drivers/platform/x86/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) 2006-2009 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 "0.23"
  25 #define TPACPI_SYSFS_VERSION 0x020400
  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/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /****************************************************************************
 149  * Main driver
 150  */
 151
 152 #define TPACPI_NAME "thinkpad"
 153 #define TPACPI_DESC "ThinkPad ACPI Extras"
 154 #define TPACPI_FILE TPACPI_NAME "_acpi"
 155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 157
 158 #define TPACPI_PROC_DIR "ibm"
 159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 160 #define TPACPI_DRVR_NAME TPACPI_FILE
 161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 163
 164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 166
 167 #define TPACPI_MAX_ACPI_ARGS 3
 168
 169 /* printk headers */
 170 #define TPACPI_LOG TPACPI_FILE ": "
 171 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 172 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 173 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 174 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 175 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 176 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 177 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 178 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 179
 180 /* Debugging printk groups */
 181 #define TPACPI_DBG_ALL          0xffff
 182 #define TPACPI_DBG_DISCLOSETASK 0x8000
 183 #define TPACPI_DBG_INIT         0x0001
 184 #define TPACPI_DBG_EXIT         0x0002
 185 #define TPACPI_DBG_RFKILL       0x0004
 186 #define TPACPI_DBG_HKEY         0x0008
 187 #define TPACPI_DBG_FAN          0x0010
 188 #define TPACPI_DBG_BRGHT        0x0020
 189
 190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 193
 194
 195 /****************************************************************************
 196  * Driver-wide structs and misc. variables
 197  */
 198
 199 struct ibm_struct;
 200
 201 struct tp_acpi_drv_struct {
 202         const struct acpi_device_id *hid;
 203         struct acpi_driver *driver;
 204
 205         void (*notify) (struct ibm_struct *, u32);
 206         acpi_handle *handle;
 207         u32 type;
 208         struct acpi_device *device;
 209 };
 210
 211 struct ibm_struct {
 212         char *name;
 213
 214         int (*read) (char *);
 215         int (*write) (char *);
 216         void (*exit) (void);
 217         void (*resume) (void);
 218         void (*suspend) (pm_message_t state);
 219         void (*shutdown) (void);
 220
 221         struct list_head all_drivers;
 222
 223         struct tp_acpi_drv_struct *acpi;
 224
 225         struct {
 226                 u8 acpi_driver_registered:1;
 227                 u8 acpi_notify_installed:1;
 228                 u8 proc_created:1;
 229                 u8 init_called:1;
 230                 u8 experimental:1;
 231         } flags;
 232 };
 233
 234 struct ibm_init_struct {
 235         char param[32];
 236
 237         int (*init) (struct ibm_init_struct *);
 238         struct ibm_struct *data;
 239 };
 240
 241 static struct {
 242         u32 bluetooth:1;
 243         u32 hotkey:1;
 244         u32 hotkey_mask:1;
 245         u32 hotkey_wlsw:1;
 246         u32 hotkey_tablet:1;
 247         u32 light:1;
 248         u32 light_status:1;
 249         u32 bright_16levels:1;
 250         u32 bright_acpimode:1;
 251         u32 wan:1;
 252         u32 uwb:1;
 253         u32 fan_ctrl_status_undef:1;
 254         u32 second_fan:1;
 255         u32 beep_needs_two_args:1;
 256         u32 input_device_registered:1;
 257         u32 platform_drv_registered:1;
 258         u32 platform_drv_attrs_registered:1;
 259         u32 sensors_pdrv_registered:1;
 260         u32 sensors_pdrv_attrs_registered:1;
 261         u32 sensors_pdev_attrs_registered:1;
 262         u32 hotkey_poll_active:1;
 263 } tp_features;
 264
 265 static struct {
 266         u16 hotkey_mask_ff:1;
 267 } tp_warned;
 268
 269 struct thinkpad_id_data {
 270         unsigned int vendor;    /* ThinkPad vendor:
 271                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 272
 273         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 274         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 275
 276         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 277         u16 ec_model;
 278         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 279         u16 ec_release;
 280
 281         char *model_str;        /* ThinkPad T43 */
 282         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 283 };
 284 static struct thinkpad_id_data thinkpad_id;
 285
 286 static enum {
 287         TPACPI_LIFE_INIT = 0,
 288         TPACPI_LIFE_RUNNING,
 289         TPACPI_LIFE_EXITING,
 290 } tpacpi_lifecycle;
 291
 292 static int experimental;
 293 static u32 dbg_level;
 294
 295 static struct workqueue_struct *tpacpi_wq;
 296
 297 enum led_status_t {
 298         TPACPI_LED_OFF = 0,
 299         TPACPI_LED_ON,
 300         TPACPI_LED_BLINK,
 301 };
 302
 303 /* Special LED class that can defer work */
 304 struct tpacpi_led_classdev {
 305         struct led_classdev led_classdev;
 306         struct work_struct work;
 307         enum led_status_t new_state;
 308         unsigned int led;
 309 };
 310
 311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 312 static int dbg_wlswemul;
 313 static int tpacpi_wlsw_emulstate;
 314 static int dbg_bluetoothemul;
 315 static int tpacpi_bluetooth_emulstate;
 316 static int dbg_wwanemul;
 317 static int tpacpi_wwan_emulstate;
 318 static int dbg_uwbemul;
 319 static int tpacpi_uwb_emulstate;
 320 #endif
 321
 322
 323 /*************************************************************************
 324  *  Debugging helpers
 325  */
 326
 327 #define dbg_printk(a_dbg_level, format, arg...) \
 328         do { if (dbg_level & (a_dbg_level)) \
 329                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 330         } while (0)
 331
 332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 333 #define vdbg_printk dbg_printk
 334 static const char *str_supported(int is_supported);
 335 #else
 336 #define vdbg_printk(a_dbg_level, format, arg...) \
 337         do { } while (0)
 338 #endif
 339
 340 static void tpacpi_log_usertask(const char * const what)
 341 {
 342         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 343                 what, task_tgid_vnr(current));
 344 }
 345
 346 #define tpacpi_disclose_usertask(what, format, arg...) \
 347         do { \
 348                 if (unlikely( \
 349                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 350                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 351                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 352                                 what, task_tgid_vnr(current), ## arg); \
 353                 } \
 354         } while (0)
 355
 356 /*
 357  * Quirk handling helpers
 358  *
 359  * ThinkPad IDs and versions seen in the field so far
 360  * are two-characters from the set [0-9A-Z], i.e. base 36.
 361  *
 362  * We use values well outside that range as specials.
 363  */
 364
 365 #define TPACPI_MATCH_ANY                0xffffU
 366 #define TPACPI_MATCH_UNKNOWN            0U
 367
 368 /* TPID('1', 'Y') == 0x5931 */
 369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 370
 371 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 372         { .vendor = PCI_VENDOR_ID_IBM,          \
 373           .bios = TPID(__id1, __id2),           \
 374           .ec = TPACPI_MATCH_ANY,               \
 375           .quirks = (__quirk) }
 376
 377 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 378         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 379           .bios = TPID(__id1, __id2),           \
 380           .ec = TPACPI_MATCH_ANY,               \
 381           .quirks = (__quirk) }
 382
 383 struct tpacpi_quirk {
 384         unsigned int vendor;
 385         u16 bios;
 386         u16 ec;
 387         unsigned long quirks;
 388 };
 389
 390 /**
 391  * tpacpi_check_quirks() - search BIOS/EC version on a list
 392  * @qlist:              array of &struct tpacpi_quirk
 393  * @qlist_size:         number of elements in @qlist
 394  *
 395  * Iterates over a quirks list until one is found that matches the
 396  * ThinkPad's vendor, BIOS and EC model.
 397  *
 398  * Returns 0 if nothing matches, otherwise returns the quirks field of
 399  * the matching &struct tpacpi_quirk entry.
 400  *
 401  * The match criteria is: vendor, ec and bios much match.
 402  */
 403 static unsigned long __init tpacpi_check_quirks(
 404                         const struct tpacpi_quirk *qlist,
 405                         unsigned int qlist_size)
 406 {
 407         while (qlist_size) {
 408                 if ((qlist->vendor == thinkpad_id.vendor ||
 409                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 410                     (qlist->bios == thinkpad_id.bios_model ||
 411                                 qlist->bios == TPACPI_MATCH_ANY) &&
 412                     (qlist->ec == thinkpad_id.ec_model ||
 413                                 qlist->ec == TPACPI_MATCH_ANY))
 414                         return qlist->quirks;
 415
 416                 qlist_size--;
 417                 qlist++;
 418         }
 419         return 0;
 420 }
 421
 422
 423 /****************************************************************************
 424  ****************************************************************************
 425  *
 426  * ACPI Helpers and device model
 427  *
 428  ****************************************************************************
 429  ****************************************************************************/
 430
 431 /*************************************************************************
 432  * ACPI basic handles
 433  */
 434
 435 static acpi_handle root_handle;
 436
 437 #define TPACPI_HANDLE(object, parent, paths...)                 \
 438         static acpi_handle  object##_handle;                    \
 439         static acpi_handle *object##_parent = &parent##_handle; \
 440         static char        *object##_path;                      \
 441         static char        *object##_paths[] = { paths }
 442
 443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 444            "\\_SB.PCI.ISA.EC",  /* 570 */
 445            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 446            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 447            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 448            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 449            "\\_SB.PCI0.LPC.EC", /* all others */
 450            );
 451
 452 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 453 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 454
 455 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 456                                         /* T4x, X31, X40 */
 457            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 458            "\\CMS",             /* R40, R40e */
 459            );                   /* all others */
 460
 461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 462            "^HKEY",             /* R30, R31 */
 463            "HKEY",              /* all others */
 464            );                   /* 570 */
 465
 466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 467            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 468            "\\_SB.PCI0.VID0",   /* 770e */
 469            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 470            "\\_SB.PCI0.AGP.VID",        /* all others */
 471            );                           /* R30, R31 */
 472
 473
 474 /*************************************************************************
 475  * ACPI helpers
 476  */
 477
 478 static int acpi_evalf(acpi_handle handle,
 479                       void *res, char *method, char *fmt, ...)
 480 {
 481         char *fmt0 = fmt;
 482         struct acpi_object_list params;
 483         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 484         struct acpi_buffer result, *resultp;
 485         union acpi_object out_obj;
 486         acpi_status status;
 487         va_list ap;
 488         char res_type;
 489         int success;
 490         int quiet;
 491
 492         if (!*fmt) {
 493                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 494                 return 0;
 495         }
 496
 497         if (*fmt == 'q') {
 498                 quiet = 1;
 499                 fmt++;
 500         } else
 501                 quiet = 0;
 502
 503         res_type = *(fmt++);
 504
 505         params.count = 0;
 506         params.pointer = &in_objs[0];
 507
 508         va_start(ap, fmt);
 509         while (*fmt) {
 510                 char c = *(fmt++);
 511                 switch (c) {
 512                 case 'd':       /* int */
 513                         in_objs[params.count].integer.value = va_arg(ap, int);
 514                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 515                         break;
 516                         /* add more types as needed */
 517                 default:
 518                         printk(TPACPI_ERR "acpi_evalf() called "
 519                                "with invalid format character '%c'\n", c);
 520                         return 0;
 521                 }
 522         }
 523         va_end(ap);
 524
 525         if (res_type != 'v') {
 526                 result.length = sizeof(out_obj);
 527                 result.pointer = &out_obj;
 528                 resultp = &result;
 529         } else
 530                 resultp = NULL;
 531
 532         status = acpi_evaluate_object(handle, method, &params, resultp);
 533
 534         switch (res_type) {
 535         case 'd':               /* int */
 536                 if (res)
 537                         *(int *)res = out_obj.integer.value;
 538                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 539                 break;
 540         case 'v':               /* void */
 541                 success = status == AE_OK;
 542                 break;
 543                 /* add more types as needed */
 544         default:
 545                 printk(TPACPI_ERR "acpi_evalf() called "
 546                        "with invalid format character '%c'\n", res_type);
 547                 return 0;
 548         }
 549
 550         if (!success && !quiet)
 551                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 552                        method, fmt0, status);
 553
 554         return success;
 555 }
 556
 557 static int acpi_ec_read(int i, u8 *p)
 558 {
 559         int v;
 560
 561         if (ecrd_handle) {
 562                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 563                         return 0;
 564                 *p = v;
 565         } else {
 566                 if (ec_read(i, p) < 0)
 567                         return 0;
 568         }
 569
 570         return 1;
 571 }
 572
 573 static int acpi_ec_write(int i, u8 v)
 574 {
 575         if (ecwr_handle) {
 576                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 577                         return 0;
 578         } else {
 579                 if (ec_write(i, v) < 0)
 580                         return 0;
 581         }
 582
 583         return 1;
 584 }
 585
 586 static int issue_thinkpad_cmos_command(int cmos_cmd)
 587 {
 588         if (!cmos_handle)
 589                 return -ENXIO;
 590
 591         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 592                 return -EIO;
 593
 594         return 0;
 595 }
 596
 597 /*************************************************************************
 598  * ACPI device model
 599  */
 600
 601 #define TPACPI_ACPIHANDLE_INIT(object) \
 602         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 603                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 604
 605 static void drv_acpi_handle_init(char *name,
 606                            acpi_handle *handle, acpi_handle parent,
 607                            char **paths, int num_paths, char **path)
 608 {
 609         int i;
 610         acpi_status status;
 611
 612         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 613                 name);
 614
 615         for (i = 0; i < num_paths; i++) {
 616                 status = acpi_get_handle(parent, paths[i], handle);
 617                 if (ACPI_SUCCESS(status)) {
 618                         *path = paths[i];
 619                         dbg_printk(TPACPI_DBG_INIT,
 620                                    "Found ACPI handle %s for %s\n",
 621                                    *path, name);
 622                         return;
 623                 }
 624         }
 625
 626         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 627                     name);
 628         *handle = NULL;
 629 }
 630
 631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 632 {
 633         struct ibm_struct *ibm = data;
 634
 635         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 636                 return;
 637
 638         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 639                 return;
 640
 641         ibm->acpi->notify(ibm, event);
 642 }
 643
 644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 645 {
 646         acpi_status status;
 647         int rc;
 648
 649         BUG_ON(!ibm->acpi);
 650
 651         if (!*ibm->acpi->handle)
 652                 return 0;
 653
 654         vdbg_printk(TPACPI_DBG_INIT,
 655                 "setting up ACPI notify for %s\n", ibm->name);
 656
 657         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 658         if (rc < 0) {
 659                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 660                         ibm->name, rc);
 661                 return -ENODEV;
 662         }
 663
 664         ibm->acpi->device->driver_data = ibm;
 665         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 666                 TPACPI_ACPI_EVENT_PREFIX,
 667                 ibm->name);
 668
 669         status = acpi_install_notify_handler(*ibm->acpi->handle,
 670                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 671         if (ACPI_FAILURE(status)) {
 672                 if (status == AE_ALREADY_EXISTS) {
 673                         printk(TPACPI_NOTICE
 674                                "another device driver is already "
 675                                "handling %s events\n", ibm->name);
 676                 } else {
 677                         printk(TPACPI_ERR
 678                                "acpi_install_notify_handler(%s) failed: %d\n",
 679                                ibm->name, status);
 680                 }
 681                 return -ENODEV;
 682         }
 683         ibm->flags.acpi_notify_installed = 1;
 684         return 0;
 685 }
 686
 687 static int __init tpacpi_device_add(struct acpi_device *device)
 688 {
 689         return 0;
 690 }
 691
 692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 693 {
 694         int rc;
 695
 696         dbg_printk(TPACPI_DBG_INIT,
 697                 "registering %s as an ACPI driver\n", ibm->name);
 698
 699         BUG_ON(!ibm->acpi);
 700
 701         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 702         if (!ibm->acpi->driver) {
 703                 printk(TPACPI_ERR
 704                        "failed to allocate memory for ibm->acpi->driver\n");
 705                 return -ENOMEM;
 706         }
 707
 708         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 709         ibm->acpi->driver->ids = ibm->acpi->hid;
 710
 711         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 712
 713         rc = acpi_bus_register_driver(ibm->acpi->driver);
 714         if (rc < 0) {
 715                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 716                        ibm->name, rc);
 717                 kfree(ibm->acpi->driver);
 718                 ibm->acpi->driver = NULL;
 719         } else if (!rc)
 720                 ibm->flags.acpi_driver_registered = 1;
 721
 722         return rc;
 723 }
 724
 725
 726 /****************************************************************************
 727  ****************************************************************************
 728  *
 729  * Procfs Helpers
 730  *
 731  ****************************************************************************
 732  ****************************************************************************/
 733
 734 static int dispatch_procfs_read(char *page, char **start, off_t off,
 735                         int count, int *eof, void *data)
 736 {
 737         struct ibm_struct *ibm = data;
 738         int len;
 739
 740         if (!ibm || !ibm->read)
 741                 return -EINVAL;
 742
 743         len = ibm->read(page);
 744         if (len < 0)
 745                 return len;
 746
 747         if (len <= off + count)
 748                 *eof = 1;
 749         *start = page + off;
 750         len -= off;
 751         if (len > count)
 752                 len = count;
 753         if (len < 0)
 754                 len = 0;
 755
 756         return len;
 757 }
 758
 759 static int dispatch_procfs_write(struct file *file,
 760                         const char __user *userbuf,
 761                         unsigned long count, void *data)
 762 {
 763         struct ibm_struct *ibm = data;
 764         char *kernbuf;
 765         int ret;
 766
 767         if (!ibm || !ibm->write)
 768                 return -EINVAL;
 769         if (count > PAGE_SIZE - 2)
 770                 return -EINVAL;
 771
 772         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 773         if (!kernbuf)
 774                 return -ENOMEM;
 775
 776         if (copy_from_user(kernbuf, userbuf, count)) {
 777                 kfree(kernbuf);
 778                 return -EFAULT;
 779         }
 780
 781         kernbuf[count] = 0;
 782         strcat(kernbuf, ",");
 783         ret = ibm->write(kernbuf);
 784         if (ret == 0)
 785                 ret = count;
 786
 787         kfree(kernbuf);
 788
 789         return ret;
 790 }
 791
 792 static char *next_cmd(char **cmds)
 793 {
 794         char *start = *cmds;
 795         char *end;
 796
 797         while ((end = strchr(start, ',')) && end == start)
 798                 start = end + 1;
 799
 800         if (!end)
 801                 return NULL;
 802
 803         *end = 0;
 804         *cmds = end + 1;
 805         return start;
 806 }
 807
 808
 809 /****************************************************************************
 810  ****************************************************************************
 811  *
 812  * Device model: input, hwmon and platform
 813  *
 814  ****************************************************************************
 815  ****************************************************************************/
 816
 817 static struct platform_device *tpacpi_pdev;
 818 static struct platform_device *tpacpi_sensors_pdev;
 819 static struct device *tpacpi_hwmon;
 820 static struct input_dev *tpacpi_inputdev;
 821 static struct mutex tpacpi_inputdev_send_mutex;
 822 static LIST_HEAD(tpacpi_all_drivers);
 823
 824 static int tpacpi_suspend_handler(struct platform_device *pdev,
 825                                   pm_message_t state)
 826 {
 827         struct ibm_struct *ibm, *itmp;
 828
 829         list_for_each_entry_safe(ibm, itmp,
 830                                  &tpacpi_all_drivers,
 831                                  all_drivers) {
 832                 if (ibm->suspend)
 833                         (ibm->suspend)(state);
 834         }
 835
 836         return 0;
 837 }
 838
 839 static int tpacpi_resume_handler(struct platform_device *pdev)
 840 {
 841         struct ibm_struct *ibm, *itmp;
 842
 843         list_for_each_entry_safe(ibm, itmp,
 844                                  &tpacpi_all_drivers,
 845                                  all_drivers) {
 846                 if (ibm->resume)
 847                         (ibm->resume)();
 848         }
 849
 850         return 0;
 851 }
 852
 853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 854 {
 855         struct ibm_struct *ibm, *itmp;
 856
 857         list_for_each_entry_safe(ibm, itmp,
 858                                  &tpacpi_all_drivers,
 859                                  all_drivers) {
 860                 if (ibm->shutdown)
 861                         (ibm->shutdown)();
 862         }
 863 }
 864
 865 static struct platform_driver tpacpi_pdriver = {
 866         .driver = {
 867                 .name = TPACPI_DRVR_NAME,
 868                 .owner = THIS_MODULE,
 869         },
 870         .suspend = tpacpi_suspend_handler,
 871         .resume = tpacpi_resume_handler,
 872         .shutdown = tpacpi_shutdown_handler,
 873 };
 874
 875 static struct platform_driver tpacpi_hwmon_pdriver = {
 876         .driver = {
 877                 .name = TPACPI_HWMON_DRVR_NAME,
 878                 .owner = THIS_MODULE,
 879         },
 880 };
 881
 882 /*************************************************************************
 883  * sysfs support helpers
 884  */
 885
 886 struct attribute_set {
 887         unsigned int members, max_members;
 888         struct attribute_group group;
 889 };
 890
 891 struct attribute_set_obj {
 892         struct attribute_set s;
 893         struct attribute *a;
 894 } __attribute__((packed));
 895
 896 static struct attribute_set *create_attr_set(unsigned int max_members,
 897                                                 const char *name)
 898 {
 899         struct attribute_set_obj *sobj;
 900
 901         if (max_members == 0)
 902                 return NULL;
 903
 904         /* Allocates space for implicit NULL at the end too */
 905         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 906                     max_members * sizeof(struct attribute *),
 907                     GFP_KERNEL);
 908         if (!sobj)
 909                 return NULL;
 910         sobj->s.max_members = max_members;
 911         sobj->s.group.attrs = &sobj->a;
 912         sobj->s.group.name = name;
 913
 914         return &sobj->s;
 915 }
 916
 917 #define destroy_attr_set(_set) \
 918         kfree(_set);
 919
 920 /* not multi-threaded safe, use it in a single thread per set */
 921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 922 {
 923         if (!s || !attr)
 924                 return -EINVAL;
 925
 926         if (s->members >= s->max_members)
 927                 return -ENOMEM;
 928
 929         s->group.attrs[s->members] = attr;
 930         s->members++;
 931
 932         return 0;
 933 }
 934
 935 static int add_many_to_attr_set(struct attribute_set *s,
 936                         struct attribute **attr,
 937                         unsigned int count)
 938 {
 939         int i, res;
 940
 941         for (i = 0; i < count; i++) {
 942                 res = add_to_attr_set(s, attr[i]);
 943                 if (res)
 944                         return res;
 945         }
 946
 947         return 0;
 948 }
 949
 950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 951 {
 952         sysfs_remove_group(kobj, &s->group);
 953         destroy_attr_set(s);
 954 }
 955
 956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 957         sysfs_create_group(_kobj, &_attr_set->group)
 958
 959 static int parse_strtoul(const char *buf,
 960                 unsigned long max, unsigned long *value)
 961 {
 962         char *endp;
 963
 964         while (*buf && isspace(*buf))
 965                 buf++;
 966         *value = simple_strtoul(buf, &endp, 0);
 967         while (*endp && isspace(*endp))
 968                 endp++;
 969         if (*endp || *value > max)
 970                 return -EINVAL;
 971
 972         return 0;
 973 }
 974
 975 static void tpacpi_disable_brightness_delay(void)
 976 {
 977         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 978                 printk(TPACPI_NOTICE
 979                         "ACPI backlight control delay disabled\n");
 980 }
 981
 982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 983 {
 984         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 985         union acpi_object *obj;
 986         int rc;
 987
 988         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 989                 obj = (union acpi_object *)buffer.pointer;
 990                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 991                         printk(TPACPI_ERR "Unknown _BCL data, "
 992                                "please report this to %s\n", TPACPI_MAIL);
 993                         rc = 0;
 994                 } else {
 995                         rc = obj->package.count;
 996                 }
 997         } else {
 998                 return 0;
 999         }
1000
1001         kfree(buffer.pointer);
1002         return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006                                         u32 lvl, void *context, void **rv)
1007 {
1008         char name[ACPI_PATH_SEGMENT_LENGTH];
1009         struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012             !strncmp("_BCL", name, sizeof(name) - 1)) {
1013                 BUG_ON(!rv || !*rv);
1014                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015                 return AE_CTRL_TERMINATE;
1016         } else {
1017                 return AE_OK;
1018         }
1019 }
1020
1021 /*
1022  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023  */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026         int status;
1027         int bcl_levels = 0;
1028         void *bcl_ptr = &bcl_levels;
1029
1030         if (!vid_handle) {
1031                 TPACPI_ACPIHANDLE_INIT(vid);
1032         }
1033         if (!vid_handle)
1034                 return 0;
1035
1036         /*
1037          * Search for a _BCL method, and execute it.  This is safe on all
1038          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039          * BIOS in ACPI backlight control mode.  We do NOT have to care
1040          * about calling the _BCL method in an enabled video device, any
1041          * will do for our purposes.
1042          */
1043
1044         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045                                      tpacpi_acpi_walk_find_bcl, NULL,
1046                                      &bcl_ptr);
1047
1048         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049                 tp_features.bright_acpimode = 1;
1050                 return (bcl_levels - 2);
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057                                         const char * const details)
1058 {
1059         tpacpi_log_usertask("deprecated sysfs attribute");
1060         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061                 "will be removed. %s\n",
1062                 what, details);
1063 }
1064
1065 /*************************************************************************
1066  * rfkill and radio control support helpers
1067  */
1068
1069 /*
1070  * ThinkPad-ACPI firmware handling model:
1071  *
1072  * WLSW (master wireless switch) is event-driven, and is common to all
1073  * firmware-controlled radios.  It cannot be controlled, just monitored,
1074  * as expected.  It overrides all radio state in firmware
1075  *
1076  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077  * (TODO: verify how WLSW interacts with the returned radio state).
1078  *
1079  * The only time there are shadow radio state changes, is when
1080  * masked-off hotkeys are used.
1081  */
1082
1083 /*
1084  * Internal driver API for radio state:
1085  *
1086  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087  * bool: true means radio blocked (off)
1088  */
1089 enum tpacpi_rfkill_state {
1090         TPACPI_RFK_RADIO_OFF = 0,
1091         TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097         TPACPI_RFK_WWAN_SW_ID,
1098         TPACPI_RFK_UWB_SW_ID,
1099         TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106         [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111         struct rfkill *rfkill;
1112         enum tpacpi_rfk_id id;
1113         const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117         /* firmware interface */
1118         int (*get_status)(void);
1119         int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127         int status;
1128
1129         if (!tp_rfk)
1130                 return -ENODEV;
1131
1132         status = (tp_rfk->ops->get_status)();
1133         if (status < 0)
1134                 return status;
1135
1136         rfkill_set_sw_state(tp_rfk->rfkill,
1137                             (status == TPACPI_RFK_RADIO_OFF));
1138
1139         return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145         unsigned int i;
1146
1147         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152  * Sync the HW-blocking state of all rfkill switches,
1153  * do notice it causes the rfkill core to schedule uevents
1154  */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157         unsigned int i;
1158         struct tpacpi_rfk *tp_rfk;
1159
1160         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161                 tp_rfk = tpacpi_rfkill_switches[i];
1162                 if (tp_rfk) {
1163                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1164                                                 blocked)) {
1165                                 /* ignore -- we track sw block */
1166                         }
1167                 }
1168         }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177         int res = hotkey_get_wlsw();
1178         int hw_blocked;
1179
1180         /* When unknown or unsupported, we have to assume it is unblocked */
1181         if (res < 0)
1182                 return false;
1183
1184         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185         tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187         return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192         struct tpacpi_rfk *tp_rfk = data;
1193         int res;
1194
1195         dbg_printk(TPACPI_DBG_RFKILL,
1196                    "request to change radio state to %s\n",
1197                    blocked ? "blocked" : "unblocked");
1198
1199         /* try to set radio state */
1200         res = (tp_rfk->ops->set_status)(blocked ?
