drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <[email protected]>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <[email protected]>
   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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  25
  26 #define TPACPI_VERSION "0.24"
  27 #define TPACPI_SYSFS_VERSION 0x020700
  28
  29 /*
  30  *  Changelog:
  31  *  2007-10-20          changelog trimmed down
  32  *
  33  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  34  *                      drivers/misc.
  35  *
  36  *  2006-11-22  0.13    new maintainer
  37  *                      changelog now lives in git commit history, and will
  38  *                      not be updated further in-file.
  39  *
  40  *  2005-03-17  0.11    support for 600e, 770x
  41  *                          thanks to Jamie Lentin <[email protected]>
  42  *
  43  *  2005-01-16  0.9     use MODULE_VERSION
  44  *                          thanks to Henrik Brix Andersen <[email protected]>
  45  *                      fix parameter passing on module loading
  46  *                          thanks to Rusty Russell <[email protected]>
  47  *                          thanks to Jim Radford <[email protected]>
  48  *  2004-11-08  0.8     fix init error case, don't return from a macro
  49  *                          thanks to Chris Wright <[email protected]>
  50  */
  51
  52 #include <linux/kernel.h>
  53 #include <linux/module.h>
  54 #include <linux/init.h>
  55 #include <linux/types.h>
  56 #include <linux/string.h>
  57 #include <linux/list.h>
  58 #include <linux/mutex.h>
  59 #include <linux/sched.h>
  60 #include <linux/kthread.h>
  61 #include <linux/freezer.h>
  62 #include <linux/delay.h>
  63 #include <linux/slab.h>
  64
  65 #include <linux/nvram.h>
  66 #include <linux/proc_fs.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/sysfs.h>
  69 #include <linux/backlight.h>
  70 #include <linux/fb.h>
  71 #include <linux/platform_device.h>
  72 #include <linux/hwmon.h>
  73 #include <linux/hwmon-sysfs.h>
  74 #include <linux/input.h>
  75 #include <linux/leds.h>
  76 #include <linux/rfkill.h>
  77 #include <asm/uaccess.h>
  78
  79 #include <linux/dmi.h>
  80 #include <linux/jiffies.h>
  81 #include <linux/workqueue.h>
  82
  83 #include <sound/core.h>
  84 #include <sound/control.h>
  85 #include <sound/initval.h>
  86
  87 #include <acpi/acpi_drivers.h>
  88
  89 #include <linux/pci_ids.h>
  90
  91
  92 /* ThinkPad CMOS commands */
  93 #define TP_CMOS_VOLUME_DOWN     0
  94 #define TP_CMOS_VOLUME_UP       1
  95 #define TP_CMOS_VOLUME_MUTE     2
  96 #define TP_CMOS_BRIGHTNESS_UP   4
  97 #define TP_CMOS_BRIGHTNESS_DOWN 5
  98 #define TP_CMOS_THINKLIGHT_ON   12
  99 #define TP_CMOS_THINKLIGHT_OFF  13
 100
 101 /* NVRAM Addresses */
 102 enum tp_nvram_addr {
 103         TP_NVRAM_ADDR_HK2               = 0x57,
 104         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
 105         TP_NVRAM_ADDR_VIDEO             = 0x59,
 106         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
 107         TP_NVRAM_ADDR_MIXER             = 0x60,
 108 };
 109
 110 /* NVRAM bit masks */
 111 enum {
 112         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 113         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 114         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 115         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 116         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 117         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 118         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 119         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 120         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 121         TP_NVRAM_MASK_MUTE              = 0x40,
 122         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 123         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 124         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 125 };
 126
 127 /* Misc NVRAM-related */
 128 enum {
 129         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
 130 };
 131
 132 /* ACPI HIDs */
 133 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
 134 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
 135 #define TPACPI_ACPI_EC_HID              "PNP0C09"
 136
 137 /* Input IDs */
 138 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 139 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 140
 141 /* ACPI \WGSV commands */
 142 enum {
 143         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 144         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 145         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 146         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 147 };
 148
 149 /* TP_ACPI_WGSV_GET_STATE bits */
 150 enum {
 151         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 152         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 153         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 154         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 155         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 156         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 157         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 158         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 159         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 160         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 161 };
 162
 163 /* HKEY events */
 164 enum tpacpi_hkey_event_t {
 165         /* Hotkey-related */
 166         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 167         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 168         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 169         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 170         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 171         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 172
 173         /* Reasons for waking up from S3/S4 */
 174         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 175         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 176         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 177         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 178         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 179         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 180
 181         /* Auto-sleep after eject request */
 182         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 183         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 184
 185         /* Misc bay events */
 186         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 187         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
 188                                                      or port replicator */
 189         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
 190                                                      dock or port replicator */
 191
 192         /* User-interface events */
 193         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 194         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 195         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 196         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 197         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 198         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 199         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 200
 201         /* Key-related user-interface events */
 202         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
 203         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
 204
 205         /* Thermal events */
 206         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 207         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 208         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 209         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 210         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 211
 212         /* AC-related events */
 213         TP_HKEY_EV_AC_CHANGED           = 0x6040, /* AC status changed */
 214
 215         /* Misc */
 216         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 217 };
 218
 219 /****************************************************************************
 220  * Main driver
 221  */
 222
 223 #define TPACPI_NAME "thinkpad"
 224 #define TPACPI_DESC "ThinkPad ACPI Extras"
 225 #define TPACPI_FILE TPACPI_NAME "_acpi"
 226 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 227 #define TPACPI_MAIL "[email protected]"
 228
 229 #define TPACPI_PROC_DIR "ibm"
 230 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 231 #define TPACPI_DRVR_NAME TPACPI_FILE
 232 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 234
 235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 236 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 237
 238 #define TPACPI_MAX_ACPI_ARGS 3
 239
 240 /* Debugging printk groups */
 241 #define TPACPI_DBG_ALL          0xffff
 242 #define TPACPI_DBG_DISCLOSETASK 0x8000
 243 #define TPACPI_DBG_INIT         0x0001
 244 #define TPACPI_DBG_EXIT         0x0002
 245 #define TPACPI_DBG_RFKILL       0x0004
 246 #define TPACPI_DBG_HKEY         0x0008
 247 #define TPACPI_DBG_FAN          0x0010
 248 #define TPACPI_DBG_BRGHT        0x0020
 249 #define TPACPI_DBG_MIXER        0x0040
 250
 251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 254
 255
 256 /****************************************************************************
 257  * Driver-wide structs and misc. variables
 258  */
 259
 260 struct ibm_struct;
 261
 262 struct tp_acpi_drv_struct {
 263         const struct acpi_device_id *hid;
 264         struct acpi_driver *driver;
 265
 266         void (*notify) (struct ibm_struct *, u32);
 267         acpi_handle *handle;
 268         u32 type;
 269         struct acpi_device *device;
 270 };
 271
 272 struct ibm_struct {
 273         char *name;
 274
 275         int (*read) (struct seq_file *);
 276         int (*write) (char *);
 277         void (*exit) (void);
 278         void (*resume) (void);
 279         void (*suspend) (void);
 280         void (*shutdown) (void);
 281
 282         struct list_head all_drivers;
 283
 284         struct tp_acpi_drv_struct *acpi;
 285
 286         struct {
 287                 u8 acpi_driver_registered:1;
 288                 u8 acpi_notify_installed:1;
 289                 u8 proc_created:1;
 290                 u8 init_called:1;
 291                 u8 experimental:1;
 292         } flags;
 293 };
 294
 295 struct ibm_init_struct {
 296         char param[32];
 297
 298         int (*init) (struct ibm_init_struct *);
 299         umode_t base_procfs_mode;
 300         struct ibm_struct *data;
 301 };
 302
 303 static struct {
 304         u32 bluetooth:1;
 305         u32 hotkey:1;
 306         u32 hotkey_mask:1;
 307         u32 hotkey_wlsw:1;
 308         u32 hotkey_tablet:1;
 309         u32 light:1;
 310         u32 light_status:1;
 311         u32 bright_acpimode:1;
 312         u32 bright_unkfw:1;
 313         u32 wan:1;
 314         u32 uwb:1;
 315         u32 fan_ctrl_status_undef:1;
 316         u32 second_fan:1;
 317         u32 beep_needs_two_args:1;
 318         u32 mixer_no_level_control:1;
 319         u32 input_device_registered:1;
 320         u32 platform_drv_registered:1;
 321         u32 platform_drv_attrs_registered:1;
 322         u32 sensors_pdrv_registered:1;
 323         u32 sensors_pdrv_attrs_registered:1;
 324         u32 sensors_pdev_attrs_registered:1;
 325         u32 hotkey_poll_active:1;
 326 } tp_features;
 327
 328 static struct {
 329         u16 hotkey_mask_ff:1;
 330         u16 volume_ctrl_forbidden:1;
 331 } tp_warned;
 332
 333 struct thinkpad_id_data {
 334         unsigned int vendor;    /* ThinkPad vendor:
 335                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 336
 337         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 338         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 339
 340         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 341         u16 ec_model;
 342         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 343         u16 ec_release;
 344
 345         char *model_str;        /* ThinkPad T43 */
 346         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 347 };
 348 static struct thinkpad_id_data thinkpad_id;
 349
 350 static enum {
 351         TPACPI_LIFE_INIT = 0,
 352         TPACPI_LIFE_RUNNING,
 353         TPACPI_LIFE_EXITING,
 354 } tpacpi_lifecycle;
 355
 356 static int experimental;
 357 static u32 dbg_level;
 358
 359 static struct workqueue_struct *tpacpi_wq;
 360
 361 enum led_status_t {
 362         TPACPI_LED_OFF = 0,
 363         TPACPI_LED_ON,
 364         TPACPI_LED_BLINK,
 365 };
 366
 367 /* Special LED class that can defer work */
 368 struct tpacpi_led_classdev {
 369         struct led_classdev led_classdev;
 370         struct work_struct work;
 371         enum led_status_t new_state;
 372         unsigned int led;
 373 };
 374
 375 /* brightness level capabilities */
 376 static unsigned int bright_maxlvl;      /* 0 = unknown */
 377
 378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 379 static int dbg_wlswemul;
 380 static bool tpacpi_wlsw_emulstate;
 381 static int dbg_bluetoothemul;
 382 static bool tpacpi_bluetooth_emulstate;
 383 static int dbg_wwanemul;
 384 static bool tpacpi_wwan_emulstate;
 385 static int dbg_uwbemul;
 386 static bool tpacpi_uwb_emulstate;
 387 #endif
 388
 389
 390 /*************************************************************************
 391  *  Debugging helpers
 392  */
 393
 394 #define dbg_printk(a_dbg_level, format, arg...)                         \
 395 do {                                                                    \
 396         if (dbg_level & (a_dbg_level))                                  \
 397                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 398                        __func__, ##arg);                                \
 399 } while (0)
 400
 401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 402 #define vdbg_printk dbg_printk
 403 static const char *str_supported(int is_supported);
 404 #else
 405 static inline const char *str_supported(int is_supported) { return ""; }
 406 #define vdbg_printk(a_dbg_level, format, arg...)        \
 407         no_printk(format, ##arg)
 408 #endif
 409
 410 static void tpacpi_log_usertask(const char * const what)
 411 {
 412         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 413                what, task_tgid_vnr(current));
 414 }
 415
 416 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 417 do {                                                                    \
 418         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 419                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 420                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 421                        what, task_tgid_vnr(current), ## arg);           \
 422         }                                                               \
 423 } while (0)
 424
 425 /*
 426  * Quirk handling helpers
 427  *
 428  * ThinkPad IDs and versions seen in the field so far
 429  * are two-characters from the set [0-9A-Z], i.e. base 36.
 430  *
 431  * We use values well outside that range as specials.
