drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define IBM_VERSION "0.14"
  25 #define TPACPI_SYSFS_VERSION 0x000200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  30  *                      drivers/misc.
  31  *
  32  *  2006-11-22  0.13    new maintainer
  33  *                      changelog now lives in git commit history, and will
  34  *                      not be updated further in-file.
  35  *
  36  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  37  *  2005-03-17  0.11    support for 600e, 770x
  38  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  39  *                      support for 770e, G41
  40  *                      G40 and G41 don't have a thinklight
  41  *                      temperatures no longer experimental
  42  *                      experimental brightness control
  43  *                      experimental volume control
  44  *                      experimental fan enable/disable
  45  *  2005-01-16  0.10    fix module loading on R30, R31
  46  *  2005-01-16  0.9     support for 570, R30, R31
  47  *                      ultrabay support on A22p, A3x
  48  *                      limit arg for cmos, led, beep, drop experimental status
  49  *                      more capable led control on A21e, A22p, T20-22, X20
  50  *                      experimental temperatures and fan speed
  51  *                      experimental embedded controller register dump
  52  *                      mark more functions as __init, drop incorrect __exit
  53  *                      use MODULE_VERSION
  54  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  55  *                      fix parameter passing on module loading
  56  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  57  *                          thanks to Jim Radford <radford@blackbean.org>
  58  *  2004-11-08  0.8     fix init error case, don't return from a macro
  59  *                          thanks to Chris Wright <chrisw@osdl.org>
  60  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  61  *                      fix led control on A21e
  62  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  63  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  64  *                      proc file format changed
  65  *                      video_switch command
  66  *                      experimental cmos control
  67  *                      experimental led control
  68  *                      experimental acpi sounds
  69  *  2004-09-16  0.4     support for module parameters
  70  *                      hotkey mask can be prefixed by 0x
  71  *                      video output switching
  72  *                      video expansion control
  73  *                      ultrabay eject support
  74  *                      removed lcd brightness/on/off control, didn't work
  75  *  2004-08-17  0.3     support for R40
  76  *                      lcd off, brightness control
  77  *                      thinklight on/off
  78  *  2004-08-14  0.2     support for T series, X20
  79  *                      bluetooth enable/disable
  80  *                      hotkey events disabled by default
  81  *                      removed fan control, currently useless
  82  *  2004-08-09  0.1     initial release, support for X series
  83  */
  84
  85 #include "thinkpad_acpi.h"
  86
  87 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
  88 MODULE_DESCRIPTION(IBM_DESC);
  89 MODULE_VERSION(IBM_VERSION);
  90 MODULE_LICENSE("GPL");
  91
  92 /* Please remove this in year 2009 */
  93 MODULE_ALIAS("ibm_acpi");
  94
  95 /*
  96  * DMI matching for module autoloading
  97  *
  98  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
  99  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 100  *
 101  * Only models listed in thinkwiki will be supported, so add yours
 102  * if it is not there yet.
 103  */
 104 #define IBM_BIOS_MODULE_ALIAS(__type) \
 105         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
 106
 107 /* Non-ancient thinkpads */
 108 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
 109 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
 110
 111 /* Ancient thinkpad BIOSes have to be identified by
 112  * BIOS type or model number, and there are far less
 113  * BIOS types than model numbers... */
 114 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
 115 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
 116 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 117
 118 #define __unused __attribute__ ((unused))
 119
 120 /****************************************************************************
 121  ****************************************************************************
 122  *
 123  * ACPI Helpers and device model
 124  *
 125  ****************************************************************************
 126  ****************************************************************************/
 127
 128 /*************************************************************************
 129  * ACPI basic handles
 130  */
 131
 132 static acpi_handle root_handle;
 133
 134 #define IBM_HANDLE(object, parent, paths...)                    \
 135         static acpi_handle  object##_handle;                    \
 136         static acpi_handle *object##_parent = &parent##_handle; \
 137         static char        *object##_path;                      \
 138         static char        *object##_paths[] = { paths }
 139
 140 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 141            "\\_SB.PCI.ISA.EC",  /* 570 */
 142            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 143            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 144            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 145            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 146            "\\_SB.PCI0.LPC.EC", /* all others */
 147            );
 148
 149 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 150 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 151
 152
 153 /*************************************************************************
 154  * Misc ACPI handles
 155  */
 156
 157 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 158            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 159            "\\CMS",             /* R40, R40e */
 160            );                   /* all others */
 161
 162 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 163            "^HKEY",             /* R30, R31 */
 164            "HKEY",              /* all others */
 165            );                   /* 570 */
 166
 167
 168 /*************************************************************************
 169  * ACPI helpers
 170  */
 171
 172 static int acpi_evalf(acpi_handle handle,
 173                       void *res, char *method, char *fmt, ...)
 174 {
 175         char *fmt0 = fmt;
 176         struct acpi_object_list params;
 177         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 178         struct acpi_buffer result, *resultp;
 179         union acpi_object out_obj;
 180         acpi_status status;
 181         va_list ap;
 182         char res_type;
 183         int success;
 184         int quiet;
 185
 186         if (!*fmt) {
 187                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 188                 return 0;
 189         }
 190
 191         if (*fmt == 'q') {
 192                 quiet = 1;
 193                 fmt++;
 194         } else
 195                 quiet = 0;
 196
 197         res_type = *(fmt++);
 198
 199         params.count = 0;
 200         params.pointer = &in_objs[0];
 201
 202         va_start(ap, fmt);
 203         while (*fmt) {
 204                 char c = *(fmt++);
 205                 switch (c) {
 206                 case 'd':       /* int */
 207                         in_objs[params.count].integer.value = va_arg(ap, int);
 208                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 209                         break;
 210                         /* add more types as needed */
 211                 default:
 212                         printk(IBM_ERR "acpi_evalf() called "
 213                                "with invalid format character '%c'\n", c);
 214                         return 0;
 215                 }
 216         }
 217         va_end(ap);
 218
 219         if (res_type != 'v') {
 220                 result.length = sizeof(out_obj);
 221                 result.pointer = &out_obj;
 222                 resultp = &result;
 223         } else
 224                 resultp = NULL;
 225
 226         status = acpi_evaluate_object(handle, method, &params, resultp);
 227
 228         switch (res_type) {
 229         case 'd':               /* int */
 230                 if (res)
 231                         *(int *)res = out_obj.integer.value;
 232                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 233                 break;
 234         case 'v':               /* void */
 235                 success = status == AE_OK;
 236                 break;
 237                 /* add more types as needed */
 238         default:
 239                 printk(IBM_ERR "acpi_evalf() called "
 240                        "with invalid format character '%c'\n", res_type);
 241                 return 0;
 242         }
 243
 244         if (!success && !quiet)
 245                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 246                        method, fmt0, status);
 247
 248         return success;
 249 }
 250
 251 static void __unused acpi_print_int(acpi_handle handle, char *method)
 252 {
 253         int i;
 254
 255         if (acpi_evalf(handle, &i, method, "d"))
 256                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 257         else
 258                 printk(IBM_ERR "error calling %s\n", method);
 259 }
 260
 261 static int acpi_ec_read(int i, u8 * p)
 262 {
 263         int v;
 264
 265         if (ecrd_handle) {
 266                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 267                         return 0;
 268                 *p = v;
 269         } else {
 270                 if (ec_read(i, p) < 0)
 271                         return 0;
 272         }
 273
 274         return 1;
 275 }
 276
 277 static int acpi_ec_write(int i, u8 v)
 278 {
 279         if (ecwr_handle) {
 280                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 281                         return 0;
 282         } else {
 283                 if (ec_write(i, v) < 0)
 284                         return 0;
 285         }
 286
 287         return 1;
 288 }
 289
 290 static int _sta(acpi_handle handle)
 291 {
 292         int status;
 293
 294         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 295                 status = 0;
 296
 297         return status;
 298 }
 299
 300 static int issue_thinkpad_cmos_command(int cmos_cmd)
 301 {
 302         if (!cmos_handle)
 303                 return -ENXIO;
 304
 305         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 306                 return -EIO;
 307
 308         return 0;
 309 }
 310
 311 /*************************************************************************
 312  * ACPI device model
 313  */
 314
 315 static void drv_acpi_handle_init(char *name,
 316                            acpi_handle *handle, acpi_handle parent,
 317                            char **paths, int num_paths, char **path)
 318 {
 319         int i;
 320         acpi_status status;
 321
 322         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 323                 name);
 324
 325         for (i = 0; i < num_paths; i++) {
 326                 status = acpi_get_handle(parent, paths[i], handle);
 327                 if (ACPI_SUCCESS(status)) {
 328                         *path = paths[i];
 329                         dbg_printk(TPACPI_DBG_INIT,
 330                                    "Found ACPI handle %s for %s\n",
 331                                    *path, name);
 332                         return;
 333                 }
 334         }
 335
 336         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 337                     name);
 338         *handle = NULL;
 339 }
 340
 341 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 342 {
 343         struct ibm_struct *ibm = data;
 344
 345         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 346                 return;
 347
 348         ibm->acpi->notify(ibm, event);
 349 }
 350
 351 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 352 {
 353         acpi_status status;
 354         int rc;
 355
 356         BUG_ON(!ibm->acpi);
 357
 358         if (!*ibm->acpi->handle)
 359                 return 0;
 360
 361         vdbg_printk(TPACPI_DBG_INIT,
 362                 "setting up ACPI notify for %s\n", ibm->name);
 363
 364         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 365         if (rc < 0) {
 366                 printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
 367                         ibm->name, rc);
 368                 return -ENODEV;
 369         }
 370
 371         acpi_driver_data(ibm->acpi->device) = ibm;
 372         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 373                 IBM_ACPI_EVENT_PREFIX,
 374                 ibm->name);
 375
 376         status = acpi_install_notify_handler(*ibm->acpi->handle,
 377                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 378         if (ACPI_FAILURE(status)) {
 379                 if (status == AE_ALREADY_EXISTS) {
 380                         printk(IBM_NOTICE "another device driver is already handling %s events\n",
 381                                 ibm->name);
 382                 } else {
 383                         printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
 384                                 ibm->name, status);
 385                 }
 386                 return -ENODEV;
 387         }
 388         ibm->flags.acpi_notify_installed = 1;
 389         return 0;
 390 }
 391
 392 static int __init tpacpi_device_add(struct acpi_device *device)
 393 {
 394         return 0;
 395 }
 396
 397 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 398 {
 399         int rc;
 400
 401         dbg_printk(TPACPI_DBG_INIT,
 402                 "registering %s as an ACPI driver\n", ibm->name);
 403
 404         BUG_ON(!ibm->acpi);
 405
 406         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 407         if (!ibm->acpi->driver) {
 408                 printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
 409                 return -ENOMEM;
 410         }
 411
 412         sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
 413         ibm->acpi->driver->ids = ibm->acpi->hid;
 414         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 415
 416         rc = acpi_bus_register_driver(ibm->acpi->driver);
 417         if (rc < 0) {
 418                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 419                        ibm->acpi->hid, rc);
 420                 kfree(ibm->acpi->driver);
 421                 ibm->acpi->driver = NULL;
 422         } else if (!rc)
 423                 ibm->flags.acpi_driver_registered = 1;
 424
 425         return rc;
 426 }
 427
 428
 429 /****************************************************************************
 430  ****************************************************************************
 431  *
 432  * Procfs Helpers
 433  *
 434  ****************************************************************************
 435  ****************************************************************************/
 436
 437 static int dispatch_procfs_read(char *page, char **start, off_t off,
 438                         int count, int *eof, void *data)
 439 {
 440         struct ibm_struct *ibm = data;
 441         int len;
 442
 443         if (!ibm || !ibm->read)
 444                 return -EINVAL;
 445
 446         len = ibm->read(page);
 447         if (len < 0)
 448                 return len;
 449
 450         if (len <= off + count)
 451                 *eof = 1;
 452         *start = page + off;
 453         len -= off;
 454         if (len > count)
 455                 len = count;
 456         if (len < 0)
 457                 len = 0;
 458
 459         return len;
 460 }
 461
 462 static int dispatch_procfs_write(struct file *file,
 463                         const char __user * userbuf,
 464                         unsigned long count, void *data)
 465 {
 466         struct ibm_struct *ibm = data;
 467         char *kernbuf;
 468         int ret;
 469
 470         if (!ibm || !ibm->write)
 471                 return -EINVAL;
 472
 473         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 474         if (!kernbuf)
 475                 return -ENOMEM;
 476
 477         if (copy_from_user(kernbuf, userbuf, count)) {
 478                 kfree(kernbuf);
 479                 return -EFAULT;
 480         }
 481
 482         kernbuf[count] = 0;
 483         strcat(kernbuf, ",");
 484         ret = ibm->write(kernbuf);
 485         if (ret == 0)
 486                 ret = count;
 487
 488         kfree(kernbuf);
 489
 490         return ret;
 491 }
 492
 493 static char *next_cmd(char **cmds)
 494 {
 495         char *start = *cmds;
 496         char *end;
 497
 498         while ((end = strchr(start, ',')) && end == start)
 499                 start = end + 1;
 500
 501         if (!end)
 502                 return NULL;
 503
 504         *end = 0;
 505         *cmds = end + 1;
 506         return start;
 507 }
 508
 509
 510 /****************************************************************************
 511  ****************************************************************************
 512  *
 513  * Device model: input, hwmon and platform
 514  *
 515  ****************************************************************************
 516  ****************************************************************************/
 517
 518 static struct platform_device *tpacpi_pdev;
 519 static struct class_device *tpacpi_hwmon;
 520 static struct input_dev *tpacpi_inputdev;
 521
 522 static struct platform_driver tpacpi_pdriver = {
 523         .driver = {
 524                 .name = IBM_DRVR_NAME,
 525                 .owner = THIS_MODULE,
 526         },
 527 };
 528
 529
 530 /*************************************************************************
 531  * thinkpad-acpi driver attributes
 532  */
 533
 534 /* interface_version --------------------------------------------------- */
 535 static ssize_t tpacpi_driver_interface_version_show(
 536                                 struct device_driver *drv,
 537                                 char *buf)
 538 {
 539         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 540 }
 541
 542 static DRIVER_ATTR(interface_version, S_IRUGO,
 543                 tpacpi_driver_interface_version_show, NULL);
 544
 545 /* debug_level --------------------------------------------------------- */
 546 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 547                                                 char *buf)
 548 {
 549         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 550 }
 551
 552 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 553                                                 const char *buf, size_t count)
 554 {
 555         unsigned long t;
 556
 557         if (parse_strtoul(buf, 0xffff, &t))
 558                 return -EINVAL;
 559
 560         dbg_level = t;
 561
 562         return count;
 563 }
 564
 565 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 566                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 567
 568 /* version ------------------------------------------------------------- */
 569 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 570                                                 char *buf)
 571 {
 572         return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
 573 }
 574
 575 static DRIVER_ATTR(version, S_IRUGO,
 576                 tpacpi_driver_version_show, NULL);
 577
 578 /* --------------------------------------------------------------------- */
 579
 580 static struct driver_attribute* tpacpi_driver_attributes[] = {
 581         &driver_attr_debug_level, &driver_attr_version,
 582         &driver_attr_interface_version,
 583 };
 584
 585 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 586 {
 587         int i, res;
 588
 589         i = 0;
 590         res = 0;
 591         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 592                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 593                 i++;
 594         }
 595
 596         return res;
 597 }
 598
 599 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 600 {
 601         int i;
 602
 603         for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 604                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 605 }
 606
 607 /*************************************************************************
 608  * sysfs support helpers
 609  */
 610
 611 struct attribute_set_obj {
 612         struct attribute_set s;
 613         struct attribute *a;
 614 } __attribute__((packed));
 615
 616 static struct attribute_set *create_attr_set(unsigned int max_members,
 617                                                 const char* name)
 618 {
 619         struct attribute_set_obj *sobj;
 620
 621         if (max_members == 0)
 622                 return NULL;
 623
 624         /* Allocates space for implicit NULL at the end too */