1201                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203         /* and update the rfkill core with whatever the FW really did */
1204         tpacpi_rfk_update_swstate(tp_rfk);
1205
1206         return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210         .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214                         const struct tpacpi_rfk_ops *tp_rfkops,
1215                         const enum rfkill_type rfktype,
1216                         const char *name,
1217                         const bool set_default)
1218 {
1219         struct tpacpi_rfk *atp_rfk;
1220         int res;
1221         bool sw_state = false;
1222         int sw_status;
1223
1224         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227         if (atp_rfk)
1228                 atp_rfk->rfkill = rfkill_alloc(name,
1229                                                 &tpacpi_pdev->dev,
1230                                                 rfktype,
1231                                                 &tpacpi_rfk_rfkill_ops,
1232                                                 atp_rfk);
1233         if (!atp_rfk || !atp_rfk->rfkill) {
1234                 printk(TPACPI_ERR
1235                         "failed to allocate memory for rfkill class\n");
1236                 kfree(atp_rfk);
1237                 return -ENOMEM;
1238         }
1239
1240         atp_rfk->id = id;
1241         atp_rfk->ops = tp_rfkops;
1242
1243         sw_status = (tp_rfkops->get_status)();
1244         if (sw_status < 0) {
1245                 printk(TPACPI_ERR
1246                         "failed to read initial state for %s, error %d\n",
1247                         name, sw_status);
1248         } else {
1249                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250                 if (set_default) {
1251                         /* try to keep the initial state, since we ask the
1252                          * firmware to preserve it across S5 in NVRAM */
1253                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254                 }
1255         }
1256         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258         res = rfkill_register(atp_rfk->rfkill);
1259         if (res < 0) {
1260                 printk(TPACPI_ERR
1261                         "failed to register %s rfkill switch: %d\n",
1262                         name, res);
1263                 rfkill_destroy(atp_rfk->rfkill);
1264                 kfree(atp_rfk);
1265                 return res;
1266         }
1267
1268         tpacpi_rfkill_switches[id] = atp_rfk;
1269         return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274         struct tpacpi_rfk *tp_rfk;
1275
1276         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278         tp_rfk = tpacpi_rfkill_switches[id];
1279         if (tp_rfk) {
1280                 rfkill_unregister(tp_rfk->rfkill);
1281                 tpacpi_rfkill_switches[id] = NULL;
1282                 kfree(tp_rfk);
1283         }
1284 }
1285
1286 static void printk_deprecated_rfkill_attribute(const char * const what)
1287 {
1288         printk_deprecated_attribute(what,
1289                         "Please switch to generic rfkill before year 2010");
1290 }
1291
1292 /* sysfs <radio> enable ------------------------------------------------ */
1293 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1294                                             struct device_attribute *attr,
1295                                             char *buf)
1296 {
1297         int status;
1298
1299         printk_deprecated_rfkill_attribute(attr->attr.name);
1300
1301         /* This is in the ABI... */
1302         if (tpacpi_rfk_check_hwblock_state()) {
1303                 status = TPACPI_RFK_RADIO_OFF;
1304         } else {
1305                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1306                 if (status < 0)
1307                         return status;
1308         }
1309
1310         return snprintf(buf, PAGE_SIZE, "%d\n",
1311                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1312 }
1313
1314 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1315                             struct device_attribute *attr,
1316                             const char *buf, size_t count)
1317 {
1318         unsigned long t;
1319         int res;
1320
1321         printk_deprecated_rfkill_attribute(attr->attr.name);
1322
1323         if (parse_strtoul(buf, 1, &t))
1324                 return -EINVAL;
1325
1326         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1327
1328         /* This is in the ABI... */
1329         if (tpacpi_rfk_check_hwblock_state() && !!t)
1330                 return -EPERM;
1331
1332         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1333                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1334         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1335
1336         return (res < 0) ? res : count;
1337 }
1338
1339 /* procfs -------------------------------------------------------------- */
1340 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1341 {
1342         int len = 0;
1343
1344         if (id >= TPACPI_RFK_SW_MAX)
1345                 len += sprintf(p + len, "status:\t\tnot supported\n");
1346         else {
1347                 int status;
1348
1349                 /* This is in the ABI... */
1350                 if (tpacpi_rfk_check_hwblock_state()) {
1351                         status = TPACPI_RFK_RADIO_OFF;
1352                 } else {
1353                         status = tpacpi_rfk_update_swstate(
1354                                                 tpacpi_rfkill_switches[id]);
1355                         if (status < 0)
1356                                 return status;
1357                 }
1358
1359                 len += sprintf(p + len, "status:\t\t%s\n",
1360                                 (status == TPACPI_RFK_RADIO_ON) ?
1361                                         "enabled" : "disabled");
1362                 len += sprintf(p + len, "commands:\tenable, disable\n");
1363         }
1364
1365         return len;
1366 }
1367
1368 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1369 {
1370         char *cmd;
1371         int status = -1;
1372         int res = 0;
1373
1374         if (id >= TPACPI_RFK_SW_MAX)
1375                 return -ENODEV;
1376
1377         while ((cmd = next_cmd(&buf))) {
1378                 if (strlencmp(cmd, "enable") == 0)
1379                         status = TPACPI_RFK_RADIO_ON;
1380                 else if (strlencmp(cmd, "disable") == 0)
1381                         status = TPACPI_RFK_RADIO_OFF;
1382                 else
1383                         return -EINVAL;
1384         }
1385
1386         if (status != -1) {
1387                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1388                                 (status == TPACPI_RFK_RADIO_ON) ?
1389                                                 "enable" : "disable",
1390                                 tpacpi_rfkill_names[id]);
1391                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1392                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1393         }
1394
1395         return res;
1396 }
1397
1398 /*************************************************************************
1399  * thinkpad-acpi driver attributes
1400  */
1401
1402 /* interface_version --------------------------------------------------- */
1403 static ssize_t tpacpi_driver_interface_version_show(
1404                                 struct device_driver *drv,
1405                                 char *buf)
1406 {
1407         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1408 }
1409
1410 static DRIVER_ATTR(interface_version, S_IRUGO,
1411                 tpacpi_driver_interface_version_show, NULL);
1412
1413 /* debug_level --------------------------------------------------------- */
1414 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1415                                                 char *buf)
1416 {
1417         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1418 }
1419
1420 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1421                                                 const char *buf, size_t count)
1422 {
1423         unsigned long t;
1424
1425         if (parse_strtoul(buf, 0xffff, &t))
1426                 return -EINVAL;
1427
1428         dbg_level = t;
1429
1430         return count;
1431 }
1432
1433 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1434                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1435
1436 /* version ------------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1438                                                 char *buf)
1439 {
1440         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1441                         TPACPI_DESC, TPACPI_VERSION);
1442 }
1443
1444 static DRIVER_ATTR(version, S_IRUGO,
1445                 tpacpi_driver_version_show, NULL);
1446
1447 /* --------------------------------------------------------------------- */
1448
1449 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1450
1451 /* wlsw_emulstate ------------------------------------------------------ */
1452 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1453                                                 char *buf)
1454 {
1455         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1456 }
1457
1458 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1459                                                 const char *buf, size_t count)
1460 {
1461         unsigned long t;
1462
1463         if (parse_strtoul(buf, 1, &t))
1464                 return -EINVAL;
1465
1466         if (tpacpi_wlsw_emulstate != !!t) {
1467                 tpacpi_wlsw_emulstate = !!t;
1468                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1469         }
1470
1471         return count;
1472 }
1473
1474 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1475                 tpacpi_driver_wlsw_emulstate_show,
1476                 tpacpi_driver_wlsw_emulstate_store);
1477
1478 /* bluetooth_emulstate ------------------------------------------------- */
1479 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1480                                         struct device_driver *drv,
1481                                         char *buf)
1482 {
1483         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1487                                         struct device_driver *drv,
1488                                         const char *buf, size_t count)
1489 {
1490         unsigned long t;
1491
1492         if (parse_strtoul(buf, 1, &t))
1493                 return -EINVAL;
1494
1495         tpacpi_bluetooth_emulstate = !!t;
1496
1497         return count;
1498 }
1499
1500 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1501                 tpacpi_driver_bluetooth_emulstate_show,
1502                 tpacpi_driver_bluetooth_emulstate_store);
1503
1504 /* wwan_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_wwan_emulstate_show(
1506                                         struct device_driver *drv,
1507                                         char *buf)
1508 {
1509         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_wwan_emulstate_store(
1513                                         struct device_driver *drv,
1514                                         const char *buf, size_t count)
1515 {
1516         unsigned long t;
1517
1518         if (parse_strtoul(buf, 1, &t))
1519                 return -EINVAL;
1520
1521         tpacpi_wwan_emulstate = !!t;
1522
1523         return count;
1524 }
1525
1526 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1527                 tpacpi_driver_wwan_emulstate_show,
1528                 tpacpi_driver_wwan_emulstate_store);
1529
1530 /* uwb_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_uwb_emulstate_show(
1532                                         struct device_driver *drv,
1533                                         char *buf)
1534 {
1535         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_uwb_emulstate_store(
1539                                         struct device_driver *drv,
1540                                         const char *buf, size_t count)
1541 {
1542         unsigned long t;
1543
1544         if (parse_strtoul(buf, 1, &t))
1545                 return -EINVAL;
1546
1547         tpacpi_uwb_emulstate = !!t;
1548
1549         return count;
1550 }
1551
1552 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1553                 tpacpi_driver_uwb_emulstate_show,
1554                 tpacpi_driver_uwb_emulstate_store);
1555 #endif
1556
1557 /* --------------------------------------------------------------------- */
1558
1559 static struct driver_attribute *tpacpi_driver_attributes[] = {
1560         &driver_attr_debug_level, &driver_attr_version,
1561         &driver_attr_interface_version,
1562 };
1563
1564 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1565 {
1566         int i, res;
1567
1568         i = 0;
1569         res = 0;
1570         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1571                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1572                 i++;
1573         }
1574
1575 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1576         if (!res && dbg_wlswemul)
1577                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1578         if (!res && dbg_bluetoothemul)
1579                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1580         if (!res && dbg_wwanemul)
1581                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1582         if (!res && dbg_uwbemul)
1583                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1584 #endif
1585
1586         return res;
1587 }
1588
1589 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1590 {
1591         int i;
1592
1593         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1594                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1595
1596 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1597         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1598         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1599         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1600         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1601 #endif
1602 }
1603
1604 /*************************************************************************
1605  * Firmware Data
1606  */
1607
1608 /*
1609  * Table of recommended minimum BIOS versions
1610  *
1611  * Reasons for listing:
1612  *    1. Stable BIOS, listed because the unknown ammount of
1613  *       bugs and bad ACPI behaviour on older versions
1614  *
1615  *    2. BIOS or EC fw with known bugs that trigger on Linux
1616  *
1617  *    3. BIOS with known reduced functionality in older versions
1618  *
1619  *  We recommend the latest BIOS and EC version.
1620  *  We only support the latest BIOS and EC fw version as a rule.
1621  *
1622  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1623  *  Information from users in ThinkWiki
1624  *
1625  *  WARNING: we use this table also to detect that the machine is
1626  *  a ThinkPad in some cases, so don't remove entries lightly.
1627  */
1628
1629 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1630         { .vendor       = (__v),                        \
1631           .bios         = TPID(__id1, __id2),           \
1632           .ec           = TPACPI_MATCH_ANY,             \
1633           .quirks       = TPACPI_MATCH_ANY << 16        \
1634                           | (__bv1) << 8 | (__bv2) }
1635
1636 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1637                 __eid1, __eid2, __ev1, __ev2)           \
1638         { .vendor       = (__v),                        \
1639           .bios         = TPID(__bid1, __bid2),         \
1640           .ec           = TPID(__eid1, __eid2),         \
1641           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1642                           | (__bv1) << 8 | (__bv2) }
1643
1644 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1645         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1646
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1649                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1650
1651 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1652                 __eid1, __eid2, __ev1, __ev2)           \
1653         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1654                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1655
1656 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1657         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1658
1659 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1660         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1661                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1662
1663 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1664                 __eid1, __eid2, __ev1, __ev2)           \
1665         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1666                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1667
1668 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1669         /*  Numeric models ------------------ */
1670         /*      FW MODEL   BIOS VERS          */
1671         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1672         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1673         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1674         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1675         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1676         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1677         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1678         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1679         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1680
1681         /* A-series ------------------------- */
1682         /*      FW MODEL   BIOS VERS  EC VERS */
1683         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1684         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1685         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1686         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1687         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1688         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1689         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1690         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1691         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1692         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1693         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1694
1695         /* G-series ------------------------- */
1696         /*      FW MODEL   BIOS VERS          */
1697         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1698         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1699
1700         /* R-series, T-series --------------- */
1701         /*      FW MODEL   BIOS VERS  EC VERS */
1702         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1703         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1704         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1705         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1706         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1707         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1708         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1709                                                     T40/p, T41/p, T42/p (1) */
1710         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1711         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1712         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1713         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1714
1715         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1716         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1717         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1718         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1719         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1720         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1721
1722         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1723         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1724         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1725
1726         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1727         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1728         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1729
1730         /* X-series ------------------------- */
1731         /*      FW MODEL   BIOS VERS  EC VERS */
1732         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1733         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1734         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1735         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1736         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1737         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1738         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1739
1740         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1741         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1742
1743         /* (0) - older versions lack DMI EC fw string and functionality */
1744         /* (1) - older versions known to lack functionality */
1745 };
1746
1747 #undef TPV_QL1
1748 #undef TPV_QL0
1749 #undef TPV_QI2
1750 #undef TPV_QI1
1751 #undef TPV_QI0
1752 #undef TPV_Q_X
1753 #undef TPV_Q
1754
1755 static void __init tpacpi_check_outdated_fw(void)
1756 {
1757         unsigned long fwvers;
1758         u16 ec_version, bios_version;
1759
1760         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1761                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1762
1763         if (!fwvers)
1764                 return;
1765
1766         bios_version = fwvers & 0xffffU;
1767         ec_version = (fwvers >> 16) & 0xffffU;
1768
1769         /* note that unknown versions are set to 0x0000 and we use that */
1770         if ((bios_version > thinkpad_id.bios_release) ||
1771             (ec_version > thinkpad_id.ec_release &&
1772                                 ec_version != TPACPI_MATCH_ANY)) {
1773                 /*
1774                  * The changelogs would let us track down the exact
1775                  * reason, but it is just too much of a pain to track
1776                  * it.  We only list BIOSes that are either really
1777                  * broken, or really stable to begin with, so it is
1778                  * best if the user upgrades the firmware anyway.
1779                  */
1780                 printk(TPACPI_WARN
1781                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1782                 printk(TPACPI_WARN
1783                         "WARNING: This firmware may be missing critical bug "
1784                         "fixes and/or important features\n");
1785         }
1786 }
1787
1788 static bool __init tpacpi_is_fw_known(void)
1789 {
1790         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1791                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1792 }
1793
1794 /****************************************************************************
1795  ****************************************************************************
1796  *
1797  * Subdrivers
1798  *
1799  ****************************************************************************
1800  ****************************************************************************/
1801
1802 /*************************************************************************
1803  * thinkpad-acpi init subdriver
1804  */
1805
1806 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1807 {
1808         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1809         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1810
1811         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1812                 (thinkpad_id.bios_version_str) ?
1813                         thinkpad_id.bios_version_str : "unknown",
1814                 (thinkpad_id.ec_version_str) ?
1815                         thinkpad_id.ec_version_str : "unknown");
1816
1817         if (thinkpad_id.vendor && thinkpad_id.model_str)
1818                 printk(TPACPI_INFO "%s %s, model %s\n",
1819                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1820                                 "IBM" : ((thinkpad_id.vendor ==
1821                                                 PCI_VENDOR_ID_LENOVO) ?
1822                                         "Lenovo" : "Unknown vendor"),
1823                         thinkpad_id.model_str,
1824                         (thinkpad_id.nummodel_str) ?
1825                                 thinkpad_id.nummodel_str : "unknown");
1826
1827         tpacpi_check_outdated_fw();
1828         return 0;
1829 }
1830
1831 static int thinkpad_acpi_driver_read(char *p)
1832 {
1833         int len = 0;
1834
1835         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1836         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1837
1838         return len;
1839 }
1840
1841 static struct ibm_struct thinkpad_acpi_driver_data = {
1842         .name = "driver",
1843         .read = thinkpad_acpi_driver_read,
1844 };
1845
1846 /*************************************************************************
1847  * Hotkey subdriver
1848  */
1849
1850 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1851         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1852         TP_ACPI_HOTKEYSCAN_FNF2,
1853         TP_ACPI_HOTKEYSCAN_FNF3,
1854         TP_ACPI_HOTKEYSCAN_FNF4,
1855         TP_ACPI_HOTKEYSCAN_FNF5,
1856         TP_ACPI_HOTKEYSCAN_FNF6,
1857         TP_ACPI_HOTKEYSCAN_FNF7,
1858         TP_ACPI_HOTKEYSCAN_FNF8,
1859         TP_ACPI_HOTKEYSCAN_FNF9,
1860         TP_ACPI_HOTKEYSCAN_FNF10,
1861         TP_ACPI_HOTKEYSCAN_FNF11,
1862         TP_ACPI_HOTKEYSCAN_FNF12,
1863         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1864         TP_ACPI_HOTKEYSCAN_FNINSERT,
1865         TP_ACPI_HOTKEYSCAN_FNDELETE,
1866         TP_ACPI_HOTKEYSCAN_FNHOME,
1867         TP_ACPI_HOTKEYSCAN_FNEND,
1868         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1869         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1870         TP_ACPI_HOTKEYSCAN_FNSPACE,
1871         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1872         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1873         TP_ACPI_HOTKEYSCAN_MUTE,
1874         TP_ACPI_HOTKEYSCAN_THINKPAD,
1875 };
1876
1877 enum {  /* Keys available through NVRAM polling */
1878         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1879         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1880 };
1881
1882 enum {  /* Positions of some of the keys in hotkey masks */
1883         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1884         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1885         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1886         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1887         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1888         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1889         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1890         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1891         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1892         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1893         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1894 };
1895
1896 enum {  /* NVRAM to ACPI HKEY group map */
1897         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1898                                           TP_ACPI_HKEY_ZOOM_MASK |
1899                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1900                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1901         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1902                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1903         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1904                                           TP_ACPI_HKEY_VOLDWN_MASK |
1905                                           TP_ACPI_HKEY_MUTE_MASK,
1906 };
1907
1908 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1909 struct tp_nvram_state {
1910        u16 thinkpad_toggle:1;
1911        u16 zoom_toggle:1;
1912        u16 display_toggle:1;
1913        u16 thinklight_toggle:1;
1914        u16 hibernate_toggle:1;
1915        u16 displayexp_toggle:1;
1916        u16 display_state:1;
1917        u16 brightness_toggle:1;
1918        u16 volume_toggle:1;
1919        u16 mute:1;
1920
1921        u8 brightness_level;
1922        u8 volume_level;
1923 };
1924
1925 /* kthread for the hotkey poller */
1926 static struct task_struct *tpacpi_hotkey_task;
1927
1928 /* Acquired while the poller kthread is running, use to sync start/stop */
1929 static struct mutex hotkey_thread_mutex;
1930
1931 /*
1932  * Acquire mutex to write poller control variables.
1933  * Increment hotkey_config_change when changing them.
1934  *
1935  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1936  */
1937 static struct mutex hotkey_thread_data_mutex;
1938 static unsigned int hotkey_config_change;
1939
1940 /*
1941  * hotkey poller control variables
1942  *
1943  * Must be atomic or readers will also need to acquire mutex
1944  */
1945 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1946 static unsigned int hotkey_poll_freq = 10; /* Hz */
1947
1948 #define HOTKEY_CONFIG_CRITICAL_START \
1949         do { \
1950                 mutex_lock(&hotkey_thread_data_mutex); \
1951                 hotkey_config_change++; \
1952         } while (0);
1953 #define HOTKEY_CONFIG_CRITICAL_END \
1954         mutex_unlock(&hotkey_thread_data_mutex);
1955
1956 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1957
1958 #define hotkey_source_mask 0U
1959 #define HOTKEY_CONFIG_CRITICAL_START
1960 #define HOTKEY_CONFIG_CRITICAL_END
1961
1962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1963
1964 static struct mutex hotkey_mutex;
1965
1966 static enum {   /* Reasons for waking up */
1967         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1968         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1969         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1970 } hotkey_wakeup_reason;
1971
1972 static int hotkey_autosleep_ack;
1973
1974 static u32 hotkey_orig_mask;
1975 static u32 hotkey_all_mask;
1976 static u32 hotkey_reserved_mask;
1977 static u32 hotkey_mask;
1978
1979 static unsigned int hotkey_report_mode;
1980
1981 static u16 *hotkey_keycode_map;
1982
1983 static struct attribute_set *hotkey_dev_attributes;
1984
1985 /* HKEY.MHKG() return bits */
1986 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1987
1988 static int hotkey_get_wlsw(void)
1989 {
1990         int status;
1991
1992         if (!tp_features.hotkey_wlsw)
1993                 return -ENODEV;
1994
1995 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1996         if (dbg_wlswemul)
1997                 return (tpacpi_wlsw_emulstate) ?
1998                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1999 #endif
2000
2001         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2002                 return -EIO;
2003
2004         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2005 }
2006
2007 static int hotkey_get_tablet_mode(int *status)
2008 {
2009         int s;
2010
2011         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2012                 return -EIO;
2013
2014         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2015         return 0;
2016 }
2017
2018 /*
2019  * Call with hotkey_mutex held
2020  */
2021 static int hotkey_mask_get(void)
2022 {
2023         u32 m = 0;
2024
2025         if (tp_features.hotkey_mask) {
2026                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2027                         return -EIO;
2028         }
2029         HOTKEY_CONFIG_CRITICAL_START
2030         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2031         HOTKEY_CONFIG_CRITICAL_END
2032
2033         return 0;
2034 }
2035
2036 /*
2037  * Call with hotkey_mutex held
2038  */
2039 static int hotkey_mask_set(u32 mask)
2040 {
2041         int i;
2042         int rc = 0;
2043
2044         if (tp_features.hotkey_mask) {
2045                 if (!tp_warned.hotkey_mask_ff &&
2046                     (mask == 0xffff || mask == 0xffffff ||
2047                      mask == 0xffffffff)) {
2048                         tp_warned.hotkey_mask_ff = 1;
2049                         printk(TPACPI_NOTICE
2050                                "setting the hotkey mask to 0x%08x is likely "
2051                                "not the best way to go about it\n", mask);
2052                         printk(TPACPI_NOTICE
2053                                "please consider using the driver defaults, "
2054                                "and refer to up-to-date thinkpad-acpi "
2055                                "documentation\n");
2056                 }
2057
2058                 HOTKEY_CONFIG_CRITICAL_START
2059                 for (i = 0; i < 32; i++) {
2060                         u32 m = 1 << i;
2061                         /* enable in firmware mask only keys not in NVRAM
2062                          * mode, but enable the key in the cached hotkey_mask
2063                          * regardless of mode, or the key will end up
2064                          * disabled by hotkey_mask_get() */
2065                         if (!acpi_evalf(hkey_handle,
2066                                         NULL, "MHKM", "vdd", i + 1,
2067                                         !!((mask & ~hotkey_source_mask) & m))) {
2068                                 rc = -EIO;
2069                                 break;
2070                         } else {
2071                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2072                         }
2073                 }
2074                 HOTKEY_CONFIG_CRITICAL_END
2075
2076                 /* hotkey_mask_get must be called unconditionally below */
2077                 if (!hotkey_mask_get() && !rc &&
2078                     (hotkey_mask & ~hotkey_source_mask) !=
2079                      (mask & ~hotkey_source_mask)) {
2080                         printk(TPACPI_NOTICE
2081                                "requested hot key mask 0x%08x, but "
2082                                "firmware forced it to 0x%08x\n",
2083                                mask, hotkey_mask);
2084                 }
2085         } else {
2086 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2087                 HOTKEY_CONFIG_CRITICAL_START
2088                 hotkey_mask = mask & hotkey_source_mask;
2089                 HOTKEY_CONFIG_CRITICAL_END
2090                 hotkey_mask_get();
2091                 if (hotkey_mask != mask) {
2092                         printk(TPACPI_NOTICE
2093                                "requested hot key mask 0x%08x, "
2094                                "forced to 0x%08x (NVRAM poll mask is "
2095                                "0x%08x): no firmware mask support\n",
2096                                mask, hotkey_mask, hotkey_source_mask);
2097                 }
2098 #else
2099                 hotkey_mask_get();
2100                 rc = -ENXIO;
2101 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2102         }
2103
2104         return rc;
2105 }
2106
2107 static int hotkey_status_get(int *status)
2108 {
2109         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2110                 return -EIO;
2111
2112         return 0;
2113 }
2114
2115 static int hotkey_status_set(bool enable)
2116 {
2117         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2118                 return -EIO;
2119
2120         return 0;
2121 }
2122
2123 static void tpacpi_input_send_tabletsw(void)
2124 {
2125         int state;
2126
2127         if (tp_features.hotkey_tablet &&
2128             !hotkey_get_tablet_mode(&state)) {
2129                 mutex_lock(&tpacpi_inputdev_send_mutex);
2130
2131                 input_report_switch(tpacpi_inputdev,
2132                                     SW_TABLET_MODE, !!state);
2133                 input_sync(tpacpi_inputdev);
2134
2135                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2136         }
2137 }
2138
2139 static void tpacpi_input_send_key(unsigned int scancode)
2140 {
2141         unsigned int keycode;
2142
2143         keycode = hotkey_keycode_map[scancode];
2144
2145         if (keycode != KEY_RESERVED) {
2146                 mutex_lock(&tpacpi_inputdev_send_mutex);
2147
2148                 input_report_key(tpacpi_inputdev, keycode, 1);
2149                 if (keycode == KEY_UNKNOWN)
2150                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2151                                     scancode);
2152                 input_sync(tpacpi_inputdev);
2153
2154                 input_report_key(tpacpi_inputdev, keycode, 0);
2155                 if (keycode == KEY_UNKNOWN)
2156                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2157                                     scancode);
2158                 input_sync(tpacpi_inputdev);
2159
2160                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2161         }
2162 }
2163
2164 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2165 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2166
2167 static void tpacpi_hotkey_send_key(unsigned int scancode)
2168 {
2169         tpacpi_input_send_key(scancode);
2170         if (hotkey_report_mode < 2) {
2171                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2172                                                 0x80, 0x1001 + scancode);
2173         }
2174 }
2175
2176 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2177 {
2178         u8 d;
2179
2180         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2181                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2182                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2183                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2184                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2185                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2186         }
2187         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2188                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2189                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2190         }
2191         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2192                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2193                 n->displayexp_toggle =
2194                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2195         }
2196         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2197                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2198                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2199                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2200                 n->brightness_toggle =
2201                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2202         }
2203         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2204                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2205                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2206                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2207                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2208                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2209         }
2210 }
2211
2212 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2213         do { \
2214                 if ((mask & (1 << __scancode)) && \
2215                     oldn->__member != newn->__member) \
2216                 tpacpi_hotkey_send_key(__scancode); \
2217         } while (0)
2218
2219 #define TPACPI_MAY_SEND_KEY(__scancode) \
2220         do { if (mask & (1 << __scancode)) \
2221                 tpacpi_hotkey_send_key(__scancode); } while (0)
2222
2223 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2224                                            struct tp_nvram_state *newn,
2225                                            u32 mask)
2226 {
2227         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2228         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2229         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2230         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2231
2232         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2233
2234         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2235
2236         /* handle volume */
2237         if (oldn->volume_toggle != newn->volume_toggle) {
2238                 if (oldn->mute != newn->mute) {
2239                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2240                 }
2241                 if (oldn->volume_level > newn->volume_level) {
2242                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2243                 } else if (oldn->volume_level < newn->volume_level) {
2244                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2245                 } else if (oldn->mute == newn->mute) {
2246                         /* repeated key presses that didn't change state */
2247                         if (newn->mute) {
2248                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2249                         } else if (newn->volume_level != 0) {
2250                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2251                         } else {
2252                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2253                         }
2254                 }
2255         }
2256
2257         /* handle brightness */
2258         if (oldn->brightness_toggle != newn->brightness_toggle) {
2259                 if (oldn->brightness_level < newn->brightness_level) {
2260                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2261                 } else if (oldn->brightness_level > newn->brightness_level) {
2262                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2263                 } else {
2264                         /* repeated key presses that didn't change state */
2265                         if (newn->brightness_level != 0) {
2266                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2267                         } else {
2268                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2269                         }
2270                 }
2271         }
2272 }
2273
2274 #undef TPACPI_COMPARE_KEY
2275 #undef TPACPI_MAY_SEND_KEY
2276
2277 static int hotkey_kthread(void *data)
2278 {
2279         struct tp_nvram_state s[2];
2280         u32 mask;
2281         unsigned int si, so;
2282         unsigned long t;
2283         unsigned int change_detector, must_reset;
2284         unsigned int poll_freq;
2285
2286         mutex_lock(&hotkey_thread_mutex);
2287
2288         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2289                 goto exit;
2290
2291         set_freezable();
2292
2293         so = 0;
2294         si = 1;
2295         t = 0;
2296
2297         /* Initial state for compares */
2298         mutex_lock(&hotkey_thread_data_mutex);
2299         change_detector = hotkey_config_change;
2300         mask = hotkey_source_mask & hotkey_mask;
2301         poll_freq = hotkey_poll_freq;
2302         mutex_unlock(&hotkey_thread_data_mutex);
2303         hotkey_read_nvram(&s[so], mask);
2304
2305         while (!kthread_should_stop()) {
2306                 if (t == 0) {
2307                         if (likely(poll_freq))
2308                                 t = 1000/poll_freq;
2309                         else
2310                                 t = 100;        /* should never happen... */
2311                 }
2312                 t = msleep_interruptible(t);
2313                 if (unlikely(kthread_should_stop()))
2314                         break;
2315                 must_reset = try_to_freeze();
2316                 if (t > 0 && !must_reset)
2317                         continue;
2318
2319                 mutex_lock(&hotkey_thread_data_mutex);
2320                 if (must_reset || hotkey_config_change != change_detector) {
2321                         /* forget old state on thaw or config change */
2322                         si = so;
2323                         t = 0;
2324                         change_detector = hotkey_config_change;
2325                 }
2326                 mask = hotkey_source_mask & hotkey_mask;
2327                 poll_freq = hotkey_poll_freq;
2328                 mutex_unlock(&hotkey_thread_data_mutex);
2329
2330                 if (likely(mask)) {
2331                         hotkey_read_nvram(&s[si], mask);
2332                         if (likely(si != so)) {
2333                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2334                                                                 mask);
2335                         }
2336                 }
2337
2338                 so = si;
2339                 si ^= 1;
2340         }
2341
2342 exit:
2343         mutex_unlock(&hotkey_thread_mutex);
2344         return 0;
2345 }
2346
2347 /* call with hotkey_mutex held */
2348 static void hotkey_poll_stop_sync(void)
2349 {
2350         if (tpacpi_hotkey_task) {
2351                 if (frozen(tpacpi_hotkey_task) ||
2352                     freezing(tpacpi_hotkey_task))
2353                         thaw_process(tpacpi_hotkey_task);
2354
2355                 kthread_stop(tpacpi_hotkey_task);
2356                 tpacpi_hotkey_task = NULL;
2357                 mutex_lock(&hotkey_thread_mutex);
2358                 /* at this point, the thread did exit */
2359                 mutex_unlock(&hotkey_thread_mutex);
2360         }
2361 }
2362
2363 /* call with hotkey_mutex held */
2364 static void hotkey_poll_setup(bool may_warn)
2365 {
2366         u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2367
2368         if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2369             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2370                 if (!tpacpi_hotkey_task) {
2371                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2372                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2373                         if (IS_ERR(tpacpi_hotkey_task)) {
2374                                 tpacpi_hotkey_task = NULL;
2375                                 printk(TPACPI_ERR
2376                                        "could not create kernel thread "
2377                                        "for hotkey polling\n");
2378                         }
2379                 }
2380         } else {
2381                 hotkey_poll_stop_sync();
2382                 if (may_warn && hotkeys_to_poll != 0 &&
2383                     hotkey_poll_freq == 0) {
2384                         printk(TPACPI_NOTICE
2385                                 "hot keys 0x%08x require polling, "
2386                                 "which is currently disabled\n",
2387                                 hotkeys_to_poll);
2388                 }
2389         }
2390 }
2391
2392 static void hotkey_poll_setup_safe(bool may_warn)
2393 {
2394         mutex_lock(&hotkey_mutex);
2395         hotkey_poll_setup(may_warn);
2396         mutex_unlock(&hotkey_mutex);
2397 }
2398
2399 /* call with hotkey_mutex held */
2400 static void hotkey_poll_set_freq(unsigned int freq)
2401 {
2402         if (!freq)
2403                 hotkey_poll_stop_sync();
2404
2405         HOTKEY_CONFIG_CRITICAL_START
2406         hotkey_poll_freq = freq;
2407         HOTKEY_CONFIG_CRITICAL_END
2408 }
2409
2410 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2411
2412 static void hotkey_poll_setup_safe(bool __unused)
2413 {
2414 }
2415
2416 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2417
2418 static int hotkey_inputdev_open(struct input_dev *dev)
2419 {
2420         switch (tpacpi_lifecycle) {
2421         case TPACPI_LIFE_INIT:
2422                 /*
2423                  * hotkey_init will call hotkey_poll_setup_safe
2424                  * at the appropriate moment
2425                  */
2426                 return 0;
2427         case TPACPI_LIFE_EXITING:
2428                 return -EBUSY;
2429         case TPACPI_LIFE_RUNNING:
2430                 hotkey_poll_setup_safe(false);
2431                 return 0;
2432         }
2433
2434         /* Should only happen if tpacpi_lifecycle is corrupt */
2435         BUG();
2436         return -EBUSY;
2437 }
2438
2439 static void hotkey_inputdev_close(struct input_dev *dev)
2440 {
2441         /* disable hotkey polling when possible */
2442         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2443                 hotkey_poll_setup_safe(false);
2444 }
2445
2446 /* sysfs hotkey enable ------------------------------------------------- */
2447 static ssize_t hotkey_enable_show(struct device *dev,
2448                            struct device_attribute *attr,
2449                            char *buf)
2450 {
2451         int res, status;
2452
2453         printk_deprecated_attribute("hotkey_enable",
2454                         "Hotkey reporting is always enabled");
2455
2456         res = hotkey_status_get(&status);
2457         if (res)
2458                 return res;
2459
2460         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2461 }
2462
2463 static ssize_t hotkey_enable_store(struct device *dev,
2464                             struct device_attribute *attr,
2465                             const char *buf, size_t count)
2466 {
2467         unsigned long t;
2468
2469         printk_deprecated_attribute("hotkey_enable",
2470                         "Hotkeys can be disabled through hotkey_mask");
2471
2472         if (parse_strtoul(buf, 1, &t))
2473                 return -EINVAL;
2474
2475         if (t == 0)
2476                 return -EPERM;
2477
2478         return count;
2479 }
2480
2481 static struct device_attribute dev_attr_hotkey_enable =
2482         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2483                 hotkey_enable_show, hotkey_enable_store);
2484
2485 /* sysfs hotkey mask --------------------------------------------------- */
2486 static ssize_t hotkey_mask_show(struct device *dev,
2487                            struct device_attribute *attr,
2488                            char *buf)
2489 {
2490         int res;
2491
2492         if (mutex_lock_killable(&hotkey_mutex))
2493                 return -ERESTARTSYS;
2494         res = hotkey_mask_get();
2495         mutex_unlock(&hotkey_mutex);
2496
2497         return (res)?
