err.no Git - linux-2.6/blob - 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 TPACPI_VERSION "0.18"
  25 #define TPACPI_SYSFS_VERSION 0x020101
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <asm/uaccess.h>
  71
  72 #include <linux/dmi.h>
  73 #include <linux/jiffies.h>
  74 #include <linux/workqueue.h>
  75
  76 #include <acpi/acpi_drivers.h>
  77 #include <acpi/acnamesp.h>
  78
  79 #include <linux/pci_ids.h>
  80
  81
  82 /* ThinkPad CMOS commands */
  83 #define TP_CMOS_VOLUME_DOWN     0
  84 #define TP_CMOS_VOLUME_UP       1
  85 #define TP_CMOS_VOLUME_MUTE     2
  86 #define TP_CMOS_BRIGHTNESS_UP   4
  87 #define TP_CMOS_BRIGHTNESS_DOWN 5
  88
  89 /* NVRAM Addresses */
  90 enum tp_nvram_addr {
  91         TP_NVRAM_ADDR_HK2               = 0x57,
  92         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  93         TP_NVRAM_ADDR_VIDEO             = 0x59,
  94         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  95         TP_NVRAM_ADDR_MIXER             = 0x60,
  96 };
  97
  98 /* NVRAM bit masks */
  99 enum {
 100         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 101         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 102         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 103         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 104         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 105         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 106         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 107         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 108         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 109         TP_NVRAM_MASK_MUTE              = 0x40,
 110         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 111         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 112         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 113 };
 114
 115 /* ACPI HIDs */
 116 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 117
 118 /* Input IDs */
 119 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 120 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 121
 122
 123 /****************************************************************************
 124  * Main driver
 125  */
 126
 127 #define TPACPI_NAME "thinkpad"
 128 #define TPACPI_DESC "ThinkPad ACPI Extras"
 129 #define TPACPI_FILE TPACPI_NAME "_acpi"
 130 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 131 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 132
 133 #define TPACPI_PROC_DIR "ibm"
 134 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 135 #define TPACPI_DRVR_NAME TPACPI_FILE
 136 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 137
 138 #define TPACPI_MAX_ACPI_ARGS 3
 139
 140 /* Debugging */
 141 #define TPACPI_LOG TPACPI_FILE ": "
 142 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 143 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 144 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 145 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 146
 147 #define TPACPI_DBG_ALL          0xffff
 148 #define TPACPI_DBG_ALL          0xffff
 149 #define TPACPI_DBG_INIT         0x0001
 150 #define TPACPI_DBG_EXIT         0x0002
 151 #define dbg_printk(a_dbg_level, format, arg...) \
 152         do { if (dbg_level & a_dbg_level) \
 153                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 154         } while (0)
 155 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 156 #define vdbg_printk(a_dbg_level, format, arg...) \
 157         dbg_printk(a_dbg_level, format, ## arg)
 158 static const char *str_supported(int is_supported);
 159 #else
 160 #define vdbg_printk(a_dbg_level, format, arg...)
 161 #endif
 162
 163 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 164 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 165 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 166
 167
 168 /****************************************************************************
 169  * Driver-wide structs and misc. variables
 170  */
 171
 172 struct ibm_struct;
 173
 174 struct tp_acpi_drv_struct {
 175         const struct acpi_device_id *hid;
 176         struct acpi_driver *driver;
 177
 178         void (*notify) (struct ibm_struct *, u32);
 179         acpi_handle *handle;
 180         u32 type;
 181         struct acpi_device *device;
 182 };
 183
 184 struct ibm_struct {
 185         char *name;
 186
 187         int (*read) (char *);
 188         int (*write) (char *);
 189         void (*exit) (void);
 190         void (*resume) (void);
 191         void (*suspend) (pm_message_t state);
 192
 193         struct list_head all_drivers;
 194
 195         struct tp_acpi_drv_struct *acpi;
 196
 197         struct {
 198                 u8 acpi_driver_registered:1;
 199                 u8 acpi_notify_installed:1;
 200                 u8 proc_created:1;
 201                 u8 init_called:1;
 202                 u8 experimental:1;
 203         } flags;
 204 };
 205
 206 struct ibm_init_struct {
 207         char param[32];
 208
 209         int (*init) (struct ibm_init_struct *);
 210         struct ibm_struct *data;
 211 };
 212
 213 static struct {
 214 #ifdef CONFIG_THINKPAD_ACPI_BAY
 215         u32 bay_status:1;
 216         u32 bay_eject:1;
 217         u32 bay_status2:1;
 218         u32 bay_eject2:1;
 219 #endif
 220         u32 bluetooth:1;
 221         u32 hotkey:1;
 222         u32 hotkey_mask:1;
 223         u32 hotkey_wlsw:1;
 224         u32 light:1;
 225         u32 light_status:1;
 226         u32 bright_16levels:1;
 227         u32 wan:1;
 228         u32 fan_ctrl_status_undef:1;
 229         u32 input_device_registered:1;
 230         u32 platform_drv_registered:1;
 231         u32 platform_drv_attrs_registered:1;
 232         u32 sensors_pdrv_registered:1;
 233         u32 sensors_pdrv_attrs_registered:1;
 234         u32 sensors_pdev_attrs_registered:1;
 235         u32 hotkey_poll_active:1;
 236 } tp_features;
 237
 238 struct thinkpad_id_data {
 239         unsigned int vendor;    /* ThinkPad vendor:
 240                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 241
 242         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 243         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 244
 245         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 246         u16 ec_model;
 247
 248         char *model_str;
 249 };
 250 static struct thinkpad_id_data thinkpad_id;
 251
 252 static enum {
 253         TPACPI_LIFE_INIT = 0,
 254         TPACPI_LIFE_RUNNING,
 255         TPACPI_LIFE_EXITING,
 256 } tpacpi_lifecycle;
 257
 258 static int experimental;
 259 static u32 dbg_level;
 260
 261 /****************************************************************************
 262  ****************************************************************************
 263  *
 264  * ACPI Helpers and device model
 265  *
 266  ****************************************************************************
 267  ****************************************************************************/
 268
 269 /*************************************************************************
 270  * ACPI basic handles
 271  */
 272
 273 static acpi_handle root_handle;
 274
 275 #define TPACPI_HANDLE(object, parent, paths...)                 \
 276         static acpi_handle  object##_handle;                    \
 277         static acpi_handle *object##_parent = &parent##_handle; \
 278         static char        *object##_path;                      \
 279         static char        *object##_paths[] = { paths }
 280
 281 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 282            "\\_SB.PCI.ISA.EC",  /* 570 */
 283            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 284            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 285            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 286            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 287            "\\_SB.PCI0.LPC.EC", /* all others */
 288            );
 289
 290 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 291 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 292
 293 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 294                                         /* T4x, X31, X40 */
 295            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 296            "\\CMS",             /* R40, R40e */
 297            );                   /* all others */
 298
 299 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 300            "^HKEY",             /* R30, R31 */
 301            "HKEY",              /* all others */
 302            );                   /* 570 */
 303
 304
 305 /*************************************************************************
 306  * ACPI helpers
 307  */
 308
 309 static int acpi_evalf(acpi_handle handle,
 310                       void *res, char *method, char *fmt, ...)
 311 {
 312         char *fmt0 = fmt;
 313         struct acpi_object_list params;
 314         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 315         struct acpi_buffer result, *resultp;
 316         union acpi_object out_obj;
 317         acpi_status status;
 318         va_list ap;
 319         char res_type;
 320         int success;
 321         int quiet;
 322
 323         if (!*fmt) {
 324                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 325                 return 0;
 326         }
 327
 328         if (*fmt == 'q') {
 329                 quiet = 1;
 330                 fmt++;
 331         } else
 332                 quiet = 0;
 333
 334         res_type = *(fmt++);
 335
 336         params.count = 0;
 337         params.pointer = &in_objs[0];
 338
 339         va_start(ap, fmt);
 340         while (*fmt) {
 341                 char c = *(fmt++);
 342                 switch (c) {
 343                 case 'd':       /* int */
 344                         in_objs[params.count].integer.value = va_arg(ap, int);
 345                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 346                         break;
 347                         /* add more types as needed */
 348                 default:
 349                         printk(TPACPI_ERR "acpi_evalf() called "
 350                                "with invalid format character '%c'\n", c);
 351                         return 0;
 352                 }
 353         }
 354         va_end(ap);
 355
 356         if (res_type != 'v') {
 357                 result.length = sizeof(out_obj);
 358                 result.pointer = &out_obj;
 359                 resultp = &result;
 360         } else
 361                 resultp = NULL;
 362
 363         status = acpi_evaluate_object(handle, method, &params, resultp);
 364
 365         switch (res_type) {
 366         case 'd':               /* int */
 367                 if (res)
 368                         *(int *)res = out_obj.integer.value;
 369                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 370                 break;
 371         case 'v':               /* void */
 372                 success = status == AE_OK;
 373                 break;
 374                 /* add more types as needed */
 375         default:
 376                 printk(TPACPI_ERR "acpi_evalf() called "
 377                        "with invalid format character '%c'\n", res_type);
 378                 return 0;
 379         }
 380
 381         if (!success && !quiet)
 382                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 383                        method, fmt0, status);
 384
 385         return success;
 386 }
 387
 388 static int acpi_ec_read(int i, u8 *p)
 389 {
 390         int v;
 391
 392         if (ecrd_handle) {
 393                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 394                         return 0;
 395                 *p = v;
 396         } else {
 397                 if (ec_read(i, p) < 0)
 398                         return 0;
 399         }
 400
 401         return 1;
 402 }
 403
 404 static int acpi_ec_write(int i, u8 v)
 405 {
 406         if (ecwr_handle) {
 407                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 408                         return 0;
 409         } else {
 410                 if (ec_write(i, v) < 0)
 411                         return 0;
 412         }
 413
 414         return 1;
 415 }
 416
 417 static int _sta(acpi_handle handle)
 418 {
 419         int status;
 420
 421         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 422                 status = 0;
 423
 424         return status;
 425 }
 426
 427 static int issue_thinkpad_cmos_command(int cmos_cmd)
 428 {
 429         if (!cmos_handle)
 430                 return -ENXIO;
 431
 432         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 433                 return -EIO;
 434
 435         return 0;
 436 }
 437
 438 /*************************************************************************
 439  * ACPI device model
 440  */
 441
 442 #define TPACPI_ACPIHANDLE_INIT(object) \
 443         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 444                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 445
 446 static void drv_acpi_handle_init(char *name,
 447                            acpi_handle *handle, acpi_handle parent,
 448                            char **paths, int num_paths, char **path)
 449 {
 450         int i;
 451         acpi_status status;
 452
 453         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 454                 name);
 455
 456         for (i = 0; i < num_paths; i++) {
 457                 status = acpi_get_handle(parent, paths[i], handle);
 458                 if (ACPI_SUCCESS(status)) {
 459                         *path = paths[i];
 460                         dbg_printk(TPACPI_DBG_INIT,
 461                                    "Found ACPI handle %s for %s\n",
 462                                    *path, name);
 463                         return;
 464                 }
 465         }
 466
 467         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 468                     name);
 469         *handle = NULL;
 470 }
 471
 472 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 473 {
 474         struct ibm_struct *ibm = data;
 475
 476         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 477                 return;
 478
 479         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 480                 return;
 481
 482         ibm->acpi->notify(ibm, event);
 483 }
 484
 485 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 486 {
 487         acpi_status status;
 488         int rc;
 489
 490         BUG_ON(!ibm->acpi);
 491
 492         if (!*ibm->acpi->handle)
 493                 return 0;
 494
 495         vdbg_printk(TPACPI_DBG_INIT,
 496                 "setting up ACPI notify for %s\n", ibm->name);
 497
 498         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 499         if (rc < 0) {
 500                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 501                         ibm->name, rc);
 502                 return -ENODEV;
 503         }
 504
 505         acpi_driver_data(ibm->acpi->device) = ibm;
 506         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 507                 TPACPI_ACPI_EVENT_PREFIX,
 508                 ibm->name);
 509
 510         status = acpi_install_notify_handler(*ibm->acpi->handle,
 511                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 512         if (ACPI_FAILURE(status)) {
 513                 if (status == AE_ALREADY_EXISTS) {
 514                         printk(TPACPI_NOTICE
 515                                "another device driver is already "
 516                                "handling %s events\n", ibm->name);
 517                 } else {
 518                         printk(TPACPI_ERR
 519                                "acpi_install_notify_handler(%s) failed: %d\n",
 520                                ibm->name, status);
 521                 }
 522                 return -ENODEV;
 523         }
 524         ibm->flags.acpi_notify_installed = 1;
 525         return 0;
 526 }
 527
 528 static int __init tpacpi_device_add(struct acpi_device *device)
 529 {
 530         return 0;
 531 }
 532
 533 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 534 {
 535         int rc;
 536
 537         dbg_printk(TPACPI_DBG_INIT,
 538                 "registering %s as an ACPI driver\n", ibm->name);
 539
 540         BUG_ON(!ibm->acpi);
 541
 542         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 543         if (!ibm->acpi->driver) {
 544                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 545                 return -ENOMEM;
 546         }
 547
 548         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 549         ibm->acpi->driver->ids = ibm->acpi->hid;
 550
 551         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 552
 553         rc = acpi_bus_register_driver(ibm->acpi->driver);
 554         if (rc < 0) {
 555                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 556                        ibm->name, rc);
 557                 kfree(ibm->acpi->driver);
 558                 ibm->acpi->driver = NULL;
 559         } else if (!rc)
 560                 ibm->flags.acpi_driver_registered = 1;
 561
 562         return rc;
 563 }
 564
 565
 566 /****************************************************************************
 567  ****************************************************************************
 568  *
 569  * Procfs Helpers
 570  *
 571  ****************************************************************************
 572  ****************************************************************************/
 573
 574 static int dispatch_procfs_read(char *page, char **start, off_t off,
 575                         int count, int *eof, void *data)
 576 {
 577         struct ibm_struct *ibm = data;
 578         int len;
 579
 580         if (!ibm || !ibm->read)
 581                 return -EINVAL;
 582
 583         len = ibm->read(page);
 584         if (len < 0)
 585                 return len;
 586
 587         if (len <= off + count)
 588                 *eof = 1;
 589         *start = page + off;
 590         len -= off;
 591         if (len > count)
 592                 len = count;
 593         if (len < 0)
 594                 len = 0;
 595
 596         return len;
 597 }
 598
 599 static int dispatch_procfs_write(struct file *file,
 600                         const char __user *userbuf,
 601                         unsigned long count, void *data)
 602 {
 603         struct ibm_struct *ibm = data;
 604         char *kernbuf;
 605         int ret;
 606
 607         if (!ibm || !ibm->write)
 608                 return -EINVAL;
 609
 610         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 611         if (!kernbuf)
 612                 return -ENOMEM;
 613
 614         if (copy_from_user(kernbuf, userbuf, count)) {
 615                 kfree(kernbuf);
 616                 return -EFAULT;
 617         }
 618
 619         kernbuf[count] = 0;
 620         strcat(kernbuf, ",");
 621         ret = ibm->write(kernbuf);
 622         if (ret == 0)
 623                 ret = count;
 624
 625         kfree(kernbuf);
 626
 627         return ret;
 628 }
 629
 630 static char *next_cmd(char **cmds)
 631 {
 632         char *start = *cmds;
 633         char *end;
 634
 635         while ((end = strchr(start, ',')) && end == start)
 636                 start = end + 1;
 637
 638         if (!end)
 639                 return NULL;
 640
 641         *end = 0;
 642         *cmds = end + 1;
 643         return start;
 644 }
 645
 646
 647 /****************************************************************************
 648  ****************************************************************************
 649  *
 650  * Device model: input, hwmon and platform
 651  *
 652  ****************************************************************************
 653  ****************************************************************************/
 654
 655 static struct platform_device *tpacpi_pdev;
 656 static struct platform_device *tpacpi_sensors_pdev;
 657 static struct device *tpacpi_hwmon;
 658 static struct input_dev *tpacpi_inputdev;
 659 static struct mutex tpacpi_inputdev_send_mutex;
 660 static LIST_HEAD(tpacpi_all_drivers);
 661
 662 static int tpacpi_suspend_handler(struct platform_device *pdev,
 663                                   pm_message_t state)
 664 {
 665         struct ibm_struct *ibm, *itmp;
 666
 667         list_for_each_entry_safe(ibm, itmp,
 668                                  &tpacpi_all_drivers,
 669                                  all_drivers) {
 670                 if (ibm->suspend)
 671                         (ibm->suspend)(state);
 672         }
 673
 674         return 0;
 675 }
 676
 677 static int tpacpi_resume_handler(struct platform_device *pdev)
 678 {
 679         struct ibm_struct *ibm, *itmp;
 680
 681         list_for_each_entry_safe(ibm, itmp,
 682                                  &tpacpi_all_drivers,
 683                                  all_drivers) {
 684                 if (ibm->resume)
 685                         (ibm->resume)();
 686         }
 687
 688         return 0;
 689 }
 690
 691 static struct platform_driver tpacpi_pdriver = {
 692         .driver = {
 693                 .name = TPACPI_DRVR_NAME,
 694                 .owner = THIS_MODULE,
 695         },
 696         .suspend = tpacpi_suspend_handler,
 697         .resume = tpacpi_resume_handler,
 698 };
 699
 700 static struct platform_driver tpacpi_hwmon_pdriver = {
 701         .driver = {
 702                 .name = TPACPI_HWMON_DRVR_NAME,
 703                 .owner = THIS_MODULE,
 704         },
 705 };
 706
 707 /*************************************************************************
 708  * sysfs support helpers
 709  */
 710
 711 struct attribute_set {
 712         unsigned int members, max_members;
 713         struct attribute_group group;
 714 };
 715
 716 struct attribute_set_obj {
 717         struct attribute_set s;
 718         struct attribute *a;
 719 } __attribute__((packed));
 720
 721 static struct attribute_set *create_attr_set(unsigned int max_members,
 722                                                 const char *name)
 723 {
 724         struct attribute_set_obj *sobj;
 725
 726         if (max_members == 0)
 727                 return NULL;
 728
 729         /* Allocates space for implicit NULL at the end too */
 730         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 731                     max_members * sizeof(struct attribute *),
 732                     GFP_KERNEL);
 733         if (!sobj)
 734                 return NULL;
 735         sobj->s.max_members = max_members;
 736         sobj->s.group.attrs = &sobj->a;
 737         sobj->s.group.name = name;
 738
 739         return &sobj->s;
 740 }
 741
 742 #define destroy_attr_set(_set) \
 743         kfree(_set);
 744
 745 /* not multi-threaded safe, use it in a single thread per set */
 746 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 747 {
 748         if (!s || !attr)
 749                 return -EINVAL;
 750
 751         if (s->members >= s->max_members)
 752                 return -ENOMEM;
 753
 754         s->group.attrs[s->members] = attr;
 755         s->members++;
 756
 757         return 0;
 758 }
 759
 760 static int add_many_to_attr_set(struct attribute_set *s,
 761                         struct attribute **attr,
 762                         unsigned int count)
 763 {
 764         int i, res;
 765
 766         for (i = 0; i < count; i++) {
 767                 res = add_to_attr_set(s, attr[i]);
 768                 if (res)
 769                         return res;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 776 {
 777         sysfs_remove_group(kobj, &s->group);
 778         destroy_attr_set(s);
 779 }
 780
 781 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 782         sysfs_create_group(_kobj, &_attr_set->group)
 783
 784 static int parse_strtoul(const char *buf,
 785                 unsigned long max, unsigned long *value)
 786 {
 787         char *endp;
 788
 789         while (*buf && isspace(*buf))
 790                 buf++;
 791         *value = simple_strtoul(buf, &endp, 0);
 792         while (*endp && isspace(*endp))
 793                 endp++;
 794         if (*endp || *value > max)
 795                 return -EINVAL;
 796
 797         return 0;
 798 }
 799
 800 /*************************************************************************
 801  * thinkpad-acpi driver attributes
 802  */
 803
 804 /* interface_version --------------------------------------------------- */
 805 static ssize_t tpacpi_driver_interface_version_show(
 806                                 struct device_driver *drv,
 807                                 char *buf)
 808 {
 809         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 810 }
 811
 812 static DRIVER_ATTR(interface_version, S_IRUGO,
 813                 tpacpi_driver_interface_version_show, NULL);
 814
 815 /* debug_level --------------------------------------------------------- */
 816 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 817                                                 char *buf)
 818 {
 819         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 820 }
 821
 822 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 823                                                 const char *buf, size_t count)
 824 {
 825         unsigned long t;
 826
 827         if (parse_strtoul(buf, 0xffff, &t))
 828                 return -EINVAL;
 829
 830         dbg_level = t;
 831
 832         return count;
 833 }
 834
 835 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 836                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 837
 838 /* version ------------------------------------------------------------- */
 839 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 840                                                 char *buf)
 841 {
 842         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 843                         TPACPI_DESC, TPACPI_VERSION);
 844 }
 845
 846 static DRIVER_ATTR(version, S_IRUGO,
 847                 tpacpi_driver_version_show, NULL);
 848
 849 /* --------------------------------------------------------------------- */
 850
 851 static struct driver_attribute *tpacpi_driver_attributes[] = {
 852         &driver_attr_debug_level, &driver_attr_version,
 853         &driver_attr_interface_version,
 854 };
 855
 856 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 857 {
 858         int i, res;
 859
 860         i = 0;
 861         res = 0;
 862         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 863                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 864                 i++;
 865         }
 866
 867         return res;
 868 }
 869
 870 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 871 {
 872         int i;
 873
 874         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 875                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 876 }
 877
 878 /****************************************************************************
 879  ****************************************************************************
 880  *
 881  * Subdrivers
 882  *
 883  ****************************************************************************
 884  ****************************************************************************/
 885
 886 /*************************************************************************
 887  * thinkpad-acpi init subdriver
 888  */
 889
 890 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 891 {
 892         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 893         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 894
 895         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
 896                 (thinkpad_id.bios_version_str) ?
