drivers/misc/thinkpad_acpi.c

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