drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.14"
  25 #define TPACPI_SYSFS_VERSION 0x000100
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 #include "thinkpad_acpi.h"
  86
  87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  88 MODULE_DESCRIPTION(IBM_DESC);
  89 MODULE_VERSION(IBM_VERSION);
  90 MODULE_LICENSE("GPL");
  91
  92 /* Please remove this in year 2009 */
  93 MODULE_ALIAS("ibm_acpi");
  94
  95 /*
  96  * DMI matching for module autoloading
  97  *
  98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
  99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 100  *
 101  * Only models listed in thinkwiki will be supported, so add yours
 102  * if it is not there yet.
 103  */
 104 #define IBM_BIOS_MODULE_ALIAS(__type) \
 105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 106
 107 /* Non-ancient thinkpads */
 108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 110
 111 /* Ancient thinkpad BIOSes have to be identified by
 112  * BIOS type or model number, and there are far less
 113  * BIOS types than model numbers... */
 114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 /****************************************************************************
 121  ****************************************************************************
 122  *
 123  * ACPI Helpers and device model
 124  *
 125  ****************************************************************************
 126  ****************************************************************************/
 127
 128 /*************************************************************************
 129  * ACPI basic handles
 130  */
 131
 132 static acpi_handle root_handle;
 133
 134 #define IBM_HANDLE(object, parent, paths...)                    \
 135         static acpi_handle  object##_handle;                    \
 136         static acpi_handle *object##_parent = &parent##_handle; \
 137         static char        *object##_path;                      \
 138         static char        *object##_paths[] = { paths }
 139
 140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 141            "\\_SB.PCI.ISA.EC",  /* 570 */
 142            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 143            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 144            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 145            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 146            "\\_SB.PCI0.LPC.EC", /* all others */
 147            );
 148
 149 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 150 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 151
 152
 153 /*************************************************************************
 154  * Misc ACPI handles
 155  */
 156
 157 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 158            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 159            "\\CMS",             /* R40, R40e */
 160            );                   /* all others */
 161
 162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 163            "^HKEY",             /* R30, R31 */
 164            "HKEY",              /* all others */
 165            );                   /* 570 */
 166
 167
 168 /*************************************************************************
 169  * ACPI helpers
 170  */
 171
 172 static int acpi_evalf(acpi_handle handle,
 173                       void *res, char *method, char *fmt, ...)
 174 {
 175         char *fmt0 = fmt;
 176         struct acpi_object_list params;
 177         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 178         struct acpi_buffer result, *resultp;
 179         union acpi_object out_obj;
 180         acpi_status status;
 181         va_list ap;
 182         char res_type;
 183         int success;
 184         int quiet;
 185
 186         if (!*fmt) {
 187                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 188                 return 0;
 189         }
 190
 191         if (*fmt == 'q') {
 192                 quiet = 1;
 193                 fmt++;
 194         } else
 195                 quiet = 0;
 196
 197         res_type = *(fmt++);
 198
 199         params.count = 0;
 200         params.pointer = &in_objs[0];
 201
 202         va_start(ap, fmt);
 203         while (*fmt) {
 204                 char c = *(fmt++);
 205                 switch (c) {
 206                 case 'd':       /* int */
 207                         in_objs[params.count].integer.value = va_arg(ap, int);
 208                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 209                         break;
 210                         /* add more types as needed */
 211                 default:
 212                         printk(IBM_ERR "acpi_evalf() called "
 213                                "with invalid format character '%c'\n", c);
 214                         return 0;
 215                 }
 216         }
 217         va_end(ap);
 218
 219         if (res_type != 'v') {
 220                 result.length = sizeof(out_obj);
 221                 result.pointer = &out_obj;
 222                 resultp = &result;
 223         } else
 224                 resultp = NULL;
 225
 226         status = acpi_evaluate_object(handle, method, &params, resultp);
 227
 228         switch (res_type) {
 229         case 'd':               /* int */
 230                 if (res)
 231                         *(int *)res = out_obj.integer.value;
 232                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 233                 break;
 234         case 'v':               /* void */
 235                 success = status == AE_OK;
 236                 break;
 237                 /* add more types as needed */
 238         default:
 239                 printk(IBM_ERR "acpi_evalf() called "
 240                        "with invalid format character '%c'\n", res_type);
 241                 return 0;
 242         }
 243
 244         if (!success && !quiet)
 245                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 246                        method, fmt0, status);
 247
 248         return success;
 249 }
 250
 251 static void __unused acpi_print_int(acpi_handle handle, char *method)
 252 {
 253         int i;
 254
 255         if (acpi_evalf(handle, &i, method, "d"))
 256                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 257         else
 258                 printk(IBM_ERR "error calling %s\n", method);
 259 }
 260
 261 static int acpi_ec_read(int i, u8 * p)
 262 {
 263         int v;
 264
 265         if (ecrd_handle) {
 266                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 267                         return 0;
 268                 *p = v;
 269         } else {
 270                 if (ec_read(i, p) < 0)
 271                         return 0;
 272         }
 273
 274         return 1;
 275 }
 276
 277 static int acpi_ec_write(int i, u8 v)
 278 {
 279         if (ecwr_handle) {
 280                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 281                         return 0;
 282         } else {
 283                 if (ec_write(i, v) < 0)
 284                         return 0;
 285         }
 286
 287         return 1;
 288 }
 289
 290 static int _sta(acpi_handle handle)
 291 {
 292         int status;
 293
 294         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 295                 status = 0;
 296
 297         return status;
 298 }
 299
 300 static int issue_thinkpad_cmos_command(int cmos_cmd)
 301 {
 302         if (!cmos_handle)
 303                 return -ENXIO;
 304
 305         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 306                 return -EIO;
 307
 308         return 0;
 309 }
 310
 311 /*************************************************************************
 312  * ACPI device model
 313  */
 314
 315 static void drv_acpi_handle_init(char *name,
 316                            acpi_handle *handle, acpi_handle parent,
 317                            char **paths, int num_paths, char **path)
 318 {
 319         int i;
 320         acpi_status status;
 321
 322         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 323                 name);
 324
 325         for (i = 0; i < num_paths; i++) {
 326                 status = acpi_get_handle(parent, paths[i], handle);
 327                 if (ACPI_SUCCESS(status)) {
 328                         *path = paths[i];
 329                         dbg_printk(TPACPI_DBG_INIT,
 330                                    "Found ACPI handle %s for %s\n",
 331                                    *path, name);
 332                         return;
 333                 }
 334         }
 335
 336         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 337                     name);
 338         *handle = NULL;
 339 }
 340
 341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 342 {
 343         struct ibm_struct *ibm = data;
 344
 345         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 346                 return;
 347
 348         ibm->acpi->notify(ibm, event);
 349 }
 350
 351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 352 {
 353         acpi_status status;
 354         int rc;
 355
 356         BUG_ON(!ibm->acpi);
 357
 358         if (!*ibm->acpi->handle)
 359                 return 0;
 360
 361         vdbg_printk(TPACPI_DBG_INIT,
 362                 "setting up ACPI notify for %s\n", ibm->name);
 363
 364         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 365         if (rc < 0) {
 366                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 367                         ibm->name, rc);
 368                 return -ENODEV;
 369         }
 370
 371         acpi_driver_data(ibm->acpi->device) = ibm;
 372         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 373                 IBM_ACPI_EVENT_PREFIX,
 374                 ibm->name);
 375
 376         status = acpi_install_notify_handler(*ibm->acpi->handle,
 377                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 378         if (ACPI_FAILURE(status)) {
 379                 if (status == AE_ALREADY_EXISTS) {
 380                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 381                                 ibm->name);
 382                 } else {
 383                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 384                                 ibm->name, status);
 385                 }
 386                 return -ENODEV;
 387         }
 388         ibm->flags.acpi_notify_installed = 1;
 389         return 0;
 390 }
 391
 392 static int __init tpacpi_device_add(struct acpi_device *device)
 393 {
 394         return 0;
 395 }
 396
 397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 398 {
 399         int rc;
 400
 401         dbg_printk(TPACPI_DBG_INIT,
 402                 "registering %s as an ACPI driver\n", ibm->name);
 403
 404         BUG_ON(!ibm->acpi);
 405
 406         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 407         if (!ibm->acpi->driver) {
 408                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 409                 return -ENOMEM;
 410         }
 411
 412         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 413         ibm->acpi->driver->ids = ibm->acpi->hid;
 414         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 415
 416         rc = acpi_bus_register_driver(ibm->acpi->driver);
 417         if (rc < 0) {
 418                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 419                        ibm->acpi->hid, rc);
 420                 kfree(ibm->acpi->driver);
 421                 ibm->acpi->driver = NULL;
 422         } else if (!rc)
 423                 ibm->flags.acpi_driver_registered = 1;
 424
 425         return rc;
 426 }
 427
 428
 429 /****************************************************************************
 430  ****************************************************************************
 431  *
 432  * Procfs Helpers
 433  *
 434  ****************************************************************************
 435  ****************************************************************************/
 436
 437 static int dispatch_procfs_read(char *page, char **start, off_t off,
 438                         int count, int *eof, void *data)
 439 {
 440         struct ibm_struct *ibm = data;
 441         int len;
 442
 443         if (!ibm || !ibm->read)
 444                 return -EINVAL;
 445
 446         len = ibm->read(page);
 447         if (len < 0)
 448                 return len;
 449
 450         if (len <= off + count)
 451                 *eof = 1;
 452         *start = page + off;
 453         len -= off;
 454         if (len > count)
 455                 len = count;
 456         if (len < 0)
 457                 len = 0;
 458
 459         return len;
 460 }
 461
 462 static int dispatch_procfs_write(struct file *file,
 463                         const char __user * userbuf,
 464                         unsigned long count, void *data)
 465 {
 466         struct ibm_struct *ibm = data;
 467         char *kernbuf;
 468         int ret;
 469
 470         if (!ibm || !ibm->write)
 471                 return -EINVAL;
 472
 473         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 474         if (!kernbuf)
 475                 return -ENOMEM;
 476
 477         if (copy_from_user(kernbuf, userbuf, count)) {
 478                 kfree(kernbuf);
 479                 return -EFAULT;
 480         }
 481
 482         kernbuf[count] = 0;
 483         strcat(kernbuf, ",");
 484         ret = ibm->write(kernbuf);
 485         if (ret == 0)
 486                 ret = count;
 487
 488         kfree(kernbuf);
 489
 490         return ret;
 491 }
 492
 493 static char *next_cmd(char **cmds)
 494 {
 495         char *start = *cmds;
 496         char *end;
 497
 498         while ((end = strchr(start, ',')) && end == start)
 499                 start = end + 1;
 500
 501         if (!end)
 502                 return NULL;
 503
 504         *end = 0;
 505         *cmds = end + 1;
 506         return start;
 507 }
 508
 509
 510 /****************************************************************************
 511  ****************************************************************************
 512  *
 513  * Device model: hwmon and platform
 514  *
 515  ****************************************************************************
 516  ****************************************************************************/
 517
 518 static struct platform_device *tpacpi_pdev;
 519 static struct class_device *tpacpi_hwmon;
 520
 521 static struct platform_driver tpacpi_pdriver = {
 522         .driver = {
 523                 .name = IBM_DRVR_NAME,
 524                 .owner = THIS_MODULE,
 525         },
 526 };
 527
 528
 529 /*************************************************************************
 530  * thinkpad-acpi driver attributes
 531  */
 532
 533 /* interface_version --------------------------------------------------- */
 534 static ssize_t tpacpi_driver_interface_version_show(
 535                                 struct device_driver *drv,
 536                                 char *buf)
 537 {
 538         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 539 }
 540
 541 static DRIVER_ATTR(interface_version, S_IRUGO,
 542                 tpacpi_driver_interface_version_show, NULL);
 543
 544 /* debug_level --------------------------------------------------------- */
 545 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 546                                                 char *buf)
 547 {
 548         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 549 }
 550
 551 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 552                                                 const char *buf, size_t count)
 553 {
 554         unsigned long t;
 555
 556         if (parse_strtoul(buf, 0xffff, &t))
 557                 return -EINVAL;
 558
 559         dbg_level = t;
 560
 561         return count;
 562 }
 563
 564 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 565                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 566
 567 /* version ------------------------------------------------------------- */
 568 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 569                                                 char *buf)
 570 {
 571         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 572 }
 573
 574 static DRIVER_ATTR(version, S_IRUGO,
 575                 tpacpi_driver_version_show, NULL);
 576
 577 /* --------------------------------------------------------------------- */
 578
 579 static struct driver_attribute* tpacpi_driver_attributes[] = {
 580         &driver_attr_debug_level, &driver_attr_version,
 581         &driver_attr_interface_version,
 582 };
 583
 584 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 585 {
 586         int i, res;
 587
 588         i = 0;
 589         res = 0;
 590         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 591                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 592                 i++;
 593         }
 594
 595         return res;
 596 }
 597
 598 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 599 {
 600         int i;
 601
 602         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 603                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 604 }
 605
 606 /*************************************************************************
 607  * sysfs support helpers
 608  */
 609
 610 struct attribute_set_obj {
 611         struct attribute_set s;
 612         struct attribute *a;
 613 } __attribute__((packed));
 614
 615 static struct attribute_set *create_attr_set(unsigned int max_members,
 616                                                 const char* name)
 617 {
 618         struct attribute_set_obj *sobj;
 619
 620         if (max_members == 0)
 621                 return NULL;
 622
 623         /* Allocates space for implicit NULL at the end too */
 624         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 625                     max_members * sizeof(struct attribute *),
 626                     GFP_KERNEL);
 627         if (!sobj)
 628                 return NULL;
 629         sobj->s.max_members = max_members;
 630         sobj->s.group.attrs = &sobj->a;
 631         sobj->s.group.name = name;
 632
 633         return &sobj->s;
 634 }
 635
 636 /* not multi-threaded safe, use it in a single thread per set */
 637 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 638 {
 639         if (!s || !attr)
 640                 return -EINVAL;
 641
 642         if (s->members >= s->max_members)
 643                 return -ENOMEM;
 644
 645         s->group.attrs[s->members] = attr;
 646         s->members++;
 647
 648         return 0;
 649 }
 650
 651 static int add_many_to_attr_set(struct attribute_set* s,
 652                         struct attribute **attr,
 653                         unsigned int count)
 654 {
 655         int i, res;
 656
 657         for (i = 0; i < count; i++) {
 658                 res = add_to_attr_set(s, attr[i]);
 659                 if (res)
 660                         return res;
 661         }
 662
 663         return 0;
 664 }
 665
 666 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 667 {
 668         sysfs_remove_group(kobj, &s->group);
 669         destroy_attr_set(s);
 670 }
 671
 672 static int parse_strtoul(const char *buf,
 673                 unsigned long max, unsigned long *value)
 674 {
 675         char *endp;
 676
 677         *value = simple_strtoul(buf, &endp, 0);
 678         while (*endp && isspace(*endp))
 679                 endp++;
 680         if (*endp || *value > max)
 681                 return -EINVAL;
 682
 683         return 0;
 684 }
 685
 686 /****************************************************************************
 687  ****************************************************************************
 688  *
 689  * Subdrivers
 690  *
 691  ****************************************************************************
 692  ****************************************************************************/
 693
 694 /*************************************************************************