 897                         thinkpad_id.bios_version_str : "unknown",
 898                 (thinkpad_id.ec_version_str) ?
 899                         thinkpad_id.ec_version_str : "unknown");
 900
 901         if (thinkpad_id.vendor && thinkpad_id.model_str)
 902                 printk(TPACPI_INFO "%s %s\n",
 903                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 904                                 "IBM" : ((thinkpad_id.vendor ==
 905                                                 PCI_VENDOR_ID_LENOVO) ?
 906                                         "Lenovo" : "Unknown vendor"),
 907                         thinkpad_id.model_str);
 908
 909         return 0;
 910 }
 911
 912 static int thinkpad_acpi_driver_read(char *p)
 913 {
 914         int len = 0;
 915
 916         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
 917         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
 918
 919         return len;
 920 }
 921
 922 static struct ibm_struct thinkpad_acpi_driver_data = {
 923         .name = "driver",
 924         .read = thinkpad_acpi_driver_read,
 925 };
 926
 927 /*************************************************************************
 928  * Hotkey subdriver
 929  */
 930
 931 enum {  /* hot key scan codes (derived from ACPI DSDT) */
 932         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
 933         TP_ACPI_HOTKEYSCAN_FNF2,
 934         TP_ACPI_HOTKEYSCAN_FNF3,
 935         TP_ACPI_HOTKEYSCAN_FNF4,
 936         TP_ACPI_HOTKEYSCAN_FNF5,
 937         TP_ACPI_HOTKEYSCAN_FNF6,
 938         TP_ACPI_HOTKEYSCAN_FNF7,
 939         TP_ACPI_HOTKEYSCAN_FNF8,
 940         TP_ACPI_HOTKEYSCAN_FNF9,
 941         TP_ACPI_HOTKEYSCAN_FNF10,
 942         TP_ACPI_HOTKEYSCAN_FNF11,
 943         TP_ACPI_HOTKEYSCAN_FNF12,
 944         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
 945         TP_ACPI_HOTKEYSCAN_FNINSERT,
 946         TP_ACPI_HOTKEYSCAN_FNDELETE,
 947         TP_ACPI_HOTKEYSCAN_FNHOME,
 948         TP_ACPI_HOTKEYSCAN_FNEND,
 949         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 950         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
 951         TP_ACPI_HOTKEYSCAN_FNSPACE,
 952         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 953         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 954         TP_ACPI_HOTKEYSCAN_MUTE,
 955         TP_ACPI_HOTKEYSCAN_THINKPAD,
 956 };
 957
 958 enum {  /* Keys available through NVRAM polling */
 959         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
 960         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
 961 };
 962
 963 enum {  /* Positions of some of the keys in hotkey masks */
 964         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
 965         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
 966         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
 967         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
 968         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
 969         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 970         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
 971         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 972         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 973         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
 974         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
 975 };
 976
 977 enum {  /* NVRAM to ACPI HKEY group map */
 978         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
 979                                           TP_ACPI_HKEY_ZOOM_MASK |
 980                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
 981                                           TP_ACPI_HKEY_HIBERNATE_MASK,
 982         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
 983                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
 984         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
 985                                           TP_ACPI_HKEY_VOLDWN_MASK |
 986                                           TP_ACPI_HKEY_MUTE_MASK,
 987 };
 988
 989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
 990 struct tp_nvram_state {
 991        u16 thinkpad_toggle:1;
 992        u16 zoom_toggle:1;
 993        u16 display_toggle:1;
 994        u16 thinklight_toggle:1;
 995        u16 hibernate_toggle:1;
 996        u16 displayexp_toggle:1;
 997        u16 display_state:1;
 998        u16 brightness_toggle:1;
 999        u16 volume_toggle:1;
1000        u16 mute:1;
1001
1002        u8 brightness_level;
1003        u8 volume_level;
1004 };
1005
1006 static struct task_struct *tpacpi_hotkey_task;
1007 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1008 static int hotkey_poll_freq = 10;       /* Hz */
1009 static struct mutex hotkey_thread_mutex;
1010 static struct mutex hotkey_thread_data_mutex;
1011 static unsigned int hotkey_config_change;
1012
1013 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1014
1015 #define hotkey_source_mask 0U
1016
1017 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1018
1019 static struct mutex hotkey_mutex;
1020
1021 static enum {   /* Reasons for waking up */
1022         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1023         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1024         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1025 } hotkey_wakeup_reason;
1026
1027 static int hotkey_autosleep_ack;
1028
1029 static int hotkey_orig_status;
1030 static u32 hotkey_orig_mask;
1031 static u32 hotkey_all_mask;
1032 static u32 hotkey_reserved_mask;
1033 static u32 hotkey_mask;
1034
1035 static unsigned int hotkey_report_mode;
1036
1037 static u16 *hotkey_keycode_map;
1038
1039 static struct attribute_set *hotkey_dev_attributes;
1040
1041 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1042 #define HOTKEY_CONFIG_CRITICAL_START \
1043         do { \
1044                 mutex_lock(&hotkey_thread_data_mutex); \
1045                 hotkey_config_change++; \
1046         } while (0);
1047 #define HOTKEY_CONFIG_CRITICAL_END \
1048         mutex_unlock(&hotkey_thread_data_mutex);
1049 #else
1050 #define HOTKEY_CONFIG_CRITICAL_START
1051 #define HOTKEY_CONFIG_CRITICAL_END
1052 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1053
1054 static int hotkey_get_wlsw(int *status)
1055 {
1056         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1057                 return -EIO;
1058         return 0;
1059 }
1060
1061 /*
1062  * Call with hotkey_mutex held
1063  */
1064 static int hotkey_mask_get(void)
1065 {
1066         u32 m = 0;
1067
1068         if (tp_features.hotkey_mask) {
1069                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1070                         return -EIO;
1071         }
1072         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1073
1074         return 0;
1075 }
1076
1077 /*
1078  * Call with hotkey_mutex held
1079  */
1080 static int hotkey_mask_set(u32 mask)
1081 {
1082         int i;
1083         int rc = 0;
1084
1085         if (tp_features.hotkey_mask) {
1086                 HOTKEY_CONFIG_CRITICAL_START
1087                 for (i = 0; i < 32; i++) {
1088                         u32 m = 1 << i;
1089                         /* enable in firmware mask only keys not in NVRAM
1090                          * mode, but enable the key in the cached hotkey_mask
1091                          * regardless of mode, or the key will end up
1092                          * disabled by hotkey_mask_get() */
1093                         if (!acpi_evalf(hkey_handle,
1094                                         NULL, "MHKM", "vdd", i + 1,
1095                                         !!((mask & ~hotkey_source_mask) & m))) {
1096                                 rc = -EIO;
1097                                 break;
1098                         } else {
1099                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1100                         }
1101                 }
1102                 HOTKEY_CONFIG_CRITICAL_END
1103
1104                 /* hotkey_mask_get must be called unconditionally below */
1105                 if (!hotkey_mask_get() && !rc &&
1106                     (hotkey_mask & ~hotkey_source_mask) !=
1107                      (mask & ~hotkey_source_mask)) {
1108                         printk(TPACPI_NOTICE
1109                                "requested hot key mask 0x%08x, but "
1110                                "firmware forced it to 0x%08x\n",
1111                                mask, hotkey_mask);
1112                 }
1113         } else {
1114 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1115                 HOTKEY_CONFIG_CRITICAL_START
1116                 hotkey_mask = mask & hotkey_source_mask;
1117                 HOTKEY_CONFIG_CRITICAL_END
1118                 hotkey_mask_get();
1119                 if (hotkey_mask != mask) {
1120                         printk(TPACPI_NOTICE
1121                                "requested hot key mask 0x%08x, "
1122                                "forced to 0x%08x (NVRAM poll mask is "
1123                                "0x%08x): no firmware mask support\n",
1124                                mask, hotkey_mask, hotkey_source_mask);
1125                 }
1126 #else
1127                 hotkey_mask_get();
1128                 rc = -ENXIO;
1129 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1130         }
1131
1132         return rc;
1133 }
1134
1135 static int hotkey_status_get(int *status)
1136 {
1137         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1138                 return -EIO;
1139
1140         return 0;
1141 }
1142
1143 static int hotkey_status_set(int status)
1144 {
1145         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1146                 return -EIO;
1147
1148         return 0;
1149 }
1150
1151 static void tpacpi_input_send_radiosw(void)
1152 {
1153         int wlsw;
1154
1155         mutex_lock(&tpacpi_inputdev_send_mutex);
1156
1157         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1158                 input_report_switch(tpacpi_inputdev,
1159                                     SW_RADIO, !!wlsw);
1160                 input_sync(tpacpi_inputdev);
1161         }
1162
1163         mutex_unlock(&tpacpi_inputdev_send_mutex);
1164 }
1165
1166 static void tpacpi_input_send_key(unsigned int scancode)
1167 {
1168         unsigned int keycode;
1169
1170         keycode = hotkey_keycode_map[scancode];
1171
1172         if (keycode != KEY_RESERVED) {
1173                 mutex_lock(&tpacpi_inputdev_send_mutex);
1174
1175                 input_report_key(tpacpi_inputdev, keycode, 1);
1176                 if (keycode == KEY_UNKNOWN)
1177                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1178                                     scancode);
1179                 input_sync(tpacpi_inputdev);
1180
1181                 input_report_key(tpacpi_inputdev, keycode, 0);
1182                 if (keycode == KEY_UNKNOWN)
1183                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1184                                     scancode);
1185                 input_sync(tpacpi_inputdev);
1186
1187                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1188         }
1189 }
1190
1191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1192 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1193
1194 static void tpacpi_hotkey_send_key(unsigned int scancode)
1195 {
1196         tpacpi_input_send_key(scancode);
1197         if (hotkey_report_mode < 2) {
1198                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1199                                                 0x80, 0x1001 + scancode);
1200         }
1201 }
1202
1203 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1204 {
1205         u8 d;
1206
1207         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1208                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1209                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1210                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1211                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1212                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1213         }
1214         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1215                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1216                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1217         }
1218         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1219                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1220                 n->displayexp_toggle =
1221                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1222         }
1223         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1224                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1225                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1226                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1227                 n->brightness_toggle =
1228                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1229         }
1230         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1231                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1232                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1233                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1234                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1235                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1236         }
1237 }
1238
1239 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1240         do { \
1241                 if ((mask & (1 << __scancode)) && \
1242                     oldn->__member != newn->__member) \
1243                 tpacpi_hotkey_send_key(__scancode); \
1244         } while (0)
1245
1246 #define TPACPI_MAY_SEND_KEY(__scancode) \
1247         do { if (mask & (1 << __scancode)) \
1248                 tpacpi_hotkey_send_key(__scancode); } while (0)
1249
1250 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1251                                            struct tp_nvram_state *newn,
1252                                            u32 mask)
1253 {
1254         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1255         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1256         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1257         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1258
1259         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1260
1261         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1262
1263         /* handle volume */
1264         if (oldn->volume_toggle != newn->volume_toggle) {
1265                 if (oldn->mute != newn->mute) {
1266                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1267                 }
1268                 if (oldn->volume_level > newn->volume_level) {
1269                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1270                 } else if (oldn->volume_level < newn->volume_level) {
1271                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1272                 } else if (oldn->mute == newn->mute) {
1273                         /* repeated key presses that didn't change state */
1274                         if (newn->mute) {
1275                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1276                         } else if (newn->volume_level != 0) {
1277                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1278                         } else {
1279                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1280                         }
1281                 }
1282         }
1283
1284         /* handle brightness */
1285         if (oldn->brightness_toggle != newn->brightness_toggle) {
1286                 if (oldn->brightness_level < newn->brightness_level) {
1287                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1288                 } else if (oldn->brightness_level > newn->brightness_level) {
1289                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1290                 } else {
1291                         /* repeated key presses that didn't change state */
1292                         if (newn->brightness_level != 0) {
1293                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1294                         } else {
1295                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1296                         }
1297                 }
1298         }
1299 }
1300
1301 #undef TPACPI_COMPARE_KEY
1302 #undef TPACPI_MAY_SEND_KEY
1303
1304 static int hotkey_kthread(void *data)
1305 {
1306         struct tp_nvram_state s[2];
1307         u32 mask;
1308         unsigned int si, so;
1309         unsigned long t;
1310         unsigned int change_detector, must_reset;
1311
1312         mutex_lock(&hotkey_thread_mutex);
1313
1314         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1315                 goto exit;
1316
1317         set_freezable();
1318
1319         so = 0;
1320         si = 1;
1321         t = 0;
1322
1323         /* Initial state for compares */
1324         mutex_lock(&hotkey_thread_data_mutex);
1325         change_detector = hotkey_config_change;
1326         mask = hotkey_source_mask & hotkey_mask;
1327         mutex_unlock(&hotkey_thread_data_mutex);
1328         hotkey_read_nvram(&s[so], mask);
1329
1330         while (!kthread_should_stop() && hotkey_poll_freq) {
1331                 if (t == 0)
1332                         t = 1000/hotkey_poll_freq;
1333                 t = msleep_interruptible(t);
1334                 if (unlikely(kthread_should_stop()))
1335                         break;
1336                 must_reset = try_to_freeze();
1337                 if (t > 0 && !must_reset)
1338                         continue;
1339
1340                 mutex_lock(&hotkey_thread_data_mutex);
1341                 if (must_reset || hotkey_config_change != change_detector) {
1342                         /* forget old state on thaw or config change */
1343                         si = so;
1344                         t = 0;
1345                         change_detector = hotkey_config_change;
1346                 }
1347                 mask = hotkey_source_mask & hotkey_mask;
1348                 mutex_unlock(&hotkey_thread_data_mutex);
1349
1350                 if (likely(mask)) {
1351                         hotkey_read_nvram(&s[si], mask);
1352                         if (likely(si != so)) {
1353                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1354                                                                 mask);
1355                         }
1356                 }
1357
1358                 so = si;
1359                 si ^= 1;
1360         }
1361
1362 exit:
1363         mutex_unlock(&hotkey_thread_mutex);
1364         return 0;
1365 }
1366
1367 static void hotkey_poll_stop_sync(void)
1368 {
1369         if (tpacpi_hotkey_task) {
1370                 if (frozen(tpacpi_hotkey_task) ||
1371                     freezing(tpacpi_hotkey_task))
1372                         thaw_process(tpacpi_hotkey_task);
1373
1374                 kthread_stop(tpacpi_hotkey_task);
1375                 tpacpi_hotkey_task = NULL;
1376                 mutex_lock(&hotkey_thread_mutex);
1377                 /* at this point, the thread did exit */
1378                 mutex_unlock(&hotkey_thread_mutex);
1379         }
1380 }
1381
1382 /* call with hotkey_mutex held */
1383 static void hotkey_poll_setup(int may_warn)
1384 {
1385         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1386             hotkey_poll_freq > 0 &&
1387             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1388                 if (!tpacpi_hotkey_task) {
1389                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1390                                                          NULL,
1391                                                          TPACPI_FILE "d");
1392                         if (IS_ERR(tpacpi_hotkey_task)) {
1393                                 tpacpi_hotkey_task = NULL;
1394                                 printk(TPACPI_ERR
1395                                        "could not create kernel thread "
1396                                        "for hotkey polling\n");
1397                         }
1398                 }
1399         } else {
1400                 hotkey_poll_stop_sync();
1401                 if (may_warn &&
1402                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1403                         printk(TPACPI_NOTICE
1404                                 "hot keys 0x%08x require polling, "
1405                                 "which is currently disabled\n",
1406                                 hotkey_source_mask);
1407                 }
1408         }
1409 }
1410
1411 static void hotkey_poll_setup_safe(int may_warn)
1412 {
1413         mutex_lock(&hotkey_mutex);
1414         hotkey_poll_setup(may_warn);
1415         mutex_unlock(&hotkey_mutex);
1416 }
1417
1418 static int hotkey_inputdev_open(struct input_dev *dev)
1419 {
1420         switch (tpacpi_lifecycle) {
1421         case TPACPI_LIFE_INIT:
1422                 /*
1423                  * hotkey_init will call hotkey_poll_setup_safe
1424                  * at the appropriate moment
1425                  */
1426                 return 0;
1427         case TPACPI_LIFE_EXITING:
1428                 return -EBUSY;
1429         case TPACPI_LIFE_RUNNING:
1430                 hotkey_poll_setup_safe(0);
1431                 return 0;
1432         }
1433
1434         /* Should only happen if tpacpi_lifecycle is corrupt */
1435         BUG();
1436         return -EBUSY;
1437 }
1438
1439 static void hotkey_inputdev_close(struct input_dev *dev)
1440 {
1441         /* disable hotkey polling when possible */
1442         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1443                 hotkey_poll_setup_safe(0);
1444 }
1445 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1446
1447 /* sysfs hotkey enable ------------------------------------------------- */
1448 static ssize_t hotkey_enable_show(struct device *dev,
1449                            struct device_attribute *attr,
1450                            char *buf)
1451 {
1452         int res, status;
1453
1454         res = hotkey_status_get(&status);
1455         if (res)
1456                 return res;
1457
1458         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1459 }
1460
1461 static ssize_t hotkey_enable_store(struct device *dev,
1462                             struct device_attribute *attr,
1463                             const char *buf, size_t count)
1464 {
1465         unsigned long t;
1466         int res;
1467
1468         if (parse_strtoul(buf, 1, &t))
1469                 return -EINVAL;
1470
1471         res = hotkey_status_set(t);
1472
1473         return (res) ? res : count;
1474 }
1475
1476 static struct device_attribute dev_attr_hotkey_enable =
1477         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1478                 hotkey_enable_show, hotkey_enable_store);
1479
1480 /* sysfs hotkey mask --------------------------------------------------- */
1481 static ssize_t hotkey_mask_show(struct device *dev,
1482                            struct device_attribute *attr,
1483                            char *buf)
1484 {
1485         int res;
1486
1487         if (mutex_lock_interruptible(&hotkey_mutex))
1488                 return -ERESTARTSYS;
1489         res = hotkey_mask_get();
1490         mutex_unlock(&hotkey_mutex);
1491
1492         return (res)?