 625         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 626                     max_members * sizeof(struct attribute *),
 627                     GFP_KERNEL);
 628         if (!sobj)
 629                 return NULL;
 630         sobj->s.max_members = max_members;
 631         sobj->s.group.attrs = &sobj->a;
 632         sobj->s.group.name = name;
 633
 634         return &sobj->s;
 635 }
 636
 637 /* not multi-threaded safe, use it in a single thread per set */
 638 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
 639 {
 640         if (!s || !attr)
 641                 return -EINVAL;
 642
 643         if (s->members >= s->max_members)
 644                 return -ENOMEM;
 645
 646         s->group.attrs[s->members] = attr;
 647         s->members++;
 648
 649         return 0;
 650 }
 651
 652 static int add_many_to_attr_set(struct attribute_set* s,
 653                         struct attribute **attr,
 654                         unsigned int count)
 655 {
 656         int i, res;
 657
 658         for (i = 0; i < count; i++) {
 659                 res = add_to_attr_set(s, attr[i]);
 660                 if (res)
 661                         return res;
 662         }
 663
 664         return 0;
 665 }
 666
 667 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
 668 {
 669         sysfs_remove_group(kobj, &s->group);
 670         destroy_attr_set(s);
 671 }
 672
 673 static int parse_strtoul(const char *buf,
 674                 unsigned long max, unsigned long *value)
 675 {
 676         char *endp;
 677
 678         *value = simple_strtoul(buf, &endp, 0);
 679         while (*endp && isspace(*endp))
 680                 endp++;
 681         if (*endp || *value > max)
 682                 return -EINVAL;
 683
 684         return 0;
 685 }
 686
 687 /****************************************************************************
 688  ****************************************************************************
 689  *
 690  * Subdrivers
 691  *
 692  ****************************************************************************
 693  ****************************************************************************/
 694
 695 /*************************************************************************
 696  * thinkpad-acpi init subdriver
 697  */
 698
 699 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 700 {
 701         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 702         printk(IBM_INFO "%s\n", IBM_URL);
 703
 704         if (ibm_thinkpad_ec_found)
 705                 printk(IBM_INFO "ThinkPad EC firmware %s\n",
 706                        ibm_thinkpad_ec_found);
 707
 708         return 0;
 709 }
 710
 711 static int thinkpad_acpi_driver_read(char *p)
 712 {
 713         int len = 0;
 714
 715         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 716         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 717
 718         return len;
 719 }
 720
 721 static struct ibm_struct thinkpad_acpi_driver_data = {
 722         .name = "driver",
 723         .read = thinkpad_acpi_driver_read,
 724 };
 725
 726 /*************************************************************************
 727  * Hotkey subdriver
 728  */
 729
 730 static int hotkey_orig_status;
 731 static u32 hotkey_orig_mask;
 732 static u32 hotkey_all_mask;
 733 static u32 hotkey_reserved_mask = 0x00778000;
 734
 735 static struct attribute_set *hotkey_dev_attributes;
 736
 737 static int hotkey_get_wlsw(int *status)
 738 {
 739         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
 740                 return -EIO;
 741         return 0;
 742 }
 743
 744 /* sysfs hotkey enable ------------------------------------------------- */
 745 static ssize_t hotkey_enable_show(struct device *dev,
 746                            struct device_attribute *attr,
 747                            char *buf)
 748 {
 749         int res, status;
 750         u32 mask;
 751
 752         res = hotkey_get(&status, &mask);
 753         if (res)
 754                 return res;
 755
 756         return snprintf(buf, PAGE_SIZE, "%d\n", status);
 757 }
 758
 759 static ssize_t hotkey_enable_store(struct device *dev,
 760                             struct device_attribute *attr,
 761                             const char *buf, size_t count)
 762 {
 763         unsigned long t;
 764         int res, status;
 765         u32 mask;
 766
 767         if (parse_strtoul(buf, 1, &t))
 768                 return -EINVAL;
 769
 770         res = hotkey_get(&status, &mask);
 771         if (!res)
 772                 res = hotkey_set(t, mask);
 773
 774         return (res) ? res : count;
 775 }
 776
 777 static struct device_attribute dev_attr_hotkey_enable =
 778         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
 779                 hotkey_enable_show, hotkey_enable_store);
 780
 781 /* sysfs hotkey mask --------------------------------------------------- */
 782 static ssize_t hotkey_mask_show(struct device *dev,
 783                            struct device_attribute *attr,
 784                            char *buf)
 785 {
 786         int res, status;
 787         u32 mask;
 788
 789         res = hotkey_get(&status, &mask);
 790         if (res)
 791                 return res;
 792
 793         return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
 794 }
 795
 796 static ssize_t hotkey_mask_store(struct device *dev,
 797                             struct device_attribute *attr,
 798                             const char *buf, size_t count)
 799 {
 800         unsigned long t;
 801         int res, status;
 802         u32 mask;
 803
 804         if (parse_strtoul(buf, 0xffffffffUL, &t))
 805                 return -EINVAL;
 806
 807         res = hotkey_get(&status, &mask);
 808         if (!res)
 809                 hotkey_set(status, t);
 810
 811         return (res) ? res : count;
 812 }
 813
 814 static struct device_attribute dev_attr_hotkey_mask =
 815         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
 816                 hotkey_mask_show, hotkey_mask_store);
 817
 818 /* sysfs hotkey bios_enabled ------------------------------------------- */
 819 static ssize_t hotkey_bios_enabled_show(struct device *dev,
 820                            struct device_attribute *attr,
 821                            char *buf)
 822 {
 823         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
 824 }
 825
 826 static struct device_attribute dev_attr_hotkey_bios_enabled =
 827         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
 828
 829 /* sysfs hotkey bios_mask ---------------------------------------------- */
 830 static ssize_t hotkey_bios_mask_show(struct device *dev,
 831                            struct device_attribute *attr,
 832                            char *buf)
 833 {
 834         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
 835 }
 836
 837 static struct device_attribute dev_attr_hotkey_bios_mask =
 838         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
 839
 840 /* sysfs hotkey all_mask ----------------------------------------------- */
 841 static ssize_t hotkey_all_mask_show(struct device *dev,
 842                            struct device_attribute *attr,
 843                            char *buf)
 844 {
 845         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
 846 }
 847
 848 static struct device_attribute dev_attr_hotkey_all_mask =
 849         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
 850
 851 /* sysfs hotkey recommended_mask --------------------------------------- */
 852 static ssize_t hotkey_recommended_mask_show(struct device *dev,
 853                                             struct device_attribute *attr,
 854                                             char *buf)
 855 {
 856         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
 857                         hotkey_all_mask & ~hotkey_reserved_mask);
 858 }
 859
 860 static struct device_attribute dev_attr_hotkey_recommended_mask =
 861         __ATTR(hotkey_recommended_mask, S_IRUGO,
 862                 hotkey_recommended_mask_show, NULL);
 863
 864 /* sysfs hotkey radio_sw ----------------------------------------------- */
 865 static ssize_t hotkey_radio_sw_show(struct device *dev,
 866                            struct device_attribute *attr,
 867                            char *buf)
 868 {
 869         int res, s;
 870         res = hotkey_get_wlsw(&s);
 871         if (res < 0)
 872                 return res;
 873
 874         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
 875 }
 876
 877 static struct device_attribute dev_attr_hotkey_radio_sw =
 878         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
 879
 880 /* --------------------------------------------------------------------- */
 881
 882 static struct attribute *hotkey_mask_attributes[] = {
 883         &dev_attr_hotkey_mask.attr,
 884         &dev_attr_hotkey_bios_enabled.attr,
 885         &dev_attr_hotkey_bios_mask.attr,
 886         &dev_attr_hotkey_all_mask.attr,
 887         &dev_attr_hotkey_recommended_mask.attr,
 888 };
 889
 890 static int __init hotkey_init(struct ibm_init_struct *iibm)
 891 {
 892         int res;
 893         int status;
 894
 895         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 896
 897         IBM_ACPIHANDLE_INIT(hkey);
 898         mutex_init(&hotkey_mutex);
 899
 900         /* hotkey not supported on 570 */
 901         tp_features.hotkey = hkey_handle != NULL;
 902
 903         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
 904                 str_supported(tp_features.hotkey));
 905
 906         if (tp_features.hotkey) {
 907                 hotkey_dev_attributes = create_attr_set(7, NULL);
 908                 if (!hotkey_dev_attributes)
 909                         return -ENOMEM;
 910                 res = add_to_attr_set(hotkey_dev_attributes,
 911                                 &dev_attr_hotkey_enable.attr);
 912                 if (res)
 913                         return res;
 914
 915                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 916                    A30, R30, R31, T20-22, X20-21, X22-24 */
 917                 tp_features.hotkey_mask =
 918                         acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 919
 920                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 921                         str_supported(tp_features.hotkey_mask));
 922
 923                 if (tp_features.hotkey_mask) {
 924                         /* MHKA available in A31, R40, R40e, T4x, X31, and later */
 925                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
 926                                         "MHKA", "qd"))
 927                                 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
 928                 }
 929
 930                 res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
 931                 if (!res && tp_features.hotkey_mask) {
 932                         res = add_many_to_attr_set(hotkey_dev_attributes,
 933                                 hotkey_mask_attributes,
 934                                 ARRAY_SIZE(hotkey_mask_attributes));
 935                 }
 936
 937                 /* Not all thinkpads have a hardware radio switch */
 938                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
 939                         tp_features.hotkey_wlsw = 1;
 940                         printk(IBM_INFO
 941                                 "radio switch found; radios are %s\n",
 942                                 enabled(status, 0));
 943                         res = add_to_attr_set(hotkey_dev_attributes,
 944                                         &dev_attr_hotkey_radio_sw.attr);
 945                 }
 946
 947                 if (!res)
 948                         res = register_attr_set_with_sysfs(
 949                                         hotkey_dev_attributes,
 950                                         &tpacpi_pdev->dev.kobj);
 951                 if (res)
 952                         return res;
 953         }
 954
 955         return (tp_features.hotkey)? 0 : 1;
 956 }
 957
 958 static void hotkey_exit(void)
 959 {
 960         int res;
 961
 962         if (tp_features.hotkey) {
 963                 dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
 964                 res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 965                 if (res)
 966                         printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
 967         }
 968
 969         if (hotkey_dev_attributes) {
 970                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
 971                 hotkey_dev_attributes = NULL;
 972         }
 973 }
 974
 975 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 976 {
 977         int hkey;
 978
 979         if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
 980                 acpi_bus_generate_event(ibm->acpi->device, event, hkey);
 981         } else {
 982                 printk(IBM_ERR "unknown hotkey notification event %d\n", event);
 983                 acpi_bus_generate_event(ibm->acpi->device, event, 0);
 984         }
 985 }
 986
 987 /*
 988  * Call with hotkey_mutex held
 989  */
 990 static int hotkey_get(int *status, u32 *mask)
 991 {
 992         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 993                 return -EIO;
 994
 995         if (tp_features.hotkey_mask)
 996                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 997                         return -EIO;
 998
 999         return 0;
1000 }
1001
1002 /*
1003  * Call with hotkey_mutex held
1004  */
1005 static int hotkey_set(int status, u32 mask)
1006 {
1007         int i;
1008
1009         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1010                 return -EIO;
1011
1012         if (tp_features.hotkey_mask)
1013                 for (i = 0; i < 32; i++) {
1014                         int bit = ((1 << i) & mask) != 0;
1015                         if (!acpi_evalf(hkey_handle,
1016                                         NULL, "MHKM", "vdd", i + 1, bit))
1017                                 return -EIO;
1018                 }
1019
1020         return 0;
1021 }
1022
1023 /* procfs -------------------------------------------------------------- */
1024 static int hotkey_read(char *p)
1025 {
1026         int res, status;
1027         u32 mask;
1028         int len = 0;
1029
1030         if (!tp_features.hotkey) {
1031                 len += sprintf(p + len, "status:\t\tnot supported\n");
1032                 return len;
1033         }
1034
1035         res = mutex_lock_interruptible(&hotkey_mutex);
1036         if (res < 0)
1037                 return res;
1038         res = hotkey_get(&status, &mask);
1039         mutex_unlock(&hotkey_mutex);
1040         if (res)
1041                 return res;
1042
1043         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
1044         if (tp_features.hotkey_mask) {
1045                 len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
1046                 len += sprintf(p + len,
1047                                "commands:\tenable, disable, reset, <mask>\n");
1048         } else {
1049                 len += sprintf(p + len, "mask:\t\tnot supported\n");
1050                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
1051         }
1052
1053         return len;
1054 }
1055
1056 static int hotkey_write(char *buf)
1057 {
1058         int res, status;
1059         u32 mask;
1060         char *cmd;
1061         int do_cmd = 0;
1062
1063         if (!tp_features.hotkey)
1064                 return -ENODEV;
1065
1066         res = mutex_lock_interruptible(&hotkey_mutex);
1067         if (res < 0)
1068                 return res;
1069
1070         res = hotkey_get(&status, &mask);
1071         if (res)
1072                 goto errexit;
1073
1074         res = 0;
1075         while ((cmd = next_cmd(&buf))) {
1076                 if (strlencmp(cmd, "enable") == 0) {
1077                         status = 1;
1078                 } else if (strlencmp(cmd, "disable") == 0) {
1079                         status = 0;
1080                 } else if (strlencmp(cmd, "reset") == 0) {
1081                         status = hotkey_orig_status;
1082                         mask = hotkey_orig_mask;
1083                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
1084                         /* mask set */
1085                 } else if (sscanf(cmd, "%x", &mask) == 1) {
1086                         /* mask set */
1087                 } else {
1088                         res = -EINVAL;
1089                         goto errexit;
1090                 }
1091                 do_cmd = 1;
1092         }
1093
1094         if (do_cmd)
1095                 res = hotkey_set(status, mask);
1096
1097 errexit:
1098         mutex_unlock(&hotkey_mutex);
1099         return res;
1100 }
1101
1102 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
1103         .hid = IBM_HKEY_HID,
1104         .notify = hotkey_notify,
1105         .handle = &hkey_handle,
1106         .type = ACPI_DEVICE_NOTIFY,
1107 };
1108
1109 static struct ibm_struct hotkey_driver_data = {
1110         .name = "hotkey",
1111         .read = hotkey_read,
1112         .write = hotkey_write,
1113         .exit = hotkey_exit,
1114         .acpi = &ibm_hotkey_acpidriver,
1115 };
1116
1117 /*************************************************************************
1118  * Bluetooth subdriver
1119  */
1120
1121 /* sysfs bluetooth enable ---------------------------------------------- */
1122 static ssize_t bluetooth_enable_show(struct device *dev,
1123                            struct device_attribute *attr,
1124                            char *buf)
1125 {
1126         int status;
1127
1128         status = bluetooth_get_radiosw();
1129         if (status < 0)
1130                 return status;
1131
1132         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1133 }
1134
1135 static ssize_t bluetooth_enable_store(struct device *dev,
1136                             struct device_attribute *attr,
1137                             const char *buf, size_t count)
1138 {
1139         unsigned long t;
1140         int res;
1141
1142         if (parse_strtoul(buf, 1, &t))
1143                 return -EINVAL;
1144
1145         res = bluetooth_set_radiosw(t);
1146
1147         return (res) ? res : count;
1148 }
1149
1150 static struct device_attribute dev_attr_bluetooth_enable =
1151         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
1152                 bluetooth_enable_show, bluetooth_enable_store);
1153
1154 /* --------------------------------------------------------------------- */
1155
1156 static struct attribute *bluetooth_attributes[] = {
1157         &dev_attr_bluetooth_enable.attr,
1158         NULL
1159 };
1160
1161 static const struct attribute_group bluetooth_attr_group = {
1162         .attrs = bluetooth_attributes,
1163 };
1164
1165 static int __init bluetooth_init(struct ibm_init_struct *iibm)
1166 {
1167         int res;
1168         int status = 0;
1169
1170         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
1171
1172         IBM_ACPIHANDLE_INIT(hkey);
1173
1174         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1175            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
1176         tp_features.bluetooth = hkey_handle &&
1177             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
1178
1179         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
1180                 str_supported(tp_features.bluetooth),
1181                 status);
1182
1183         if (tp_features.bluetooth) {
1184                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
1185                         /* no bluetooth hardware present in system */
1186                         tp_features.bluetooth = 0;
1187                         dbg_printk(TPACPI_DBG_INIT,
1188                                    "bluetooth hardware not installed\n");
1189                 } else {
1190                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1191                                         &bluetooth_attr_group);
1192                         if (res)
1193                                 return res;
1194                 }
1195         }
1196
1197         return (tp_features.bluetooth)? 0 : 1;
1198 }
1199
1200 static void bluetooth_exit(void)
1201 {
1202         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1203                         &bluetooth_attr_group);
1204 }
1205
1206 static int bluetooth_get_radiosw(void)
1207 {
1208         int status;
1209
1210         if (!tp_features.bluetooth)
1211                 return -ENODEV;
1212
1213         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1214                 return -EIO;
1215
1216         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
1217 }
1218
1219 static int bluetooth_set_radiosw(int radio_on)
1220 {
1221         int status;
1222
1223         if (!tp_features.bluetooth)
1224                 return -ENODEV;
1225
1226         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
1227                 return -EIO;
1228         if (radio_on)
1229                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
1230         else
1231                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
1232         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