 432  */
 433
 434 #define TPACPI_MATCH_ANY                0xffffU
 435 #define TPACPI_MATCH_UNKNOWN            0U
 436
 437 /* TPID('1', 'Y') == 0x5931 */
 438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 439
 440 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 441         { .vendor = PCI_VENDOR_ID_IBM,          \
 442           .bios = TPID(__id1, __id2),           \
 443           .ec = TPACPI_MATCH_ANY,               \
 444           .quirks = (__quirk) }
 445
 446 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 447         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 448           .bios = TPID(__id1, __id2),           \
 449           .ec = TPACPI_MATCH_ANY,               \
 450           .quirks = (__quirk) }
 451
 452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 453         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 454           .bios = TPACPI_MATCH_ANY,             \
 455           .ec = TPID(__id1, __id2),             \
 456           .quirks = (__quirk) }
 457
 458 struct tpacpi_quirk {
 459         unsigned int vendor;
 460         u16 bios;
 461         u16 ec;
 462         unsigned long quirks;
 463 };
 464
 465 /**
 466  * tpacpi_check_quirks() - search BIOS/EC version on a list
 467  * @qlist:              array of &struct tpacpi_quirk
 468  * @qlist_size:         number of elements in @qlist
 469  *
 470  * Iterates over a quirks list until one is found that matches the
 471  * ThinkPad's vendor, BIOS and EC model.
 472  *
 473  * Returns 0 if nothing matches, otherwise returns the quirks field of
 474  * the matching &struct tpacpi_quirk entry.
 475  *
 476  * The match criteria is: vendor, ec and bios much match.
 477  */
 478 static unsigned long __init tpacpi_check_quirks(
 479                         const struct tpacpi_quirk *qlist,
 480                         unsigned int qlist_size)
 481 {
 482         while (qlist_size) {
 483                 if ((qlist->vendor == thinkpad_id.vendor ||
 484                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 485                     (qlist->bios == thinkpad_id.bios_model ||
 486                                 qlist->bios == TPACPI_MATCH_ANY) &&
 487                     (qlist->ec == thinkpad_id.ec_model ||
 488                                 qlist->ec == TPACPI_MATCH_ANY))
 489                         return qlist->quirks;
 490
 491                 qlist_size--;
 492                 qlist++;
 493         }
 494         return 0;
 495 }
 496
 497 static inline bool __pure __init tpacpi_is_lenovo(void)
 498 {
 499         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 500 }
 501
 502 static inline bool __pure __init tpacpi_is_ibm(void)
 503 {
 504         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 505 }
 506
 507 /****************************************************************************
 508  ****************************************************************************
 509  *
 510  * ACPI Helpers and device model
 511  *
 512  ****************************************************************************
 513  ****************************************************************************/
 514
 515 /*************************************************************************
 516  * ACPI basic handles
 517  */
 518
 519 static acpi_handle root_handle;
 520 static acpi_handle ec_handle;
 521
 522 #define TPACPI_HANDLE(object, parent, paths...)                 \
 523         static acpi_handle  object##_handle;                    \
 524         static const acpi_handle * const object##_parent __initconst =  \
 525                                                 &parent##_handle; \
 526         static char *object##_paths[] __initdata = { paths }
 527
 528 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 529 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 530
 531 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 532                                         /* T4x, X31, X40 */
 533            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 534            "\\CMS",             /* R40, R40e */
 535            );                   /* all others */
 536
 537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 538            "^HKEY",             /* R30, R31 */
 539            "HKEY",              /* all others */
 540            );                   /* 570 */
 541
 542 /*************************************************************************
 543  * ACPI helpers
 544  */
 545
 546 static int acpi_evalf(acpi_handle handle,
 547                       int *res, char *method, char *fmt, ...)
 548 {
 549         char *fmt0 = fmt;
 550         struct acpi_object_list params;
 551         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 552         struct acpi_buffer result, *resultp;
 553         union acpi_object out_obj;
 554         acpi_status status;
 555         va_list ap;
 556         char res_type;
 557         int success;
 558         int quiet;
 559
 560         if (!*fmt) {
 561                 pr_err("acpi_evalf() called with empty format\n");
 562                 return 0;
 563         }
 564
 565         if (*fmt == 'q') {
 566                 quiet = 1;
 567                 fmt++;
 568         } else
 569                 quiet = 0;
 570
 571         res_type = *(fmt++);
 572
 573         params.count = 0;
 574         params.pointer = &in_objs[0];
 575
 576         va_start(ap, fmt);
 577         while (*fmt) {
 578                 char c = *(fmt++);
 579                 switch (c) {
 580                 case 'd':       /* int */
 581                         in_objs[params.count].integer.value = va_arg(ap, int);
 582                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 583                         break;
 584                         /* add more types as needed */
 585                 default:
 586                         pr_err("acpi_evalf() called "
 587                                "with invalid format character '%c'\n", c);
 588                         va_end(ap);
 589                         return 0;
 590                 }
 591         }
 592         va_end(ap);
 593
 594         if (res_type != 'v') {
 595                 result.length = sizeof(out_obj);
 596                 result.pointer = &out_obj;
 597                 resultp = &result;
 598         } else
 599                 resultp = NULL;
 600
 601         status = acpi_evaluate_object(handle, method, &params, resultp);
 602
 603         switch (res_type) {
 604         case 'd':               /* int */
 605                 success = (status == AE_OK &&
 606                            out_obj.type == ACPI_TYPE_INTEGER);
 607                 if (success && res)
 608                         *res = out_obj.integer.value;
 609                 break;
 610         case 'v':               /* void */
 611                 success = status == AE_OK;
 612                 break;
 613                 /* add more types as needed */
 614         default:
 615                 pr_err("acpi_evalf() called "
 616                        "with invalid format character '%c'\n", res_type);
 617                 return 0;
 618         }
 619
 620         if (!success && !quiet)
 621                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 622                        method, fmt0, acpi_format_exception(status));
 623
 624         return success;
 625 }
 626
 627 static int acpi_ec_read(int i, u8 *p)
 628 {
 629         int v;
 630
 631         if (ecrd_handle) {
 632                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 633                         return 0;
 634                 *p = v;
 635         } else {
 636                 if (ec_read(i, p) < 0)
 637                         return 0;
 638         }
 639
 640         return 1;
 641 }
 642
 643 static int acpi_ec_write(int i, u8 v)
 644 {
 645         if (ecwr_handle) {
 646                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 647                         return 0;
 648         } else {
 649                 if (ec_write(i, v) < 0)
 650                         return 0;
 651         }
 652
 653         return 1;
 654 }
 655
 656 static int issue_thinkpad_cmos_command(int cmos_cmd)
 657 {
 658         if (!cmos_handle)
 659                 return -ENXIO;
 660
 661         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 662                 return -EIO;
 663
 664         return 0;
 665 }
 666
 667 /*************************************************************************
 668  * ACPI device model
 669  */
 670
 671 #define TPACPI_ACPIHANDLE_INIT(object) \
 672         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 673                 object##_paths, ARRAY_SIZE(object##_paths))
 674
 675 static void __init drv_acpi_handle_init(const char *name,
 676                            acpi_handle *handle, const acpi_handle parent,
 677                            char **paths, const int num_paths)
 678 {
 679         int i;
 680         acpi_status status;
 681
 682         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 683                 name);
 684
 685         for (i = 0; i < num_paths; i++) {
 686                 status = acpi_get_handle(parent, paths[i], handle);
 687                 if (ACPI_SUCCESS(status)) {
 688                         dbg_printk(TPACPI_DBG_INIT,
 689                                    "Found ACPI handle %s for %s\n",
 690                                    paths[i], name);
 691                         return;
 692                 }
 693         }
 694
 695         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 696                     name);
 697         *handle = NULL;
 698 }
 699
 700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 701                         u32 level, void *context, void **return_value)
 702 {
 703         *(acpi_handle *)return_value = handle;
 704
 705         return AE_CTRL_TERMINATE;
 706 }
 707
 708 static void __init tpacpi_acpi_handle_locate(const char *name,
 709                 const char *hid,
 710                 acpi_handle *handle)
 711 {
 712         acpi_status status;
 713         acpi_handle device_found;
 714
 715         BUG_ON(!name || !hid || !handle);
 716         vdbg_printk(TPACPI_DBG_INIT,
 717                         "trying to locate ACPI handle for %s, using HID %s\n",
 718                         name, hid);
 719
 720         memset(&device_found, 0, sizeof(device_found));
 721         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 722                                   (void *)name, &device_found);
 723
 724         *handle = NULL;
 725
 726         if (ACPI_SUCCESS(status)) {
 727                 *handle = device_found;
 728                 dbg_printk(TPACPI_DBG_INIT,
 729                            "Found ACPI handle for %s\n", name);
 730         } else {
 731                 vdbg_printk(TPACPI_DBG_INIT,
 732                             "Could not locate an ACPI handle for %s: %s\n",
 733                             name, acpi_format_exception(status));
 734         }
 735 }
 736
 737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 738 {
 739         struct ibm_struct *ibm = data;
 740
 741         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 742                 return;
 743
 744         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 745                 return;
 746
 747         ibm->acpi->notify(ibm, event);
 748 }
 749
 750 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 751 {
 752         acpi_status status;
 753         int rc;
 754
 755         BUG_ON(!ibm->acpi);
 756
 757         if (!*ibm->acpi->handle)
 758                 return 0;
 759
 760         vdbg_printk(TPACPI_DBG_INIT,
 761                 "setting up ACPI notify for %s\n", ibm->name);
 762
 763         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 764         if (rc < 0) {
 765                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 766                 return -ENODEV;
 767         }
 768
 769         ibm->acpi->device->driver_data = ibm;
 770         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 771                 TPACPI_ACPI_EVENT_PREFIX,
 772                 ibm->name);
 773
 774         status = acpi_install_notify_handler(*ibm->acpi->handle,
 775                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 776         if (ACPI_FAILURE(status)) {
 777                 if (status == AE_ALREADY_EXISTS) {
 778                         pr_notice("another device driver is already "
 779                                   "handling %s events\n", ibm->name);
 780                 } else {
 781                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 782                                ibm->name, acpi_format_exception(status));
 783                 }
 784                 return -ENODEV;
 785         }
 786         ibm->flags.acpi_notify_installed = 1;
 787         return 0;
 788 }
 789
 790 static int __init tpacpi_device_add(struct acpi_device *device)
 791 {
 792         return 0;
 793 }
 794
 795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 796 {
 797         int rc;
 798
 799         dbg_printk(TPACPI_DBG_INIT,
 800                 "registering %s as an ACPI driver\n", ibm->name);
 801
 802         BUG_ON(!ibm->acpi);
 803
 804         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 805         if (!ibm->acpi->driver) {
 806                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 807                 return -ENOMEM;
 808         }
 809
 810         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 811         ibm->acpi->driver->ids = ibm->acpi->hid;
 812
 813         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 814
 815         rc = acpi_bus_register_driver(ibm->acpi->driver);
 816         if (rc < 0) {
 817                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 818                        ibm->name, rc);
 819                 kfree(ibm->acpi->driver);
 820                 ibm->acpi->driver = NULL;
 821         } else if (!rc)
 822                 ibm->flags.acpi_driver_registered = 1;
 823
 824         return rc;
 825 }
 826
 827
 828 /****************************************************************************
 829  ****************************************************************************
 830  *
 831  * Procfs Helpers
 832  *
 833  ****************************************************************************
 834  ****************************************************************************/
 835
 836 static int dispatch_proc_show(struct seq_file *m, void *v)
 837 {
 838         struct ibm_struct *ibm = m->private;
 839
 840         if (!ibm || !ibm->read)
 841                 return -EINVAL;
 842         return ibm->read(m);
 843 }
 844
 845 static int dispatch_proc_open(struct inode *inode, struct file *file)
 846 {
 847         return single_open(file, dispatch_proc_show, PDE_DATA(inode));
 848 }
 849
 850 static ssize_t dispatch_proc_write(struct file *file,
 851                         const char __user *userbuf,
 852                         size_t count, loff_t *pos)
 853 {
 854         struct ibm_struct *ibm = PDE_DATA(file_inode(file));
 855         char *kernbuf;
 856         int ret;
 857
 858         if (!ibm || !ibm->write)
 859                 return -EINVAL;
 860         if (count > PAGE_SIZE - 2)
 861                 return -EINVAL;
 862
 863         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 864         if (!kernbuf)
 865                 return -ENOMEM;
 866
 867         if (copy_from_user(kernbuf, userbuf, count)) {
 868                 kfree(kernbuf);
 869                 return -EFAULT;
 870         }
 871
 872         kernbuf[count] = 0;
 873         strcat(kernbuf, ",");
 874         ret = ibm->write(kernbuf);
 875         if (ret == 0)
 876                 ret = count;
 877
 878         kfree(kernbuf);
 879
 880         return ret;
 881 }
 882
 883 static const struct file_operations dispatch_proc_fops = {
 884         .owner          = THIS_MODULE,
 885         .open           = dispatch_proc_open,
 886         .read           = seq_read,
 887         .llseek         = seq_lseek,
 888         .release        = single_release,
 889         .write          = dispatch_proc_write,
 890 };
 891
 892 static char *next_cmd(char **cmds)
 893 {
 894         char *start = *cmds;
 895         char *end;
 896
 897         while ((end = strchr(start, ',')) && end == start)
 898                 start = end + 1;
 899
 900         if (!end)
 901                 return NULL;
 902
 903         *end = 0;
 904         *cmds = end + 1;