1493                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1494 }
1495
1496 static ssize_t hotkey_mask_store(struct device *dev,
1497                             struct device_attribute *attr,
1498                             const char *buf, size_t count)
1499 {
1500         unsigned long t;
1501         int res;
1502
1503         if (parse_strtoul(buf, 0xffffffffUL, &t))
1504                 return -EINVAL;
1505
1506         if (mutex_lock_interruptible(&hotkey_mutex))
1507                 return -ERESTARTSYS;
1508
1509         res = hotkey_mask_set(t);
1510
1511 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1512         hotkey_poll_setup(1);
1513 #endif
1514
1515         mutex_unlock(&hotkey_mutex);
1516
1517         return (res) ? res : count;
1518 }
1519
1520 static struct device_attribute dev_attr_hotkey_mask =
1521         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1522                 hotkey_mask_show, hotkey_mask_store);
1523
1524 /* sysfs hotkey bios_enabled ------------------------------------------- */
1525 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1526                            struct device_attribute *attr,
1527                            char *buf)
1528 {
1529         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1530 }
1531
1532 static struct device_attribute dev_attr_hotkey_bios_enabled =
1533         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1534
1535 /* sysfs hotkey bios_mask ---------------------------------------------- */
1536 static ssize_t hotkey_bios_mask_show(struct device *dev,
1537                            struct device_attribute *attr,
1538                            char *buf)
1539 {
1540         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1541 }
1542
1543 static struct device_attribute dev_attr_hotkey_bios_mask =
1544         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1545
1546 /* sysfs hotkey all_mask ----------------------------------------------- */
1547 static ssize_t hotkey_all_mask_show(struct device *dev,
1548                            struct device_attribute *attr,
1549                            char *buf)
1550 {
1551         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1552                                 hotkey_all_mask | hotkey_source_mask);
1553 }
1554
1555 static struct device_attribute dev_attr_hotkey_all_mask =
1556         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1557
1558 /* sysfs hotkey recommended_mask --------------------------------------- */
1559 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1560                                             struct device_attribute *attr,
1561                                             char *buf)
1562 {
1563         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1564                         (hotkey_all_mask | hotkey_source_mask)
1565                         & ~hotkey_reserved_mask);
1566 }
1567
1568 static struct device_attribute dev_attr_hotkey_recommended_mask =
1569         __ATTR(hotkey_recommended_mask, S_IRUGO,
1570                 hotkey_recommended_mask_show, NULL);
1571
1572 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1573
1574 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1575 static ssize_t hotkey_source_mask_show(struct device *dev,
1576                            struct device_attribute *attr,
1577                            char *buf)
1578 {
1579         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1580 }
1581
1582 static ssize_t hotkey_source_mask_store(struct device *dev,
1583                             struct device_attribute *attr,
1584                             const char *buf, size_t count)
1585 {
1586         unsigned long t;
1587
1588         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1589                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1590                 return -EINVAL;
1591
1592         if (mutex_lock_interruptible(&hotkey_mutex))
1593                 return -ERESTARTSYS;
1594
1595         HOTKEY_CONFIG_CRITICAL_START
1596         hotkey_source_mask = t;
1597         HOTKEY_CONFIG_CRITICAL_END
1598
1599         hotkey_poll_setup(1);
1600
1601         mutex_unlock(&hotkey_mutex);
1602
1603         return count;
1604 }
1605
1606 static struct device_attribute dev_attr_hotkey_source_mask =
1607         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1608                 hotkey_source_mask_show, hotkey_source_mask_store);
1609
1610 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1611 static ssize_t hotkey_poll_freq_show(struct device *dev,
1612                            struct device_attribute *attr,
1613                            char *buf)
1614 {
1615         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1616 }
1617
1618 static ssize_t hotkey_poll_freq_store(struct device *dev,
1619                             struct device_attribute *attr,
1620                             const char *buf, size_t count)
1621 {
1622         unsigned long t;
1623
1624         if (parse_strtoul(buf, 25, &t))
1625                 return -EINVAL;
1626
1627         if (mutex_lock_interruptible(&hotkey_mutex))
1628                 return -ERESTARTSYS;
1629
1630         hotkey_poll_freq = t;
1631
1632         hotkey_poll_setup(1);
1633         mutex_unlock(&hotkey_mutex);
1634
1635         return count;
1636 }
1637
1638 static struct device_attribute dev_attr_hotkey_poll_freq =
1639         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1640                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1641
1642 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1643
1644 /* sysfs hotkey radio_sw ----------------------------------------------- */
1645 static ssize_t hotkey_radio_sw_show(struct device *dev,
1646                            struct device_attribute *attr,
1647                            char *buf)
1648 {
1649         int res, s;
1650         res = hotkey_get_wlsw(&s);
1651         if (res < 0)
1652                 return res;
1653
1654         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1655 }
1656
1657 static struct device_attribute dev_attr_hotkey_radio_sw =
1658         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1659
1660 /* sysfs hotkey report_mode -------------------------------------------- */
1661 static ssize_t hotkey_report_mode_show(struct device *dev,
1662                            struct device_attribute *attr,
1663                            char *buf)
1664 {
1665         return snprintf(buf, PAGE_SIZE, "%d\n",
1666                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1667 }
1668
1669 static struct device_attribute dev_attr_hotkey_report_mode =
1670         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1671
1672 /* sysfs wakeup reason ------------------------------------------------- */
1673 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1674                            struct device_attribute *attr,
1675                            char *buf)
1676 {
1677         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1678 }
1679
1680 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1681         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1682
1683 /* sysfs wakeup hotunplug_complete ------------------------------------- */
1684 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1685                            struct device_attribute *attr,
1686                            char *buf)
1687 {
1688         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1689 }
1690
1691 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1692         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1693                hotkey_wakeup_hotunplug_complete_show, NULL);
1694
1695 /* --------------------------------------------------------------------- */
1696
1697 static struct attribute *hotkey_attributes[] __initdata = {
1698         &dev_attr_hotkey_enable.attr,
1699         &dev_attr_hotkey_bios_enabled.attr,
1700         &dev_attr_hotkey_report_mode.attr,
1701 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1702         &dev_attr_hotkey_mask.attr,
1703         &dev_attr_hotkey_all_mask.attr,
1704         &dev_attr_hotkey_recommended_mask.attr,
1705         &dev_attr_hotkey_source_mask.attr,
1706         &dev_attr_hotkey_poll_freq.attr,
1707 #endif
1708 };
1709
1710 static struct attribute *hotkey_mask_attributes[] __initdata = {
1711         &dev_attr_hotkey_bios_mask.attr,
1712 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1713         &dev_attr_hotkey_mask.attr,
1714         &dev_attr_hotkey_all_mask.attr,
1715         &dev_attr_hotkey_recommended_mask.attr,
1716 #endif
1717         &dev_attr_hotkey_wakeup_reason.attr,
1718         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1719 };
1720
1721 static int __init hotkey_init(struct ibm_init_struct *iibm)
1722 {
1723         /* Requirements for changing the default keymaps:
1724          *
1725          * 1. Many of the keys are mapped to KEY_RESERVED for very
1726          *    good reasons.  Do not change them unless you have deep
1727          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1728          *    the various ThinkPad models.  The driver behaves
1729          *    differently for KEY_RESERVED: such keys have their
1730          *    hot key mask *unset* in mask_recommended, and also
1731          *    in the initial hot key mask programmed into the
1732          *    firmware at driver load time, which means the firm-
1733          *    ware may react very differently if you change them to
1734          *    something else;
1735          *
1736          * 2. You must be subscribed to the linux-thinkpad and
1737          *    ibm-acpi-devel mailing lists, and you should read the
1738          *    list archives since 2007 if you want to change the
1739          *    keymaps.  This requirement exists so that you will
1740          *    know the past history of problems with the thinkpad-
1741          *    acpi driver keymaps, and also that you will be
1742          *    listening to any bug reports;
1743          *
1744          * 3. Do not send thinkpad-acpi specific patches directly to
1745          *    for merging, *ever*.  Send them to the linux-acpi
1746          *    mailinglist for comments.  Merging is to be done only
1747          *    through acpi-test and the ACPI maintainer.
1748          *
1749          * If the above is too much to ask, don't change the keymap.
1750          * Ask the thinkpad-acpi maintainer to do it, instead.
1751          */
1752         static u16 ibm_keycode_map[] __initdata = {
1753                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1754                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1755                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1756                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1757
1758                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1759                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1760                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1761                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1762
1763                 /* brightness: firmware always reacts to them, unless
1764                  * X.org did some tricks in the radeon BIOS scratch
1765                  * registers of *some* models */
1766                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1767                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1768
1769                 /* Thinklight: firmware always react to it */
1770                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1771
1772                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1773                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1774
1775                 /* Volume: firmware always react to it and reprograms
1776                  * the built-in *extra* mixer.  Never map it to control
1777                  * another mixer by default. */
1778                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1779                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1780                 KEY_RESERVED,   /* 0x16: MUTE */
1781
1782                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1783
1784                 /* (assignments unknown, please report if found) */
1785                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1786                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1787         };
1788         static u16 lenovo_keycode_map[] __initdata = {
1789                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1790                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1791                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1792                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1793
1794                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1795                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1796                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1797                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1798
1799                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1800                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1801
1802                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1803
1804                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1805                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1806
1807                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1808                  * react to it and reprograms the built-in *extra* mixer.
1809                  * Never map it to control another mixer by default.
1810                  *
1811                  * T60?, T61, R60?, R61: firmware and EC tries to send
1812                  * these over the regular keyboard, so these are no-ops,
1813                  * but there are still weird bugs re. MUTE, so do not
1814                  * change unless you get test reports from all Lenovo
1815                  * models.  May cause the BIOS to interfere with the
1816                  * HDA mixer.
1817                  */
1818                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1819                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1820                 KEY_RESERVED,   /* 0x16: MUTE */
1821
1822                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1823
1824                 /* (assignments unknown, please report if found) */
1825                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1826                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1827         };
1828
1829 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1830 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1831 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1832
1833         int res, i;
1834         int status;
1835         int hkeyv;
1836
1837         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1838
1839         BUG_ON(!tpacpi_inputdev);
1840         BUG_ON(tpacpi_inputdev->open != NULL ||
1841                tpacpi_inputdev->close != NULL);
1842
1843         TPACPI_ACPIHANDLE_INIT(hkey);
1844         mutex_init(&hotkey_mutex);
1845
1846 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1847         mutex_init(&hotkey_thread_mutex);
1848         mutex_init(&hotkey_thread_data_mutex);
1849 #endif
1850
1851         /* hotkey not supported on 570 */
1852         tp_features.hotkey = hkey_handle != NULL;
1853
1854         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1855                 str_supported(tp_features.hotkey));
1856
1857         if (tp_features.hotkey) {
1858                 hotkey_dev_attributes = create_attr_set(12, NULL);
1859                 if (!hotkey_dev_attributes)
1860                         return -ENOMEM;
1861                 res = add_many_to_attr_set(hotkey_dev_attributes,
1862                                 hotkey_attributes,
1863                                 ARRAY_SIZE(hotkey_attributes));
1864                 if (res)
1865                         return res;
1866
1867                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1868                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1869                    for HKEY interface version 0x100 */
1870                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1871                         if ((hkeyv >> 8) != 1) {
1872                                 printk(TPACPI_ERR "unknown version of the "
1873                                        "HKEY interface: 0x%x\n", hkeyv);
1874                                 printk(TPACPI_ERR "please report this to %s\n",
1875                                        TPACPI_MAIL);
1876                         } else {
1877                                 /*
1878                                  * MHKV 0x100 in A31, R40, R40e,
1879                                  * T4x, X31, and later
1880                                  */
1881                                 tp_features.hotkey_mask = 1;
1882                         }
1883                 }
1884
1885                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1886                         str_supported(tp_features.hotkey_mask));
1887
1888                 if (tp_features.hotkey_mask) {
1889                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1890                                         "MHKA", "qd")) {
1891                                 printk(TPACPI_ERR
1892                                        "missing MHKA handler, "
1893                                        "please report this to %s\n",
1894                                        TPACPI_MAIL);
1895                                 /* FN+F12, FN+F4, FN+F3 */
1896                                 hotkey_all_mask = 0x080cU;
1897                         }
1898                 }
1899
1900                 /* hotkey_source_mask *must* be zero for
1901                  * the first hotkey_mask_get */
1902                 res = hotkey_status_get(&hotkey_orig_status);
1903                 if (!res && tp_features.hotkey_mask) {
1904                         res = hotkey_mask_get();
1905                         hotkey_orig_mask = hotkey_mask;
1906                         if (!res) {
1907                                 res = add_many_to_attr_set(
1908                                         hotkey_dev_attributes,
1909                                         hotkey_mask_attributes,
1910                                         ARRAY_SIZE(hotkey_mask_attributes));
1911                         }
1912                 }
1913
1914 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1915                 if (tp_features.hotkey_mask) {
1916                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
1917                                                 & ~hotkey_all_mask;
1918                 } else {
1919                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
1920                 }
1921
1922                 vdbg_printk(TPACPI_DBG_INIT,
1923                             "hotkey source mask 0x%08x, polling freq %d\n",
1924                             hotkey_source_mask, hotkey_poll_freq);
1925 #endif
1926
1927                 /* Not all thinkpads have a hardware radio switch */
1928                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1929                         tp_features.hotkey_wlsw = 1;
1930                         printk(TPACPI_INFO
1931                                 "radio switch found; radios are %s\n",
1932                                 enabled(status, 0));
1933                         res = add_to_attr_set(hotkey_dev_attributes,
1934                                         &dev_attr_hotkey_radio_sw.attr);
1935                 }
1936
1937                 if (!res)
1938                         res = register_attr_set_with_sysfs(
1939                                         hotkey_dev_attributes,
1940                                         &tpacpi_pdev->dev.kobj);
1941                 if (res)
1942                         return res;
1943
1944                 /* Set up key map */
1945
1946                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1947                                                 GFP_KERNEL);
1948                 if (!hotkey_keycode_map) {
1949                         printk(TPACPI_ERR
1950                                 "failed to allocate memory for key map\n");
1951                         return -ENOMEM;
1952                 }
1953
1954                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1955                         dbg_printk(TPACPI_DBG_INIT,
1956                                    "using Lenovo default hot key map\n");
1957                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1958                                 TPACPI_HOTKEY_MAP_SIZE);
1959                 } else {
1960                         dbg_printk(TPACPI_DBG_INIT,
1961                                    "using IBM default hot key map\n");
1962                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1963                                 TPACPI_HOTKEY_MAP_SIZE);
1964                 }
1965
1966                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1967                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1968                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1969                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1970                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1971                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1972                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1973                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1974                                 set_bit(hotkey_keycode_map[i],
1975                                         tpacpi_inputdev->keybit);
1976                         } else {
1977                                 if (i < sizeof(hotkey_reserved_mask)*8)
1978                                         hotkey_reserved_mask |= 1 << i;
1979                         }
1980                 }
1981
1982                 if (tp_features.hotkey_wlsw) {
1983                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1984                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1985                 }
1986
1987                 dbg_printk(TPACPI_DBG_INIT,
1988                                 "enabling hot key handling\n");
1989                 res = hotkey_status_set(1);
1990                 if (res)
1991                         return res;
1992                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
1993                                         & ~hotkey_reserved_mask)
1994                                         | hotkey_orig_mask);
1995                 if (res < 0 && res != -ENXIO)
1996                         return res;
1997
1998                 dbg_printk(TPACPI_DBG_INIT,
1999                                 "legacy hot key reporting over procfs %s\n",
2000                                 (hotkey_report_mode < 2) ?
2001                                         "enabled" : "disabled");
2002
2003 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2004                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2005                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2006
2007                 hotkey_poll_setup_safe(1);
2008 #endif
2009         }
2010
2011         return (tp_features.hotkey)? 0 : 1;
2012 }
2013
2014 static void hotkey_exit(void)
2015 {
2016 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2017         hotkey_poll_stop_sync();
2018 #endif
2019
2020         if (tp_features.hotkey) {
2021                 dbg_printk(TPACPI_DBG_EXIT,
2022                            "restoring original hot key mask\n");
2023                 /* no short-circuit boolean operator below! */
2024                 if ((hotkey_mask_set(hotkey_orig_mask) |
2025                      hotkey_status_set(hotkey_orig_status)) != 0)
2026                         printk(TPACPI_ERR
2027                                "failed to restore hot key mask "
2028                                "to BIOS defaults\n");
2029         }
2030
2031         if (hotkey_dev_attributes) {
2032                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2033                 hotkey_dev_attributes = NULL;
2034         }
2035 }
2036
2037 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2038 {
2039         u32 hkey;
2040         unsigned int scancode;
2041         int send_acpi_ev;
2042         int ignore_acpi_ev;
2043         int unk_ev;
2044
2045         if (event != 0x80) {
2046                 printk(TPACPI_ERR
2047                        "unknown HKEY notification event %d\n", event);
2048                 /* forward it to userspace, maybe it knows how to handle it */
2049                 acpi_bus_generate_netlink_event(
2050                                         ibm->acpi->device->pnp.device_class,
2051                                         ibm->acpi->device->dev.bus_id,
2052                                         event, 0);
2053                 return;
2054         }
2055
2056         while (1) {
2057                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2058                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2059                         return;
2060                 }
2061
2062                 if (hkey == 0) {
2063                         /* queue empty */
2064                         return;
2065                 }
2066
2067                 send_acpi_ev = 1;
2068                 ignore_acpi_ev = 0;
2069                 unk_ev = 0;
2070
2071                 switch (hkey >> 12) {
2072                 case 1:
2073                         /* 0x1000-0x1FFF: key presses */
2074                         scancode = hkey & 0xfff;
2075                         if (scancode > 0 && scancode < 0x21) {
2076                                 scancode--;
2077                                 if (!(hotkey_source_mask & (1 << scancode))) {
2078                                         tpacpi_input_send_key(scancode);
2079                                         send_acpi_ev = 0;
2080                                 } else {
2081                                         ignore_acpi_ev = 1;
2082                                 }
2083                         } else {
2084                                 unk_ev = 1;
2085                         }
2086                         break;
2087                 case 2:
2088                         /* Wakeup reason */
2089                         switch (hkey) {
2090                         case 0x2304: /* suspend, undock */
2091                         case 0x2404: /* hibernation, undock */
2092                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2093                                 ignore_acpi_ev = 1;
2094                                 break;
2095                         case 0x2305: /* suspend, bay eject */
2096                         case 0x2405: /* hibernation, bay eject */
2097                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2098                                 ignore_acpi_ev = 1;
2099                                 break;
2100                         default:
2101                                 unk_ev = 1;
2102                         }
2103                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2104                                 printk(TPACPI_INFO
2105                                        "woke up due to a hot-unplug "
2106                                        "request...\n");
2107                         }
2108                         break;
2109                 case 3:
2110                         /* bay-related wakeups */
2111                         if (hkey == 0x3003) {
2112                                 hotkey_autosleep_ack = 1;
2113                                 printk(TPACPI_INFO
2114                                        "bay ejected\n");
2115                         } else {
2116                                 unk_ev = 1;
2117                         }
2118                         break;
2119                 case 4:
2120                         /* dock-related wakeups */
2121                         if (hkey == 0x4003) {
2122                                 hotkey_autosleep_ack = 1;
2123                                 printk(TPACPI_INFO
2124                                        "undocked\n");
2125                         } else {
2126                                 unk_ev = 1;
2127                         }
2128                         break;
2129                 case 5:
2130                         /* 0x5000-0x5FFF: human interface helpers */
2131                         switch (hkey) {
2132                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2133                         case 0x5009: /* X61t: swivel up (tablet mode) */
2134                         case 0x500a: /* X61t: swivel down (normal mode) */
2135                         case 0x500b: /* X61t: tablet pen inserted into bay */
2136                         case 0x500c: /* X61t: tablet pen removed from bay */
2137                                 break;
2138                         case 0x5001:
2139                         case 0x5002:
2140                                 /* LID switch events.  Do not propagate */
2141                                 ignore_acpi_ev = 1;
2142                                 break;
2143                         default:
2144                                 unk_ev = 1;
2145                         }
2146                         break;
2147                 case 7:
2148                         /* 0x7000-0x7FFF: misc */
2149                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2150                                 tpacpi_input_send_radiosw();
2151                                 send_acpi_ev = 0;
2152                                 break;
2153                         }
2154                         /* fallthrough to default */
2155                 default:
2156                         unk_ev = 1;
2157                 }
2158                 if (unk_ev) {
2159                         printk(TPACPI_NOTICE
2160                                "unhandled HKEY event 0x%04x\n", hkey);
2161                 }
2162
2163                 /* Legacy events */
2164                 if (!ignore_acpi_ev &&
2165                     (send_acpi_ev || hotkey_report_mode < 2)) {
2166                         acpi_bus_generate_proc_event(ibm->acpi->device,
2167                                                      event, hkey);
2168                 }
2169
2170                 /* netlink events */
2171                 if (!ignore_acpi_ev && send_acpi_ev) {
2172                         acpi_bus_generate_netlink_event(
2173                                         ibm->acpi->device->pnp.device_class,
2174                                         ibm->acpi->device->dev.bus_id,
2175                                         event, hkey);
2176                 }
2177         }
2178 }
2179
2180 static void hotkey_suspend(pm_message_t state)