 695  * thinkpad-acpi init subdriver
 696  */
 697
 698 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 699 {
 700         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 701         printk(IBM_INFO "%s\n", IBM_URL);
 702
 703         if (ibm_thinkpad_ec_found)
 704                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 705                        ibm_thinkpad_ec_found);
 706
 707         return 0;
 708 }
 709
 710 static int thinkpad_acpi_driver_read(char *p)
 711 {
 712         int len = 0;
 713
 714         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 715         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 716
 717         return len;
 718 }
 719
 720 static struct ibm_struct thinkpad_acpi_driver_data = {
 721         .name = "driver",
 722         .read = thinkpad_acpi_driver_read,
 723 };
 724
 725 /*************************************************************************
 726  * Hotkey subdriver
 727  */
 728
 729 static int hotkey_orig_status;
 730 static u32 hotkey_orig_mask;
 731 static u32 hotkey_all_mask;
 732 static u32 hotkey_reserved_mask = 0x00778000;
 733
 734 static struct attribute_set *hotkey_dev_attributes;
 735
 736 static int hotkey_get_wlsw(int *status)
 737 {
 738         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 739                 return -EIO;
 740         return 0;
 741 }
 742
 743 /* sysfs hotkey enable ------------------------------------------------- */
 744 static ssize_t hotkey_enable_show(struct device *dev,
 745                            struct device_attribute *attr,
 746                            char *buf)
 747 {
 748         int res, status;
 749         u32 mask;
 750
 751         res = hotkey_get(&status, &mask);
 752         if (res)
 753                 return res;
 754
 755         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 756 }
 757
 758 static ssize_t hotkey_enable_store(struct device *dev,
 759                             struct device_attribute *attr,
 760                             const char *buf, size_t count)
 761 {
 762         unsigned long t;
 763         int res, status;
 764         u32 mask;
 765
 766         if (parse_strtoul(buf, 1, &t))
 767                 return -EINVAL;
 768
 769         res = hotkey_get(&status, &mask);
 770         if (!res)
 771                 res = hotkey_set(t, mask);
 772
 773         return (res) ? res : count;
 774 }
 775
 776 static struct device_attribute dev_attr_hotkey_enable =
 777         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 778                 hotkey_enable_show, hotkey_enable_store);
 779
 780 /* sysfs hotkey mask --------------------------------------------------- */
 781 static ssize_t hotkey_mask_show(struct device *dev,
 782                            struct device_attribute *attr,
 783                            char *buf)
 784 {
 785         int res, status;
 786         u32 mask;
 787
 788         res = hotkey_get(&status, &mask);
 789         if (res)
 790                 return res;
 791
 792         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
 793 }
 794
 795 static ssize_t hotkey_mask_store(struct device *dev,
 796                             struct device_attribute *attr,
 797                             const char *buf, size_t count)
 798 {
 799         unsigned long t;
 800         int res, status;
 801         u32 mask;
 802
 803         if (parse_strtoul(buf, 0xffffffffUL, &t))
 804                 return -EINVAL;
 805
 806         res = hotkey_get(&status, &mask);
 807         if (!res)
 808                 hotkey_set(status, t);
 809
 810         return (res) ? res : count;
 811 }
 812
 813 static struct device_attribute dev_attr_hotkey_mask =
 814         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 815                 hotkey_mask_show, hotkey_mask_store);
 816
 817 /* sysfs hotkey bios_enabled ------------------------------------------- */
 818 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 819                            struct device_attribute *attr,
 820                            char *buf)
 821 {
 822         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 823 }
 824
 825 static struct device_attribute dev_attr_hotkey_bios_enabled =
 826         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 827
 828 /* sysfs hotkey bios_mask ---------------------------------------------- */
 829 static ssize_t hotkey_bios_mask_show(struct device *dev,
 830                            struct device_attribute *attr,
 831                            char *buf)
 832 {
 833         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 834 }
 835
 836 static struct device_attribute dev_attr_hotkey_bios_mask =
 837         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 838
 839 /* sysfs hotkey all_mask ----------------------------------------------- */
 840 static ssize_t hotkey_all_mask_show(struct device *dev,
 841                            struct device_attribute *attr,
 842                            char *buf)
 843 {
 844         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 845 }
 846
 847 static struct device_attribute dev_attr_hotkey_all_mask =
 848         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 849
 850 /* sysfs hotkey recommended_mask --------------------------------------- */
 851 static ssize_t hotkey_recommended_mask_show(struct device *dev,
 852                                             struct device_attribute *attr,
 853                                             char *buf)
 854 {
 855         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
 856                         hotkey_all_mask & ~hotkey_reserved_mask);
 857 }
 858
 859 static struct device_attribute dev_attr_hotkey_recommended_mask =
 860         __ATTR(hotkey_recommended_mask, S_IRUGO,
 861                 hotkey_recommended_mask_show, NULL);
 862
 863 /* sysfs hotkey radio_sw ----------------------------------------------- */
 864 static ssize_t hotkey_radio_sw_show(struct device *dev,
 865                            struct device_attribute *attr,
 866                            char *buf)
 867 {
 868         int res, s;
 869         res = hotkey_get_wlsw(&s);
 870         if (res < 0)
 871                 return res;
 872
 873         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
 874 }
 875
 876 static struct device_attribute dev_attr_hotkey_radio_sw =
 877         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
 878
 879 /* --------------------------------------------------------------------- */
 880
 881 static struct attribute *hotkey_mask_attributes[] = {
 882         &dev_attr_hotkey_mask.attr,
 883         &dev_attr_hotkey_bios_enabled.attr,
 884         &dev_attr_hotkey_bios_mask.attr,
 885         &dev_attr_hotkey_all_mask.attr,
 886         &dev_attr_hotkey_recommended_mask.attr,
 887 };
 888
 889 static int __init hotkey_init(struct ibm_init_struct *iibm)
 890 {
 891         int res;
 892         int status;
 893
 894         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 895
 896         IBM_ACPIHANDLE_INIT(hkey);
 897         mutex_init(&hotkey_mutex);
 898
 899         /* hotkey not supported on 570 */
 900         tp_features.hotkey = hkey_handle != NULL;
 901
 902         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 903                 str_supported(tp_features.hotkey));
 904
 905         if (tp_features.hotkey) {
 906                 hotkey_dev_attributes = create_attr_set(7, NULL);
 907                 if (!hotkey_dev_attributes)
 908                         return -ENOMEM;
 909                 res = add_to_attr_set(hotkey_dev_attributes,
 910                                 &dev_attr_hotkey_enable.attr);
 911                 if (res)
 912                         return res;
 913
 914                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 915                    A30, R30, R31, T20-22, X20-21, X22-24 */
 916                 tp_features.hotkey_mask =
 917                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 918
 919                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 920                         str_supported(tp_features.hotkey_mask));
 921
 922                 if (tp_features.hotkey_mask) {
 923                         /* MHKA available in A31, R40, R40e, T4x, X31, and later */
 924                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
 925                                         "MHKA", "qd"))
 926                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
 927                 }
 928
 929                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 930                 if (!res && tp_features.hotkey_mask) {
 931                         res = add_many_to_attr_set(hotkey_dev_attributes,
 932                                 hotkey_mask_attributes,
 933                                 ARRAY_SIZE(hotkey_mask_attributes));
 934                 }
 935
 936                 /* Not all thinkpads have a hardware radio switch */
 937                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
 938                         tp_features.hotkey_wlsw = 1;
 939                         printk(IBM_INFO
 940                                 "radio switch found; radios are %s\n",
 941                                 enabled(status, 0));
 942                         res = add_to_attr_set(hotkey_dev_attributes,
 943                                         &dev_attr_hotkey_radio_sw.attr);
 944                 }
 945
 946                 if (!res)
 947                         res = register_attr_set_with_sysfs(
 948                                         hotkey_dev_attributes,
 949                                         &tpacpi_pdev->dev.kobj);
 950                 if (res)
 951                         return res;
 952         }
 953
 954         return (tp_features.hotkey)? 0 : 1;
 955 }
 956
 957 static void hotkey_exit(void)
 958 {
 959         int res;
 960
 961         if (tp_features.hotkey) {
 962                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 963                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 964                 if (res)
 965                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 966         }
 967
 968         if (hotkey_dev_attributes) {
 969                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
 970                 hotkey_dev_attributes = NULL;
 971         }
 972 }
 973
 974 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 975 {
 976         int hkey;
 977
 978         if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
 979                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 980         } else {
 981                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
 982                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 983         }
 984 }
 985
 986 /*
 987  * Call with hotkey_mutex held
 988  */
 989 static int hotkey_get(int *status, u32 *mask)
 990 {
 991         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 992                 return -EIO;
 993
 994         if (tp_features.hotkey_mask)
 995                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 996                         return -EIO;
 997
 998         return 0;
 999 }
1000
1001 /*
1002  * Call with hotkey_mutex held
1003  */
1004 static int hotkey_set(int status, u32 mask)
1005 {
1006         int i;
1007
1008         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1009                 return -EIO;
1010
1011         if (tp_features.hotkey_mask)
1012                 for (i = 0; i < 32; i++) {
1013                         int bit = ((1 << i) & mask) != 0;
1014                         if (!acpi_evalf(hkey_handle,
1015                                         NULL, "MHKM", "vdd", i + 1, bit))
1016                                 return -EIO;
1017                 }
1018
1019         return 0;
1020 }
1021
1022 /* procfs -------------------------------------------------------------- */
1023 static int hotkey_read(char *p)
1024 {
1025         int res, status;
1026         u32 mask;
1027         int len = 0;
1028
1029         if (!tp_features.hotkey) {
1030                 len += sprintf(p + len, "status:\t\tnot supported\n");
1031                 return len;
1032         }
1033
1034         res = mutex_lock_interruptible(&hotkey_mutex);
1035         if (res < 0)
1036                 return res;
1037         res = hotkey_get(&status, &mask);
1038         mutex_unlock(&hotkey_mutex);
1039         if (res)
1040                 return res;
1041
1042         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1043         if (tp_features.hotkey_mask) {
1044                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1045                 len += sprintf(p + len,
1046                                "commands:\tenable, disable, reset, <mask>\n");
1047         } else {
1048                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1049                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1050         }
1051
1052         return len;
1053 }
1054
1055 static int hotkey_write(char *buf)
1056 {
1057         int res, status;
1058         u32 mask;
1059         char *cmd;
1060         int do_cmd = 0;
1061
1062         if (!tp_features.hotkey)
1063                 return -ENODEV;
1064
1065         res = mutex_lock_interruptible(&hotkey_mutex);
1066         if (res < 0)
1067                 return res;
1068
1069         res = hotkey_get(&status, &mask);
1070         if (res)
1071                 goto errexit;
1072
1073         res = 0;
1074         while ((cmd = next_cmd(&buf))) {
1075                 if (strlencmp(cmd, "enable") == 0) {
1076                         status = 1;
1077                 } else if (strlencmp(cmd, "disable") == 0) {
1078                         status = 0;
1079                 } else if (strlencmp(cmd, "reset") == 0) {
1080                         status = hotkey_orig_status;
1081                         mask = hotkey_orig_mask;
1082                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1083                         /* mask set */
1084                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1085                         /* mask set */
1086                 } else {
1087                         res = -EINVAL;
1088                         goto errexit;
1089                 }
1090                 do_cmd = 1;
1091         }
1092
1093         if (do_cmd)
1094                 res = hotkey_set(status, mask);
1095
1096 errexit:
1097         mutex_unlock(&hotkey_mutex);
1098         return res;
1099 }
1100
1101 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1102         .hid = IBM_HKEY_HID,
1103         .notify = hotkey_notify,
1104         .handle = &hkey_handle,
1105         .type = ACPI_DEVICE_NOTIFY,
1106 };
1107
1108 static struct ibm_struct hotkey_driver_data = {
1109         .name = "hotkey",
1110         .read = hotkey_read,
1111         .write = hotkey_write,
1112         .exit = hotkey_exit,
1113         .acpi = &ibm_hotkey_acpidriver,
1114 };
1115
1116 /*************************************************************************
1117  * Bluetooth subdriver
1118  */
1119
1120 /* sysfs bluetooth enable ---------------------------------------------- */
1121 static ssize_t bluetooth_enable_show(struct device *dev,
1122                            struct device_attribute *attr,
1123                            char *buf)
1124 {
1125         int status;
1126
1127         status = bluetooth_get_radiosw();
1128         if (status < 0)
1129                 return status;
1130
1131         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1132 }
1133
1134 static ssize_t bluetooth_enable_store(struct device *dev,
1135                             struct device_attribute *attr,
1136                             const char *buf, size_t count)
1137 {
1138         unsigned long t;
1139         int res;
1140
1141         if (parse_strtoul(buf, 1, &t))
1142                 return -EINVAL;
1143
1144         res = bluetooth_set_radiosw(t);
1145
1146         return (res) ? res : count;
1147 }
1148
1149 static struct device_attribute dev_attr_bluetooth_enable =
1150         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1151                 bluetooth_enable_show, bluetooth_enable_store);
1152
1153 /* --------------------------------------------------------------------- */
1154
1155 static struct attribute *bluetooth_attributes[] = {
1156         &dev_attr_bluetooth_enable.attr,
1157         NULL
1158 };
1159
1160 static const struct attribute_group bluetooth_attr_group = {
1161         .attrs = bluetooth_attributes,
1162 };
1163
1164 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1165 {
1166         int res;
1167         int status = 0;
1168
1169         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1170
1171         IBM_ACPIHANDLE_INIT(hkey);
1172
1173         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1174            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1175         tp_features.bluetooth = hkey_handle &&
1176             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1177
1178         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1179                 str_supported(tp_features.bluetooth),
1180                 status);
1181
1182         if (tp_features.bluetooth) {
1183                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1184                         /* no bluetooth hardware present in system */
1185                         tp_features.bluetooth = 0;
1186                         dbg_printk(TPACPI_DBG_INIT,
1187                                    "bluetooth hardware not installed\n");
1188                 } else {
1189                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1190                                         &bluetooth_attr_group);
1191                         if (res)
1192                                 return res;
1193                 }
1194         }
1195
1196         return (tp_features.bluetooth)? 0 : 1;
1197 }
1198
1199 static void bluetooth_exit(void)
1200 {
1201         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1202                         &bluetooth_attr_group);
1203 }
1204
1205 static int bluetooth_get_radiosw(void)
1206 {
1207         int status;
1208
1209         if (!tp_features.bluetooth)
1210                 return -ENODEV;
1211
1212         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1213                 return -EIO;
1214
1215         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1216 }
1217
1218 static int bluetooth_set_radiosw(int radio_on)
1219 {
1220         int status;
1221
1222         if (!tp_features.bluetooth)
1223                 return -ENODEV;
1224
1225         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1226                 return -EIO;
1227         if (radio_on)
1228                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1229         else
1230                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1231         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1232                 return -EIO;
1233
1234         return 0;
1235 }
1236
1237 /* procfs -------------------------------------------------------------- */
1238 static int bluetooth_read(char *p)
1239 {
1240         int len = 0;
1241         int status = bluetooth_get_radiosw();
1242
1243         if (!tp_features.bluetooth)
1244                 len += sprintf(p + len, "status:\t\tnot supported\n");
1245         else {
1246                 len += sprintf(p + len, "status:\t\t%s\n",
1247                                 (status)? "enabled" : "disabled");
1248                 len += sprintf(p + len, "commands:\tenable, disable\n");
1249         }
1250
1251         return len;
1252 }
1253
1254 static int bluetooth_write(char *buf)
1255 {
1256         char *cmd;
1257
1258         if (!tp_features.bluetooth)
1259                 return -ENODEV;
1260
1261         while ((cmd = next_cmd(&buf))) {
1262                 if (strlencmp(cmd, "enable") == 0) {
1263                         bluetooth_set_radiosw(1);
1264                 } else if (strlencmp(cmd, "disable") == 0) {
1265                         bluetooth_set_radiosw(0);
1266                 } else