 905         return start;
 906 }
 907
 908
 909 /****************************************************************************
 910  ****************************************************************************
 911  *
 912  * Device model: input, hwmon and platform
 913  *
 914  ****************************************************************************
 915  ****************************************************************************/
 916
 917 static struct platform_device *tpacpi_pdev;
 918 static struct platform_device *tpacpi_sensors_pdev;
 919 static struct device *tpacpi_hwmon;
 920 static struct input_dev *tpacpi_inputdev;
 921 static struct mutex tpacpi_inputdev_send_mutex;
 922 static LIST_HEAD(tpacpi_all_drivers);
 923
 924 #ifdef CONFIG_PM_SLEEP
 925 static int tpacpi_suspend_handler(struct device *dev)
 926 {
 927         struct ibm_struct *ibm, *itmp;
 928
 929         list_for_each_entry_safe(ibm, itmp,
 930                                  &tpacpi_all_drivers,
 931                                  all_drivers) {
 932                 if (ibm->suspend)
 933                         (ibm->suspend)();
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int tpacpi_resume_handler(struct device *dev)
 940 {
 941         struct ibm_struct *ibm, *itmp;
 942
 943         list_for_each_entry_safe(ibm, itmp,
 944                                  &tpacpi_all_drivers,
 945                                  all_drivers) {
 946                 if (ibm->resume)
 947                         (ibm->resume)();
 948         }
 949
 950         return 0;
 951 }
 952 #endif
 953
 954 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
 955                          tpacpi_suspend_handler, tpacpi_resume_handler);
 956
 957 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 958 {
 959         struct ibm_struct *ibm, *itmp;
 960
 961         list_for_each_entry_safe(ibm, itmp,
 962                                  &tpacpi_all_drivers,
 963                                  all_drivers) {
 964                 if (ibm->shutdown)
 965                         (ibm->shutdown)();
 966         }
 967 }
 968
 969 static struct platform_driver tpacpi_pdriver = {
 970         .driver = {
 971                 .name = TPACPI_DRVR_NAME,
 972                 .owner = THIS_MODULE,
 973                 .pm = &tpacpi_pm,
 974         },
 975         .shutdown = tpacpi_shutdown_handler,
 976 };
 977
 978 static struct platform_driver tpacpi_hwmon_pdriver = {
 979         .driver = {
 980                 .name = TPACPI_HWMON_DRVR_NAME,
 981                 .owner = THIS_MODULE,
 982         },
 983 };
 984
 985 /*************************************************************************
 986  * sysfs support helpers
 987  */
 988
 989 struct attribute_set {
 990         unsigned int members, max_members;
 991         struct attribute_group group;
 992 };
 993
 994 struct attribute_set_obj {
 995         struct attribute_set s;
 996         struct attribute *a;
 997 } __attribute__((packed));
 998
 999 static struct attribute_set *create_attr_set(unsigned int max_members,
1000                                                 const char *name)
1001 {
1002         struct attribute_set_obj *sobj;
1003
1004         if (max_members == 0)
1005                 return NULL;
1006
1007         /* Allocates space for implicit NULL at the end too */
1008         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1009                     max_members * sizeof(struct attribute *),
1010                     GFP_KERNEL);
1011         if (!sobj)
1012                 return NULL;
1013         sobj->s.max_members = max_members;
1014         sobj->s.group.attrs = &sobj->a;
1015         sobj->s.group.name = name;
1016
1017         return &sobj->s;
1018 }
1019
1020 #define destroy_attr_set(_set) \
1021         kfree(_set);
1022
1023 /* not multi-threaded safe, use it in a single thread per set */
1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1025 {
1026         if (!s || !attr)
1027                 return -EINVAL;
1028
1029         if (s->members >= s->max_members)
1030                 return -ENOMEM;
1031
1032         s->group.attrs[s->members] = attr;
1033         s->members++;
1034
1035         return 0;
1036 }
1037
1038 static int add_many_to_attr_set(struct attribute_set *s,
1039                         struct attribute **attr,
1040                         unsigned int count)
1041 {
1042         int i, res;
1043
1044         for (i = 0; i < count; i++) {
1045                 res = add_to_attr_set(s, attr[i]);
1046                 if (res)
1047                         return res;
1048         }
1049
1050         return 0;
1051 }
1052
1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1054 {
1055         sysfs_remove_group(kobj, &s->group);
1056         destroy_attr_set(s);
1057 }
1058
1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1060         sysfs_create_group(_kobj, &_attr_set->group)
1061
1062 static int parse_strtoul(const char *buf,
1063                 unsigned long max, unsigned long *value)
1064 {
1065         char *endp;
1066
1067         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1068         endp = skip_spaces(endp);
1069         if (*endp || *value > max)
1070                 return -EINVAL;
1071
1072         return 0;
1073 }
1074
1075 static void tpacpi_disable_brightness_delay(void)
1076 {
1077         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1078                 pr_notice("ACPI backlight control delay disabled\n");
1079 }
1080
1081 static void printk_deprecated_attribute(const char * const what,
1082                                         const char * const details)
1083 {
1084         tpacpi_log_usertask("deprecated sysfs attribute");
1085         pr_warn("WARNING: sysfs attribute %s is deprecated and "
1086                 "will be removed. %s\n",
1087                 what, details);
1088 }
1089
1090 /*************************************************************************
1091  * rfkill and radio control support helpers
1092  */
1093
1094 /*
1095  * ThinkPad-ACPI firmware handling model:
1096  *
1097  * WLSW (master wireless switch) is event-driven, and is common to all
1098  * firmware-controlled radios.  It cannot be controlled, just monitored,
1099  * as expected.  It overrides all radio state in firmware
1100  *
1101  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1102  * (TODO: verify how WLSW interacts with the returned radio state).
1103  *
1104  * The only time there are shadow radio state changes, is when
1105  * masked-off hotkeys are used.
1106  */
1107
1108 /*
1109  * Internal driver API for radio state:
1110  *
1111  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1112  * bool: true means radio blocked (off)
1113  */
1114 enum tpacpi_rfkill_state {
1115         TPACPI_RFK_RADIO_OFF = 0,
1116         TPACPI_RFK_RADIO_ON
1117 };
1118
1119 /* rfkill switches */
1120 enum tpacpi_rfk_id {
1121         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1122         TPACPI_RFK_WWAN_SW_ID,
1123         TPACPI_RFK_UWB_SW_ID,
1124         TPACPI_RFK_SW_MAX
1125 };
1126
1127 static const char *tpacpi_rfkill_names[] = {
1128         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1129         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1130         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1131         [TPACPI_RFK_SW_MAX] = NULL
1132 };
1133
1134 /* ThinkPad-ACPI rfkill subdriver */
1135 struct tpacpi_rfk {
1136         struct rfkill *rfkill;
1137         enum tpacpi_rfk_id id;
1138         const struct tpacpi_rfk_ops *ops;
1139 };
1140
1141 struct tpacpi_rfk_ops {
1142         /* firmware interface */
1143         int (*get_status)(void);
1144         int (*set_status)(const enum tpacpi_rfkill_state);
1145 };
1146
1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1148
1149 /* Query FW and update rfkill sw state for a given rfkill switch */
1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1151 {
1152         int status;
1153
1154         if (!tp_rfk)
1155                 return -ENODEV;
1156
1157         status = (tp_rfk->ops->get_status)();
1158         if (status < 0)
1159                 return status;
1160
1161         rfkill_set_sw_state(tp_rfk->rfkill,
1162                             (status == TPACPI_RFK_RADIO_OFF));
1163
1164         return status;
1165 }
1166
1167 /* Query FW and update rfkill sw state for all rfkill switches */
1168 static void tpacpi_rfk_update_swstate_all(void)
1169 {
1170         unsigned int i;
1171
1172         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1173                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1174 }
1175
1176 /*
1177  * Sync the HW-blocking state of all rfkill switches,
1178  * do notice it causes the rfkill core to schedule uevents
1179  */
1180 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1181 {
1182         unsigned int i;
1183         struct tpacpi_rfk *tp_rfk;
1184
1185         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1186                 tp_rfk = tpacpi_rfkill_switches[i];
1187                 if (tp_rfk) {
1188                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1189                                                 blocked)) {
1190                                 /* ignore -- we track sw block */
1191                         }
1192                 }
1193         }
1194 }
1195
1196 /* Call to get the WLSW state from the firmware */
1197 static int hotkey_get_wlsw(void);
1198
1199 /* Call to query WLSW state and update all rfkill switches */
1200 static bool tpacpi_rfk_check_hwblock_state(void)
1201 {
1202         int res = hotkey_get_wlsw();
1203         int hw_blocked;
1204
1205         /* When unknown or unsupported, we have to assume it is unblocked */
1206         if (res < 0)
1207                 return false;
1208
1209         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1210         tpacpi_rfk_update_hwblock_state(hw_blocked);
1211
1212         return hw_blocked;
1213 }
1214
1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1216 {
1217         struct tpacpi_rfk *tp_rfk = data;
1218         int res;
1219
1220         dbg_printk(TPACPI_DBG_RFKILL,
1221                    "request to change radio state to %s\n",
1222                    blocked ? "blocked" : "unblocked");
1223
1224         /* try to set radio state */
1225         res = (tp_rfk->ops->set_status)(blocked ?
1226                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1227
1228         /* and update the rfkill core with whatever the FW really did */
1229         tpacpi_rfk_update_swstate(tp_rfk);
1230
1231         return (res < 0) ? res : 0;
1232 }
1233
1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1235         .set_block = tpacpi_rfk_hook_set_block,
1236 };
1237
1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1239                         const struct tpacpi_rfk_ops *tp_rfkops,
1240                         const enum rfkill_type rfktype,
1241                         const char *name,
1242                         const bool set_default)
1243 {
1244         struct tpacpi_rfk *atp_rfk;
1245         int res;
1246         bool sw_state = false;
1247         bool hw_state;
1248         int sw_status;
1249
1250         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1251
1252         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1253         if (atp_rfk)
1254                 atp_rfk->rfkill = rfkill_alloc(name,
1255                                                 &tpacpi_pdev->dev,
1256                                                 rfktype,
1257                                                 &tpacpi_rfk_rfkill_ops,
1258                                                 atp_rfk);
1259         if (!atp_rfk || !atp_rfk->rfkill) {
1260                 pr_err("failed to allocate memory for rfkill class\n");
1261                 kfree(atp_rfk);
1262                 return -ENOMEM;
1263         }
1264
1265         atp_rfk->id = id;
1266         atp_rfk->ops = tp_rfkops;
1267
1268         sw_status = (tp_rfkops->get_status)();
1269         if (sw_status < 0) {
1270                 pr_err("failed to read initial state for %s, error %d\n",
1271                        name, sw_status);
1272         } else {
1273                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1274                 if (set_default) {
1275                         /* try to keep the initial state, since we ask the
1276                          * firmware to preserve it across S5 in NVRAM */
1277                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1278                 }
1279         }
1280         hw_state = tpacpi_rfk_check_hwblock_state();
1281         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1282
1283         res = rfkill_register(atp_rfk->rfkill);
1284         if (res < 0) {
1285                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1286                 rfkill_destroy(atp_rfk->rfkill);
1287                 kfree(atp_rfk);
1288                 return res;
1289         }
1290
1291         tpacpi_rfkill_switches[id] = atp_rfk;
1292
1293         pr_info("rfkill switch %s: radio is %sblocked\n",
1294                 name, (sw_state || hw_state) ? "" : "un");
1295         return 0;
1296 }
1297
1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1299 {
1300         struct tpacpi_rfk *tp_rfk;
1301
1302         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1303
1304         tp_rfk = tpacpi_rfkill_switches[id];
1305         if (tp_rfk) {
1306                 rfkill_unregister(tp_rfk->rfkill);
1307                 rfkill_destroy(tp_rfk->rfkill);
1308                 tpacpi_rfkill_switches[id] = NULL;
1309                 kfree(tp_rfk);
1310         }
1311 }
1312
1313 static void printk_deprecated_rfkill_attribute(const char * const what)
1314 {
1315         printk_deprecated_attribute(what,
1316                         "Please switch to generic rfkill before year 2010");
1317 }
1318
1319 /* sysfs <radio> enable ------------------------------------------------ */
1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1321                                             struct device_attribute *attr,
1322                                             char *buf)
1323 {
1324         int status;
1325
1326         printk_deprecated_rfkill_attribute(attr->attr.name);
1327
1328         /* This is in the ABI... */
1329         if (tpacpi_rfk_check_hwblock_state()) {
1330                 status = TPACPI_RFK_RADIO_OFF;
1331         } else {
1332                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1333                 if (status < 0)
1334                         return status;
1335         }
1336
1337         return snprintf(buf, PAGE_SIZE, "%d\n",
1338                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1339 }
1340
1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1342                             struct device_attribute *attr,
1343                             const char *buf, size_t count)
1344 {
1345         unsigned long t;
1346         int res;
1347
1348         printk_deprecated_rfkill_attribute(attr->attr.name);
1349
1350         if (parse_strtoul(buf, 1, &t))
1351                 return -EINVAL;
1352
1353         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1354
1355         /* This is in the ABI... */
1356         if (tpacpi_rfk_check_hwblock_state() && !!t)
1357                 return -EPERM;
1358
1359         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1360                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1361         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1362
1363         return (res < 0) ? res : count;
1364 }
1365
1366 /* procfs -------------------------------------------------------------- */
1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1368 {
1369         if (id >= TPACPI_RFK_SW_MAX)
1370                 seq_printf(m, "status:\t\tnot supported\n");
1371         else {
1372                 int status;
1373
1374                 /* This is in the ABI... */
1375                 if (tpacpi_rfk_check_hwblock_state()) {
1376                         status = TPACPI_RFK_RADIO_OFF;
1377                 } else {
1378                         status = tpacpi_rfk_update_swstate(
1379                                                 tpacpi_rfkill_switches[id]);
1380                         if (status < 0)
1381                                 return status;
1382                 }
1383
1384                 seq_printf(m, "status:\t\t%s\n",
1385                                 (status == TPACPI_RFK_RADIO_ON) ?
