
3972                 "%s: at error exit path with result %d\n",
3973                 ibm->name, ret);
3974
3975         ibm_exit(ibm);
3976         return (ret < 0)? ret : 0;
3977 }
3978
3979 static void ibm_exit(struct ibm_struct *ibm)
3980 {
3981         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
3982
3983         list_del_init(&ibm->all_drivers);
3984
3985         if (ibm->flags.acpi_notify_installed) {
3986                 dbg_printk(TPACPI_DBG_EXIT,
3987                         "%s: acpi_remove_notify_handler\n", ibm->name);
3988                 BUG_ON(!ibm->acpi);
3989                 acpi_remove_notify_handler(*ibm->acpi->handle,
3990                                            ibm->acpi->type,
3991                                            dispatch_acpi_notify);
3992                 ibm->flags.acpi_notify_installed = 0;
3993                 ibm->flags.acpi_notify_installed = 0;
3994         }
3995
3996         if (ibm->flags.proc_created) {
3997                 dbg_printk(TPACPI_DBG_EXIT,
3998                         "%s: remove_proc_entry\n", ibm->name);
3999                 remove_proc_entry(ibm->name, proc_dir);
4000                 ibm->flags.proc_created = 0;
4001         }
4002
4003         if (ibm->flags.acpi_driver_registered) {
4004                 dbg_printk(TPACPI_DBG_EXIT,
4005                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4006                 BUG_ON(!ibm->acpi);
4007                 acpi_bus_unregister_driver(ibm->acpi->driver);
4008                 kfree(ibm->acpi->driver);
4009                 ibm->acpi->driver = NULL;
4010                 ibm->flags.acpi_driver_registered = 0;
4011         }
4012
4013         if (ibm->flags.init_called && ibm->exit) {
4014                 ibm->exit();
4015                 ibm->flags.init_called = 0;
4016         }
4017
4018         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4019 }
4020
4021 /* Probing */
4022
4023 static char *ibm_thinkpad_ec_found = NULL;
4024
4025 static char* __init check_dmi_for_ec(void)
4026 {
4027         struct dmi_device *dev = NULL;
4028         char ec_fw_string[18];
4029
4030         /*
4031          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4032          * X32 or newer, all Z series;  Some models must have an
4033          * up-to-date BIOS or they will not be detected.
4034          *
4035          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4036          */
4037         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4038                 if (sscanf(dev->name,
4039                            "IBM ThinkPad Embedded Controller -[%17c",
4040                            ec_fw_string) == 1) {
4041                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4042                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4043                         return kstrdup(ec_fw_string, GFP_KERNEL);
4044                 }
4045         }
4046         return NULL;
4047 }
4048
4049 static int __init probe_for_thinkpad(void)
4050 {
4051         int is_thinkpad;
4052
4053         if (acpi_disabled)
4054                 return -ENODEV;
4055
4056         /*
4057          * Non-ancient models have better DMI tagging, but very old models
4058          * don't.
4059          */
4060         is_thinkpad = dmi_name_in_vendors("ThinkPad");
4061
4062         /* ec is required because many other handles are relative to it */
4063         IBM_ACPIHANDLE_INIT(ec);
4064         if (!ec_handle) {
4065                 if (is_thinkpad)
4066                         printk(IBM_ERR
4067                                 "Not yet supported ThinkPad detected!\n");
4068                 return -ENODEV;
4069         }
4070
4071         /*
4072          * Risks a regression on very old machines, but reduces potential
4073          * false positives a damn great deal
4074          */
4075         if (!is_thinkpad)
4076                 is_thinkpad = dmi_name_in_vendors("IBM");
4077
4078         if (!is_thinkpad && !force_load)
4079                 return -ENODEV;
4080
4081         return 0;
4082 }
4083
4084
4085 /* Module init, exit, parameters */
4086
4087 static struct ibm_init_struct ibms_init[] __initdata = {
4088         {
4089                 .init = thinkpad_acpi_driver_init,
4090                 .data = &thinkpad_acpi_driver_data,
4091         },
4092         {
4093                 .init = hotkey_init,
4094                 .data = &hotkey_driver_data,
4095         },
4096         {
4097                 .init = bluetooth_init,
4098                 .data = &bluetooth_driver_data,
4099         },
4100         {
4101                 .init = wan_init,
4102                 .data = &wan_driver_data,
4103         },
4104         {
4105                 .init = video_init,
4106                 .data = &video_driver_data,
4107         },
4108         {
4109                 .init = light_init,
4110                 .data = &light_driver_data,
4111         },
4112 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4113         {
4114                 .init = dock_init,
4115                 .data = &dock_driver_data[0],
4116         },
4117         {
4118                 .init = dock_init2,
4119                 .data = &dock_driver_data[1],
4120         },
4121 #endif
4122 #ifdef CONFIG_THINKPAD_ACPI_BAY
4123         {
4124                 .init = bay_init,
4125                 .data = &bay_driver_data,
4126         },
4127 #endif
4128         {
4129                 .init = cmos_init,
4130                 .data = &cmos_driver_data,
4131         },
4132         {
4133                 .init = led_init,
4134                 .data = &led_driver_data,
4135         },
4136         {
4137                 .init = beep_init,
4138                 .data = &beep_driver_data,