2181 {
2182         /* Do these on suspend, we get the events on early resume! */
2183         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2184         hotkey_autosleep_ack = 0;
2185 }
2186
2187 static void hotkey_resume(void)
2188 {
2189         if (hotkey_mask_get())
2190                 printk(TPACPI_ERR
2191                        "error while trying to read hot key mask "
2192                        "from firmware\n");
2193         tpacpi_input_send_radiosw();
2194 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2195         hotkey_poll_setup_safe(0);
2196 #endif
2197 }
2198
2199 /* procfs -------------------------------------------------------------- */
2200 static int hotkey_read(char *p)
2201 {
2202         int res, status;
2203         int len = 0;
2204
2205         if (!tp_features.hotkey) {
2206                 len += sprintf(p + len, "status:\t\tnot supported\n");
2207                 return len;
2208         }
2209
2210         if (mutex_lock_interruptible(&hotkey_mutex))
2211                 return -ERESTARTSYS;
2212         res = hotkey_status_get(&status);
2213         if (!res)
2214                 res = hotkey_mask_get();
2215         mutex_unlock(&hotkey_mutex);
2216         if (res)
2217                 return res;
2218
2219         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2220         if (tp_features.hotkey_mask) {
2221                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2222                 len += sprintf(p + len,
2223                                "commands:\tenable, disable, reset, <mask>\n");
2224         } else {
2225                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2226                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2227         }
2228
2229         return len;
2230 }
2231
2232 static int hotkey_write(char *buf)
2233 {
2234         int res, status;
2235         u32 mask;
2236         char *cmd;
2237
2238         if (!tp_features.hotkey)
2239                 return -ENODEV;
2240
2241         if (mutex_lock_interruptible(&hotkey_mutex))
2242                 return -ERESTARTSYS;
2243
2244         status = -1;
2245         mask = hotkey_mask;
2246
2247         res = 0;
2248         while ((cmd = next_cmd(&buf))) {
2249                 if (strlencmp(cmd, "enable") == 0) {
2250                         status = 1;
2251                 } else if (strlencmp(cmd, "disable") == 0) {
2252                         status = 0;
2253                 } else if (strlencmp(cmd, "reset") == 0) {
2254                         status = hotkey_orig_status;
2255                         mask = hotkey_orig_mask;
2256                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2257                         /* mask set */
2258                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2259                         /* mask set */
2260                 } else {
2261                         res = -EINVAL;
2262                         goto errexit;
2263                 }
2264         }
2265         if (status != -1)
2266                 res = hotkey_status_set(status);
2267
2268         if (!res && mask != hotkey_mask)
2269                 res = hotkey_mask_set(mask);
2270
2271 errexit:
2272         mutex_unlock(&hotkey_mutex);
2273         return res;
2274 }
2275
2276 static const struct acpi_device_id ibm_htk_device_ids[] = {
2277         {TPACPI_ACPI_HKEY_HID, 0},
2278         {"", 0},
2279 };
2280
2281 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2282         .hid = ibm_htk_device_ids,
2283         .notify = hotkey_notify,
2284         .handle = &hkey_handle,
2285         .type = ACPI_DEVICE_NOTIFY,
2286 };
2287
2288 static struct ibm_struct hotkey_driver_data = {
2289         .name = "hotkey",
2290         .read = hotkey_read,
2291         .write = hotkey_write,
2292         .exit = hotkey_exit,
2293         .resume = hotkey_resume,
2294         .suspend = hotkey_suspend,
2295         .acpi = &ibm_hotkey_acpidriver,
2296 };
2297
2298 /*************************************************************************
2299  * Bluetooth subdriver
2300  */
2301
2302 enum {
2303         /* ACPI GBDC/SBDC bits */
2304         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2305         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2306         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2307 };
2308
2309 static int bluetooth_get_radiosw(void);
2310 static int bluetooth_set_radiosw(int radio_on);
2311
2312 /* sysfs bluetooth enable ---------------------------------------------- */
2313 static ssize_t bluetooth_enable_show(struct device *dev,
2314                            struct device_attribute *attr,
2315                            char *buf)
2316 {
2317         int status;
2318
2319         status = bluetooth_get_radiosw();
2320         if (status < 0)
2321                 return status;
2322
2323         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2324 }
2325
2326 static ssize_t bluetooth_enable_store(struct device *dev,
2327                             struct device_attribute *attr,
2328                             const char *buf, size_t count)
2329 {
2330         unsigned long t;
2331         int res;
2332
2333         if (parse_strtoul(buf, 1, &t))
2334                 return -EINVAL;
2335
2336         res = bluetooth_set_radiosw(t);
2337
2338         return (res) ? res : count;
2339 }
2340
2341 static struct device_attribute dev_attr_bluetooth_enable =
2342         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2343                 bluetooth_enable_show, bluetooth_enable_store);
2344
2345 /* --------------------------------------------------------------------- */
2346
2347 static struct attribute *bluetooth_attributes[] = {
2348         &dev_attr_bluetooth_enable.attr,
2349         NULL
2350 };
2351
2352 static const struct attribute_group bluetooth_attr_group = {
2353         .attrs = bluetooth_attributes,
2354 };
2355
2356 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2357 {
2358         int res;
2359         int status = 0;
2360
2361         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2362
2363         TPACPI_ACPIHANDLE_INIT(hkey);
2364
2365         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2366            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2367         tp_features.bluetooth = hkey_handle &&
2368             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2369
2370         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2371                 str_supported(tp_features.bluetooth),
2372                 status);
2373
2374         if (tp_features.bluetooth) {
2375                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2376                         /* no bluetooth hardware present in system */
2377                         tp_features.bluetooth = 0;
2378                         dbg_printk(TPACPI_DBG_INIT,
2379                                    "bluetooth hardware not installed\n");
2380                 } else {
2381                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2382                                         &bluetooth_attr_group);
2383                         if (res)
2384                                 return res;
2385                 }
2386         }
2387
2388         return (tp_features.bluetooth)? 0 : 1;
2389 }
2390
2391 static void bluetooth_exit(void)
2392 {
2393         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2394                         &bluetooth_attr_group);
2395 }
2396
2397 static int bluetooth_get_radiosw(void)
2398 {
2399         int status;
2400
2401         if (!tp_features.bluetooth)
2402                 return -ENODEV;
2403
2404         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2405                 return -EIO;
2406
2407         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2408 }
2409
2410 static int bluetooth_set_radiosw(int radio_on)
2411 {
2412         int status;
2413
2414         if (!tp_features.bluetooth)
2415                 return -ENODEV;
2416
2417         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2418                 return -EIO;
2419         if (radio_on)
2420                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2421         else
2422                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2423         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2424                 return -EIO;
2425
2426         return 0;
2427 }
2428
2429 /* procfs -------------------------------------------------------------- */
2430 static int bluetooth_read(char *p)
2431 {
2432         int len = 0;
2433         int status = bluetooth_get_radiosw();
2434
2435         if (!tp_features.bluetooth)
2436                 len += sprintf(p + len, "status:\t\tnot supported\n");
2437         else {
2438                 len += sprintf(p + len, "status:\t\t%s\n",
2439                                 (status)? "enabled" : "disabled");
2440                 len += sprintf(p + len, "commands:\tenable, disable\n");
2441         }
2442
2443         return len;
2444 }
2445
2446 static int bluetooth_write(char *buf)
2447 {
2448         char *cmd;
2449
2450         if (!tp_features.bluetooth)
2451                 return -ENODEV;
2452
2453         while ((cmd = next_cmd(&buf))) {
2454                 if (strlencmp(cmd, "enable") == 0) {
2455                         bluetooth_set_radiosw(1);
2456                 } else if (strlencmp(cmd, "disable") == 0) {
2457                         bluetooth_set_radiosw(0);
2458                 } else
2459                         return -EINVAL;
2460         }
2461
2462         return 0;
2463 }
2464
2465 static struct ibm_struct bluetooth_driver_data = {
2466         .name = "bluetooth",
2467         .read = bluetooth_read,
2468         .write = bluetooth_write,
2469         .exit = bluetooth_exit,
2470 };
2471
2472 /*************************************************************************
2473  * Wan subdriver
2474  */
2475
2476 enum {
2477         /* ACPI GWAN/SWAN bits */
2478         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2479         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2480         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2481 };
2482
2483 static int wan_get_radiosw(void);
2484 static int wan_set_radiosw(int radio_on);
2485
2486 /* sysfs wan enable ---------------------------------------------------- */
2487 static ssize_t wan_enable_show(struct device *dev,
2488                            struct device_attribute *attr,
2489                            char *buf)
2490 {
2491         int status;
2492
2493         status = wan_get_radiosw();
2494         if (status < 0)
2495                 return status;
2496
2497         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2498 }
2499
2500 static ssize_t wan_enable_store(struct device *dev,
2501                             struct device_attribute *attr,
2502                             const char *buf, size_t count)
2503 {
2504         unsigned long t;
2505         int res;
2506
2507         if (parse_strtoul(buf, 1, &t))
2508                 return -EINVAL;
2509
2510         res = wan_set_radiosw(t);
2511
2512         return (res) ? res : count;
2513 }
2514
2515 static struct device_attribute dev_attr_wan_enable =
2516         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2517                 wan_enable_show, wan_enable_store);
2518
2519 /* --------------------------------------------------------------------- */
2520
2521 static struct attribute *wan_attributes[] = {
2522         &dev_attr_wan_enable.attr,
2523         NULL
2524 };
2525
2526 static const struct attribute_group wan_attr_group = {
2527         .attrs = wan_attributes,
2528 };
2529
2530 static int __init wan_init(struct ibm_init_struct *iibm)
2531 {
2532         int res;
2533         int status = 0;
2534
2535         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2536
2537         TPACPI_ACPIHANDLE_INIT(hkey);
2538
2539         tp_features.wan = hkey_handle &&
2540             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2541
2542         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2543                 str_supported(tp_features.wan),
2544                 status);
2545
2546         if (tp_features.wan) {
2547                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2548                         /* no wan hardware present in system */
2549                         tp_features.wan = 0;
2550                         dbg_printk(TPACPI_DBG_INIT,
2551                                    "wan hardware not installed\n");
2552                 } else {
2553                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2554                                         &wan_attr_group);
2555                         if (res)
2556                                 return res;
2557                 }
2558         }
2559
2560         return (tp_features.wan)? 0 : 1;
2561 }
2562
2563 static void wan_exit(void)
2564 {
2565         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2566                 &wan_attr_group);
2567 }
2568
2569 static int wan_get_radiosw(void)
2570 {
2571         int status;
2572
2573         if (!tp_features.wan)
2574                 return -ENODEV;
2575
2576         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2577                 return -EIO;
2578
2579         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2580 }
2581
2582 static int wan_set_radiosw(int radio_on)
2583 {
2584         int status;
2585
2586         if (!tp_features.wan)
2587                 return -ENODEV;
2588
2589         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2590                 return -EIO;
2591         if (radio_on)
2592                 status |= TP_ACPI_WANCARD_RADIOSSW;
2593         else
2594                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2595         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2596                 return -EIO;
2597
2598         return 0;
2599 }
2600
2601 /* procfs -------------------------------------------------------------- */
2602 static int wan_read(char *p)
2603 {
2604         int len = 0;
2605         int status = wan_get_radiosw();
2606
2607         if (!tp_features.wan)
2608                 len += sprintf(p + len, "status:\t\tnot supported\n");
2609         else {
2610                 len += sprintf(p + len, "status:\t\t%s\n",
2611                                 (status)? "enabled" : "disabled");
2612                 len += sprintf(p + len, "commands:\tenable, disable\n");
2613         }
2614
2615         return len;
2616 }
2617
2618 static int wan_write(char *buf)
2619 {
2620         char *cmd;
2621
2622         if (!tp_features.wan)
2623                 return -ENODEV;
2624
2625         while ((cmd = next_cmd(&buf))) {
2626                 if (strlencmp(cmd, "enable") == 0) {
2627                         wan_set_radiosw(1);
2628                 } else if (strlencmp(cmd, "disable") == 0) {
2629                         wan_set_radiosw(0);
2630                 } else
2631                         return -EINVAL;
2632         }
2633
2634         return 0;
2635 }
2636
2637 static struct ibm_struct wan_driver_data = {
2638         .name = "wan",
2639         .read = wan_read,
2640         .write = wan_write,
2641         .exit = wan_exit,
2642         .flags.experimental = 1,
2643 };
2644
2645 /*************************************************************************
2646  * Video subdriver
2647  */
2648
2649 enum video_access_mode {
2650         TPACPI_VIDEO_NONE = 0,
2651         TPACPI_VIDEO_570,       /* 570 */
2652         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2653         TPACPI_VIDEO_NEW,       /* all others */
2654 };
2655
2656 enum {  /* video status flags, based on VIDEO_570 */
2657         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2658         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2659         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2660 };
2661
2662 enum {  /* TPACPI_VIDEO_570 constants */
2663         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2664         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2665                                                  * video_status_flags */
2666         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2667         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2668 };
2669
2670 static enum video_access_mode video_supported;
2671 static int video_orig_autosw;
2672
2673 static int video_autosw_get(void);
2674 static int video_autosw_set(int enable);
2675
2676 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
2677            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
2678            "\\_SB.PCI0.VID0",   /* 770e */
2679            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
2680            "\\_SB.PCI0.AGP.VID",        /* all others */
2681            );                           /* R30, R31 */
2682
2683 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2684
2685 static int __init video_init(struct ibm_init_struct *iibm)
2686 {
2687         int ivga;
2688
2689         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2690
2691         TPACPI_ACPIHANDLE_INIT(vid);
2692         TPACPI_ACPIHANDLE_INIT(vid2);
2693
2694         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2695                 /* G41, assume IVGA doesn't change */
2696                 vid_handle = vid2_handle;
2697
2698         if (!vid_handle)
2699                 /* video switching not supported on R30, R31 */
2700                 video_supported = TPACPI_VIDEO_NONE;
2701         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2702                 /* 570 */
2703                 video_supported = TPACPI_VIDEO_570;
2704         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2705                 /* 600e/x, 770e, 770x */
2706                 video_supported = TPACPI_VIDEO_770;
2707         else
2708                 /* all others */
2709                 video_supported = TPACPI_VIDEO_NEW;
2710
2711         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2712                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2713                 video_supported);
2714
2715         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2716 }
2717
2718 static void video_exit(void)
2719 {
2720         dbg_printk(TPACPI_DBG_EXIT,
2721                    "restoring original video autoswitch mode\n");
2722         if (video_autosw_set(video_orig_autosw))
2723                 printk(TPACPI_ERR "error while trying to restore original "
2724                         "video autoswitch mode\n");
2725 }
2726
2727 static int video_outputsw_get(void)
2728 {
2729         int status = 0;
2730         int i;
2731
2732         switch (video_supported) {
2733         case TPACPI_VIDEO_570:
2734                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2735                                  TP_ACPI_VIDEO_570_PHSCMD))
2736                         return -EIO;
2737                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2738                 break;
2739         case TPACPI_VIDEO_770:
2740                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2741                         return -EIO;
2742                 if (i)
2743                         status |= TP_ACPI_VIDEO_S_LCD;
2744                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2745                         return -EIO;
2746                 if (i)
2747                         status |= TP_ACPI_VIDEO_S_CRT;
2748                 break;
2749         case TPACPI_VIDEO_NEW:
2750                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2751                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2752                         return -EIO;
2753                 if (i)
2754                         status |= TP_ACPI_VIDEO_S_CRT;
2755
2756                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2757                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2758                         return -EIO;
2759                 if (i)
2760                         status |= TP_ACPI_VIDEO_S_LCD;
2761                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2762                         return -EIO;
2763                 if (i)
2764                         status |= TP_ACPI_VIDEO_S_DVI;
2765                 break;
2766         default:
2767                 return -ENOSYS;
2768         }
2769
2770         return status;
2771 }
2772
2773 static int video_outputsw_set(int status)
2774 {
2775         int autosw;
2776         int res = 0;
2777
2778         switch (video_supported) {
2779         case TPACPI_VIDEO_570:
2780                 res = acpi_evalf(NULL, NULL,
2781                                  "\\_SB.PHS2", "vdd",
2782                                  TP_ACPI_VIDEO_570_PHS2CMD,
2783                                  status | TP_ACPI_VIDEO_570_PHS2SET);
2784                 break;
2785         case TPACPI_VIDEO_770:
2786                 autosw = video_autosw_get();
2787                 if (autosw < 0)
2788                         return autosw;
2789
2790                 res = video_autosw_set(1);
2791                 if (res)
2792                         return res;
2793                 res = acpi_evalf(vid_handle, NULL,
2794                                  "ASWT", "vdd", status * 0x100, 0);
2795                 if (!autosw && video_autosw_set(autosw)) {
2796                         printk(TPACPI_ERR
2797                                "video auto-switch left enabled due to error\n");
2798                         return -EIO;
2799                 }
2800                 break;
2801         case TPACPI_VIDEO_NEW:
2802                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2803                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2804                 break;
2805         default:
2806                 return -ENOSYS;
2807         }
2808
2809         return (res)? 0 : -EIO;
2810 }
2811
2812 static int video_autosw_get(void)
2813 {
2814         int autosw = 0;
2815
2816         switch (video_supported) {
2817         case TPACPI_VIDEO_570:
2818                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2819                         return -EIO;
2820                 break;
2821         case TPACPI_VIDEO_770:
2822         case TPACPI_VIDEO_NEW:
2823                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2824                         return -EIO;
2825                 break;
2826         default:
2827                 return -ENOSYS;
2828         }
2829
2830         return autosw & 1;
2831 }
2832
2833 static int video_autosw_set(int enable)
2834 {
2835         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2836                 return -EIO;
2837         return 0;
2838 }
2839
2840 static int video_outputsw_cycle(void)
2841 {
2842         int autosw = video_autosw_get();
2843         int res;
2844
2845         if (autosw < 0)
2846                 return autosw;
2847
2848         switch (video_supported) {
2849         case TPACPI_VIDEO_570:
2850                 res = video_autosw_set(1);
2851                 if (res)
2852                         return res;
2853                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2854                 break;
2855         case TPACPI_VIDEO_770:
2856         case TPACPI_VIDEO_NEW:
2857                 res = video_autosw_set(1);
2858                 if (res)
2859                         return res;
2860                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2861                 break;
2862         default:
2863                 return -ENOSYS;
2864         }
2865         if (!autosw && video_autosw_set(autosw)) {
2866                 printk(TPACPI_ERR
2867                        "video auto-switch left enabled due to error\n");
2868                 return -EIO;
2869         }
2870
2871         return (res)? 0 : -EIO;
2872 }
2873
2874 static int video_expand_toggle(void)
2875 {
2876         switch (video_supported) {
2877         case TPACPI_VIDEO_570:
2878                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2879                         0 : -EIO;
2880         case TPACPI_VIDEO_770:
2881                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2882                         0 : -EIO;
2883         case TPACPI_VIDEO_NEW:
2884                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2885                         0 : -EIO;
2886         default:
2887                 return -ENOSYS;
2888         }
2889         /* not reached */
2890 }
2891
2892 static int video_read(char *p)
2893 {
2894         int status, autosw;
2895         int len = 0;
2896
2897         if (video_supported == TPACPI_VIDEO_NONE) {
2898                 len += sprintf(p + len, "status:\t\tnot supported\n");
2899                 return len;
2900         }
2901
2902         status = video_outputsw_get();
2903         if (status < 0)
2904                 return status;
2905
2906         autosw = video_autosw_get();
2907         if (autosw < 0)
2908                 return autosw;
2909
2910         len += sprintf(p + len, "status:\t\tsupported\n");
2911         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
2912         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2913         if (video_supported == TPACPI_VIDEO_NEW)
2914                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2915         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2916         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2917         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2918         if (video_supported == TPACPI_VIDEO_NEW)
2919                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2920         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2921         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2922
2923         return len;
2924 }
2925
2926 static int video_write(char *buf)
2927 {
2928         char *cmd;
2929         int enable, disable, status;
2930         int res;
2931
2932         if (video_supported == TPACPI_VIDEO_NONE)
2933                 return -ENODEV;
2934
2935         enable = 0;
2936         disable = 0;
2937
2938         while ((cmd = next_cmd(&buf))) {
2939                 if (strlencmp(cmd, "lcd_enable") == 0) {
2940                         enable |= TP_ACPI_VIDEO_S_LCD;
2941                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2942                         disable |= TP_ACPI_VIDEO_S_LCD;
2943                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2944                         enable |= TP_ACPI_VIDEO_S_CRT;
2945                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2946                         disable |= TP_ACPI_VIDEO_S_CRT;
2947                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2948                            strlencmp(cmd, "dvi_enable") == 0) {
2949                         enable |= TP_ACPI_VIDEO_S_DVI;
2950                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2951                            strlencmp(cmd, "dvi_disable") == 0) {
2952                         disable |= TP_ACPI_VIDEO_S_DVI;
2953                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2954                         res = video_autosw_set(1);
2955                         if (res)
2956                                 return res;
2957                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2958                         res = video_autosw_set(0);
2959                         if (res)
2960                                 return res;
2961                 } else if (strlencmp(cmd, "video_switch") == 0) {
2962                         res = video_outputsw_cycle();
2963                         if (res)
2964                                 return res;
2965                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2966                         res = video_expand_toggle();
2967                         if (res)
2968                                 return res;
2969                 } else
2970                         return -EINVAL;
2971         }
2972
2973         if (enable || disable) {
2974                 status = video_outputsw_get();
2975                 if (status < 0)
2976                         return status;
2977                 res = video_outputsw_set((status & ~disable) | enable);
2978                 if (res)
2979                         return res;
2980         }
2981
2982         return 0;
2983 }
2984
2985 static struct ibm_struct video_driver_data = {
2986         .name = "video",
2987         .read = video_read,
2988         .write = video_write,
2989         .exit = video_exit,
2990 };
2991
2992 /*************************************************************************
2993  * Light (thinklight) subdriver
2994  */
2995
2996 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
2997 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
2998
2999 static int __init light_init(struct ibm_init_struct *iibm)
3000 {
3001         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3002
3003         TPACPI_ACPIHANDLE_INIT(ledb);
3004         TPACPI_ACPIHANDLE_INIT(lght);
3005         TPACPI_ACPIHANDLE_INIT(cmos);
3006
3007         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3008         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3009
3010         if (tp_features.light)
3011                 /* light status not supported on
3012                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3013                 tp_features.light_status =
3014                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3015
3016         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3017                 str_supported(tp_features.light));
3018
3019         return (tp_features.light)? 0 : 1;
3020 }
3021
3022 static int light_read(char *p)
3023 {
3024         int len = 0;
3025         int status = 0;
3026
3027         if (!tp_features.light) {
3028                 len += sprintf(p + len, "status:\t\tnot supported\n");
3029         } else if (!tp_features.light_status) {
3030                 len += sprintf(p + len, "status:\t\tunknown\n");
3031                 len += sprintf(p + len, "commands:\ton, off\n");
3032         } else {
3033                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3034                         return -EIO;
3035                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3036                 len += sprintf(p + len, "commands:\ton, off\n");
3037         }
3038
3039         return len;
3040 }
3041
3042 static int light_write(char *buf)
3043 {
3044         int cmos_cmd, lght_cmd;
3045         char *cmd;
3046         int success;
3047
3048         if (!tp_features.light)
3049                 return -ENODEV;
3050
3051         while ((cmd = next_cmd(&buf))) {
3052                 if (strlencmp(cmd, "on") == 0) {
3053                         cmos_cmd = 0x0c;
3054                         lght_cmd = 1;
3055                 } else if (strlencmp(cmd, "off") == 0) {
3056                         cmos_cmd = 0x0d;
3057                         lght_cmd = 0;
3058                 } else
3059                         return -EINVAL;
3060
3061                 success = cmos_handle ?