1267                         return -EINVAL;
1268         }
1269
1270         return 0;
1271 }
1272
1273 static struct ibm_struct bluetooth_driver_data = {
1274         .name = "bluetooth",
1275         .read = bluetooth_read,
1276         .write = bluetooth_write,
1277         .exit = bluetooth_exit,
1278 };
1279
1280 /*************************************************************************
1281  * Wan subdriver
1282  */
1283
1284 /* sysfs wan enable ---------------------------------------------------- */
1285 static ssize_t wan_enable_show(struct device *dev,
1286                            struct device_attribute *attr,
1287                            char *buf)
1288 {
1289         int status;
1290
1291         status = wan_get_radiosw();
1292         if (status < 0)
1293                 return status;
1294
1295         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1296 }
1297
1298 static ssize_t wan_enable_store(struct device *dev,
1299                             struct device_attribute *attr,
1300                             const char *buf, size_t count)
1301 {
1302         unsigned long t;
1303         int res;
1304
1305         if (parse_strtoul(buf, 1, &t))
1306                 return -EINVAL;
1307
1308         res = wan_set_radiosw(t);
1309
1310         return (res) ? res : count;
1311 }
1312
1313 static struct device_attribute dev_attr_wan_enable =
1314         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1315                 wan_enable_show, wan_enable_store);
1316
1317 /* --------------------------------------------------------------------- */
1318
1319 static struct attribute *wan_attributes[] = {
1320         &dev_attr_wan_enable.attr,
1321         NULL
1322 };
1323
1324 static const struct attribute_group wan_attr_group = {
1325         .attrs = wan_attributes,
1326 };
1327
1328 static int __init wan_init(struct ibm_init_struct *iibm)
1329 {
1330         int res;
1331         int status = 0;
1332
1333         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1334
1335         IBM_ACPIHANDLE_INIT(hkey);
1336
1337         tp_features.wan = hkey_handle &&
1338             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1339
1340         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1341                 str_supported(tp_features.wan),
1342                 status);
1343
1344         if (tp_features.wan) {
1345                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1346                         /* no wan hardware present in system */
1347                         tp_features.wan = 0;
1348                         dbg_printk(TPACPI_DBG_INIT,
1349                                    "wan hardware not installed\n");
1350                 } else {
1351                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1352                                         &wan_attr_group);
1353                         if (res)
1354                                 return res;
1355                 }
1356         }
1357
1358         return (tp_features.wan)? 0 : 1;
1359 }
1360
1361 static void wan_exit(void)
1362 {
1363         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1364                 &wan_attr_group);
1365 }
1366
1367 static int wan_get_radiosw(void)
1368 {
1369         int status;
1370
1371         if (!tp_features.wan)
1372                 return -ENODEV;
1373
1374         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1375                 return -EIO;
1376
1377         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1378 }
1379
1380 static int wan_set_radiosw(int radio_on)
1381 {
1382         int status;
1383
1384         if (!tp_features.wan)
1385                 return -ENODEV;
1386
1387         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1388                 return -EIO;
1389         if (radio_on)
1390                 status |= TP_ACPI_WANCARD_RADIOSSW;
1391         else
1392                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1393         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1394                 return -EIO;
1395
1396         return 0;
1397 }
1398
1399 /* procfs -------------------------------------------------------------- */
1400 static int wan_read(char *p)
1401 {
1402         int len = 0;
1403         int status = wan_get_radiosw();
1404
1405         if (!tp_features.wan)
1406                 len += sprintf(p + len, "status:\t\tnot supported\n");
1407         else {
1408                 len += sprintf(p + len, "status:\t\t%s\n",
1409                                 (status)? "enabled" : "disabled");
1410                 len += sprintf(p + len, "commands:\tenable, disable\n");
1411         }
1412
1413         return len;
1414 }
1415
1416 static int wan_write(char *buf)
1417 {
1418         char *cmd;
1419
1420         if (!tp_features.wan)
1421                 return -ENODEV;
1422
1423         while ((cmd = next_cmd(&buf))) {
1424                 if (strlencmp(cmd, "enable") == 0) {
1425                         wan_set_radiosw(1);
1426                 } else if (strlencmp(cmd, "disable") == 0) {
1427                         wan_set_radiosw(0);
1428                 } else
1429                         return -EINVAL;
1430         }
1431
1432         return 0;
1433 }
1434
1435 static struct ibm_struct wan_driver_data = {
1436         .name = "wan",
1437         .read = wan_read,
1438         .write = wan_write,
1439         .exit = wan_exit,
1440         .flags.experimental = 1,
1441 };
1442
1443 /*************************************************************************
1444  * Video subdriver
1445  */
1446
1447 static enum video_access_mode video_supported;
1448 static int video_orig_autosw;
1449
1450 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1451            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1452            "\\_SB.PCI0.VID0",   /* 770e */
1453            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1454            "\\_SB.PCI0.AGP.VID",        /* all others */
1455            );                           /* R30, R31 */
1456
1457 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1458
1459 static int __init video_init(struct ibm_init_struct *iibm)
1460 {
1461         int ivga;
1462
1463         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1464
1465         IBM_ACPIHANDLE_INIT(vid);
1466         IBM_ACPIHANDLE_INIT(vid2);
1467
1468         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1469                 /* G41, assume IVGA doesn't change */
1470                 vid_handle = vid2_handle;
1471
1472         if (!vid_handle)
1473                 /* video switching not supported on R30, R31 */
1474                 video_supported = TPACPI_VIDEO_NONE;
1475         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1476                 /* 570 */
1477                 video_supported = TPACPI_VIDEO_570;
1478         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1479                 /* 600e/x, 770e, 770x */
1480                 video_supported = TPACPI_VIDEO_770;
1481         else
1482                 /* all others */
1483                 video_supported = TPACPI_VIDEO_NEW;
1484
1485         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1486                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1487                 video_supported);
1488
1489         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1490 }
1491
1492 static void video_exit(void)
1493 {
1494         dbg_printk(TPACPI_DBG_EXIT,
1495                    "restoring original video autoswitch mode\n");
1496         if (video_autosw_set(video_orig_autosw))
1497                 printk(IBM_ERR "error while trying to restore original "
1498                         "video autoswitch mode\n");
1499 }
1500
1501 static int video_outputsw_get(void)
1502 {
1503         int status = 0;
1504         int i;
1505
1506         switch (video_supported) {
1507         case TPACPI_VIDEO_570:
1508                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1509                                  TP_ACPI_VIDEO_570_PHSCMD))
1510                         return -EIO;
1511                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1512                 break;
1513         case TPACPI_VIDEO_770:
1514                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1515                         return -EIO;
1516                 if (i)
1517                         status |= TP_ACPI_VIDEO_S_LCD;
1518                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1519                         return -EIO;
1520                 if (i)
1521                         status |= TP_ACPI_VIDEO_S_CRT;
1522                 break;
1523         case TPACPI_VIDEO_NEW:
1524                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1525                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1526                         return -EIO;
1527                 if (i)
1528                         status |= TP_ACPI_VIDEO_S_CRT;
1529
1530                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1531                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1532                         return -EIO;
1533                 if (i)
1534                         status |= TP_ACPI_VIDEO_S_LCD;
1535                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1536                         return -EIO;
1537                 if (i)
1538                         status |= TP_ACPI_VIDEO_S_DVI;
1539                 break;
1540         default:
1541                 return -ENOSYS;
1542         }
1543
1544         return status;
1545 }
1546
1547 static int video_outputsw_set(int status)
1548 {
1549         int autosw;
1550         int res = 0;
1551
1552         switch (video_supported) {
1553         case TPACPI_VIDEO_570:
1554                 res = acpi_evalf(NULL, NULL,
1555                                  "\\_SB.PHS2", "vdd",
1556                                  TP_ACPI_VIDEO_570_PHS2CMD,
1557                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1558                 break;
1559         case TPACPI_VIDEO_770:
1560                 autosw = video_autosw_get();
1561                 if (autosw < 0)
1562                         return autosw;
1563
1564                 res = video_autosw_set(1);
1565                 if (res)
1566                         return res;
1567                 res = acpi_evalf(vid_handle, NULL,
1568                                  "ASWT", "vdd", status * 0x100, 0);
1569                 if (!autosw && video_autosw_set(autosw)) {
1570                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1571                         return -EIO;
1572                 }
1573                 break;
1574         case TPACPI_VIDEO_NEW:
1575                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1576                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1577                 break;
1578         default:
1579                 return -ENOSYS;
1580         }
1581
1582         return (res)? 0 : -EIO;
1583 }
1584
1585 static int video_autosw_get(void)
1586 {
1587         int autosw = 0;
1588
1589         switch (video_supported) {
1590         case TPACPI_VIDEO_570:
1591                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1592                         return -EIO;
1593                 break;
1594         case TPACPI_VIDEO_770:
1595         case TPACPI_VIDEO_NEW:
1596                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1597                         return -EIO;
1598                 break;
1599         default:
1600                 return -ENOSYS;
1601         }
1602
1603         return autosw & 1;
1604 }
1605
1606 static int video_autosw_set(int enable)
1607 {
1608         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1609                 return -EIO;
1610         return 0;
1611 }
1612
1613 static int video_outputsw_cycle(void)
1614 {
1615         int autosw = video_autosw_get();
1616         int res;
1617
1618         if (autosw < 0)
1619                 return autosw;
1620
1621         switch (video_supported) {
1622         case TPACPI_VIDEO_570:
1623                 res = video_autosw_set(1);
1624                 if (res)
1625                         return res;
1626                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1627                 break;
1628         case TPACPI_VIDEO_770:
1629         case TPACPI_VIDEO_NEW:
1630                 res = video_autosw_set(1);
1631                 if (res)
1632                         return res;
1633                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1634                 break;
1635         default:
1636                 return -ENOSYS;
1637         }
1638         if (!autosw && video_autosw_set(autosw)) {
1639                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1640                 return -EIO;
1641         }
1642
1643         return (res)? 0 : -EIO;
1644 }
1645
1646 static int video_expand_toggle(void)
1647 {
1648         switch (video_supported) {
1649         case TPACPI_VIDEO_570:
1650                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1651                         0 : -EIO;
1652         case TPACPI_VIDEO_770:
1653                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1654                         0 : -EIO;
1655         case TPACPI_VIDEO_NEW:
1656                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1657                         0 : -EIO;
1658         default:
1659                 return -ENOSYS;
1660         }
1661         /* not reached */
1662 }
1663
1664 static int video_read(char *p)
1665 {
1666         int status, autosw;
1667         int len = 0;
1668
1669         if (video_supported == TPACPI_VIDEO_NONE) {
1670                 len += sprintf(p + len, "status:\t\tnot supported\n");
1671                 return len;
1672         }
1673
1674         status = video_outputsw_get();
1675         if (status < 0)
1676                 return status;
1677
1678         autosw = video_autosw_get();
1679         if (autosw < 0)
1680                 return autosw;
1681
1682         len += sprintf(p + len, "status:\t\tsupported\n");
1683         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1684         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1685         if (video_supported == TPACPI_VIDEO_NEW)
1686                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1687         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1688         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1689         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1690         if (video_supported == TPACPI_VIDEO_NEW)
1691                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1692         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1693         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1694
1695         return len;
1696 }
1697
1698 static int video_write(char *buf)
1699 {
1700         char *cmd;
1701         int enable, disable, status;
1702         int res;
1703
1704         if (video_supported == TPACPI_VIDEO_NONE)
1705                 return -ENODEV;
1706
1707         enable = 0;
1708         disable = 0;
1709
1710         while ((cmd = next_cmd(&buf))) {
1711                 if (strlencmp(cmd, "lcd_enable") == 0) {
1712                         enable |= TP_ACPI_VIDEO_S_LCD;
1713                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1714                         disable |= TP_ACPI_VIDEO_S_LCD;
1715                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1716                         enable |= TP_ACPI_VIDEO_S_CRT;
1717                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1718                         disable |= TP_ACPI_VIDEO_S_CRT;
1719                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1720                            strlencmp(cmd, "dvi_enable") == 0) {
1721                         enable |= TP_ACPI_VIDEO_S_DVI;
1722                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1723                            strlencmp(cmd, "dvi_disable") == 0) {
1724                         disable |= TP_ACPI_VIDEO_S_DVI;
1725                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1726                         res = video_autosw_set(1);
1727                         if (res)
1728                                 return res;
1729                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1730                         res = video_autosw_set(0);
1731                         if (res)
1732                                 return res;
1733                 } else if (strlencmp(cmd, "video_switch") == 0) {
1734                         res = video_outputsw_cycle();
1735                         if (res)
1736                                 return res;
1737                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1738                         res = video_expand_toggle();
1739                         if (res)
1740                                 return res;
1741                 } else
1742                         return -EINVAL;
1743         }
1744
1745         if (enable || disable) {
1746                 status = video_outputsw_get();
1747                 if (status < 0)
1748                         return status;
1749                 res = video_outputsw_set((status & ~disable) | enable);
1750                 if (res)
1751                         return res;
1752         }
1753
1754         return 0;
1755 }
1756
1757 static struct ibm_struct video_driver_data = {
1758         .name = "video",
1759         .read = video_read,
1760         .write = video_write,
1761         .exit = video_exit,
1762 };
1763
1764 /*************************************************************************
1765  * Light (thinklight) subdriver
1766  */
1767
1768 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1769 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1770
1771 static int __init light_init(struct ibm_init_struct *iibm)
1772 {
1773         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1774
1775         IBM_ACPIHANDLE_INIT(ledb);
1776         IBM_ACPIHANDLE_INIT(lght);
1777         IBM_ACPIHANDLE_INIT(cmos);
1778
1779         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1780         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1781
1782         if (tp_features.light)
1783                 /* light status not supported on
1784                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1785                 tp_features.light_status =
1786                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1787
1788         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1789                 str_supported(tp_features.light));
1790
1791         return (tp_features.light)? 0 : 1;
1792 }
1793
1794 static int light_read(char *p)
1795 {
1796         int len = 0;
1797         int status = 0;
1798
1799         if (!tp_features.light) {
1800                 len += sprintf(p + len, "status:\t\tnot supported\n");
1801         } else if (!tp_features.light_status) {
1802                 len += sprintf(p + len, "status:\t\tunknown\n");
1803                 len += sprintf(p + len, "commands:\ton, off\n");
1804         } else {
1805                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1806                         return -EIO;
1807                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1808                 len += sprintf(p + len, "commands:\ton, off\n");
1809         }
1810
1811         return len;
1812 }
1813
1814 static int light_write(char *buf)
1815 {
1816         int cmos_cmd, lght_cmd;
1817         char *cmd;
1818         int success;
1819
1820         if (!tp_features.light)
1821                 return -ENODEV;
1822
1823         while ((cmd = next_cmd(&buf))) {
1824                 if (strlencmp(cmd, "on") == 0) {
1825                         cmos_cmd = 0x0c;
1826                         lght_cmd = 1;
1827                 } else if (strlencmp(cmd, "off") == 0) {
1828                         cmos_cmd = 0x0d;
1829                         lght_cmd = 0;
1830                 } else
1831                         return -EINVAL;
1832
1833                 success = cmos_handle ?