1386                                         "enabled" : "disabled");
1387                 seq_printf(m, "commands:\tenable, disable\n");
1388         }
1389
1390         return 0;
1391 }
1392
1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1394 {
1395         char *cmd;
1396         int status = -1;
1397         int res = 0;
1398
1399         if (id >= TPACPI_RFK_SW_MAX)
1400                 return -ENODEV;
1401
1402         while ((cmd = next_cmd(&buf))) {
1403                 if (strlencmp(cmd, "enable") == 0)
1404                         status = TPACPI_RFK_RADIO_ON;
1405                 else if (strlencmp(cmd, "disable") == 0)
1406                         status = TPACPI_RFK_RADIO_OFF;
1407                 else
1408                         return -EINVAL;
1409         }
1410
1411         if (status != -1) {
1412                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1413                                 (status == TPACPI_RFK_RADIO_ON) ?
1414                                                 "enable" : "disable",
1415                                 tpacpi_rfkill_names[id]);
1416                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1417                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1418         }
1419
1420         return res;
1421 }
1422
1423 /*************************************************************************
1424  * thinkpad-acpi driver attributes
1425  */
1426
1427 /* interface_version --------------------------------------------------- */
1428 static ssize_t tpacpi_driver_interface_version_show(
1429                                 struct device_driver *drv,
1430                                 char *buf)
1431 {
1432         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1433 }
1434
1435 static DRIVER_ATTR(interface_version, S_IRUGO,
1436                 tpacpi_driver_interface_version_show, NULL);
1437
1438 /* debug_level --------------------------------------------------------- */
1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1440                                                 char *buf)
1441 {
1442         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1443 }
1444
1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1446                                                 const char *buf, size_t count)
1447 {
1448         unsigned long t;
1449
1450         if (parse_strtoul(buf, 0xffff, &t))
1451                 return -EINVAL;
1452
1453         dbg_level = t;
1454
1455         return count;
1456 }
1457
1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1459                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1460
1461 /* version ------------------------------------------------------------- */
1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1463                                                 char *buf)
1464 {
1465         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1466                         TPACPI_DESC, TPACPI_VERSION);
1467 }
1468
1469 static DRIVER_ATTR(version, S_IRUGO,
1470                 tpacpi_driver_version_show, NULL);
1471
1472 /* --------------------------------------------------------------------- */
1473
1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1475
1476 /* wlsw_emulstate ------------------------------------------------------ */
1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1478                                                 char *buf)
1479 {
1480         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1481 }
1482
1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1484                                                 const char *buf, size_t count)
1485 {
1486         unsigned long t;
1487
1488         if (parse_strtoul(buf, 1, &t))
1489                 return -EINVAL;
1490
1491         if (tpacpi_wlsw_emulstate != !!t) {
1492                 tpacpi_wlsw_emulstate = !!t;
1493                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1494         }
1495
1496         return count;
1497 }
1498
1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1500                 tpacpi_driver_wlsw_emulstate_show,
1501                 tpacpi_driver_wlsw_emulstate_store);
1502
1503 /* bluetooth_emulstate ------------------------------------------------- */
1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1505                                         struct device_driver *drv,
1506                                         char *buf)
1507 {
1508         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1509 }
1510
1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1512                                         struct device_driver *drv,
1513                                         const char *buf, size_t count)
1514 {
1515         unsigned long t;
1516
1517         if (parse_strtoul(buf, 1, &t))
1518                 return -EINVAL;
1519
1520         tpacpi_bluetooth_emulstate = !!t;
1521
1522         return count;
1523 }
1524
1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1526                 tpacpi_driver_bluetooth_emulstate_show,
1527                 tpacpi_driver_bluetooth_emulstate_store);
1528
1529 /* wwan_emulstate ------------------------------------------------- */
1530 static ssize_t tpacpi_driver_wwan_emulstate_show(
1531                                         struct device_driver *drv,
1532                                         char *buf)
1533 {
1534         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1535 }
1536
1537 static ssize_t tpacpi_driver_wwan_emulstate_store(
1538                                         struct device_driver *drv,
1539                                         const char *buf, size_t count)
1540 {
1541         unsigned long t;
1542
1543         if (parse_strtoul(buf, 1, &t))
1544                 return -EINVAL;
1545
1546         tpacpi_wwan_emulstate = !!t;
1547
1548         return count;
1549 }
1550
1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1552                 tpacpi_driver_wwan_emulstate_show,
1553                 tpacpi_driver_wwan_emulstate_store);
1554
1555 /* uwb_emulstate ------------------------------------------------- */
1556 static ssize_t tpacpi_driver_uwb_emulstate_show(
1557                                         struct device_driver *drv,
1558                                         char *buf)
1559 {
1560         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1561 }
1562
1563 static ssize_t tpacpi_driver_uwb_emulstate_store(
1564                                         struct device_driver *drv,
1565                                         const char *buf, size_t count)
1566 {
1567         unsigned long t;
1568
1569         if (parse_strtoul(buf, 1, &t))
1570                 return -EINVAL;
1571
1572         tpacpi_uwb_emulstate = !!t;
1573
1574         return count;
1575 }
1576
1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1578                 tpacpi_driver_uwb_emulstate_show,
1579                 tpacpi_driver_uwb_emulstate_store);
1580 #endif
1581
1582 /* --------------------------------------------------------------------- */
1583
1584 static struct driver_attribute *tpacpi_driver_attributes[] = {
1585         &driver_attr_debug_level, &driver_attr_version,
1586         &driver_attr_interface_version,
1587 };
1588
1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1590 {
1591         int i, res;
1592
1593         i = 0;
1594         res = 0;
1595         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1596                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1597                 i++;
1598         }
1599
1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1601         if (!res && dbg_wlswemul)
1602                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1603         if (!res && dbg_bluetoothemul)
1604                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1605         if (!res && dbg_wwanemul)
1606                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1607         if (!res && dbg_uwbemul)
1608                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1609 #endif
1610
1611         return res;
1612 }
1613
1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1615 {
1616         int i;
1617
1618         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1619                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1620
1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1622         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1623         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1624         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1625         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1626 #endif
1627 }
1628
1629 /*************************************************************************
1630  * Firmware Data
1631  */
1632
1633 /*
1634  * Table of recommended minimum BIOS versions
1635  *
1636  * Reasons for listing:
1637  *    1. Stable BIOS, listed because the unknown amount of
1638  *       bugs and bad ACPI behaviour on older versions
1639  *
1640  *    2. BIOS or EC fw with known bugs that trigger on Linux
1641  *
1642  *    3. BIOS with known reduced functionality in older versions
1643  *
1644  *  We recommend the latest BIOS and EC version.
1645  *  We only support the latest BIOS and EC fw version as a rule.
1646  *
1647  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1648  *  Information from users in ThinkWiki
1649  *
1650  *  WARNING: we use this table also to detect that the machine is
1651  *  a ThinkPad in some cases, so don't remove entries lightly.
1652  */
1653
1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1655         { .vendor       = (__v),                        \
1656           .bios         = TPID(__id1, __id2),           \
1657           .ec           = TPACPI_MATCH_ANY,             \
1658           .quirks       = TPACPI_MATCH_ANY << 16        \
1659                           | (__bv1) << 8 | (__bv2) }
1660
1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1662                 __eid, __ev1, __ev2)                    \
1663         { .vendor       = (__v),                        \
1664           .bios         = TPID(__bid1, __bid2),         \
1665           .ec           = __eid,                        \
1666           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1667                           | (__bv1) << 8 | (__bv2) }
1668
1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1670         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1671
1672 /* Outdated IBM BIOSes often lack the EC id string */
1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1674         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1675                 __bv1, __bv2, TPID(__id1, __id2),       \
1676                 __ev1, __ev2),                          \
1677         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1678                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1679                 __ev1, __ev2)
1680
1681 /* Outdated IBM BIOSes often lack the EC id string */
1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1683                 __eid1, __eid2, __ev1, __ev2)           \
1684         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1685                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1686                 __ev1, __ev2),                          \
1687         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1688                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1689                 __ev1, __ev2)
1690
1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1692         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1693
1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1696                 __bv1, __bv2, TPID(__id1, __id2),       \
1697                 __ev1, __ev2)
1698
1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1700                 __eid1, __eid2, __ev1, __ev2)           \
1701         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1702                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1703                 __ev1, __ev2)
1704
1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1706         /*  Numeric models ------------------ */
1707         /*      FW MODEL   BIOS VERS          */
1708         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1709         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1710         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1711         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1712         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1713         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1714         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1715         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1716         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1717
1718         /* A-series ------------------------- */
1719         /*      FW MODEL   BIOS VERS  EC VERS */
1720         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1721         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1722         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1723         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1724         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1725         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1726         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1727         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1728         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1729         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1730         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1731
1732         /* G-series ------------------------- */
1733         /*      FW MODEL   BIOS VERS          */
1734         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1735         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1736
1737         /* R-series, T-series --------------- */
1738         /*      FW MODEL   BIOS VERS  EC VERS */
1739         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1740         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1741         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1742         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1743         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1744         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1745         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1746                                                     T40/p, T41/p, T42/p (1) */
1747         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1748         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1749         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1750         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1751
1752         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1753         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1754         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1755         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1756         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1757         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1758
1759         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1760         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1761         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1762
1763         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1764         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1765         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1766
1767         /* X-series ------------------------- */
1768         /*      FW MODEL   BIOS VERS  EC VERS */
1769         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1770         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1771         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1772         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1773         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1774         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1775         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1776
1777         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1778         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1779
1780         /* (0) - older versions lack DMI EC fw string and functionality */
1781         /* (1) - older versions known to lack functionality */
1782 };
1783
1784 #undef TPV_QL1
1785 #undef TPV_QL0
1786 #undef TPV_QI2
1787 #undef TPV_QI1
1788 #undef TPV_QI0
1789 #undef TPV_Q_X
1790 #undef TPV_Q
1791
1792 static void __init tpacpi_check_outdated_fw(void)
1793 {
1794         unsigned long fwvers;
1795         u16 ec_version, bios_version;
1796
1797         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1798                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1799
1800         if (!fwvers)
1801                 return;
1802
1803         bios_version = fwvers & 0xffffU;
1804         ec_version = (fwvers >> 16) & 0xffffU;
1805
1806         /* note that unknown versions are set to 0x0000 and we use that */
1807         if ((bios_version > thinkpad_id.bios_release) ||
1808             (ec_version > thinkpad_id.ec_release &&
1809                                 ec_version != TPACPI_MATCH_ANY)) {
1810                 /*
1811                  * The changelogs would let us track down the exact
1812                  * reason, but it is just too much of a pain to track
1813                  * it.  We only list BIOSes that are either really
1814                  * broken, or really stable to begin with, so it is
1815                  * best if the user upgrades the firmware anyway.