3062                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3063                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3064                 if (!success)
3065                         return -EIO;
3066         }
3067
3068         return 0;
3069 }
3070
3071 static struct ibm_struct light_driver_data = {
3072         .name = "light",
3073         .read = light_read,
3074         .write = light_write,
3075 };
3076
3077 /*************************************************************************
3078  * Dock subdriver
3079  */
3080
3081 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3082
3083 static void dock_notify(struct ibm_struct *ibm, u32 event);
3084 static int dock_read(char *p);
3085 static int dock_write(char *buf);
3086
3087 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3088            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3089            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3090            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3091     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3092
3093 /* don't list other alternatives as we install a notify handler on the 570 */
3094 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3095
3096 static const struct acpi_device_id ibm_pci_device_ids[] = {
3097         {PCI_ROOT_HID_STRING, 0},
3098         {"", 0},
3099 };
3100
3101 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3102         {
3103          .notify = dock_notify,
3104          .handle = &dock_handle,
3105          .type = ACPI_SYSTEM_NOTIFY,
3106         },
3107         {
3108         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3109          * We just use it to get notifications of dock hotplug
3110          * in very old thinkpads */
3111          .hid = ibm_pci_device_ids,
3112          .notify = dock_notify,
3113          .handle = &pci_handle,
3114          .type = ACPI_SYSTEM_NOTIFY,
3115         },
3116 };
3117
3118 static struct ibm_struct dock_driver_data[2] = {
3119         {
3120          .name = "dock",
3121          .read = dock_read,
3122          .write = dock_write,
3123          .acpi = &ibm_dock_acpidriver[0],
3124         },
3125         {
3126          .name = "dock",
3127          .acpi = &ibm_dock_acpidriver[1],
3128         },
3129 };
3130
3131 #define dock_docked() (_sta(dock_handle) & 1)
3132
3133 static int __init dock_init(struct ibm_init_struct *iibm)
3134 {
3135         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3136
3137         TPACPI_ACPIHANDLE_INIT(dock);
3138
3139         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3140                 str_supported(dock_handle != NULL));
3141
3142         return (dock_handle)? 0 : 1;
3143 }
3144
3145 static int __init dock_init2(struct ibm_init_struct *iibm)
3146 {
3147         int dock2_needed;
3148
3149         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3150
3151         if (dock_driver_data[0].flags.acpi_driver_registered &&
3152             dock_driver_data[0].flags.acpi_notify_installed) {
3153                 TPACPI_ACPIHANDLE_INIT(pci);
3154                 dock2_needed = (pci_handle != NULL);
3155                 vdbg_printk(TPACPI_DBG_INIT,
3156                             "dock PCI handler for the TP 570 is %s\n",
3157                             str_supported(dock2_needed));
3158         } else {
3159                 vdbg_printk(TPACPI_DBG_INIT,
3160                 "dock subdriver part 2 not required\n");
3161                 dock2_needed = 0;
3162         }
3163
3164         return (dock2_needed)? 0 : 1;
3165 }
3166
3167 static void dock_notify(struct ibm_struct *ibm, u32 event)
3168 {
3169         int docked = dock_docked();
3170         int pci = ibm->acpi->hid && ibm->acpi->device &&
3171                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3172         int data;
3173
3174         if (event == 1 && !pci) /* 570 */
3175                 data = 1;       /* button */
3176         else if (event == 1 && pci)     /* 570 */
3177                 data = 3;       /* dock */
3178         else if (event == 3 && docked)
3179                 data = 1;       /* button */
3180         else if (event == 3 && !docked)
3181                 data = 2;       /* undock */
3182         else if (event == 0 && docked)
3183                 data = 3;       /* dock */
3184         else {
3185                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3186                        event, _sta(dock_handle));
3187                 data = 0;       /* unknown */
3188         }
3189         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3190         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3191                                           ibm->acpi->device->dev.bus_id,
3192                                           event, data);
3193 }
3194
3195 static int dock_read(char *p)
3196 {
3197         int len = 0;
3198         int docked = dock_docked();
3199
3200         if (!dock_handle)
3201                 len += sprintf(p + len, "status:\t\tnot supported\n");
3202         else if (!docked)
3203                 len += sprintf(p + len, "status:\t\tundocked\n");
3204         else {
3205                 len += sprintf(p + len, "status:\t\tdocked\n");
3206                 len += sprintf(p + len, "commands:\tdock, undock\n");
3207         }
3208
3209         return len;
3210 }
3211
3212 static int dock_write(char *buf)
3213 {
3214         char *cmd;
3215
3216         if (!dock_docked())
3217                 return -ENODEV;
3218
3219         while ((cmd = next_cmd(&buf))) {
3220                 if (strlencmp(cmd, "undock") == 0) {
3221                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3222                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3223                                 return -EIO;
3224                 } else if (strlencmp(cmd, "dock") == 0) {
3225                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3226                                 return -EIO;
3227                 } else
3228                         return -EINVAL;
3229         }
3230
3231         return 0;
3232 }
3233
3234 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3235
3236 /*************************************************************************
3237  * Bay subdriver
3238  */
3239
3240 #ifdef CONFIG_THINKPAD_ACPI_BAY
3241
3242 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3243            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3244            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3245            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3246            );                           /* A21e, R30, R31 */
3247 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3248            "_EJ0",              /* all others */
3249            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3250 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3251            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3252            );                           /* all others */
3253 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3254            "_EJ0",                      /* 770x */
3255            );                           /* all others */
3256
3257 static int __init bay_init(struct ibm_init_struct *iibm)
3258 {
3259         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3260
3261         TPACPI_ACPIHANDLE_INIT(bay);
3262         if (bay_handle)
3263                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3264         TPACPI_ACPIHANDLE_INIT(bay2);
3265         if (bay2_handle)
3266                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3267
3268         tp_features.bay_status = bay_handle &&
3269                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3270         tp_features.bay_status2 = bay2_handle &&
3271                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3272
3273         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3274                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3275         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3276                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3277
3278         vdbg_printk(TPACPI_DBG_INIT,
3279                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3280                 str_supported(tp_features.bay_status),
3281                 str_supported(tp_features.bay_eject),
3282                 str_supported(tp_features.bay_status2),
3283                 str_supported(tp_features.bay_eject2));
3284
3285         return (tp_features.bay_status || tp_features.bay_eject ||
3286                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3287 }
3288
3289 static void bay_notify(struct ibm_struct *ibm, u32 event)
3290 {
3291         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3292         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3293                                           ibm->acpi->device->dev.bus_id,
3294                                           event, 0);
3295 }
3296
3297 #define bay_occupied(b) (_sta(b##_handle) & 1)
3298
3299 static int bay_read(char *p)
3300 {
3301         int len = 0;
3302         int occupied = bay_occupied(bay);
3303         int occupied2 = bay_occupied(bay2);
3304         int eject, eject2;
3305
3306         len += sprintf(p + len, "status:\t\t%s\n",
3307                 tp_features.bay_status ?
3308                         (occupied ? "occupied" : "unoccupied") :
3309                                 "not supported");
3310         if (tp_features.bay_status2)
3311                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3312                                "occupied" : "unoccupied");
3313
3314         eject = tp_features.bay_eject && occupied;
3315         eject2 = tp_features.bay_eject2 && occupied2;
3316
3317         if (eject && eject2)
3318                 len += sprintf(p + len, "commands:\teject, eject2\n");
3319         else if (eject)
3320                 len += sprintf(p + len, "commands:\teject\n");
3321         else if (eject2)
3322                 len += sprintf(p + len, "commands:\teject2\n");
3323
3324         return len;
3325 }
3326
3327 static int bay_write(char *buf)
3328 {
3329         char *cmd;
3330
3331         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3332                 return -ENODEV;
3333
3334         while ((cmd = next_cmd(&buf))) {
3335                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3336                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3337                                 return -EIO;
3338                 } else if (tp_features.bay_eject2 &&
3339                            strlencmp(cmd, "eject2") == 0) {
3340                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3341                                 return -EIO;
3342                 } else
3343                         return -EINVAL;
3344         }
3345
3346         return 0;
3347 }
3348
3349 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3350         .notify = bay_notify,
3351         .handle = &bay_handle,
3352         .type = ACPI_SYSTEM_NOTIFY,
3353 };
3354
3355 static struct ibm_struct bay_driver_data = {
3356         .name = "bay",
3357         .read = bay_read,
3358         .write = bay_write,
3359         .acpi = &ibm_bay_acpidriver,
3360 };
3361
3362 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3363
3364 /*************************************************************************
3365  * CMOS subdriver
3366  */
3367
3368 /* sysfs cmos_command -------------------------------------------------- */
3369 static ssize_t cmos_command_store(struct device *dev,
3370                             struct device_attribute *attr,
3371                             const char *buf, size_t count)
3372 {
3373         unsigned long cmos_cmd;
3374         int res;
3375
3376         if (parse_strtoul(buf, 21, &cmos_cmd))
3377                 return -EINVAL;
3378
3379         res = issue_thinkpad_cmos_command(cmos_cmd);
3380         return (res)? res : count;
3381 }
3382
3383 static struct device_attribute dev_attr_cmos_command =
3384         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3385
3386 /* --------------------------------------------------------------------- */
3387
3388 static int __init cmos_init(struct ibm_init_struct *iibm)
3389 {
3390         int res;
3391
3392         vdbg_printk(TPACPI_DBG_INIT,
3393                 "initializing cmos commands subdriver\n");
3394
3395         TPACPI_ACPIHANDLE_INIT(cmos);
3396
3397         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3398                 str_supported(cmos_handle != NULL));
3399
3400         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3401         if (res)
3402                 return res;
3403
3404         return (cmos_handle)? 0 : 1;
3405 }
3406
3407 static void cmos_exit(void)
3408 {
3409         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3410 }
3411
3412 static int cmos_read(char *p)
3413 {
3414         int len = 0;
3415
3416         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3417            R30, R31, T20-22, X20-21 */
3418         if (!cmos_handle)
3419                 len += sprintf(p + len, "status:\t\tnot supported\n");
3420         else {
3421                 len += sprintf(p + len, "status:\t\tsupported\n");
3422                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3423         }
3424
3425         return len;
3426 }
3427
3428 static int cmos_write(char *buf)
3429 {
3430         char *cmd;
3431         int cmos_cmd, res;
3432
3433         while ((cmd = next_cmd(&buf))) {
3434                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3435                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3436                         /* cmos_cmd set */
3437                 } else
3438                         return -EINVAL;
3439
3440                 res = issue_thinkpad_cmos_command(cmos_cmd);
3441                 if (res)
3442                         return res;
3443         }
3444
3445         return 0;
3446 }
3447
3448 static struct ibm_struct cmos_driver_data = {
3449         .name = "cmos",
3450         .read = cmos_read,
3451         .write = cmos_write,
3452         .exit = cmos_exit,
3453 };
3454
3455 /*************************************************************************
3456  * LED subdriver
3457  */
3458
3459 enum led_access_mode {
3460         TPACPI_LED_NONE = 0,
3461         TPACPI_LED_570, /* 570 */
3462         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3463         TPACPI_LED_NEW, /* all others */
3464 };
3465
3466 enum {  /* For TPACPI_LED_OLD */
3467         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3468         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3469         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3470 };
3471
3472 static enum led_access_mode led_supported;
3473
3474 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3475            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3476                                 /* T20-22, X20-21 */
3477            "LED",               /* all others */
3478            );                   /* R30, R31 */
3479
3480 static int __init led_init(struct ibm_init_struct *iibm)
3481 {
3482         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3483
3484         TPACPI_ACPIHANDLE_INIT(led);
3485
3486         if (!led_handle)
3487                 /* led not supported on R30, R31 */
3488                 led_supported = TPACPI_LED_NONE;
3489         else if (strlencmp(led_path, "SLED") == 0)
3490                 /* 570 */
3491                 led_supported = TPACPI_LED_570;
3492         else if (strlencmp(led_path, "SYSL") == 0)
3493                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3494                 led_supported = TPACPI_LED_OLD;
3495         else
3496                 /* all others */
3497                 led_supported = TPACPI_LED_NEW;
3498
3499         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3500                 str_supported(led_supported), led_supported);
3501
3502         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3503 }
3504
3505 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3506
3507 static int led_read(char *p)
3508 {
3509         int len = 0;
3510
3511         if (!led_supported) {
3512                 len += sprintf(p + len, "status:\t\tnot supported\n");
3513                 return len;
3514         }
3515         len += sprintf(p + len, "status:\t\tsupported\n");
3516
3517         if (led_supported == TPACPI_LED_570) {
3518                 /* 570 */
3519                 int i, status;
3520                 for (i = 0; i < 8; i++) {
3521                         if (!acpi_evalf(ec_handle,
3522                                         &status, "GLED", "dd", 1 << i))
3523                                 return -EIO;
3524                         len += sprintf(p + len, "%d:\t\t%s\n",
3525                                        i, led_status(status));
3526                 }
3527         }
3528
3529         len += sprintf(p + len, "commands:\t"
3530                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3531
3532         return len;
3533 }
3534
3535 /* off, on, blink */
3536 static const int led_sled_arg1[] = { 0, 1, 3 };
3537 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3538 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3539 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3540
3541 static int led_write(char *buf)
3542 {
3543         char *cmd;
3544         int led, ind, ret;
3545
3546         if (!led_supported)
3547                 return -ENODEV;
3548
3549         while ((cmd = next_cmd(&buf))) {
3550                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3551                         return -EINVAL;
3552
3553                 if (strstr(cmd, "off")) {
3554                         ind = 0;
3555                 } else if (strstr(cmd, "on")) {
3556                         ind = 1;
3557                 } else if (strstr(cmd, "blink")) {
3558                         ind = 2;
3559                 } else
3560                         return -EINVAL;
3561
3562                 if (led_supported == TPACPI_LED_570) {
3563                         /* 570 */
3564                         led = 1 << led;
3565                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3566                                         led, led_sled_arg1[ind]))
3567                                 return -EIO;
3568                 } else if (led_supported == TPACPI_LED_OLD) {
3569                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3570                         led = 1 << led;
3571                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3572                         if (ret >= 0)
3573                                 ret = ec_write(TPACPI_LED_EC_HLBL,
3574                                                 led * led_exp_hlbl[ind]);
3575                         if (ret >= 0)
3576                                 ret = ec_write(TPACPI_LED_EC_HLCL,
3577                                                 led * led_exp_hlcl[ind]);
3578                         if (ret < 0)
3579                                 return ret;
3580                 } else {
3581                         /* all others */
3582                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3583                                         led, led_led_arg1[ind]))
3584                                 return -EIO;
3585                 }
3586         }
3587
3588         return 0;
3589 }
3590
3591 static struct ibm_struct led_driver_data = {
3592         .name = "led",
3593         .read = led_read,
3594         .write = led_write,
3595 };
3596
3597 /*************************************************************************
3598  * Beep subdriver
3599  */
3600
3601 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3602
3603 static int __init beep_init(struct ibm_init_struct *iibm)
3604 {
3605         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3606
3607         TPACPI_ACPIHANDLE_INIT(beep);
3608
3609         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3610                 str_supported(beep_handle != NULL));
3611
3612         return (beep_handle)? 0 : 1;
3613 }
3614
3615 static int beep_read(char *p)
3616 {
3617         int len = 0;
3618
3619         if (!beep_handle)
3620                 len += sprintf(p + len, "status:\t\tnot supported\n");
3621         else {
3622                 len += sprintf(p + len, "status:\t\tsupported\n");
3623                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3624         }
3625
3626         return len;
3627 }
3628
3629 static int beep_write(char *buf)
3630 {
3631         char *cmd;
3632         int beep_cmd;
3633
3634         if (!beep_handle)
3635                 return -ENODEV;
3636
3637         while ((cmd = next_cmd(&buf))) {
3638                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3639                     beep_cmd >= 0 && beep_cmd <= 17) {
3640                         /* beep_cmd set */
3641                 } else
3642                         return -EINVAL;
3643                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3644                         return -EIO;
3645         }
3646
3647         return 0;
3648 }
3649
3650 static struct ibm_struct beep_driver_data = {
3651         .name = "beep",
3652         .read = beep_read,
3653         .write = beep_write,
3654 };
3655
3656 /*************************************************************************
3657  * Thermal subdriver
3658  */
3659
3660 enum thermal_access_mode {
3661         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3662         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3663         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3664         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3665         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3666 };
3667
3668 enum { /* TPACPI_THERMAL_TPEC_* */
3669         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3670         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3671         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3672 };
3673
3674 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3675 struct ibm_thermal_sensors_struct {
3676         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3677 };
3678
3679 static enum thermal_access_mode thermal_read_mode;
3680
3681 /* idx is zero-based */
3682 static int thermal_get_sensor(int idx, s32 *value)
3683 {
3684         int t;
3685         s8 tmp;
3686         char tmpi[5];
3687
3688         t = TP_EC_THERMAL_TMP0;
3689
3690         switch (thermal_read_mode) {
3691 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3692         case TPACPI_THERMAL_TPEC_16:
3693                 if (idx >= 8 && idx <= 15) {
3694                         t = TP_EC_THERMAL_TMP8;
3695                         idx -= 8;
3696                 }
3697                 /* fallthrough */
3698 #endif
3699         case TPACPI_THERMAL_TPEC_8:
3700                 if (idx <= 7) {
3701                         if (!acpi_ec_read(t + idx, &tmp))
3702                                 return -EIO;
3703                         *value = tmp * 1000;
3704                         return 0;
3705                 }
3706                 break;
3707
3708         case TPACPI_THERMAL_ACPI_UPDT:
3709                 if (idx <= 7) {
3710                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3711                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3712                                 return -EIO;
3713                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3714                                 return -EIO;
3715                         *value = (t - 2732) * 100;
3716                         return 0;
3717                 }
3718                 break;
3719
3720         case TPACPI_THERMAL_ACPI_TMP07:
3721                 if (idx <= 7) {
3722                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3723                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3724                                 return -EIO;
3725                         if (t > 127 || t < -127)
3726                                 t = TP_EC_THERMAL_TMP_NA;
3727                         *value = t * 1000;
3728                         return 0;
3729                 }
3730                 break;
3731
3732         case TPACPI_THERMAL_NONE:
3733         default:
3734                 return -ENOSYS;
3735         }
3736
3737         return -EINVAL;
3738 }
3739
3740 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3741 {
3742         int res, i;
3743         int n;
3744
3745         n = 8;
3746         i = 0;
3747
3748         if (!s)
3749                 return -EINVAL;
3750
3751         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3752                 n = 16;
3753
3754         for (i = 0 ; i < n; i++) {
3755                 res = thermal_get_sensor(i, &s->temp[i]);
3756                 if (res)
3757                         return res;
3758         }
3759
3760         return n;
3761 }
3762
3763 /* sysfs temp##_input -------------------------------------------------- */
3764
3765 static ssize_t thermal_temp_input_show(struct device *dev,
3766                            struct device_attribute *attr,
3767                            char *buf)
3768 {
3769         struct sensor_device_attribute *sensor_attr =
3770                                         to_sensor_dev_attr(attr);
3771         int idx = sensor_attr->index;
3772         s32 value;
3773         int res;
3774
3775         res = thermal_get_sensor(idx, &value);
3776         if (res)
3777                 return res;
3778         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3779                 return -ENXIO;
3780
3781         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3782 }
3783
3784 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3785          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3786                      thermal_temp_input_show, NULL, _idxB)
3787
3788 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3789         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3790         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3791         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3792         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3793         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3794         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3795         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3796         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3797         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3798         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3799         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3800         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3801         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3802         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3803         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3804         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3805 };
3806
3807 #define THERMAL_ATTRS(X) \
3808         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3809
3810 static struct attribute *thermal_temp_input_attr[] = {
3811         THERMAL_ATTRS(8),
3812         THERMAL_ATTRS(9),
3813         THERMAL_ATTRS(10),
3814         THERMAL_ATTRS(11),
3815         THERMAL_ATTRS(12),
3816         THERMAL_ATTRS(13),
3817         THERMAL_ATTRS(14),
3818         THERMAL_ATTRS(15),
3819         THERMAL_ATTRS(0),
3820         THERMAL_ATTRS(1),
3821         THERMAL_ATTRS(2),
3822         THERMAL_ATTRS(3),
3823         THERMAL_ATTRS(4),
3824         THERMAL_ATTRS(5),
3825         THERMAL_ATTRS(6),
3826         THERMAL_ATTRS(7),
3827         NULL
3828 };
3829
3830 static const struct attribute_group thermal_temp_input16_group = {
3831         .attrs = thermal_temp_input_attr
3832 };
3833
3834 static const struct attribute_group thermal_temp_input8_group = {
3835         .attrs = &thermal_temp_input_attr[8]
3836 };
3837
3838 #undef THERMAL_SENSOR_ATTR_TEMP
3839 #undef THERMAL_ATTRS
3840
3841 /* --------------------------------------------------------------------- */
3842
3843 static int __init thermal_init(struct ibm_init_struct *iibm)
3844 {
3845         u8 t, ta1, ta2;
3846         int i;
3847         int acpi_tmp7;
3848         int res;
3849
3850         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3851
3852         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3853
3854         if (thinkpad_id.ec_model) {
3855                 /*
3856                  * Direct EC access mode: sensors at registers
3857                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
3858                  * non-implemented, thermal sensors return 0x80 when
3859                  * not available
3860                  */
3861
3862                 ta1 = ta2 = 0;
3863                 for (i = 0; i < 8; i++) {
3864                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3865                                 ta1 |= t;
3866                         } else {
3867                                 ta1 = 0;
3868                                 break;
3869                         }
3870                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3871                                 ta2 |= t;
3872                         } else {
3873                                 ta1 = 0;
3874                                 break;
3875                         }
3876                 }
3877                 if (ta1 == 0) {
3878                         /* This is sheer paranoia, but we handle it anyway */
3879                         if (acpi_tmp7) {
3880                                 printk(TPACPI_ERR
3881                                        "ThinkPad ACPI EC access misbehaving, "
3882                                        "falling back to ACPI TMPx access "
3883                                        "mode\n");
3884                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3885                         } else {
3886                                 printk(TPACPI_ERR
3887                                        "ThinkPad ACPI EC access misbehaving, "
3888                                        "disabling thermal sensors access\n");
3889                                 thermal_read_mode = TPACPI_THERMAL_NONE;
3890                         }
3891                 } else {
3892                         thermal_read_mode =
3893                             (ta2 != 0) ?