1834                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1835                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1836                 if (!success)
1837                         return -EIO;
1838         }
1839
1840         return 0;
1841 }
1842
1843 static struct ibm_struct light_driver_data = {
1844         .name = "light",
1845         .read = light_read,
1846         .write = light_write,
1847 };
1848
1849 /*************************************************************************
1850  * Dock subdriver
1851  */
1852
1853 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1854
1855 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1856            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1857            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1858            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1859     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1860
1861 /* don't list other alternatives as we install a notify handler on the 570 */
1862 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1863
1864 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1865         {
1866          .notify = dock_notify,
1867          .handle = &dock_handle,
1868          .type = ACPI_SYSTEM_NOTIFY,
1869         },
1870         {
1871          .hid = IBM_PCI_HID,
1872          .notify = dock_notify,
1873          .handle = &pci_handle,
1874          .type = ACPI_SYSTEM_NOTIFY,
1875         },
1876 };
1877
1878 static struct ibm_struct dock_driver_data[2] = {
1879         {
1880          .name = "dock",
1881          .read = dock_read,
1882          .write = dock_write,
1883          .acpi = &ibm_dock_acpidriver[0],
1884         },
1885         {
1886          .name = "dock",
1887          .acpi = &ibm_dock_acpidriver[1],
1888         },
1889 };
1890
1891 #define dock_docked() (_sta(dock_handle) & 1)
1892
1893 static int __init dock_init(struct ibm_init_struct *iibm)
1894 {
1895         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1896
1897         IBM_ACPIHANDLE_INIT(dock);
1898
1899         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1900                 str_supported(dock_handle != NULL));
1901
1902         return (dock_handle)? 0 : 1;
1903 }
1904
1905 static int __init dock_init2(struct ibm_init_struct *iibm)
1906 {
1907         int dock2_needed;
1908
1909         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1910
1911         if (dock_driver_data[0].flags.acpi_driver_registered &&
1912             dock_driver_data[0].flags.acpi_notify_installed) {
1913                 IBM_ACPIHANDLE_INIT(pci);
1914                 dock2_needed = (pci_handle != NULL);
1915                 vdbg_printk(TPACPI_DBG_INIT,
1916                             "dock PCI handler for the TP 570 is %s\n",
1917                             str_supported(dock2_needed));
1918         } else {
1919                 vdbg_printk(TPACPI_DBG_INIT,
1920                 "dock subdriver part 2 not required\n");
1921                 dock2_needed = 0;
1922         }
1923
1924         return (dock2_needed)? 0 : 1;
1925 }
1926
1927 static void dock_notify(struct ibm_struct *ibm, u32 event)
1928 {
1929         int docked = dock_docked();
1930         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1931
1932         if (event == 1 && !pci) /* 570 */
1933                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1934         else if (event == 1 && pci)     /* 570 */
1935                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1936         else if (event == 3 && docked)
1937                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1938         else if (event == 3 && !docked)
1939                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1940         else if (event == 0 && docked)
1941                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1942         else {
1943                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1944                        event, _sta(dock_handle));
1945                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1946         }
1947 }
1948
1949 static int dock_read(char *p)
1950 {
1951         int len = 0;
1952         int docked = dock_docked();
1953
1954         if (!dock_handle)
1955                 len += sprintf(p + len, "status:\t\tnot supported\n");
1956         else if (!docked)
1957                 len += sprintf(p + len, "status:\t\tundocked\n");
1958         else {
1959                 len += sprintf(p + len, "status:\t\tdocked\n");
1960                 len += sprintf(p + len, "commands:\tdock, undock\n");
1961         }
1962
1963         return len;
1964 }
1965
1966 static int dock_write(char *buf)
1967 {
1968         char *cmd;
1969
1970         if (!dock_docked())
1971                 return -ENODEV;
1972
1973         while ((cmd = next_cmd(&buf))) {
1974                 if (strlencmp(cmd, "undock") == 0) {
1975                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1976                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1977                                 return -EIO;
1978                 } else if (strlencmp(cmd, "dock") == 0) {
1979                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1980                                 return -EIO;
1981                 } else
1982                         return -EINVAL;
1983         }
1984
1985         return 0;
1986 }
1987
1988 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1989
1990 /*************************************************************************
1991  * Bay subdriver
1992  */
1993
1994 #ifdef CONFIG_THINKPAD_ACPI_BAY
1995 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1996            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1997            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1998            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
1999            );                           /* A21e, R30, R31 */
2000 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2001            "_EJ0",              /* all others */
2002            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2003 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2004            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2005            );                           /* all others */
2006 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2007            "_EJ0",                      /* 770x */
2008            );                           /* all others */
2009
2010 static int __init bay_init(struct ibm_init_struct *iibm)
2011 {
2012         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2013
2014         IBM_ACPIHANDLE_INIT(bay);
2015         if (bay_handle)
2016                 IBM_ACPIHANDLE_INIT(bay_ej);
2017         IBM_ACPIHANDLE_INIT(bay2);
2018         if (bay2_handle)
2019                 IBM_ACPIHANDLE_INIT(bay2_ej);
2020
2021         tp_features.bay_status = bay_handle &&
2022                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2023         tp_features.bay_status2 = bay2_handle &&
2024                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2025
2026         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2027                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2028         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2029                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2030
2031         vdbg_printk(TPACPI_DBG_INIT,
2032                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2033                 str_supported(tp_features.bay_status),
2034                 str_supported(tp_features.bay_eject),
2035                 str_supported(tp_features.bay_status2),
2036                 str_supported(tp_features.bay_eject2));
2037
2038         return (tp_features.bay_status || tp_features.bay_eject ||
2039                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2040 }
2041
2042 static void bay_notify(struct ibm_struct *ibm, u32 event)
2043 {
2044         acpi_bus_generate_event(ibm->acpi->device, event, 0);
2045 }
2046
2047 #define bay_occupied(b) (_sta(b##_handle) & 1)
2048
2049 static int bay_read(char *p)
2050 {
2051         int len = 0;
2052         int occupied = bay_occupied(bay);
2053         int occupied2 = bay_occupied(bay2);
2054         int eject, eject2;
2055
2056         len += sprintf(p + len, "status:\t\t%s\n",
2057                 tp_features.bay_status ?
2058                         (occupied ? "occupied" : "unoccupied") :
2059                                 "not supported");
2060         if (tp_features.bay_status2)
2061                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2062                                "occupied" : "unoccupied");
2063
2064         eject = tp_features.bay_eject && occupied;
2065         eject2 = tp_features.bay_eject2 && occupied2;
2066
2067         if (eject && eject2)
2068                 len += sprintf(p + len, "commands:\teject, eject2\n");
2069         else if (eject)
2070                 len += sprintf(p + len, "commands:\teject\n");
2071         else if (eject2)
2072                 len += sprintf(p + len, "commands:\teject2\n");
2073
2074         return len;
2075 }
2076
2077 static int bay_write(char *buf)
2078 {
2079         char *cmd;
2080
2081         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2082                 return -ENODEV;
2083
2084         while ((cmd = next_cmd(&buf))) {
2085                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2086                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2087                                 return -EIO;
2088                 } else if (tp_features.bay_eject2 &&
2089                            strlencmp(cmd, "eject2") == 0) {
2090                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2091                                 return -EIO;
2092                 } else
2093                         return -EINVAL;
2094         }
2095
2096         return 0;
2097 }
2098
2099 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2100         .notify = bay_notify,
2101         .handle = &bay_handle,
2102         .type = ACPI_SYSTEM_NOTIFY,
2103 };
2104
2105 static struct ibm_struct bay_driver_data = {
2106         .name = "bay",
2107         .read = bay_read,
2108         .write = bay_write,
2109         .acpi = &ibm_bay_acpidriver,
2110 };
2111
2112 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2113
2114 /*************************************************************************
2115  * CMOS subdriver
2116  */
2117
2118 /* sysfs cmos_command -------------------------------------------------- */
2119 static ssize_t cmos_command_store(struct device *dev,
2120                             struct device_attribute *attr,
2121                             const char *buf, size_t count)
2122 {
2123         unsigned long cmos_cmd;
2124         int res;
2125
2126         if (parse_strtoul(buf, 21, &cmos_cmd))
2127                 return -EINVAL;
2128
2129         res = issue_thinkpad_cmos_command(cmos_cmd);
2130         return (res)? res : count;
2131 }
2132
2133 static struct device_attribute dev_attr_cmos_command =
2134         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2135
2136 /* --------------------------------------------------------------------- */
2137
2138 static int __init cmos_init(struct ibm_init_struct *iibm)
2139 {
2140         int res;
2141
2142         vdbg_printk(TPACPI_DBG_INIT,
2143                 "initializing cmos commands subdriver\n");
2144
2145         IBM_ACPIHANDLE_INIT(cmos);
2146
2147         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2148                 str_supported(cmos_handle != NULL));
2149
2150         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2151         if (res)
2152                 return res;
2153
2154         return (cmos_handle)? 0 : 1;
2155 }
2156
2157 static void cmos_exit(void)
2158 {
2159         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2160 }
2161
2162 static int cmos_read(char *p)
2163 {
2164         int len = 0;
2165
2166         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2167            R30, R31, T20-22, X20-21 */
2168         if (!cmos_handle)
2169                 len += sprintf(p + len, "status:\t\tnot supported\n");
2170         else {
2171                 len += sprintf(p + len, "status:\t\tsupported\n");
2172                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2173         }
2174
2175         return len;
2176 }
2177
2178 static int cmos_write(char *buf)
2179 {
2180         char *cmd;
2181         int cmos_cmd, res;
2182
2183         while ((cmd = next_cmd(&buf))) {
2184                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2185                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2186                         /* cmos_cmd set */
2187                 } else
2188                         return -EINVAL;
2189
2190                 res = issue_thinkpad_cmos_command(cmos_cmd);
2191                 if (res)
2192                         return res;
2193         }
2194
2195         return 0;
2196 }
2197
2198 static struct ibm_struct cmos_driver_data = {
2199         .name = "cmos",
2200         .read = cmos_read,
2201         .write = cmos_write,
2202         .exit = cmos_exit,
2203 };
2204
2205 /*************************************************************************
2206  * LED subdriver
2207  */
2208
2209 static enum led_access_mode led_supported;
2210
2211 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2212            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2213            "LED",               /* all others */
2214            );                   /* R30, R31 */
2215
2216 static int __init led_init(struct ibm_init_struct *iibm)
2217 {
2218         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2219
2220         IBM_ACPIHANDLE_INIT(led);
2221
2222         if (!led_handle)
2223                 /* led not supported on R30, R31 */
2224                 led_supported = TPACPI_LED_NONE;
2225         else if (strlencmp(led_path, "SLED") == 0)
2226                 /* 570 */
2227                 led_supported = TPACPI_LED_570;
2228         else if (strlencmp(led_path, "SYSL") == 0)
2229                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2230                 led_supported = TPACPI_LED_OLD;
2231         else
2232                 /* all others */
2233                 led_supported = TPACPI_LED_NEW;
2234
2235         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2236                 str_supported(led_supported), led_supported);
2237
2238         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2239 }
2240
2241 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2242
2243 static int led_read(char *p)
2244 {
2245         int len = 0;
2246
2247         if (!led_supported) {
2248                 len += sprintf(p + len, "status:\t\tnot supported\n");
2249                 return len;
2250         }
2251         len += sprintf(p + len, "status:\t\tsupported\n");
2252
2253         if (led_supported == TPACPI_LED_570) {
2254                 /* 570 */
2255                 int i, status;
2256                 for (i = 0; i < 8; i++) {
2257                         if (!acpi_evalf(ec_handle,
2258                                         &status, "GLED", "dd", 1 << i))
2259                                 return -EIO;
2260                         len += sprintf(p + len, "%d:\t\t%s\n",
2261                                        i, led_status(status));
2262                 }
2263         }
2264
2265         len += sprintf(p + len, "commands:\t"
2266                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2267
2268         return len;
2269 }
2270
2271 /* off, on, blink */
2272 static const int led_sled_arg1[] = { 0, 1, 3 };
2273 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2274 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2275 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2276
2277 static int led_write(char *buf)
2278 {
2279         char *cmd;
2280         int led, ind, ret;
2281
2282         if (!led_supported)
2283                 return -ENODEV;
2284
2285         while ((cmd = next_cmd(&buf))) {
2286                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2287                         return -EINVAL;
2288
2289                 if (strstr(cmd, "off")) {
2290                         ind = 0;
2291                 } else if (strstr(cmd, "on")) {
2292                         ind = 1;
2293                 } else if (strstr(cmd, "blink")) {
2294                         ind = 2;
2295                 } else
2296                         return -EINVAL;
2297
2298                 if (led_supported == TPACPI_LED_570) {
2299                         /* 570 */
2300                         led = 1 << led;
2301                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2302                                         led, led_sled_arg1[ind]))
2303                                 return -EIO;
2304                 } else if (led_supported == TPACPI_LED_OLD) {
2305                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2306                         led = 1 << led;
2307                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2308                         if (ret >= 0)
2309                                 ret =
2310                                     ec_write(TPACPI_LED_EC_HLBL,
2311                                              led * led_exp_hlbl[ind]);
2312                         if (ret >= 0)
2313                                 ret =
2314                                     ec_write(TPACPI_LED_EC_HLCL,
2315                                              led * led_exp_hlcl[ind]);
2316                         if (ret < 0)
2317                                 return ret;
2318                 } else {
2319                         /* all others */
2320                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2321                                         led, led_led_arg1[ind]))