2498                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2499 }
2500
2501 static ssize_t hotkey_mask_store(struct device *dev,
2502                             struct device_attribute *attr,
2503                             const char *buf, size_t count)
2504 {
2505         unsigned long t;
2506         int res;
2507
2508         if (parse_strtoul(buf, 0xffffffffUL, &t))
2509                 return -EINVAL;
2510
2511         if (mutex_lock_killable(&hotkey_mutex))
2512                 return -ERESTARTSYS;
2513
2514         res = hotkey_mask_set(t);
2515
2516 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2517         hotkey_poll_setup(true);
2518 #endif
2519
2520         mutex_unlock(&hotkey_mutex);
2521
2522         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2523
2524         return (res) ? res : count;
2525 }
2526
2527 static struct device_attribute dev_attr_hotkey_mask =
2528         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2529                 hotkey_mask_show, hotkey_mask_store);
2530
2531 /* sysfs hotkey bios_enabled ------------------------------------------- */
2532 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2533                            struct device_attribute *attr,
2534                            char *buf)
2535 {
2536         return sprintf(buf, "0\n");
2537 }
2538
2539 static struct device_attribute dev_attr_hotkey_bios_enabled =
2540         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2541
2542 /* sysfs hotkey bios_mask ---------------------------------------------- */
2543 static ssize_t hotkey_bios_mask_show(struct device *dev,
2544                            struct device_attribute *attr,
2545                            char *buf)
2546 {
2547         printk_deprecated_attribute("hotkey_bios_mask",
2548                         "This attribute is useless.");
2549         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2550 }
2551
2552 static struct device_attribute dev_attr_hotkey_bios_mask =
2553         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2554
2555 /* sysfs hotkey all_mask ----------------------------------------------- */
2556 static ssize_t hotkey_all_mask_show(struct device *dev,
2557                            struct device_attribute *attr,
2558                            char *buf)
2559 {
2560         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2561                                 hotkey_all_mask | hotkey_source_mask);
2562 }
2563
2564 static struct device_attribute dev_attr_hotkey_all_mask =
2565         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2566
2567 /* sysfs hotkey recommended_mask --------------------------------------- */
2568 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2569                                             struct device_attribute *attr,
2570                                             char *buf)
2571 {
2572         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2573                         (hotkey_all_mask | hotkey_source_mask)
2574                         & ~hotkey_reserved_mask);
2575 }
2576
2577 static struct device_attribute dev_attr_hotkey_recommended_mask =
2578         __ATTR(hotkey_recommended_mask, S_IRUGO,
2579                 hotkey_recommended_mask_show, NULL);
2580
2581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2582
2583 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2584 static ssize_t hotkey_source_mask_show(struct device *dev,
2585                            struct device_attribute *attr,
2586                            char *buf)
2587 {
2588         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2589 }
2590
2591 static ssize_t hotkey_source_mask_store(struct device *dev,
2592                             struct device_attribute *attr,
2593                             const char *buf, size_t count)
2594 {
2595         unsigned long t;
2596
2597         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2598                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2599                 return -EINVAL;
2600
2601         if (mutex_lock_killable(&hotkey_mutex))
2602                 return -ERESTARTSYS;
2603
2604         HOTKEY_CONFIG_CRITICAL_START
2605         hotkey_source_mask = t;
2606         HOTKEY_CONFIG_CRITICAL_END
2607
2608         hotkey_poll_setup(true);
2609         hotkey_mask_set(hotkey_mask);
2610
2611         mutex_unlock(&hotkey_mutex);
2612
2613         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2614
2615         return count;
2616 }
2617
2618 static struct device_attribute dev_attr_hotkey_source_mask =
2619         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2620                 hotkey_source_mask_show, hotkey_source_mask_store);
2621
2622 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2623 static ssize_t hotkey_poll_freq_show(struct device *dev,
2624                            struct device_attribute *attr,
2625                            char *buf)
2626 {
2627         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2628 }
2629
2630 static ssize_t hotkey_poll_freq_store(struct device *dev,
2631                             struct device_attribute *attr,
2632                             const char *buf, size_t count)
2633 {
2634         unsigned long t;
2635
2636         if (parse_strtoul(buf, 25, &t))
2637                 return -EINVAL;
2638
2639         if (mutex_lock_killable(&hotkey_mutex))
2640                 return -ERESTARTSYS;
2641
2642         hotkey_poll_set_freq(t);
2643         hotkey_poll_setup(true);
2644
2645         mutex_unlock(&hotkey_mutex);
2646
2647         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2648
2649         return count;
2650 }
2651
2652 static struct device_attribute dev_attr_hotkey_poll_freq =
2653         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2654                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2655
2656 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2657
2658 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2659 static ssize_t hotkey_radio_sw_show(struct device *dev,
2660                            struct device_attribute *attr,
2661                            char *buf)
2662 {
2663         int res;
2664         res = hotkey_get_wlsw();
2665         if (res < 0)
2666                 return res;
2667
2668         /* Opportunistic update */
2669         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2670
2671         return snprintf(buf, PAGE_SIZE, "%d\n",
2672                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2673 }
2674
2675 static struct device_attribute dev_attr_hotkey_radio_sw =
2676         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2677
2678 static void hotkey_radio_sw_notify_change(void)
2679 {
2680         if (tp_features.hotkey_wlsw)
2681                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2682                              "hotkey_radio_sw");
2683 }
2684
2685 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2686 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2687                            struct device_attribute *attr,
2688                            char *buf)
2689 {
2690         int res, s;
2691         res = hotkey_get_tablet_mode(&s);
2692         if (res < 0)
2693                 return res;
2694
2695         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_tablet_mode =
2699         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2700
2701 static void hotkey_tablet_mode_notify_change(void)
2702 {
2703         if (tp_features.hotkey_tablet)
2704                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2705                              "hotkey_tablet_mode");
2706 }
2707
2708 /* sysfs hotkey report_mode -------------------------------------------- */
2709 static ssize_t hotkey_report_mode_show(struct device *dev,
2710                            struct device_attribute *attr,
2711                            char *buf)
2712 {
2713         return snprintf(buf, PAGE_SIZE, "%d\n",
2714                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2715 }
2716
2717 static struct device_attribute dev_attr_hotkey_report_mode =
2718         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2719
2720 /* sysfs wakeup reason (pollable) -------------------------------------- */
2721 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2722                            struct device_attribute *attr,
2723                            char *buf)
2724 {
2725         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2726 }
2727
2728 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2729         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2730
2731 static void hotkey_wakeup_reason_notify_change(void)
2732 {
2733         if (tp_features.hotkey_mask)
2734                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2735                              "wakeup_reason");
2736 }
2737
2738 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2739 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2740                            struct device_attribute *attr,
2741                            char *buf)
2742 {
2743         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2744 }
2745
2746 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2747         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2748                hotkey_wakeup_hotunplug_complete_show, NULL);
2749
2750 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2751 {
2752         if (tp_features.hotkey_mask)
2753                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2754                              "wakeup_hotunplug_complete");
2755 }
2756
2757 /* --------------------------------------------------------------------- */
2758
2759 static struct attribute *hotkey_attributes[] __initdata = {
2760         &dev_attr_hotkey_enable.attr,
2761         &dev_attr_hotkey_bios_enabled.attr,
2762         &dev_attr_hotkey_report_mode.attr,
2763 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2764         &dev_attr_hotkey_mask.attr,
2765         &dev_attr_hotkey_all_mask.attr,
2766         &dev_attr_hotkey_recommended_mask.attr,
2767         &dev_attr_hotkey_source_mask.attr,
2768         &dev_attr_hotkey_poll_freq.attr,
2769 #endif
2770 };
2771
2772 static struct attribute *hotkey_mask_attributes[] __initdata = {
2773         &dev_attr_hotkey_bios_mask.attr,
2774 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2775         &dev_attr_hotkey_mask.attr,
2776         &dev_attr_hotkey_all_mask.attr,
2777         &dev_attr_hotkey_recommended_mask.attr,
2778 #endif
2779         &dev_attr_hotkey_wakeup_reason.attr,
2780         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2781 };
2782
2783 /*
2784  * Sync both the hw and sw blocking state of all switches
2785  */
2786 static void tpacpi_send_radiosw_update(void)
2787 {
2788         int wlsw;
2789
2790         /*
2791          * We must sync all rfkill controllers *before* issuing any
2792          * rfkill input events, or we will race the rfkill core input
2793          * handler.
2794          *
2795          * tpacpi_inputdev_send_mutex works as a syncronization point
2796          * for the above.
2797          *
2798          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2799          */
2800
2801         wlsw = hotkey_get_wlsw();
2802
2803         /* Sync hw blocking state first if it is hw-blocked */
2804         if (wlsw == TPACPI_RFK_RADIO_OFF)
2805                 tpacpi_rfk_update_hwblock_state(true);
2806
2807         /* Sync sw blocking state */
2808         tpacpi_rfk_update_swstate_all();
2809
2810         /* Sync hw blocking state last if it is hw-unblocked */
2811         if (wlsw == TPACPI_RFK_RADIO_ON)
2812                 tpacpi_rfk_update_hwblock_state(false);
2813
2814         /* Issue rfkill input event for WLSW switch */
2815         if (!(wlsw < 0)) {
2816                 mutex_lock(&tpacpi_inputdev_send_mutex);
2817
2818                 input_report_switch(tpacpi_inputdev,
2819                                     SW_RFKILL_ALL, (wlsw > 0));
2820                 input_sync(tpacpi_inputdev);
2821
2822                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2823         }
2824
2825         /*
2826          * this can be unconditional, as we will poll state again
2827          * if userspace uses the notify to read data
2828          */
2829         hotkey_radio_sw_notify_change();
2830 }
2831
2832 static void hotkey_exit(void)
2833 {
2834 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2835         mutex_lock(&hotkey_mutex);
2836         hotkey_poll_stop_sync();
2837         mutex_unlock(&hotkey_mutex);
2838 #endif
2839
2840         if (hotkey_dev_attributes)
2841                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2842
2843         kfree(hotkey_keycode_map);
2844
2845         if (tp_features.hotkey) {
2846                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2847                            "restoring original hot key mask\n");
2848                 /* no short-circuit boolean operator below! */
2849                 if ((hotkey_mask_set(hotkey_orig_mask) |
2850                      hotkey_status_set(false)) != 0)
2851                         printk(TPACPI_ERR
2852                                "failed to restore hot key mask "
2853                                "to BIOS defaults\n");
2854         }
2855 }
2856
2857 static int __init hotkey_init(struct ibm_init_struct *iibm)
2858 {
2859         /* Requirements for changing the default keymaps:
2860          *
2861          * 1. Many of the keys are mapped to KEY_RESERVED for very
2862          *    good reasons.  Do not change them unless you have deep
2863          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2864          *    the various ThinkPad models.  The driver behaves
2865          *    differently for KEY_RESERVED: such keys have their
2866          *    hot key mask *unset* in mask_recommended, and also
2867          *    in the initial hot key mask programmed into the
2868          *    firmware at driver load time, which means the firm-
2869          *    ware may react very differently if you change them to
2870          *    something else;
2871          *
2872          * 2. You must be subscribed to the linux-thinkpad and
2873          *    ibm-acpi-devel mailing lists, and you should read the
2874          *    list archives since 2007 if you want to change the
2875          *    keymaps.  This requirement exists so that you will
2876          *    know the past history of problems with the thinkpad-
2877          *    acpi driver keymaps, and also that you will be
2878          *    listening to any bug reports;
2879          *
2880          * 3. Do not send thinkpad-acpi specific patches directly to
2881          *    for merging, *ever*.  Send them to the linux-acpi
2882          *    mailinglist for comments.  Merging is to be done only
2883          *    through acpi-test and the ACPI maintainer.
2884          *
2885          * If the above is too much to ask, don't change the keymap.
2886          * Ask the thinkpad-acpi maintainer to do it, instead.
2887          */
2888         static u16 ibm_keycode_map[] __initdata = {
2889                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2890                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2891                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2892                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2893
2894                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2895                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2896                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2897                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2898
2899                 /* brightness: firmware always reacts to them, unless
2900                  * X.org did some tricks in the radeon BIOS scratch
2901                  * registers of *some* models */
2902                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2903                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2904
2905                 /* Thinklight: firmware always react to it */
2906                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2907
2908                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2909                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2910
2911                 /* Volume: firmware always react to it and reprograms
2912                  * the built-in *extra* mixer.  Never map it to control
2913                  * another mixer by default. */
2914                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2915                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2916                 KEY_RESERVED,   /* 0x16: MUTE */
2917
2918                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2919
2920                 /* (assignments unknown, please report if found) */
2921                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2922                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2923         };
2924         static u16 lenovo_keycode_map[] __initdata = {
2925                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2926                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2927                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2928                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2929
2930                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2931                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2932                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2933                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2934
2935                 /* These either have to go through ACPI video, or
2936                  * act like in the IBM ThinkPads, so don't ever
2937                  * enable them by default */
2938                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2939                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2940
2941                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2942
2943                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2944                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2945
2946                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2947                  * react to it and reprograms the built-in *extra* mixer.
2948                  * Never map it to control another mixer by default.
2949                  *
2950                  * T60?, T61, R60?, R61: firmware and EC tries to send
2951                  * these over the regular keyboard, so these are no-ops,
2952                  * but there are still weird bugs re. MUTE, so do not
2953                  * change unless you get test reports from all Lenovo
2954                  * models.  May cause the BIOS to interfere with the
2955                  * HDA mixer.
2956                  */
2957                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2958                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2959                 KEY_RESERVED,   /* 0x16: MUTE */
2960
2961                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2962
2963                 /* (assignments unknown, please report if found) */
2964                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2965                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2966         };
2967
2968 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2969 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2970 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2971
2972         int res, i;
2973         int status;
2974         int hkeyv;
2975
2976         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2977                         "initializing hotkey subdriver\n");
2978
2979         BUG_ON(!tpacpi_inputdev);
2980         BUG_ON(tpacpi_inputdev->open != NULL ||
2981                tpacpi_inputdev->close != NULL);
2982
2983         TPACPI_ACPIHANDLE_INIT(hkey);
2984         mutex_init(&hotkey_mutex);
2985
2986 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2987         mutex_init(&hotkey_thread_mutex);
2988         mutex_init(&hotkey_thread_data_mutex);
2989 #endif
2990
2991         /* hotkey not supported on 570 */
2992         tp_features.hotkey = hkey_handle != NULL;
2993
2994         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2995                 "hotkeys are %s\n",
2996                 str_supported(tp_features.hotkey));
2997
2998         if (!tp_features.hotkey)
2999                 return 1;
3000
3001         tpacpi_disable_brightness_delay();
3002
3003         hotkey_dev_attributes = create_attr_set(13, NULL);
3004         if (!hotkey_dev_attributes)
3005                 return -ENOMEM;
3006         res = add_many_to_attr_set(hotkey_dev_attributes,
3007                         hotkey_attributes,
3008                         ARRAY_SIZE(hotkey_attributes));
3009         if (res)
3010                 goto err_exit;
3011
3012         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3013            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3014            for HKEY interface version 0x100 */
3015         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3016                 if ((hkeyv >> 8) != 1) {
3017                         printk(TPACPI_ERR "unknown version of the "
3018                                "HKEY interface: 0x%x\n", hkeyv);
3019                         printk(TPACPI_ERR "please report this to %s\n",
3020                                TPACPI_MAIL);
3021                 } else {
3022                         /*
3023                          * MHKV 0x100 in A31, R40, R40e,
3024                          * T4x, X31, and later
3025                          */
3026                         tp_features.hotkey_mask = 1;
3027                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3028                                 "firmware HKEY interface version: 0x%x\n",
3029                                 hkeyv);
3030                 }
3031         }
3032
3033         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3034                 "hotkey masks are %s\n",
3035                 str_supported(tp_features.hotkey_mask));
3036
3037         if (tp_features.hotkey_mask) {
3038                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3039                                 "MHKA", "qd")) {
3040                         printk(TPACPI_ERR
3041                                "missing MHKA handler, "
3042                                "please report this to %s\n",
3043                                TPACPI_MAIL);
3044                         /* FN+F12, FN+F4, FN+F3 */
3045                         hotkey_all_mask = 0x080cU;
3046                 }
3047         }
3048
3049         /* hotkey_source_mask *must* be zero for
3050          * the first hotkey_mask_get */
3051         if (tp_features.hotkey_mask) {
3052                 res = hotkey_mask_get();
3053                 if (res)
3054                         goto err_exit;
3055
3056                 hotkey_orig_mask = hotkey_mask;
3057                 res = add_many_to_attr_set(
3058                                 hotkey_dev_attributes,
3059                                 hotkey_mask_attributes,
3060                                 ARRAY_SIZE(hotkey_mask_attributes));
3061                 if (res)
3062                         goto err_exit;
3063         }
3064
3065 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3066         if (dbg_wlswemul) {
3067                 tp_features.hotkey_wlsw = 1;
3068                 printk(TPACPI_INFO
3069                         "radio switch emulation enabled\n");
3070         } else
3071 #endif
3072         /* Not all thinkpads have a hardware radio switch */
3073         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3074                 tp_features.hotkey_wlsw = 1;
3075                 printk(TPACPI_INFO
3076                         "radio switch found; radios are %s\n",
3077                         enabled(status, 0));
3078         }
3079         if (tp_features.hotkey_wlsw)
3080                 res = add_to_attr_set(hotkey_dev_attributes,
3081                                 &dev_attr_hotkey_radio_sw.attr);
3082
3083         /* For X41t, X60t, X61t Tablets... */
3084         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3085                 tp_features.hotkey_tablet = 1;
3086                 printk(TPACPI_INFO
3087                         "possible tablet mode switch found; "
3088                         "ThinkPad in %s mode\n",
3089                         (status & TP_HOTKEY_TABLET_MASK)?
3090                                 "tablet" : "laptop");
3091                 res = add_to_attr_set(hotkey_dev_attributes,
3092                                 &dev_attr_hotkey_tablet_mode.attr);
3093         }
3094
3095         if (!res)
3096                 res = register_attr_set_with_sysfs(
3097                                 hotkey_dev_attributes,
3098                                 &tpacpi_pdev->dev.kobj);
3099         if (res)
3100                 goto err_exit;
3101
3102         /* Set up key map */
3103
3104         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3105                                         GFP_KERNEL);
3106         if (!hotkey_keycode_map) {
3107                 printk(TPACPI_ERR
3108                         "failed to allocate memory for key map\n");
3109                 res = -ENOMEM;
3110                 goto err_exit;
3111         }
3112
3113         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3114                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3115                            "using Lenovo default hot key map\n");
3116                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3117                         TPACPI_HOTKEY_MAP_SIZE);
3118         } else {
3119                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3120                            "using IBM default hot key map\n");
3121                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3122                         TPACPI_HOTKEY_MAP_SIZE);
3123         }
3124
3125         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3126         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3127         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3128         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3129         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3130         tpacpi_inputdev->keycode = hotkey_keycode_map;
3131         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3132                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3133                         set_bit(hotkey_keycode_map[i],
3134                                 tpacpi_inputdev->keybit);
3135                 } else {
3136                         if (i < sizeof(hotkey_reserved_mask)*8)
3137                                 hotkey_reserved_mask |= 1 << i;
3138                 }
3139         }
3140
3141         if (tp_features.hotkey_wlsw) {
3142                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3143                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3144         }
3145         if (tp_features.hotkey_tablet) {
3146                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3147                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3148         }
3149
3150         /* Do not issue duplicate brightness change events to
3151          * userspace */
3152         if (!tp_features.bright_acpimode)
3153                 /* update bright_acpimode... */
3154                 tpacpi_check_std_acpi_brightness_support();
3155
3156         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3157                 printk(TPACPI_INFO
3158                        "This ThinkPad has standard ACPI backlight "
3159                        "brightness control, supported by the ACPI "
3160                        "video driver\n");
3161                 printk(TPACPI_NOTICE
3162                        "Disabling thinkpad-acpi brightness events "
3163                        "by default...\n");
3164
3165                 /* The hotkey_reserved_mask change below is not
3166                  * necessary while the keys are at KEY_RESERVED in the
3167                  * default map, but better safe than sorry, leave it
3168                  * here as a marker of what we have to do, especially
3169                  * when we finally become able to set this at runtime
3170                  * on response to X.org requests */
3171                 hotkey_reserved_mask |=
3172                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3173                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3174         }
3175
3176 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3177         if (tp_features.hotkey_mask) {
3178                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3179                                         & ~hotkey_all_mask
3180                                         & ~hotkey_reserved_mask;
3181         } else {
3182                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3183                                         & ~hotkey_reserved_mask;
3184         }
3185
3186         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3187                     "hotkey source mask 0x%08x, polling freq %u\n",
3188                     hotkey_source_mask, hotkey_poll_freq);
3189 #endif
3190
3191         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3192                         "enabling firmware HKEY event interface...\n");
3193         res = hotkey_status_set(true);
3194         if (res) {
3195                 hotkey_exit();
3196                 return res;
3197         }
3198         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3199                                 & ~hotkey_reserved_mask)
3200                                 | hotkey_orig_mask);
3201         if (res < 0 && res != -ENXIO) {
3202                 hotkey_exit();
3203                 return res;
3204         }
3205
3206         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3207                         "legacy ibm/hotkey event reporting over procfs %s\n",
3208                         (hotkey_report_mode < 2) ?