1233                 return -EIO;
1234
1235         return 0;
1236 }
1237
1238 /* procfs -------------------------------------------------------------- */
1239 static int bluetooth_read(char *p)
1240 {
1241         int len = 0;
1242         int status = bluetooth_get_radiosw();
1243
1244         if (!tp_features.bluetooth)
1245                 len += sprintf(p + len, "status:\t\tnot supported\n");
1246         else {
1247                 len += sprintf(p + len, "status:\t\t%s\n",
1248                                 (status)? "enabled" : "disabled");
1249                 len += sprintf(p + len, "commands:\tenable, disable\n");
1250         }
1251
1252         return len;
1253 }
1254
1255 static int bluetooth_write(char *buf)
1256 {
1257         char *cmd;
1258
1259         if (!tp_features.bluetooth)
1260                 return -ENODEV;
1261
1262         while ((cmd = next_cmd(&buf))) {
1263                 if (strlencmp(cmd, "enable") == 0) {
1264                         bluetooth_set_radiosw(1);
1265                 } else if (strlencmp(cmd, "disable") == 0) {
1266                         bluetooth_set_radiosw(0);
1267                 } else
1268                         return -EINVAL;
1269         }
1270
1271         return 0;
1272 }
1273
1274 static struct ibm_struct bluetooth_driver_data = {
1275         .name = "bluetooth",
1276         .read = bluetooth_read,
1277         .write = bluetooth_write,
1278         .exit = bluetooth_exit,
1279 };
1280
1281 /*************************************************************************
1282  * Wan subdriver
1283  */
1284
1285 /* sysfs wan enable ---------------------------------------------------- */
1286 static ssize_t wan_enable_show(struct device *dev,
1287                            struct device_attribute *attr,
1288                            char *buf)
1289 {
1290         int status;
1291
1292         status = wan_get_radiosw();
1293         if (status < 0)
1294                 return status;
1295
1296         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
1297 }
1298
1299 static ssize_t wan_enable_store(struct device *dev,
1300                             struct device_attribute *attr,
1301                             const char *buf, size_t count)
1302 {
1303         unsigned long t;
1304         int res;
1305
1306         if (parse_strtoul(buf, 1, &t))
1307                 return -EINVAL;
1308
1309         res = wan_set_radiosw(t);
1310
1311         return (res) ? res : count;
1312 }
1313
1314 static struct device_attribute dev_attr_wan_enable =
1315         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
1316                 wan_enable_show, wan_enable_store);
1317
1318 /* --------------------------------------------------------------------- */
1319
1320 static struct attribute *wan_attributes[] = {
1321         &dev_attr_wan_enable.attr,
1322         NULL
1323 };
1324
1325 static const struct attribute_group wan_attr_group = {
1326         .attrs = wan_attributes,
1327 };
1328
1329 static int __init wan_init(struct ibm_init_struct *iibm)
1330 {
1331         int res;
1332         int status = 0;
1333
1334         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
1335
1336         IBM_ACPIHANDLE_INIT(hkey);
1337
1338         tp_features.wan = hkey_handle &&
1339             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
1340
1341         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
1342                 str_supported(tp_features.wan),
1343                 status);
1344
1345         if (tp_features.wan) {
1346                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
1347                         /* no wan hardware present in system */
1348                         tp_features.wan = 0;
1349                         dbg_printk(TPACPI_DBG_INIT,
1350                                    "wan hardware not installed\n");
1351                 } else {
1352                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
1353                                         &wan_attr_group);
1354                         if (res)
1355                                 return res;
1356                 }
1357         }
1358
1359         return (tp_features.wan)? 0 : 1;
1360 }
1361
1362 static void wan_exit(void)
1363 {
1364         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
1365                 &wan_attr_group);
1366 }
1367
1368 static int wan_get_radiosw(void)
1369 {
1370         int status;
1371
1372         if (!tp_features.wan)
1373                 return -ENODEV;
1374
1375         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1376                 return -EIO;
1377
1378         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
1379 }
1380
1381 static int wan_set_radiosw(int radio_on)
1382 {
1383         int status;
1384
1385         if (!tp_features.wan)
1386                 return -ENODEV;
1387
1388         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
1389                 return -EIO;
1390         if (radio_on)
1391                 status |= TP_ACPI_WANCARD_RADIOSSW;
1392         else
1393                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
1394         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
1395                 return -EIO;
1396
1397         return 0;
1398 }
1399
1400 /* procfs -------------------------------------------------------------- */
1401 static int wan_read(char *p)
1402 {
1403         int len = 0;
1404         int status = wan_get_radiosw();
1405
1406         if (!tp_features.wan)
1407                 len += sprintf(p + len, "status:\t\tnot supported\n");
1408         else {
1409                 len += sprintf(p + len, "status:\t\t%s\n",
1410                                 (status)? "enabled" : "disabled");
1411                 len += sprintf(p + len, "commands:\tenable, disable\n");
1412         }
1413
1414         return len;
1415 }
1416
1417 static int wan_write(char *buf)
1418 {
1419         char *cmd;
1420
1421         if (!tp_features.wan)
1422                 return -ENODEV;
1423
1424         while ((cmd = next_cmd(&buf))) {
1425                 if (strlencmp(cmd, "enable") == 0) {
1426                         wan_set_radiosw(1);
1427                 } else if (strlencmp(cmd, "disable") == 0) {
1428                         wan_set_radiosw(0);
1429                 } else
1430                         return -EINVAL;
1431         }
1432
1433         return 0;
1434 }
1435
1436 static struct ibm_struct wan_driver_data = {
1437         .name = "wan",
1438         .read = wan_read,
1439         .write = wan_write,
1440         .exit = wan_exit,
1441         .flags.experimental = 1,
1442 };
1443
1444 /*************************************************************************
1445  * Video subdriver
1446  */
1447
1448 static enum video_access_mode video_supported;
1449 static int video_orig_autosw;
1450
1451 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
1452            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
1453            "\\_SB.PCI0.VID0",   /* 770e */
1454            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
1455            "\\_SB.PCI0.AGP.VID",        /* all others */
1456            );                           /* R30, R31 */
1457
1458 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
1459
1460 static int __init video_init(struct ibm_init_struct *iibm)
1461 {
1462         int ivga;
1463
1464         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
1465
1466         IBM_ACPIHANDLE_INIT(vid);
1467         IBM_ACPIHANDLE_INIT(vid2);
1468
1469         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
1470                 /* G41, assume IVGA doesn't change */
1471                 vid_handle = vid2_handle;
1472
1473         if (!vid_handle)
1474                 /* video switching not supported on R30, R31 */
1475                 video_supported = TPACPI_VIDEO_NONE;
1476         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
1477                 /* 570 */
1478                 video_supported = TPACPI_VIDEO_570;
1479         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
1480                 /* 600e/x, 770e, 770x */
1481                 video_supported = TPACPI_VIDEO_770;
1482         else
1483                 /* all others */
1484                 video_supported = TPACPI_VIDEO_NEW;
1485
1486         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
1487                 str_supported(video_supported != TPACPI_VIDEO_NONE),
1488                 video_supported);
1489
1490         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
1491 }
1492
1493 static void video_exit(void)
1494 {
1495         dbg_printk(TPACPI_DBG_EXIT,
1496                    "restoring original video autoswitch mode\n");
1497         if (video_autosw_set(video_orig_autosw))
1498                 printk(IBM_ERR "error while trying to restore original "
1499                         "video autoswitch mode\n");
1500 }
1501
1502 static int video_outputsw_get(void)
1503 {
1504         int status = 0;
1505         int i;
1506
1507         switch (video_supported) {
1508         case TPACPI_VIDEO_570:
1509                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
1510                                  TP_ACPI_VIDEO_570_PHSCMD))
1511                         return -EIO;
1512                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
1513                 break;
1514         case TPACPI_VIDEO_770:
1515                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
1516                         return -EIO;
1517                 if (i)
1518                         status |= TP_ACPI_VIDEO_S_LCD;
1519                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
1520                         return -EIO;
1521                 if (i)
1522                         status |= TP_ACPI_VIDEO_S_CRT;
1523                 break;
1524         case TPACPI_VIDEO_NEW:
1525                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
1526                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
1527                         return -EIO;
1528                 if (i)
1529                         status |= TP_ACPI_VIDEO_S_CRT;
1530
1531                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
1532                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
1533                         return -EIO;
1534                 if (i)
1535                         status |= TP_ACPI_VIDEO_S_LCD;
1536                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
1537                         return -EIO;
1538                 if (i)
1539                         status |= TP_ACPI_VIDEO_S_DVI;
1540                 break;
1541         default:
1542                 return -ENOSYS;
1543         }
1544
1545         return status;
1546 }
1547
1548 static int video_outputsw_set(int status)
1549 {
1550         int autosw;
1551         int res = 0;
1552
1553         switch (video_supported) {
1554         case TPACPI_VIDEO_570:
1555                 res = acpi_evalf(NULL, NULL,
1556                                  "\\_SB.PHS2", "vdd",
1557                                  TP_ACPI_VIDEO_570_PHS2CMD,
1558                                  status | TP_ACPI_VIDEO_570_PHS2SET);
1559                 break;
1560         case TPACPI_VIDEO_770:
1561                 autosw = video_autosw_get();
1562                 if (autosw < 0)
1563                         return autosw;
1564
1565                 res = video_autosw_set(1);
1566                 if (res)
1567                         return res;
1568                 res = acpi_evalf(vid_handle, NULL,
1569                                  "ASWT", "vdd", status * 0x100, 0);
1570                 if (!autosw && video_autosw_set(autosw)) {
1571                         printk(IBM_ERR "video auto-switch left enabled due to error\n");
1572                         return -EIO;
1573                 }
1574                 break;
1575         case TPACPI_VIDEO_NEW:
1576                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
1577                         acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
1578                 break;
1579         default:
1580                 return -ENOSYS;
1581         }
1582
1583         return (res)? 0 : -EIO;
1584 }
1585
1586 static int video_autosw_get(void)
1587 {
1588         int autosw = 0;
1589
1590         switch (video_supported) {
1591         case TPACPI_VIDEO_570:
1592                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
1593                         return -EIO;
1594                 break;
1595         case TPACPI_VIDEO_770:
1596         case TPACPI_VIDEO_NEW:
1597                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
1598                         return -EIO;
1599                 break;
1600         default:
1601                 return -ENOSYS;
1602         }
1603
1604         return autosw & 1;
1605 }
1606
1607 static int video_autosw_set(int enable)
1608 {
1609         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
1610                 return -EIO;
1611         return 0;
1612 }
1613
1614 static int video_outputsw_cycle(void)
1615 {
1616         int autosw = video_autosw_get();
1617         int res;
1618
1619         if (autosw < 0)
1620                 return autosw;
1621
1622         switch (video_supported) {
1623         case TPACPI_VIDEO_570:
1624                 res = video_autosw_set(1);
1625                 if (res)
1626                         return res;
1627                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
1628                 break;
1629         case TPACPI_VIDEO_770:
1630         case TPACPI_VIDEO_NEW:
1631                 res = video_autosw_set(1);
1632                 if (res)
1633                         return res;
1634                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
1635                 break;
1636         default:
1637                 return -ENOSYS;
1638         }
1639         if (!autosw && video_autosw_set(autosw)) {
1640                 printk(IBM_ERR "video auto-switch left enabled due to error\n");
1641                 return -EIO;
1642         }
1643
1644         return (res)? 0 : -EIO;
1645 }
1646
1647 static int video_expand_toggle(void)
1648 {
1649         switch (video_supported) {
1650         case TPACPI_VIDEO_570:
1651                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
1652                         0 : -EIO;
1653         case TPACPI_VIDEO_770:
1654                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
1655                         0 : -EIO;
1656         case TPACPI_VIDEO_NEW:
1657                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
1658                         0 : -EIO;
1659         default:
1660                 return -ENOSYS;
1661         }
1662         /* not reached */
1663 }
1664
1665 static int video_read(char *p)
1666 {
1667         int status, autosw;
1668         int len = 0;
1669
1670         if (video_supported == TPACPI_VIDEO_NONE) {
1671                 len += sprintf(p + len, "status:\t\tnot supported\n");
1672                 return len;
1673         }
1674
1675         status = video_outputsw_get();
1676         if (status < 0)
1677                 return status;
1678
1679         autosw = video_autosw_get();
1680         if (autosw < 0)
1681                 return autosw;
1682
1683         len += sprintf(p + len, "status:\t\tsupported\n");
1684         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
1685         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
1686         if (video_supported == TPACPI_VIDEO_NEW)
1687                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
1688         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
1689         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
1690         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
1691         if (video_supported == TPACPI_VIDEO_NEW)
1692                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
1693         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
1694         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
1695
1696         return len;
1697 }
1698
1699 static int video_write(char *buf)
1700 {
1701         char *cmd;
1702         int enable, disable, status;
1703         int res;
1704
1705         if (video_supported == TPACPI_VIDEO_NONE)
1706                 return -ENODEV;
1707
1708         enable = 0;
1709         disable = 0;
1710
1711         while ((cmd = next_cmd(&buf))) {
1712                 if (strlencmp(cmd, "lcd_enable") == 0) {
1713                         enable |= TP_ACPI_VIDEO_S_LCD;
1714                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
1715                         disable |= TP_ACPI_VIDEO_S_LCD;
1716                 } else if (strlencmp(cmd, "crt_enable") == 0) {
1717                         enable |= TP_ACPI_VIDEO_S_CRT;
1718                 } else if (strlencmp(cmd, "crt_disable") == 0) {
1719                         disable |= TP_ACPI_VIDEO_S_CRT;
1720                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1721                            strlencmp(cmd, "dvi_enable") == 0) {
1722                         enable |= TP_ACPI_VIDEO_S_DVI;
1723                 } else if (video_supported == TPACPI_VIDEO_NEW &&
1724                            strlencmp(cmd, "dvi_disable") == 0) {
1725                         disable |= TP_ACPI_VIDEO_S_DVI;
1726                 } else if (strlencmp(cmd, "auto_enable") == 0) {
1727                         res = video_autosw_set(1);
1728                         if (res)
1729                                 return res;
1730                 } else if (strlencmp(cmd, "auto_disable") == 0) {
1731                         res = video_autosw_set(0);
1732                         if (res)
1733                                 return res;
1734                 } else if (strlencmp(cmd, "video_switch") == 0) {
1735                         res = video_outputsw_cycle();
1736                         if (res)
1737                                 return res;
1738                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
1739                         res = video_expand_toggle();
1740                         if (res)
1741                                 return res;
1742                 } else
1743                         return -EINVAL;
1744         }
1745
1746         if (enable || disable) {
1747                 status = video_outputsw_get();
1748                 if (status < 0)
1749                         return status;
1750                 res = video_outputsw_set((status & ~disable) | enable);
1751                 if (res)
1752                         return res;
1753         }
1754
1755         return 0;
1756 }
1757
1758 static struct ibm_struct video_driver_data = {
1759         .name = "video",
1760         .read = video_read,
1761         .write = video_write,
1762         .exit = video_exit,
1763 };
1764
1765 /*************************************************************************
1766  * Light (thinklight) subdriver
1767  */
1768
1769 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
1770 IBM_HANDLE(ledb, ec, "LEDB");           /* G4x */
1771
1772 static int __init light_init(struct ibm_init_struct *iibm)
1773 {
1774         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
1775
1776         IBM_ACPIHANDLE_INIT(ledb);
1777         IBM_ACPIHANDLE_INIT(lght);
1778         IBM_ACPIHANDLE_INIT(cmos);
1779
1780         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
1781         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
1782
1783         if (tp_features.light)
1784                 /* light status not supported on
1785                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
1786                 tp_features.light_status =
1787                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
1788
1789         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
1790                 str_supported(tp_features.light));
1791
1792         return (tp_features.light)? 0 : 1;
1793 }
1794
1795 static int light_read(char *p)
1796 {
1797         int len = 0;
1798         int status = 0;
1799
1800         if (!tp_features.light) {
1801                 len += sprintf(p + len, "status:\t\tnot supported\n");
1802         } else if (!tp_features.light_status) {
1803                 len += sprintf(p + len, "status:\t\tunknown\n");
1804                 len += sprintf(p + len, "commands:\ton, off\n");
1805         } else {
1806                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
1807                         return -EIO;
1808                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
1809                 len += sprintf(p + len, "commands:\ton, off\n");
1810         }
1811
1812         return len;
1813 }
1814
1815 static int light_write(char *buf)
1816 {
1817         int cmos_cmd, lght_cmd;
1818         char *cmd;
1819         int success;
1820
1821         if (!tp_features.light)
1822                 return -ENODEV;
1823
1824         while ((cmd = next_cmd(&buf))) {
1825                 if (strlencmp(cmd, "on") == 0) {
1826                         cmos_cmd = 0x0c;
1827                         lght_cmd = 1;
1828                 } else if (strlencmp(cmd, "off") == 0) {
1829                         cmos_cmd = 0x0d;
1830                         lght_cmd = 0;
1831                 } else
1832                         return -EINVAL;
1833
1834                 success = cmos_handle ?