2322                                 return -EIO;
2323                 }
2324         }
2325
2326         return 0;
2327 }
2328
2329 static struct ibm_struct led_driver_data = {
2330         .name = "led",
2331         .read = led_read,
2332         .write = led_write,
2333 };
2334
2335 /*************************************************************************
2336  * Beep subdriver
2337  */
2338
2339 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2340
2341 static int __init beep_init(struct ibm_init_struct *iibm)
2342 {
2343         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2344
2345         IBM_ACPIHANDLE_INIT(beep);
2346
2347         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2348                 str_supported(beep_handle != NULL));
2349
2350         return (beep_handle)? 0 : 1;
2351 }
2352
2353 static int beep_read(char *p)
2354 {
2355         int len = 0;
2356
2357         if (!beep_handle)
2358                 len += sprintf(p + len, "status:\t\tnot supported\n");
2359         else {
2360                 len += sprintf(p + len, "status:\t\tsupported\n");
2361                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2362         }
2363
2364         return len;
2365 }
2366
2367 static int beep_write(char *buf)
2368 {
2369         char *cmd;
2370         int beep_cmd;
2371
2372         if (!beep_handle)
2373                 return -ENODEV;
2374
2375         while ((cmd = next_cmd(&buf))) {
2376                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2377                     beep_cmd >= 0 && beep_cmd <= 17) {
2378                         /* beep_cmd set */
2379                 } else
2380                         return -EINVAL;
2381                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2382                         return -EIO;
2383         }
2384
2385         return 0;
2386 }
2387
2388 static struct ibm_struct beep_driver_data = {
2389         .name = "beep",
2390         .read = beep_read,
2391         .write = beep_write,
2392 };
2393
2394 /*************************************************************************
2395  * Thermal subdriver
2396  */
2397
2398 static enum thermal_access_mode thermal_read_mode;
2399
2400 /* sysfs temp##_input -------------------------------------------------- */
2401
2402 static ssize_t thermal_temp_input_show(struct device *dev,
2403                            struct device_attribute *attr,
2404                            char *buf)
2405 {
2406         struct sensor_device_attribute *sensor_attr =
2407                                         to_sensor_dev_attr(attr);
2408         int idx = sensor_attr->index;
2409         s32 value;
2410         int res;
2411
2412         res = thermal_get_sensor(idx, &value);
2413         if (res)
2414                 return res;
2415         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2416                 return -ENXIO;
2417
2418         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2419 }
2420
2421 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2422          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2423
2424 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2425         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2426         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2427         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2428         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2429         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2430         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2431         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2432         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2433         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2434         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2435         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2436         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2437         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2438         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2439         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2440         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2441 };
2442
2443 #define THERMAL_ATTRS(X) \
2444         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2445
2446 static struct attribute *thermal_temp_input_attr[] = {
2447         THERMAL_ATTRS(8),
2448         THERMAL_ATTRS(9),
2449         THERMAL_ATTRS(10),
2450         THERMAL_ATTRS(11),
2451         THERMAL_ATTRS(12),
2452         THERMAL_ATTRS(13),
2453         THERMAL_ATTRS(14),
2454         THERMAL_ATTRS(15),
2455         THERMAL_ATTRS(0),
2456         THERMAL_ATTRS(1),
2457         THERMAL_ATTRS(2),
2458         THERMAL_ATTRS(3),
2459         THERMAL_ATTRS(4),
2460         THERMAL_ATTRS(5),
2461         THERMAL_ATTRS(6),
2462         THERMAL_ATTRS(7),
2463         NULL
2464 };
2465
2466 static const struct attribute_group thermal_temp_input16_group = {
2467         .attrs = thermal_temp_input_attr
2468 };
2469
2470 static const struct attribute_group thermal_temp_input8_group = {
2471         .attrs = &thermal_temp_input_attr[8]
2472 };
2473
2474 #undef THERMAL_SENSOR_ATTR_TEMP
2475 #undef THERMAL_ATTRS
2476
2477 /* --------------------------------------------------------------------- */
2478
2479 static int __init thermal_init(struct ibm_init_struct *iibm)
2480 {
2481         u8 t, ta1, ta2;
2482         int i;
2483         int acpi_tmp7;
2484         int res;
2485
2486         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2487
2488         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2489
2490         if (ibm_thinkpad_ec_found && experimental) {
2491                 /*
2492                  * Direct EC access mode: sensors at registers
2493                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2494                  * non-implemented, thermal sensors return 0x80 when
2495                  * not available
2496                  */
2497
2498                 ta1 = ta2 = 0;
2499                 for (i = 0; i < 8; i++) {
2500                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2501                                 ta1 |= t;
2502                         } else {
2503                                 ta1 = 0;
2504                                 break;
2505                         }
2506                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2507                                 ta2 |= t;
2508                         } else {
2509                                 ta1 = 0;
2510                                 break;
2511                         }
2512                 }
2513                 if (ta1 == 0) {
2514                         /* This is sheer paranoia, but we handle it anyway */
2515                         if (acpi_tmp7) {
2516                                 printk(IBM_ERR
2517                                        "ThinkPad ACPI EC access misbehaving, "
2518                                        "falling back to ACPI TMPx access mode\n");
2519                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2520                         } else {
2521                                 printk(IBM_ERR
2522                                        "ThinkPad ACPI EC access misbehaving, "
2523                                        "disabling thermal sensors access\n");
2524                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2525                         }
2526                 } else {
2527                         thermal_read_mode =
2528                             (ta2 != 0) ?
2529                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2530                 }
2531         } else if (acpi_tmp7) {
2532                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2533                         /* 600e/x, 770e, 770x */
2534                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2535                 } else {
2536                         /* Standard ACPI TMPx access, max 8 sensors */
2537                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2538                 }
2539         } else {
2540                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2541                 thermal_read_mode = TPACPI_THERMAL_NONE;
2542         }
2543
2544         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2545                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2546                 thermal_read_mode);
2547
2548         switch(thermal_read_mode) {
2549         case TPACPI_THERMAL_TPEC_16:
2550                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2551                                 &thermal_temp_input16_group);
2552                 if (res)
2553                         return res;
2554                 break;
2555         case TPACPI_THERMAL_TPEC_8:
2556         case TPACPI_THERMAL_ACPI_TMP07:
2557         case TPACPI_THERMAL_ACPI_UPDT:
2558                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2559                                 &thermal_temp_input8_group);
2560                 if (res)
2561                         return res;
2562                 break;
2563         case TPACPI_THERMAL_NONE:
2564         default:
2565                 return 1;
2566         }
2567
2568         return 0;
2569 }
2570
2571 static void thermal_exit(void)
2572 {
2573         switch(thermal_read_mode) {
2574         case TPACPI_THERMAL_TPEC_16:
2575                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2576                                    &thermal_temp_input16_group);
2577                 break;
2578         case TPACPI_THERMAL_TPEC_8:
2579         case TPACPI_THERMAL_ACPI_TMP07:
2580         case TPACPI_THERMAL_ACPI_UPDT:
2581                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2582                                    &thermal_temp_input16_group);
2583                 break;
2584         case TPACPI_THERMAL_NONE:
2585         default:
2586                 break;
2587         }
2588 }
2589
2590 /* idx is zero-based */
2591 static int thermal_get_sensor(int idx, s32 *value)
2592 {
2593         int t;
2594         s8 tmp;
2595         char tmpi[5];
2596
2597         t = TP_EC_THERMAL_TMP0;
2598
2599         switch (thermal_read_mode) {
2600 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2601         case TPACPI_THERMAL_TPEC_16:
2602                 if (idx >= 8 && idx <= 15) {
2603                         t = TP_EC_THERMAL_TMP8;
2604                         idx -= 8;
2605                 }
2606                 /* fallthrough */
2607 #endif
2608         case TPACPI_THERMAL_TPEC_8:
2609                 if (idx <= 7) {
2610                         if (!acpi_ec_read(t + idx, &tmp))
2611                                 return -EIO;
2612                         *value = tmp * 1000;
2613                         return 0;
2614                 }
2615                 break;
2616
2617         case TPACPI_THERMAL_ACPI_UPDT:
2618                 if (idx <= 7) {
2619                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2620                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2621                                 return -EIO;
2622                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2623                                 return -EIO;
2624                         *value = (t - 2732) * 100;
2625                         return 0;
2626                 }
2627                 break;
2628
2629         case TPACPI_THERMAL_ACPI_TMP07:
2630                 if (idx <= 7) {
2631                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2632                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2633                                 return -EIO;
2634                         *value = t * 1000;
2635                         return 0;
2636                 }
2637                 break;
2638
2639         case TPACPI_THERMAL_NONE:
2640         default:
2641                 return -ENOSYS;
2642         }
2643
2644         return -EINVAL;
2645 }
2646
2647 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2648 {
2649         int res, i;
2650         int n;
2651
2652         n = 8;
2653         i = 0;
2654
2655         if (!s)
2656                 return -EINVAL;
2657
2658         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2659                 n = 16;
2660
2661         for(i = 0 ; i < n; i++) {
2662                 res = thermal_get_sensor(i, &s->temp[i]);
2663                 if (res)
2664                         return res;
2665         }
2666
2667         return n;
2668 }
2669
2670 static int thermal_read(char *p)
2671 {
2672         int len = 0;
2673         int n, i;
2674         struct ibm_thermal_sensors_struct t;
2675
2676         n = thermal_get_sensors(&t);
2677         if (unlikely(n < 0))
2678                 return n;
2679
2680         len += sprintf(p + len, "temperatures:\t");
2681
2682         if (n > 0) {
2683                 for (i = 0; i < (n - 1); i++)
2684                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2685                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2686         } else
2687                 len += sprintf(p + len, "not supported\n");
2688
2689         return len;
2690 }
2691
2692 static struct ibm_struct thermal_driver_data = {
2693         .name = "thermal",
2694         .read = thermal_read,
2695         .exit = thermal_exit,
2696 };
2697
2698 /*************************************************************************
2699  * EC Dump subdriver
2700  */
2701
2702 static u8 ecdump_regs[256];
2703
2704 static int ecdump_read(char *p)
2705 {
2706         int len = 0;
2707         int i, j;
2708         u8 v;
2709
2710         len += sprintf(p + len, "EC      "
2711                        " +00 +01 +02 +03 +04 +05 +06 +07"
2712                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2713         for (i = 0; i < 256; i += 16) {
2714                 len += sprintf(p + len, "EC 0x%02x:", i);
2715                 for (j = 0; j < 16; j++) {
2716                         if (!acpi_ec_read(i + j, &v))
2717                                 break;
2718                         if (v != ecdump_regs[i + j])
2719                                 len += sprintf(p + len, " *%02x", v);
2720                         else
2721                                 len += sprintf(p + len, "  %02x", v);
2722                         ecdump_regs[i + j] = v;
2723                 }
2724                 len += sprintf(p + len, "\n");
2725                 if (j != 16)
2726                         break;
2727         }
2728
2729         /* These are way too dangerous to advertise openly... */
2730 #if 0
2731         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2732                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2733         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2734                        " (<offset> is 00-ff, <value> is 0-255)\n");
2735 #endif
2736         return len;
2737 }
2738
2739 static int ecdump_write(char *buf)
2740 {
2741         char *cmd;
2742         int i, v;
2743
2744         while ((cmd = next_cmd(&buf))) {
2745                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2746                         /* i and v set */
2747                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2748                         /* i and v set */
2749                 } else
2750                         return -EINVAL;
2751                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2752                         if (!acpi_ec_write(i, v))
2753                                 return -EIO;
2754                 } else
2755                         return -EINVAL;
2756         }
2757
2758         return 0;
2759 }
2760
2761 static struct ibm_struct ecdump_driver_data = {
2762         .name = "ecdump",
2763         .read = ecdump_read,
2764         .write = ecdump_write,
2765         .flags.experimental = 1,
2766 };
2767
2768 /*************************************************************************
2769  * Backlight/brightness subdriver
2770  */
2771
2772 static struct backlight_device *ibm_backlight_device;
2773
2774 static struct backlight_ops ibm_backlight_data = {
2775         .get_brightness = brightness_get,
2776         .update_status  = brightness_update_status,
2777 };
2778
2779 static int __init brightness_init(struct ibm_init_struct *iibm)
2780 {
2781         int b;
2782
2783         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2784
2785         b = brightness_get(NULL);
2786         if (b < 0)
2787                 return b;
2788
2789         ibm_backlight_device = backlight_device_register(
2790                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2791                                         &ibm_backlight_data);
2792         if (IS_ERR(ibm_backlight_device)) {
2793                 printk(IBM_ERR "Could not register backlight device\n");
2794                 return PTR_ERR(ibm_backlight_device);
2795         }
2796         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2797
2798         ibm_backlight_device->props.max_brightness = 7;
2799         ibm_backlight_device->props.brightness = b;
2800         backlight_update_status(ibm_backlight_device);
2801
2802         return 0;
2803 }
2804
2805 static void brightness_exit(void)
2806 {
2807         if (ibm_backlight_device) {
2808                 vdbg_printk(TPACPI_DBG_EXIT,
2809                             "calling backlight_device_unregister()\n");
2810                 backlight_device_unregister(ibm_backlight_device);
2811                 ibm_backlight_device = NULL;
2812         }
2813 }
2814
2815 static int brightness_update_status(struct backlight_device *bd)
2816 {
2817         return brightness_set(
2818                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2819                  bd->props.power == FB_BLANK_UNBLANK) ?