3209                                 "enabled" : "disabled");
3210
3211         tpacpi_inputdev->open = &hotkey_inputdev_open;
3212         tpacpi_inputdev->close = &hotkey_inputdev_close;
3213
3214         hotkey_poll_setup_safe(true);
3215         tpacpi_send_radiosw_update();
3216         tpacpi_input_send_tabletsw();
3217
3218         return 0;
3219
3220 err_exit:
3221         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3222         hotkey_dev_attributes = NULL;
3223
3224         return (res < 0)? res : 1;
3225 }
3226
3227 static bool hotkey_notify_hotkey(const u32 hkey,
3228                                  bool *send_acpi_ev,
3229                                  bool *ignore_acpi_ev)
3230 {
3231         /* 0x1000-0x1FFF: key presses */
3232         unsigned int scancode = hkey & 0xfff;
3233         *send_acpi_ev = true;
3234         *ignore_acpi_ev = false;
3235
3236         if (scancode > 0 && scancode < 0x21) {
3237                 scancode--;
3238                 if (!(hotkey_source_mask & (1 << scancode))) {
3239                         tpacpi_input_send_key(scancode);
3240                         *send_acpi_ev = false;
3241                 } else {
3242                         *ignore_acpi_ev = true;
3243                 }
3244                 return true;
3245         }
3246         return false;
3247 }
3248
3249 static bool hotkey_notify_wakeup(const u32 hkey,
3250                                  bool *send_acpi_ev,
3251                                  bool *ignore_acpi_ev)
3252 {
3253         /* 0x2000-0x2FFF: Wakeup reason */
3254         *send_acpi_ev = true;
3255         *ignore_acpi_ev = false;
3256
3257         switch (hkey) {
3258         case 0x2304: /* suspend, undock */
3259         case 0x2404: /* hibernation, undock */
3260                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3261                 *ignore_acpi_ev = true;
3262                 break;
3263
3264         case 0x2305: /* suspend, bay eject */
3265         case 0x2405: /* hibernation, bay eject */
3266                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3267                 *ignore_acpi_ev = true;
3268                 break;
3269
3270         case 0x2313: /* Battery on critical low level (S3) */
3271         case 0x2413: /* Battery on critical low level (S4) */
3272                 printk(TPACPI_ALERT
3273                         "EMERGENCY WAKEUP: battery almost empty\n");
3274                 /* how to auto-heal: */
3275                 /* 2313: woke up from S3, go to S4/S5 */
3276                 /* 2413: woke up from S4, go to S5 */
3277                 break;
3278
3279         default:
3280                 return false;
3281         }
3282
3283         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3284                 printk(TPACPI_INFO
3285                        "woke up due to a hot-unplug "
3286                        "request...\n");
3287                 hotkey_wakeup_reason_notify_change();
3288         }
3289         return true;
3290 }
3291
3292 static bool hotkey_notify_usrevent(const u32 hkey,
3293                                  bool *send_acpi_ev,
3294                                  bool *ignore_acpi_ev)
3295 {
3296         /* 0x5000-0x5FFF: human interface helpers */
3297         *send_acpi_ev = true;
3298         *ignore_acpi_ev = false;
3299
3300         switch (hkey) {
3301         case 0x5010: /* Lenovo new BIOS: brightness changed */
3302         case 0x500b: /* X61t: tablet pen inserted into bay */
3303         case 0x500c: /* X61t: tablet pen removed from bay */
3304                 return true;
3305
3306         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3307         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3308                 tpacpi_input_send_tabletsw();
3309                 hotkey_tablet_mode_notify_change();
3310                 *send_acpi_ev = false;
3311                 return true;
3312
3313         case 0x5001:
3314         case 0x5002:
3315                 /* LID switch events.  Do not propagate */
3316                 *ignore_acpi_ev = true;
3317                 return true;
3318
3319         default:
3320                 return false;
3321         }
3322 }
3323
3324 static bool hotkey_notify_thermal(const u32 hkey,
3325                                  bool *send_acpi_ev,
3326                                  bool *ignore_acpi_ev)
3327 {
3328         /* 0x6000-0x6FFF: thermal alarms */
3329         *send_acpi_ev = true;
3330         *ignore_acpi_ev = false;
3331
3332         switch (hkey) {
3333         case 0x6011:
3334                 printk(TPACPI_CRIT
3335                         "THERMAL ALARM: battery is too hot!\n");
3336                 /* recommended action: warn user through gui */
3337                 return true;
3338         case 0x6012:
3339                 printk(TPACPI_ALERT
3340                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3341                 /* recommended action: immediate sleep/hibernate */
3342                 return true;
3343         case 0x6021:
3344                 printk(TPACPI_CRIT
3345                         "THERMAL ALARM: "
3346                         "a sensor reports something is too hot!\n");
3347                 /* recommended action: warn user through gui, that */
3348                 /* some internal component is too hot */
3349                 return true;
3350         case 0x6022:
3351                 printk(TPACPI_ALERT
3352                         "THERMAL EMERGENCY: "
3353                         "a sensor reports something is extremely hot!\n");
3354                 /* recommended action: immediate sleep/hibernate */
3355                 return true;
3356         case 0x6030:
3357                 printk(TPACPI_INFO
3358                         "EC reports that Thermal Table has changed\n");
3359                 /* recommended action: do nothing, we don't have
3360                  * Lenovo ATM information */
3361                 return true;
3362         default:
3363                 printk(TPACPI_ALERT
3364                          "THERMAL ALERT: unknown thermal alarm received\n");
3365                 return false;
3366         }
3367 }
3368
3369 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3370 {
3371         u32 hkey;
3372         bool send_acpi_ev;
3373         bool ignore_acpi_ev;
3374         bool known_ev;
3375
3376         if (event != 0x80) {
3377                 printk(TPACPI_ERR
3378                        "unknown HKEY notification event %d\n", event);
3379                 /* forward it to userspace, maybe it knows how to handle it */
3380                 acpi_bus_generate_netlink_event(
3381                                         ibm->acpi->device->pnp.device_class,
3382                                         dev_name(&ibm->acpi->device->dev),
3383                                         event, 0);
3384                 return;
3385         }
3386
3387         while (1) {
3388                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3389                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3390                         return;
3391                 }
3392
3393                 if (hkey == 0) {
3394                         /* queue empty */
3395                         return;
3396                 }
3397
3398                 send_acpi_ev = true;
3399                 ignore_acpi_ev = false;
3400
3401                 switch (hkey >> 12) {
3402                 case 1:
3403                         /* 0x1000-0x1FFF: key presses */
3404                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3405                                                  &ignore_acpi_ev);
3406                         break;
3407                 case 2:
3408                         /* 0x2000-0x2FFF: Wakeup reason */
3409                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3410                                                  &ignore_acpi_ev);
3411                         break;
3412                 case 3:
3413                         /* 0x3000-0x3FFF: bay-related wakeups */
3414                         if (hkey == 0x3003) {
3415                                 hotkey_autosleep_ack = 1;
3416                                 printk(TPACPI_INFO
3417                                        "bay ejected\n");
3418                                 hotkey_wakeup_hotunplug_complete_notify_change();
3419                                 known_ev = true;
3420                         } else {
3421                                 known_ev = false;
3422                         }
3423                         break;
3424                 case 4:
3425                         /* 0x4000-0x4FFF: dock-related wakeups */
3426                         if (hkey == 0x4003) {
3427                                 hotkey_autosleep_ack = 1;
3428                                 printk(TPACPI_INFO
3429                                        "undocked\n");
3430                                 hotkey_wakeup_hotunplug_complete_notify_change();
3431                                 known_ev = true;
3432                         } else {
3433                                 known_ev = false;
3434                         }
3435                         break;
3436                 case 5:
3437                         /* 0x5000-0x5FFF: human interface helpers */
3438                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3439                                                  &ignore_acpi_ev);
3440                         break;
3441                 case 6:
3442                         /* 0x6000-0x6FFF: thermal alarms */
3443                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3444                                                  &ignore_acpi_ev);
3445                         break;
3446                 case 7:
3447                         /* 0x7000-0x7FFF: misc */
3448                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3449                                 tpacpi_send_radiosw_update();
3450                                 send_acpi_ev = 0;
3451                                 known_ev = true;
3452                                 break;
3453                         }
3454                         /* fallthrough to default */
3455                 default:
3456                         known_ev = false;
3457                 }
3458                 if (!known_ev) {
3459                         printk(TPACPI_NOTICE
3460                                "unhandled HKEY event 0x%04x\n", hkey);
3461                         printk(TPACPI_NOTICE
3462                                "please report the conditions when this "
3463                                "event happened to %s\n", TPACPI_MAIL);
3464                 }
3465
3466                 /* Legacy events */
3467                 if (!ignore_acpi_ev &&
3468                     (send_acpi_ev || hotkey_report_mode < 2)) {
3469                         acpi_bus_generate_proc_event(ibm->acpi->device,
3470                                                      event, hkey);
3471                 }
3472
3473                 /* netlink events */
3474                 if (!ignore_acpi_ev && send_acpi_ev) {
3475                         acpi_bus_generate_netlink_event(
3476                                         ibm->acpi->device->pnp.device_class,
3477                                         dev_name(&ibm->acpi->device->dev),
3478                                         event, hkey);
3479                 }
3480         }
3481 }
3482
3483 static void hotkey_suspend(pm_message_t state)
3484 {
3485         /* Do these on suspend, we get the events on early resume! */
3486         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3487         hotkey_autosleep_ack = 0;
3488 }
3489
3490 static void hotkey_resume(void)
3491 {
3492         tpacpi_disable_brightness_delay();
3493
3494         if (hotkey_mask_get())
3495                 printk(TPACPI_ERR
3496                        "error while trying to read hot key mask "
3497                        "from firmware\n");
3498         tpacpi_send_radiosw_update();
3499         hotkey_tablet_mode_notify_change();
3500         hotkey_wakeup_reason_notify_change();
3501         hotkey_wakeup_hotunplug_complete_notify_change();
3502         hotkey_poll_setup_safe(false);
3503 }
3504
3505 /* procfs -------------------------------------------------------------- */
3506 static int hotkey_read(char *p)
3507 {
3508         int res, status;
3509         int len = 0;
3510
3511         if (!tp_features.hotkey) {
3512                 len += sprintf(p + len, "status:\t\tnot supported\n");
3513                 return len;
3514         }
3515
3516         if (mutex_lock_killable(&hotkey_mutex))
3517                 return -ERESTARTSYS;
3518         res = hotkey_status_get(&status);
3519         if (!res)
3520                 res = hotkey_mask_get();
3521         mutex_unlock(&hotkey_mutex);
3522         if (res)
3523                 return res;
3524
3525         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3526         if (tp_features.hotkey_mask) {
3527                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3528                 len += sprintf(p + len,
3529                                "commands:\tenable, disable, reset, <mask>\n");
3530         } else {
3531                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3532                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3533         }
3534
3535         return len;
3536 }
3537
3538 static void hotkey_enabledisable_warn(bool enable)
3539 {
3540         tpacpi_log_usertask("procfs hotkey enable/disable");
3541         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3542                         TPACPI_WARN
3543                         "hotkey enable/disable functionality has been "
3544                         "removed from the driver.  Hotkeys are always "
3545                         "enabled\n"))
3546                 printk(TPACPI_ERR
3547                         "Please remove the hotkey=enable module "
3548                         "parameter, it is deprecated.  Hotkeys are always "
3549                         "enabled\n");
3550 }
3551
3552 static int hotkey_write(char *buf)
3553 {
3554         int res;
3555         u32 mask;
3556         char *cmd;
3557
3558         if (!tp_features.hotkey)
3559                 return -ENODEV;
3560
3561         if (mutex_lock_killable(&hotkey_mutex))
3562                 return -ERESTARTSYS;
3563
3564         mask = hotkey_mask;
3565
3566         res = 0;
3567         while ((cmd = next_cmd(&buf))) {
3568                 if (strlencmp(cmd, "enable") == 0) {
3569                         hotkey_enabledisable_warn(1);
3570                 } else if (strlencmp(cmd, "disable") == 0) {
3571                         hotkey_enabledisable_warn(0);
3572                         res = -EPERM;
3573                 } else if (strlencmp(cmd, "reset") == 0) {
3574                         mask = (hotkey_all_mask | hotkey_source_mask)
3575                                 & ~hotkey_reserved_mask;
3576                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3577                         /* mask set */
3578                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3579                         /* mask set */
3580                 } else {
3581                         res = -EINVAL;
3582                         goto errexit;
3583                 }
3584         }
3585
3586         if (!res)
3587                 tpacpi_disclose_usertask("procfs hotkey",
3588                         "set mask to 0x%08x\n", mask);
3589
3590         if (!res && mask != hotkey_mask)
3591                 res = hotkey_mask_set(mask);
3592
3593 errexit:
3594         mutex_unlock(&hotkey_mutex);
3595         return res;
3596 }
3597
3598 static const struct acpi_device_id ibm_htk_device_ids[] = {
3599         {TPACPI_ACPI_HKEY_HID, 0},
3600         {"", 0},
3601 };
3602
3603 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3604         .hid = ibm_htk_device_ids,
3605         .notify = hotkey_notify,
3606         .handle = &hkey_handle,
3607         .type = ACPI_DEVICE_NOTIFY,
3608 };
3609
3610 static struct ibm_struct hotkey_driver_data = {
3611         .name = "hotkey",
3612         .read = hotkey_read,
3613         .write = hotkey_write,
3614         .exit = hotkey_exit,
3615         .resume = hotkey_resume,
3616         .suspend = hotkey_suspend,
3617         .acpi = &ibm_hotkey_acpidriver,
3618 };
3619
3620 /*************************************************************************
3621  * Bluetooth subdriver
3622  */
3623
3624 enum {
3625         /* ACPI GBDC/SBDC bits */
3626         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3627         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3628         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3629                                                    off / last state */
3630 };
3631
3632 enum {
3633         /* ACPI \BLTH commands */
3634         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3635         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3636         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3637         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3638         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3639 };
3640
3641 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3642
3643 static void bluetooth_suspend(pm_message_t state)
3644 {
3645         /* Try to make sure radio will resume powered off */
3646         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3647                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3648                 vdbg_printk(TPACPI_DBG_RFKILL,
3649                         "bluetooth power down on resume request failed\n");
3650 }
3651
3652 static int bluetooth_get_status(void)
3653 {
3654         int status;
3655
3656 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3657         if (dbg_bluetoothemul)
3658                 return (tpacpi_bluetooth_emulstate) ?
3659                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3660 #endif
3661
3662         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3663                 return -EIO;
3664
3665         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3666                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3667 }
3668
3669 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3670 {
3671         int status;
3672
3673         vdbg_printk(TPACPI_DBG_RFKILL,
3674                 "will attempt to %s bluetooth\n",
3675                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3676
3677 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3678         if (dbg_bluetoothemul) {
3679                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3680                 return 0;
3681         }
3682 #endif
3683
3684         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3685         if (state == TPACPI_RFK_RADIO_ON)
3686                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3687         else
3688                 status = 0;
3689
3690         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3691                 return -EIO;
3692
3693         return 0;
3694 }
3695
3696 /* sysfs bluetooth enable ---------------------------------------------- */
3697 static ssize_t bluetooth_enable_show(struct device *dev,
3698                            struct device_attribute *attr,
3699                            char *buf)
3700 {
3701         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3702                         attr, buf);
3703 }
3704
3705 static ssize_t bluetooth_enable_store(struct device *dev,
3706                             struct device_attribute *attr,
3707                             const char *buf, size_t count)
3708 {
3709         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3710                                 attr, buf, count);
3711 }
3712
3713 static struct device_attribute dev_attr_bluetooth_enable =
3714         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3715                 bluetooth_enable_show, bluetooth_enable_store);
3716
3717 /* --------------------------------------------------------------------- */
3718
3719 static struct attribute *bluetooth_attributes[] = {
3720         &dev_attr_bluetooth_enable.attr,
3721         NULL
3722 };
3723
3724 static const struct attribute_group bluetooth_attr_group = {
3725         .attrs = bluetooth_attributes,
3726 };
3727
3728 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3729         .get_status = bluetooth_get_status,
3730         .set_status = bluetooth_set_status,
3731 };
3732
3733 static void bluetooth_shutdown(void)
3734 {
3735         /* Order firmware to save current state to NVRAM */
3736         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3737                         TP_ACPI_BLTH_SAVE_STATE))
3738                 printk(TPACPI_NOTICE
3739                         "failed to save bluetooth state to NVRAM\n");
3740         else
3741                 vdbg_printk(TPACPI_DBG_RFKILL,
3742                         "bluestooth state saved to NVRAM\n");
3743 }
3744
3745 static void bluetooth_exit(void)
3746 {
3747         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3748                         &bluetooth_attr_group);
3749
3750         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3751
3752         bluetooth_shutdown();
3753 }
3754
3755 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3756 {
3757         int res;
3758         int status = 0;
3759
3760         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3761                         "initializing bluetooth subdriver\n");
3762
3763         TPACPI_ACPIHANDLE_INIT(hkey);
3764
3765         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3766            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3767         tp_features.bluetooth = hkey_handle &&
3768             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3769
3770         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3771                 "bluetooth is %s, status 0x%02x\n",
3772                 str_supported(tp_features.bluetooth),
3773                 status);
3774
3775 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3776         if (dbg_bluetoothemul) {
3777                 tp_features.bluetooth = 1;
3778                 printk(TPACPI_INFO
3779                         "bluetooth switch emulation enabled\n");
3780         } else
3781 #endif
3782         if (tp_features.bluetooth &&
3783             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3784                 /* no bluetooth hardware present in system */
3785                 tp_features.bluetooth = 0;
3786                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3787                            "bluetooth hardware not installed\n");
3788         }
3789
3790         if (!tp_features.bluetooth)
3791                 return 1;
3792
3793         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3794                                 &bluetooth_tprfk_ops,
3795                                 RFKILL_TYPE_BLUETOOTH,
3796                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3797                                 true);
3798         if (res)
3799                 return res;
3800
3801         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3802                                 &bluetooth_attr_group);
3803         if (res) {
3804                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3805                 return res;
3806         }
3807
3808         return 0;
3809 }
3810
3811 /* procfs -------------------------------------------------------------- */
3812 static int bluetooth_read(char *p)
3813 {
3814         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3815 }
3816
3817 static int bluetooth_write(char *buf)
3818 {
3819         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3820 }
3821
3822 static struct ibm_struct bluetooth_driver_data = {
3823         .name = "bluetooth",
3824         .read = bluetooth_read,
3825         .write = bluetooth_write,
3826         .exit = bluetooth_exit,
3827         .suspend = bluetooth_suspend,
3828         .shutdown = bluetooth_shutdown,
3829 };
3830
3831 /*************************************************************************
3832  * Wan subdriver
3833  */
3834
3835 enum {
3836         /* ACPI GWAN/SWAN bits */
3837         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3838         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3839         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3840                                                    off / last state */
3841 };
3842
3843 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3844
3845 static void wan_suspend(pm_message_t state)
3846 {
3847         /* Try to make sure radio will resume powered off */
3848         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3849                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3850                 vdbg_printk(TPACPI_DBG_RFKILL,
3851                         "WWAN power down on resume request failed\n");
3852 }
3853
3854 static int wan_get_status(void)
3855 {
3856         int status;
3857
3858 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3859         if (dbg_wwanemul)
3860                 return (tpacpi_wwan_emulstate) ?
3861                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3862 #endif
3863
3864         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3865                 return -EIO;
3866
3867         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3868                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3869 }
3870
3871 static int wan_set_status(enum tpacpi_rfkill_state state)
3872 {
3873         int status;
3874
3875         vdbg_printk(TPACPI_DBG_RFKILL,
3876                 "will attempt to %s wwan\n",
3877                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3878
3879 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3880         if (dbg_wwanemul) {
3881                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3882                 return 0;
3883         }
3884 #endif
3885
3886         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3887         if (state == TPACPI_RFK_RADIO_ON)
3888                 status = TP_ACPI_WANCARD_RADIOSSW;
3889         else
3890                 status = 0;
3891
3892         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3893                 return -EIO;
3894
3895         return 0;
3896 }
3897
3898 /* sysfs wan enable ---------------------------------------------------- */
3899 static ssize_t wan_enable_show(struct device *dev,
3900                            struct device_attribute *attr,
3901                            char *buf)
3902 {
3903         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3904                         attr, buf);
3905 }
3906
3907 static ssize_t wan_enable_store(struct device *dev,
3908                             struct device_attribute *attr,
3909                             const char *buf, size_t count)
3910 {
3911         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3912                         attr, buf, count);
3913 }
3914
3915 static struct device_attribute dev_attr_wan_enable =
3916         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3917                 wan_enable_show, wan_enable_store);
3918
3919 /* --------------------------------------------------------------------- */
3920
3921 static struct attribute *wan_attributes[] = {
3922         &dev_attr_wan_enable.attr,
3923         NULL
3924 };
3925
3926 static const struct attribute_group wan_attr_group = {
3927         .attrs = wan_attributes,
3928 };
3929
3930 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3931         .get_status = wan_get_status,
3932         .set_status = wan_set_status,
3933 };
3934
3935 static void wan_shutdown(void)
3936 {
3937         /* Order firmware to save current state to NVRAM */
3938         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3939                         TP_ACPI_WGSV_SAVE_STATE))
3940                 printk(TPACPI_NOTICE
3941                         "failed to save WWAN state to NVRAM\n");
3942         else
3943                 vdbg_printk(TPACPI_DBG_RFKILL,
3944                         "WWAN state saved to NVRAM\n");
3945 }
3946
3947 static void wan_exit(void)
3948 {
3949         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3950                 &wan_attr_group);
3951
3952         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3953
3954         wan_shutdown();
3955 }
3956
3957 static int __init wan_init(struct ibm_init_struct *iibm)
3958 {
3959         int res;
3960         int status = 0;
3961
3962         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3963                         "initializing wan subdriver\n");
3964
3965         TPACPI_ACPIHANDLE_INIT(hkey);
3966
3967         tp_features.wan = hkey_handle &&
3968             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3969
3970         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3971                 "wan is %s, status 0x%02x\n",
3972                 str_supported(tp_features.wan),
3973                 status);
3974
3975 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3976         if (dbg_wwanemul) {
3977                 tp_features.wan = 1;
3978                 printk(TPACPI_INFO
3979                         "wwan switch emulation enabled\n");
3980         } else
3981 #endif
3982         if (tp_features.wan &&
3983             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3984                 /* no wan hardware present in system */
3985                 tp_features.wan = 0;
3986                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3987                            "wan hardware not installed\n");
3988         }
3989
3990         if (!tp_features.wan)
3991                 return 1;
3992
3993         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3994                                 &wan_tprfk_ops,
3995                                 RFKILL_TYPE_WWAN,
3996                                 TPACPI_RFK_WWAN_SW_NAME,
3997                                 true);
3998         if (res)
3999                 return res;
4000
4001         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4002                                 &wan_attr_group);
4003
4004         if (res) {
4005                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4006                 return res;
4007         }
4008
4009         return 0;
4010 }
4011
4012 /* procfs -------------------------------------------------------------- */
4013 static int wan_read(char *p)
4014 {
4015         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4016 }
4017
4018 static int wan_write(char *buf)
4019 {
4020         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4021 }
4022
4023 static struct ibm_struct wan_driver_data = {
4024         .name = "wan",
4025         .read = wan_read,
4026         .write = wan_write,
4027         .exit = wan_exit,
4028         .suspend = wan_suspend,
4029         .shutdown = wan_shutdown,
4030 };
4031
4032 /*************************************************************************
4033  * UWB subdriver
4034  */
4035
4036 enum {
4037         /* ACPI GUWB/SUWB bits */
4038         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4039         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4040 };
4041
4042 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4043
4044 static int uwb_get_status(void)
4045 {
4046         int status;
4047
4048 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4049         if (dbg_uwbemul)
4050                 return (tpacpi_uwb_emulstate) ?