1816                  */
1817                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1818                 pr_warn("WARNING: This firmware may be missing critical bug "
1819                         "fixes and/or important features\n");
1820         }
1821 }
1822
1823 static bool __init tpacpi_is_fw_known(void)
1824 {
1825         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1826                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1827 }
1828
1829 /****************************************************************************
1830  ****************************************************************************
1831  *
1832  * Subdrivers
1833  *
1834  ****************************************************************************
1835  ****************************************************************************/
1836
1837 /*************************************************************************
1838  * thinkpad-acpi metadata subdriver
1839  */
1840
1841 static int thinkpad_acpi_driver_read(struct seq_file *m)
1842 {
1843         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1844         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1845         return 0;
1846 }
1847
1848 static struct ibm_struct thinkpad_acpi_driver_data = {
1849         .name = "driver",
1850         .read = thinkpad_acpi_driver_read,
1851 };
1852
1853 /*************************************************************************
1854  * Hotkey subdriver
1855  */
1856
1857 /*
1858  * ThinkPad firmware event model
1859  *
1860  * The ThinkPad firmware has two main event interfaces: normal ACPI
1861  * notifications (which follow the ACPI standard), and a private event
1862  * interface.
1863  *
1864  * The private event interface also issues events for the hotkeys.  As
1865  * the driver gained features, the event handling code ended up being
1866  * built around the hotkey subdriver.  This will need to be refactored
1867  * to a more formal event API eventually.
1868  *
1869  * Some "hotkeys" are actually supposed to be used as event reports,
1870  * such as "brightness has changed", "volume has changed", depending on
1871  * the ThinkPad model and how the firmware is operating.
1872  *
1873  * Unlike other classes, hotkey-class events have mask/unmask control on
1874  * non-ancient firmware.  However, how it behaves changes a lot with the
1875  * firmware model and version.
1876  */
1877
1878 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1879         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1880         TP_ACPI_HOTKEYSCAN_FNF2,
1881         TP_ACPI_HOTKEYSCAN_FNF3,
1882         TP_ACPI_HOTKEYSCAN_FNF4,
1883         TP_ACPI_HOTKEYSCAN_FNF5,
1884         TP_ACPI_HOTKEYSCAN_FNF6,
1885         TP_ACPI_HOTKEYSCAN_FNF7,
1886         TP_ACPI_HOTKEYSCAN_FNF8,
1887         TP_ACPI_HOTKEYSCAN_FNF9,
1888         TP_ACPI_HOTKEYSCAN_FNF10,
1889         TP_ACPI_HOTKEYSCAN_FNF11,
1890         TP_ACPI_HOTKEYSCAN_FNF12,
1891         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1892         TP_ACPI_HOTKEYSCAN_FNINSERT,
1893         TP_ACPI_HOTKEYSCAN_FNDELETE,
1894         TP_ACPI_HOTKEYSCAN_FNHOME,
1895         TP_ACPI_HOTKEYSCAN_FNEND,
1896         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1897         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1898         TP_ACPI_HOTKEYSCAN_FNSPACE,
1899         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1900         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1901         TP_ACPI_HOTKEYSCAN_MUTE,
1902         TP_ACPI_HOTKEYSCAN_THINKPAD,
1903         TP_ACPI_HOTKEYSCAN_UNK1,
1904         TP_ACPI_HOTKEYSCAN_UNK2,
1905         TP_ACPI_HOTKEYSCAN_UNK3,
1906         TP_ACPI_HOTKEYSCAN_UNK4,
1907         TP_ACPI_HOTKEYSCAN_UNK5,
1908         TP_ACPI_HOTKEYSCAN_UNK6,
1909         TP_ACPI_HOTKEYSCAN_UNK7,
1910         TP_ACPI_HOTKEYSCAN_UNK8,
1911
1912         /* Hotkey keymap size */
1913         TPACPI_HOTKEY_MAP_LEN
1914 };
1915
1916 enum {  /* Keys/events available through NVRAM polling */
1917         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1918         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1919 };
1920
1921 enum {  /* Positions of some of the keys in hotkey masks */
1922         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1923         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1924         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1925         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1926         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1927         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1928         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1929         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1930         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1931         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1932         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1933 };
1934
1935 enum {  /* NVRAM to ACPI HKEY group map */
1936         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1937                                           TP_ACPI_HKEY_ZOOM_MASK |
1938                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1939                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1940         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1941                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1942         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1943                                           TP_ACPI_HKEY_VOLDWN_MASK |
1944                                           TP_ACPI_HKEY_MUTE_MASK,
1945 };
1946
1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1948 struct tp_nvram_state {
1949        u16 thinkpad_toggle:1;
1950        u16 zoom_toggle:1;
1951        u16 display_toggle:1;
1952        u16 thinklight_toggle:1;
1953        u16 hibernate_toggle:1;
1954        u16 displayexp_toggle:1;
1955        u16 display_state:1;
1956        u16 brightness_toggle:1;
1957        u16 volume_toggle:1;
1958        u16 mute:1;
1959
1960        u8 brightness_level;
1961        u8 volume_level;
1962 };
1963
1964 /* kthread for the hotkey poller */
1965 static struct task_struct *tpacpi_hotkey_task;
1966
1967 /*
1968  * Acquire mutex to write poller control variables as an
1969  * atomic block.
1970  *
1971  * Increment hotkey_config_change when changing them if you
1972  * want the kthread to forget old state.
1973  *
1974  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1975  */
1976 static struct mutex hotkey_thread_data_mutex;
1977 static unsigned int hotkey_config_change;
1978
1979 /*
1980  * hotkey poller control variables
1981  *
1982  * Must be atomic or readers will also need to acquire mutex
1983  *
1984  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1985  * should be used only when the changes need to be taken as
1986  * a block, OR when one needs to force the kthread to forget
1987  * old state.
1988  */
1989 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1990 static unsigned int hotkey_poll_freq = 10; /* Hz */
1991
1992 #define HOTKEY_CONFIG_CRITICAL_START \
1993         do { \
1994                 mutex_lock(&hotkey_thread_data_mutex); \
1995                 hotkey_config_change++; \
1996         } while (0);
1997 #define HOTKEY_CONFIG_CRITICAL_END \
1998         mutex_unlock(&hotkey_thread_data_mutex);
1999
2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2001
2002 #define hotkey_source_mask 0U
2003 #define HOTKEY_CONFIG_CRITICAL_START
2004 #define HOTKEY_CONFIG_CRITICAL_END
2005
2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2007
2008 static struct mutex hotkey_mutex;
2009
2010 static enum {   /* Reasons for waking up */
2011         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2012         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2013         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2014 } hotkey_wakeup_reason;
2015
2016 static int hotkey_autosleep_ack;
2017
2018 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2019 static u32 hotkey_all_mask;             /* all events supported in fw */
2020 static u32 hotkey_reserved_mask;        /* events better left disabled */
2021 static u32 hotkey_driver_mask;          /* events needed by the driver */
2022 static u32 hotkey_user_mask;            /* events visible to userspace */
2023 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2024
2025 static unsigned int hotkey_report_mode;
2026
2027 static u16 *hotkey_keycode_map;
2028
2029 static struct attribute_set *hotkey_dev_attributes;
2030
2031 static void tpacpi_driver_event(const unsigned int hkey_event);
2032 static void hotkey_driver_event(const unsigned int scancode);
2033 static void hotkey_poll_setup(const bool may_warn);
2034
2035 /* HKEY.MHKG() return bits */
2036 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2037
2038 static int hotkey_get_wlsw(void)
2039 {
2040         int status;
2041
2042         if (!tp_features.hotkey_wlsw)
2043                 return -ENODEV;
2044
2045 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2046         if (dbg_wlswemul)
2047                 return (tpacpi_wlsw_emulstate) ?
2048                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2049 #endif
2050
2051         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2052                 return -EIO;
2053
2054         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2055 }
2056
2057 static int hotkey_get_tablet_mode(int *status)
2058 {
2059         int s;
2060
2061         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2062                 return -EIO;
2063
2064         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2065         return 0;
2066 }
2067
2068 /*
2069  * Reads current event mask from firmware, and updates
2070  * hotkey_acpi_mask accordingly.  Also resets any bits
2071  * from hotkey_user_mask that are unavailable to be
2072  * delivered (shadow requirement of the userspace ABI).
2073  *
2074  * Call with hotkey_mutex held
2075  */
2076 static int hotkey_mask_get(void)
2077 {
2078         if (tp_features.hotkey_mask) {
2079                 u32 m = 0;
2080
2081                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2082                         return -EIO;
2083
2084                 hotkey_acpi_mask = m;
2085         } else {
2086                 /* no mask support doesn't mean no event support... */
2087                 hotkey_acpi_mask = hotkey_all_mask;
2088         }
2089
2090         /* sync userspace-visible mask */
2091         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2092
2093         return 0;
2094 }
2095
2096 void static hotkey_mask_warn_incomplete_mask(void)
2097 {
2098         /* log only what the user can fix... */
2099         const u32 wantedmask = hotkey_driver_mask &
2100                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2101                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2102
2103         if (wantedmask)
2104                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2105 }
2106
2107 /*
2108  * Set the firmware mask when supported
2109  *
2110  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2111  *
2112  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2113  *
2114  * Call with hotkey_mutex held
2115  */
2116 static int hotkey_mask_set(u32 mask)
2117 {
2118         int i;
2119         int rc = 0;
2120
2121         const u32 fwmask = mask & ~hotkey_source_mask;
2122
2123         if (tp_features.hotkey_mask) {
2124                 for (i = 0; i < 32; i++) {
2125                         if (!acpi_evalf(hkey_handle,
2126                                         NULL, "MHKM", "vdd", i + 1,
2127                                         !!(mask & (1 << i)))) {
2128                                 rc = -EIO;
2129                                 break;
2130                         }
2131                 }
2132         }
2133
2134         /*
2135          * We *must* make an inconditional call to hotkey_mask_get to
2136          * refresh hotkey_acpi_mask and update hotkey_user_mask
2137          *
2138          * Take the opportunity to also log when we cannot _enable_
2139          * a given event.
2140          */
2141         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2142                 pr_notice("asked for hotkey mask 0x%08x, but "
2143                           "firmware forced it to 0x%08x\n",
2144                           fwmask, hotkey_acpi_mask);
2145         }
2146
2147         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2148                 hotkey_mask_warn_incomplete_mask();
2149
2150         return rc;
2151 }
2152
2153 /*
2154  * Sets hotkey_user_mask and tries to set the firmware mask
2155  *
2156  * Call with hotkey_mutex held
2157  */
2158 static int hotkey_user_mask_set(const u32 mask)
2159 {
2160         int rc;
2161
2162         /* Give people a chance to notice they are doing something that
2163          * is bound to go boom on their users sooner or later */
2164         if (!tp_warned.hotkey_mask_ff &&
2165             (mask == 0xffff || mask == 0xffffff ||
2166              mask == 0xffffffff)) {
2167                 tp_warned.hotkey_mask_ff = 1;
2168                 pr_notice("setting the hotkey mask to 0x%08x is likely "
2169                           "not the best way to go about it\n", mask);
2170                 pr_notice("please consider using the driver defaults, "
2171                           "and refer to up-to-date thinkpad-acpi "
2172                           "documentation\n");
2173         }
2174
2175         /* Try to enable what the user asked for, plus whatever we need.
2176          * this syncs everything but won't enable bits in hotkey_user_mask */
2177         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2178
2179         /* Enable the available bits in hotkey_user_mask */
2180         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2181
2182         return rc;
2183 }
2184
2185 /*
2186  * Sets the driver hotkey mask.