1835                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
1836                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
1837                 if (!success)
1838                         return -EIO;
1839         }
1840
1841         return 0;
1842 }
1843
1844 static struct ibm_struct light_driver_data = {
1845         .name = "light",
1846         .read = light_read,
1847         .write = light_write,
1848 };
1849
1850 /*************************************************************************
1851  * Dock subdriver
1852  */
1853
1854 #ifdef CONFIG_THINKPAD_ACPI_DOCK
1855
1856 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
1857            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
1858            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
1859            "\\_SB.PCI.ISA.SLCE",        /* 570 */
1860     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
1861
1862 /* don't list other alternatives as we install a notify handler on the 570 */
1863 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
1864
1865 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
1866         {
1867          .notify = dock_notify,
1868          .handle = &dock_handle,
1869          .type = ACPI_SYSTEM_NOTIFY,
1870         },
1871         {
1872          .hid = IBM_PCI_HID,
1873          .notify = dock_notify,
1874          .handle = &pci_handle,
1875          .type = ACPI_SYSTEM_NOTIFY,
1876         },
1877 };
1878
1879 static struct ibm_struct dock_driver_data[2] = {
1880         {
1881          .name = "dock",
1882          .read = dock_read,
1883          .write = dock_write,
1884          .acpi = &ibm_dock_acpidriver[0],
1885         },
1886         {
1887          .name = "dock",
1888          .acpi = &ibm_dock_acpidriver[1],
1889         },
1890 };
1891
1892 #define dock_docked() (_sta(dock_handle) & 1)
1893
1894 static int __init dock_init(struct ibm_init_struct *iibm)
1895 {
1896         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
1897
1898         IBM_ACPIHANDLE_INIT(dock);
1899
1900         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
1901                 str_supported(dock_handle != NULL));
1902
1903         return (dock_handle)? 0 : 1;
1904 }
1905
1906 static int __init dock_init2(struct ibm_init_struct *iibm)
1907 {
1908         int dock2_needed;
1909
1910         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
1911
1912         if (dock_driver_data[0].flags.acpi_driver_registered &&
1913             dock_driver_data[0].flags.acpi_notify_installed) {
1914                 IBM_ACPIHANDLE_INIT(pci);
1915                 dock2_needed = (pci_handle != NULL);
1916                 vdbg_printk(TPACPI_DBG_INIT,
1917                             "dock PCI handler for the TP 570 is %s\n",
1918                             str_supported(dock2_needed));
1919         } else {
1920                 vdbg_printk(TPACPI_DBG_INIT,
1921                 "dock subdriver part 2 not required\n");
1922                 dock2_needed = 0;
1923         }
1924
1925         return (dock2_needed)? 0 : 1;
1926 }
1927
1928 static void dock_notify(struct ibm_struct *ibm, u32 event)
1929 {
1930         int docked = dock_docked();
1931         int pci = ibm->acpi->hid && strstr(ibm->acpi->hid, IBM_PCI_HID);
1932
1933         if (event == 1 && !pci) /* 570 */
1934                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1935         else if (event == 1 && pci)     /* 570 */
1936                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1937         else if (event == 3 && docked)
1938                 acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
1939         else if (event == 3 && !docked)
1940                 acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
1941         else if (event == 0 && docked)
1942                 acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
1943         else {
1944                 printk(IBM_ERR "unknown dock event %d, status %d\n",
1945                        event, _sta(dock_handle));
1946                 acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
1947         }
1948 }
1949
1950 static int dock_read(char *p)
1951 {
1952         int len = 0;
1953         int docked = dock_docked();
1954
1955         if (!dock_handle)
1956                 len += sprintf(p + len, "status:\t\tnot supported\n");
1957         else if (!docked)
1958                 len += sprintf(p + len, "status:\t\tundocked\n");
1959         else {
1960                 len += sprintf(p + len, "status:\t\tdocked\n");
1961                 len += sprintf(p + len, "commands:\tdock, undock\n");
1962         }
1963
1964         return len;
1965 }
1966
1967 static int dock_write(char *buf)
1968 {
1969         char *cmd;
1970
1971         if (!dock_docked())
1972                 return -ENODEV;
1973
1974         while ((cmd = next_cmd(&buf))) {
1975                 if (strlencmp(cmd, "undock") == 0) {
1976                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
1977                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
1978                                 return -EIO;
1979                 } else if (strlencmp(cmd, "dock") == 0) {
1980                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
1981                                 return -EIO;
1982                 } else
1983                         return -EINVAL;
1984         }
1985
1986         return 0;
1987 }
1988
1989 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
1990
1991 /*************************************************************************
1992  * Bay subdriver
1993  */
1994
1995 #ifdef CONFIG_THINKPAD_ACPI_BAY
1996 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
1997            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
1998            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
1999            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
2000            );                           /* A21e, R30, R31 */
2001 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
2002            "_EJ0",              /* all others */
2003            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
2004 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
2005            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
2006            );                           /* all others */
2007 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
2008            "_EJ0",                      /* 770x */
2009            );                           /* all others */
2010
2011 static int __init bay_init(struct ibm_init_struct *iibm)
2012 {
2013         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
2014
2015         IBM_ACPIHANDLE_INIT(bay);
2016         if (bay_handle)
2017                 IBM_ACPIHANDLE_INIT(bay_ej);
2018         IBM_ACPIHANDLE_INIT(bay2);
2019         if (bay2_handle)
2020                 IBM_ACPIHANDLE_INIT(bay2_ej);
2021
2022         tp_features.bay_status = bay_handle &&
2023                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
2024         tp_features.bay_status2 = bay2_handle &&
2025                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
2026
2027         tp_features.bay_eject = bay_handle && bay_ej_handle &&
2028                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
2029         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
2030                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
2031
2032         vdbg_printk(TPACPI_DBG_INIT,
2033                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
2034                 str_supported(tp_features.bay_status),
2035                 str_supported(tp_features.bay_eject),
2036                 str_supported(tp_features.bay_status2),
2037                 str_supported(tp_features.bay_eject2));
2038
2039         return (tp_features.bay_status || tp_features.bay_eject ||
2040                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
2041 }
2042
2043 static void bay_notify(struct ibm_struct *ibm, u32 event)
2044 {
2045         acpi_bus_generate_event(ibm->acpi->device, event, 0);
2046 }
2047
2048 #define bay_occupied(b) (_sta(b##_handle) & 1)
2049
2050 static int bay_read(char *p)
2051 {
2052         int len = 0;
2053         int occupied = bay_occupied(bay);
2054         int occupied2 = bay_occupied(bay2);
2055         int eject, eject2;
2056
2057         len += sprintf(p + len, "status:\t\t%s\n",
2058                 tp_features.bay_status ?
2059                         (occupied ? "occupied" : "unoccupied") :
2060                                 "not supported");
2061         if (tp_features.bay_status2)
2062                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
2063                                "occupied" : "unoccupied");
2064
2065         eject = tp_features.bay_eject && occupied;
2066         eject2 = tp_features.bay_eject2 && occupied2;
2067
2068         if (eject && eject2)
2069                 len += sprintf(p + len, "commands:\teject, eject2\n");
2070         else if (eject)
2071                 len += sprintf(p + len, "commands:\teject\n");
2072         else if (eject2)
2073                 len += sprintf(p + len, "commands:\teject2\n");
2074
2075         return len;
2076 }
2077
2078 static int bay_write(char *buf)
2079 {
2080         char *cmd;
2081
2082         if (!tp_features.bay_eject && !tp_features.bay_eject2)
2083                 return -ENODEV;
2084
2085         while ((cmd = next_cmd(&buf))) {
2086                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
2087                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
2088                                 return -EIO;
2089                 } else if (tp_features.bay_eject2 &&
2090                            strlencmp(cmd, "eject2") == 0) {
2091                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
2092                                 return -EIO;
2093                 } else
2094                         return -EINVAL;
2095         }
2096
2097         return 0;
2098 }
2099
2100 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
2101         .notify = bay_notify,
2102         .handle = &bay_handle,
2103         .type = ACPI_SYSTEM_NOTIFY,
2104 };
2105
2106 static struct ibm_struct bay_driver_data = {
2107         .name = "bay",
2108         .read = bay_read,
2109         .write = bay_write,
2110         .acpi = &ibm_bay_acpidriver,
2111 };
2112
2113 #endif /* CONFIG_THINKPAD_ACPI_BAY */
2114
2115 /*************************************************************************
2116  * CMOS subdriver
2117  */
2118
2119 /* sysfs cmos_command -------------------------------------------------- */
2120 static ssize_t cmos_command_store(struct device *dev,
2121                             struct device_attribute *attr,
2122                             const char *buf, size_t count)
2123 {
2124         unsigned long cmos_cmd;
2125         int res;
2126
2127         if (parse_strtoul(buf, 21, &cmos_cmd))
2128                 return -EINVAL;
2129
2130         res = issue_thinkpad_cmos_command(cmos_cmd);
2131         return (res)? res : count;
2132 }
2133
2134 static struct device_attribute dev_attr_cmos_command =
2135         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
2136
2137 /* --------------------------------------------------------------------- */
2138
2139 static int __init cmos_init(struct ibm_init_struct *iibm)
2140 {
2141         int res;
2142
2143         vdbg_printk(TPACPI_DBG_INIT,
2144                 "initializing cmos commands subdriver\n");
2145
2146         IBM_ACPIHANDLE_INIT(cmos);
2147
2148         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
2149                 str_supported(cmos_handle != NULL));
2150
2151         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2152         if (res)
2153                 return res;
2154
2155         return (cmos_handle)? 0 : 1;
2156 }
2157
2158 static void cmos_exit(void)
2159 {
2160         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
2161 }
2162
2163 static int cmos_read(char *p)
2164 {
2165         int len = 0;
2166
2167         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2168            R30, R31, T20-22, X20-21 */
2169         if (!cmos_handle)
2170                 len += sprintf(p + len, "status:\t\tnot supported\n");
2171         else {
2172                 len += sprintf(p + len, "status:\t\tsupported\n");
2173                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
2174         }
2175
2176         return len;
2177 }
2178
2179 static int cmos_write(char *buf)
2180 {
2181         char *cmd;
2182         int cmos_cmd, res;
2183
2184         while ((cmd = next_cmd(&buf))) {
2185                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
2186                     cmos_cmd >= 0 && cmos_cmd <= 21) {
2187                         /* cmos_cmd set */
2188                 } else
2189                         return -EINVAL;
2190
2191                 res = issue_thinkpad_cmos_command(cmos_cmd);
2192                 if (res)
2193                         return res;
2194         }
2195
2196         return 0;
2197 }
2198
2199 static struct ibm_struct cmos_driver_data = {
2200         .name = "cmos",
2201         .read = cmos_read,
2202         .write = cmos_write,
2203         .exit = cmos_exit,
2204 };
2205
2206 /*************************************************************************
2207  * LED subdriver
2208  */
2209
2210 static enum led_access_mode led_supported;
2211
2212 IBM_HANDLE(led, ec, "SLED",     /* 570 */
2213            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2214            "LED",               /* all others */
2215            );                   /* R30, R31 */
2216
2217 static int __init led_init(struct ibm_init_struct *iibm)
2218 {
2219         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
2220
2221         IBM_ACPIHANDLE_INIT(led);
2222
2223         if (!led_handle)
2224                 /* led not supported on R30, R31 */
2225                 led_supported = TPACPI_LED_NONE;
2226         else if (strlencmp(led_path, "SLED") == 0)
2227                 /* 570 */
2228                 led_supported = TPACPI_LED_570;
2229         else if (strlencmp(led_path, "SYSL") == 0)
2230                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
2231                 led_supported = TPACPI_LED_OLD;
2232         else
2233                 /* all others */
2234                 led_supported = TPACPI_LED_NEW;
2235
2236         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
2237                 str_supported(led_supported), led_supported);
2238
2239         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
2240 }
2241
2242 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
2243
2244 static int led_read(char *p)
2245 {
2246         int len = 0;
2247
2248         if (!led_supported) {
2249                 len += sprintf(p + len, "status:\t\tnot supported\n");
2250                 return len;
2251         }
2252         len += sprintf(p + len, "status:\t\tsupported\n");
2253
2254         if (led_supported == TPACPI_LED_570) {
2255                 /* 570 */
2256                 int i, status;
2257                 for (i = 0; i < 8; i++) {
2258                         if (!acpi_evalf(ec_handle,
2259                                         &status, "GLED", "dd", 1 << i))
2260                                 return -EIO;
2261                         len += sprintf(p + len, "%d:\t\t%s\n",
2262                                        i, led_status(status));
2263                 }
2264         }
2265
2266         len += sprintf(p + len, "commands:\t"
2267                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
2268
2269         return len;
2270 }
2271
2272 /* off, on, blink */
2273 static const int led_sled_arg1[] = { 0, 1, 3 };
2274 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
2275 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
2276 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
2277
2278 static int led_write(char *buf)
2279 {
2280         char *cmd;
2281         int led, ind, ret;
2282
2283         if (!led_supported)
2284                 return -ENODEV;
2285
2286         while ((cmd = next_cmd(&buf))) {
2287                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
2288                         return -EINVAL;
2289
2290                 if (strstr(cmd, "off")) {
2291                         ind = 0;
2292                 } else if (strstr(cmd, "on")) {
2293                         ind = 1;
2294                 } else if (strstr(cmd, "blink")) {
2295                         ind = 2;
2296                 } else
2297                         return -EINVAL;
2298
2299                 if (led_supported == TPACPI_LED_570) {
2300                         /* 570 */
2301                         led = 1 << led;
2302                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2303                                         led, led_sled_arg1[ind]))
2304                                 return -EIO;
2305                 } else if (led_supported == TPACPI_LED_OLD) {
2306                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
2307                         led = 1 << led;
2308                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
2309                         if (ret >= 0)
2310                                 ret =
2311                                     ec_write(TPACPI_LED_EC_HLBL,
2312                                              led * led_exp_hlbl[ind]);
2313                         if (ret >= 0)
2314                                 ret =
2315                                     ec_write(TPACPI_LED_EC_HLCL,
2316                                              led * led_exp_hlcl[ind]);
2317                         if (ret < 0)
2318                                 return ret;