4139         },
4140         {
4141                 .init = thermal_init,
4142                 .data = &thermal_driver_data,
4143         },
4144         {
4145                 .data = &ecdump_driver_data,
4146         },
4147         {
4148                 .init = brightness_init,
4149                 .data = &brightness_driver_data,
4150         },
4151         {
4152                 .data = &volume_driver_data,
4153         },
4154         {
4155                 .init = fan_init,
4156                 .data = &fan_driver_data,
4157         },
4158 };
4159
4160 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4161 {
4162         unsigned int i;
4163         struct ibm_struct *ibm;
4164
4165         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4166                 ibm = ibms_init[i].data;
4167                 BUG_ON(ibm == NULL);
4168
4169                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4170                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4171                                 return -ENOSPC;
4172                         strcpy(ibms_init[i].param, val);
4173                         strcat(ibms_init[i].param, ",");
4174                         return 0;
4175                 }
4176         }
4177
4178         return -EINVAL;
4179 }
4180
4181 static int experimental;
4182 module_param(experimental, int, 0);
4183
4184 static u32 dbg_level;
4185 module_param_named(debug, dbg_level, uint, 0);
4186
4187 static int force_load;
4188 module_param(force_load, int, 0);
4189
4190 static int fan_control_allowed;
4191 module_param_named(fan_control, fan_control_allowed, int, 0);
4192
4193 #define IBM_PARAM(feature) \
4194         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4195
4196 IBM_PARAM(hotkey);
4197 IBM_PARAM(bluetooth);
4198 IBM_PARAM(video);
4199 IBM_PARAM(light);
4200 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4201 IBM_PARAM(dock);
4202 #endif
4203 #ifdef CONFIG_THINKPAD_ACPI_BAY
4204 IBM_PARAM(bay);
4205 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4206 IBM_PARAM(cmos);
4207 IBM_PARAM(led);
4208 IBM_PARAM(beep);
4209 IBM_PARAM(ecdump);
4210 IBM_PARAM(brightness);
4211 IBM_PARAM(volume);
4212 IBM_PARAM(fan);
4213
4214 static int __init thinkpad_acpi_module_init(void)
4215 {
4216         int ret, i;
4217
4218         /* Driver-level probe */
4219         ret = probe_for_thinkpad();
4220         if (ret)
4221                 return ret;
4222
4223         /* Driver initialization */
4224         ibm_thinkpad_ec_found = check_dmi_for_ec();
4225         IBM_ACPIHANDLE_INIT(ecrd);
4226         IBM_ACPIHANDLE_INIT(ecwr);
4227
4228         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4229         if (!proc_dir) {
4230                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4231                 thinkpad_acpi_module_exit();
4232                 return -ENODEV;
4233         }
4234         proc_dir->owner = THIS_MODULE;
4235
4236         ret = platform_driver_register(&tpacpi_pdriver);
4237         if (ret) {
4238                 printk(IBM_ERR "unable to register platform driver\n");
4239                 thinkpad_acpi_module_exit();
4240                 return ret;
4241         }
4242         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4243         if (ret) {
4244                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4245                 thinkpad_acpi_module_exit();
4246                 return ret;
4247         }
4248
4249
4250         /* Device initialization */
4251         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4252                                                         NULL, 0);
4253         if (IS_ERR(tpacpi_pdev)) {
4254                 ret = PTR_ERR(tpacpi_pdev);
4255                 tpacpi_pdev = NULL;
4256                 printk(IBM_ERR "unable to register platform device\n");
4257                 thinkpad_acpi_module_exit();
4258                 return ret;
4259         }
4260         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4261         if (IS_ERR(tpacpi_hwmon)) {
4262                 ret = PTR_ERR(tpacpi_hwmon);
4263                 tpacpi_hwmon = NULL;
4264                 printk(IBM_ERR "unable to register hwmon device\n");
4265                 thinkpad_acpi_module_exit();
4266                 return ret;
4267         }
4268         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4269                 ret = ibm_init(&ibms_init[i]);
4270                 if (ret >= 0 && *ibms_init[i].param)
4271                         ret = ibms_init[i].data->write(ibms_init[i].param);
4272                 if (ret < 0) {
4273                         thinkpad_acpi_module_exit();
4274                         return ret;
4275                 }
4276         }
4277
4278         return 0;
4279 }
4280
4281 static void thinkpad_acpi_module_exit(void)
4282 {
4283         struct ibm_struct *ibm, *itmp;
4284
4285         list_for_each_entry_safe_reverse(ibm, itmp,
4286                                          &tpacpi_all_drivers,
4287                                          all_drivers) {
4288                 ibm_exit(ibm);
4289         }
4290
4291         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4292
4293         if (tpacpi_hwmon)
4294                 hwmon_device_unregister(tpacpi_hwmon);
4295
4296         if (tpacpi_pdev)
4297                 platform_device_unregister(tpacpi_pdev);
4298
4299         tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4300         platform_driver_unregister(&tpacpi_pdriver);
4301
4302         if (proc_dir)
4303                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4304
4305         kfree(ibm_thinkpad_ec_found);
4306 }
4307
4308 module_init(thinkpad_acpi_module_init);
4309 module_exit(thinkpad_acpi_module_exit);