2187  *
2188  * Can be called even if the hotkey subdriver is inactive
2189  */
2190 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2191 {
2192         int rc;
2193
2194         /* Do the right thing if hotkey_init has not been called yet */
2195         if (!tp_features.hotkey) {
2196                 hotkey_driver_mask = mask;
2197                 return 0;
2198         }
2199
2200         mutex_lock(&hotkey_mutex);
2201
2202         HOTKEY_CONFIG_CRITICAL_START
2203         hotkey_driver_mask = mask;
2204 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2205         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2206 #endif
2207         HOTKEY_CONFIG_CRITICAL_END
2208
2209         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2210                                                         ~hotkey_source_mask);
2211         hotkey_poll_setup(true);
2212
2213         mutex_unlock(&hotkey_mutex);
2214
2215         return rc;
2216 }
2217
2218 static int hotkey_status_get(int *status)
2219 {
2220         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2221                 return -EIO;
2222
2223         return 0;
2224 }
2225
2226 static int hotkey_status_set(bool enable)
2227 {
2228         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2229                 return -EIO;
2230
2231         return 0;
2232 }
2233
2234 static void tpacpi_input_send_tabletsw(void)
2235 {
2236         int state;
2237
2238         if (tp_features.hotkey_tablet &&
2239             !hotkey_get_tablet_mode(&state)) {
2240                 mutex_lock(&tpacpi_inputdev_send_mutex);
2241
2242                 input_report_switch(tpacpi_inputdev,
2243                                     SW_TABLET_MODE, !!state);
2244                 input_sync(tpacpi_inputdev);
2245
2246                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2247         }
2248 }
2249
2250 /* Do NOT call without validating scancode first */
2251 static void tpacpi_input_send_key(const unsigned int scancode)
2252 {
2253         const unsigned int keycode = hotkey_keycode_map[scancode];
2254
2255         if (keycode != KEY_RESERVED) {
2256                 mutex_lock(&tpacpi_inputdev_send_mutex);
2257
2258                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2259                 input_report_key(tpacpi_inputdev, keycode, 1);
2260                 input_sync(tpacpi_inputdev);
2261
2262                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2263                 input_report_key(tpacpi_inputdev, keycode, 0);
2264                 input_sync(tpacpi_inputdev);
2265
2266                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2267         }
2268 }
2269
2270 /* Do NOT call without validating scancode first */
2271 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2272 {
2273         hotkey_driver_event(scancode);
2274         if (hotkey_user_mask & (1 << scancode))
2275                 tpacpi_input_send_key(scancode);
2276 }
2277
2278 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2279 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2280
2281 /* Do NOT call without validating scancode first */
2282 static void tpacpi_hotkey_send_key(unsigned int scancode)
2283 {
2284         tpacpi_input_send_key_masked(scancode);
2285         if (hotkey_report_mode < 2) {
2286                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2287                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2288         }
2289 }
2290
2291 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2292 {
2293         u8 d;
2294
2295         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2296                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2297                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2298                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2299                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2300                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2301         }
2302         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2303                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2304                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2305         }
2306         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2307                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2308                 n->displayexp_toggle =
2309                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2310         }
2311         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2312                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2313                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2314                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2315                 n->brightness_toggle =
2316                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2317         }
2318         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2319                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2320                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2321                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2322                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2323                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2324         }
2325 }
2326
2327 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2328                                            struct tp_nvram_state *newn,
2329                                            const u32 event_mask)
2330 {
2331
2332 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2333         do { \
2334                 if ((event_mask & (1 << __scancode)) && \
2335                     oldn->__member != newn->__member) \
2336                         tpacpi_hotkey_send_key(__scancode); \
2337         } while (0)
2338
2339 #define TPACPI_MAY_SEND_KEY(__scancode) \
2340         do { \
2341                 if (event_mask & (1 << __scancode)) \
2342                         tpacpi_hotkey_send_key(__scancode); \
2343         } while (0)
2344
2345         void issue_volchange(const unsigned int oldvol,
2346                              const unsigned int newvol)
2347         {
2348                 unsigned int i = oldvol;
2349
2350                 while (i > newvol) {
2351                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2352                         i--;
2353                 }
2354                 while (i < newvol) {
2355                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2356                         i++;
2357                 }
2358         }
2359
2360         void issue_brightnesschange(const unsigned int oldbrt,
2361                                     const unsigned int newbrt)
2362         {
2363                 unsigned int i = oldbrt;
2364
2365                 while (i > newbrt) {
2366                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2367                         i--;
2368                 }
2369                 while (i < newbrt) {
2370                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2371                         i++;
2372                 }
2373         }
2374
2375         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2376         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2377         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2378         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2379
2380         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2381
2382         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2383
2384         /*
2385          * Handle volume
2386          *
2387          * This code is supposed to duplicate the IBM firmware behaviour:
2388          * - Pressing MUTE issues mute hotkey message, even when already mute
2389          * - Pressing Volume up/down issues volume up/down hotkey messages,
2390          *   even when already at maximum or minimum volume
2391          * - The act of unmuting issues volume up/down notification,
2392          *   depending which key was used to unmute
2393          *
2394          * We are constrained to what the NVRAM can tell us, which is not much
2395          * and certainly not enough if more than one volume hotkey was pressed
2396          * since the last poll cycle.
2397          *
2398          * Just to make our life interesting, some newer Lenovo ThinkPads have
2399          * bugs in the BIOS and may fail to update volume_toggle properly.
2400          */
2401         if (newn->mute) {
2402                 /* muted */
2403                 if (!oldn->mute ||
2404                     oldn->volume_toggle != newn->volume_toggle ||
2405                     oldn->volume_level != newn->volume_level) {
2406                         /* recently muted, or repeated mute keypress, or
2407                          * multiple presses ending in mute */
2408                         issue_volchange(oldn->volume_level, newn->volume_level);
2409                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2410                 }
2411         } else {
2412                 /* unmute */
2413                 if (oldn->mute) {
2414                         /* recently unmuted, issue 'unmute' keypress */
2415                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2416                 }
2417                 if (oldn->volume_level != newn->volume_level) {
2418                         issue_volchange(oldn->volume_level, newn->volume_level);
2419                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2420                         /* repeated vol up/down keypress at end of scale ? */
2421                         if (newn->volume_level == 0)
2422                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2423                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2424                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2425                 }
2426         }
2427
2428         /* handle brightness */
2429         if (oldn->brightness_level != newn->brightness_level) {
2430                 issue_brightnesschange(oldn->brightness_level,
2431                                        newn->brightness_level);
2432         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2433                 /* repeated key presses that didn't change state */
2434                 if (newn->brightness_level == 0)
2435                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2436                 else if (newn->brightness_level >= bright_maxlvl
2437                                 && !tp_features.bright_unkfw)
2438                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2439         }
2440
2441 #undef TPACPI_COMPARE_KEY
2442 #undef TPACPI_MAY_SEND_KEY
2443 }
2444
2445 /*
2446  * Polling driver
2447  *
2448  * We track all events in hotkey_source_mask all the time, since
2449  * most of them are edge-based.  We only issue those requested by
2450  * hotkey_user_mask or hotkey_driver_mask, though.
2451  */
2452 static int hotkey_kthread(void *data)
2453 {
2454         struct tp_nvram_state s[2];
2455         u32 poll_mask, event_mask;
2456         unsigned int si, so;
2457         unsigned long t;
2458         unsigned int change_detector;
2459         unsigned int poll_freq;
2460         bool was_frozen;
2461
2462         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2463                 goto exit;
2464
2465         set_freezable();
2466
2467         so = 0;
2468         si = 1;
2469         t = 0;
2470
2471         /* Initial state for compares */
2472         mutex_lock(&hotkey_thread_data_mutex);
2473         change_detector = hotkey_config_change;
2474         poll_mask = hotkey_source_mask;
2475         event_mask = hotkey_source_mask &
2476                         (hotkey_driver_mask | hotkey_user_mask);
2477         poll_freq = hotkey_poll_freq;
2478         mutex_unlock(&hotkey_thread_data_mutex);
2479         hotkey_read_nvram(&s[so], poll_mask);
2480
2481         while (!kthread_should_stop()) {
2482                 if (t == 0) {
2483                         if (likely(poll_freq))
2484                                 t = 1000/poll_freq;
2485                         else
2486                                 t = 100;        /* should never happen... */
2487                 }
2488                 t = msleep_interruptible(t);
2489                 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2490                         break;
2491
2492                 if (t > 0 && !was_frozen)
2493                         continue;
2494
2495                 mutex_lock(&hotkey_thread_data_mutex);
2496                 if (was_frozen || hotkey_config_change != change_detector) {
2497                         /* forget old state on thaw or config change */
2498                         si = so;
2499                         t = 0;
2500                         change_detector = hotkey_config_change;
2501                 }
2502                 poll_mask = hotkey_source_mask;
2503                 event_mask = hotkey_source_mask &
2504                                 (hotkey_driver_mask | hotkey_user_mask);
2505                 poll_freq = hotkey_poll_freq;
2506                 mutex_unlock(&hotkey_thread_data_mutex);
2507
2508                 if (likely(poll_mask)) {
2509                         hotkey_read_nvram(&s[si], poll_mask);
2510                         if (likely(si != so)) {
2511                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2512                                                                 event_mask);
2513                         }
2514                 }
2515
2516                 so = si;
2517                 si ^= 1;
2518         }
2519
2520 exit:
2521         return 0;
2522 }
2523
2524 /* call with hotkey_mutex held */
2525 static void hotkey_poll_stop_sync(void)
2526 {
2527         if (tpacpi_hotkey_task) {
2528                 kthread_stop(tpacpi_hotkey_task);
2529                 tpacpi_hotkey_task = NULL;
2530         }
2531 }
2532
2533 /* call with hotkey_mutex held */
2534 static void hotkey_poll_setup(const bool may_warn)
2535 {
2536         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2537         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2538
2539         if (hotkey_poll_freq > 0 &&
2540             (poll_driver_mask ||
2541              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2542                 if (!tpacpi_hotkey_task) {
2543                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2544                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2545                         if (IS_ERR(tpacpi_hotkey_task)) {
2546                                 tpacpi_hotkey_task = NULL;
2547                                 pr_err("could not create kernel thread "
2548                                        "for hotkey polling\n");
2549                         }
2550                 }
2551         } else {
2552                 hotkey_poll_stop_sync();
2553                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2554                     hotkey_poll_freq == 0) {
2555                         pr_notice("hot keys 0x%08x and/or events 0x%08x "
2556                                   "require polling, which is currently "
2557                                   "disabled\n",
2558                                   poll_user_mask, poll_driver_mask);
2559                 }
2560         }
2561 }
2562
2563 static void hotkey_poll_setup_safe(const bool may_warn)
2564 {
2565         mutex_lock(&hotkey_mutex);
2566         hotkey_poll_setup(may_warn);
2567         mutex_unlock(&hotkey_mutex);
2568 }
2569
2570 /* call with hotkey_mutex held */
2571 static void hotkey_poll_set_freq(unsigned int freq)
2572 {
2573         if (!freq)
2574                 hotkey_poll_stop_sync();
2575
2576         hotkey_poll_freq = freq;
2577 }
2578
2579 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2580
2581 static void hotkey_poll_setup(const bool __unused)
2582 {
2583 }
2584
2585 static void hotkey_poll_setup_safe(const bool __unused)
2586 {
2587 }
2588
2589 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2590
2591 static int hotkey_inputdev_open(struct input_dev *dev)
2592 {
2593         switch (tpacpi_lifecycle) {
2594         case TPACPI_LIFE_INIT:
2595         case TPACPI_LIFE_RUNNING:
2596                 hotkey_poll_setup_safe(false);
2597                 return 0;
2598         case TPACPI_LIFE_EXITING:
2599                 return -EBUSY;
2600         }
2601
2602         /* Should only happen if tpacpi_lifecycle is corrupt */
2603         BUG();
2604         return -EBUSY;
2605 }
2606
2607 static void hotkey_inputdev_close(struct input_dev *dev)
2608 {
2609         /* disable hotkey polling when possible */
2610         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2611             !(hotkey_source_mask & hotkey_driver_mask))
2612                 hotkey_poll_setup_safe(false);
2613 }
2614
2615 /* sysfs hotkey enable ------------------------------------------------- */
2616 static ssize_t hotkey_enable_show(struct device *dev,
2617                            struct device_attribute *attr,
2618                            char *buf)
2619 {
2620         int res, status;
2621
2622         printk_deprecated_attribute("hotkey_enable",
2623                         "Hotkey reporting is always enabled");
2624
2625         res = hotkey_status_get(&status);
2626         if (res)
2627                 return res;
2628
2629         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2630 }
2631
2632 static ssize_t hotkey_enable_store(struct device *dev,
2633                             struct device_attribute *attr,
2634                             const char *buf, size_t count)
2635 {
2636         unsigned long t;
2637
2638         printk_deprecated_attribute("hotkey_enable",