2319                 } else {
2320                         /* all others */
2321                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
2322                                         led, led_led_arg1[ind]))
2323                                 return -EIO;
2324                 }
2325         }
2326
2327         return 0;
2328 }
2329
2330 static struct ibm_struct led_driver_data = {
2331         .name = "led",
2332         .read = led_read,
2333         .write = led_write,
2334 };
2335
2336 /*************************************************************************
2337  * Beep subdriver
2338  */
2339
2340 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
2341
2342 static int __init beep_init(struct ibm_init_struct *iibm)
2343 {
2344         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
2345
2346         IBM_ACPIHANDLE_INIT(beep);
2347
2348         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
2349                 str_supported(beep_handle != NULL));
2350
2351         return (beep_handle)? 0 : 1;
2352 }
2353
2354 static int beep_read(char *p)
2355 {
2356         int len = 0;
2357
2358         if (!beep_handle)
2359                 len += sprintf(p + len, "status:\t\tnot supported\n");
2360         else {
2361                 len += sprintf(p + len, "status:\t\tsupported\n");
2362                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
2363         }
2364
2365         return len;
2366 }
2367
2368 static int beep_write(char *buf)
2369 {
2370         char *cmd;
2371         int beep_cmd;
2372
2373         if (!beep_handle)
2374                 return -ENODEV;
2375
2376         while ((cmd = next_cmd(&buf))) {
2377                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
2378                     beep_cmd >= 0 && beep_cmd <= 17) {
2379                         /* beep_cmd set */
2380                 } else
2381                         return -EINVAL;
2382                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
2383                         return -EIO;
2384         }
2385
2386         return 0;
2387 }
2388
2389 static struct ibm_struct beep_driver_data = {
2390         .name = "beep",
2391         .read = beep_read,
2392         .write = beep_write,
2393 };
2394
2395 /*************************************************************************
2396  * Thermal subdriver
2397  */
2398
2399 static enum thermal_access_mode thermal_read_mode;
2400
2401 /* sysfs temp##_input -------------------------------------------------- */
2402
2403 static ssize_t thermal_temp_input_show(struct device *dev,
2404                            struct device_attribute *attr,
2405                            char *buf)
2406 {
2407         struct sensor_device_attribute *sensor_attr =
2408                                         to_sensor_dev_attr(attr);
2409         int idx = sensor_attr->index;
2410         s32 value;
2411         int res;
2412
2413         res = thermal_get_sensor(idx, &value);
2414         if (res)
2415                 return res;
2416         if (value == TP_EC_THERMAL_TMP_NA * 1000)
2417                 return -ENXIO;
2418
2419         return snprintf(buf, PAGE_SIZE, "%d\n", value);
2420 }
2421
2422 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
2423          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)
2424
2425 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
2426         THERMAL_SENSOR_ATTR_TEMP(1, 0),
2427         THERMAL_SENSOR_ATTR_TEMP(2, 1),
2428         THERMAL_SENSOR_ATTR_TEMP(3, 2),
2429         THERMAL_SENSOR_ATTR_TEMP(4, 3),
2430         THERMAL_SENSOR_ATTR_TEMP(5, 4),
2431         THERMAL_SENSOR_ATTR_TEMP(6, 5),
2432         THERMAL_SENSOR_ATTR_TEMP(7, 6),
2433         THERMAL_SENSOR_ATTR_TEMP(8, 7),
2434         THERMAL_SENSOR_ATTR_TEMP(9, 8),
2435         THERMAL_SENSOR_ATTR_TEMP(10, 9),
2436         THERMAL_SENSOR_ATTR_TEMP(11, 10),
2437         THERMAL_SENSOR_ATTR_TEMP(12, 11),
2438         THERMAL_SENSOR_ATTR_TEMP(13, 12),
2439         THERMAL_SENSOR_ATTR_TEMP(14, 13),
2440         THERMAL_SENSOR_ATTR_TEMP(15, 14),
2441         THERMAL_SENSOR_ATTR_TEMP(16, 15),
2442 };
2443
2444 #define THERMAL_ATTRS(X) \
2445         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
2446
2447 static struct attribute *thermal_temp_input_attr[] = {
2448         THERMAL_ATTRS(8),
2449         THERMAL_ATTRS(9),
2450         THERMAL_ATTRS(10),
2451         THERMAL_ATTRS(11),
2452         THERMAL_ATTRS(12),
2453         THERMAL_ATTRS(13),
2454         THERMAL_ATTRS(14),
2455         THERMAL_ATTRS(15),
2456         THERMAL_ATTRS(0),
2457         THERMAL_ATTRS(1),
2458         THERMAL_ATTRS(2),
2459         THERMAL_ATTRS(3),
2460         THERMAL_ATTRS(4),
2461         THERMAL_ATTRS(5),
2462         THERMAL_ATTRS(6),
2463         THERMAL_ATTRS(7),
2464         NULL
2465 };
2466
2467 static const struct attribute_group thermal_temp_input16_group = {
2468         .attrs = thermal_temp_input_attr
2469 };
2470
2471 static const struct attribute_group thermal_temp_input8_group = {
2472         .attrs = &thermal_temp_input_attr[8]
2473 };
2474
2475 #undef THERMAL_SENSOR_ATTR_TEMP
2476 #undef THERMAL_ATTRS
2477
2478 /* --------------------------------------------------------------------- */
2479
2480 static int __init thermal_init(struct ibm_init_struct *iibm)
2481 {
2482         u8 t, ta1, ta2;
2483         int i;
2484         int acpi_tmp7;
2485         int res;
2486
2487         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
2488
2489         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
2490
2491         if (ibm_thinkpad_ec_found && experimental) {
2492                 /*
2493                  * Direct EC access mode: sensors at registers
2494                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
2495                  * non-implemented, thermal sensors return 0x80 when
2496                  * not available
2497                  */
2498
2499                 ta1 = ta2 = 0;
2500                 for (i = 0; i < 8; i++) {
2501                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
2502                                 ta1 |= t;
2503                         } else {
2504                                 ta1 = 0;
2505                                 break;
2506                         }
2507                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
2508                                 ta2 |= t;
2509                         } else {
2510                                 ta1 = 0;
2511                                 break;
2512                         }
2513                 }
2514                 if (ta1 == 0) {
2515                         /* This is sheer paranoia, but we handle it anyway */
2516                         if (acpi_tmp7) {
2517                                 printk(IBM_ERR
2518                                        "ThinkPad ACPI EC access misbehaving, "
2519                                        "falling back to ACPI TMPx access mode\n");
2520                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2521                         } else {
2522                                 printk(IBM_ERR
2523                                        "ThinkPad ACPI EC access misbehaving, "
2524                                        "disabling thermal sensors access\n");
2525                                 thermal_read_mode = TPACPI_THERMAL_NONE;
2526                         }
2527                 } else {
2528                         thermal_read_mode =
2529                             (ta2 != 0) ?
2530                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
2531                 }
2532         } else if (acpi_tmp7) {
2533                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
2534                         /* 600e/x, 770e, 770x */
2535                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
2536                 } else {
2537                         /* Standard ACPI TMPx access, max 8 sensors */
2538                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
2539                 }
2540         } else {
2541                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
2542                 thermal_read_mode = TPACPI_THERMAL_NONE;
2543         }
2544
2545         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
2546                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
2547                 thermal_read_mode);
2548
2549         switch(thermal_read_mode) {
2550         case TPACPI_THERMAL_TPEC_16:
2551                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2552                                 &thermal_temp_input16_group);
2553                 if (res)
2554                         return res;
2555                 break;
2556         case TPACPI_THERMAL_TPEC_8:
2557         case TPACPI_THERMAL_ACPI_TMP07:
2558         case TPACPI_THERMAL_ACPI_UPDT:
2559                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2560                                 &thermal_temp_input8_group);
2561                 if (res)
2562                         return res;
2563                 break;
2564         case TPACPI_THERMAL_NONE:
2565         default:
2566                 return 1;
2567         }
2568
2569         return 0;
2570 }
2571
2572 static void thermal_exit(void)
2573 {
2574         switch(thermal_read_mode) {
2575         case TPACPI_THERMAL_TPEC_16:
2576                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2577                                    &thermal_temp_input16_group);
2578                 break;
2579         case TPACPI_THERMAL_TPEC_8:
2580         case TPACPI_THERMAL_ACPI_TMP07:
2581         case TPACPI_THERMAL_ACPI_UPDT:
2582                 sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2583                                    &thermal_temp_input16_group);
2584                 break;
2585         case TPACPI_THERMAL_NONE:
2586         default:
2587                 break;
2588         }
2589 }
2590
2591 /* idx is zero-based */
2592 static int thermal_get_sensor(int idx, s32 *value)
2593 {
2594         int t;
2595         s8 tmp;
2596         char tmpi[5];
2597
2598         t = TP_EC_THERMAL_TMP0;
2599
2600         switch (thermal_read_mode) {
2601 #if TPACPI_MAX_THERMAL_SENSORS >= 16
2602         case TPACPI_THERMAL_TPEC_16:
2603                 if (idx >= 8 && idx <= 15) {
2604                         t = TP_EC_THERMAL_TMP8;
2605                         idx -= 8;
2606                 }
2607                 /* fallthrough */
2608 #endif
2609         case TPACPI_THERMAL_TPEC_8:
2610                 if (idx <= 7) {
2611                         if (!acpi_ec_read(t + idx, &tmp))
2612                                 return -EIO;
2613                         *value = tmp * 1000;
2614                         return 0;
2615                 }
2616                 break;
2617
2618         case TPACPI_THERMAL_ACPI_UPDT:
2619                 if (idx <= 7) {
2620                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2621                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
2622                                 return -EIO;
2623                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2624                                 return -EIO;
2625                         *value = (t - 2732) * 100;
2626                         return 0;
2627                 }
2628                 break;
2629
2630         case TPACPI_THERMAL_ACPI_TMP07:
2631                 if (idx <= 7) {
2632                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
2633                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
2634                                 return -EIO;
2635                         *value = t * 1000;
2636                         return 0;
2637                 }
2638                 break;
2639
2640         case TPACPI_THERMAL_NONE:
2641         default:
2642                 return -ENOSYS;
2643         }
2644
2645         return -EINVAL;
2646 }
2647
2648 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
2649 {
2650         int res, i;
2651         int n;
2652
2653         n = 8;
2654         i = 0;
2655
2656         if (!s)
2657                 return -EINVAL;
2658
2659         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
2660                 n = 16;
2661
2662         for(i = 0 ; i < n; i++) {
2663                 res = thermal_get_sensor(i, &s->temp[i]);
2664                 if (res)
2665                         return res;
2666         }
2667
2668         return n;
2669 }
2670
2671 static int thermal_read(char *p)
2672 {
2673         int len = 0;
2674         int n, i;
2675         struct ibm_thermal_sensors_struct t;
2676
2677         n = thermal_get_sensors(&t);
2678         if (unlikely(n < 0))
2679                 return n;
2680
2681         len += sprintf(p + len, "temperatures:\t");
2682
2683         if (n > 0) {
2684                 for (i = 0; i < (n - 1); i++)
2685                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
2686                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
2687         } else
2688                 len += sprintf(p + len, "not supported\n");
2689
2690         return len;
2691 }
2692
2693 static struct ibm_struct thermal_driver_data = {
2694         .name = "thermal",
2695         .read = thermal_read,
2696         .exit = thermal_exit,
2697 };
2698
2699 /*************************************************************************
2700  * EC Dump subdriver
2701  */
2702
2703 static u8 ecdump_regs[256];
2704
2705 static int ecdump_read(char *p)
2706 {
2707         int len = 0;
2708         int i, j;
2709         u8 v;
2710
2711         len += sprintf(p + len, "EC      "
2712                        " +00 +01 +02 +03 +04 +05 +06 +07"
2713                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
2714         for (i = 0; i < 256; i += 16) {
2715                 len += sprintf(p + len, "EC 0x%02x:", i);
2716                 for (j = 0; j < 16; j++) {
2717                         if (!acpi_ec_read(i + j, &v))
2718                                 break;
2719                         if (v != ecdump_regs[i + j])
2720                                 len += sprintf(p + len, " *%02x", v);
2721                         else
2722                                 len += sprintf(p + len, "  %02x", v);
2723                         ecdump_regs[i + j] = v;
2724                 }
2725                 len += sprintf(p + len, "\n");
2726                 if (j != 16)
2727                         break;
2728         }
2729
2730         /* These are way too dangerous to advertise openly... */
2731 #if 0
2732         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
2733                        " (<offset> is 00-ff, <value> is 00-ff)\n");
2734         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
2735                        " (<offset> is 00-ff, <value> is 0-255)\n");
2736 #endif
2737         return len;
2738 }
2739
2740 static int ecdump_write(char *buf)
2741 {
2742         char *cmd;
2743         int i, v;
2744
2745         while ((cmd = next_cmd(&buf))) {
2746                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
2747                         /* i and v set */
2748                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
2749                         /* i and v set */
2750                 } else
2751                         return -EINVAL;
2752                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
2753                         if (!acpi_ec_write(i, v))
2754                                 return -EIO;
2755                 } else
2756                         return -EINVAL;
2757         }
2758
2759         return 0;
2760 }
2761
2762 static struct ibm_struct ecdump_driver_data = {
2763         .name = "ecdump",
2764         .read = ecdump_read,
2765         .write = ecdump_write,
2766         .flags.experimental = 1,
2767 };
2768
2769 /*************************************************************************
2770  * Backlight/brightness subdriver
2771  */
2772
2773 static struct backlight_device *ibm_backlight_device;
2774
2775 static struct backlight_ops ibm_backlight_data = {
2776         .get_brightness = brightness_get,
2777         .update_status  = brightness_update_status,
2778 };
2779
2780 static int __init brightness_init(struct ibm_init_struct *iibm)
2781 {
2782         int b;
2783
2784         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
2785
2786         b = brightness_get(NULL);
2787         if (b < 0)
2788                 return b;
2789
2790         ibm_backlight_device = backlight_device_register(
2791                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
2792                                         &ibm_backlight_data);
2793         if (IS_ERR(ibm_backlight_device)) {
2794                 printk(IBM_ERR "Could not register backlight device\n");
2795                 return PTR_ERR(ibm_backlight_device);
2796         }
2797         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
2798
2799         ibm_backlight_device->props.max_brightness = 7;
2800         ibm_backlight_device->props.brightness = b;
2801         backlight_update_status(ibm_backlight_device);
2802
2803         return 0;
2804 }
2805
2806 static void brightness_exit(void)
2807 {
2808         if (ibm_backlight_device) {
2809                 vdbg_printk(TPACPI_DBG_EXIT,
2810                             "calling backlight_device_unregister()\n");
2811                 backlight_device_unregister(ibm_backlight_device);
2812                 ibm_backlight_device = NULL;
2813         }
2814 }
2815
2816 static int brightness_update_status(struct backlight_device *bd)
2817 {
2818         return brightness_set(
2819                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
2820                  bd->props.power == FB_BLANK_UNBLANK) ?