4051                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4052 #endif
4053
4054         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4055                 return -EIO;
4056
4057         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4058                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4059 }
4060
4061 static int uwb_set_status(enum tpacpi_rfkill_state state)
4062 {
4063         int status;
4064
4065         vdbg_printk(TPACPI_DBG_RFKILL,
4066                 "will attempt to %s UWB\n",
4067                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4068
4069 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4070         if (dbg_uwbemul) {
4071                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4072                 return 0;
4073         }
4074 #endif
4075
4076         if (state == TPACPI_RFK_RADIO_ON)
4077                 status = TP_ACPI_UWB_RADIOSSW;
4078         else
4079                 status = 0;
4080
4081         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4082                 return -EIO;
4083
4084         return 0;
4085 }
4086
4087 /* --------------------------------------------------------------------- */
4088
4089 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4090         .get_status = uwb_get_status,
4091         .set_status = uwb_set_status,
4092 };
4093
4094 static void uwb_exit(void)
4095 {
4096         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4097 }
4098
4099 static int __init uwb_init(struct ibm_init_struct *iibm)
4100 {
4101         int res;
4102         int status = 0;
4103
4104         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4105                         "initializing uwb subdriver\n");
4106
4107         TPACPI_ACPIHANDLE_INIT(hkey);
4108
4109         tp_features.uwb = hkey_handle &&
4110             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4111
4112         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4113                 "uwb is %s, status 0x%02x\n",
4114                 str_supported(tp_features.uwb),
4115                 status);
4116
4117 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4118         if (dbg_uwbemul) {
4119                 tp_features.uwb = 1;
4120                 printk(TPACPI_INFO
4121                         "uwb switch emulation enabled\n");
4122         } else
4123 #endif
4124         if (tp_features.uwb &&
4125             !(status & TP_ACPI_UWB_HWPRESENT)) {
4126                 /* no uwb hardware present in system */
4127                 tp_features.uwb = 0;
4128                 dbg_printk(TPACPI_DBG_INIT,
4129                            "uwb hardware not installed\n");
4130         }
4131
4132         if (!tp_features.uwb)
4133                 return 1;
4134
4135         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4136                                 &uwb_tprfk_ops,
4137                                 RFKILL_TYPE_UWB,
4138                                 TPACPI_RFK_UWB_SW_NAME,
4139                                 false);
4140         return res;
4141 }
4142
4143 static struct ibm_struct uwb_driver_data = {
4144         .name = "uwb",
4145         .exit = uwb_exit,
4146         .flags.experimental = 1,
4147 };
4148
4149 /*************************************************************************
4150  * Video subdriver
4151  */
4152
4153 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4154
4155 enum video_access_mode {
4156         TPACPI_VIDEO_NONE = 0,
4157         TPACPI_VIDEO_570,       /* 570 */
4158         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4159         TPACPI_VIDEO_NEW,       /* all others */
4160 };
4161
4162 enum {  /* video status flags, based on VIDEO_570 */
4163         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4164         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4165         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4166 };
4167
4168 enum {  /* TPACPI_VIDEO_570 constants */
4169         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4170         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4171                                                  * video_status_flags */
4172         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4173         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4174 };
4175
4176 static enum video_access_mode video_supported;
4177 static int video_orig_autosw;
4178
4179 static int video_autosw_get(void);
4180 static int video_autosw_set(int enable);
4181
4182 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4183
4184 static int __init video_init(struct ibm_init_struct *iibm)
4185 {
4186         int ivga;
4187
4188         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4189
4190         TPACPI_ACPIHANDLE_INIT(vid);
4191         TPACPI_ACPIHANDLE_INIT(vid2);
4192
4193         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4194                 /* G41, assume IVGA doesn't change */
4195                 vid_handle = vid2_handle;
4196
4197         if (!vid_handle)
4198                 /* video switching not supported on R30, R31 */
4199                 video_supported = TPACPI_VIDEO_NONE;
4200         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4201                 /* 570 */
4202                 video_supported = TPACPI_VIDEO_570;
4203         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4204                 /* 600e/x, 770e, 770x */
4205                 video_supported = TPACPI_VIDEO_770;
4206         else
4207                 /* all others */
4208                 video_supported = TPACPI_VIDEO_NEW;
4209
4210         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4211                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4212                 video_supported);
4213
4214         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4215 }
4216
4217 static void video_exit(void)
4218 {
4219         dbg_printk(TPACPI_DBG_EXIT,
4220                    "restoring original video autoswitch mode\n");
4221         if (video_autosw_set(video_orig_autosw))
4222                 printk(TPACPI_ERR "error while trying to restore original "
4223                         "video autoswitch mode\n");
4224 }
4225
4226 static int video_outputsw_get(void)
4227 {
4228         int status = 0;
4229         int i;
4230
4231         switch (video_supported) {
4232         case TPACPI_VIDEO_570:
4233                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4234                                  TP_ACPI_VIDEO_570_PHSCMD))
4235                         return -EIO;
4236                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4237                 break;
4238         case TPACPI_VIDEO_770:
4239                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4240                         return -EIO;
4241                 if (i)
4242                         status |= TP_ACPI_VIDEO_S_LCD;
4243                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4244                         return -EIO;
4245                 if (i)
4246                         status |= TP_ACPI_VIDEO_S_CRT;
4247                 break;
4248         case TPACPI_VIDEO_NEW:
4249                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4250                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4251                         return -EIO;
4252                 if (i)
4253                         status |= TP_ACPI_VIDEO_S_CRT;
4254
4255                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4256                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4257                         return -EIO;
4258                 if (i)
4259                         status |= TP_ACPI_VIDEO_S_LCD;
4260                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4261                         return -EIO;
4262                 if (i)
4263                         status |= TP_ACPI_VIDEO_S_DVI;
4264                 break;
4265         default:
4266                 return -ENOSYS;
4267         }
4268
4269         return status;
4270 }
4271
4272 static int video_outputsw_set(int status)
4273 {
4274         int autosw;
4275         int res = 0;
4276
4277         switch (video_supported) {
4278         case TPACPI_VIDEO_570:
4279                 res = acpi_evalf(NULL, NULL,
4280                                  "\\_SB.PHS2", "vdd",
4281                                  TP_ACPI_VIDEO_570_PHS2CMD,
4282                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4283                 break;
4284         case TPACPI_VIDEO_770:
4285                 autosw = video_autosw_get();
4286                 if (autosw < 0)
4287                         return autosw;
4288
4289                 res = video_autosw_set(1);
4290                 if (res)
4291                         return res;
4292                 res = acpi_evalf(vid_handle, NULL,
4293                                  "ASWT", "vdd", status * 0x100, 0);
4294                 if (!autosw && video_autosw_set(autosw)) {
4295                         printk(TPACPI_ERR
4296                                "video auto-switch left enabled due to error\n");
4297                         return -EIO;
4298                 }
4299                 break;
4300         case TPACPI_VIDEO_NEW:
4301                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4302                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4303                 break;
4304         default:
4305                 return -ENOSYS;
4306         }
4307
4308         return (res)? 0 : -EIO;
4309 }
4310
4311 static int video_autosw_get(void)
4312 {
4313         int autosw = 0;
4314
4315         switch (video_supported) {
4316         case TPACPI_VIDEO_570:
4317                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4318                         return -EIO;
4319                 break;
4320         case TPACPI_VIDEO_770:
4321         case TPACPI_VIDEO_NEW:
4322                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4323                         return -EIO;
4324                 break;
4325         default:
4326                 return -ENOSYS;
4327         }
4328
4329         return autosw & 1;
4330 }
4331
4332 static int video_autosw_set(int enable)
4333 {
4334         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4335                 return -EIO;
4336         return 0;
4337 }
4338
4339 static int video_outputsw_cycle(void)
4340 {
4341         int autosw = video_autosw_get();
4342         int res;
4343
4344         if (autosw < 0)
4345                 return autosw;
4346
4347         switch (video_supported) {
4348         case TPACPI_VIDEO_570:
4349                 res = video_autosw_set(1);
4350                 if (res)
4351                         return res;
4352                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4353                 break;
4354         case TPACPI_VIDEO_770:
4355         case TPACPI_VIDEO_NEW:
4356                 res = video_autosw_set(1);
4357                 if (res)
4358                         return res;
4359                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4360                 break;
4361         default:
4362                 return -ENOSYS;
4363         }
4364         if (!autosw && video_autosw_set(autosw)) {
4365                 printk(TPACPI_ERR
4366                        "video auto-switch left enabled due to error\n");
4367                 return -EIO;
4368         }
4369
4370         return (res)? 0 : -EIO;
4371 }
4372
4373 static int video_expand_toggle(void)
4374 {
4375         switch (video_supported) {
4376         case TPACPI_VIDEO_570:
4377                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4378                         0 : -EIO;
4379         case TPACPI_VIDEO_770:
4380                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4381                         0 : -EIO;
4382         case TPACPI_VIDEO_NEW:
4383                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4384                         0 : -EIO;
4385         default:
4386                 return -ENOSYS;
4387         }
4388         /* not reached */
4389 }
4390
4391 static int video_read(char *p)
4392 {
4393         int status, autosw;
4394         int len = 0;
4395
4396         if (video_supported == TPACPI_VIDEO_NONE) {
4397                 len += sprintf(p + len, "status:\t\tnot supported\n");
4398                 return len;
4399         }
4400
4401         status = video_outputsw_get();
4402         if (status < 0)
4403                 return status;
4404
4405         autosw = video_autosw_get();
4406         if (autosw < 0)
4407                 return autosw;
4408
4409         len += sprintf(p + len, "status:\t\tsupported\n");
4410         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4411         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4412         if (video_supported == TPACPI_VIDEO_NEW)
4413                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4414         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4415         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4416         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4417         if (video_supported == TPACPI_VIDEO_NEW)
4418                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4419         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4420         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4421
4422         return len;
4423 }
4424
4425 static int video_write(char *buf)
4426 {
4427         char *cmd;
4428         int enable, disable, status;
4429         int res;
4430
4431         if (video_supported == TPACPI_VIDEO_NONE)
4432                 return -ENODEV;
4433
4434         enable = 0;
4435         disable = 0;
4436
4437         while ((cmd = next_cmd(&buf))) {
4438                 if (strlencmp(cmd, "lcd_enable") == 0) {
4439                         enable |= TP_ACPI_VIDEO_S_LCD;
4440                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4441                         disable |= TP_ACPI_VIDEO_S_LCD;
4442                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4443                         enable |= TP_ACPI_VIDEO_S_CRT;
4444                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4445                         disable |= TP_ACPI_VIDEO_S_CRT;
4446                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4447                            strlencmp(cmd, "dvi_enable") == 0) {
4448                         enable |= TP_ACPI_VIDEO_S_DVI;
4449                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4450                            strlencmp(cmd, "dvi_disable") == 0) {
4451                         disable |= TP_ACPI_VIDEO_S_DVI;
4452                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4453                         res = video_autosw_set(1);
4454                         if (res)
4455                                 return res;
4456                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4457                         res = video_autosw_set(0);
4458                         if (res)
4459                                 return res;
4460                 } else if (strlencmp(cmd, "video_switch") == 0) {
4461                         res = video_outputsw_cycle();
4462                         if (res)
4463                                 return res;
4464                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4465                         res = video_expand_toggle();
4466                         if (res)
4467                                 return res;
4468                 } else
4469                         return -EINVAL;
4470         }
4471
4472         if (enable || disable) {
4473                 status = video_outputsw_get();
4474                 if (status < 0)
4475                         return status;
4476                 res = video_outputsw_set((status & ~disable) | enable);
4477                 if (res)
4478                         return res;
4479         }
4480
4481         return 0;
4482 }
4483
4484 static struct ibm_struct video_driver_data = {
4485         .name = "video",
4486         .read = video_read,
4487         .write = video_write,
4488         .exit = video_exit,
4489 };
4490
4491 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4492
4493 /*************************************************************************
4494  * Light (thinklight) subdriver
4495  */
4496
4497 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4498 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4499
4500 static int light_get_status(void)
4501 {
4502         int status = 0;
4503
4504         if (tp_features.light_status) {
4505                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4506                         return -EIO;
4507                 return (!!status);
4508         }
4509
4510         return -ENXIO;
4511 }
4512
4513 static int light_set_status(int status)
4514 {
4515         int rc;
4516
4517         if (tp_features.light) {
4518                 if (cmos_handle) {
4519                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4520                                         (status)?
4521                                                 TP_CMOS_THINKLIGHT_ON :
4522                                                 TP_CMOS_THINKLIGHT_OFF);
4523                 } else {
4524                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4525                                         (status)? 1 : 0);
4526                 }
4527                 return (rc)? 0 : -EIO;
4528         }
4529
4530         return -ENXIO;
4531 }
4532
4533 static void light_set_status_worker(struct work_struct *work)
4534 {
4535         struct tpacpi_led_classdev *data =
4536                         container_of(work, struct tpacpi_led_classdev, work);
4537
4538         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4539                 light_set_status((data->new_state != TPACPI_LED_OFF));
4540 }
4541
4542 static void light_sysfs_set(struct led_classdev *led_cdev,
4543                         enum led_brightness brightness)
4544 {
4545         struct tpacpi_led_classdev *data =
4546                 container_of(led_cdev,
4547                              struct tpacpi_led_classdev,
4548                              led_classdev);
4549         data->new_state = (brightness != LED_OFF) ?
4550                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4551         queue_work(tpacpi_wq, &data->work);
4552 }
4553
4554 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4555 {
4556         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4557 }
4558
4559 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4560         .led_classdev = {
4561                 .name           = "tpacpi::thinklight",
4562                 .brightness_set = &light_sysfs_set,
4563                 .brightness_get = &light_sysfs_get,
4564         }
4565 };
4566
4567 static int __init light_init(struct ibm_init_struct *iibm)
4568 {
4569         int rc;
4570
4571         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4572
4573         TPACPI_ACPIHANDLE_INIT(ledb);
4574         TPACPI_ACPIHANDLE_INIT(lght);
4575         TPACPI_ACPIHANDLE_INIT(cmos);
4576         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4577
4578         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4579         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4580
4581         if (tp_features.light)
4582                 /* light status not supported on
4583                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4584                 tp_features.light_status =
4585                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4586
4587         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4588                 str_supported(tp_features.light),
4589                 str_supported(tp_features.light_status));
4590
4591         if (!tp_features.light)
4592                 return 1;
4593
4594         rc = led_classdev_register(&tpacpi_pdev->dev,
4595                                    &tpacpi_led_thinklight.led_classdev);
4596
4597         if (rc < 0) {
4598                 tp_features.light = 0;
4599                 tp_features.light_status = 0;
4600         } else  {
4601                 rc = 0;
4602         }
4603
4604         return rc;
4605 }
4606
4607 static void light_exit(void)
4608 {
4609         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4610         if (work_pending(&tpacpi_led_thinklight.work))
4611                 flush_workqueue(tpacpi_wq);
4612 }
4613
4614 static int light_read(char *p)
4615 {
4616         int len = 0;
4617         int status;
4618
4619         if (!tp_features.light) {
4620                 len += sprintf(p + len, "status:\t\tnot supported\n");
4621         } else if (!tp_features.light_status) {
4622                 len += sprintf(p + len, "status:\t\tunknown\n");
4623                 len += sprintf(p + len, "commands:\ton, off\n");
4624         } else {
4625                 status = light_get_status();
4626                 if (status < 0)
4627                         return status;
4628                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4629                 len += sprintf(p + len, "commands:\ton, off\n");
4630         }
4631
4632         return len;
4633 }
4634
4635 static int light_write(char *buf)
4636 {
4637         char *cmd;
4638         int newstatus = 0;
4639
4640         if (!tp_features.light)
4641                 return -ENODEV;
4642
4643         while ((cmd = next_cmd(&buf))) {
4644                 if (strlencmp(cmd, "on") == 0) {
4645                         newstatus = 1;
4646                 } else if (strlencmp(cmd, "off") == 0) {
4647                         newstatus = 0;
4648                 } else
4649                         return -EINVAL;
4650         }
4651
4652         return light_set_status(newstatus);
4653 }
4654
4655 static struct ibm_struct light_driver_data = {
4656         .name = "light",
4657         .read = light_read,
4658         .write = light_write,
4659         .exit = light_exit,
4660 };
4661
4662 /*************************************************************************
4663  * CMOS subdriver
4664  */
4665
4666 /* sysfs cmos_command -------------------------------------------------- */
4667 static ssize_t cmos_command_store(struct device *dev,
4668                             struct device_attribute *attr,
4669                             const char *buf, size_t count)
4670 {
4671         unsigned long cmos_cmd;
4672         int res;
4673
4674         if (parse_strtoul(buf, 21, &cmos_cmd))
4675                 return -EINVAL;
4676
4677         res = issue_thinkpad_cmos_command(cmos_cmd);
4678         return (res)? res : count;
4679 }
4680
4681 static struct device_attribute dev_attr_cmos_command =
4682         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4683
4684 /* --------------------------------------------------------------------- */
4685
4686 static int __init cmos_init(struct ibm_init_struct *iibm)
4687 {
4688         int res;
4689
4690         vdbg_printk(TPACPI_DBG_INIT,
4691                 "initializing cmos commands subdriver\n");
4692
4693         TPACPI_ACPIHANDLE_INIT(cmos);
4694
4695         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4696                 str_supported(cmos_handle != NULL));
4697
4698         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4699         if (res)
4700                 return res;
4701
4702         return (cmos_handle)? 0 : 1;
4703 }
4704
4705 static void cmos_exit(void)
4706 {
4707         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4708 }
4709
4710 static int cmos_read(char *p)
4711 {
4712         int len = 0;
4713
4714         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4715            R30, R31, T20-22, X20-21 */
4716         if (!cmos_handle)
4717                 len += sprintf(p + len, "status:\t\tnot supported\n");
4718         else {
4719                 len += sprintf(p + len, "status:\t\tsupported\n");
4720                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4721         }
4722
4723         return len;
4724 }
4725
4726 static int cmos_write(char *buf)
4727 {
4728         char *cmd;
4729         int cmos_cmd, res;
4730
4731         while ((cmd = next_cmd(&buf))) {
4732                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4733                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4734                         /* cmos_cmd set */
4735                 } else
4736                         return -EINVAL;
4737
4738                 res = issue_thinkpad_cmos_command(cmos_cmd);
4739                 if (res)
4740                         return res;
4741         }
4742
4743         return 0;
4744 }
4745
4746 static struct ibm_struct cmos_driver_data = {
4747         .name = "cmos",
4748         .read = cmos_read,
4749         .write = cmos_write,
4750         .exit = cmos_exit,
4751 };
4752
4753 /*************************************************************************
4754  * LED subdriver
4755  */
4756
4757 enum led_access_mode {
4758         TPACPI_LED_NONE = 0,
4759         TPACPI_LED_570, /* 570 */
4760         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4761         TPACPI_LED_NEW, /* all others */
4762 };
4763
4764 enum {  /* For TPACPI_LED_OLD */
4765         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4766         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4767         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4768 };
4769
4770 static enum led_access_mode led_supported;
4771
4772 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4773            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4774                                 /* T20-22, X20-21 */
4775            "LED",               /* all others */
4776            );                   /* R30, R31 */
4777
4778 #define TPACPI_LED_NUMLEDS 16
4779 static struct tpacpi_led_classdev *tpacpi_leds;
4780 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4781 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4782         /* there's a limit of 19 chars + NULL before 2.6.26 */
4783         "tpacpi::power",
4784         "tpacpi:orange:batt",
4785         "tpacpi:green:batt",
4786         "tpacpi::dock_active",
4787         "tpacpi::bay_active",
4788         "tpacpi::dock_batt",
4789         "tpacpi::unknown_led",
4790         "tpacpi::standby",
4791         "tpacpi::dock_status1",
4792         "tpacpi::dock_status2",
4793         "tpacpi::unknown_led2",
4794         "tpacpi::unknown_led3",
4795         "tpacpi::thinkvantage",
4796 };
4797 #define TPACPI_SAFE_LEDS        0x1081U
4798
4799 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4800 {
4801 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4802         return false;
4803 #else
4804         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4805 #endif
4806 }
4807
4808 static int led_get_status(const unsigned int led)
4809 {
4810         int status;
4811         enum led_status_t led_s;
4812
4813         switch (led_supported) {
4814         case TPACPI_LED_570:
4815                 if (!acpi_evalf(ec_handle,
4816                                 &status, "GLED", "dd", 1 << led))
4817                         return -EIO;
4818                 led_s = (status == 0)?
4819                                 TPACPI_LED_OFF :
4820                                 ((status == 1)?
4821                                         TPACPI_LED_ON :
4822                                         TPACPI_LED_BLINK);
4823                 tpacpi_led_state_cache[led] = led_s;
4824                 return led_s;
4825         default:
4826                 return -ENXIO;
4827         }
4828
4829         /* not reached */
4830 }
4831
4832 static int led_set_status(const unsigned int led,
4833                           const enum led_status_t ledstatus)
4834 {
4835         /* off, on, blink. Index is led_status_t */
4836         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4837         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4838
4839         int rc = 0;
4840
4841         switch (led_supported) {
4842         case TPACPI_LED_570:
4843                 /* 570 */
4844                 if (unlikely(led > 7))
4845                         return -EINVAL;
4846                 if (unlikely(tpacpi_is_led_restricted(led)))
4847                         return -EPERM;
4848                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4849                                 (1 << led), led_sled_arg1[ledstatus]))
4850                         rc = -EIO;
4851                 break;
4852         case TPACPI_LED_OLD:
4853                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4854                 if (unlikely(led > 7))
4855                         return -EINVAL;
4856                 if (unlikely(tpacpi_is_led_restricted(led)))
4857                         return -EPERM;
4858                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4859                 if (rc >= 0)
4860                         rc = ec_write(TPACPI_LED_EC_HLBL,
4861                                       (ledstatus == TPACPI_LED_BLINK) << led);
4862                 if (rc >= 0)
4863                         rc = ec_write(TPACPI_LED_EC_HLCL,
4864                                       (ledstatus != TPACPI_LED_OFF) << led);
4865                 break;
4866         case TPACPI_LED_NEW:
4867                 /* all others */
4868                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4869                         return -EINVAL;
4870                 if (unlikely(tpacpi_is_led_restricted(led)))
4871                         return -EPERM;
4872                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4873                                 led, led_led_arg1[ledstatus]))
4874                         rc = -EIO;
4875                 break;
4876         default:
4877                 rc = -ENXIO;
4878         }
4879
4880         if (!rc)
4881                 tpacpi_led_state_cache[led] = ledstatus;
4882
4883         return rc;
4884 }
4885
4886 static void led_set_status_worker(struct work_struct *work)
4887 {
4888         struct tpacpi_led_classdev *data =
4889                 container_of(work, struct tpacpi_led_classdev, work);
4890
4891         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4892                 led_set_status(data->led, data->new_state);
4893 }
4894
4895 static void led_sysfs_set(struct led_classdev *led_cdev,
4896                         enum led_brightness brightness)
4897 {
4898         struct tpacpi_led_classdev *data = container_of(led_cdev,
4899                              struct tpacpi_led_classdev, led_classdev);
4900
4901         if (brightness == LED_OFF)
4902                 data->new_state = TPACPI_LED_OFF;
4903         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4904                 data->new_state = TPACPI_LED_ON;
4905         else
4906                 data->new_state = TPACPI_LED_BLINK;
4907
4908         queue_work(tpacpi_wq, &data->work);
4909 }
4910
4911 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4912                         unsigned long *delay_on, unsigned long *delay_off)
4913 {
4914         struct tpacpi_led_classdev *data = container_of(led_cdev,
4915                              struct tpacpi_led_classdev, led_classdev);
4916
4917         /* Can we choose the flash rate? */
4918         if (*delay_on == 0 && *delay_off == 0) {
4919                 /* yes. set them to the hardware blink rate (1 Hz) */
4920                 *delay_on = 500; /* ms */
4921                 *delay_off = 500; /* ms */
4922         } else if ((*delay_on != 500) || (*delay_off != 500))
4923                 return -EINVAL;
4924
4925         data->new_state = TPACPI_LED_BLINK;
4926         queue_work(tpacpi_wq, &data->work);
4927
4928         return 0;
4929 }
4930
4931 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4932 {
4933         int rc;
4934
4935         struct tpacpi_led_classdev *data = container_of(led_cdev,
4936                              struct tpacpi_led_classdev, led_classdev);
4937
4938         rc = led_get_status(data->led);
4939
4940         if (rc == TPACPI_LED_OFF || rc < 0)
4941                 rc = LED_OFF;   /* no error handling in led class :( */
4942         else
4943                 rc = LED_FULL;
4944
4945         return rc;
4946 }
4947
4948 static void led_exit(void)
4949 {
4950         unsigned int i;
4951
4952         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4953                 if (tpacpi_leds[i].led_classdev.name)
4954                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4955         }
4956
4957         kfree(tpacpi_leds);
4958 }
4959
4960 static int __init tpacpi_init_led(unsigned int led)
4961 {
4962         int rc;
4963
4964         tpacpi_leds[led].led = led;
4965
4966         /* LEDs with no name don't get registered */
4967         if (!tpacpi_led_names[led])
4968                 return 0;
4969
4970         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4971         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4972         if (led_supported == TPACPI_LED_570)
4973                 tpacpi_leds[led].led_classdev.brightness_get =
4974                                                 &led_sysfs_get;
4975
4976         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4977
4978         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4979
4980         rc = led_classdev_register(&tpacpi_pdev->dev,
4981                                 &tpacpi_leds[led].led_classdev);
4982         if (rc < 0)
4983                 tpacpi_leds[led].led_classdev.name = NULL;
4984
4985         return rc;
4986 }
4987
4988 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4989         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4990         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4991         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
4992
4993         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
4994         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
4995         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
4996         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
4997         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
4998         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
4999         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5000         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5001
5002         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5003         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5004         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5005         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5006         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5007
5008         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5009         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5010         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5011         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5012
5013         /* (1) - may have excess leds enabled on MSB */
5014
5015         /* Defaults (order matters, keep last, don't reorder!) */
5016         { /* Lenovo */
5017           .vendor = PCI_VENDOR_ID_LENOVO,
5018           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5019           .quirks = 0x1fffU,
5020         },
5021         { /* IBM ThinkPads with no EC version string */
5022           .vendor = PCI_VENDOR_ID_IBM,
5023           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5024           .quirks = 0x00ffU,
5025         },
5026         { /* IBM ThinkPads with EC version string */
5027           .vendor = PCI_VENDOR_ID_IBM,
5028           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5029           .quirks = 0x00bfU,
5030         },
5031 };
5032
5033 #undef TPACPI_LEDQ_IBM
5034 #undef TPACPI_LEDQ_LNV
5035
5036 static int __init led_init(struct ibm_init_struct *iibm)
5037 {
5038         unsigned int i;
5039         int rc;
5040         unsigned long useful_leds;
5041
5042         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5043
5044         TPACPI_ACPIHANDLE_INIT(led);
5045
5046         if (!led_handle)
5047                 /* led not supported on R30, R31 */
5048                 led_supported = TPACPI_LED_NONE;
5049         else if (strlencmp(led_path, "SLED") == 0)
5050                 /* 570 */
5051                 led_supported = TPACPI_LED_570;
5052         else if (strlencmp(led_path, "SYSL") == 0)
5053                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5054                 led_supported = TPACPI_LED_OLD;
5055         else
5056                 /* all others */
5057                 led_supported = TPACPI_LED_NEW;
5058
5059         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5060                 str_supported(led_supported), led_supported);
5061
5062         if (led_supported == TPACPI_LED_NONE)
5063                 return 1;
5064
5065         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5066                               GFP_KERNEL);
5067         if (!tpacpi_leds) {
5068                 printk(TPACPI_ERR "Out of memory for LED data\n");
5069                 return -ENOMEM;
5070         }
5071
5072         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5073                                           ARRAY_SIZE(led_useful_qtable));
5074
5075         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5076                 if (!tpacpi_is_led_restricted(i) &&
5077                     test_bit(i, &useful_leds)) {
5078                         rc = tpacpi_init_led(i);
5079                         if (rc < 0) {
5080                                 led_exit();
5081                                 return rc;
5082                         }
5083                 }
5084         }
5085
5086 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5087         printk(TPACPI_NOTICE
5088                 "warning: userspace override of important "
5089                 "firmware LEDs is enabled\n");
5090 #endif
5091         return 0;
5092 }
5093
5094 #define str_led_status(s) \
5095         ((s) == TPACPI_LED_OFF ? "off" : \
5096                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5097
5098 static int led_read(char *p)
5099 {
5100         int len = 0;
5101
5102         if (!led_supported) {
5103                 len += sprintf(p + len, "status:\t\tnot supported\n");
5104                 return len;
5105         }
5106         len += sprintf(p + len, "status:\t\tsupported\n");
5107
5108         if (led_supported == TPACPI_LED_570) {
5109                 /* 570 */
5110                 int i, status;
5111                 for (i = 0; i < 8; i++) {
5112                         status = led_get_status(i);
5113                         if (status < 0)
5114                                 return -EIO;
5115                         len += sprintf(p + len, "%d:\t\t%s\n",
5116                                        i, str_led_status(status));
5117                 }
5118         }
5119
5120         len += sprintf(p + len, "commands:\t"
5121                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5122
5123         return len;
5124 }
5125
5126 static int led_write(char *buf)
5127 {
5128         char *cmd;
5129         int led, rc;
5130         enum led_status_t s;
5131
5132         if (!led_supported)
5133                 return -ENODEV;
5134
5135         while ((cmd = next_cmd(&buf))) {
5136                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5137                         return -EINVAL;
5138
5139                 if (strstr(cmd, "off")) {
5140                         s = TPACPI_LED_OFF;
5141                 } else if (strstr(cmd, "on")) {
5142                         s = TPACPI_LED_ON;
5143                 } else if (strstr(cmd, "blink")) {
5144                         s = TPACPI_LED_BLINK;
5145                 } else {
5146                         return -EINVAL;
5147                 }
5148
5149                 rc = led_set_status(led, s);
5150                 if (rc < 0)
5151                         return rc;
5152         }
5153
5154         return 0;
5155 }
5156
5157 static struct ibm_struct led_driver_data = {
5158         .name = "led",
5159         .read = led_read,
5160         .write = led_write,
5161         .exit = led_exit,
5162 };
5163
5164 /*************************************************************************
5165  * Beep subdriver
5166  */
5167
5168 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5169
5170 #define TPACPI_BEEP_Q1 0x0001
5171
5172 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5173         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5174         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5175 };
5176
5177 static int __init beep_init(struct ibm_init_struct *iibm)
5178 {
5179         unsigned long quirks;
5180
5181         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5182
5183         TPACPI_ACPIHANDLE_INIT(beep);
5184
5185         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5186                 str_supported(beep_handle != NULL));
5187
5188         quirks = tpacpi_check_quirks(beep_quirk_table,
5189                                      ARRAY_SIZE(beep_quirk_table));
5190
5191         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5192
5193         return (beep_handle)? 0 : 1;
5194 }
5195
5196 static int beep_read(char *p)
5197 {
5198         int len = 0;
5199
5200         if (!beep_handle)
5201                 len += sprintf(p + len, "status:\t\tnot supported\n");
5202         else {
5203                 len += sprintf(p + len, "status:\t\tsupported\n");
5204                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5205         }
5206
5207         return len;
5208 }
5209
5210 static int beep_write(char *buf)
5211 {
5212         char *cmd;
5213         int beep_cmd;
5214
5215         if (!beep_handle)
5216                 return -ENODEV;
5217
5218         while ((cmd = next_cmd(&buf))) {
5219                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5220                     beep_cmd >= 0 && beep_cmd <= 17) {
5221                         /* beep_cmd set */
5222                 } else
5223                         return -EINVAL;
5224                 if (tp_features.beep_needs_two_args) {
5225                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5226                                         beep_cmd, 0))
5227                                 return -EIO;
5228                 } else {
5229                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5230                                         beep_cmd))
5231                                 return -EIO;
5232                 }
5233         }
5234
5235         return 0;
5236 }
5237
5238 static struct ibm_struct beep_driver_data = {
5239         .name = "beep",
5240         .read = beep_read,
5241         .write = beep_write,
5242 };
5243
5244 /*************************************************************************
5245  * Thermal subdriver
5246  */
5247
5248 enum thermal_access_mode {
5249         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5250         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5251         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5252         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5253         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5254 };
5255
5256 enum { /* TPACPI_THERMAL_TPEC_* */
5257         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5258         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5259         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5260 };
5261
5262 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5263 struct ibm_thermal_sensors_struct {
5264         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5265 };
5266
5267 static enum thermal_access_mode thermal_read_mode;
5268
5269 /* idx is zero-based */
5270 static int thermal_get_sensor(int idx, s32 *value)
5271 {
5272         int t;
5273         s8 tmp;
5274         char tmpi[5];
5275
5276         t = TP_EC_THERMAL_TMP0;
5277
5278         switch (thermal_read_mode) {
5279 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5280         case TPACPI_THERMAL_TPEC_16:
5281                 if (idx >= 8 && idx <= 15) {
5282                         t = TP_EC_THERMAL_TMP8;
5283                         idx -= 8;
5284                 }
5285                 /* fallthrough */
5286 #endif
5287         case TPACPI_THERMAL_TPEC_8:
5288                 if (idx <= 7) {
5289                         if (!acpi_ec_read(t + idx, &tmp))
5290                                 return -EIO;
5291                         *value = tmp * 1000;
5292                         return 0;
5293                 }
5294                 break;
5295
5296         case TPACPI_THERMAL_ACPI_UPDT:
5297                 if (idx <= 7) {
5298                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5299                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5300                                 return -EIO;
5301                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5302                                 return -EIO;
5303                         *value = (t - 2732) * 100;
5304                         return 0;
5305                 }
5306                 break;
5307
5308         case TPACPI_THERMAL_ACPI_TMP07:
5309                 if (idx <= 7) {
5310                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5311                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5312                                 return -EIO;
5313                         if (t > 127 || t < -127)
5314                                 t = TP_EC_THERMAL_TMP_NA;
5315                         *value = t * 1000;
5316                         return 0;
5317                 }
5318                 break;
5319
5320         case TPACPI_THERMAL_NONE:
5321         default:
5322                 return -ENOSYS;
5323         }
5324
5325         return -EINVAL;
5326 }
5327
5328 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5329 {
5330         int res, i;
5331         int n;
5332
5333         n = 8;
5334         i = 0;
5335
5336         if (!s)
5337                 return -EINVAL;
5338
5339         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5340                 n = 16;
5341
5342         for (i = 0 ; i < n; i++) {
5343                 res = thermal_get_sensor(i, &s->temp[i]);
5344                 if (res)
5345                         return res;
5346         }
5347
5348         return n;
5349 }
5350
5351 /* sysfs temp##_input -------------------------------------------------- */
5352
5353 static ssize_t thermal_temp_input_show(struct device *dev,
5354                            struct device_attribute *attr,
5355                            char *buf)
5356 {
5357         struct sensor_device_attribute *sensor_attr =
5358                                         to_sensor_dev_attr(attr);
5359         int idx = sensor_attr->index;
5360         s32 value;
5361         int res;
5362
5363         res = thermal_get_sensor(idx, &value);
5364         if (res)
5365                 return res;
5366         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5367                 return -ENXIO;
5368
5369         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5370 }
5371
5372 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5373          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5374                      thermal_temp_input_show, NULL, _idxB)
5375
5376 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5377         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5378         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5379         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5380         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5381         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5382         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5383         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5384         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5385         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5386         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5387         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5388         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5389         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5390         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5391         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5392         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5393 };
5394
5395 #define THERMAL_ATTRS(X) \
5396         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5397
5398 static struct attribute *thermal_temp_input_attr[] = {
5399         THERMAL_ATTRS(8),
5400         THERMAL_ATTRS(9),
5401         THERMAL_ATTRS(10),
5402         THERMAL_ATTRS(11),
5403         THERMAL_ATTRS(12),
5404         THERMAL_ATTRS(13),
5405         THERMAL_ATTRS(14),
5406         THERMAL_ATTRS(15),
5407         THERMAL_ATTRS(0),
5408         THERMAL_ATTRS(1),
5409         THERMAL_ATTRS(2),
5410         THERMAL_ATTRS(3),
5411         THERMAL_ATTRS(4),
5412         THERMAL_ATTRS(5),
5413         THERMAL_ATTRS(6),
5414         THERMAL_ATTRS(7),
5415         NULL
5416 };
5417
5418 static const struct attribute_group thermal_temp_input16_group = {
5419         .attrs = thermal_temp_input_attr
5420 };
5421
5422 static const struct attribute_group thermal_temp_input8_group = {
5423         .attrs = &thermal_temp_input_attr[8]
5424 };
5425
5426 #undef THERMAL_SENSOR_ATTR_TEMP
5427 #undef THERMAL_ATTRS
5428
5429 /* --------------------------------------------------------------------- */
5430
5431 static int __init thermal_init(struct ibm_init_struct *iibm)
5432 {
5433         u8 t, ta1, ta2;
5434         int i;
5435         int acpi_tmp7;
5436         int res;
5437
5438         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5439
5440         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5441
5442         if (thinkpad_id.ec_model) {
5443                 /*
5444                  * Direct EC access mode: sensors at registers
5445                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5446                  * non-implemented, thermal sensors return 0x80 when
5447                  * not available
5448                  */
5449
5450                 ta1 = ta2 = 0;
5451                 for (i = 0; i < 8; i++) {
5452                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5453                                 ta1 |= t;
5454                         } else {
5455                                 ta1 = 0;
5456                                 break;
5457                         }
5458                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5459                                 ta2 |= t;
5460                         } else {
5461                                 ta1 = 0;
5462                                 break;
5463                         }
5464                 }
5465                 if (ta1 == 0) {
5466                         /* This is sheer paranoia, but we handle it anyway */
5467                         if (acpi_tmp7) {
5468                                 printk(TPACPI_ERR
5469                                        "ThinkPad ACPI EC access misbehaving, "
5470                                        "falling back to ACPI TMPx access "
5471                                        "mode\n");
5472                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5473                         } else {
5474                                 printk(TPACPI_ERR
5475                                        "ThinkPad ACPI EC access misbehaving, "
5476                                        "disabling thermal sensors access\n");
5477                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5478                         }
5479                 } else {
5480                         thermal_read_mode =
5481                             (ta2 != 0) ?