2820                                 bd->props.brightness : 0);
2821 }
2822
2823 static int brightness_get(struct backlight_device *bd)
2824 {
2825         u8 level;
2826         if (!acpi_ec_read(brightness_offset, &level))
2827                 return -EIO;
2828
2829         level &= 0x7;
2830
2831         return level;
2832 }
2833
2834 static int brightness_set(int value)
2835 {
2836         int cmos_cmd, inc, i;
2837         int current_value = brightness_get(NULL);
2838
2839         value &= 7;
2840
2841         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2842         inc = value > current_value ? 1 : -1;
2843         for (i = current_value; i != value; i += inc) {
2844                 if (issue_thinkpad_cmos_command(cmos_cmd))
2845                         return -EIO;
2846                 if (!acpi_ec_write(brightness_offset, i + inc))
2847                         return -EIO;
2848         }
2849
2850         return 0;
2851 }
2852
2853 static int brightness_read(char *p)
2854 {
2855         int len = 0;
2856         int level;
2857
2858         if ((level = brightness_get(NULL)) < 0) {
2859                 len += sprintf(p + len, "level:\t\tunreadable\n");
2860         } else {
2861                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2862                 len += sprintf(p + len, "commands:\tup, down\n");
2863                 len += sprintf(p + len, "commands:\tlevel <level>"
2864                                " (<level> is 0-7)\n");
2865         }
2866
2867         return len;
2868 }
2869
2870 static int brightness_write(char *buf)
2871 {
2872         int level;
2873         int new_level;
2874         char *cmd;
2875
2876         while ((cmd = next_cmd(&buf))) {
2877                 if ((level = brightness_get(NULL)) < 0)
2878                         return level;
2879                 level &= 7;
2880
2881                 if (strlencmp(cmd, "up") == 0) {
2882                         new_level = level == 7 ? 7 : level + 1;
2883                 } else if (strlencmp(cmd, "down") == 0) {
2884                         new_level = level == 0 ? 0 : level - 1;
2885                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2886                            new_level >= 0 && new_level <= 7) {
2887                         /* new_level set */
2888                 } else
2889                         return -EINVAL;
2890
2891                 brightness_set(new_level);
2892         }
2893
2894         return 0;
2895 }
2896
2897 static struct ibm_struct brightness_driver_data = {
2898         .name = "brightness",
2899         .read = brightness_read,
2900         .write = brightness_write,
2901         .exit = brightness_exit,
2902 };
2903
2904 /*************************************************************************
2905  * Volume subdriver
2906  */
2907
2908 static int volume_read(char *p)
2909 {
2910         int len = 0;
2911         u8 level;
2912
2913         if (!acpi_ec_read(volume_offset, &level)) {
2914                 len += sprintf(p + len, "level:\t\tunreadable\n");
2915         } else {
2916                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2917                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2918                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2919                 len += sprintf(p + len, "commands:\tlevel <level>"
2920                                " (<level> is 0-15)\n");
2921         }
2922
2923         return len;
2924 }
2925
2926 static int volume_write(char *buf)
2927 {
2928         int cmos_cmd, inc, i;
2929         u8 level, mute;
2930         int new_level, new_mute;
2931         char *cmd;
2932
2933         while ((cmd = next_cmd(&buf))) {
2934                 if (!acpi_ec_read(volume_offset, &level))
2935                         return -EIO;
2936                 new_mute = mute = level & 0x40;
2937                 new_level = level = level & 0xf;
2938
2939                 if (strlencmp(cmd, "up") == 0) {
2940                         if (mute)
2941                                 new_mute = 0;
2942                         else
2943                                 new_level = level == 15 ? 15 : level + 1;
2944                 } else if (strlencmp(cmd, "down") == 0) {
2945                         if (mute)
2946                                 new_mute = 0;
2947                         else
2948                                 new_level = level == 0 ? 0 : level - 1;
2949                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2950                            new_level >= 0 && new_level <= 15) {
2951                         /* new_level set */
2952                 } else if (strlencmp(cmd, "mute") == 0) {
2953                         new_mute = 0x40;
2954                 } else
2955                         return -EINVAL;
2956
2957                 if (new_level != level) {       /* mute doesn't change */
2958                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2959                         inc = new_level > level ? 1 : -1;
2960
2961                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2962                                      !acpi_ec_write(volume_offset, level)))
2963                                 return -EIO;
2964
2965                         for (i = level; i != new_level; i += inc)
2966                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2967                                     !acpi_ec_write(volume_offset, i + inc))
2968                                         return -EIO;
2969
2970                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2971                                      !acpi_ec_write(volume_offset,
2972                                                     new_level + mute)))
2973                                 return -EIO;
2974                 }
2975
2976                 if (new_mute != mute) { /* level doesn't change */
2977                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2978
2979                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
2980                             !acpi_ec_write(volume_offset, level + new_mute))
2981                                 return -EIO;
2982                 }
2983         }
2984
2985         return 0;
2986 }
2987
2988 static struct ibm_struct volume_driver_data = {
2989         .name = "volume",
2990         .read = volume_read,
2991         .write = volume_write,
2992 };
2993
2994 /*************************************************************************
2995  * Fan subdriver
2996  */
2997
2998 /*
2999  * FAN ACCESS MODES
3000  *
3001  * TPACPI_FAN_RD_ACPI_GFAN:
3002  *      ACPI GFAN method: returns fan level
3003  *
3004  *      see TPACPI_FAN_WR_ACPI_SFAN
3005  *      EC 0x2f (HFSP) not available if GFAN exists
3006  *
3007  * TPACPI_FAN_WR_ACPI_SFAN:
3008  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3009  *
3010  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3011  *      it for writing.
3012  *
3013  * TPACPI_FAN_WR_TPEC:
3014  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3015  *      Supported on almost all ThinkPads
3016  *
3017  *      Fan speed changes of any sort (including those caused by the
3018  *      disengaged mode) are usually done slowly by the firmware as the
3019  *      maximum ammount of fan duty cycle change per second seems to be
3020  *      limited.
3021  *
3022  *      Reading is not available if GFAN exists.
3023  *      Writing is not available if SFAN exists.
3024  *
3025  *      Bits
3026  *       7      automatic mode engaged;
3027  *              (default operation mode of the ThinkPad)
3028  *              fan level is ignored in this mode.
3029  *       6      full speed mode (takes precedence over bit 7);
3030  *              not available on all thinkpads.  May disable
3031  *              the tachometer while the fan controller ramps up
3032  *              the speed (which can take up to a few *minutes*).
3033  *              Speeds up fan to 100% duty-cycle, which is far above
3034  *              the standard RPM levels.  It is not impossible that
3035  *              it could cause hardware damage.
3036  *      5-3     unused in some models.  Extra bits for fan level
3037  *              in others, but still useless as all values above
3038  *              7 map to the same speed as level 7 in these models.
3039  *      2-0     fan level (0..7 usually)
3040  *                      0x00 = stop
3041  *                      0x07 = max (set when temperatures critical)
3042  *              Some ThinkPads may have other levels, see
3043  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3044  *
3045  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3046  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3047  *      does so, its initial value is meaningless (0x07).
3048  *
3049  *      For firmware bugs, refer to:
3050  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3051  *
3052  *      ----
3053  *
3054  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3055  *      Main fan tachometer reading (in RPM)
3056  *
3057  *      This register is present on all ThinkPads with a new-style EC, and
3058  *      it is known not to be present on the A21m/e, and T22, as there is
3059  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3060  *      ThinkPads from this same time period (and earlier) probably lack the
3061  *      tachometer as well.
3062  *
3063  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3064  *      was never fixed by IBM to report the EC firmware version string
3065  *      probably support the tachometer (like the early X models), so
3066  *      detecting it is quite hard.  We need more data to know for sure.
3067  *
3068  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3069  *      might result.
3070  *
3071  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3072  *      mode.
3073  *
3074  *      For firmware bugs, refer to:
3075  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3076  *
3077  * TPACPI_FAN_WR_ACPI_FANS:
3078  *      ThinkPad X31, X40, X41.  Not available in the X60.
3079  *
3080  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3081  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3082  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3083  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3084  *
3085  *      The speeds are stored on handles
3086  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3087  *
3088  *      There are three default speed sets, acessible as handles:
3089  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3090  *
3091  *      ACPI DSDT switches which set is in use depending on various
3092  *      factors.
3093  *
3094  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3095  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3096  *      but the ACPI tables just mention level 7.
3097  */
3098
3099 static enum fan_status_access_mode fan_status_access_mode;
3100 static enum fan_control_access_mode fan_control_access_mode;
3101 static enum fan_control_commands fan_control_commands;
3102
3103 static u8 fan_control_initial_status;
3104 static u8 fan_control_desired_level;
3105
3106 static void fan_watchdog_fire(struct work_struct *ignored);
3107 static int fan_watchdog_maxinterval;
3108 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3109
3110 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3111 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3112            "\\FSPD",            /* 600e/x, 770e, 770x */
3113            );                   /* all others */
3114 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3115            "JFNS",              /* 770x-JL */
3116            );                   /* all others */
3117
3118 /*
3119  * SYSFS fan layout: hwmon compatible (device)
3120  *
3121  * pwm*_enable:
3122  *      0: "disengaged" mode
3123  *      1: manual mode
3124  *      2: native EC "auto" mode (recommended, hardware default)
3125  *
3126  * pwm*: set speed in manual mode, ignored otherwise.
3127  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3128  *      interpolation.
3129  *
3130  * fan*_input: tachometer reading, RPM
3131  *
3132  *
3133  * SYSFS fan layout: extensions
3134  *
3135  * fan_watchdog (driver):
3136  *      fan watchdog interval in seconds, 0 disables (default), max 120
3137  */
3138
3139 /* sysfs fan pwm1_enable ----------------------------------------------- */
3140 static ssize_t fan_pwm1_enable_show(struct device *dev,
3141                                     struct device_attribute *attr,
3142                                     char *buf)
3143 {
3144         int res, mode;
3145         u8 status;
3146
3147         res = fan_get_status_safe(&status);
3148         if (res)
3149                 return res;
3150
3151         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3152                 if (status != fan_control_initial_status) {
3153                         tp_features.fan_ctrl_status_undef = 0;
3154                 } else {
3155                         /* Return most likely status. In fact, it
3156                          * might be the only possible status */
3157                         status = TP_EC_FAN_AUTO;
3158                 }
3159         }
3160
3161         if (status & TP_EC_FAN_FULLSPEED) {
3162                 mode = 0;
3163         } else if (status & TP_EC_FAN_AUTO) {
3164                 mode = 2;
3165         } else
3166                 mode = 1;
3167
3168         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3169 }
3170
3171 static ssize_t fan_pwm1_enable_store(struct device *dev,
3172                                      struct device_attribute *attr,
3173                                      const char *buf, size_t count)
3174 {
3175         unsigned long t;
3176         int res, level;
3177
3178         if (parse_strtoul(buf, 2, &t))
3179                 return -EINVAL;
3180
3181         switch (t) {
3182         case 0:
3183                 level = TP_EC_FAN_FULLSPEED;
3184                 break;
3185         case 1:
3186                 level = TPACPI_FAN_LAST_LEVEL;
3187                 break;
3188         case 2:
3189                 level = TP_EC_FAN_AUTO;
3190                 break;
3191         case 3:
3192                 /* reserved for software-controlled auto mode */
3193                 return -ENOSYS;
3194         default:
3195                 return -EINVAL;
3196         }
3197
3198         res = fan_set_level_safe(level);
3199         if (res == -ENXIO)
3200                 return -EINVAL;
3201         else if (res < 0)
3202                 return res;
3203
3204         fan_watchdog_reset();
3205
3206         return count;
3207 }
3208
3209 static struct device_attribute dev_attr_fan_pwm1_enable =
3210         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3211                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3212
3213 /* sysfs fan pwm1 ------------------------------------------------------ */
3214 static ssize_t fan_pwm1_show(struct device *dev,
3215                              struct device_attribute *attr,
3216                              char *buf)
3217 {
3218         int res;
3219         u8 status;
3220
3221         res = fan_get_status_safe(&status);
3222         if (res)
3223                 return res;
3224
3225         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3226                 if (status != fan_control_initial_status) {
3227                         tp_features.fan_ctrl_status_undef = 0;
3228                 } else {
3229                         status = TP_EC_FAN_AUTO;
3230                 }
3231         }
3232
3233         if ((status &
3234              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3235                 status = fan_control_desired_level;
3236
3237         if (status > 7)
3238                 status = 7;
3239
3240         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3241 }
3242
3243 static ssize_t fan_pwm1_store(struct device *dev,
3244                               struct device_attribute *attr,
3245                               const char *buf, size_t count)
3246 {
3247         unsigned long s;
3248         int rc;
3249         u8 status, newlevel;
3250
3251         if (parse_strtoul(buf, 255, &s))
3252                 return -EINVAL;
3253
3254         /* scale down from 0-255 to 0-7 */
3255         newlevel = (s >> 5) & 0x07;
3256
3257         rc = mutex_lock_interruptible(&fan_mutex);
3258         if (rc < 0)
3259                 return rc;
3260
3261         rc = fan_get_status(&status);
3262         if (!rc && (status &
3263                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3264                 rc = fan_set_level(newlevel);
3265                 if (rc == -ENXIO)
3266                         rc = -EINVAL;
3267                 else if (!rc) {
3268                         fan_update_desired_level(newlevel);
3269                         fan_watchdog_reset();
3270                 }
3271         }
3272
3273         mutex_unlock(&fan_mutex);
3274         return (rc)? rc : count;
3275 }
3276
3277 static struct device_attribute dev_attr_fan_pwm1 =
3278         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3279                 fan_pwm1_show, fan_pwm1_store);
3280
3281 /* sysfs fan fan1_input ------------------------------------------------ */
3282 static ssize_t fan_fan1_input_show(struct device *dev,
3283                            struct device_attribute *attr,
3284                            char *buf)
3285 {
3286         int res;
3287         unsigned int speed;
3288
3289         res = fan_get_speed(&speed);
3290         if (res < 0)
3291                 return res;
3292
3293         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3294 }
3295
3296 static struct device_attribute dev_attr_fan_fan1_input =
3297         __ATTR(fan1_input, S_IRUGO,
3298                 fan_fan1_input_show, NULL);
3299
3300 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3301 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3302                                      char *buf)
3303 {
3304         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3305 }
3306
3307 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3308                                       const char *buf, size_t count)
3309 {
3310         unsigned long t;
3311
3312         if (parse_strtoul(buf, 120, &t))
3313                 return -EINVAL;
3314
3315         if (!fan_control_allowed)
3316                 return -EPERM;
3317
3318         fan_watchdog_maxinterval = t;
3319         fan_watchdog_reset();
3320
3321         return count;
3322 }
3323
3324 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3325                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3326
3327 /* --------------------------------------------------------------------- */
3328 static struct attribute *fan_attributes[] = {
3329         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3330         &dev_attr_fan_fan1_input.attr,
3331         NULL
3332 };
3333
3334 static const struct attribute_group fan_attr_group = {
3335         .attrs = fan_attributes,
3336 };
3337
3338 static int __init fan_init(struct ibm_init_struct *iibm)
3339 {
3340         int rc;
3341
3342         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3343
3344         mutex_init(&fan_mutex);
3345         fan_status_access_mode = TPACPI_FAN_NONE;
3346         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3347         fan_control_commands = 0;
3348         fan_watchdog_maxinterval = 0;
3349         tp_features.fan_ctrl_status_undef = 0;
3350         fan_control_desired_level = 7;
3351
3352         IBM_ACPIHANDLE_INIT(fans);
3353         IBM_ACPIHANDLE_INIT(gfan);
3354         IBM_ACPIHANDLE_INIT(sfan);
3355
3356         if (gfan_handle) {
3357                 /* 570, 600e/x, 770e, 770x */
3358                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3359         } else {
3360                 /* all other ThinkPads: note that even old-style
3361                  * ThinkPad ECs supports the fan control register */
3362                 if (likely(acpi_ec_read(fan_status_offset,
3363                                         &fan_control_initial_status))) {
3364                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3365
3366                         /* In some ThinkPads, neither the EC nor the ACPI
3367                          * DSDT initialize the fan status, and it ends up
3368                          * being set to 0x07 when it *could* be either
3369                          * 0x07 or 0x80.