2821                                 bd->props.brightness : 0);
2822 }
2823
2824 static int brightness_get(struct backlight_device *bd)
2825 {
2826         u8 level;
2827         if (!acpi_ec_read(brightness_offset, &level))
2828                 return -EIO;
2829
2830         level &= 0x7;
2831
2832         return level;
2833 }
2834
2835 static int brightness_set(int value)
2836 {
2837         int cmos_cmd, inc, i;
2838         int current_value = brightness_get(NULL);
2839
2840         value &= 7;
2841
2842         cmos_cmd = value > current_value ? TP_CMOS_BRIGHTNESS_UP : TP_CMOS_BRIGHTNESS_DOWN;
2843         inc = value > current_value ? 1 : -1;
2844         for (i = current_value; i != value; i += inc) {
2845                 if (issue_thinkpad_cmos_command(cmos_cmd))
2846                         return -EIO;
2847                 if (!acpi_ec_write(brightness_offset, i + inc))
2848                         return -EIO;
2849         }
2850
2851         return 0;
2852 }
2853
2854 static int brightness_read(char *p)
2855 {
2856         int len = 0;
2857         int level;
2858
2859         if ((level = brightness_get(NULL)) < 0) {
2860                 len += sprintf(p + len, "level:\t\tunreadable\n");
2861         } else {
2862                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
2863                 len += sprintf(p + len, "commands:\tup, down\n");
2864                 len += sprintf(p + len, "commands:\tlevel <level>"
2865                                " (<level> is 0-7)\n");
2866         }
2867
2868         return len;
2869 }
2870
2871 static int brightness_write(char *buf)
2872 {
2873         int level;
2874         int new_level;
2875         char *cmd;
2876
2877         while ((cmd = next_cmd(&buf))) {
2878                 if ((level = brightness_get(NULL)) < 0)
2879                         return level;
2880                 level &= 7;
2881
2882                 if (strlencmp(cmd, "up") == 0) {
2883                         new_level = level == 7 ? 7 : level + 1;
2884                 } else if (strlencmp(cmd, "down") == 0) {
2885                         new_level = level == 0 ? 0 : level - 1;
2886                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2887                            new_level >= 0 && new_level <= 7) {
2888                         /* new_level set */
2889                 } else
2890                         return -EINVAL;
2891
2892                 brightness_set(new_level);
2893         }
2894
2895         return 0;
2896 }
2897
2898 static struct ibm_struct brightness_driver_data = {
2899         .name = "brightness",
2900         .read = brightness_read,
2901         .write = brightness_write,
2902         .exit = brightness_exit,
2903 };
2904
2905 /*************************************************************************
2906  * Volume subdriver
2907  */
2908
2909 static int volume_read(char *p)
2910 {
2911         int len = 0;
2912         u8 level;
2913
2914         if (!acpi_ec_read(volume_offset, &level)) {
2915                 len += sprintf(p + len, "level:\t\tunreadable\n");
2916         } else {
2917                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
2918                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
2919                 len += sprintf(p + len, "commands:\tup, down, mute\n");
2920                 len += sprintf(p + len, "commands:\tlevel <level>"
2921                                " (<level> is 0-15)\n");
2922         }
2923
2924         return len;
2925 }
2926
2927 static int volume_write(char *buf)
2928 {
2929         int cmos_cmd, inc, i;
2930         u8 level, mute;
2931         int new_level, new_mute;
2932         char *cmd;
2933
2934         while ((cmd = next_cmd(&buf))) {
2935                 if (!acpi_ec_read(volume_offset, &level))
2936                         return -EIO;
2937                 new_mute = mute = level & 0x40;
2938                 new_level = level = level & 0xf;
2939
2940                 if (strlencmp(cmd, "up") == 0) {
2941                         if (mute)
2942                                 new_mute = 0;
2943                         else
2944                                 new_level = level == 15 ? 15 : level + 1;
2945                 } else if (strlencmp(cmd, "down") == 0) {
2946                         if (mute)
2947                                 new_mute = 0;
2948                         else
2949                                 new_level = level == 0 ? 0 : level - 1;
2950                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
2951                            new_level >= 0 && new_level <= 15) {
2952                         /* new_level set */
2953                 } else if (strlencmp(cmd, "mute") == 0) {
2954                         new_mute = 0x40;
2955                 } else
2956                         return -EINVAL;
2957
2958                 if (new_level != level) {       /* mute doesn't change */
2959                         cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
2960                         inc = new_level > level ? 1 : -1;
2961
2962                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
2963                                      !acpi_ec_write(volume_offset, level)))
2964                                 return -EIO;
2965
2966                         for (i = level; i != new_level; i += inc)
2967                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
2968                                     !acpi_ec_write(volume_offset, i + inc))
2969                                         return -EIO;
2970
2971                         if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
2972                                      !acpi_ec_write(volume_offset,
2973                                                     new_level + mute)))
2974                                 return -EIO;
2975                 }
2976
2977                 if (new_mute != mute) { /* level doesn't change */
2978                         cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
2979
2980                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
2981                             !acpi_ec_write(volume_offset, level + new_mute))
2982                                 return -EIO;
2983                 }
2984         }
2985
2986         return 0;
2987 }
2988
2989 static struct ibm_struct volume_driver_data = {
2990         .name = "volume",
2991         .read = volume_read,
2992         .write = volume_write,
2993 };
2994
2995 /*************************************************************************
2996  * Fan subdriver
2997  */
2998
2999 /*
3000  * FAN ACCESS MODES
3001  *
3002  * TPACPI_FAN_RD_ACPI_GFAN:
3003  *      ACPI GFAN method: returns fan level
3004  *
3005  *      see TPACPI_FAN_WR_ACPI_SFAN
3006  *      EC 0x2f (HFSP) not available if GFAN exists
3007  *
3008  * TPACPI_FAN_WR_ACPI_SFAN:
3009  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
3010  *
3011  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
3012  *      it for writing.
3013  *
3014  * TPACPI_FAN_WR_TPEC:
3015  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
3016  *      Supported on almost all ThinkPads
3017  *
3018  *      Fan speed changes of any sort (including those caused by the
3019  *      disengaged mode) are usually done slowly by the firmware as the
3020  *      maximum ammount of fan duty cycle change per second seems to be
3021  *      limited.
3022  *
3023  *      Reading is not available if GFAN exists.
3024  *      Writing is not available if SFAN exists.
3025  *
3026  *      Bits
3027  *       7      automatic mode engaged;
3028  *              (default operation mode of the ThinkPad)
3029  *              fan level is ignored in this mode.
3030  *       6      full speed mode (takes precedence over bit 7);
3031  *              not available on all thinkpads.  May disable
3032  *              the tachometer while the fan controller ramps up
3033  *              the speed (which can take up to a few *minutes*).
3034  *              Speeds up fan to 100% duty-cycle, which is far above
3035  *              the standard RPM levels.  It is not impossible that
3036  *              it could cause hardware damage.
3037  *      5-3     unused in some models.  Extra bits for fan level
3038  *              in others, but still useless as all values above
3039  *              7 map to the same speed as level 7 in these models.
3040  *      2-0     fan level (0..7 usually)
3041  *                      0x00 = stop
3042  *                      0x07 = max (set when temperatures critical)
3043  *              Some ThinkPads may have other levels, see
3044  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
3045  *
3046  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
3047  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
3048  *      does so, its initial value is meaningless (0x07).
3049  *
3050  *      For firmware bugs, refer to:
3051  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3052  *
3053  *      ----
3054  *
3055  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
3056  *      Main fan tachometer reading (in RPM)
3057  *
3058  *      This register is present on all ThinkPads with a new-style EC, and
3059  *      it is known not to be present on the A21m/e, and T22, as there is
3060  *      something else in offset 0x84 according to the ACPI DSDT.  Other
3061  *      ThinkPads from this same time period (and earlier) probably lack the
3062  *      tachometer as well.
3063  *
3064  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
3065  *      was never fixed by IBM to report the EC firmware version string
3066  *      probably support the tachometer (like the early X models), so
3067  *      detecting it is quite hard.  We need more data to know for sure.
3068  *
3069  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
3070  *      might result.
3071  *
3072  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
3073  *      mode.
3074  *
3075  *      For firmware bugs, refer to:
3076  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
3077  *
3078  * TPACPI_FAN_WR_ACPI_FANS:
3079  *      ThinkPad X31, X40, X41.  Not available in the X60.
3080  *
3081  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
3082  *      high speed.  ACPI DSDT seems to map these three speeds to levels
3083  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
3084  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
3085  *
3086  *      The speeds are stored on handles
3087  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
3088  *
3089  *      There are three default speed sets, acessible as handles:
3090  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
3091  *
3092  *      ACPI DSDT switches which set is in use depending on various
3093  *      factors.
3094  *
3095  *      TPACPI_FAN_WR_TPEC is also available and should be used to
3096  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
3097  *      but the ACPI tables just mention level 7.
3098  */
3099
3100 static enum fan_status_access_mode fan_status_access_mode;
3101 static enum fan_control_access_mode fan_control_access_mode;
3102 static enum fan_control_commands fan_control_commands;
3103
3104 static u8 fan_control_initial_status;
3105 static u8 fan_control_desired_level;
3106
3107 static void fan_watchdog_fire(struct work_struct *ignored);
3108 static int fan_watchdog_maxinterval;
3109 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
3110
3111 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40, X41 */
3112 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
3113            "\\FSPD",            /* 600e/x, 770e, 770x */
3114            );                   /* all others */
3115 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
3116            "JFNS",              /* 770x-JL */
3117            );                   /* all others */
3118
3119 /*
3120  * SYSFS fan layout: hwmon compatible (device)
3121  *
3122  * pwm*_enable:
3123  *      0: "disengaged" mode
3124  *      1: manual mode
3125  *      2: native EC "auto" mode (recommended, hardware default)
3126  *
3127  * pwm*: set speed in manual mode, ignored otherwise.
3128  *      0 is level 0; 255 is level 7. Intermediate points done with linear
3129  *      interpolation.
3130  *
3131  * fan*_input: tachometer reading, RPM
3132  *
3133  *
3134  * SYSFS fan layout: extensions
3135  *
3136  * fan_watchdog (driver):
3137  *      fan watchdog interval in seconds, 0 disables (default), max 120
3138  */
3139
3140 /* sysfs fan pwm1_enable ----------------------------------------------- */
3141 static ssize_t fan_pwm1_enable_show(struct device *dev,
3142                                     struct device_attribute *attr,
3143                                     char *buf)
3144 {
3145         int res, mode;
3146         u8 status;
3147
3148         res = fan_get_status_safe(&status);
3149         if (res)
3150                 return res;
3151
3152         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3153                 if (status != fan_control_initial_status) {
3154                         tp_features.fan_ctrl_status_undef = 0;
3155                 } else {
3156                         /* Return most likely status. In fact, it
3157                          * might be the only possible status */
3158                         status = TP_EC_FAN_AUTO;
3159                 }
3160         }
3161
3162         if (status & TP_EC_FAN_FULLSPEED) {
3163                 mode = 0;
3164         } else if (status & TP_EC_FAN_AUTO) {
3165                 mode = 2;
3166         } else
3167                 mode = 1;
3168
3169         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
3170 }
3171
3172 static ssize_t fan_pwm1_enable_store(struct device *dev,
3173                                      struct device_attribute *attr,
3174                                      const char *buf, size_t count)
3175 {
3176         unsigned long t;
3177         int res, level;
3178
3179         if (parse_strtoul(buf, 2, &t))
3180                 return -EINVAL;
3181
3182         switch (t) {
3183         case 0:
3184                 level = TP_EC_FAN_FULLSPEED;
3185                 break;
3186         case 1:
3187                 level = TPACPI_FAN_LAST_LEVEL;
3188                 break;
3189         case 2:
3190                 level = TP_EC_FAN_AUTO;
3191                 break;
3192         case 3:
3193                 /* reserved for software-controlled auto mode */
3194                 return -ENOSYS;
3195         default:
3196                 return -EINVAL;
3197         }
3198
3199         res = fan_set_level_safe(level);
3200         if (res == -ENXIO)
3201                 return -EINVAL;
3202         else if (res < 0)
3203                 return res;
3204
3205         fan_watchdog_reset();
3206
3207         return count;
3208 }
3209
3210 static struct device_attribute dev_attr_fan_pwm1_enable =
3211         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
3212                 fan_pwm1_enable_show, fan_pwm1_enable_store);
3213
3214 /* sysfs fan pwm1 ------------------------------------------------------ */
3215 static ssize_t fan_pwm1_show(struct device *dev,
3216                              struct device_attribute *attr,
3217                              char *buf)
3218 {
3219         int res;
3220         u8 status;
3221
3222         res = fan_get_status_safe(&status);
3223         if (res)
3224                 return res;
3225
3226         if (unlikely(tp_features.fan_ctrl_status_undef)) {
3227                 if (status != fan_control_initial_status) {
3228                         tp_features.fan_ctrl_status_undef = 0;
3229                 } else {
3230                         status = TP_EC_FAN_AUTO;
3231                 }
3232         }
3233
3234         if ((status &
3235              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
3236                 status = fan_control_desired_level;
3237
3238         if (status > 7)
3239                 status = 7;
3240
3241         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
3242 }
3243
3244 static ssize_t fan_pwm1_store(struct device *dev,
3245                               struct device_attribute *attr,
3246                               const char *buf, size_t count)
3247 {
3248         unsigned long s;
3249         int rc;
3250         u8 status, newlevel;
3251
3252         if (parse_strtoul(buf, 255, &s))
3253                 return -EINVAL;
3254
3255         /* scale down from 0-255 to 0-7 */
3256         newlevel = (s >> 5) & 0x07;
3257
3258         rc = mutex_lock_interruptible(&fan_mutex);
3259         if (rc < 0)
3260                 return rc;
3261
3262         rc = fan_get_status(&status);
3263         if (!rc && (status &
3264                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3265                 rc = fan_set_level(newlevel);
3266                 if (rc == -ENXIO)
3267                         rc = -EINVAL;
3268                 else if (!rc) {
3269                         fan_update_desired_level(newlevel);
3270                         fan_watchdog_reset();
3271                 }
3272         }
3273
3274         mutex_unlock(&fan_mutex);
3275         return (rc)? rc : count;
3276 }
3277
3278 static struct device_attribute dev_attr_fan_pwm1 =
3279         __ATTR(pwm1, S_IWUSR | S_IRUGO,
3280                 fan_pwm1_show, fan_pwm1_store);
3281
3282 /* sysfs fan fan1_input ------------------------------------------------ */
3283 static ssize_t fan_fan1_input_show(struct device *dev,
3284                            struct device_attribute *attr,
3285                            char *buf)
3286 {
3287         int res;
3288         unsigned int speed;
3289
3290         res = fan_get_speed(&speed);
3291         if (res < 0)
3292                 return res;
3293
3294         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
3295 }
3296
3297 static struct device_attribute dev_attr_fan_fan1_input =
3298         __ATTR(fan1_input, S_IRUGO,
3299                 fan_fan1_input_show, NULL);
3300
3301 /* sysfs fan fan_watchdog (driver) ------------------------------------- */
3302 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
3303                                      char *buf)
3304 {
3305         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
3306 }
3307
3308 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
3309                                       const char *buf, size_t count)
3310 {
3311         unsigned long t;
3312
3313         if (parse_strtoul(buf, 120, &t))
3314                 return -EINVAL;
3315
3316         if (!fan_control_allowed)
3317                 return -EPERM;
3318
3319         fan_watchdog_maxinterval = t;
3320         fan_watchdog_reset();
3321
3322         return count;
3323 }
3324
3325 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
3326                 fan_fan_watchdog_show, fan_fan_watchdog_store);
3327
3328 /* --------------------------------------------------------------------- */
3329 static struct attribute *fan_attributes[] = {
3330         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
3331         &dev_attr_fan_fan1_input.attr,
3332         NULL
3333 };
3334
3335 static const struct attribute_group fan_attr_group = {
3336         .attrs = fan_attributes,
3337 };
3338
3339 static int __init fan_init(struct ibm_init_struct *iibm)
3340 {
3341         int rc;
3342
3343         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
3344
3345         mutex_init(&fan_mutex);
3346         fan_status_access_mode = TPACPI_FAN_NONE;
3347         fan_control_access_mode = TPACPI_FAN_WR_NONE;
3348         fan_control_commands = 0;
3349         fan_watchdog_maxinterval = 0;
3350         tp_features.fan_ctrl_status_undef = 0;
3351         fan_control_desired_level = 7;
3352
3353         IBM_ACPIHANDLE_INIT(fans);
3354         IBM_ACPIHANDLE_INIT(gfan);
3355         IBM_ACPIHANDLE_INIT(sfan);
3356
3357         if (gfan_handle) {
3358                 /* 570, 600e/x, 770e, 770x */
3359                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
3360         } else {
3361                 /* all other ThinkPads: note that even old-style
3362                  * ThinkPad ECs supports the fan control register */
3363                 if (likely(acpi_ec_read(fan_status_offset,
3364                                         &fan_control_initial_status))) {
3365                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
3366
3367                         /* In some ThinkPads, neither the EC nor the ACPI
3368                          * DSDT initialize the fan status, and it ends up
3369                          * being set to 0x07 when it *could* be either
3370                          * 0x07 or 0x80.