3894                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
3895                 }
3896         } else if (acpi_tmp7) {
3897                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
3898                         /* 600e/x, 770e, 770x */
3899                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
3900                 } else {
3901                         /* Standard ACPI TMPx access, max 8 sensors */
3902                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3903                 }
3904         } else {
3905                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
3906                 thermal_read_mode = TPACPI_THERMAL_NONE;
3907         }
3908
3909         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
3910                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
3911                 thermal_read_mode);
3912
3913         switch (thermal_read_mode) {
3914         case TPACPI_THERMAL_TPEC_16:
3915                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3916                                 &thermal_temp_input16_group);
3917                 if (res)
3918                         return res;
3919                 break;
3920         case TPACPI_THERMAL_TPEC_8:
3921         case TPACPI_THERMAL_ACPI_TMP07:
3922         case TPACPI_THERMAL_ACPI_UPDT:
3923                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3924                                 &thermal_temp_input8_group);
3925                 if (res)
3926                         return res;
3927                 break;
3928         case TPACPI_THERMAL_NONE:
3929         default:
3930                 return 1;
3931         }
3932
3933         return 0;
3934 }
3935
3936 static void thermal_exit(void)
3937 {
3938         switch (thermal_read_mode) {
3939         case TPACPI_THERMAL_TPEC_16:
3940                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3941                                    &thermal_temp_input16_group);
3942                 break;
3943         case TPACPI_THERMAL_TPEC_8:
3944         case TPACPI_THERMAL_ACPI_TMP07:
3945         case TPACPI_THERMAL_ACPI_UPDT:
3946                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3947                                    &thermal_temp_input16_group);
3948                 break;
3949         case TPACPI_THERMAL_NONE:
3950         default:
3951                 break;
3952         }
3953 }
3954
3955 static int thermal_read(char *p)
3956 {
3957         int len = 0;
3958         int n, i;
3959         struct ibm_thermal_sensors_struct t;
3960
3961         n = thermal_get_sensors(&t);
3962         if (unlikely(n < 0))
3963                 return n;
3964
3965         len += sprintf(p + len, "temperatures:\t");
3966
3967         if (n > 0) {
3968                 for (i = 0; i < (n - 1); i++)
3969                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3970                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3971         } else
3972                 len += sprintf(p + len, "not supported\n");
3973
3974         return len;
3975 }
3976
3977 static struct ibm_struct thermal_driver_data = {
3978         .name = "thermal",
3979         .read = thermal_read,
3980         .exit = thermal_exit,
3981 };
3982
3983 /*************************************************************************
3984  * EC Dump subdriver
3985  */
3986
3987 static u8 ecdump_regs[256];
3988
3989 static int ecdump_read(char *p)
3990 {
3991         int len = 0;
3992         int i, j;
3993         u8 v;
3994
3995         len += sprintf(p + len, "EC      "
3996                        " +00 +01 +02 +03 +04 +05 +06 +07"
3997                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3998         for (i = 0; i < 256; i += 16) {
3999                 len += sprintf(p + len, "EC 0x%02x:", i);
4000                 for (j = 0; j < 16; j++) {
4001                         if (!acpi_ec_read(i + j, &v))
4002                                 break;
4003                         if (v != ecdump_regs[i + j])
4004                                 len += sprintf(p + len, " *%02x", v);
4005                         else
4006                                 len += sprintf(p + len, "  %02x", v);
4007                         ecdump_regs[i + j] = v;
4008                 }
4009                 len += sprintf(p + len, "\n");
4010                 if (j != 16)
4011                         break;
4012         }
4013
4014         /* These are way too dangerous to advertise openly... */
4015 #if 0
4016         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4017                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4018         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4019                        " (<offset> is 00-ff, <value> is 0-255)\n");
4020 #endif
4021         return len;
4022 }
4023
4024 static int ecdump_write(char *buf)
4025 {
4026         char *cmd;
4027         int i, v;
4028
4029         while ((cmd = next_cmd(&buf))) {
4030                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4031                         /* i and v set */
4032                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4033                         /* i and v set */
4034                 } else
4035                         return -EINVAL;
4036                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4037                         if (!acpi_ec_write(i, v))
4038                                 return -EIO;
4039                 } else
4040                         return -EINVAL;
4041         }
4042
4043         return 0;
4044 }
4045
4046 static struct ibm_struct ecdump_driver_data = {
4047         .name = "ecdump",
4048         .read = ecdump_read,
4049         .write = ecdump_write,
4050         .flags.experimental = 1,
4051 };
4052
4053 /*************************************************************************
4054  * Backlight/brightness subdriver
4055  */
4056
4057 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4058
4059 static struct backlight_device *ibm_backlight_device;
4060 static int brightness_offset = 0x31;
4061 static int brightness_mode;
4062 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4063
4064 static struct mutex brightness_mutex;
4065
4066 /*
4067  * ThinkPads can read brightness from two places: EC 0x31, or
4068  * CMOS NVRAM byte 0x5E, bits 0-3.
4069  */
4070 static int brightness_get(struct backlight_device *bd)
4071 {
4072         u8 lec = 0, lcmos = 0, level = 0;
4073
4074         if (brightness_mode & 1) {
4075                 if (!acpi_ec_read(brightness_offset, &lec))
4076                         return -EIO;
4077                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4078                 level = lec;
4079         };
4080         if (brightness_mode & 2) {
4081                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4082                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4083                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4084                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4085                 level = lcmos;
4086         }
4087
4088         if (brightness_mode == 3 && lec != lcmos) {
4089                 printk(TPACPI_ERR
4090                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4091                         "on display brightness level\n",
4092                         (unsigned int) lcmos,
4093                         (unsigned int) lec);
4094                 return -EIO;
4095         }
4096
4097         return level;
4098 }
4099
4100 /* May return EINTR which can always be mapped to ERESTARTSYS */
4101 static int brightness_set(int value)
4102 {
4103         int cmos_cmd, inc, i, res;
4104         int current_value;
4105
4106         if (value > ((tp_features.bright_16levels)? 15 : 7))
4107                 return -EINVAL;
4108
4109         res = mutex_lock_interruptible(&brightness_mutex);
4110         if (res < 0)
4111                 return res;
4112
4113         current_value = brightness_get(NULL);
4114         if (current_value < 0) {
4115                 res = current_value;
4116                 goto errout;
4117         }
4118
4119         cmos_cmd = value > current_value ?
4120                         TP_CMOS_BRIGHTNESS_UP :
4121                         TP_CMOS_BRIGHTNESS_DOWN;
4122         inc = (value > current_value)? 1 : -1;
4123
4124         res = 0;
4125         for (i = current_value; i != value; i += inc) {
4126                 if ((brightness_mode & 2) &&
4127                     issue_thinkpad_cmos_command(cmos_cmd)) {
4128                         res = -EIO;
4129                         goto errout;
4130                 }
4131                 if ((brightness_mode & 1) &&
4132                     !acpi_ec_write(brightness_offset, i + inc)) {
4133                         res = -EIO;
4134                         goto errout;;
4135                 }
4136         }
4137
4138 errout:
4139         mutex_unlock(&brightness_mutex);
4140         return res;
4141 }
4142
4143 /* sysfs backlight class ----------------------------------------------- */
4144
4145 static int brightness_update_status(struct backlight_device *bd)
4146 {
4147         /* it is the backlight class's job (caller) to handle
4148          * EINTR and other errors properly */
4149         return brightness_set(
4150                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4151                  bd->props.power == FB_BLANK_UNBLANK) ?
4152                                 bd->props.brightness : 0);
4153 }
4154
4155 static struct backlight_ops ibm_backlight_data = {
4156         .get_brightness = brightness_get,
4157         .update_status  = brightness_update_status,
4158 };
4159
4160 /* --------------------------------------------------------------------- */
4161
4162 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4163 {
4164         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4165         union acpi_object *obj;
4166         int rc;
4167
4168         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4169                 obj = (union acpi_object *)buffer.pointer;
4170                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4171                         printk(TPACPI_ERR "Unknown BCLL data, "
4172                                "please report this to %s\n", TPACPI_MAIL);
4173                         rc = 0;
4174                 } else {
4175                         rc = obj->package.count;
4176                 }
4177         } else {
4178                 return 0;
4179         }
4180
4181         kfree(buffer.pointer);
4182         return rc;
4183 }
4184
4185 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4186                                         void *context, void **rv)
4187 {
4188         char name[ACPI_PATH_SEGMENT_LENGTH];
4189         struct acpi_buffer buffer = { sizeof(name), &name };
4190
4191         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4192             !strncmp("BCLL", name, sizeof(name) - 1)) {
4193                 if (tpacpi_query_bcll_levels(handle) == 16) {
4194                         *rv = handle;
4195                         return AE_CTRL_TERMINATE;
4196                 } else {
4197                         return AE_OK;
4198                 }
4199         } else {
4200                 return AE_OK;
4201         }
4202 }
4203
4204 static int __init brightness_check_levels(void)
4205 {
4206         int status;
4207         void *found_node = NULL;
4208
4209         if (!vid_handle) {
4210                 TPACPI_ACPIHANDLE_INIT(vid);
4211         }
4212         if (!vid_handle)
4213                 return 0;
4214
4215         /* Search for a BCLL package with 16 levels */
4216         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4217                                         brightness_find_bcll, NULL,
4218                                         &found_node);
4219
4220         return (ACPI_SUCCESS(status) && found_node != NULL);
4221 }
4222
4223 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4224                                         void *context, void **rv)
4225 {
4226         char name[ACPI_PATH_SEGMENT_LENGTH];
4227         struct acpi_buffer buffer = { sizeof(name), &name };
4228
4229         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4230             !strncmp("_BCL", name, sizeof(name) - 1)) {
4231                 *rv = handle;
4232                 return AE_CTRL_TERMINATE;
4233         } else {
4234                 return AE_OK;
4235         }
4236 }
4237
4238 static int __init brightness_check_std_acpi_support(void)
4239 {
4240         int status;
4241         void *found_node = NULL;
4242
4243         if (!vid_handle) {
4244                 TPACPI_ACPIHANDLE_INIT(vid);
4245         }
4246         if (!vid_handle)
4247                 return 0;
4248
4249         /* Search for a _BCL method, but don't execute it */
4250         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4251                                      brightness_find_bcl, NULL, &found_node);
4252
4253         return (ACPI_SUCCESS(status) && found_node != NULL);
4254 }
4255
4256 static int __init brightness_init(struct ibm_init_struct *iibm)
4257 {
4258         int b;
4259
4260         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4261
4262         mutex_init(&brightness_mutex);
4263
4264         if (!brightness_enable) {
4265                 dbg_printk(TPACPI_DBG_INIT,
4266                            "brightness support disabled by "
4267                            "module parameter\n");
4268                 return 1;
4269         } else if (brightness_enable > 1) {
4270                 if (brightness_check_std_acpi_support()) {
4271                         printk(TPACPI_NOTICE
4272                                "standard ACPI backlight interface "
4273                                "available, not loading native one...\n");
4274                         return 1;
4275                 }
4276         }
4277
4278         if (!brightness_mode) {
4279                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4280                         brightness_mode = 2;
4281                 else
4282                         brightness_mode = 3;
4283
4284                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4285                         brightness_mode);
4286         }
4287
4288         if (brightness_mode > 3)
4289                 return -EINVAL;
4290
4291         tp_features.bright_16levels =
4292                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4293                         brightness_check_levels();
4294
4295         b = brightness_get(NULL);
4296         if (b < 0)
4297                 return 1;
4298
4299         if (tp_features.bright_16levels)
4300                 printk(TPACPI_INFO
4301                        "detected a 16-level brightness capable ThinkPad\n");
4302
4303         ibm_backlight_device = backlight_device_register(
4304                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4305                                         &ibm_backlight_data);
4306         if (IS_ERR(ibm_backlight_device)) {
4307                 printk(TPACPI_ERR "Could not register backlight device\n");
4308                 return PTR_ERR(ibm_backlight_device);
4309         }
4310         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4311
4312         ibm_backlight_device->props.max_brightness =
4313                                 (tp_features.bright_16levels)? 15 : 7;
4314         ibm_backlight_device->props.brightness = b;
4315         backlight_update_status(ibm_backlight_device);
4316
4317         return 0;
4318 }
4319
4320 static void brightness_exit(void)
4321 {
4322         if (ibm_backlight_device) {
4323                 vdbg_printk(TPACPI_DBG_EXIT,
4324                             "calling backlight_device_unregister()\n");
4325                 backlight_device_unregister(ibm_backlight_device);
4326                 ibm_backlight_device = NULL;
4327         }
4328 }
4329
4330 static int brightness_read(char *p)
4331 {
4332         int len = 0;
4333         int level;
4334
4335         level = brightness_get(NULL);
4336         if (level < 0) {
4337                 len += sprintf(p + len, "level:\t\tunreadable\n");
4338         } else {
4339                 len += sprintf(p + len, "level:\t\t%d\n", level);
4340                 len += sprintf(p + len, "commands:\tup, down\n");
4341                 len += sprintf(p + len, "commands:\tlevel <level>"
4342                                " (<level> is 0-%d)\n",
4343                                (tp_features.bright_16levels) ? 15 : 7);
4344         }
4345
4346         return len;
4347 }
4348
4349 static int brightness_write(char *buf)
4350 {
4351         int level;
4352         int rc;
4353         char *cmd;
4354         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4355
4356         level = brightness_get(NULL);
4357         if (level < 0)
4358                 return level;
4359
4360         while ((cmd = next_cmd(&buf))) {
4361                 if (strlencmp(cmd, "up") == 0) {
4362                         if (level < max_level)
4363                                 level++;
4364                 } else if (strlencmp(cmd, "down") == 0) {
4365                         if (level > 0)
4366                                 level--;
4367                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4368                            level >= 0 && level <= max_level) {
4369                         /* new level set */
4370                 } else
4371                         return -EINVAL;
4372         }
4373
4374         /*
4375          * Now we know what the final level should be, so we try to set it.
4376          * Doing it this way makes the syscall restartable in case of EINTR
4377          */
4378         rc = brightness_set(level);
4379         return (rc == -EINTR)? ERESTARTSYS : rc;
4380 }
4381
4382 static struct ibm_struct brightness_driver_data = {
4383         .name = "brightness",
4384         .read = brightness_read,
4385         .write = brightness_write,
4386         .exit = brightness_exit,
4387 };
4388
4389 /*************************************************************************
4390  * Volume subdriver
4391  */
4392
4393 static int volume_offset = 0x30;
4394
4395 static int volume_read(char *p)
4396 {
4397         int len = 0;
4398         u8 level;
4399
4400         if (!acpi_ec_read(volume_offset, &level)) {
4401                 len += sprintf(p + len, "level:\t\tunreadable\n");
4402         } else {
4403                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4404                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4405                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4406                 len += sprintf(p + len, "commands:\tlevel <level>"
4407                                " (<level> is 0-15)\n");
4408         }
4409
4410         return len;
4411 }
4412
4413 static int volume_write(char *buf)
4414 {
4415         int cmos_cmd, inc, i;
4416         u8 level, mute;
4417         int new_level, new_mute;
4418         char *cmd;
4419
4420         while ((cmd = next_cmd(&buf))) {
4421                 if (!acpi_ec_read(volume_offset, &level))
4422                         return -EIO;
4423                 new_mute = mute = level & 0x40;
4424                 new_level = level = level & 0xf;
4425
4426                 if (strlencmp(cmd, "up") == 0) {
4427                         if (mute)
4428                                 new_mute = 0;
4429                         else
4430                                 new_level = level == 15 ? 15 : level + 1;
4431                 } else if (strlencmp(cmd, "down") == 0) {
4432                         if (mute)
4433                                 new_mute = 0;
4434                         else
4435                                 new_level = level == 0 ? 0 : level - 1;
4436                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4437                            new_level >= 0 && new_level <= 15) {
4438                         /* new_level set */
4439                 } else if (strlencmp(cmd, "mute") == 0) {
4440                         new_mute = 0x40;
4441                 } else
4442                         return -EINVAL;
4443
4444                 if (new_level != level) {
4445                         /* mute doesn't change */
4446
4447                         cmos_cmd = (new_level > level) ?
4448                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4449                         inc = new_level > level ? 1 : -1;
4450
4451                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4452                                      !acpi_ec_write(volume_offset, level)))
4453                                 return -EIO;
4454
4455                         for (i = level; i != new_level; i += inc)
4456                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4457                                     !acpi_ec_write(volume_offset, i + inc))
4458                                         return -EIO;
4459
4460                         if (mute &&
4461                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4462                              !acpi_ec_write(volume_offset, new_level + mute))) {
4463                                 return -EIO;
4464                         }
4465                 }
4466
4467                 if (new_mute != mute) {
4468                         /* level doesn't change */
4469
4470                         cmos_cmd = (new_mute) ?
4471                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4472
4473                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4474                             !acpi_ec_write(volume_offset, level + new_mute))
4475                                 return -EIO;
4476                 }
4477         }
4478
4479         return 0;
4480 }
4481
4482 static struct ibm_struct volume_driver_data = {
4483         .name = "volume",
4484         .read = volume_read,
4485         .write = volume_write,
4486 };
4487
4488 /*************************************************************************
4489  * Fan subdriver
4490  */
4491
4492 /*
4493  * FAN ACCESS MODES
4494  *
4495  * TPACPI_FAN_RD_ACPI_GFAN:
4496  *      ACPI GFAN method: returns fan level
4497  *
4498  *      see TPACPI_FAN_WR_ACPI_SFAN
4499  *      EC 0x2f (HFSP) not available if GFAN exists
4500  *
4501  * TPACPI_FAN_WR_ACPI_SFAN:
4502  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4503  *
4504  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4505  *      it for writing.
4506  *
4507  * TPACPI_FAN_WR_TPEC:
4508  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4509  *      Supported on almost all ThinkPads
4510  *
4511  *      Fan speed changes of any sort (including those caused by the
4512  *      disengaged mode) are usually done slowly by the firmware as the
4513  *      maximum ammount of fan duty cycle change per second seems to be
4514  *      limited.
4515  *
4516  *      Reading is not available if GFAN exists.
4517  *      Writing is not available if SFAN exists.
4518  *
4519  *      Bits
4520  *       7      automatic mode engaged;
4521  *              (default operation mode of the ThinkPad)
4522  *              fan level is ignored in this mode.
4523  *       6      full speed mode (takes precedence over bit 7);
4524  *              not available on all thinkpads.  May disable
4525  *              the tachometer while the fan controller ramps up
4526  *              the speed (which can take up to a few *minutes*).
4527  *              Speeds up fan to 100% duty-cycle, which is far above
4528  *              the standard RPM levels.  It is not impossible that
4529  *              it could cause hardware damage.
4530  *      5-3     unused in some models.  Extra bits for fan level
4531  *              in others, but still useless as all values above
4532  *              7 map to the same speed as level 7 in these models.
4533  *      2-0     fan level (0..7 usually)
4534  *                      0x00 = stop
4535  *                      0x07 = max (set when temperatures critical)
4536  *              Some ThinkPads may have other levels, see
4537  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4538  *
4539  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4540  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4541  *      does so, its initial value is meaningless (0x07).
4542  *
4543  *      For firmware bugs, refer to:
4544  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4545  *
4546  *      ----
4547  *
4548  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4549  *      Main fan tachometer reading (in RPM)
4550  *
4551  *      This register is present on all ThinkPads with a new-style EC, and
4552  *      it is known not to be present on the A21m/e, and T22, as there is
4553  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4554  *      ThinkPads from this same time period (and earlier) probably lack the
4555  *      tachometer as well.
4556  *
4557  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4558  *      was never fixed by IBM to report the EC firmware version string
4559  *      probably support the tachometer (like the early X models), so
4560  *      detecting it is quite hard.  We need more data to know for sure.
4561  *
4562  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4563  *      might result.
4564  *
4565  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4566  *      mode.
4567  *
4568  *      For firmware bugs, refer to:
4569  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4570  *
4571  * TPACPI_FAN_WR_ACPI_FANS:
4572  *      ThinkPad X31, X40, X41.  Not available in the X60.
4573  *
4574  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4575  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4576  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4577  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4578  *
4579  *      The speeds are stored on handles
4580  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4581  *
4582  *      There are three default speed sets, acessible as handles:
4583  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4584  *
4585  *      ACPI DSDT switches which set is in use depending on various
4586  *      factors.
4587  *
4588  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4589  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4590  *      but the ACPI tables just mention level 7.