5482                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5483                 }
5484         } else if (acpi_tmp7) {
5485                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5486                         /* 600e/x, 770e, 770x */
5487                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5488                 } else {
5489                         /* Standard ACPI TMPx access, max 8 sensors */
5490                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5491                 }
5492         } else {
5493                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5494                 thermal_read_mode = TPACPI_THERMAL_NONE;
5495         }
5496
5497         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5498                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5499                 thermal_read_mode);
5500
5501         switch (thermal_read_mode) {
5502         case TPACPI_THERMAL_TPEC_16:
5503                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5504                                 &thermal_temp_input16_group);
5505                 if (res)
5506                         return res;
5507                 break;
5508         case TPACPI_THERMAL_TPEC_8:
5509         case TPACPI_THERMAL_ACPI_TMP07:
5510         case TPACPI_THERMAL_ACPI_UPDT:
5511                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5512                                 &thermal_temp_input8_group);
5513                 if (res)
5514                         return res;
5515                 break;
5516         case TPACPI_THERMAL_NONE:
5517         default:
5518                 return 1;
5519         }
5520
5521         return 0;
5522 }
5523
5524 static void thermal_exit(void)
5525 {
5526         switch (thermal_read_mode) {
5527         case TPACPI_THERMAL_TPEC_16:
5528                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5529                                    &thermal_temp_input16_group);
5530                 break;
5531         case TPACPI_THERMAL_TPEC_8:
5532         case TPACPI_THERMAL_ACPI_TMP07:
5533         case TPACPI_THERMAL_ACPI_UPDT:
5534                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5535                                    &thermal_temp_input16_group);
5536                 break;
5537         case TPACPI_THERMAL_NONE:
5538         default:
5539                 break;
5540         }
5541 }
5542
5543 static int thermal_read(char *p)
5544 {
5545         int len = 0;
5546         int n, i;
5547         struct ibm_thermal_sensors_struct t;
5548
5549         n = thermal_get_sensors(&t);
5550         if (unlikely(n < 0))
5551                 return n;
5552
5553         len += sprintf(p + len, "temperatures:\t");
5554
5555         if (n > 0) {
5556                 for (i = 0; i < (n - 1); i++)
5557                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5558                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5559         } else
5560                 len += sprintf(p + len, "not supported\n");
5561
5562         return len;
5563 }
5564
5565 static struct ibm_struct thermal_driver_data = {
5566         .name = "thermal",
5567         .read = thermal_read,
5568         .exit = thermal_exit,
5569 };
5570
5571 /*************************************************************************
5572  * EC Dump subdriver
5573  */
5574
5575 static u8 ecdump_regs[256];
5576
5577 static int ecdump_read(char *p)
5578 {
5579         int len = 0;
5580         int i, j;
5581         u8 v;
5582
5583         len += sprintf(p + len, "EC      "
5584                        " +00 +01 +02 +03 +04 +05 +06 +07"
5585                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5586         for (i = 0; i < 256; i += 16) {
5587                 len += sprintf(p + len, "EC 0x%02x:", i);
5588                 for (j = 0; j < 16; j++) {
5589                         if (!acpi_ec_read(i + j, &v))
5590                                 break;
5591                         if (v != ecdump_regs[i + j])
5592                                 len += sprintf(p + len, " *%02x", v);
5593                         else
5594                                 len += sprintf(p + len, "  %02x", v);
5595                         ecdump_regs[i + j] = v;
5596                 }
5597                 len += sprintf(p + len, "\n");
5598                 if (j != 16)
5599                         break;
5600         }
5601
5602         /* These are way too dangerous to advertise openly... */
5603 #if 0
5604         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5605                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5606         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5607                        " (<offset> is 00-ff, <value> is 0-255)\n");
5608 #endif
5609         return len;
5610 }
5611
5612 static int ecdump_write(char *buf)
5613 {
5614         char *cmd;
5615         int i, v;
5616
5617         while ((cmd = next_cmd(&buf))) {
5618                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5619                         /* i and v set */
5620                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5621                         /* i and v set */
5622                 } else
5623                         return -EINVAL;
5624                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5625                         if (!acpi_ec_write(i, v))
5626                                 return -EIO;
5627                 } else
5628                         return -EINVAL;
5629         }
5630
5631         return 0;
5632 }
5633
5634 static struct ibm_struct ecdump_driver_data = {
5635         .name = "ecdump",
5636         .read = ecdump_read,
5637         .write = ecdump_write,
5638         .flags.experimental = 1,
5639 };
5640
5641 /*************************************************************************
5642  * Backlight/brightness subdriver
5643  */
5644
5645 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5646
5647 /*
5648  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5649  * CMOS NVRAM byte 0x5E, bits 0-3.
5650  *
5651  * EC HBRV (0x31) has the following layout
5652  *   Bit 7: unknown function
5653  *   Bit 6: unknown function
5654  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5655  *   Bit 4: must be set to zero to avoid problems
5656  *   Bit 3-0: backlight brightness level
5657  *
5658  * brightness_get_raw returns status data in the HBRV layout
5659  *
5660  * WARNING: The X61 has been verified to use HBRV for something else, so
5661  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5662  * testing on the very early *60 Lenovo models...
5663  */
5664
5665 enum {
5666         TP_EC_BACKLIGHT = 0x31,
5667
5668         /* TP_EC_BACKLIGHT bitmasks */
5669         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5670         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5671         TP_EC_BACKLIGHT_MAPSW = 0x20,
5672 };
5673
5674 enum tpacpi_brightness_access_mode {
5675         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5676         TPACPI_BRGHT_MODE_EC,           /* EC control */
5677         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5678         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5679         TPACPI_BRGHT_MODE_MAX
5680 };
5681
5682 static struct backlight_device *ibm_backlight_device;
5683
5684 static enum tpacpi_brightness_access_mode brightness_mode =
5685                 TPACPI_BRGHT_MODE_MAX;
5686
5687 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5688
5689 static struct mutex brightness_mutex;
5690
5691 /* NVRAM brightness access,
5692  * call with brightness_mutex held! */
5693 static unsigned int tpacpi_brightness_nvram_get(void)
5694 {
5695         u8 lnvram;
5696
5697         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5698                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5699                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5700         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5701
5702         return lnvram;
5703 }
5704
5705 static void tpacpi_brightness_checkpoint_nvram(void)
5706 {
5707         u8 lec = 0;
5708         u8 b_nvram;
5709
5710         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5711                 return;
5712
5713         vdbg_printk(TPACPI_DBG_BRGHT,
5714                 "trying to checkpoint backlight level to NVRAM...\n");
5715
5716         if (mutex_lock_killable(&brightness_mutex) < 0)
5717                 return;
5718
5719         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5720                 goto unlock;
5721         lec &= TP_EC_BACKLIGHT_LVLMSK;
5722         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5723
5724         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5725                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5726                 /* NVRAM needs update */
5727                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5728                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5729                 b_nvram |= lec;
5730                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5731                 dbg_printk(TPACPI_DBG_BRGHT,
5732                            "updated NVRAM backlight level to %u (0x%02x)\n",
5733                            (unsigned int) lec, (unsigned int) b_nvram);
5734         } else
5735                 vdbg_printk(TPACPI_DBG_BRGHT,
5736                            "NVRAM backlight level already is %u (0x%02x)\n",
5737                            (unsigned int) lec, (unsigned int) b_nvram);
5738
5739 unlock:
5740         mutex_unlock(&brightness_mutex);
5741 }
5742
5743
5744 /* call with brightness_mutex held! */
5745 static int tpacpi_brightness_get_raw(int *status)
5746 {
5747         u8 lec = 0;
5748
5749         switch (brightness_mode) {
5750         case TPACPI_BRGHT_MODE_UCMS_STEP:
5751                 *status = tpacpi_brightness_nvram_get();
5752                 return 0;
5753         case TPACPI_BRGHT_MODE_EC:
5754         case TPACPI_BRGHT_MODE_ECNVRAM:
5755                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5756                         return -EIO;
5757                 *status = lec;
5758                 return 0;
5759         default:
5760                 return -ENXIO;
5761         }
5762 }
5763
5764 /* call with brightness_mutex held! */
5765 /* do NOT call with illegal backlight level value */
5766 static int tpacpi_brightness_set_ec(unsigned int value)
5767 {
5768         u8 lec = 0;
5769
5770         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5771                 return -EIO;
5772
5773         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5774                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5775                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5776                 return -EIO;
5777
5778         return 0;
5779 }
5780
5781 /* call with brightness_mutex held! */
5782 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5783 {
5784         int cmos_cmd, inc;
5785         unsigned int current_value, i;
5786
5787         current_value = tpacpi_brightness_nvram_get();
5788
5789         if (value == current_value)
5790                 return 0;
5791
5792         cmos_cmd = (value > current_value) ?
5793                         TP_CMOS_BRIGHTNESS_UP :
5794                         TP_CMOS_BRIGHTNESS_DOWN;
5795         inc = (value > current_value) ? 1 : -1;
5796
5797         for (i = current_value; i != value; i += inc)
5798                 if (issue_thinkpad_cmos_command(cmos_cmd))
5799                         return -EIO;
5800
5801         return 0;
5802 }
5803
5804 /* May return EINTR which can always be mapped to ERESTARTSYS */
5805 static int brightness_set(unsigned int value)
5806 {
5807         int res;
5808
5809         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5810             value < 0)
5811                 return -EINVAL;
5812
5813         vdbg_printk(TPACPI_DBG_BRGHT,
5814                         "set backlight level to %d\n", value);
5815
5816         res = mutex_lock_killable(&brightness_mutex);
5817         if (res < 0)
5818                 return res;
5819
5820         switch (brightness_mode) {
5821         case TPACPI_BRGHT_MODE_EC:
5822         case TPACPI_BRGHT_MODE_ECNVRAM:
5823                 res = tpacpi_brightness_set_ec(value);
5824                 break;
5825         case TPACPI_BRGHT_MODE_UCMS_STEP:
5826                 res = tpacpi_brightness_set_ucmsstep(value);
5827                 break;
5828         default:
5829                 res = -ENXIO;
5830         }
5831
5832         mutex_unlock(&brightness_mutex);
5833         return res;
5834 }
5835
5836 /* sysfs backlight class ----------------------------------------------- */
5837
5838 static int brightness_update_status(struct backlight_device *bd)
5839 {
5840         unsigned int level =
5841                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5842                  bd->props.power == FB_BLANK_UNBLANK) ?
5843                                 bd->props.brightness : 0;
5844
5845         dbg_printk(TPACPI_DBG_BRGHT,
5846                         "backlight: attempt to set level to %d\n",
5847                         level);
5848
5849         /* it is the backlight class's job (caller) to handle
5850          * EINTR and other errors properly */
5851         return brightness_set(level);
5852 }
5853
5854 static int brightness_get(struct backlight_device *bd)
5855 {
5856         int status, res;
5857
5858         res = mutex_lock_killable(&brightness_mutex);
5859         if (res < 0)
5860                 return 0;
5861
5862         res = tpacpi_brightness_get_raw(&status);
5863
5864         mutex_unlock(&brightness_mutex);
5865
5866         if (res < 0)
5867                 return 0;
5868
5869         return status & TP_EC_BACKLIGHT_LVLMSK;
5870 }
5871
5872 static struct backlight_ops ibm_backlight_data = {
5873         .get_brightness = brightness_get,
5874         .update_status  = brightness_update_status,
5875 };
5876
5877 /* --------------------------------------------------------------------- */
5878
5879 /*
5880  * These are only useful for models that have only one possibility
5881  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5882  * these quirks.
5883  */
5884 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5885 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5886 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5887
5888 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5889         /* Models with ATI GPUs known to require ECNVRAM mode */
5890         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5891
5892         /* Models with ATI GPUs that can use ECNVRAM */
5893         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5894         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5895         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5896         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5897
5898         /* Models with Intel Extreme Graphics 2 */
5899         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5900         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5901         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5902
5903         /* Models with Intel GMA900 */
5904         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5905         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5906         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5907 };
5908
5909 static int __init brightness_init(struct ibm_init_struct *iibm)
5910 {
5911         int b;
5912         unsigned long quirks;
5913
5914         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5915
5916         mutex_init(&brightness_mutex);
5917
5918         quirks = tpacpi_check_quirks(brightness_quirk_table,
5919                                 ARRAY_SIZE(brightness_quirk_table));
5920
5921         /*
5922          * We always attempt to detect acpi support, so as to switch
5923          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5924          * going to publish a backlight interface
5925          */
5926         b = tpacpi_check_std_acpi_brightness_support();
5927         if (b > 0) {
5928
5929                 if (acpi_video_backlight_support()) {
5930                         if (brightness_enable > 1) {
5931                                 printk(TPACPI_NOTICE
5932                                        "Standard ACPI backlight interface "
5933                                        "available, not loading native one.\n");
5934                                 return 1;
5935                         } else if (brightness_enable == 1) {
5936                                 printk(TPACPI_NOTICE
5937                                        "Backlight control force enabled, even if standard "
5938                                        "ACPI backlight interface is available\n");
5939                         }
5940                 } else {
5941                         if (brightness_enable > 1) {
5942                                 printk(TPACPI_NOTICE
5943                                        "Standard ACPI backlight interface not "
5944                                        "available, thinkpad_acpi native "
5945                                        "brightness control enabled\n");
5946                         }
5947                 }
5948         }
5949
5950         if (!brightness_enable) {
5951                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5952                            "brightness support disabled by "
5953                            "module parameter\n");
5954                 return 1;
5955         }
5956
5957         if (b > 16) {
5958                 printk(TPACPI_ERR
5959                        "Unsupported brightness interface, "
5960                        "please contact %s\n", TPACPI_MAIL);
5961                 return 1;
5962         }
5963         if (b == 16)
5964                 tp_features.bright_16levels = 1;
5965
5966         /*
5967          * Check for module parameter bogosity, note that we
5968          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5969          * able to detect "unspecified"
5970          */
5971         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5972                 return -EINVAL;
5973
5974         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5975         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5976             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5977                 if (quirks & TPACPI_BRGHT_Q_EC)
5978                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5979                 else
5980                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5981
5982                 dbg_printk(TPACPI_DBG_BRGHT,
5983                            "driver auto-selected brightness_mode=%d\n",
5984                            brightness_mode);
5985         }
5986
5987         /* Safety */
5988         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5989             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5990              brightness_mode == TPACPI_BRGHT_MODE_EC))
5991                 return -EINVAL;
5992
5993         if (tpacpi_brightness_get_raw(&b) < 0)
5994                 return 1;
5995
5996         if (tp_features.bright_16levels)
5997                 printk(TPACPI_INFO
5998                        "detected a 16-level brightness capable ThinkPad\n");
5999
6000         ibm_backlight_device = backlight_device_register(
6001                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6002                                         &ibm_backlight_data);
6003         if (IS_ERR(ibm_backlight_device)) {
6004                 printk(TPACPI_ERR "Could not register backlight device\n");
6005                 return PTR_ERR(ibm_backlight_device);
6006         }
6007         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6008                         "brightness is supported\n");
6009
6010         if (quirks & TPACPI_BRGHT_Q_ASK) {
6011                 printk(TPACPI_NOTICE
6012                         "brightness: will use unverified default: "
6013                         "brightness_mode=%d\n", brightness_mode);
6014                 printk(TPACPI_NOTICE
6015                         "brightness: please report to %s whether it works well "
6016                         "or not on your ThinkPad\n", TPACPI_MAIL);
6017         }
6018
6019         ibm_backlight_device->props.max_brightness =
6020                                 (tp_features.bright_16levels)? 15 : 7;
6021         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6022         backlight_update_status(ibm_backlight_device);
6023
6024         return 0;
6025 }
6026
6027 static void brightness_suspend(pm_message_t state)
6028 {
6029         tpacpi_brightness_checkpoint_nvram();
6030 }
6031
6032 static void brightness_shutdown(void)
6033 {
6034         tpacpi_brightness_checkpoint_nvram();
6035 }
6036
6037 static void brightness_exit(void)
6038 {
6039         if (ibm_backlight_device) {
6040                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6041                             "calling backlight_device_unregister()\n");
6042                 backlight_device_unregister(ibm_backlight_device);
6043         }
6044
6045         tpacpi_brightness_checkpoint_nvram();
6046 }
6047
6048 static int brightness_read(char *p)
6049 {
6050         int len = 0;
6051         int level;
6052
6053         level = brightness_get(NULL);
6054         if (level < 0) {
6055                 len += sprintf(p + len, "level:\t\tunreadable\n");
6056         } else {
6057                 len += sprintf(p + len, "level:\t\t%d\n", level);
6058                 len += sprintf(p + len, "commands:\tup, down\n");
6059                 len += sprintf(p + len, "commands:\tlevel <level>"
6060                                " (<level> is 0-%d)\n",
6061                                (tp_features.bright_16levels) ? 15 : 7);
6062         }
6063
6064         return len;
6065 }
6066
6067 static int brightness_write(char *buf)
6068 {
6069         int level;
6070         int rc;
6071         char *cmd;
6072         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6073
6074         level = brightness_get(NULL);
6075         if (level < 0)
6076                 return level;
6077
6078         while ((cmd = next_cmd(&buf))) {
6079                 if (strlencmp(cmd, "up") == 0) {
6080                         if (level < max_level)
6081                                 level++;
6082                 } else if (strlencmp(cmd, "down") == 0) {
6083                         if (level > 0)
6084                                 level--;
6085                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6086                            level >= 0 && level <= max_level) {
6087                         /* new level set */
6088                 } else
6089                         return -EINVAL;
6090         }
6091
6092         tpacpi_disclose_usertask("procfs brightness",
6093                         "set level to %d\n", level);
6094
6095         /*
6096          * Now we know what the final level should be, so we try to set it.
6097          * Doing it this way makes the syscall restartable in case of EINTR
6098          */
6099         rc = brightness_set(level);
6100         return (rc == -EINTR)? ERESTARTSYS : rc;
6101 }
6102
6103 static struct ibm_struct brightness_driver_data = {
6104         .name = "brightness",
6105         .read = brightness_read,
6106         .write = brightness_write,
6107         .exit = brightness_exit,
6108         .suspend = brightness_suspend,
6109         .shutdown = brightness_shutdown,
6110 };
6111
6112 /*************************************************************************
6113  * Volume subdriver
6114  */
6115
6116 static int volume_offset = 0x30;
6117
6118 static int volume_read(char *p)
6119 {
6120         int len = 0;
6121         u8 level;
6122
6123         if (!acpi_ec_read(volume_offset, &level)) {
6124                 len += sprintf(p + len, "level:\t\tunreadable\n");
6125         } else {
6126                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6127                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6128                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6129                 len += sprintf(p + len, "commands:\tlevel <level>"
6130                                " (<level> is 0-15)\n");
6131         }
6132
6133         return len;
6134 }
6135
6136 static int volume_write(char *buf)
6137 {
6138         int cmos_cmd, inc, i;
6139         u8 level, mute;
6140         int new_level, new_mute;
6141         char *cmd;
6142
6143         while ((cmd = next_cmd(&buf))) {
6144                 if (!acpi_ec_read(volume_offset, &level))
6145                         return -EIO;
6146                 new_mute = mute = level & 0x40;
6147                 new_level = level = level & 0xf;
6148
6149                 if (strlencmp(cmd, "up") == 0) {
6150                         if (mute)
6151                                 new_mute = 0;
6152                         else
6153                                 new_level = level == 15 ? 15 : level + 1;
6154                 } else if (strlencmp(cmd, "down") == 0) {
6155                         if (mute)
6156                                 new_mute = 0;
6157                         else
6158                                 new_level = level == 0 ? 0 : level - 1;
6159                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6160                            new_level >= 0 && new_level <= 15) {
6161                         /* new_level set */
6162                 } else if (strlencmp(cmd, "mute") == 0) {
6163                         new_mute = 0x40;
6164                 } else
6165                         return -EINVAL;
6166
6167                 if (new_level != level) {
6168                         /* mute doesn't change */
6169
6170                         cmos_cmd = (new_level > level) ?
6171                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6172                         inc = new_level > level ? 1 : -1;
6173
6174                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6175                                      !acpi_ec_write(volume_offset, level)))
6176                                 return -EIO;
6177
6178                         for (i = level; i != new_level; i += inc)
6179                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6180                                     !acpi_ec_write(volume_offset, i + inc))
6181                                         return -EIO;
6182
6183                         if (mute &&
6184                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6185                              !acpi_ec_write(volume_offset, new_level + mute))) {
6186                                 return -EIO;
6187                         }
6188                 }
6189
6190                 if (new_mute != mute) {
6191                         /* level doesn't change */
6192
6193                         cmos_cmd = (new_mute) ?
6194                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6195
6196                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6197                             !acpi_ec_write(volume_offset, level + new_mute))
6198                                 return -EIO;
6199                 }
6200         }
6201
6202         return 0;
6203 }
6204
6205 static struct ibm_struct volume_driver_data = {
6206         .name = "volume",
6207         .read = volume_read,
6208         .write = volume_write,
6209 };
6210
6211 /*************************************************************************
6212  * Fan subdriver
6213  */
6214
6215 /*
6216  * FAN ACCESS MODES
6217  *
6218  * TPACPI_FAN_RD_ACPI_GFAN:
6219  *      ACPI GFAN method: returns fan level
6220  *
6221  *      see TPACPI_FAN_WR_ACPI_SFAN
6222  *      EC 0x2f (HFSP) not available if GFAN exists
6223  *
6224  * TPACPI_FAN_WR_ACPI_SFAN:
6225  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6226  *
6227  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6228  *      it for writing.
6229  *
6230  * TPACPI_FAN_WR_TPEC:
6231  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6232  *      Supported on almost all ThinkPads
6233  *
6234  *      Fan speed changes of any sort (including those caused by the
6235  *      disengaged mode) are usually done slowly by the firmware as the
6236  *      maximum ammount of fan duty cycle change per second seems to be
6237  *      limited.
6238  *
6239  *      Reading is not available if GFAN exists.
6240  *      Writing is not available if SFAN exists.
6241  *
6242  *      Bits
6243  *       7      automatic mode engaged;
6244  *              (default operation mode of the ThinkPad)
6245  *              fan level is ignored in this mode.
6246  *       6      full speed mode (takes precedence over bit 7);
6247  *              not available on all thinkpads.  May disable
6248  *              the tachometer while the fan controller ramps up
6249  *              the speed (which can take up to a few *minutes*).
6250  *              Speeds up fan to 100% duty-cycle, which is far above
6251  *              the standard RPM levels.  It is not impossible that
6252  *              it could cause hardware damage.
6253  *      5-3     unused in some models.  Extra bits for fan level
6254  *              in others, but still useless as all values above
6255  *              7 map to the same speed as level 7 in these models.
6256  *      2-0     fan level (0..7 usually)
6257  *                      0x00 = stop
6258  *                      0x07 = max (set when temperatures critical)
6259  *              Some ThinkPads may have other levels, see
6260  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6261  *
6262  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6263  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6264  *      does so, its initial value is meaningless (0x07).
6265  *
6266  *      For firmware bugs, refer to:
6267  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6268  *
6269  *      ----
6270  *
6271  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6272  *      Main fan tachometer reading (in RPM)
6273  *
6274  *      This register is present on all ThinkPads with a new-style EC, and
6275  *      it is known not to be present on the A21m/e, and T22, as there is
6276  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6277  *      ThinkPads from this same time period (and earlier) probably lack the
6278  *      tachometer as well.
6279  *
6280  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6281  *      was never fixed by IBM to report the EC firmware version string
6282  *      probably support the tachometer (like the early X models), so
6283  *      detecting it is quite hard.  We need more data to know for sure.
6284  *
6285  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6286  *      might result.
6287  *
6288  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6289  *      mode.