2639                         "Hotkeys can be disabled through hotkey_mask");
2640
2641         if (parse_strtoul(buf, 1, &t))
2642                 return -EINVAL;
2643
2644         if (t == 0)
2645                 return -EPERM;
2646
2647         return count;
2648 }
2649
2650 static struct device_attribute dev_attr_hotkey_enable =
2651         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2652                 hotkey_enable_show, hotkey_enable_store);
2653
2654 /* sysfs hotkey mask --------------------------------------------------- */
2655 static ssize_t hotkey_mask_show(struct device *dev,
2656                            struct device_attribute *attr,
2657                            char *buf)
2658 {
2659         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2660 }
2661
2662 static ssize_t hotkey_mask_store(struct device *dev,
2663                             struct device_attribute *attr,
2664                             const char *buf, size_t count)
2665 {
2666         unsigned long t;
2667         int res;
2668
2669         if (parse_strtoul(buf, 0xffffffffUL, &t))
2670                 return -EINVAL;
2671
2672         if (mutex_lock_killable(&hotkey_mutex))
2673                 return -ERESTARTSYS;
2674
2675         res = hotkey_user_mask_set(t);
2676
2677 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2678         hotkey_poll_setup(true);
2679 #endif
2680
2681         mutex_unlock(&hotkey_mutex);
2682
2683         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2684
2685         return (res) ? res : count;
2686 }
2687
2688 static struct device_attribute dev_attr_hotkey_mask =
2689         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2690                 hotkey_mask_show, hotkey_mask_store);
2691
2692 /* sysfs hotkey bios_enabled ------------------------------------------- */
2693 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2694                            struct device_attribute *attr,
2695                            char *buf)
2696 {
2697         return sprintf(buf, "0\n");
2698 }
2699
2700 static struct device_attribute dev_attr_hotkey_bios_enabled =
2701         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2702
2703 /* sysfs hotkey bios_mask ---------------------------------------------- */
2704 static ssize_t hotkey_bios_mask_show(struct device *dev,
2705                            struct device_attribute *attr,
2706                            char *buf)
2707 {
2708         printk_deprecated_attribute("hotkey_bios_mask",
2709                         "This attribute is useless.");
2710         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2711 }
2712
2713 static struct device_attribute dev_attr_hotkey_bios_mask =
2714         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2715
2716 /* sysfs hotkey all_mask ----------------------------------------------- */
2717 static ssize_t hotkey_all_mask_show(struct device *dev,
2718                            struct device_attribute *attr,
2719                            char *buf)
2720 {
2721         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2722                                 hotkey_all_mask | hotkey_source_mask);
2723 }
2724
2725 static struct device_attribute dev_attr_hotkey_all_mask =
2726         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2727
2728 /* sysfs hotkey recommended_mask --------------------------------------- */
2729 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2730                                             struct device_attribute *attr,
2731                                             char *buf)
2732 {
2733         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2734                         (hotkey_all_mask | hotkey_source_mask)
2735                         & ~hotkey_reserved_mask);
2736 }
2737
2738 static struct device_attribute dev_attr_hotkey_recommended_mask =
2739         __ATTR(hotkey_recommended_mask, S_IRUGO,
2740                 hotkey_recommended_mask_show, NULL);
2741
2742 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2743
2744 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2745 static ssize_t hotkey_source_mask_show(struct device *dev,
2746                            struct device_attribute *attr,
2747                            char *buf)
2748 {
2749         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2750 }
2751
2752 static ssize_t hotkey_source_mask_store(struct device *dev,
2753                             struct device_attribute *attr,
2754                             const char *buf, size_t count)
2755 {
2756         unsigned long t;
2757         u32 r_ev;
2758         int rc;
2759
2760         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2761                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2762                 return -EINVAL;
2763
2764         if (mutex_lock_killable(&hotkey_mutex))
2765                 return -ERESTARTSYS;
2766
2767         HOTKEY_CONFIG_CRITICAL_START
2768         hotkey_source_mask = t;
2769         HOTKEY_CONFIG_CRITICAL_END
2770
2771         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2772                         ~hotkey_source_mask);
2773         hotkey_poll_setup(true);
2774
2775         /* check if events needed by the driver got disabled */
2776         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2777                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2778
2779         mutex_unlock(&hotkey_mutex);
2780
2781         if (rc < 0)
2782                 pr_err("hotkey_source_mask: "
2783                        "failed to update the firmware event mask!\n");
2784
2785         if (r_ev)
2786                 pr_notice("hotkey_source_mask: "
2787                           "some important events were disabled: 0x%04x\n",
2788                           r_ev);
2789
2790         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2791
2792         return (rc < 0) ? rc : count;
2793 }
2794
2795 static struct device_attribute dev_attr_hotkey_source_mask =
2796         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2797                 hotkey_source_mask_show, hotkey_source_mask_store);
2798
2799 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2800 static ssize_t hotkey_poll_freq_show(struct device *dev,
2801                            struct device_attribute *attr,
2802                            char *buf)
2803 {
2804         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2805 }
2806
2807 static ssize_t hotkey_poll_freq_store(struct device *dev,
2808                             struct device_attribute *attr,
2809                             const char *buf, size_t count)
2810 {
2811         unsigned long t;
2812
2813         if (parse_strtoul(buf, 25, &t))
2814                 return -EINVAL;
2815
2816         if (mutex_lock_killable(&hotkey_mutex))
2817                 return -ERESTARTSYS;
2818
2819         hotkey_poll_set_freq(t);
2820         hotkey_poll_setup(true);
2821
2822         mutex_unlock(&hotkey_mutex);
2823
2824         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2825
2826         return count;
2827 }
2828
2829 static struct device_attribute dev_attr_hotkey_poll_freq =
2830         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2831                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2832
2833 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2834
2835 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2836 static ssize_t hotkey_radio_sw_show(struct device *dev,
2837                            struct device_attribute *attr,
2838                            char *buf)
2839 {
2840         int res;
2841         res = hotkey_get_wlsw();
2842         if (res < 0)
2843                 return res;
2844
2845         /* Opportunistic update */
2846         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2847
2848         return snprintf(buf, PAGE_SIZE, "%d\n",
2849                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2850 }
2851
2852 static struct device_attribute dev_attr_hotkey_radio_sw =
2853         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2854
2855 static void hotkey_radio_sw_notify_change(void)
2856 {
2857         if (tp_features.hotkey_wlsw)
2858                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2859                              "hotkey_radio_sw");
2860 }
2861
2862 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2863 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2864                            struct device_attribute *attr,
2865                            char *buf)
2866 {
2867         int res, s;
2868         res = hotkey_get_tablet_mode(&s);
2869         if (res < 0)
2870                 return res;
2871
2872         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2873 }
2874
2875 static struct device_attribute dev_attr_hotkey_tablet_mode =
2876         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2877
2878 static void hotkey_tablet_mode_notify_change(void)
2879 {
2880         if (tp_features.hotkey_tablet)
2881                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2882                              "hotkey_tablet_mode");
2883 }
2884
2885 /* sysfs hotkey report_mode -------------------------------------------- */
2886 static ssize_t hotkey_report_mode_show(struct device *dev,
2887                            struct device_attribute *attr,
2888                            char *buf)
2889 {
2890         return snprintf(buf, PAGE_SIZE, "%d\n",
2891                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2892 }
2893
2894 static struct device_attribute dev_attr_hotkey_report_mode =
2895         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2896
2897 /* sysfs wakeup reason (pollable) -------------------------------------- */
2898 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2899                            struct device_attribute *attr,
2900                            char *buf)
2901 {
2902         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2903 }
2904
2905 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2906         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2907
2908 static void hotkey_wakeup_reason_notify_change(void)
2909 {
2910         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2911                      "wakeup_reason");
2912 }
2913
2914 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2915 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2916                            struct device_attribute *attr,
2917                            char *buf)
2918 {
2919         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2920 }
2921
2922 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2923         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2924                hotkey_wakeup_hotunplug_complete_show, NULL);
2925
2926 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2927 {
2928         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2929                      "wakeup_hotunplug_complete");
2930 }
2931
2932 /* --------------------------------------------------------------------- */
2933
2934 static struct attribute *hotkey_attributes[] __initdata = {
2935         &dev_attr_hotkey_enable.attr,
2936         &dev_attr_hotkey_bios_enabled.attr,
2937         &dev_attr_hotkey_bios_mask.attr,
2938         &dev_attr_hotkey_report_mode.attr,
2939         &dev_attr_hotkey_wakeup_reason.attr,
2940         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2941         &dev_attr_hotkey_mask.attr,
2942         &dev_attr_hotkey_all_mask.attr,
2943         &dev_attr_hotkey_recommended_mask.attr,
2944 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2945         &dev_attr_hotkey_source_mask.attr,
2946         &dev_attr_hotkey_poll_freq.attr,
2947 #endif
2948 };
2949
2950 /*
2951  * Sync both the hw and sw blocking state of all switches
2952  */
2953 static void tpacpi_send_radiosw_update(void)
2954 {
2955         int wlsw;
2956
2957         /*
2958          * We must sync all rfkill controllers *before* issuing any
2959          * rfkill input events, or we will race the rfkill core input
2960          * handler.
2961          *
2962          * tpacpi_inputdev_send_mutex works as a synchronization point
2963          * for the above.
2964          *
2965          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2966          */
2967
2968         wlsw = hotkey_get_wlsw();
2969
2970         /* Sync hw blocking state first if it is hw-blocked */
2971         if (wlsw == TPACPI_RFK_RADIO_OFF)
2972                 tpacpi_rfk_update_hwblock_state(true);
2973
2974         /* Sync sw blocking state */
2975         tpacpi_rfk_update_swstate_all();
2976
2977         /* Sync hw blocking state last if it is hw-unblocked */
2978         if (wlsw == TPACPI_RFK_RADIO_ON)
2979                 tpacpi_rfk_update_hwblock_state(false);
2980
2981         /* Issue rfkill input event for WLSW switch */
2982         if (!(wlsw < 0)) {
2983                 mutex_lock(&tpacpi_inputdev_send_mutex);
2984
2985                 input_report_switch(tpacpi_inputdev,
2986                                     SW_RFKILL_ALL, (wlsw > 0));
2987                 input_sync(tpacpi_inputdev);
2988
2989                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2990         }
2991
2992         /*
2993          * this can be unconditional, as we will poll state again
2994          * if userspace uses the notify to read data
2995          */
2996         hotkey_radio_sw_notify_change();
2997 }
2998
2999 static void hotkey_exit(void)
3000 {
3001 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3002         mutex_lock(&hotkey_mutex);
3003         hotkey_poll_stop_sync();
3004         mutex_unlock(&hotkey_mutex);
3005 #endif
3006
3007         if (hotkey_dev_attributes)
3008                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3009
3010         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3011                    "restoring original HKEY status and mask\n");
3012         /* yes, there is a bitwise or below, we want the
3013          * functions to be called even if one of them fail */
3014         if (((tp_features.hotkey_mask &&
3015               hotkey_mask_set(hotkey_orig_mask)) |
3016              hotkey_status_set(false)) != 0)
3017                 pr_err("failed to restore hot key mask "
3018                        "to BIOS defaults\n");
3019 }
3020
3021 static void __init hotkey_unmap(const unsigned int scancode)
3022 {
3023         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3024                 clear_bit(hotkey_keycode_map[scancode],
3025                           tpacpi_inputdev->keybit);
3026                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3027         }
3028 }
3029
3030 /*
3031  * HKEY quirks:
3032  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3033  */
3034
3035 #define TPACPI_HK_Q_INIMASK     0x0001
3036
3037 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3038         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3039         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3040         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3041         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3042         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3043         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3044         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3045         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3046         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3047         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3048         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3049         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3050         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3051         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3052         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3053         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3054         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3055         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3056         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3057 };
3058
3059 typedef u16 tpacpi_keymap_entry_t;
3060 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3061
3062 static int __init hotkey_init(struct ibm_init_struct *iibm)
3063 {
3064         /* Requirements for changing the default keymaps:
3065          *
3066          * 1. Many of the keys are mapped to KEY_RESERVED for very
3067          *    good reasons.  Do not change them unless you have deep
3068          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3069          *    the various ThinkPad models.  The driver behaves
3070          *    differently for KEY_RESERVED: such keys have their
3071          *    hot key mask *unset* in mask_recommended, and also
3072          *    in the initial hot key mask programmed into the
3073          *    firmware at driver load time, which means the firm-
3074          *    ware may react very differently if you change them to
3075          *    something else;
3076          *
3077          * 2. You must be subscribed to the linux-thinkpad and
3078          *    ibm-acpi-devel mailing lists, and you should read the
3079          *    list archives since 2007 if you want to change the
3080          *    keymaps.  This requirement exists so that you will
3081          *    know the past history of problems with the thinkpad-
3082          *    acpi driver keymaps, and also that you will be
3083          *    listening to any bug reports;
3084          *
3085          * 3. Do not send thinkpad-acpi specific patches directly to
3086          *    for merging, *ever*.  Send them to the linux-acpi
3087          *    mailinglist for comments.  Merging is to be done only
3088          *    through acpi-test and the ACPI maintainer.