3370                          *
3371                          * Enable for TP-1Y (T43), TP-78 (R51e),
3372                          * TP-76 (R52), TP-70 (T43, R52), which are known
3373                          * to be buggy. */
3374                         if (fan_control_initial_status == 0x07 &&
3375                             ibm_thinkpad_ec_found &&
3376                             ((ibm_thinkpad_ec_found[0] == '1' &&
3377                               ibm_thinkpad_ec_found[1] == 'Y') ||
3378                              (ibm_thinkpad_ec_found[0] == '7' &&
3379                               (ibm_thinkpad_ec_found[1] == '6' ||
3380                                ibm_thinkpad_ec_found[1] == '8' ||
3381                                ibm_thinkpad_ec_found[1] == '0'))
3382                             )) {
3383                                 printk(IBM_NOTICE
3384                                        "fan_init: initial fan status is "
3385                                        "unknown, assuming it is in auto "
3386                                        "mode\n");
3387                                 tp_features.fan_ctrl_status_undef = 1;
3388                         }
3389                 } else {
3390                         printk(IBM_ERR
3391                                "ThinkPad ACPI EC access misbehaving, "
3392                                "fan status and control unavailable\n");
3393                         return 1;
3394                 }
3395         }
3396
3397         if (sfan_handle) {
3398                 /* 570, 770x-JL */
3399                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3400                 fan_control_commands |=
3401                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3402         } else {
3403                 if (!gfan_handle) {
3404                         /* gfan without sfan means no fan control */
3405                         /* all other models implement TP EC 0x2f control */
3406
3407                         if (fans_handle) {
3408                                 /* X31, X40, X41 */
3409                                 fan_control_access_mode =
3410                                     TPACPI_FAN_WR_ACPI_FANS;
3411                                 fan_control_commands |=
3412                                     TPACPI_FAN_CMD_SPEED |
3413                                     TPACPI_FAN_CMD_LEVEL |
3414                                     TPACPI_FAN_CMD_ENABLE;
3415                         } else {
3416                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3417                                 fan_control_commands |=
3418                                     TPACPI_FAN_CMD_LEVEL |
3419                                     TPACPI_FAN_CMD_ENABLE;
3420                         }
3421                 }
3422         }
3423
3424         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3425                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3426                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3427                 fan_status_access_mode, fan_control_access_mode);
3428
3429         /* fan control master switch */
3430         if (!fan_control_allowed) {
3431                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3432                 fan_control_commands = 0;
3433                 dbg_printk(TPACPI_DBG_INIT,
3434                            "fan control features disabled by parameter\n");
3435         }
3436
3437         /* update fan_control_desired_level */
3438         if (fan_status_access_mode != TPACPI_FAN_NONE)
3439                 fan_get_status_safe(NULL);
3440
3441         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3442             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3443                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3444                                          &fan_attr_group);
3445                 if (!(rc < 0))
3446                         rc = driver_create_file(&tpacpi_pdriver.driver,
3447                                         &driver_attr_fan_watchdog);
3448                 if (rc < 0)
3449                         return rc;
3450                 return 0;
3451         } else
3452                 return 1;
3453 }
3454
3455 /*
3456  * Call with fan_mutex held
3457  */
3458 static void fan_update_desired_level(u8 status)
3459 {
3460         if ((status &
3461              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3462                 if (status > 7)
3463                         fan_control_desired_level = 7;
3464                 else
3465                         fan_control_desired_level = status;
3466         }
3467 }
3468
3469 static int fan_get_status(u8 *status)
3470 {
3471         u8 s;
3472
3473         /* TODO:
3474          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3475
3476         switch (fan_status_access_mode) {
3477         case TPACPI_FAN_RD_ACPI_GFAN:
3478                 /* 570, 600e/x, 770e, 770x */
3479
3480                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3481                         return -EIO;
3482
3483                 if (likely(status))
3484                         *status = s & 0x07;
3485
3486                 break;
3487
3488         case TPACPI_FAN_RD_TPEC:
3489                 /* all except 570, 600e/x, 770e, 770x */
3490                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3491                         return -EIO;
3492
3493                 if (likely(status))
3494                         *status = s;
3495
3496                 break;
3497
3498         default:
3499                 return -ENXIO;
3500         }
3501
3502         return 0;
3503 }
3504
3505 static int fan_get_status_safe(u8 *status)
3506 {
3507         int rc;
3508         u8 s;
3509
3510         rc = mutex_lock_interruptible(&fan_mutex);
3511         if (rc < 0)
3512                 return rc;
3513         rc = fan_get_status(&s);
3514         if (!rc)
3515                 fan_update_desired_level(s);
3516         mutex_unlock(&fan_mutex);
3517
3518         if (status)
3519                 *status = s;
3520
3521         return rc;
3522 }
3523
3524 static void fan_exit(void)
3525 {
3526         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3527
3528         /* FIXME: can we really do this unconditionally? */
3529         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3530         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3531
3532         cancel_delayed_work(&fan_watchdog_task);
3533         flush_scheduled_work();
3534 }
3535
3536 static int fan_get_speed(unsigned int *speed)
3537 {
3538         u8 hi, lo;
3539
3540         switch (fan_status_access_mode) {
3541         case TPACPI_FAN_RD_TPEC:
3542                 /* all except 570, 600e/x, 770e, 770x */
3543                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3544                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3545                         return -EIO;
3546
3547                 if (likely(speed))
3548                         *speed = (hi << 8) | lo;
3549
3550                 break;
3551
3552         default:
3553                 return -ENXIO;
3554         }
3555
3556         return 0;
3557 }
3558
3559 static void fan_watchdog_fire(struct work_struct *ignored)
3560 {
3561         int rc;
3562
3563         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3564         rc = fan_set_enable();
3565         if (rc < 0) {
3566                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3567                         "will try again later...\n", -rc);
3568                 /* reschedule for later */
3569                 fan_watchdog_reset();
3570         }
3571 }
3572
3573 static void fan_watchdog_reset(void)
3574 {
3575         static int fan_watchdog_active;
3576
3577         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3578                 return;
3579
3580         if (fan_watchdog_active)
3581                 cancel_delayed_work(&fan_watchdog_task);
3582
3583         if (fan_watchdog_maxinterval > 0) {
3584                 fan_watchdog_active = 1;
3585                 if (!schedule_delayed_work(&fan_watchdog_task,
3586                                 msecs_to_jiffies(fan_watchdog_maxinterval
3587                                                  * 1000))) {
3588                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3589                                "watchdog will not trigger\n");
3590                 }
3591         } else
3592                 fan_watchdog_active = 0;
3593 }
3594
3595 static int fan_set_level(int level)
3596 {
3597         if (!fan_control_allowed)
3598                 return -EPERM;
3599
3600         switch (fan_control_access_mode) {
3601         case TPACPI_FAN_WR_ACPI_SFAN:
3602                 if (level >= 0 && level <= 7) {
3603                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3604                                 return -EIO;
3605                 } else
3606                         return -EINVAL;
3607                 break;
3608
3609         case TPACPI_FAN_WR_ACPI_FANS:
3610         case TPACPI_FAN_WR_TPEC:
3611                 if ((level != TP_EC_FAN_AUTO) &&
3612                     (level != TP_EC_FAN_FULLSPEED) &&
3613                     ((level < 0) || (level > 7)))
3614                         return -EINVAL;
3615
3616                 /* safety net should the EC not support AUTO
3617                  * or FULLSPEED mode bits and just ignore them */
3618                 if (level & TP_EC_FAN_FULLSPEED)
3619                         level |= 7;     /* safety min speed 7 */
3620                 else if (level & TP_EC_FAN_FULLSPEED)
3621                         level |= 4;     /* safety min speed 4 */
3622
3623                 if (!acpi_ec_write(fan_status_offset, level))
3624                         return -EIO;
3625                 else
3626                         tp_features.fan_ctrl_status_undef = 0;
3627                 break;
3628
3629         default:
3630                 return -ENXIO;
3631         }
3632         return 0;
3633 }
3634
3635 static int fan_set_level_safe(int level)
3636 {
3637         int rc;
3638
3639         if (!fan_control_allowed)
3640                 return -EPERM;
3641
3642         rc = mutex_lock_interruptible(&fan_mutex);
3643         if (rc < 0)
3644                 return rc;
3645
3646         if (level == TPACPI_FAN_LAST_LEVEL)
3647                 level = fan_control_desired_level;
3648
3649         rc = fan_set_level(level);
3650         if (!rc)
3651                 fan_update_desired_level(level);
3652
3653         mutex_unlock(&fan_mutex);
3654         return rc;
3655 }
3656
3657 static int fan_set_enable(void)
3658 {
3659         u8 s;
3660         int rc;
3661
3662         if (!fan_control_allowed)
3663                 return -EPERM;
3664
3665         rc = mutex_lock_interruptible(&fan_mutex);
3666         if (rc < 0)
3667                 return rc;
3668
3669         switch (fan_control_access_mode) {
3670         case TPACPI_FAN_WR_ACPI_FANS:
3671         case TPACPI_FAN_WR_TPEC:
3672                 rc = fan_get_status(&s);
3673                 if (rc < 0)
3674                         break;
3675
3676                 /* Don't go out of emergency fan mode */
3677                 if (s != 7) {
3678                         s &= 0x07;
3679                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3680                 }
3681
3682                 if (!acpi_ec_write(fan_status_offset, s))
3683                         rc = -EIO;
3684                 else {
3685                         tp_features.fan_ctrl_status_undef = 0;
3686                         rc = 0;
3687                 }
3688                 break;
3689
3690         case TPACPI_FAN_WR_ACPI_SFAN:
3691                 rc = fan_get_status(&s);
3692                 if (rc < 0)
3693                         break;
3694
3695                 s &= 0x07;
3696
3697                 /* Set fan to at least level 4 */
3698                 s |= 4;
3699
3700                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3701                         rc= -EIO;
3702                 else
3703                         rc = 0;
3704                 break;
3705
3706         default:
3707                 rc = -ENXIO;
3708         }
3709
3710         mutex_unlock(&fan_mutex);
3711         return rc;
3712 }
3713
3714 static int fan_set_disable(void)
3715 {
3716         int rc;
3717
3718         if (!fan_control_allowed)
3719                 return -EPERM;
3720
3721         rc = mutex_lock_interruptible(&fan_mutex);
3722         if (rc < 0)
3723                 return rc;
3724
3725         rc = 0;
3726         switch (fan_control_access_mode) {
3727         case TPACPI_FAN_WR_ACPI_FANS:
3728         case TPACPI_FAN_WR_TPEC:
3729                 if (!acpi_ec_write(fan_status_offset, 0x00))
3730                         rc = -EIO;
3731                 else {
3732                         fan_control_desired_level = 0;
3733                         tp_features.fan_ctrl_status_undef = 0;
3734                 }
3735                 break;
3736
3737         case TPACPI_FAN_WR_ACPI_SFAN:
3738                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3739                         rc = -EIO;
3740                 else
3741                         fan_control_desired_level = 0;
3742                 break;
3743
3744         default:
3745                 rc = -ENXIO;
3746         }
3747
3748
3749         mutex_unlock(&fan_mutex);
3750         return rc;
3751 }
3752
3753 static int fan_set_speed(int speed)
3754 {
3755         int rc;
3756
3757         if (!fan_control_allowed)
3758                 return -EPERM;
3759
3760         rc = mutex_lock_interruptible(&fan_mutex);
3761         if (rc < 0)
3762                 return rc;
3763
3764         rc = 0;
3765         switch (fan_control_access_mode) {
3766         case TPACPI_FAN_WR_ACPI_FANS:
3767                 if (speed >= 0 && speed <= 65535) {
3768                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3769                                         speed, speed, speed))
3770                                 rc = -EIO;
3771                 } else
3772                         rc = -EINVAL;
3773                 break;
3774
3775         default:
3776                 rc = -ENXIO;
3777         }
3778
3779         mutex_unlock(&fan_mutex);
3780         return rc;
3781 }
3782
3783 static int fan_read(char *p)
3784 {
3785         int len = 0;
3786         int rc;
3787         u8 status;
3788         unsigned int speed = 0;
3789
3790         switch (fan_status_access_mode) {
3791         case TPACPI_FAN_RD_ACPI_GFAN:
3792                 /* 570, 600e/x, 770e, 770x */
3793                 if ((rc = fan_get_status_safe(&status)) < 0)
3794                         return rc;
3795
3796                 len += sprintf(p + len, "status:\t\t%s\n"
3797                                "level:\t\t%d\n",
3798                                (status != 0) ? "enabled" : "disabled", status);
3799                 break;
3800
3801         case TPACPI_FAN_RD_TPEC:
3802                 /* all except 570, 600e/x, 770e, 770x */
3803                 if ((rc = fan_get_status_safe(&status)) < 0)
3804                         return rc;
3805
3806                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3807                         if (status != fan_control_initial_status)
3808                                 tp_features.fan_ctrl_status_undef = 0;
3809                         else
3810                                 /* Return most likely status. In fact, it
3811                                  * might be the only possible status */
3812                                 status = TP_EC_FAN_AUTO;
3813                 }
3814
3815                 len += sprintf(p + len, "status:\t\t%s\n",
3816                                (status != 0) ? "enabled" : "disabled");
3817
3818                 if ((rc = fan_get_speed(&speed)) < 0)
3819                         return rc;
3820
3821                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3822
3823                 if (status & TP_EC_FAN_FULLSPEED)
3824                         /* Disengaged mode takes precedence */
3825                         len += sprintf(p + len, "level:\t\tdisengaged\n");
3826                 else if (status & TP_EC_FAN_AUTO)
3827                         len += sprintf(p + len, "level:\t\tauto\n");
3828                 else
3829                         len += sprintf(p + len, "level:\t\t%d\n", status);
3830                 break;
3831
3832         case TPACPI_FAN_NONE:
3833         default:
3834                 len += sprintf(p + len, "status:\t\tnot supported\n");
3835         }
3836
3837         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3838                 len += sprintf(p + len, "commands:\tlevel <level>");
3839
3840                 switch (fan_control_access_mode) {
3841                 case TPACPI_FAN_WR_ACPI_SFAN:
3842                         len += sprintf(p + len, " (<level> is 0-7)\n");
3843                         break;
3844
3845                 default:
3846                         len += sprintf(p + len, " (<level> is 0-7, "
3847                                        "auto, disengaged, full-speed)\n");
3848                         break;
3849                 }
3850         }
3851
3852         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3853                 len += sprintf(p + len, "commands:\tenable, disable\n"
3854                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3855                                "1-120 (seconds))\n");
3856
3857         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3858                 len += sprintf(p + len, "commands:\tspeed <speed>"
3859                                " (<speed> is 0-65535)\n");
3860
3861         return len;
3862 }
3863
3864 static int fan_write_cmd_level(const char *cmd, int *rc)
3865 {
3866         int level;
3867
3868         if (strlencmp(cmd, "level auto") == 0)
3869                 level = TP_EC_FAN_AUTO;
3870         else if ((strlencmp(cmd, "level disengaged") == 0) |
3871                  (strlencmp(cmd, "level full-speed") == 0))
3872                 level = TP_EC_FAN_FULLSPEED;