6290  *
6291  *      For firmware bugs, refer to:
6292  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6293  *
6294  *      ----
6295  *
6296  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6297  *
6298  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6299  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6300  *      is one, the tachometer registers show the speed of the auxiliary
6301  *      fan.
6302  *
6303  *      Fan control seems to affect both fans, regardless of the state
6304  *      of this bit.
6305  *
6306  *      So far, only the firmware for the X60/X61 non-tablet versions
6307  *      seem to support this (firmware TP-7M).
6308  *
6309  * TPACPI_FAN_WR_ACPI_FANS:
6310  *      ThinkPad X31, X40, X41.  Not available in the X60.
6311  *
6312  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6313  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6314  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6315  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6316  *
6317  *      The speeds are stored on handles
6318  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6319  *
6320  *      There are three default speed sets, acessible as handles:
6321  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6322  *
6323  *      ACPI DSDT switches which set is in use depending on various
6324  *      factors.
6325  *
6326  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6327  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6328  *      but the ACPI tables just mention level 7.
6329  */
6330
6331 enum {                                  /* Fan control constants */
6332         fan_status_offset = 0x2f,       /* EC register 0x2f */
6333         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6334                                          * 0x84 must be read before 0x85 */
6335         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6336                                            bit 0 selects which fan is active */
6337
6338         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6339         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6340
6341         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6342 };
6343
6344 enum fan_status_access_mode {
6345         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6346         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6347         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6348 };
6349
6350 enum fan_control_access_mode {
6351         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6352         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6353         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6354         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6355 };
6356
6357 enum fan_control_commands {
6358         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6359         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6360         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6361                                                  * and also watchdog cmd */
6362 };
6363
6364 static int fan_control_allowed;
6365
6366 static enum fan_status_access_mode fan_status_access_mode;
6367 static enum fan_control_access_mode fan_control_access_mode;
6368 static enum fan_control_commands fan_control_commands;
6369
6370 static u8 fan_control_initial_status;
6371 static u8 fan_control_desired_level;
6372 static u8 fan_control_resume_level;
6373 static int fan_watchdog_maxinterval;
6374
6375 static struct mutex fan_mutex;
6376
6377 static void fan_watchdog_fire(struct work_struct *ignored);
6378 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6379
6380 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6381 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6382            "\\FSPD",            /* 600e/x, 770e, 770x */
6383            );                   /* all others */
6384 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6385            "JFNS",              /* 770x-JL */
6386            );                   /* all others */
6387
6388 /*
6389  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6390  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6391  * be in auto mode (0x80).
6392  *
6393  * This is corrected by any write to HFSP either by the driver, or
6394  * by the firmware.
6395  *
6396  * We assume 0x07 really means auto mode while this quirk is active,
6397  * as this is far more likely than the ThinkPad being in level 7,
6398  * which is only used by the firmware during thermal emergencies.
6399  *
6400  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6401  * TP-70 (T43, R52), which are known to be buggy.
6402  */
6403
6404 static void fan_quirk1_setup(void)
6405 {
6406         if (fan_control_initial_status == 0x07) {
6407                 printk(TPACPI_NOTICE
6408                        "fan_init: initial fan status is unknown, "
6409                        "assuming it is in auto mode\n");
6410                 tp_features.fan_ctrl_status_undef = 1;
6411         }
6412 }
6413
6414 static void fan_quirk1_handle(u8 *fan_status)
6415 {
6416         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6417                 if (*fan_status != fan_control_initial_status) {
6418                         /* something changed the HFSP regisnter since
6419                          * driver init time, so it is not undefined
6420                          * anymore */
6421                         tp_features.fan_ctrl_status_undef = 0;
6422                 } else {
6423                         /* Return most likely status. In fact, it
6424                          * might be the only possible status */
6425                         *fan_status = TP_EC_FAN_AUTO;
6426                 }
6427         }
6428 }
6429
6430 /* Select main fan on X60/X61, NOOP on others */
6431 static bool fan_select_fan1(void)
6432 {
6433         if (tp_features.second_fan) {
6434                 u8 val;
6435
6436                 if (ec_read(fan_select_offset, &val) < 0)
6437                         return false;
6438                 val &= 0xFEU;
6439                 if (ec_write(fan_select_offset, val) < 0)
6440                         return false;
6441         }
6442         return true;
6443 }
6444
6445 /* Select secondary fan on X60/X61 */
6446 static bool fan_select_fan2(void)
6447 {
6448         u8 val;
6449
6450         if (!tp_features.second_fan)
6451                 return false;
6452
6453         if (ec_read(fan_select_offset, &val) < 0)
6454                 return false;
6455         val |= 0x01U;
6456         if (ec_write(fan_select_offset, val) < 0)
6457                 return false;
6458
6459         return true;
6460 }
6461
6462 /*
6463  * Call with fan_mutex held
6464  */
6465 static void fan_update_desired_level(u8 status)
6466 {
6467         if ((status &
6468              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6469                 if (status > 7)
6470                         fan_control_desired_level = 7;
6471                 else
6472                         fan_control_desired_level = status;
6473         }
6474 }
6475
6476 static int fan_get_status(u8 *status)
6477 {
6478         u8 s;
6479
6480         /* TODO:
6481          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6482
6483         switch (fan_status_access_mode) {
6484         case TPACPI_FAN_RD_ACPI_GFAN:
6485                 /* 570, 600e/x, 770e, 770x */
6486
6487                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6488                         return -EIO;
6489
6490                 if (likely(status))
6491                         *status = s & 0x07;
6492
6493                 break;
6494
6495         case TPACPI_FAN_RD_TPEC:
6496                 /* all except 570, 600e/x, 770e, 770x */
6497                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6498                         return -EIO;
6499
6500                 if (likely(status)) {
6501                         *status = s;
6502                         fan_quirk1_handle(status);
6503                 }
6504
6505                 break;
6506
6507         default:
6508                 return -ENXIO;
6509         }
6510
6511         return 0;
6512 }
6513
6514 static int fan_get_status_safe(u8 *status)
6515 {
6516         int rc;
6517         u8 s;
6518
6519         if (mutex_lock_killable(&fan_mutex))
6520                 return -ERESTARTSYS;
6521         rc = fan_get_status(&s);
6522         if (!rc)
6523                 fan_update_desired_level(s);
6524         mutex_unlock(&fan_mutex);
6525
6526         if (status)
6527                 *status = s;
6528
6529         return rc;
6530 }
6531
6532 static int fan_get_speed(unsigned int *speed)
6533 {
6534         u8 hi, lo;
6535
6536         switch (fan_status_access_mode) {
6537         case TPACPI_FAN_RD_TPEC:
6538                 /* all except 570, 600e/x, 770e, 770x */
6539                 if (unlikely(!fan_select_fan1()))
6540                         return -EIO;
6541                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6542                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6543                         return -EIO;
6544
6545                 if (likely(speed))
6546                         *speed = (hi << 8) | lo;
6547
6548                 break;
6549
6550         default:
6551                 return -ENXIO;
6552         }
6553
6554         return 0;
6555 }
6556
6557 static int fan2_get_speed(unsigned int *speed)
6558 {
6559         u8 hi, lo;
6560         bool rc;
6561
6562         switch (fan_status_access_mode) {
6563         case TPACPI_FAN_RD_TPEC:
6564                 /* all except 570, 600e/x, 770e, 770x */
6565                 if (unlikely(!fan_select_fan2()))
6566                         return -EIO;
6567                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6568                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6569                 fan_select_fan1(); /* play it safe */
6570                 if (rc)
6571                         return -EIO;
6572
6573                 if (likely(speed))
6574                         *speed = (hi << 8) | lo;
6575
6576                 break;
6577
6578         default:
6579                 return -ENXIO;
6580         }
6581
6582         return 0;
6583 }
6584
6585 static int fan_set_level(int level)
6586 {
6587         if (!fan_control_allowed)
6588                 return -EPERM;
6589
6590         switch (fan_control_access_mode) {
6591         case TPACPI_FAN_WR_ACPI_SFAN:
6592                 if (level >= 0 && level <= 7) {
6593                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6594                                 return -EIO;
6595                 } else
6596                         return -EINVAL;
6597                 break;
6598
6599         case TPACPI_FAN_WR_ACPI_FANS:
6600         case TPACPI_FAN_WR_TPEC:
6601                 if (!(level & TP_EC_FAN_AUTO) &&
6602                     !(level & TP_EC_FAN_FULLSPEED) &&
6603                     ((level < 0) || (level > 7)))
6604                         return -EINVAL;
6605
6606                 /* safety net should the EC not support AUTO
6607                  * or FULLSPEED mode bits and just ignore them */
6608                 if (level & TP_EC_FAN_FULLSPEED)
6609                         level |= 7;     /* safety min speed 7 */
6610                 else if (level & TP_EC_FAN_AUTO)
6611                         level |= 4;     /* safety min speed 4 */
6612
6613                 if (!acpi_ec_write(fan_status_offset, level))
6614                         return -EIO;
6615                 else
6616                         tp_features.fan_ctrl_status_undef = 0;
6617                 break;
6618
6619         default:
6620                 return -ENXIO;
6621         }
6622
6623         vdbg_printk(TPACPI_DBG_FAN,
6624                 "fan control: set fan control register to 0x%02x\n", level);
6625         return 0;
6626 }
6627
6628 static int fan_set_level_safe(int level)
6629 {
6630         int rc;
6631
6632         if (!fan_control_allowed)
6633                 return -EPERM;
6634
6635         if (mutex_lock_killable(&fan_mutex))
6636                 return -ERESTARTSYS;
6637
6638         if (level == TPACPI_FAN_LAST_LEVEL)
6639                 level = fan_control_desired_level;
6640
6641         rc = fan_set_level(level);
6642         if (!rc)
6643                 fan_update_desired_level(level);
6644
6645         mutex_unlock(&fan_mutex);
6646         return rc;
6647 }
6648
6649 static int fan_set_enable(void)
6650 {
6651         u8 s;
6652         int rc;
6653
6654         if (!fan_control_allowed)
6655                 return -EPERM;
6656
6657         if (mutex_lock_killable(&fan_mutex))
6658                 return -ERESTARTSYS;
6659
6660         switch (fan_control_access_mode) {
6661         case TPACPI_FAN_WR_ACPI_FANS:
6662         case TPACPI_FAN_WR_TPEC:
6663                 rc = fan_get_status(&s);
6664                 if (rc < 0)
6665                         break;
6666
6667                 /* Don't go out of emergency fan mode */
6668                 if (s != 7) {
6669                         s &= 0x07;
6670                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6671                 }
6672
6673                 if (!acpi_ec_write(fan_status_offset, s))
6674                         rc = -EIO;
6675                 else {
6676                         tp_features.fan_ctrl_status_undef = 0;
6677                         rc = 0;
6678                 }
6679                 break;
6680
6681         case TPACPI_FAN_WR_ACPI_SFAN:
6682                 rc = fan_get_status(&s);
6683                 if (rc < 0)
6684                         break;
6685
6686                 s &= 0x07;
6687
6688                 /* Set fan to at least level 4 */
6689                 s |= 4;
6690
6691                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6692                         rc = -EIO;
6693                 else
6694                         rc = 0;
6695                 break;
6696
6697         default:
6698                 rc = -ENXIO;
6699         }
6700
6701         mutex_unlock(&fan_mutex);
6702
6703         if (!rc)
6704                 vdbg_printk(TPACPI_DBG_FAN,
6705                         "fan control: set fan control register to 0x%02x\n",
6706                         s);
6707         return rc;
6708 }
6709
6710 static int fan_set_disable(void)
6711 {
6712         int rc;
6713
6714         if (!fan_control_allowed)
6715                 return -EPERM;
6716
6717         if (mutex_lock_killable(&fan_mutex))
6718                 return -ERESTARTSYS;
6719
6720         rc = 0;
6721         switch (fan_control_access_mode) {
6722         case TPACPI_FAN_WR_ACPI_FANS:
6723         case TPACPI_FAN_WR_TPEC:
6724                 if (!acpi_ec_write(fan_status_offset, 0x00))
6725                         rc = -EIO;
6726                 else {
6727                         fan_control_desired_level = 0;
6728                         tp_features.fan_ctrl_status_undef = 0;
6729                 }
6730                 break;
6731
6732         case TPACPI_FAN_WR_ACPI_SFAN:
6733                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6734                         rc = -EIO;
6735                 else
6736                         fan_control_desired_level = 0;
6737                 break;
6738
6739         default:
6740                 rc = -ENXIO;
6741         }
6742
6743         if (!rc)
6744                 vdbg_printk(TPACPI_DBG_FAN,
6745                         "fan control: set fan control register to 0\n");
6746
6747         mutex_unlock(&fan_mutex);
6748         return rc;
6749 }
6750
6751 static int fan_set_speed(int speed)
6752 {
6753         int rc;
6754
6755         if (!fan_control_allowed)
6756                 return -EPERM;
6757
6758         if (mutex_lock_killable(&fan_mutex))
6759                 return -ERESTARTSYS;
6760
6761         rc = 0;
6762         switch (fan_control_access_mode) {
6763         case TPACPI_FAN_WR_ACPI_FANS:
6764                 if (speed >= 0 && speed <= 65535) {
6765                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6766                                         speed, speed, speed))
6767                                 rc = -EIO;
6768                 } else
6769                         rc = -EINVAL;
6770                 break;
6771
6772         default:
6773                 rc = -ENXIO;
6774         }
6775
6776         mutex_unlock(&fan_mutex);
6777         return rc;
6778 }
6779
6780 static void fan_watchdog_reset(void)
6781 {
6782         static int fan_watchdog_active;
6783
6784         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6785                 return;
6786
6787         if (fan_watchdog_active)
6788                 cancel_delayed_work(&fan_watchdog_task);
6789
6790         if (fan_watchdog_maxinterval > 0 &&
6791             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6792                 fan_watchdog_active = 1;
6793                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6794                                 msecs_to_jiffies(fan_watchdog_maxinterval
6795                                                  * 1000))) {
6796                         printk(TPACPI_ERR
6797                                "failed to queue the fan watchdog, "
6798                                "watchdog will not trigger\n");
6799                 }
6800         } else
6801                 fan_watchdog_active = 0;
6802 }
6803
6804 static void fan_watchdog_fire(struct work_struct *ignored)
6805 {
6806         int rc;
6807
6808         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6809                 return;
6810
6811         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6812         rc = fan_set_enable();
6813         if (rc < 0) {
6814                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6815                         "will try again later...\n", -rc);
6816                 /* reschedule for later */
6817                 fan_watchdog_reset();
6818         }
6819 }
6820
6821 /*
6822  * SYSFS fan layout: hwmon compatible (device)
6823  *
6824  * pwm*_enable:
6825  *      0: "disengaged" mode
6826  *      1: manual mode
6827  *      2: native EC "auto" mode (recommended, hardware default)
6828  *
6829  * pwm*: set speed in manual mode, ignored otherwise.
6830  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6831  *      interpolation.
6832  *
6833  * fan*_input: tachometer reading, RPM
6834  *
6835  *
6836  * SYSFS fan layout: extensions
6837  *
6838  * fan_watchdog (driver):
6839  *      fan watchdog interval in seconds, 0 disables (default), max 120
6840  */
6841
6842 /* sysfs fan pwm1_enable ----------------------------------------------- */
6843 static ssize_t fan_pwm1_enable_show(struct device *dev,
6844                                     struct device_attribute *attr,
6845                                     char *buf)
6846 {
6847         int res, mode;
6848         u8 status;
6849
6850         res = fan_get_status_safe(&status);
6851         if (res)
6852                 return res;
6853
6854         if (status & TP_EC_FAN_FULLSPEED) {
6855                 mode = 0;
6856         } else if (status & TP_EC_FAN_AUTO) {
6857                 mode = 2;
6858         } else
6859                 mode = 1;
6860
6861         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6862 }
6863
6864 static ssize_t fan_pwm1_enable_store(struct device *dev,
6865                                      struct device_attribute *attr,
6866                                      const char *buf, size_t count)
6867 {
6868         unsigned long t;
6869         int res, level;
6870
6871         if (parse_strtoul(buf, 2, &t))
6872                 return -EINVAL;
6873
6874         tpacpi_disclose_usertask("hwmon pwm1_enable",
6875                         "set fan mode to %lu\n", t);
6876
6877         switch (t) {
6878         case 0:
6879                 level = TP_EC_FAN_FULLSPEED;
6880                 break;
6881         case 1:
6882                 level = TPACPI_FAN_LAST_LEVEL;
6883                 break;
6884         case 2:
6885                 level = TP_EC_FAN_AUTO;
6886                 break;
6887         case 3:
6888                 /* reserved for software-controlled auto mode */
6889                 return -ENOSYS;
6890         default:
6891                 return -EINVAL;
6892         }
6893
6894         res = fan_set_level_safe(level);
6895         if (res == -ENXIO)
6896                 return -EINVAL;
6897         else if (res < 0)
6898                 return res;
6899
6900         fan_watchdog_reset();
6901
6902         return count;
6903 }
6904
6905 static struct device_attribute dev_attr_fan_pwm1_enable =
6906         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6907                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6908
6909 /* sysfs fan pwm1 ------------------------------------------------------ */
6910 static ssize_t fan_pwm1_show(struct device *dev,
6911                              struct device_attribute *attr,
6912                              char *buf)
6913 {
6914         int res;
6915         u8 status;
6916
6917         res = fan_get_status_safe(&status);
6918         if (res)
6919                 return res;
6920
6921         if ((status &
6922              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6923                 status = fan_control_desired_level;
6924
6925         if (status > 7)
6926                 status = 7;
6927
6928         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6929 }
6930
6931 static ssize_t fan_pwm1_store(struct device *dev,
6932                               struct device_attribute *attr,
6933                               const char *buf, size_t count)
6934 {
6935         unsigned long s;
6936         int rc;
6937         u8 status, newlevel;
6938
6939         if (parse_strtoul(buf, 255, &s))
6940                 return -EINVAL;
6941
6942         tpacpi_disclose_usertask("hwmon pwm1",
6943                         "set fan speed to %lu\n", s);
6944
6945         /* scale down from 0-255 to 0-7 */
6946         newlevel = (s >> 5) & 0x07;
6947
6948         if (mutex_lock_killable(&fan_mutex))
6949                 return -ERESTARTSYS;
6950
6951         rc = fan_get_status(&status);
6952         if (!rc && (status &
6953                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6954                 rc = fan_set_level(newlevel);
6955                 if (rc == -ENXIO)
6956                         rc = -EINVAL;
6957                 else if (!rc) {
6958                         fan_update_desired_level(newlevel);
6959                         fan_watchdog_reset();
6960                 }
6961         }
6962
6963         mutex_unlock(&fan_mutex);
6964         return (rc)? rc : count;
6965 }
6966
6967 static struct device_attribute dev_attr_fan_pwm1 =
6968         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6969                 fan_pwm1_show, fan_pwm1_store);
6970
6971 /* sysfs fan fan1_input ------------------------------------------------ */
6972 static ssize_t fan_fan1_input_show(struct device *dev,
6973                            struct device_attribute *attr,
6974                            char *buf)
6975 {
6976         int res;
6977         unsigned int speed;
6978
6979         res = fan_get_speed(&speed);
6980         if (res < 0)
6981                 return res;
6982
6983         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6984 }
6985
6986 static struct device_attribute dev_attr_fan_fan1_input =
6987         __ATTR(fan1_input, S_IRUGO,
6988                 fan_fan1_input_show, NULL);
6989
6990 /* sysfs fan fan2_input ------------------------------------------------ */
6991 static ssize_t fan_fan2_input_show(struct device *dev,
6992                            struct device_attribute *attr,
6993                            char *buf)
6994 {
6995         int res;
6996         unsigned int speed;
6997
6998         res = fan2_get_speed(&speed);
6999         if (res < 0)
7000                 return res;
7001
7002         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7003 }
7004
7005 static struct device_attribute dev_attr_fan_fan2_input =
7006         __ATTR(fan2_input, S_IRUGO,
7007                 fan_fan2_input_show, NULL);
7008
7009 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7010 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7011                                      char *buf)
7012 {
7013         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7014 }
7015
7016 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7017                                       const char *buf, size_t count)
7018 {
7019         unsigned long t;
7020
7021         if (parse_strtoul(buf, 120, &t))
7022                 return -EINVAL;
7023
7024         if (!fan_control_allowed)
7025                 return -EPERM;
7026
7027         fan_watchdog_maxinterval = t;
7028         fan_watchdog_reset();
7029
7030         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7031
7032         return count;
7033 }
7034
7035 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7036                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7037
7038 /* --------------------------------------------------------------------- */
7039 static struct attribute *fan_attributes[] = {
7040         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7041         &dev_attr_fan_fan1_input.attr,
7042         NULL, /* for fan2_input */
7043         NULL
7044 };
7045
7046 static const struct attribute_group fan_attr_group = {
7047         .attrs = fan_attributes,
7048 };
7049
7050 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7051 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7052
7053 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7054         { .vendor = PCI_VENDOR_ID_IBM,          \
7055           .bios = TPACPI_MATCH_ANY,             \
7056           .ec = TPID(__id1, __id2),             \
7057           .quirks = __quirks }
7058
7059 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7060         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7061           .bios = TPACPI_MATCH_ANY,             \
7062           .ec = TPID(__id1, __id2),             \
7063           .quirks = __quirks }
7064
7065 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7066         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7067         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7068         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7069         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7070         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7071 };
7072
7073 #undef TPACPI_FAN_QL
7074 #undef TPACPI_FAN_QI
7075
7076 static int __init fan_init(struct ibm_init_struct *iibm)
7077 {
7078         int rc;
7079         unsigned long quirks;
7080
7081         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7082                         "initializing fan subdriver\n");
7083
7084         mutex_init(&fan_mutex);
7085         fan_status_access_mode = TPACPI_FAN_NONE;
7086         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7087         fan_control_commands = 0;
7088         fan_watchdog_maxinterval = 0;
7089         tp_features.fan_ctrl_status_undef = 0;
7090         tp_features.second_fan = 0;
7091         fan_control_desired_level = 7;
7092
7093         TPACPI_ACPIHANDLE_INIT(fans);
7094         TPACPI_ACPIHANDLE_INIT(gfan);
7095         TPACPI_ACPIHANDLE_INIT(sfan);
7096
7097         quirks = tpacpi_check_quirks(fan_quirk_table,
7098                                      ARRAY_SIZE(fan_quirk_table));
7099
7100         if (gfan_handle) {
7101                 /* 570, 600e/x, 770e, 770x */
7102                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7103         } else {
7104                 /* all other ThinkPads: note that even old-style
7105                  * ThinkPad ECs supports the fan control register */
7106                 if (likely(acpi_ec_read(fan_status_offset,
7107                                         &fan_control_initial_status))) {
7108                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7109                         if (quirks & TPACPI_FAN_Q1)
7110                                 fan_quirk1_setup();
7111                         if (quirks & TPACPI_FAN_2FAN) {
7112                                 tp_features.second_fan = 1;
7113                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7114                                         "secondary fan support enabled\n");
7115                         }
7116                 } else {
7117                         printk(TPACPI_ERR
7118                                "ThinkPad ACPI EC access misbehaving, "
7119                                "fan status and control unavailable\n");
7120                         return 1;
7121                 }
7122         }
7123
7124         if (sfan_handle) {
7125                 /* 570, 770x-JL */
7126                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7127                 fan_control_commands |=
7128                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7129         } else {
7130                 if (!gfan_handle) {
7131                         /* gfan without sfan means no fan control */
7132                         /* all other models implement TP EC 0x2f control */
7133
7134                         if (fans_handle) {
7135                                 /* X31, X40, X41 */
7136                                 fan_control_access_mode =
7137                                     TPACPI_FAN_WR_ACPI_FANS;
7138                                 fan_control_commands |=
7139                                     TPACPI_FAN_CMD_SPEED |
7140                                     TPACPI_FAN_CMD_LEVEL |
7141                                     TPACPI_FAN_CMD_ENABLE;
7142                         } else {
7143                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7144                                 fan_control_commands |=
7145                                     TPACPI_FAN_CMD_LEVEL |
7146                                     TPACPI_FAN_CMD_ENABLE;
7147                         }
7148                 }
7149         }
7150
7151         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7152                 "fan is %s, modes %d, %d\n",
7153                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7154                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7155                 fan_status_access_mode, fan_control_access_mode);
7156
7157         /* fan control master switch */
7158         if (!fan_control_allowed) {
7159                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7160                 fan_control_commands = 0;
7161                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7162                            "fan control features disabled by parameter\n");
7163         }
7164
7165         /* update fan_control_desired_level */
7166         if (fan_status_access_mode != TPACPI_FAN_NONE)
7167                 fan_get_status_safe(NULL);
7168
7169         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7170             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7171                 if (tp_features.second_fan) {
7172                         /* attach second fan tachometer */
7173                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7174                                         &dev_attr_fan_fan2_input.attr;
7175                 }
7176                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7177                                          &fan_attr_group);
7178                 if (rc < 0)
7179                         return rc;
7180
7181                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7182                                         &driver_attr_fan_watchdog);
7183                 if (rc < 0) {
7184                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7185                                         &fan_attr_group);
7186                         return rc;
7187                 }
7188                 return 0;
7189         } else
7190                 return 1;
7191 }
7192
7193 static void fan_exit(void)
7194 {
7195         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7196                     "cancelling any pending fan watchdog tasks\n");
7197
7198         /* FIXME: can we really do this unconditionally? */
7199         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7200         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7201                            &driver_attr_fan_watchdog);
7202
7203         cancel_delayed_work(&fan_watchdog_task);
7204         flush_workqueue(tpacpi_wq);
7205 }
7206
7207 static void fan_suspend(pm_message_t state)
7208 {
7209         int rc;
7210
7211         if (!fan_control_allowed)
7212                 return;
7213
7214         /* Store fan status in cache */
7215         fan_control_resume_level = 0;
7216         rc = fan_get_status_safe(&fan_control_resume_level);
7217         if (rc < 0)
7218                 printk(TPACPI_NOTICE
7219                         "failed to read fan level for later "
7220                         "restore during resume: %d\n", rc);
7221
7222         /* if it is undefined, don't attempt to restore it.
7223          * KEEP THIS LAST */
7224         if (tp_features.fan_ctrl_status_undef)
7225                 fan_control_resume_level = 0;
7226 }
7227
7228 static void fan_resume(void)
7229 {
7230         u8 current_level = 7;
7231         bool do_set = false;
7232         int rc;
7233
7234         /* DSDT *always* updates status on resume */
7235         tp_features.fan_ctrl_status_undef = 0;
7236
7237         if (!fan_control_allowed ||
7238             !fan_control_resume_level ||
7239             (fan_get_status_safe(&current_level) < 0))
7240                 return;
7241
7242         switch (fan_control_access_mode) {
7243         case TPACPI_FAN_WR_ACPI_SFAN:
7244                 /* never decrease fan level */
7245                 do_set = (fan_control_resume_level > current_level);
7246                 break;
7247         case TPACPI_FAN_WR_ACPI_FANS:
7248         case TPACPI_FAN_WR_TPEC:
7249                 /* never decrease fan level, scale is:
7250                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7251                  *
7252                  * We expect the firmware to set either 7 or AUTO, but we
7253                  * handle FULLSPEED out of paranoia.
7254                  *
7255                  * So, we can safely only restore FULLSPEED or 7, anything
7256                  * else could slow the fan.  Restoring AUTO is useless, at
7257                  * best that's exactly what the DSDT already set (it is the
7258                  * slower it uses).
7259                  *
7260                  * Always keep in mind that the DSDT *will* have set the
7261                  * fans to what the vendor supposes is the best level.  We
7262                  * muck with it only to speed the fan up.