4591  */
4592
4593 enum {                                  /* Fan control constants */
4594         fan_status_offset = 0x2f,       /* EC register 0x2f */
4595         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4596                                          * 0x84 must be read before 0x85 */
4597
4598         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4599         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4600
4601         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4602 };
4603
4604 enum fan_status_access_mode {
4605         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4606         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4607         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4608 };
4609
4610 enum fan_control_access_mode {
4611         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4612         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4613         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4614         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4615 };
4616
4617 enum fan_control_commands {
4618         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4619         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4620         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4621                                                  * and also watchdog cmd */
4622 };
4623
4624 static int fan_control_allowed;
4625
4626 static enum fan_status_access_mode fan_status_access_mode;
4627 static enum fan_control_access_mode fan_control_access_mode;
4628 static enum fan_control_commands fan_control_commands;
4629
4630 static u8 fan_control_initial_status;
4631 static u8 fan_control_desired_level;
4632 static int fan_watchdog_maxinterval;
4633
4634 static struct mutex fan_mutex;
4635
4636 static void fan_watchdog_fire(struct work_struct *ignored);
4637 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4638
4639 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4640 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4641            "\\FSPD",            /* 600e/x, 770e, 770x */
4642            );                   /* all others */
4643 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4644            "JFNS",              /* 770x-JL */
4645            );                   /* all others */
4646
4647 /*
4648  * Call with fan_mutex held
4649  */
4650 static void fan_update_desired_level(u8 status)
4651 {
4652         if ((status &
4653              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4654                 if (status > 7)
4655                         fan_control_desired_level = 7;
4656                 else
4657                         fan_control_desired_level = status;
4658         }
4659 }
4660
4661 static int fan_get_status(u8 *status)
4662 {
4663         u8 s;
4664
4665         /* TODO:
4666          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4667
4668         switch (fan_status_access_mode) {
4669         case TPACPI_FAN_RD_ACPI_GFAN:
4670                 /* 570, 600e/x, 770e, 770x */
4671
4672                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4673                         return -EIO;
4674
4675                 if (likely(status))
4676                         *status = s & 0x07;
4677
4678                 break;
4679
4680         case TPACPI_FAN_RD_TPEC:
4681                 /* all except 570, 600e/x, 770e, 770x */
4682                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4683                         return -EIO;
4684
4685                 if (likely(status))
4686                         *status = s;
4687
4688                 break;
4689
4690         default:
4691                 return -ENXIO;
4692         }
4693
4694         return 0;
4695 }
4696
4697 static int fan_get_status_safe(u8 *status)
4698 {
4699         int rc;
4700         u8 s;
4701
4702         if (mutex_lock_interruptible(&fan_mutex))
4703                 return -ERESTARTSYS;
4704         rc = fan_get_status(&s);
4705         if (!rc)
4706                 fan_update_desired_level(s);
4707         mutex_unlock(&fan_mutex);
4708
4709         if (status)
4710                 *status = s;
4711
4712         return rc;
4713 }
4714
4715 static int fan_get_speed(unsigned int *speed)
4716 {
4717         u8 hi, lo;
4718
4719         switch (fan_status_access_mode) {
4720         case TPACPI_FAN_RD_TPEC:
4721                 /* all except 570, 600e/x, 770e, 770x */
4722                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4723                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4724                         return -EIO;
4725
4726                 if (likely(speed))
4727                         *speed = (hi << 8) | lo;
4728
4729                 break;
4730
4731         default:
4732                 return -ENXIO;
4733         }
4734
4735         return 0;
4736 }
4737
4738 static int fan_set_level(int level)
4739 {
4740         if (!fan_control_allowed)
4741                 return -EPERM;
4742
4743         switch (fan_control_access_mode) {
4744         case TPACPI_FAN_WR_ACPI_SFAN:
4745                 if (level >= 0 && level <= 7) {
4746                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4747                                 return -EIO;
4748                 } else
4749                         return -EINVAL;
4750                 break;
4751
4752         case TPACPI_FAN_WR_ACPI_FANS:
4753         case TPACPI_FAN_WR_TPEC:
4754                 if ((level != TP_EC_FAN_AUTO) &&
4755                     (level != TP_EC_FAN_FULLSPEED) &&
4756                     ((level < 0) || (level > 7)))
4757                         return -EINVAL;
4758
4759                 /* safety net should the EC not support AUTO
4760                  * or FULLSPEED mode bits and just ignore them */
4761                 if (level & TP_EC_FAN_FULLSPEED)
4762                         level |= 7;     /* safety min speed 7 */
4763                 else if (level & TP_EC_FAN_FULLSPEED)
4764                         level |= 4;     /* safety min speed 4 */
4765
4766                 if (!acpi_ec_write(fan_status_offset, level))
4767                         return -EIO;
4768                 else
4769                         tp_features.fan_ctrl_status_undef = 0;
4770                 break;
4771
4772         default:
4773                 return -ENXIO;
4774         }
4775         return 0;
4776 }
4777
4778 static int fan_set_level_safe(int level)
4779 {
4780         int rc;
4781
4782         if (!fan_control_allowed)
4783                 return -EPERM;
4784
4785         if (mutex_lock_interruptible(&fan_mutex))
4786                 return -ERESTARTSYS;
4787
4788         if (level == TPACPI_FAN_LAST_LEVEL)
4789                 level = fan_control_desired_level;
4790
4791         rc = fan_set_level(level);
4792         if (!rc)
4793                 fan_update_desired_level(level);
4794
4795         mutex_unlock(&fan_mutex);
4796         return rc;
4797 }
4798
4799 static int fan_set_enable(void)
4800 {
4801         u8 s;
4802         int rc;
4803
4804         if (!fan_control_allowed)
4805                 return -EPERM;
4806
4807         if (mutex_lock_interruptible(&fan_mutex))
4808                 return -ERESTARTSYS;
4809
4810         switch (fan_control_access_mode) {
4811         case TPACPI_FAN_WR_ACPI_FANS:
4812         case TPACPI_FAN_WR_TPEC:
4813                 rc = fan_get_status(&s);
4814                 if (rc < 0)
4815                         break;
4816
4817                 /* Don't go out of emergency fan mode */
4818                 if (s != 7) {
4819                         s &= 0x07;
4820                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4821                 }
4822
4823                 if (!acpi_ec_write(fan_status_offset, s))
4824                         rc = -EIO;
4825                 else {
4826                         tp_features.fan_ctrl_status_undef = 0;
4827                         rc = 0;
4828                 }
4829                 break;
4830
4831         case TPACPI_FAN_WR_ACPI_SFAN:
4832                 rc = fan_get_status(&s);
4833                 if (rc < 0)
4834                         break;
4835
4836                 s &= 0x07;
4837
4838                 /* Set fan to at least level 4 */
4839                 s |= 4;
4840
4841                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4842                         rc = -EIO;
4843                 else
4844                         rc = 0;
4845                 break;
4846
4847         default:
4848                 rc = -ENXIO;
4849         }
4850
4851         mutex_unlock(&fan_mutex);
4852         return rc;
4853 }
4854
4855 static int fan_set_disable(void)
4856 {
4857         int rc;
4858
4859         if (!fan_control_allowed)
4860                 return -EPERM;
4861
4862         if (mutex_lock_interruptible(&fan_mutex))
4863                 return -ERESTARTSYS;
4864
4865         rc = 0;
4866         switch (fan_control_access_mode) {
4867         case TPACPI_FAN_WR_ACPI_FANS:
4868         case TPACPI_FAN_WR_TPEC:
4869                 if (!acpi_ec_write(fan_status_offset, 0x00))
4870                         rc = -EIO;
4871                 else {
4872                         fan_control_desired_level = 0;
4873                         tp_features.fan_ctrl_status_undef = 0;
4874                 }
4875                 break;
4876
4877         case TPACPI_FAN_WR_ACPI_SFAN:
4878                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4879                         rc = -EIO;
4880                 else
4881                         fan_control_desired_level = 0;
4882                 break;
4883
4884         default:
4885                 rc = -ENXIO;
4886         }
4887
4888
4889         mutex_unlock(&fan_mutex);
4890         return rc;
4891 }
4892
4893 static int fan_set_speed(int speed)
4894 {
4895         int rc;
4896
4897         if (!fan_control_allowed)
4898                 return -EPERM;
4899
4900         if (mutex_lock_interruptible(&fan_mutex))
4901                 return -ERESTARTSYS;
4902
4903         rc = 0;
4904         switch (fan_control_access_mode) {
4905         case TPACPI_FAN_WR_ACPI_FANS:
4906                 if (speed >= 0 && speed <= 65535) {
4907                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4908                                         speed, speed, speed))
4909                                 rc = -EIO;
4910                 } else
4911                         rc = -EINVAL;
4912                 break;
4913
4914         default:
4915                 rc = -ENXIO;
4916         }
4917
4918         mutex_unlock(&fan_mutex);
4919         return rc;
4920 }
4921
4922 static void fan_watchdog_reset(void)
4923 {
4924         static int fan_watchdog_active;
4925
4926         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4927                 return;
4928
4929         if (fan_watchdog_active)
4930                 cancel_delayed_work(&fan_watchdog_task);
4931
4932         if (fan_watchdog_maxinterval > 0 &&
4933             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4934                 fan_watchdog_active = 1;
4935                 if (!schedule_delayed_work(&fan_watchdog_task,
4936                                 msecs_to_jiffies(fan_watchdog_maxinterval
4937                                                  * 1000))) {
4938                         printk(TPACPI_ERR
4939                                "failed to schedule the fan watchdog, "
4940                                "watchdog will not trigger\n");
4941                 }
4942         } else
4943                 fan_watchdog_active = 0;
4944 }
4945
4946 static void fan_watchdog_fire(struct work_struct *ignored)
4947 {
4948         int rc;
4949
4950         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4951                 return;
4952
4953         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
4954         rc = fan_set_enable();
4955         if (rc < 0) {
4956                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
4957                         "will try again later...\n", -rc);
4958                 /* reschedule for later */
4959                 fan_watchdog_reset();
4960         }
4961 }
4962
4963 /*
4964  * SYSFS fan layout: hwmon compatible (device)
4965  *
4966  * pwm*_enable:
4967  *      0: "disengaged" mode
4968  *      1: manual mode
4969  *      2: native EC "auto" mode (recommended, hardware default)
4970  *
4971  * pwm*: set speed in manual mode, ignored otherwise.
4972  *      0 is level 0; 255 is level 7. Intermediate points done with linear
4973  *      interpolation.
4974  *
4975  * fan*_input: tachometer reading, RPM
4976  *
4977  *
4978  * SYSFS fan layout: extensions
4979  *
4980  * fan_watchdog (driver):
4981  *      fan watchdog interval in seconds, 0 disables (default), max 120
4982  */
4983
4984 /* sysfs fan pwm1_enable ----------------------------------------------- */
4985 static ssize_t fan_pwm1_enable_show(struct device *dev,
4986                                     struct device_attribute *attr,
4987                                     char *buf)
4988 {
4989         int res, mode;
4990         u8 status;
4991
4992         res = fan_get_status_safe(&status);
4993         if (res)
4994                 return res;
4995
4996         if (unlikely(tp_features.fan_ctrl_status_undef)) {
4997                 if (status != fan_control_initial_status) {
4998                         tp_features.fan_ctrl_status_undef = 0;
4999                 } else {
5000                         /* Return most likely status. In fact, it
5001                          * might be the only possible status */
5002                         status = TP_EC_FAN_AUTO;
5003                 }
5004         }
5005
5006         if (status & TP_EC_FAN_FULLSPEED) {
5007                 mode = 0;
5008         } else if (status & TP_EC_FAN_AUTO) {
5009                 mode = 2;
5010         } else
5011                 mode = 1;
5012
5013         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5014 }
5015
5016 static ssize_t fan_pwm1_enable_store(struct device *dev,
5017                                      struct device_attribute *attr,
5018                                      const char *buf, size_t count)
5019 {
5020         unsigned long t;
5021         int res, level;
5022
5023         if (parse_strtoul(buf, 2, &t))
5024                 return -EINVAL;
5025
5026         switch (t) {
5027         case 0:
5028                 level = TP_EC_FAN_FULLSPEED;
5029                 break;
5030         case 1:
5031                 level = TPACPI_FAN_LAST_LEVEL;
5032                 break;
5033         case 2:
5034                 level = TP_EC_FAN_AUTO;
5035                 break;
5036         case 3:
5037                 /* reserved for software-controlled auto mode */
5038                 return -ENOSYS;
5039         default:
5040                 return -EINVAL;
5041         }
5042
5043         res = fan_set_level_safe(level);
5044         if (res == -ENXIO)
5045                 return -EINVAL;
5046         else if (res < 0)
5047                 return res;
5048
5049         fan_watchdog_reset();
5050
5051         return count;
5052 }
5053
5054 static struct device_attribute dev_attr_fan_pwm1_enable =
5055         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5056                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5057
5058 /* sysfs fan pwm1 ------------------------------------------------------ */
5059 static ssize_t fan_pwm1_show(struct device *dev,
5060                              struct device_attribute *attr,
5061                              char *buf)
5062 {
5063         int res;
5064         u8 status;
5065
5066         res = fan_get_status_safe(&status);
5067         if (res)
5068                 return res;
5069
5070         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5071                 if (status != fan_control_initial_status) {
5072                         tp_features.fan_ctrl_status_undef = 0;
5073                 } else {
5074                         status = TP_EC_FAN_AUTO;
5075                 }
5076         }
5077
5078         if ((status &
5079              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5080                 status = fan_control_desired_level;
5081
5082         if (status > 7)
5083                 status = 7;
5084
5085         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5086 }
5087
5088 static ssize_t fan_pwm1_store(struct device *dev,
5089                               struct device_attribute *attr,
5090                               const char *buf, size_t count)
5091 {
5092         unsigned long s;
5093         int rc;
5094         u8 status, newlevel;
5095
5096         if (parse_strtoul(buf, 255, &s))
5097                 return -EINVAL;
5098
5099         /* scale down from 0-255 to 0-7 */
5100         newlevel = (s >> 5) & 0x07;
5101
5102         if (mutex_lock_interruptible(&fan_mutex))
5103                 return -ERESTARTSYS;
5104
5105         rc = fan_get_status(&status);
5106         if (!rc && (status &
5107                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5108                 rc = fan_set_level(newlevel);
5109                 if (rc == -ENXIO)
5110                         rc = -EINVAL;
5111                 else if (!rc) {
5112                         fan_update_desired_level(newlevel);
5113                         fan_watchdog_reset();
5114                 }
5115         }
5116
5117         mutex_unlock(&fan_mutex);
5118         return (rc)? rc : count;
5119 }
5120
5121 static struct device_attribute dev_attr_fan_pwm1 =
5122         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5123                 fan_pwm1_show, fan_pwm1_store);
5124
5125 /* sysfs fan fan1_input ------------------------------------------------ */
5126 static ssize_t fan_fan1_input_show(struct device *dev,
5127                            struct device_attribute *attr,
5128                            char *buf)
5129 {
5130         int res;
5131         unsigned int speed;
5132
5133         res = fan_get_speed(&speed);
5134         if (res < 0)
5135                 return res;
5136
5137         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5138 }
5139
5140 static struct device_attribute dev_attr_fan_fan1_input =
5141         __ATTR(fan1_input, S_IRUGO,
5142                 fan_fan1_input_show, NULL);
5143
5144 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5145 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5146                                      char *buf)
5147 {
5148         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5149 }
5150
5151 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5152                                       const char *buf, size_t count)
5153 {
5154         unsigned long t;
5155
5156         if (parse_strtoul(buf, 120, &t))
5157                 return -EINVAL;
5158
5159         if (!fan_control_allowed)
5160                 return -EPERM;
5161
5162         fan_watchdog_maxinterval = t;
5163         fan_watchdog_reset();
5164
5165         return count;
5166 }
5167
5168 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5169                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5170
5171 /* --------------------------------------------------------------------- */
5172 static struct attribute *fan_attributes[] = {
5173         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5174         &dev_attr_fan_fan1_input.attr,
5175         NULL
5176 };
5177
5178 static const struct attribute_group fan_attr_group = {
5179         .attrs = fan_attributes,
5180 };
5181
5182 static int __init fan_init(struct ibm_init_struct *iibm)
5183 {
5184         int rc;
5185
5186         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5187
5188         mutex_init(&fan_mutex);
5189         fan_status_access_mode = TPACPI_FAN_NONE;
5190         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5191         fan_control_commands = 0;
5192         fan_watchdog_maxinterval = 0;
5193         tp_features.fan_ctrl_status_undef = 0;
5194         fan_control_desired_level = 7;
5195
5196         TPACPI_ACPIHANDLE_INIT(fans);
5197         TPACPI_ACPIHANDLE_INIT(gfan);
5198         TPACPI_ACPIHANDLE_INIT(sfan);
5199
5200         if (gfan_handle) {
5201                 /* 570, 600e/x, 770e, 770x */
5202                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5203         } else {
5204                 /* all other ThinkPads: note that even old-style
5205                  * ThinkPad ECs supports the fan control register */
5206                 if (likely(acpi_ec_read(fan_status_offset,
5207                                         &fan_control_initial_status))) {
5208                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5209
5210                         /* In some ThinkPads, neither the EC nor the ACPI
5211                          * DSDT initialize the fan status, and it ends up
5212                          * being set to 0x07 when it *could* be either
5213                          * 0x07 or 0x80.
5214                          *
5215                          * Enable for TP-1Y (T43), TP-78 (R51e),
5216                          * TP-76 (R52), TP-70 (T43, R52), which are known
5217                          * to be buggy. */
5218                         if (fan_control_initial_status == 0x07) {
5219                                 switch (thinkpad_id.ec_model) {
5220                                 case 0x5931: /* TP-1Y */
5221                                 case 0x3837: /* TP-78 */
5222                                 case 0x3637: /* TP-76 */
5223                                 case 0x3037: /* TP-70 */
5224                                         printk(TPACPI_NOTICE
5225                                                "fan_init: initial fan status "
5226                                                "is unknown, assuming it is "
5227                                                "in auto mode\n");
5228                                         tp_features.fan_ctrl_status_undef = 1;
5229                                         ;;
5230                                 }
5231                         }
5232                 } else {
5233                         printk(TPACPI_ERR
5234                                "ThinkPad ACPI EC access misbehaving, "
5235                                "fan status and control unavailable\n");
5236                         return 1;
5237                 }
5238         }
5239
5240         if (sfan_handle) {
5241                 /* 570, 770x-JL */
5242                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5243                 fan_control_commands |=
5244                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5245         } else {
5246                 if (!gfan_handle) {
5247                         /* gfan without sfan means no fan control */
5248                         /* all other models implement TP EC 0x2f control */
5249
5250                         if (fans_handle) {
5251                                 /* X31, X40, X41 */
5252                                 fan_control_access_mode =
5253                                     TPACPI_FAN_WR_ACPI_FANS;
5254                                 fan_control_commands |=
5255                                     TPACPI_FAN_CMD_SPEED |
5256                                     TPACPI_FAN_CMD_LEVEL |
5257                                     TPACPI_FAN_CMD_ENABLE;
5258                         } else {
5259                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5260                                 fan_control_commands |=
5261                                     TPACPI_FAN_CMD_LEVEL |
5262                                     TPACPI_FAN_CMD_ENABLE;
5263                         }
5264                 }
5265         }
5266
5267         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5268                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5269                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5270                 fan_status_access_mode, fan_control_access_mode);
5271
5272         /* fan control master switch */
5273         if (!fan_control_allowed) {
5274                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5275                 fan_control_commands = 0;
5276                 dbg_printk(TPACPI_DBG_INIT,
5277                            "fan control features disabled by parameter\n");
5278         }
5279
5280         /* update fan_control_desired_level */
5281         if (fan_status_access_mode != TPACPI_FAN_NONE)
5282                 fan_get_status_safe(NULL);
5283
5284         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5285             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5286                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5287                                          &fan_attr_group);
5288                 if (!(rc < 0))
5289                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5290                                         &driver_attr_fan_watchdog);
5291                 if (rc < 0)
5292                         return rc;
5293                 return 0;
5294         } else
5295                 return 1;
5296 }
5297
5298 static void fan_exit(void)
5299 {
5300         vdbg_printk(TPACPI_DBG_EXIT,
5301                     "cancelling any pending fan watchdog tasks\n");
5302
5303         /* FIXME: can we really do this unconditionally? */
5304         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5305         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5306                            &driver_attr_fan_watchdog);
5307
5308         cancel_delayed_work(&fan_watchdog_task);
5309         flush_scheduled_work();
5310 }
5311
5312 static int fan_read(char *p)
5313 {
5314         int len = 0;
5315         int rc;
5316         u8 status;
5317         unsigned int speed = 0;
5318
5319         switch (fan_status_access_mode) {
5320         case TPACPI_FAN_RD_ACPI_GFAN:
5321                 /* 570, 600e/x, 770e, 770x */
5322                 rc = fan_get_status_safe(&status);
5323                 if (rc < 0)
5324                         return rc;
5325
5326                 len += sprintf(p + len, "status:\t\t%s\n"
5327                                "level:\t\t%d\n",
5328                                (status != 0) ? "enabled" : "disabled", status);
5329                 break;
5330
5331         case TPACPI_FAN_RD_TPEC:
5332                 /* all except 570, 600e/x, 770e, 770x */
5333                 rc = fan_get_status_safe(&status);
5334                 if (rc < 0)
5335                         return rc;
5336
5337                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5338                         if (status != fan_control_initial_status)
5339                                 tp_features.fan_ctrl_status_undef = 0;
5340                         else
5341                                 /* Return most likely status. In fact, it
5342                                  * might be the only possible status */
5343                                 status = TP_EC_FAN_AUTO;
5344                 }
5345
5346                 len += sprintf(p + len, "status:\t\t%s\n",
5347                                (status != 0) ? "enabled" : "disabled");
5348
5349                 rc = fan_get_speed(&speed);
5350                 if (rc < 0)
5351                         return rc;
5352
5353                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5354
5355                 if (status & TP_EC_FAN_FULLSPEED)
5356                         /* Disengaged mode takes precedence */
5357                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5358                 else if (status & TP_EC_FAN_AUTO)
5359                         len += sprintf(p + len, "level:\t\tauto\n");
5360                 else
5361                         len += sprintf(p + len, "level:\t\t%d\n", status);
5362                 break;
5363
5364         case TPACPI_FAN_NONE:
5365         default:
5366                 len += sprintf(p + len, "status:\t\tnot supported\n");
5367         }
5368
5369         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5370                 len += sprintf(p + len, "commands:\tlevel <level>");
5371
5372                 switch (fan_control_access_mode) {