3873         else if (sscanf(cmd, "level %d", &level) != 1)
3874                 return 0;
3875
3876         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3877                 printk(IBM_ERR "level command accepted for unsupported "
3878                        "access mode %d", fan_control_access_mode);
3879
3880         return 1;
3881 }
3882
3883 static int fan_write_cmd_enable(const char *cmd, int *rc)
3884 {
3885         if (strlencmp(cmd, "enable") != 0)
3886                 return 0;
3887
3888         if ((*rc = fan_set_enable()) == -ENXIO)
3889                 printk(IBM_ERR "enable command accepted for unsupported "
3890                        "access mode %d", fan_control_access_mode);
3891
3892         return 1;
3893 }
3894
3895 static int fan_write_cmd_disable(const char *cmd, int *rc)
3896 {
3897         if (strlencmp(cmd, "disable") != 0)
3898                 return 0;
3899
3900         if ((*rc = fan_set_disable()) == -ENXIO)
3901                 printk(IBM_ERR "disable command accepted for unsupported "
3902                        "access mode %d", fan_control_access_mode);
3903
3904         return 1;
3905 }
3906
3907 static int fan_write_cmd_speed(const char *cmd, int *rc)
3908 {
3909         int speed;
3910
3911         /* TODO:
3912          * Support speed <low> <medium> <high> ? */
3913
3914         if (sscanf(cmd, "speed %d", &speed) != 1)
3915                 return 0;
3916
3917         if ((*rc = fan_set_speed(speed)) == -ENXIO)
3918                 printk(IBM_ERR "speed command accepted for unsupported "
3919                        "access mode %d", fan_control_access_mode);
3920
3921         return 1;
3922 }
3923
3924 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3925 {
3926         int interval;
3927
3928         if (sscanf(cmd, "watchdog %d", &interval) != 1)
3929                 return 0;
3930
3931         if (interval < 0 || interval > 120)
3932                 *rc = -EINVAL;
3933         else
3934                 fan_watchdog_maxinterval = interval;
3935
3936         return 1;
3937 }
3938
3939 static int fan_write(char *buf)
3940 {
3941         char *cmd;
3942         int rc = 0;
3943
3944         while (!rc && (cmd = next_cmd(&buf))) {
3945                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3946                       fan_write_cmd_level(cmd, &rc)) &&
3947                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3948                       (fan_write_cmd_enable(cmd, &rc) ||
3949                        fan_write_cmd_disable(cmd, &rc) ||
3950                        fan_write_cmd_watchdog(cmd, &rc))) &&
3951                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3952                       fan_write_cmd_speed(cmd, &rc))
3953                     )
3954                         rc = -EINVAL;
3955                 else if (!rc)
3956                         fan_watchdog_reset();
3957         }
3958
3959         return rc;
3960 }
3961
3962 static struct ibm_struct fan_driver_data = {
3963         .name = "fan",
3964         .read = fan_read,
3965         .write = fan_write,
3966         .exit = fan_exit,
3967 };
3968
3969 /****************************************************************************
3970  ****************************************************************************
3971  *
3972  * Infrastructure
3973  *
3974  ****************************************************************************
3975  ****************************************************************************/
3976
3977 /* /proc support */
3978 static struct proc_dir_entry *proc_dir;
3979
3980 /* Subdriver registry */
3981 static LIST_HEAD(tpacpi_all_drivers);
3982
3983
3984 /*
3985  * Module and infrastructure proble, init and exit handling
3986  */
3987
3988 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3989 static const char * __init str_supported(int is_supported)
3990 {
3991         static char text_unsupported[] __initdata = "not supported";
3992
3993         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3994 }
3995 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3996
3997 static int __init ibm_init(struct ibm_init_struct *iibm)
3998 {
3999         int ret;
4000         struct ibm_struct *ibm = iibm->data;
4001         struct proc_dir_entry *entry;
4002
4003         BUG_ON(ibm == NULL);
4004
4005         INIT_LIST_HEAD(&ibm->all_drivers);
4006
4007         if (ibm->flags.experimental && !experimental)
4008                 return 0;
4009
4010         dbg_printk(TPACPI_DBG_INIT,
4011                 "probing for %s\n", ibm->name);
4012
4013         if (iibm->init) {
4014                 ret = iibm->init(iibm);
4015                 if (ret > 0)
4016                         return 0;       /* probe failed */
4017                 if (ret)
4018                         return ret;
4019
4020                 ibm->flags.init_called = 1;
4021         }
4022
4023         if (ibm->acpi) {
4024                 if (ibm->acpi->hid) {
4025                         ret = register_tpacpi_subdriver(ibm);
4026                         if (ret)
4027                                 goto err_out;
4028                 }
4029
4030                 if (ibm->acpi->notify) {
4031                         ret = setup_acpi_notify(ibm);
4032                         if (ret == -ENODEV) {
4033                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4034                                         ibm->name);
4035                                 ret = 0;
4036                                 goto err_out;
4037                         }
4038                         if (ret < 0)
4039                                 goto err_out;
4040                 }
4041         }
4042
4043         dbg_printk(TPACPI_DBG_INIT,
4044                 "%s installed\n", ibm->name);
4045
4046         if (ibm->read) {
4047                 entry = create_proc_entry(ibm->name,
4048                                           S_IFREG | S_IRUGO | S_IWUSR,
4049                                           proc_dir);
4050                 if (!entry) {
4051                         printk(IBM_ERR "unable to create proc entry %s\n",
4052                                ibm->name);
4053                         ret = -ENODEV;
4054                         goto err_out;
4055                 }
4056                 entry->owner = THIS_MODULE;
4057                 entry->data = ibm;
4058                 entry->read_proc = &dispatch_procfs_read;
4059                 if (ibm->write)
4060                         entry->write_proc = &dispatch_procfs_write;
4061                 ibm->flags.proc_created = 1;
4062         }
4063
4064         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4065
4066         return 0;
4067
4068 err_out:
4069         dbg_printk(TPACPI_DBG_INIT,
4070                 "%s: at error exit path with result %d\n",
4071                 ibm->name, ret);
4072
4073         ibm_exit(ibm);
4074         return (ret < 0)? ret : 0;
4075 }
4076
4077 static void ibm_exit(struct ibm_struct *ibm)
4078 {
4079         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4080
4081         list_del_init(&ibm->all_drivers);
4082
4083         if (ibm->flags.acpi_notify_installed) {
4084                 dbg_printk(TPACPI_DBG_EXIT,
4085                         "%s: acpi_remove_notify_handler\n", ibm->name);
4086                 BUG_ON(!ibm->acpi);
4087                 acpi_remove_notify_handler(*ibm->acpi->handle,
4088                                            ibm->acpi->type,
4089                                            dispatch_acpi_notify);
4090                 ibm->flags.acpi_notify_installed = 0;
4091                 ibm->flags.acpi_notify_installed = 0;
4092         }
4093
4094         if (ibm->flags.proc_created) {
4095                 dbg_printk(TPACPI_DBG_EXIT,
4096                         "%s: remove_proc_entry\n", ibm->name);
4097                 remove_proc_entry(ibm->name, proc_dir);
4098                 ibm->flags.proc_created = 0;
4099         }
4100
4101         if (ibm->flags.acpi_driver_registered) {
4102                 dbg_printk(TPACPI_DBG_EXIT,
4103                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4104                 BUG_ON(!ibm->acpi);
4105                 acpi_bus_unregister_driver(ibm->acpi->driver);
4106                 kfree(ibm->acpi->driver);
4107                 ibm->acpi->driver = NULL;
4108                 ibm->flags.acpi_driver_registered = 0;
4109         }
4110
4111         if (ibm->flags.init_called && ibm->exit) {
4112                 ibm->exit();
4113                 ibm->flags.init_called = 0;
4114         }
4115
4116         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4117 }
4118
4119 /* Probing */
4120
4121 static char *ibm_thinkpad_ec_found;
4122
4123 static char* __init check_dmi_for_ec(void)
4124 {
4125         struct dmi_device *dev = NULL;
4126         char ec_fw_string[18];
4127
4128         /*
4129          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4130          * X32 or newer, all Z series;  Some models must have an
4131          * up-to-date BIOS or they will not be detected.
4132          *
4133          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4134          */
4135         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4136                 if (sscanf(dev->name,
4137                            "IBM ThinkPad Embedded Controller -[%17c",
4138                            ec_fw_string) == 1) {
4139                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4140                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4141                         return kstrdup(ec_fw_string, GFP_KERNEL);
4142                 }
4143         }
4144         return NULL;
4145 }
4146
4147 static int __init probe_for_thinkpad(void)
4148 {
4149         int is_thinkpad;
4150
4151         if (acpi_disabled)
4152                 return -ENODEV;
4153
4154         /*
4155          * Non-ancient models have better DMI tagging, but very old models
4156          * don't.
4157          */
4158         is_thinkpad = dmi_name_in_vendors("ThinkPad");
4159
4160         /* ec is required because many other handles are relative to it */
4161         IBM_ACPIHANDLE_INIT(ec);
4162         if (!ec_handle) {
4163                 if (is_thinkpad)
4164                         printk(IBM_ERR
4165                                 "Not yet supported ThinkPad detected!\n");
4166                 return -ENODEV;
4167         }
4168
4169         /*
4170          * Risks a regression on very old machines, but reduces potential
4171          * false positives a damn great deal
4172          */
4173         if (!is_thinkpad)
4174                 is_thinkpad = dmi_name_in_vendors("IBM");
4175
4176         if (!is_thinkpad && !force_load)
4177                 return -ENODEV;
4178
4179         return 0;
4180 }
4181
4182
4183 /* Module init, exit, parameters */
4184
4185 static struct ibm_init_struct ibms_init[] __initdata = {
4186         {
4187                 .init = thinkpad_acpi_driver_init,
4188                 .data = &thinkpad_acpi_driver_data,
4189         },
4190         {
4191                 .init = hotkey_init,
4192                 .data = &hotkey_driver_data,
4193         },
4194         {
4195                 .init = bluetooth_init,
4196                 .data = &bluetooth_driver_data,
4197         },
4198         {
4199                 .init = wan_init,
4200                 .data = &wan_driver_data,
4201         },
4202         {
4203                 .init = video_init,
4204                 .data = &video_driver_data,
4205         },
4206         {
4207                 .init = light_init,
4208                 .data = &light_driver_data,
4209         },
4210 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4211         {
4212                 .init = dock_init,
4213                 .data = &dock_driver_data[0],
4214         },
4215         {
4216                 .init = dock_init2,
4217                 .data = &dock_driver_data[1],
4218         },
4219 #endif
4220 #ifdef CONFIG_THINKPAD_ACPI_BAY
4221         {
4222                 .init = bay_init,
4223                 .data = &bay_driver_data,
4224         },
4225 #endif
4226         {
4227                 .init = cmos_init,
4228                 .data = &cmos_driver_data,
4229         },
4230         {
4231                 .init = led_init,
4232                 .data = &led_driver_data,
4233         },
4234         {
4235                 .init = beep_init,
4236                 .data = &beep_driver_data,
4237         },
4238         {
4239                 .init = thermal_init,
4240                 .data = &thermal_driver_data,
4241         },
4242         {
4243                 .data = &ecdump_driver_data,
4244         },
4245         {
4246                 .init = brightness_init,
4247                 .data = &brightness_driver_data,
4248         },
4249         {
4250                 .data = &volume_driver_data,
4251         },
4252         {
4253                 .init = fan_init,
4254                 .data = &fan_driver_data,
4255         },
4256 };
4257
4258 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4259 {
4260         unsigned int i;
4261         struct ibm_struct *ibm;
4262
4263         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4264                 ibm = ibms_init[i].data;
4265                 BUG_ON(ibm == NULL);
4266
4267                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4268                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4269                                 return -ENOSPC;
4270                         strcpy(ibms_init[i].param, val);
4271                         strcat(ibms_init[i].param, ",");
4272                         return 0;
4273                 }
4274         }
4275
4276         return -EINVAL;
4277 }
4278
4279 static int experimental;
4280 module_param(experimental, int, 0);
4281
4282 static u32 dbg_level;
4283 module_param_named(debug, dbg_level, uint, 0);
4284
4285 static int force_load;
4286 module_param(force_load, int, 0);
4287
4288 static int fan_control_allowed;
4289 module_param_named(fan_control, fan_control_allowed, int, 0);
4290
4291 #define IBM_PARAM(feature) \
4292         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4293
4294 IBM_PARAM(hotkey);
4295 IBM_PARAM(bluetooth);
4296 IBM_PARAM(video);
4297 IBM_PARAM(light);
4298 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4299 IBM_PARAM(dock);
4300 #endif
4301 #ifdef CONFIG_THINKPAD_ACPI_BAY
4302 IBM_PARAM(bay);
4303 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4304 IBM_PARAM(cmos);
4305 IBM_PARAM(led);
4306 IBM_PARAM(beep);
4307 IBM_PARAM(ecdump);
4308 IBM_PARAM(brightness);
4309 IBM_PARAM(volume);
4310 IBM_PARAM(fan);
4311
4312 static int __init thinkpad_acpi_module_init(void)
4313 {
4314         int ret, i;
4315
4316         /* Driver-level probe */
4317         ret = probe_for_thinkpad();
4318         if (ret)
4319                 return ret;
4320
4321         /* Driver initialization */
4322         ibm_thinkpad_ec_found = check_dmi_for_ec();
4323         IBM_ACPIHANDLE_INIT(ecrd);
4324         IBM_ACPIHANDLE_INIT(ecwr);
4325
4326         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4327         if (!proc_dir) {
4328                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4329                 thinkpad_acpi_module_exit();
4330                 return -ENODEV;
4331         }
4332         proc_dir->owner = THIS_MODULE;
4333
4334         ret = platform_driver_register(&tpacpi_pdriver);
4335         if (ret) {
4336                 printk(IBM_ERR "unable to register platform driver\n");
4337                 thinkpad_acpi_module_exit();
4338                 return ret;
4339         }
4340         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4341         if (ret) {
4342                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4343                 thinkpad_acpi_module_exit();
4344                 return ret;
4345         }
4346
4347
4348         /* Device initialization */
4349         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4350                                                         NULL, 0);
4351         if (IS_ERR(tpacpi_pdev)) {
4352                 ret = PTR_ERR(tpacpi_pdev);
4353                 tpacpi_pdev = NULL;
4354                 printk(IBM_ERR "unable to register platform device\n");
4355                 thinkpad_acpi_module_exit();
4356                 return ret;
4357         }
4358         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4359         if (IS_ERR(tpacpi_hwmon)) {
4360                 ret = PTR_ERR(tpacpi_hwmon);
4361                 tpacpi_hwmon = NULL;
4362                 printk(IBM_ERR "unable to register hwmon device\n");
4363                 thinkpad_acpi_module_exit();
4364                 return ret;
4365         }
4366         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4367                 ret = ibm_init(&ibms_init[i]);
4368                 if (ret >= 0 && *ibms_init[i].param)
4369                         ret = ibms_init[i].data->write(ibms_init[i].param);
4370                 if (ret < 0) {
4371                         thinkpad_acpi_module_exit();
4372                         return ret;
4373                 }
4374         }
4375
4376         return 0;
4377 }
4378
4379 static void thinkpad_acpi_module_exit(void)
4380 {
4381         struct ibm_struct *ibm, *itmp;
4382
4383         list_for_each_entry_safe_reverse(ibm, itmp,
4384                                          &tpacpi_all_drivers,
4385                                          all_drivers) {
4386                 ibm_exit(ibm);
4387         }
4388
4389         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4390
4391         if (tpacpi_hwmon)
4392                 hwmon_device_unregister(tpacpi_hwmon);
4393
4394         if (tpacpi_pdev)
4395                 platform_device_unregister(tpacpi_pdev);
4396
4397         tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4398         platform_driver_unregister(&tpacpi_pdriver);
4399
4400         if (proc_dir)
4401                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4402
4403         kfree(ibm_thinkpad_ec_found);
4404 }
4405
4406 module_init(thinkpad_acpi_module_init);
4407 module_exit(thinkpad_acpi_module_exit);