3371                          *
3372                          * Enable for TP-1Y (T43), TP-78 (R51e),
3373                          * TP-76 (R52), TP-70 (T43, R52), which are known
3374                          * to be buggy. */
3375                         if (fan_control_initial_status == 0x07 &&
3376                             ibm_thinkpad_ec_found &&
3377                             ((ibm_thinkpad_ec_found[0] == '1' &&
3378                               ibm_thinkpad_ec_found[1] == 'Y') ||
3379                              (ibm_thinkpad_ec_found[0] == '7' &&
3380                               (ibm_thinkpad_ec_found[1] == '6' ||
3381                                ibm_thinkpad_ec_found[1] == '8' ||
3382                                ibm_thinkpad_ec_found[1] == '0'))
3383                             )) {
3384                                 printk(IBM_NOTICE
3385                                        "fan_init: initial fan status is "
3386                                        "unknown, assuming it is in auto "
3387                                        "mode\n");
3388                                 tp_features.fan_ctrl_status_undef = 1;
3389                         }
3390                 } else {
3391                         printk(IBM_ERR
3392                                "ThinkPad ACPI EC access misbehaving, "
3393                                "fan status and control unavailable\n");
3394                         return 1;
3395                 }
3396         }
3397
3398         if (sfan_handle) {
3399                 /* 570, 770x-JL */
3400                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
3401                 fan_control_commands |=
3402                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
3403         } else {
3404                 if (!gfan_handle) {
3405                         /* gfan without sfan means no fan control */
3406                         /* all other models implement TP EC 0x2f control */
3407
3408                         if (fans_handle) {
3409                                 /* X31, X40, X41 */
3410                                 fan_control_access_mode =
3411                                     TPACPI_FAN_WR_ACPI_FANS;
3412                                 fan_control_commands |=
3413                                     TPACPI_FAN_CMD_SPEED |
3414                                     TPACPI_FAN_CMD_LEVEL |
3415                                     TPACPI_FAN_CMD_ENABLE;
3416                         } else {
3417                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
3418                                 fan_control_commands |=
3419                                     TPACPI_FAN_CMD_LEVEL |
3420                                     TPACPI_FAN_CMD_ENABLE;
3421                         }
3422                 }
3423         }
3424
3425         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
3426                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
3427                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
3428                 fan_status_access_mode, fan_control_access_mode);
3429
3430         /* fan control master switch */
3431         if (!fan_control_allowed) {
3432                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
3433                 fan_control_commands = 0;
3434                 dbg_printk(TPACPI_DBG_INIT,
3435                            "fan control features disabled by parameter\n");
3436         }
3437
3438         /* update fan_control_desired_level */
3439         if (fan_status_access_mode != TPACPI_FAN_NONE)
3440                 fan_get_status_safe(NULL);
3441
3442         if (fan_status_access_mode != TPACPI_FAN_NONE ||
3443             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
3444                 rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3445                                          &fan_attr_group);
3446                 if (!(rc < 0))
3447                         rc = driver_create_file(&tpacpi_pdriver.driver,
3448                                         &driver_attr_fan_watchdog);
3449                 if (rc < 0)
3450                         return rc;
3451                 return 0;
3452         } else
3453                 return 1;
3454 }
3455
3456 /*
3457  * Call with fan_mutex held
3458  */
3459 static void fan_update_desired_level(u8 status)
3460 {
3461         if ((status &
3462              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
3463                 if (status > 7)
3464                         fan_control_desired_level = 7;
3465                 else
3466                         fan_control_desired_level = status;
3467         }
3468 }
3469
3470 static int fan_get_status(u8 *status)
3471 {
3472         u8 s;
3473
3474         /* TODO:
3475          * Add TPACPI_FAN_RD_ACPI_FANS ? */
3476
3477         switch (fan_status_access_mode) {
3478         case TPACPI_FAN_RD_ACPI_GFAN:
3479                 /* 570, 600e/x, 770e, 770x */
3480
3481                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
3482                         return -EIO;
3483
3484                 if (likely(status))
3485                         *status = s & 0x07;
3486
3487                 break;
3488
3489         case TPACPI_FAN_RD_TPEC:
3490                 /* all except 570, 600e/x, 770e, 770x */
3491                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
3492                         return -EIO;
3493
3494                 if (likely(status))
3495                         *status = s;
3496
3497                 break;
3498
3499         default:
3500                 return -ENXIO;
3501         }
3502
3503         return 0;
3504 }
3505
3506 static int fan_get_status_safe(u8 *status)
3507 {
3508         int rc;
3509         u8 s;
3510
3511         rc = mutex_lock_interruptible(&fan_mutex);
3512         if (rc < 0)
3513                 return rc;
3514         rc = fan_get_status(&s);
3515         if (!rc)
3516                 fan_update_desired_level(s);
3517         mutex_unlock(&fan_mutex);
3518
3519         if (status)
3520                 *status = s;
3521
3522         return rc;
3523 }
3524
3525 static void fan_exit(void)
3526 {
3527         vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
3528
3529         /* FIXME: can we really do this unconditionally? */
3530         sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
3531         driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
3532
3533         cancel_delayed_work(&fan_watchdog_task);
3534         flush_scheduled_work();
3535 }
3536
3537 static int fan_get_speed(unsigned int *speed)
3538 {
3539         u8 hi, lo;
3540
3541         switch (fan_status_access_mode) {
3542         case TPACPI_FAN_RD_TPEC:
3543                 /* all except 570, 600e/x, 770e, 770x */
3544                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
3545                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
3546                         return -EIO;
3547
3548                 if (likely(speed))
3549                         *speed = (hi << 8) | lo;
3550
3551                 break;
3552
3553         default:
3554                 return -ENXIO;
3555         }
3556
3557         return 0;
3558 }
3559
3560 static void fan_watchdog_fire(struct work_struct *ignored)
3561 {
3562         int rc;
3563
3564         printk(IBM_NOTICE "fan watchdog: enabling fan\n");
3565         rc = fan_set_enable();
3566         if (rc < 0) {
3567                 printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
3568                         "will try again later...\n", -rc);
3569                 /* reschedule for later */
3570                 fan_watchdog_reset();
3571         }
3572 }
3573
3574 static void fan_watchdog_reset(void)
3575 {
3576         static int fan_watchdog_active;
3577
3578         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
3579                 return;
3580
3581         if (fan_watchdog_active)
3582                 cancel_delayed_work(&fan_watchdog_task);
3583
3584         if (fan_watchdog_maxinterval > 0) {
3585                 fan_watchdog_active = 1;
3586                 if (!schedule_delayed_work(&fan_watchdog_task,
3587                                 msecs_to_jiffies(fan_watchdog_maxinterval
3588                                                  * 1000))) {
3589                         printk(IBM_ERR "failed to schedule the fan watchdog, "
3590                                "watchdog will not trigger\n");
3591                 }
3592         } else
3593                 fan_watchdog_active = 0;
3594 }
3595
3596 static int fan_set_level(int level)
3597 {
3598         if (!fan_control_allowed)
3599                 return -EPERM;
3600
3601         switch (fan_control_access_mode) {
3602         case TPACPI_FAN_WR_ACPI_SFAN:
3603                 if (level >= 0 && level <= 7) {
3604                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
3605                                 return -EIO;
3606                 } else
3607                         return -EINVAL;
3608                 break;
3609
3610         case TPACPI_FAN_WR_ACPI_FANS:
3611         case TPACPI_FAN_WR_TPEC:
3612                 if ((level != TP_EC_FAN_AUTO) &&
3613                     (level != TP_EC_FAN_FULLSPEED) &&
3614                     ((level < 0) || (level > 7)))
3615                         return -EINVAL;
3616
3617                 /* safety net should the EC not support AUTO
3618                  * or FULLSPEED mode bits and just ignore them */
3619                 if (level & TP_EC_FAN_FULLSPEED)
3620                         level |= 7;     /* safety min speed 7 */
3621                 else if (level & TP_EC_FAN_FULLSPEED)
3622                         level |= 4;     /* safety min speed 4 */
3623
3624                 if (!acpi_ec_write(fan_status_offset, level))
3625                         return -EIO;
3626                 else
3627                         tp_features.fan_ctrl_status_undef = 0;
3628                 break;
3629
3630         default:
3631                 return -ENXIO;
3632         }
3633         return 0;
3634 }
3635
3636 static int fan_set_level_safe(int level)
3637 {
3638         int rc;
3639
3640         if (!fan_control_allowed)
3641                 return -EPERM;
3642
3643         rc = mutex_lock_interruptible(&fan_mutex);
3644         if (rc < 0)
3645                 return rc;
3646
3647         if (level == TPACPI_FAN_LAST_LEVEL)
3648                 level = fan_control_desired_level;
3649
3650         rc = fan_set_level(level);
3651         if (!rc)
3652                 fan_update_desired_level(level);
3653
3654         mutex_unlock(&fan_mutex);
3655         return rc;
3656 }
3657
3658 static int fan_set_enable(void)
3659 {
3660         u8 s;
3661         int rc;
3662
3663         if (!fan_control_allowed)
3664                 return -EPERM;
3665
3666         rc = mutex_lock_interruptible(&fan_mutex);
3667         if (rc < 0)
3668                 return rc;
3669
3670         switch (fan_control_access_mode) {
3671         case TPACPI_FAN_WR_ACPI_FANS:
3672         case TPACPI_FAN_WR_TPEC:
3673                 rc = fan_get_status(&s);
3674                 if (rc < 0)
3675                         break;
3676
3677                 /* Don't go out of emergency fan mode */
3678                 if (s != 7) {
3679                         s &= 0x07;
3680                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
3681                 }
3682
3683                 if (!acpi_ec_write(fan_status_offset, s))
3684                         rc = -EIO;
3685                 else {
3686                         tp_features.fan_ctrl_status_undef = 0;
3687                         rc = 0;
3688                 }
3689                 break;
3690
3691         case TPACPI_FAN_WR_ACPI_SFAN:
3692                 rc = fan_get_status(&s);
3693                 if (rc < 0)
3694                         break;
3695
3696                 s &= 0x07;
3697
3698                 /* Set fan to at least level 4 */
3699                 s |= 4;
3700
3701                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
3702                         rc= -EIO;
3703                 else
3704                         rc = 0;
3705                 break;
3706
3707         default:
3708                 rc = -ENXIO;
3709         }
3710
3711         mutex_unlock(&fan_mutex);
3712         return rc;
3713 }
3714
3715 static int fan_set_disable(void)
3716 {
3717         int rc;
3718
3719         if (!fan_control_allowed)
3720                 return -EPERM;
3721
3722         rc = mutex_lock_interruptible(&fan_mutex);
3723         if (rc < 0)
3724                 return rc;
3725
3726         rc = 0;
3727         switch (fan_control_access_mode) {
3728         case TPACPI_FAN_WR_ACPI_FANS:
3729         case TPACPI_FAN_WR_TPEC:
3730                 if (!acpi_ec_write(fan_status_offset, 0x00))
3731                         rc = -EIO;
3732                 else {
3733                         fan_control_desired_level = 0;
3734                         tp_features.fan_ctrl_status_undef = 0;
3735                 }
3736                 break;
3737
3738         case TPACPI_FAN_WR_ACPI_SFAN:
3739                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
3740                         rc = -EIO;
3741                 else
3742                         fan_control_desired_level = 0;
3743                 break;
3744
3745         default:
3746                 rc = -ENXIO;
3747         }
3748
3749
3750         mutex_unlock(&fan_mutex);
3751         return rc;
3752 }
3753
3754 static int fan_set_speed(int speed)
3755 {
3756         int rc;
3757
3758         if (!fan_control_allowed)
3759                 return -EPERM;
3760
3761         rc = mutex_lock_interruptible(&fan_mutex);
3762         if (rc < 0)
3763                 return rc;
3764
3765         rc = 0;
3766         switch (fan_control_access_mode) {
3767         case TPACPI_FAN_WR_ACPI_FANS:
3768                 if (speed >= 0 && speed <= 65535) {
3769                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
3770                                         speed, speed, speed))
3771                                 rc = -EIO;
3772                 } else
3773                         rc = -EINVAL;
3774                 break;
3775
3776         default:
3777                 rc = -ENXIO;
3778         }
3779
3780         mutex_unlock(&fan_mutex);
3781         return rc;
3782 }
3783
3784 static int fan_read(char *p)
3785 {
3786         int len = 0;
3787         int rc;
3788         u8 status;
3789         unsigned int speed = 0;
3790
3791         switch (fan_status_access_mode) {
3792         case TPACPI_FAN_RD_ACPI_GFAN:
3793                 /* 570, 600e/x, 770e, 770x */
3794                 if ((rc = fan_get_status_safe(&status)) < 0)
3795                         return rc;
3796
3797                 len += sprintf(p + len, "status:\t\t%s\n"
3798                                "level:\t\t%d\n",
3799                                (status != 0) ? "enabled" : "disabled", status);
3800                 break;
3801
3802         case TPACPI_FAN_RD_TPEC:
3803                 /* all except 570, 600e/x, 770e, 770x */
3804                 if ((rc = fan_get_status_safe(&status)) < 0)
3805                         return rc;
3806
3807                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
3808                         if (status != fan_control_initial_status)
3809                                 tp_features.fan_ctrl_status_undef = 0;
3810                         else
3811                                 /* Return most likely status. In fact, it
3812                                  * might be the only possible status */
3813                                 status = TP_EC_FAN_AUTO;
3814                 }
3815
3816                 len += sprintf(p + len, "status:\t\t%s\n",
3817                                (status != 0) ? "enabled" : "disabled");
3818
3819                 if ((rc = fan_get_speed(&speed)) < 0)
3820                         return rc;
3821
3822                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
3823
3824                 if (status & TP_EC_FAN_FULLSPEED)
3825                         /* Disengaged mode takes precedence */
3826                         len += sprintf(p + len, "level:\t\tdisengaged\n");
3827                 else if (status & TP_EC_FAN_AUTO)
3828                         len += sprintf(p + len, "level:\t\tauto\n");
3829                 else
3830                         len += sprintf(p + len, "level:\t\t%d\n", status);
3831                 break;
3832
3833         case TPACPI_FAN_NONE:
3834         default:
3835                 len += sprintf(p + len, "status:\t\tnot supported\n");
3836         }
3837
3838         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
3839                 len += sprintf(p + len, "commands:\tlevel <level>");
3840
3841                 switch (fan_control_access_mode) {
3842                 case TPACPI_FAN_WR_ACPI_SFAN:
3843                         len += sprintf(p + len, " (<level> is 0-7)\n");
3844                         break;
3845
3846                 default:
3847                         len += sprintf(p + len, " (<level> is 0-7, "
3848                                        "auto, disengaged, full-speed)\n");
3849                         break;
3850                 }
3851         }
3852
3853         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
3854                 len += sprintf(p + len, "commands:\tenable, disable\n"
3855                                "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
3856                                "1-120 (seconds))\n");
3857
3858         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
3859                 len += sprintf(p + len, "commands:\tspeed <speed>"
3860                                " (<speed> is 0-65535)\n");
3861
3862         return len;
3863 }
3864
3865 static int fan_write_cmd_level(const char *cmd, int *rc)
3866 {
3867         int level;
3868
3869         if (strlencmp(cmd, "level auto") == 0)
3870                 level = TP_EC_FAN_AUTO;
3871         else if ((strlencmp(cmd, "level disengaged") == 0) |
3872                  (strlencmp(cmd, "level full-speed") == 0))
3873                 level = TP_EC_FAN_FULLSPEED;
3874         else if (sscanf(cmd, "level %d", &level) != 1)
3875                 return 0;
3876
3877         if ((*rc = fan_set_level_safe(level)) == -ENXIO)
3878                 printk(IBM_ERR "level command accepted for unsupported "
3879                        "access mode %d", fan_control_access_mode);
3880
3881         return 1;
3882 }
3883
3884 static int fan_write_cmd_enable(const char *cmd, int *rc)
3885 {
3886         if (strlencmp(cmd, "enable") != 0)
3887                 return 0;
3888
3889         if ((*rc = fan_set_enable()) == -ENXIO)
3890                 printk(IBM_ERR "enable command accepted for unsupported "
3891                        "access mode %d", fan_control_access_mode);
3892
3893         return 1;