5373                 case TPACPI_FAN_WR_ACPI_SFAN:
5374                         len += sprintf(p + len, " (<level> is 0-7)\n");
5375                         break;
5376
5377                 default:
5378                         len += sprintf(p + len, " (<level> is 0-7, "
5379                                        "auto, disengaged, full-speed)\n");
5380                         break;
5381                 }
5382         }
5383
5384         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5385                 len += sprintf(p + len, "commands:\tenable, disable\n"
5386                                "commands:\twatchdog <timeout> (<timeout> "
5387                                "is 0 (off), 1-120 (seconds))\n");
5388
5389         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5390                 len += sprintf(p + len, "commands:\tspeed <speed>"
5391                                " (<speed> is 0-65535)\n");
5392
5393         return len;
5394 }
5395
5396 static int fan_write_cmd_level(const char *cmd, int *rc)
5397 {
5398         int level;
5399
5400         if (strlencmp(cmd, "level auto") == 0)
5401                 level = TP_EC_FAN_AUTO;
5402         else if ((strlencmp(cmd, "level disengaged") == 0) |
5403                         (strlencmp(cmd, "level full-speed") == 0))
5404                 level = TP_EC_FAN_FULLSPEED;
5405         else if (sscanf(cmd, "level %d", &level) != 1)
5406                 return 0;
5407
5408         *rc = fan_set_level_safe(level);
5409         if (*rc == -ENXIO)
5410                 printk(TPACPI_ERR "level command accepted for unsupported "
5411                        "access mode %d", fan_control_access_mode);
5412
5413         return 1;
5414 }
5415
5416 static int fan_write_cmd_enable(const char *cmd, int *rc)
5417 {
5418         if (strlencmp(cmd, "enable") != 0)
5419                 return 0;
5420
5421         *rc = fan_set_enable();
5422         if (*rc == -ENXIO)
5423                 printk(TPACPI_ERR "enable command accepted for unsupported "
5424                        "access mode %d", fan_control_access_mode);
5425
5426         return 1;
5427 }
5428
5429 static int fan_write_cmd_disable(const char *cmd, int *rc)
5430 {
5431         if (strlencmp(cmd, "disable") != 0)
5432                 return 0;
5433
5434         *rc = fan_set_disable();
5435         if (*rc == -ENXIO)
5436                 printk(TPACPI_ERR "disable command accepted for unsupported "
5437                        "access mode %d", fan_control_access_mode);
5438
5439         return 1;
5440 }
5441
5442 static int fan_write_cmd_speed(const char *cmd, int *rc)
5443 {
5444         int speed;
5445
5446         /* TODO:
5447          * Support speed <low> <medium> <high> ? */
5448
5449         if (sscanf(cmd, "speed %d", &speed) != 1)
5450                 return 0;
5451
5452         *rc = fan_set_speed(speed);
5453         if (*rc == -ENXIO)
5454                 printk(TPACPI_ERR "speed command accepted for unsupported "
5455                        "access mode %d", fan_control_access_mode);
5456
5457         return 1;
5458 }
5459
5460 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5461 {
5462         int interval;
5463
5464         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5465                 return 0;
5466
5467         if (interval < 0 || interval > 120)
5468                 *rc = -EINVAL;
5469         else
5470                 fan_watchdog_maxinterval = interval;
5471
5472         return 1;
5473 }
5474
5475 static int fan_write(char *buf)
5476 {
5477         char *cmd;
5478         int rc = 0;
5479
5480         while (!rc && (cmd = next_cmd(&buf))) {
5481                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5482                       fan_write_cmd_level(cmd, &rc)) &&
5483                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5484                       (fan_write_cmd_enable(cmd, &rc) ||
5485                        fan_write_cmd_disable(cmd, &rc) ||
5486                        fan_write_cmd_watchdog(cmd, &rc))) &&
5487                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5488                       fan_write_cmd_speed(cmd, &rc))
5489                     )
5490                         rc = -EINVAL;
5491                 else if (!rc)
5492                         fan_watchdog_reset();
5493         }
5494
5495         return rc;
5496 }
5497
5498 static struct ibm_struct fan_driver_data = {
5499         .name = "fan",
5500         .read = fan_read,
5501         .write = fan_write,
5502         .exit = fan_exit,
5503 };
5504
5505 /****************************************************************************
5506  ****************************************************************************
5507  *
5508  * Infrastructure
5509  *
5510  ****************************************************************************
5511  ****************************************************************************/
5512
5513 /* sysfs name ---------------------------------------------------------- */
5514 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5515                            struct device_attribute *attr,
5516                            char *buf)
5517 {
5518         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5519 }
5520
5521 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5522         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5523
5524 /* --------------------------------------------------------------------- */
5525
5526 /* /proc support */
5527 static struct proc_dir_entry *proc_dir;
5528
5529 /*
5530  * Module and infrastructure proble, init and exit handling
5531  */
5532
5533 static int force_load;
5534
5535 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5536 static const char * __init str_supported(int is_supported)
5537 {
5538         static char text_unsupported[] __initdata = "not supported";
5539
5540         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5541 }
5542 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5543
5544 static void ibm_exit(struct ibm_struct *ibm)
5545 {
5546         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5547
5548         list_del_init(&ibm->all_drivers);
5549
5550         if (ibm->flags.acpi_notify_installed) {
5551                 dbg_printk(TPACPI_DBG_EXIT,
5552                         "%s: acpi_remove_notify_handler\n", ibm->name);
5553                 BUG_ON(!ibm->acpi);
5554                 acpi_remove_notify_handler(*ibm->acpi->handle,
5555                                            ibm->acpi->type,
5556                                            dispatch_acpi_notify);
5557                 ibm->flags.acpi_notify_installed = 0;
5558                 ibm->flags.acpi_notify_installed = 0;
5559         }
5560
5561         if (ibm->flags.proc_created) {
5562                 dbg_printk(TPACPI_DBG_EXIT,
5563                         "%s: remove_proc_entry\n", ibm->name);
5564                 remove_proc_entry(ibm->name, proc_dir);
5565                 ibm->flags.proc_created = 0;
5566         }
5567
5568         if (ibm->flags.acpi_driver_registered) {
5569                 dbg_printk(TPACPI_DBG_EXIT,
5570                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5571                 BUG_ON(!ibm->acpi);
5572                 acpi_bus_unregister_driver(ibm->acpi->driver);
5573                 kfree(ibm->acpi->driver);
5574                 ibm->acpi->driver = NULL;
5575                 ibm->flags.acpi_driver_registered = 0;
5576         }
5577
5578         if (ibm->flags.init_called && ibm->exit) {
5579                 ibm->exit();
5580                 ibm->flags.init_called = 0;
5581         }
5582
5583         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5584 }
5585
5586 static int __init ibm_init(struct ibm_init_struct *iibm)
5587 {
5588         int ret;
5589         struct ibm_struct *ibm = iibm->data;
5590         struct proc_dir_entry *entry;
5591
5592         BUG_ON(ibm == NULL);
5593
5594         INIT_LIST_HEAD(&ibm->all_drivers);
5595
5596         if (ibm->flags.experimental && !experimental)
5597                 return 0;
5598
5599         dbg_printk(TPACPI_DBG_INIT,
5600                 "probing for %s\n", ibm->name);
5601
5602         if (iibm->init) {
5603                 ret = iibm->init(iibm);
5604                 if (ret > 0)
5605                         return 0;       /* probe failed */
5606                 if (ret)
5607                         return ret;
5608
5609                 ibm->flags.init_called = 1;
5610         }
5611
5612         if (ibm->acpi) {
5613                 if (ibm->acpi->hid) {
5614                         ret = register_tpacpi_subdriver(ibm);
5615                         if (ret)
5616                                 goto err_out;
5617                 }
5618
5619                 if (ibm->acpi->notify) {
5620                         ret = setup_acpi_notify(ibm);
5621                         if (ret == -ENODEV) {
5622                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5623                                         ibm->name);
5624                                 ret = 0;
5625                                 goto err_out;
5626                         }
5627                         if (ret < 0)
5628                                 goto err_out;
5629                 }
5630         }
5631
5632         dbg_printk(TPACPI_DBG_INIT,
5633                 "%s installed\n", ibm->name);
5634
5635         if (ibm->read) {
5636                 entry = create_proc_entry(ibm->name,
5637                                           S_IFREG | S_IRUGO | S_IWUSR,
5638                                           proc_dir);
5639                 if (!entry) {
5640                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5641                                ibm->name);
5642                         ret = -ENODEV;
5643                         goto err_out;
5644                 }
5645                 entry->owner = THIS_MODULE;
5646                 entry->data = ibm;
5647                 entry->read_proc = &dispatch_procfs_read;
5648                 if (ibm->write)
5649                         entry->write_proc = &dispatch_procfs_write;
5650                 ibm->flags.proc_created = 1;
5651         }
5652
5653         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5654
5655         return 0;
5656
5657 err_out:
5658         dbg_printk(TPACPI_DBG_INIT,
5659                 "%s: at error exit path with result %d\n",
5660                 ibm->name, ret);
5661
5662         ibm_exit(ibm);
5663         return (ret < 0)? ret : 0;
5664 }
5665
5666 /* Probing */
5667
5668 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5669 {
5670         const struct dmi_device *dev = NULL;
5671         char ec_fw_string[18];
5672
5673         if (!tp)
5674                 return;
5675
5676         memset(tp, 0, sizeof(*tp));
5677
5678         if (dmi_name_in_vendors("IBM"))
5679                 tp->vendor = PCI_VENDOR_ID_IBM;
5680         else if (dmi_name_in_vendors("LENOVO"))
5681                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5682         else
5683                 return;
5684
5685         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5686                                         GFP_KERNEL);
5687         if (!tp->bios_version_str)
5688                 return;
5689         tp->bios_model = tp->bios_version_str[0]
5690                          | (tp->bios_version_str[1] << 8);
5691
5692         /*
5693          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5694          * X32 or newer, all Z series;  Some models must have an
5695          * up-to-date BIOS or they will not be detected.
5696          *
5697          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5698          */
5699         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5700                 if (sscanf(dev->name,
5701                            "IBM ThinkPad Embedded Controller -[%17c",
5702                            ec_fw_string) == 1) {
5703                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5704                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5705
5706                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5707                         tp->ec_model = ec_fw_string[0]
5708                                         | (ec_fw_string[1] << 8);
5709                         break;
5710                 }
5711         }
5712
5713         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5714                                         GFP_KERNEL);
5715         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5716                 kfree(tp->model_str);
5717                 tp->model_str = NULL;
5718         }
5719 }
5720
5721 static int __init probe_for_thinkpad(void)
5722 {
5723         int is_thinkpad;
5724
5725         if (acpi_disabled)
5726                 return -ENODEV;
5727
5728         /*
5729          * Non-ancient models have better DMI tagging, but very old models
5730          * don't.
5731          */
5732         is_thinkpad = (thinkpad_id.model_str != NULL);
5733
5734         /* ec is required because many other handles are relative to it */
5735         TPACPI_ACPIHANDLE_INIT(ec);
5736         if (!ec_handle) {
5737                 if (is_thinkpad)
5738                         printk(TPACPI_ERR
5739                                 "Not yet supported ThinkPad detected!\n");
5740                 return -ENODEV;
5741         }
5742
5743         /*
5744          * Risks a regression on very old machines, but reduces potential
5745          * false positives a damn great deal
5746          */
5747         if (!is_thinkpad)
5748                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5749
5750         if (!is_thinkpad && !force_load)
5751                 return -ENODEV;
5752
5753         return 0;
5754 }
5755
5756
5757 /* Module init, exit, parameters */
5758
5759 static struct ibm_init_struct ibms_init[] __initdata = {
5760         {
5761                 .init = thinkpad_acpi_driver_init,
5762                 .data = &thinkpad_acpi_driver_data,
5763         },
5764         {
5765                 .init = hotkey_init,
5766                 .data = &hotkey_driver_data,
5767         },
5768         {
5769                 .init = bluetooth_init,
5770                 .data = &bluetooth_driver_data,
5771         },
5772         {
5773                 .init = wan_init,
5774                 .data = &wan_driver_data,
5775         },
5776         {
5777                 .init = video_init,
5778                 .data = &video_driver_data,
5779         },
5780         {
5781                 .init = light_init,
5782                 .data = &light_driver_data,
5783         },
5784 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5785         {
5786                 .init = dock_init,
5787                 .data = &dock_driver_data[0],
5788         },
5789         {
5790                 .init = dock_init2,
5791                 .data = &dock_driver_data[1],
5792         },
5793 #endif
5794 #ifdef CONFIG_THINKPAD_ACPI_BAY
5795         {
5796                 .init = bay_init,
5797                 .data = &bay_driver_data,
5798         },
5799 #endif
5800         {
5801                 .init = cmos_init,
5802                 .data = &cmos_driver_data,
5803         },
5804         {
5805                 .init = led_init,
5806                 .data = &led_driver_data,
5807         },
5808         {
5809                 .init = beep_init,
5810                 .data = &beep_driver_data,
5811         },
5812         {
5813                 .init = thermal_init,
5814                 .data = &thermal_driver_data,
5815         },
5816         {
5817                 .data = &ecdump_driver_data,
5818         },
5819         {
5820                 .init = brightness_init,
5821                 .data = &brightness_driver_data,
5822         },
5823         {
5824                 .data = &volume_driver_data,
5825         },
5826         {
5827                 .init = fan_init,
5828                 .data = &fan_driver_data,
5829         },
5830 };
5831
5832 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5833 {
5834         unsigned int i;
5835         struct ibm_struct *ibm;
5836
5837         if (!kp || !kp->name || !val)
5838                 return -EINVAL;
5839
5840         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5841                 ibm = ibms_init[i].data;
5842                 WARN_ON(ibm == NULL);
5843
5844                 if (!ibm || !ibm->name)
5845                         continue;
5846
5847                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5848                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5849                                 return -ENOSPC;
5850                         strcpy(ibms_init[i].param, val);
5851                         strcat(ibms_init[i].param, ",");
5852                         return 0;
5853                 }
5854         }
5855
5856         return -EINVAL;
5857 }
5858
5859 module_param(experimental, int, 0);
5860 MODULE_PARM_DESC(experimental,
5861                  "Enables experimental features when non-zero");
5862
5863 module_param_named(debug, dbg_level, uint, 0);
5864 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5865
5866 module_param(force_load, bool, 0);
5867 MODULE_PARM_DESC(force_load,
5868                  "Attempts to load the driver even on a "
5869                  "mis-identified ThinkPad when true");
5870
5871 module_param_named(fan_control, fan_control_allowed, bool, 0);
5872 MODULE_PARM_DESC(fan_control,
5873                  "Enables setting fan parameters features when true");
5874
5875 module_param_named(brightness_mode, brightness_mode, int, 0);
5876 MODULE_PARM_DESC(brightness_mode,
5877                  "Selects brightness control strategy: "
5878                  "0=auto, 1=EC, 2=CMOS, 3=both");
5879
5880 module_param(brightness_enable, uint, 0);
5881 MODULE_PARM_DESC(brightness_enable,
5882                  "Enables backlight control when 1, disables when 0");
5883
5884 module_param(hotkey_report_mode, uint, 0);
5885 MODULE_PARM_DESC(hotkey_report_mode,
5886                  "used for backwards compatibility with userspace, "
5887                  "see documentation");
5888
5889 #define TPACPI_PARAM(feature) \
5890         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
5891         MODULE_PARM_DESC(feature, "Simulates thinkpad-aci procfs command " \
5892                          "at module load, see documentation")
5893
5894 TPACPI_PARAM(hotkey);
5895 TPACPI_PARAM(bluetooth);
5896 TPACPI_PARAM(video);
5897 TPACPI_PARAM(light);
5898 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5899 TPACPI_PARAM(dock);
5900 #endif
5901 #ifdef CONFIG_THINKPAD_ACPI_BAY
5902 TPACPI_PARAM(bay);
5903 #endif /* CONFIG_THINKPAD_ACPI_BAY */
5904 TPACPI_PARAM(cmos);
5905 TPACPI_PARAM(led);
5906 TPACPI_PARAM(beep);
5907 TPACPI_PARAM(ecdump);
5908 TPACPI_PARAM(brightness);
5909 TPACPI_PARAM(volume);
5910 TPACPI_PARAM(fan);
5911
5912 static void thinkpad_acpi_module_exit(void)
5913 {
5914         struct ibm_struct *ibm, *itmp;
5915
5916         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5917
5918         list_for_each_entry_safe_reverse(ibm, itmp,
5919                                          &tpacpi_all_drivers,
5920                                          all_drivers) {
5921                 ibm_exit(ibm);
5922         }
5923
5924         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5925
5926         if (tpacpi_inputdev) {
5927                 if (tp_features.input_device_registered)
5928                         input_unregister_device(tpacpi_inputdev);
5929                 else
5930                         input_free_device(tpacpi_inputdev);
5931         }
5932
5933         if (tpacpi_hwmon)
5934                 hwmon_device_unregister(tpacpi_hwmon);
5935
5936         if (tp_features.sensors_pdev_attrs_registered)
5937                 device_remove_file(&tpacpi_sensors_pdev->dev,
5938                                    &dev_attr_thinkpad_acpi_pdev_name);
5939         if (tpacpi_sensors_pdev)
5940                 platform_device_unregister(tpacpi_sensors_pdev);
5941         if (tpacpi_pdev)
5942                 platform_device_unregister(tpacpi_pdev);
5943
5944         if (tp_features.sensors_pdrv_attrs_registered)
5945                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5946         if (tp_features.platform_drv_attrs_registered)
5947                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5948
5949         if (tp_features.sensors_pdrv_registered)
5950                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5951
5952         if (tp_features.platform_drv_registered)
5953                 platform_driver_unregister(&tpacpi_pdriver);
5954
5955         if (proc_dir)
5956                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
5957
5958         kfree(thinkpad_id.bios_version_str);
5959         kfree(thinkpad_id.ec_version_str);
5960         kfree(thinkpad_id.model_str);
5961 }
5962
5963
5964 static int __init thinkpad_acpi_module_init(void)
5965 {
5966         int ret, i;
5967
5968         tpacpi_lifecycle = TPACPI_LIFE_INIT;
5969
5970         /* Parameter checking */
5971         if (hotkey_report_mode > 2)
5972                 return -EINVAL;
5973
5974         /* Driver-level probe */
5975
5976         get_thinkpad_model_data(&thinkpad_id);
5977         ret = probe_for_thinkpad();
5978         if (ret) {
5979                 thinkpad_acpi_module_exit();
5980                 return ret;
5981         }
5982
5983         /* Driver initialization */
5984
5985         TPACPI_ACPIHANDLE_INIT(ecrd);
5986         TPACPI_ACPIHANDLE_INIT(ecwr);
5987
5988         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
5989         if (!proc_dir) {
5990                 printk(TPACPI_ERR
5991                        "unable to create proc dir " TPACPI_PROC_DIR);
5992                 thinkpad_acpi_module_exit();
5993                 return -ENODEV;
5994         }
5995         proc_dir->owner = THIS_MODULE;
5996
5997         ret = platform_driver_register(&tpacpi_pdriver);
5998         if (ret) {
5999                 printk(TPACPI_ERR
6000                        "unable to register main platform driver\n");
6001                 thinkpad_acpi_module_exit();
6002                 return ret;
6003         }
6004         tp_features.platform_drv_registered = 1;
6005
6006         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6007         if (ret) {
6008                 printk(TPACPI_ERR
6009                        "unable to register hwmon platform driver\n");
6010                 thinkpad_acpi_module_exit();
6011                 return ret;
6012         }
6013         tp_features.sensors_pdrv_registered = 1;
6014
6015         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6016         if (!ret) {
6017                 tp_features.platform_drv_attrs_registered = 1;
6018                 ret = tpacpi_create_driver_attributes(
6019                                         &tpacpi_hwmon_pdriver.driver);
6020         }
6021         if (ret) {
6022                 printk(TPACPI_ERR
6023                        "unable to create sysfs driver attributes\n");
6024                 thinkpad_acpi_module_exit();
6025                 return ret;
6026         }
6027         tp_features.sensors_pdrv_attrs_registered = 1;
6028
6029
6030         /* Device initialization */
6031         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6032                                                         NULL, 0);
6033         if (IS_ERR(tpacpi_pdev)) {
6034                 ret = PTR_ERR(tpacpi_pdev);
6035                 tpacpi_pdev = NULL;
6036                 printk(TPACPI_ERR "unable to register platform device\n");
6037                 thinkpad_acpi_module_exit();
6038                 return ret;
6039         }
6040         tpacpi_sensors_pdev = platform_device_register_simple(
6041                                                 TPACPI_HWMON_DRVR_NAME,
6042                                                 -1, NULL, 0);
6043         if (IS_ERR(tpacpi_sensors_pdev)) {
6044                 ret = PTR_ERR(tpacpi_sensors_pdev);
6045                 tpacpi_sensors_pdev = NULL;
6046                 printk(TPACPI_ERR
6047                        "unable to register hwmon platform device\n");
6048                 thinkpad_acpi_module_exit();
6049                 return ret;
6050         }
6051         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6052                                  &dev_attr_thinkpad_acpi_pdev_name);
6053         if (ret) {
6054                 printk(TPACPI_ERR
6055                        "unable to create sysfs hwmon device attributes\n");
6056                 thinkpad_acpi_module_exit();
6057                 return ret;
6058         }
6059         tp_features.sensors_pdev_attrs_registered = 1;
6060         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6061         if (IS_ERR(tpacpi_hwmon)) {
6062                 ret = PTR_ERR(tpacpi_hwmon);
6063                 tpacpi_hwmon = NULL;
6064                 printk(TPACPI_ERR "unable to register hwmon device\n");
6065                 thinkpad_acpi_module_exit();
6066                 return ret;
6067         }
6068         mutex_init(&tpacpi_inputdev_send_mutex);
6069         tpacpi_inputdev = input_allocate_device();
6070         if (!tpacpi_inputdev) {
6071                 printk(TPACPI_ERR "unable to allocate input device\n");
6072                 thinkpad_acpi_module_exit();
6073                 return -ENOMEM;
6074         } else {
6075                 /* Prepare input device, but don't register */
6076                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6077                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6078                 tpacpi_inputdev->id.bustype = BUS_HOST;
6079                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6080                                                 thinkpad_id.vendor :
6081                                                 PCI_VENDOR_ID_IBM;
6082                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6083                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6084         }
6085         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6086                 ret = ibm_init(&ibms_init[i]);
6087                 if (ret >= 0 && *ibms_init[i].param)
6088                         ret = ibms_init[i].data->write(ibms_init[i].param);
6089                 if (ret < 0) {
6090                         thinkpad_acpi_module_exit();
6091                         return ret;
6092                 }
6093         }
6094         ret = input_register_device(tpacpi_inputdev);
6095         if (ret < 0) {
6096                 printk(TPACPI_ERR "unable to register input device\n");
6097                 thinkpad_acpi_module_exit();
6098                 return ret;
6099         } else {
6100                 tp_features.input_device_registered = 1;
6101         }
6102
6103         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6104         return 0;
6105 }
6106
6107 /* Please remove this in year 2009 */
6108 MODULE_ALIAS("ibm_acpi");
6109
6110 /*
6111  * DMI matching for module autoloading
6112  *
6113  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6114  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6115  *
6116  * Only models listed in thinkwiki will be supported, so add yours
6117  * if it is not there yet.
6118  */
6119 #define IBM_BIOS_MODULE_ALIAS(__type) \
6120         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6121
6122 /* Non-ancient thinkpads */
6123 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6124 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6125
6126 /* Ancient thinkpad BIOSes have to be identified by
6127  * BIOS type or model number, and there are far less
6128  * BIOS types than model numbers... */
6129 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6130 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6131 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6132
6133 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6134 MODULE_DESCRIPTION(TPACPI_DESC);
6135 MODULE_VERSION(TPACPI_VERSION);
6136 MODULE_LICENSE("GPL");
6137
6138 module_init(thinkpad_acpi_module_init);
6139 module_exit(thinkpad_acpi_module_exit);