7263                  */
7264                 if (fan_control_resume_level != 7 &&
7265                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7266                         return;
7267                 else
7268                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7269                                  (current_level != fan_control_resume_level);
7270                 break;
7271         default:
7272                 return;
7273         }
7274         if (do_set) {
7275                 printk(TPACPI_NOTICE
7276                         "restoring fan level to 0x%02x\n",
7277                         fan_control_resume_level);
7278                 rc = fan_set_level_safe(fan_control_resume_level);
7279                 if (rc < 0)
7280                         printk(TPACPI_NOTICE
7281                                 "failed to restore fan level: %d\n", rc);
7282         }
7283 }
7284
7285 static int fan_read(char *p)
7286 {
7287         int len = 0;
7288         int rc;
7289         u8 status;
7290         unsigned int speed = 0;
7291
7292         switch (fan_status_access_mode) {
7293         case TPACPI_FAN_RD_ACPI_GFAN:
7294                 /* 570, 600e/x, 770e, 770x */
7295                 rc = fan_get_status_safe(&status);
7296                 if (rc < 0)
7297                         return rc;
7298
7299                 len += sprintf(p + len, "status:\t\t%s\n"
7300                                "level:\t\t%d\n",
7301                                (status != 0) ? "enabled" : "disabled", status);
7302                 break;
7303
7304         case TPACPI_FAN_RD_TPEC:
7305                 /* all except 570, 600e/x, 770e, 770x */
7306                 rc = fan_get_status_safe(&status);
7307                 if (rc < 0)
7308                         return rc;
7309
7310                 len += sprintf(p + len, "status:\t\t%s\n",
7311                                (status != 0) ? "enabled" : "disabled");
7312
7313                 rc = fan_get_speed(&speed);
7314                 if (rc < 0)
7315                         return rc;
7316
7317                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7318
7319                 if (status & TP_EC_FAN_FULLSPEED)
7320                         /* Disengaged mode takes precedence */
7321                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7322                 else if (status & TP_EC_FAN_AUTO)
7323                         len += sprintf(p + len, "level:\t\tauto\n");
7324                 else
7325                         len += sprintf(p + len, "level:\t\t%d\n", status);
7326                 break;
7327
7328         case TPACPI_FAN_NONE:
7329         default:
7330                 len += sprintf(p + len, "status:\t\tnot supported\n");
7331         }
7332
7333         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7334                 len += sprintf(p + len, "commands:\tlevel <level>");
7335
7336                 switch (fan_control_access_mode) {
7337                 case TPACPI_FAN_WR_ACPI_SFAN:
7338                         len += sprintf(p + len, " (<level> is 0-7)\n");
7339                         break;
7340
7341                 default:
7342                         len += sprintf(p + len, " (<level> is 0-7, "
7343                                        "auto, disengaged, full-speed)\n");
7344                         break;
7345                 }
7346         }
7347
7348         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7349                 len += sprintf(p + len, "commands:\tenable, disable\n"
7350                                "commands:\twatchdog <timeout> (<timeout> "
7351                                "is 0 (off), 1-120 (seconds))\n");
7352
7353         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7354                 len += sprintf(p + len, "commands:\tspeed <speed>"
7355                                " (<speed> is 0-65535)\n");
7356
7357         return len;
7358 }
7359
7360 static int fan_write_cmd_level(const char *cmd, int *rc)
7361 {
7362         int level;
7363
7364         if (strlencmp(cmd, "level auto") == 0)
7365                 level = TP_EC_FAN_AUTO;
7366         else if ((strlencmp(cmd, "level disengaged") == 0) |
7367                         (strlencmp(cmd, "level full-speed") == 0))
7368                 level = TP_EC_FAN_FULLSPEED;
7369         else if (sscanf(cmd, "level %d", &level) != 1)
7370                 return 0;
7371
7372         *rc = fan_set_level_safe(level);
7373         if (*rc == -ENXIO)
7374                 printk(TPACPI_ERR "level command accepted for unsupported "
7375                        "access mode %d", fan_control_access_mode);
7376         else if (!*rc)
7377                 tpacpi_disclose_usertask("procfs fan",
7378                         "set level to %d\n", level);
7379
7380         return 1;
7381 }
7382
7383 static int fan_write_cmd_enable(const char *cmd, int *rc)
7384 {
7385         if (strlencmp(cmd, "enable") != 0)
7386                 return 0;
7387
7388         *rc = fan_set_enable();
7389         if (*rc == -ENXIO)
7390                 printk(TPACPI_ERR "enable command accepted for unsupported "
7391                        "access mode %d", fan_control_access_mode);
7392         else if (!*rc)
7393                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7394
7395         return 1;
7396 }
7397
7398 static int fan_write_cmd_disable(const char *cmd, int *rc)
7399 {
7400         if (strlencmp(cmd, "disable") != 0)
7401                 return 0;
7402
7403         *rc = fan_set_disable();
7404         if (*rc == -ENXIO)
7405                 printk(TPACPI_ERR "disable command accepted for unsupported "
7406                        "access mode %d", fan_control_access_mode);
7407         else if (!*rc)
7408                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7409
7410         return 1;
7411 }
7412
7413 static int fan_write_cmd_speed(const char *cmd, int *rc)
7414 {
7415         int speed;
7416
7417         /* TODO:
7418          * Support speed <low> <medium> <high> ? */
7419
7420         if (sscanf(cmd, "speed %d", &speed) != 1)
7421                 return 0;
7422
7423         *rc = fan_set_speed(speed);
7424         if (*rc == -ENXIO)
7425                 printk(TPACPI_ERR "speed command accepted for unsupported "
7426                        "access mode %d", fan_control_access_mode);
7427         else if (!*rc)
7428                 tpacpi_disclose_usertask("procfs fan",
7429                         "set speed to %d\n", speed);
7430
7431         return 1;
7432 }
7433
7434 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7435 {
7436         int interval;
7437
7438         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7439                 return 0;
7440
7441         if (interval < 0 || interval > 120)
7442                 *rc = -EINVAL;
7443         else {
7444                 fan_watchdog_maxinterval = interval;
7445                 tpacpi_disclose_usertask("procfs fan",
7446                         "set watchdog timer to %d\n",
7447                         interval);
7448         }
7449
7450         return 1;
7451 }
7452
7453 static int fan_write(char *buf)
7454 {
7455         char *cmd;
7456         int rc = 0;
7457
7458         while (!rc && (cmd = next_cmd(&buf))) {
7459                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7460                       fan_write_cmd_level(cmd, &rc)) &&
7461                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7462                       (fan_write_cmd_enable(cmd, &rc) ||
7463                        fan_write_cmd_disable(cmd, &rc) ||
7464                        fan_write_cmd_watchdog(cmd, &rc))) &&
7465                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7466                       fan_write_cmd_speed(cmd, &rc))
7467                     )
7468                         rc = -EINVAL;
7469                 else if (!rc)
7470                         fan_watchdog_reset();
7471         }
7472
7473         return rc;
7474 }
7475
7476 static struct ibm_struct fan_driver_data = {
7477         .name = "fan",
7478         .read = fan_read,
7479         .write = fan_write,
7480         .exit = fan_exit,
7481         .suspend = fan_suspend,
7482         .resume = fan_resume,
7483 };
7484
7485 /****************************************************************************
7486  ****************************************************************************
7487  *
7488  * Infrastructure
7489  *
7490  ****************************************************************************
7491  ****************************************************************************/
7492
7493 /* sysfs name ---------------------------------------------------------- */
7494 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7495                            struct device_attribute *attr,
7496                            char *buf)
7497 {
7498         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7499 }
7500
7501 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7502         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7503
7504 /* --------------------------------------------------------------------- */
7505
7506 /* /proc support */
7507 static struct proc_dir_entry *proc_dir;
7508
7509 /*
7510  * Module and infrastructure proble, init and exit handling
7511  */
7512
7513 static int force_load;
7514
7515 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7516 static const char * __init str_supported(int is_supported)
7517 {
7518         static char text_unsupported[] __initdata = "not supported";
7519
7520         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7521 }
7522 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7523
7524 static void ibm_exit(struct ibm_struct *ibm)
7525 {
7526         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7527
7528         list_del_init(&ibm->all_drivers);
7529
7530         if (ibm->flags.acpi_notify_installed) {
7531                 dbg_printk(TPACPI_DBG_EXIT,
7532                         "%s: acpi_remove_notify_handler\n", ibm->name);
7533                 BUG_ON(!ibm->acpi);
7534                 acpi_remove_notify_handler(*ibm->acpi->handle,
7535                                            ibm->acpi->type,
7536                                            dispatch_acpi_notify);
7537                 ibm->flags.acpi_notify_installed = 0;
7538                 ibm->flags.acpi_notify_installed = 0;
7539         }
7540
7541         if (ibm->flags.proc_created) {
7542                 dbg_printk(TPACPI_DBG_EXIT,
7543                         "%s: remove_proc_entry\n", ibm->name);
7544                 remove_proc_entry(ibm->name, proc_dir);
7545                 ibm->flags.proc_created = 0;
7546         }
7547
7548         if (ibm->flags.acpi_driver_registered) {
7549                 dbg_printk(TPACPI_DBG_EXIT,
7550                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7551                 BUG_ON(!ibm->acpi);
7552                 acpi_bus_unregister_driver(ibm->acpi->driver);
7553                 kfree(ibm->acpi->driver);
7554                 ibm->acpi->driver = NULL;
7555                 ibm->flags.acpi_driver_registered = 0;
7556         }
7557
7558         if (ibm->flags.init_called && ibm->exit) {
7559                 ibm->exit();
7560                 ibm->flags.init_called = 0;
7561         }
7562
7563         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7564 }
7565
7566 static int __init ibm_init(struct ibm_init_struct *iibm)
7567 {
7568         int ret;
7569         struct ibm_struct *ibm = iibm->data;
7570         struct proc_dir_entry *entry;
7571
7572         BUG_ON(ibm == NULL);
7573
7574         INIT_LIST_HEAD(&ibm->all_drivers);
7575
7576         if (ibm->flags.experimental && !experimental)
7577                 return 0;
7578
7579         dbg_printk(TPACPI_DBG_INIT,
7580                 "probing for %s\n", ibm->name);
7581
7582         if (iibm->init) {
7583                 ret = iibm->init(iibm);
7584                 if (ret > 0)
7585                         return 0;       /* probe failed */
7586                 if (ret)
7587                         return ret;
7588
7589                 ibm->flags.init_called = 1;
7590         }
7591
7592         if (ibm->acpi) {
7593                 if (ibm->acpi->hid) {
7594                         ret = register_tpacpi_subdriver(ibm);
7595                         if (ret)
7596                                 goto err_out;
7597                 }
7598
7599                 if (ibm->acpi->notify) {
7600                         ret = setup_acpi_notify(ibm);
7601                         if (ret == -ENODEV) {
7602                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7603                                         ibm->name);
7604                                 ret = 0;
7605                                 goto err_out;
7606                         }
7607                         if (ret < 0)
7608                                 goto err_out;
7609                 }
7610         }
7611
7612         dbg_printk(TPACPI_DBG_INIT,
7613                 "%s installed\n", ibm->name);
7614
7615         if (ibm->read) {
7616                 entry = create_proc_entry(ibm->name,
7617                                           S_IFREG | S_IRUGO | S_IWUSR,
7618                                           proc_dir);
7619                 if (!entry) {
7620                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7621                                ibm->name);
7622                         ret = -ENODEV;
7623                         goto err_out;
7624                 }
7625                 entry->data = ibm;
7626                 entry->read_proc = &dispatch_procfs_read;
7627                 if (ibm->write)
7628                         entry->write_proc = &dispatch_procfs_write;
7629                 ibm->flags.proc_created = 1;
7630         }
7631
7632         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7633
7634         return 0;
7635
7636 err_out:
7637         dbg_printk(TPACPI_DBG_INIT,
7638                 "%s: at error exit path with result %d\n",
7639                 ibm->name, ret);
7640
7641         ibm_exit(ibm);
7642         return (ret < 0)? ret : 0;
7643 }
7644
7645 /* Probing */
7646
7647 static bool __pure __init tpacpi_is_fw_digit(const char c)
7648 {
7649         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7650 }
7651
7652 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7653 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7654                                                 const char t)
7655 {
7656         return s && strlen(s) >= 8 &&
7657                 tpacpi_is_fw_digit(s[0]) &&
7658                 tpacpi_is_fw_digit(s[1]) &&
7659                 s[2] == t && s[3] == 'T' &&
7660                 tpacpi_is_fw_digit(s[4]) &&
7661                 tpacpi_is_fw_digit(s[5]) &&
7662                 s[6] == 'W' && s[7] == 'W';
7663 }
7664
7665 /* returns 0 - probe ok, or < 0 - probe error.
7666  * Probe ok doesn't mean thinkpad found.
7667  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7668 static int __must_check __init get_thinkpad_model_data(
7669                                                 struct thinkpad_id_data *tp)
7670 {
7671         const struct dmi_device *dev = NULL;
7672         char ec_fw_string[18];
7673         char const *s;
7674
7675         if (!tp)
7676                 return -EINVAL;
7677
7678         memset(tp, 0, sizeof(*tp));
7679
7680         if (dmi_name_in_vendors("IBM"))
7681                 tp->vendor = PCI_VENDOR_ID_IBM;
7682         else if (dmi_name_in_vendors("LENOVO"))
7683                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7684         else
7685                 return 0;
7686
7687         s = dmi_get_system_info(DMI_BIOS_VERSION);
7688         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7689         if (s && !tp->bios_version_str)
7690                 return -ENOMEM;
7691
7692         /* Really ancient ThinkPad 240X will fail this, which is fine */
7693         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7694                 return 0;
7695
7696         tp->bios_model = tp->bios_version_str[0]
7697                          | (tp->bios_version_str[1] << 8);
7698         tp->bios_release = (tp->bios_version_str[4] << 8)
7699                          | tp->bios_version_str[5];
7700
7701         /*
7702          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7703          * X32 or newer, all Z series;  Some models must have an
7704          * up-to-date BIOS or they will not be detected.
7705          *
7706          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7707          */
7708         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7709                 if (sscanf(dev->name,
7710                            "IBM ThinkPad Embedded Controller -[%17c",
7711                            ec_fw_string) == 1) {
7712                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7713                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7714
7715                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7716                         if (!tp->ec_version_str)
7717                                 return -ENOMEM;
7718
7719                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7720                                 tp->ec_model = ec_fw_string[0]
7721                                                 | (ec_fw_string[1] << 8);
7722                                 tp->ec_release = (ec_fw_string[4] << 8)
7723                                                 | ec_fw_string[5];
7724                         } else {
7725                                 printk(TPACPI_NOTICE
7726                                         "ThinkPad firmware release %s "
7727                                         "doesn't match the known patterns\n",
7728                                         ec_fw_string);
7729                                 printk(TPACPI_NOTICE
7730                                         "please report this to %s\n",
7731                                         TPACPI_MAIL);
7732                         }
7733                         break;
7734                 }
7735         }
7736
7737         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7738         if (s && !strnicmp(s, "ThinkPad", 8)) {
7739                 tp->model_str = kstrdup(s, GFP_KERNEL);
7740                 if (!tp->model_str)
7741                         return -ENOMEM;
7742         }
7743
7744         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7745         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7746         if (s && !tp->nummodel_str)
7747                 return -ENOMEM;
7748
7749         return 0;
7750 }
7751
7752 static int __init probe_for_thinkpad(void)
7753 {
7754         int is_thinkpad;
7755
7756         if (acpi_disabled)
7757                 return -ENODEV;
7758
7759         /*
7760          * Non-ancient models have better DMI tagging, but very old models
7761          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
7762          */
7763         is_thinkpad = (thinkpad_id.model_str != NULL) ||
7764                       (thinkpad_id.ec_model != 0) ||
7765                       tpacpi_is_fw_known();
7766
7767         /* ec is required because many other handles are relative to it */
7768         TPACPI_ACPIHANDLE_INIT(ec);
7769         if (!ec_handle) {
7770                 if (is_thinkpad)
7771                         printk(TPACPI_ERR
7772                                 "Not yet supported ThinkPad detected!\n");
7773                 return -ENODEV;
7774         }
7775
7776         if (!is_thinkpad && !force_load)
7777                 return -ENODEV;
7778
7779         return 0;
7780 }
7781
7782
7783 /* Module init, exit, parameters */
7784
7785 static struct ibm_init_struct ibms_init[] __initdata = {
7786         {
7787                 .init = thinkpad_acpi_driver_init,
7788                 .data = &thinkpad_acpi_driver_data,
7789         },
7790         {
7791                 .init = hotkey_init,
7792                 .data = &hotkey_driver_data,
7793         },
7794         {
7795                 .init = bluetooth_init,
7796                 .data = &bluetooth_driver_data,
7797         },
7798         {
7799                 .init = wan_init,
7800                 .data = &wan_driver_data,
7801         },
7802         {
7803                 .init = uwb_init,
7804                 .data = &uwb_driver_data,
7805         },
7806 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7807         {
7808                 .init = video_init,
7809                 .data = &video_driver_data,
7810         },
7811 #endif
7812         {
7813                 .init = light_init,
7814                 .data = &light_driver_data,
7815         },
7816         {
7817                 .init = cmos_init,
7818                 .data = &cmos_driver_data,
7819         },
7820         {
7821                 .init = led_init,
7822                 .data = &led_driver_data,
7823         },
7824         {
7825                 .init = beep_init,
7826                 .data = &beep_driver_data,
7827         },
7828         {
7829                 .init = thermal_init,
7830                 .data = &thermal_driver_data,
7831         },
7832         {
7833                 .data = &ecdump_driver_data,
7834         },
7835         {
7836                 .init = brightness_init,
7837                 .data = &brightness_driver_data,
7838         },
7839         {
7840                 .data = &volume_driver_data,
7841         },
7842         {
7843                 .init = fan_init,
7844                 .data = &fan_driver_data,
7845         },
7846 };
7847
7848 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7849 {
7850         unsigned int i;
7851         struct ibm_struct *ibm;
7852
7853         if (!kp || !kp->name || !val)
7854                 return -EINVAL;
7855
7856         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7857                 ibm = ibms_init[i].data;
7858                 WARN_ON(ibm == NULL);
7859
7860                 if (!ibm || !ibm->name)
7861                         continue;
7862
7863                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7864                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7865                                 return -ENOSPC;
7866                         strcpy(ibms_init[i].param, val);
7867                         strcat(ibms_init[i].param, ",");
7868                         return 0;
7869                 }
7870         }
7871
7872         return -EINVAL;
7873 }
7874
7875 module_param(experimental, int, 0);
7876 MODULE_PARM_DESC(experimental,
7877                  "Enables experimental features when non-zero");
7878
7879 module_param_named(debug, dbg_level, uint, 0);
7880 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7881
7882 module_param(force_load, bool, 0);
7883 MODULE_PARM_DESC(force_load,
7884                  "Attempts to load the driver even on a "
7885                  "mis-identified ThinkPad when true");
7886
7887 module_param_named(fan_control, fan_control_allowed, bool, 0);
7888 MODULE_PARM_DESC(fan_control,
7889                  "Enables setting fan parameters features when true");
7890
7891 module_param_named(brightness_mode, brightness_mode, uint, 0);
7892 MODULE_PARM_DESC(brightness_mode,
7893                  "Selects brightness control strategy: "
7894                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7895
7896 module_param(brightness_enable, uint, 0);
7897 MODULE_PARM_DESC(brightness_enable,
7898                  "Enables backlight control when 1, disables when 0");
7899
7900 module_param(hotkey_report_mode, uint, 0);
7901 MODULE_PARM_DESC(hotkey_report_mode,
7902                  "used for backwards compatibility with userspace, "
7903                  "see documentation");
7904
7905 #define TPACPI_PARAM(feature) \
7906         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7907         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7908                          "at module load, see documentation")
7909
7910 TPACPI_PARAM(hotkey);
7911 TPACPI_PARAM(bluetooth);
7912 TPACPI_PARAM(video);
7913 TPACPI_PARAM(light);
7914 TPACPI_PARAM(cmos);
7915 TPACPI_PARAM(led);
7916 TPACPI_PARAM(beep);
7917 TPACPI_PARAM(ecdump);
7918 TPACPI_PARAM(brightness);
7919 TPACPI_PARAM(volume);
7920 TPACPI_PARAM(fan);
7921
7922 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7923 module_param(dbg_wlswemul, uint, 0);
7924 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7925 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7926 MODULE_PARM_DESC(wlsw_state,
7927                  "Initial state of the emulated WLSW switch");
7928
7929 module_param(dbg_bluetoothemul, uint, 0);
7930 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7931 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7932 MODULE_PARM_DESC(bluetooth_state,
7933                  "Initial state of the emulated bluetooth switch");
7934
7935 module_param(dbg_wwanemul, uint, 0);
7936 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7937 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7938 MODULE_PARM_DESC(wwan_state,
7939                  "Initial state of the emulated WWAN switch");
7940
7941 module_param(dbg_uwbemul, uint, 0);
7942 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7943 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7944 MODULE_PARM_DESC(uwb_state,
7945                  "Initial state of the emulated UWB switch");
7946 #endif
7947
7948 static void thinkpad_acpi_module_exit(void)
7949 {
7950         struct ibm_struct *ibm, *itmp;
7951
7952         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7953
7954         list_for_each_entry_safe_reverse(ibm, itmp,
7955                                          &tpacpi_all_drivers,
7956                                          all_drivers) {
7957                 ibm_exit(ibm);
7958         }
7959
7960         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7961
7962         if (tpacpi_inputdev) {
7963                 if (tp_features.input_device_registered)
7964                         input_unregister_device(tpacpi_inputdev);
7965                 else
7966                         input_free_device(tpacpi_inputdev);
7967         }
7968
7969         if (tpacpi_hwmon)
7970                 hwmon_device_unregister(tpacpi_hwmon);
7971
7972         if (tp_features.sensors_pdev_attrs_registered)
7973                 device_remove_file(&tpacpi_sensors_pdev->dev,
7974                                    &dev_attr_thinkpad_acpi_pdev_name);
7975         if (tpacpi_sensors_pdev)
7976                 platform_device_unregister(tpacpi_sensors_pdev);
7977         if (tpacpi_pdev)
7978                 platform_device_unregister(tpacpi_pdev);
7979
7980         if (tp_features.sensors_pdrv_attrs_registered)
7981                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7982         if (tp_features.platform_drv_attrs_registered)
7983                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7984
7985         if (tp_features.sensors_pdrv_registered)
7986                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7987
7988         if (tp_features.platform_drv_registered)
7989                 platform_driver_unregister(&tpacpi_pdriver);
7990
7991         if (proc_dir)
7992                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7993
7994         if (tpacpi_wq)
7995                 destroy_workqueue(tpacpi_wq);
7996
7997         kfree(thinkpad_id.bios_version_str);
7998         kfree(thinkpad_id.ec_version_str);
7999         kfree(thinkpad_id.model_str);
8000 }
8001
8002
8003 static int __init thinkpad_acpi_module_init(void)
8004 {
8005         int ret, i;
8006
8007         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8008
8009         /* Parameter checking */
8010         if (hotkey_report_mode > 2)
8011                 return -EINVAL;
8012
8013         /* Driver-level probe */
8014
8015         ret = get_thinkpad_model_data(&thinkpad_id);
8016         if (ret) {
8017                 printk(TPACPI_ERR
8018                         "unable to get DMI data: %d\n", ret);
8019                 thinkpad_acpi_module_exit();
8020                 return ret;
8021         }
8022         ret = probe_for_thinkpad();
8023         if (ret) {
8024                 thinkpad_acpi_module_exit();
8025                 return ret;
8026         }
8027
8028         /* Driver initialization */
8029
8030         TPACPI_ACPIHANDLE_INIT(ecrd);
8031         TPACPI_ACPIHANDLE_INIT(ecwr);
8032
8033         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8034         if (!tpacpi_wq) {
8035                 thinkpad_acpi_module_exit();
8036                 return -ENOMEM;
8037         }
8038
8039         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8040         if (!proc_dir) {
8041                 printk(TPACPI_ERR
8042                        "unable to create proc dir " TPACPI_PROC_DIR);
8043                 thinkpad_acpi_module_exit();
8044                 return -ENODEV;
8045         }
8046
8047         ret = platform_driver_register(&tpacpi_pdriver);
8048         if (ret) {
8049                 printk(TPACPI_ERR
8050                        "unable to register main platform driver\n");
8051                 thinkpad_acpi_module_exit();
8052                 return ret;
8053         }
8054         tp_features.platform_drv_registered = 1;
8055
8056         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8057         if (ret) {
8058                 printk(TPACPI_ERR
8059                        "unable to register hwmon platform driver\n");
8060                 thinkpad_acpi_module_exit();
8061                 return ret;
8062         }
8063         tp_features.sensors_pdrv_registered = 1;
8064
8065         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8066         if (!ret) {
8067                 tp_features.platform_drv_attrs_registered = 1;
8068                 ret = tpacpi_create_driver_attributes(
8069                                         &tpacpi_hwmon_pdriver.driver);
8070         }
8071         if (ret) {
8072                 printk(TPACPI_ERR
8073                        "unable to create sysfs driver attributes\n");
8074                 thinkpad_acpi_module_exit();
8075                 return ret;
8076         }
8077         tp_features.sensors_pdrv_attrs_registered = 1;
8078
8079
8080         /* Device initialization */
8081         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8082                                                         NULL, 0);
8083         if (IS_ERR(tpacpi_pdev)) {
8084                 ret = PTR_ERR(tpacpi_pdev);
8085                 tpacpi_pdev = NULL;
8086                 printk(TPACPI_ERR "unable to register platform device\n");
8087                 thinkpad_acpi_module_exit();
8088                 return ret;
8089         }
8090         tpacpi_sensors_pdev = platform_device_register_simple(
8091                                                 TPACPI_HWMON_DRVR_NAME,
8092                                                 -1, NULL, 0);
8093         if (IS_ERR(tpacpi_sensors_pdev)) {
8094                 ret = PTR_ERR(tpacpi_sensors_pdev);
8095                 tpacpi_sensors_pdev = NULL;
8096                 printk(TPACPI_ERR
8097                        "unable to register hwmon platform device\n");
8098                 thinkpad_acpi_module_exit();
8099                 return ret;
8100         }
8101         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8102                                  &dev_attr_thinkpad_acpi_pdev_name);
8103         if (ret) {
8104                 printk(TPACPI_ERR
8105                        "unable to create sysfs hwmon device attributes\n");
8106                 thinkpad_acpi_module_exit();
8107                 return ret;
8108         }
8109         tp_features.sensors_pdev_attrs_registered = 1;
8110         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8111         if (IS_ERR(tpacpi_hwmon)) {
8112                 ret = PTR_ERR(tpacpi_hwmon);
8113                 tpacpi_hwmon = NULL;
8114                 printk(TPACPI_ERR "unable to register hwmon device\n");
8115                 thinkpad_acpi_module_exit();
8116                 return ret;
8117         }
8118         mutex_init(&tpacpi_inputdev_send_mutex);
8119         tpacpi_inputdev = input_allocate_device();
8120         if (!tpacpi_inputdev) {
8121                 printk(TPACPI_ERR "unable to allocate input device\n");
8122                 thinkpad_acpi_module_exit();
8123                 return -ENOMEM;
8124         } else {
8125                 /* Prepare input device, but don't register */
8126                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8127                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8128                 tpacpi_inputdev->id.bustype = BUS_HOST;
8129                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8130                                                 thinkpad_id.vendor :
8131                                                 PCI_VENDOR_ID_IBM;
8132                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8133                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8134         }
8135         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8136                 ret = ibm_init(&ibms_init[i]);
8137                 if (ret >= 0 && *ibms_init[i].param)
8138                         ret = ibms_init[i].data->write(ibms_init[i].param);
8139                 if (ret < 0) {
8140                         thinkpad_acpi_module_exit();
8141                         return ret;
8142                 }
8143         }
8144         ret = input_register_device(tpacpi_inputdev);
8145         if (ret < 0) {
8146                 printk(TPACPI_ERR "unable to register input device\n");
8147                 thinkpad_acpi_module_exit();
8148                 return ret;
8149         } else {
8150                 tp_features.input_device_registered = 1;
8151         }
8152
8153         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8154         return 0;
8155 }
8156
8157 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8158
8159 /*
8160  * This will autoload the driver in almost every ThinkPad
8161  * in widespread use.
8162  *
8163  * Only _VERY_ old models, like the 240, 240x and 570 lack
8164  * the HKEY event interface.
8165  */
8166 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8167
8168 /*
8169  * DMI matching for module autoloading
8170  *
8171  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8172  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8173  *
8174  * Only models listed in thinkwiki will be supported, so add yours
8175  * if it is not there yet.
8176  */
8177 #define IBM_BIOS_MODULE_ALIAS(__type) \
8178         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8179
8180 /* Ancient thinkpad BIOSes have to be identified by
8181  * BIOS type or model number, and there are far less
8182  * BIOS types than model numbers... */
8183 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8184
8185 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8186 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8187 MODULE_DESCRIPTION(TPACPI_DESC);
8188 MODULE_VERSION(TPACPI_VERSION);
8189 MODULE_LICENSE("GPL");
8190
8191 module_init(thinkpad_acpi_module_init);
8192 module_exit(thinkpad_acpi_module_exit);