3894 }
3895
3896 static int fan_write_cmd_disable(const char *cmd, int *rc)
3897 {
3898         if (strlencmp(cmd, "disable") != 0)
3899                 return 0;
3900
3901         if ((*rc = fan_set_disable()) == -ENXIO)
3902                 printk(IBM_ERR "disable command accepted for unsupported "
3903                        "access mode %d", fan_control_access_mode);
3904
3905         return 1;
3906 }
3907
3908 static int fan_write_cmd_speed(const char *cmd, int *rc)
3909 {
3910         int speed;
3911
3912         /* TODO:
3913          * Support speed <low> <medium> <high> ? */
3914
3915         if (sscanf(cmd, "speed %d", &speed) != 1)
3916                 return 0;
3917
3918         if ((*rc = fan_set_speed(speed)) == -ENXIO)
3919                 printk(IBM_ERR "speed command accepted for unsupported "
3920                        "access mode %d", fan_control_access_mode);
3921
3922         return 1;
3923 }
3924
3925 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
3926 {
3927         int interval;
3928
3929         if (sscanf(cmd, "watchdog %d", &interval) != 1)
3930                 return 0;
3931
3932         if (interval < 0 || interval > 120)
3933                 *rc = -EINVAL;
3934         else
3935                 fan_watchdog_maxinterval = interval;
3936
3937         return 1;
3938 }
3939
3940 static int fan_write(char *buf)
3941 {
3942         char *cmd;
3943         int rc = 0;
3944
3945         while (!rc && (cmd = next_cmd(&buf))) {
3946                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
3947                       fan_write_cmd_level(cmd, &rc)) &&
3948                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
3949                       (fan_write_cmd_enable(cmd, &rc) ||
3950                        fan_write_cmd_disable(cmd, &rc) ||
3951                        fan_write_cmd_watchdog(cmd, &rc))) &&
3952                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
3953                       fan_write_cmd_speed(cmd, &rc))
3954                     )
3955                         rc = -EINVAL;
3956                 else if (!rc)
3957                         fan_watchdog_reset();
3958         }
3959
3960         return rc;
3961 }
3962
3963 static struct ibm_struct fan_driver_data = {
3964         .name = "fan",
3965         .read = fan_read,
3966         .write = fan_write,
3967         .exit = fan_exit,
3968 };
3969
3970 /****************************************************************************
3971  ****************************************************************************
3972  *
3973  * Infrastructure
3974  *
3975  ****************************************************************************
3976  ****************************************************************************/
3977
3978 /* /proc support */
3979 static struct proc_dir_entry *proc_dir;
3980
3981 /* Subdriver registry */
3982 static LIST_HEAD(tpacpi_all_drivers);
3983
3984
3985 /*
3986  * Module and infrastructure proble, init and exit handling
3987  */
3988
3989 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
3990 static const char * __init str_supported(int is_supported)
3991 {
3992         static char text_unsupported[] __initdata = "not supported";
3993
3994         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
3995 }
3996 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
3997
3998 static int __init ibm_init(struct ibm_init_struct *iibm)
3999 {
4000         int ret;
4001         struct ibm_struct *ibm = iibm->data;
4002         struct proc_dir_entry *entry;
4003
4004         BUG_ON(ibm == NULL);
4005
4006         INIT_LIST_HEAD(&ibm->all_drivers);
4007
4008         if (ibm->flags.experimental && !experimental)
4009                 return 0;
4010
4011         dbg_printk(TPACPI_DBG_INIT,
4012                 "probing for %s\n", ibm->name);
4013
4014         if (iibm->init) {
4015                 ret = iibm->init(iibm);
4016                 if (ret > 0)
4017                         return 0;       /* probe failed */
4018                 if (ret)
4019                         return ret;
4020
4021                 ibm->flags.init_called = 1;
4022         }
4023
4024         if (ibm->acpi) {
4025                 if (ibm->acpi->hid) {
4026                         ret = register_tpacpi_subdriver(ibm);
4027                         if (ret)
4028                                 goto err_out;
4029                 }
4030
4031                 if (ibm->acpi->notify) {
4032                         ret = setup_acpi_notify(ibm);
4033                         if (ret == -ENODEV) {
4034                                 printk(IBM_NOTICE "disabling subdriver %s\n",
4035                                         ibm->name);
4036                                 ret = 0;
4037                                 goto err_out;
4038                         }
4039                         if (ret < 0)
4040                                 goto err_out;
4041                 }
4042         }
4043
4044         dbg_printk(TPACPI_DBG_INIT,
4045                 "%s installed\n", ibm->name);
4046
4047         if (ibm->read) {
4048                 entry = create_proc_entry(ibm->name,
4049                                           S_IFREG | S_IRUGO | S_IWUSR,
4050                                           proc_dir);
4051                 if (!entry) {
4052                         printk(IBM_ERR "unable to create proc entry %s\n",
4053                                ibm->name);
4054                         ret = -ENODEV;
4055                         goto err_out;
4056                 }
4057                 entry->owner = THIS_MODULE;
4058                 entry->data = ibm;
4059                 entry->read_proc = &dispatch_procfs_read;
4060                 if (ibm->write)
4061                         entry->write_proc = &dispatch_procfs_write;
4062                 ibm->flags.proc_created = 1;
4063         }
4064
4065         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
4066
4067         return 0;
4068
4069 err_out:
4070         dbg_printk(TPACPI_DBG_INIT,
4071                 "%s: at error exit path with result %d\n",
4072                 ibm->name, ret);
4073
4074         ibm_exit(ibm);
4075         return (ret < 0)? ret : 0;
4076 }
4077
4078 static void ibm_exit(struct ibm_struct *ibm)
4079 {
4080         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
4081
4082         list_del_init(&ibm->all_drivers);
4083
4084         if (ibm->flags.acpi_notify_installed) {
4085                 dbg_printk(TPACPI_DBG_EXIT,
4086                         "%s: acpi_remove_notify_handler\n", ibm->name);
4087                 BUG_ON(!ibm->acpi);
4088                 acpi_remove_notify_handler(*ibm->acpi->handle,
4089                                            ibm->acpi->type,
4090                                            dispatch_acpi_notify);
4091                 ibm->flags.acpi_notify_installed = 0;
4092                 ibm->flags.acpi_notify_installed = 0;
4093         }
4094
4095         if (ibm->flags.proc_created) {
4096                 dbg_printk(TPACPI_DBG_EXIT,
4097                         "%s: remove_proc_entry\n", ibm->name);
4098                 remove_proc_entry(ibm->name, proc_dir);
4099                 ibm->flags.proc_created = 0;
4100         }
4101
4102         if (ibm->flags.acpi_driver_registered) {
4103                 dbg_printk(TPACPI_DBG_EXIT,
4104                         "%s: acpi_bus_unregister_driver\n", ibm->name);
4105                 BUG_ON(!ibm->acpi);
4106                 acpi_bus_unregister_driver(ibm->acpi->driver);
4107                 kfree(ibm->acpi->driver);
4108                 ibm->acpi->driver = NULL;
4109                 ibm->flags.acpi_driver_registered = 0;
4110         }
4111
4112         if (ibm->flags.init_called && ibm->exit) {
4113                 ibm->exit();
4114                 ibm->flags.init_called = 0;
4115         }
4116
4117         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
4118 }
4119
4120 /* Probing */
4121
4122 static char *ibm_thinkpad_ec_found;
4123
4124 static char* __init check_dmi_for_ec(void)
4125 {
4126         struct dmi_device *dev = NULL;
4127         char ec_fw_string[18];
4128
4129         /*
4130          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
4131          * X32 or newer, all Z series;  Some models must have an
4132          * up-to-date BIOS or they will not be detected.
4133          *
4134          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
4135          */
4136         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
4137                 if (sscanf(dev->name,
4138                            "IBM ThinkPad Embedded Controller -[%17c",
4139                            ec_fw_string) == 1) {
4140                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
4141                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
4142                         return kstrdup(ec_fw_string, GFP_KERNEL);
4143                 }
4144         }
4145         return NULL;
4146 }
4147
4148 static int __init probe_for_thinkpad(void)
4149 {
4150         int is_thinkpad;
4151
4152         if (acpi_disabled)
4153                 return -ENODEV;
4154
4155         /*
4156          * Non-ancient models have better DMI tagging, but very old models
4157          * don't.
4158          */
4159         is_thinkpad = dmi_name_in_vendors("ThinkPad");
4160
4161         /* ec is required because many other handles are relative to it */
4162         IBM_ACPIHANDLE_INIT(ec);
4163         if (!ec_handle) {
4164                 if (is_thinkpad)
4165                         printk(IBM_ERR
4166                                 "Not yet supported ThinkPad detected!\n");
4167                 return -ENODEV;
4168         }
4169
4170         /*
4171          * Risks a regression on very old machines, but reduces potential
4172          * false positives a damn great deal
4173          */
4174         if (!is_thinkpad)
4175                 is_thinkpad = dmi_name_in_vendors("IBM");
4176
4177         if (!is_thinkpad && !force_load)
4178                 return -ENODEV;
4179
4180         return 0;
4181 }
4182
4183
4184 /* Module init, exit, parameters */
4185
4186 static struct ibm_init_struct ibms_init[] __initdata = {
4187         {
4188                 .init = thinkpad_acpi_driver_init,
4189                 .data = &thinkpad_acpi_driver_data,
4190         },
4191         {
4192                 .init = hotkey_init,
4193                 .data = &hotkey_driver_data,
4194         },
4195         {
4196                 .init = bluetooth_init,
4197                 .data = &bluetooth_driver_data,
4198         },
4199         {
4200                 .init = wan_init,
4201                 .data = &wan_driver_data,
4202         },
4203         {
4204                 .init = video_init,
4205                 .data = &video_driver_data,
4206         },
4207         {
4208                 .init = light_init,
4209                 .data = &light_driver_data,
4210         },
4211 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4212         {
4213                 .init = dock_init,
4214                 .data = &dock_driver_data[0],
4215         },
4216         {
4217                 .init = dock_init2,
4218                 .data = &dock_driver_data[1],
4219         },
4220 #endif
4221 #ifdef CONFIG_THINKPAD_ACPI_BAY
4222         {
4223                 .init = bay_init,
4224                 .data = &bay_driver_data,
4225         },
4226 #endif
4227         {
4228                 .init = cmos_init,
4229                 .data = &cmos_driver_data,
4230         },
4231         {
4232                 .init = led_init,
4233                 .data = &led_driver_data,
4234         },
4235         {
4236                 .init = beep_init,
4237                 .data = &beep_driver_data,
4238         },
4239         {
4240                 .init = thermal_init,
4241                 .data = &thermal_driver_data,
4242         },
4243         {
4244                 .data = &ecdump_driver_data,
4245         },
4246         {
4247                 .init = brightness_init,
4248                 .data = &brightness_driver_data,
4249         },
4250         {
4251                 .data = &volume_driver_data,
4252         },
4253         {
4254                 .init = fan_init,
4255                 .data = &fan_driver_data,
4256         },
4257 };
4258
4259 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
4260 {
4261         unsigned int i;
4262         struct ibm_struct *ibm;
4263
4264         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4265                 ibm = ibms_init[i].data;
4266                 BUG_ON(ibm == NULL);
4267
4268                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
4269                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
4270                                 return -ENOSPC;
4271                         strcpy(ibms_init[i].param, val);
4272                         strcat(ibms_init[i].param, ",");
4273                         return 0;
4274                 }
4275         }
4276
4277         return -EINVAL;
4278 }
4279
4280 static int experimental;
4281 module_param(experimental, int, 0);
4282
4283 static u32 dbg_level;
4284 module_param_named(debug, dbg_level, uint, 0);
4285
4286 static int force_load;
4287 module_param(force_load, int, 0);
4288
4289 static int fan_control_allowed;
4290 module_param_named(fan_control, fan_control_allowed, int, 0);
4291
4292 #define IBM_PARAM(feature) \
4293         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
4294
4295 IBM_PARAM(hotkey);
4296 IBM_PARAM(bluetooth);
4297 IBM_PARAM(video);
4298 IBM_PARAM(light);
4299 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4300 IBM_PARAM(dock);
4301 #endif
4302 #ifdef CONFIG_THINKPAD_ACPI_BAY
4303 IBM_PARAM(bay);
4304 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4305 IBM_PARAM(cmos);
4306 IBM_PARAM(led);
4307 IBM_PARAM(beep);
4308 IBM_PARAM(ecdump);
4309 IBM_PARAM(brightness);
4310 IBM_PARAM(volume);
4311 IBM_PARAM(fan);
4312
4313 static int __init thinkpad_acpi_module_init(void)
4314 {
4315         int ret, i;
4316
4317         /* Driver-level probe */
4318         ret = probe_for_thinkpad();
4319         if (ret)
4320                 return ret;
4321
4322         /* Driver initialization */
4323         ibm_thinkpad_ec_found = check_dmi_for_ec();
4324         IBM_ACPIHANDLE_INIT(ecrd);
4325         IBM_ACPIHANDLE_INIT(ecwr);
4326
4327         proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
4328         if (!proc_dir) {
4329                 printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
4330                 thinkpad_acpi_module_exit();
4331                 return -ENODEV;
4332         }
4333         proc_dir->owner = THIS_MODULE;
4334
4335         ret = platform_driver_register(&tpacpi_pdriver);
4336         if (ret) {
4337                 printk(IBM_ERR "unable to register platform driver\n");
4338                 thinkpad_acpi_module_exit();
4339                 return ret;
4340         }
4341         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
4342         if (ret) {
4343                 printk(IBM_ERR "unable to create sysfs driver attributes\n");
4344                 thinkpad_acpi_module_exit();
4345                 return ret;
4346         }
4347
4348
4349         /* Device initialization */
4350         tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
4351                                                         NULL, 0);
4352         if (IS_ERR(tpacpi_pdev)) {
4353                 ret = PTR_ERR(tpacpi_pdev);
4354                 tpacpi_pdev = NULL;
4355                 printk(IBM_ERR "unable to register platform device\n");
4356                 thinkpad_acpi_module_exit();
4357                 return ret;
4358         }
4359         tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
4360         if (IS_ERR(tpacpi_hwmon)) {
4361                 ret = PTR_ERR(tpacpi_hwmon);
4362                 tpacpi_hwmon = NULL;
4363                 printk(IBM_ERR "unable to register hwmon device\n");
4364                 thinkpad_acpi_module_exit();
4365                 return ret;
4366         }
4367         tpacpi_inputdev = input_allocate_device();
4368         if (!tpacpi_inputdev) {
4369                 printk(IBM_ERR "unable to allocate input device\n");
4370                 thinkpad_acpi_module_exit();
4371                 return -ENOMEM;
4372         } else {
4373                 /* Prepare input device, but don't register */
4374                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
4375                 tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
4376                 tpacpi_inputdev->id.bustype = BUS_HOST;
4377                 tpacpi_inputdev->id.vendor = TPACPI_HKEY_INPUT_VENDOR;
4378                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
4379                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
4380         }
4381         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
4382                 ret = ibm_init(&ibms_init[i]);
4383                 if (ret >= 0 && *ibms_init[i].param)
4384                         ret = ibms_init[i].data->write(ibms_init[i].param);
4385                 if (ret < 0) {
4386                         thinkpad_acpi_module_exit();
4387                         return ret;
4388                 }
4389         }
4390         ret = input_register_device(tpacpi_inputdev);
4391         if (ret < 0) {
4392                 printk(IBM_ERR "unable to register input device\n");
4393                 thinkpad_acpi_module_exit();
4394                 return ret;
4395         } else {
4396                 tp_features.input_device_registered = 1;
4397         }
4398
4399         return 0;
4400 }
4401
4402 static void thinkpad_acpi_module_exit(void)
4403 {
4404         struct ibm_struct *ibm, *itmp;
4405
4406         list_for_each_entry_safe_reverse(ibm, itmp,
4407                                          &tpacpi_all_drivers,
4408                                          all_drivers) {
4409                 ibm_exit(ibm);
4410         }
4411
4412         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
4413
4414         if (tpacpi_inputdev) {
4415                 if (tp_features.input_device_registered)
4416                         input_unregister_device(tpacpi_inputdev);
4417                 else
4418                         input_free_device(tpacpi_inputdev);
4419         }
4420
4421         if (tpacpi_hwmon)
4422                 hwmon_device_unregister(tpacpi_hwmon);
4423
4424         if (tpacpi_pdev)
4425                 platform_device_unregister(tpacpi_pdev);
4426
4427         tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
4428         platform_driver_unregister(&tpacpi_pdriver);
4429
4430         if (proc_dir)
4431                 remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
4432
4433         kfree(ibm_thinkpad_ec_found);
4434 }
4435
4436 module_init(thinkpad_acpi_module_init);
4437 module_exit(thinkpad_acpi_module_exit);