3089          *
3090          * If the above is too much to ask, don't change the keymap.
3091          * Ask the thinkpad-acpi maintainer to do it, instead.
3092          */
3093
3094         enum keymap_index {
3095                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3096                 TPACPI_KEYMAP_LENOVO_GENERIC,
3097         };
3098
3099         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3100         /* Generic keymap for IBM ThinkPads */
3101         [TPACPI_KEYMAP_IBM_GENERIC] = {
3102                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3103                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3104                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3105                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3106
3107                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3108                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3109                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3110                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3111
3112                 /* brightness: firmware always reacts to them */
3113                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3114                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3115
3116                 /* Thinklight: firmware always react to it */
3117                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3118
3119                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3120                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3121
3122                 /* Volume: firmware always react to it and reprograms
3123                  * the built-in *extra* mixer.  Never map it to control
3124                  * another mixer by default. */
3125                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3126                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3127                 KEY_RESERVED,   /* 0x16: MUTE */
3128
3129                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3130
3131                 /* (assignments unknown, please report if found) */
3132                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3133                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3134                 },
3135
3136         /* Generic keymap for Lenovo ThinkPads */
3137         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3138                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3139                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3140                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3141                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3142
3143                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3144                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3145                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3146                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3147
3148                 /* These should be enabled --only-- when ACPI video
3149                  * is disabled (i.e. in "vendor" mode), and are handled
3150                  * in a special way by the init code */
3151                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3152                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3153
3154                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3155
3156                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3157                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3158
3159                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3160                  * react to it and reprograms the built-in *extra* mixer.
3161                  * Never map it to control another mixer by default.
3162                  *
3163                  * T60?, T61, R60?, R61: firmware and EC tries to send
3164                  * these over the regular keyboard, so these are no-ops,
3165                  * but there are still weird bugs re. MUTE, so do not
3166                  * change unless you get test reports from all Lenovo
3167                  * models.  May cause the BIOS to interfere with the
3168                  * HDA mixer.
3169                  */
3170                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3171                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3172                 KEY_RESERVED,   /* 0x16: MUTE */
3173
3174                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3175
3176                 /* (assignments unknown, please report if found) */
3177                 KEY_UNKNOWN, KEY_UNKNOWN,
3178
3179                 /*
3180                  * The mic mute button only sends 0x1a.  It does not
3181                  * automatically mute the mic or change the mute light.
3182                  */
3183                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3184
3185                 /* (assignments unknown, please report if found) */
3186                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3187                 KEY_UNKNOWN,
3188                 },
3189         };
3190
3191         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3192                 /* Generic maps (fallback) */
3193                 {
3194                   .vendor = PCI_VENDOR_ID_IBM,
3195                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3196                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3197                 },
3198                 {
3199                   .vendor = PCI_VENDOR_ID_LENOVO,
3200                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3201                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3202                 },
3203         };
3204
3205 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3206 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3207
3208         int res, i;
3209         int status;
3210         int hkeyv;
3211         bool radiosw_state  = false;
3212         bool tabletsw_state = false;
3213
3214         unsigned long quirks;
3215         unsigned long keymap_id;
3216
3217         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3218                         "initializing hotkey subdriver\n");
3219
3220         BUG_ON(!tpacpi_inputdev);
3221         BUG_ON(tpacpi_inputdev->open != NULL ||
3222                tpacpi_inputdev->close != NULL);
3223
3224         TPACPI_ACPIHANDLE_INIT(hkey);
3225         mutex_init(&hotkey_mutex);
3226
3227 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3228         mutex_init(&hotkey_thread_data_mutex);
3229 #endif
3230
3231         /* hotkey not supported on 570 */
3232         tp_features.hotkey = hkey_handle != NULL;
3233
3234         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3235                 "hotkeys are %s\n",
3236                 str_supported(tp_features.hotkey));
3237
3238         if (!tp_features.hotkey)
3239                 return 1;
3240
3241         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3242                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3243
3244         tpacpi_disable_brightness_delay();
3245
3246         /* MUST have enough space for all attributes to be added to
3247          * hotkey_dev_attributes */
3248         hotkey_dev_attributes = create_attr_set(
3249                                         ARRAY_SIZE(hotkey_attributes) + 2,
3250                                         NULL);
3251         if (!hotkey_dev_attributes)
3252                 return -ENOMEM;
3253         res = add_many_to_attr_set(hotkey_dev_attributes,
3254                         hotkey_attributes,
3255                         ARRAY_SIZE(hotkey_attributes));
3256         if (res)
3257                 goto err_exit;
3258
3259         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3260            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3261            for HKEY interface version 0x100 */
3262         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3263                 if ((hkeyv >> 8) != 1) {
3264                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3265                                hkeyv);
3266                         pr_err("please report this to %s\n", TPACPI_MAIL);
3267                 } else {
3268                         /*
3269                          * MHKV 0x100 in A31, R40, R40e,
3270                          * T4x, X31, and later
3271                          */
3272                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3273                                 "firmware HKEY interface version: 0x%x\n",
3274                                 hkeyv);
3275
3276                         /* Paranoia check AND init hotkey_all_mask */
3277                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3278                                         "MHKA", "qd")) {
3279                                 pr_err("missing MHKA handler, "
3280                                        "please report this to %s\n",
3281                                        TPACPI_MAIL);
3282                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3283                                 hotkey_all_mask = 0x080cU;
3284                         } else {
3285                                 tp_features.hotkey_mask = 1;
3286                         }
3287                 }
3288         }
3289
3290         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3291                 "hotkey masks are %s\n",
3292                 str_supported(tp_features.hotkey_mask));
3293
3294         /* Init hotkey_all_mask if not initialized yet */
3295         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3296             (quirks & TPACPI_HK_Q_INIMASK))
3297                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3298
3299         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3300         if (tp_features.hotkey_mask) {
3301                 /* hotkey_source_mask *must* be zero for
3302                  * the first hotkey_mask_get to return hotkey_orig_mask */
3303                 res = hotkey_mask_get();
3304                 if (res)
3305                         goto err_exit;
3306
3307                 hotkey_orig_mask = hotkey_acpi_mask;
3308         } else {
3309                 hotkey_orig_mask = hotkey_all_mask;
3310                 hotkey_acpi_mask = hotkey_all_mask;
3311         }
3312
3313 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3314         if (dbg_wlswemul) {
3315                 tp_features.hotkey_wlsw = 1;
3316                 radiosw_state = !!tpacpi_wlsw_emulstate;
3317                 pr_info("radio switch emulation enabled\n");
3318         } else
3319 #endif
3320         /* Not all thinkpads have a hardware radio switch */
3321         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3322                 tp_features.hotkey_wlsw = 1;
3323                 radiosw_state = !!status;
3324                 pr_info("radio switch found; radios are %s\n",
3325                         enabled(status, 0));
3326         }
3327         if (tp_features.hotkey_wlsw)
3328                 res = add_to_attr_set(hotkey_dev_attributes,
3329                                 &dev_attr_hotkey_radio_sw.attr);
3330
3331         /* For X41t, X60t, X61t Tablets... */
3332         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3333                 tp_features.hotkey_tablet = 1;
3334                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3335                 pr_info("possible tablet mode switch found; "
3336                         "ThinkPad in %s mode\n",
3337                         (tabletsw_state) ? "tablet" : "laptop");
3338                 res = add_to_attr_set(hotkey_dev_attributes,
3339                                 &dev_attr_hotkey_tablet_mode.attr);
3340         }
3341
3342         if (!res)
3343                 res = register_attr_set_with_sysfs(
3344                                 hotkey_dev_attributes,
3345                                 &tpacpi_pdev->dev.kobj);
3346         if (res)
3347                 goto err_exit;
3348
3349         /* Set up key map */
3350         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3351                                         GFP_KERNEL);
3352         if (!hotkey_keycode_map) {
3353                 pr_err("failed to allocate memory for key map\n");
3354                 res = -ENOMEM;
3355                 goto err_exit;
3356         }
3357
3358         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3359                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3360         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3361         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3362                    "using keymap number %lu\n", keymap_id);
3363
3364         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3365                 TPACPI_HOTKEY_MAP_SIZE);
3366
3367         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3368         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3369         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3370         tpacpi_inputdev->keycode = hotkey_keycode_map;
3371         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3372                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3373                         input_set_capability(tpacpi_inputdev, EV_KEY,
3374                                                 hotkey_keycode_map[i]);
3375                 } else {
3376                         if (i < sizeof(hotkey_reserved_mask)*8)
3377                                 hotkey_reserved_mask |= 1 << i;
3378                 }
3379         }
3380
3381         if (tp_features.hotkey_wlsw) {
3382                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3383                 input_report_switch(tpacpi_inputdev,
3384                                     SW_RFKILL_ALL, radiosw_state);
3385         }
3386         if (tp_features.hotkey_tablet) {
3387                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3388                 input_report_switch(tpacpi_inputdev,
3389                                     SW_TABLET_MODE, tabletsw_state);
3390         }
3391
3392         /* Do not issue duplicate brightness change events to
3393          * userspace. tpacpi_detect_brightness_capabilities() must have
3394          * been called before this point  */
3395         if (acpi_video_backlight_support()) {
3396                 pr_info("This ThinkPad has standard ACPI backlight "
3397                         "brightness control, supported by the ACPI "
3398                         "video driver\n");
3399                 pr_notice("Disabling thinkpad-acpi brightness events "
3400                           "by default...\n");
3401
3402                 /* Disable brightness up/down on Lenovo thinkpads when
3403                  * ACPI is handling them, otherwise it is plain impossible
3404                  * for userspace to do something even remotely sane */
3405                 hotkey_reserved_mask |=
3406                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3407                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3408                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3409                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3410         }
3411
3412 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3413         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3414                                 & ~hotkey_all_mask
3415                                 & ~hotkey_reserved_mask;
3416
3417         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3418                     "hotkey source mask 0x%08x, polling freq %u\n",
3419                     hotkey_source_mask, hotkey_poll_freq);
3420 #endif
3421
3422         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3423                         "enabling firmware HKEY event interface...\n");
3424         res = hotkey_status_set(true);
3425         if (res) {
3426                 hotkey_exit();
3427                 return res;
3428         }
3429         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3430                                | hotkey_driver_mask)
3431                               & ~hotkey_source_mask);
3432         if (res < 0 && res != -ENXIO) {
3433                 hotkey_exit();
3434                 return res;
3435         }
3436         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3437                                 & ~hotkey_reserved_mask;
3438         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3439                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3440                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3441
3442         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3443                         "legacy ibm/hotkey event reporting over procfs %s\n",
3444                         (hotkey_report_mode < 2) ?
3445                                 "enabled" : "disabled");
3446
3447         tpacpi_inputdev->open = &hotkey_inputdev_open;
3448         tpacpi_inputdev->close = &hotkey_inputdev_close;
3449
3450         hotkey_poll_setup_safe(true);
3451
3452         return 0;
3453
3454 err_exit:
3455         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3456         hotkey_dev_attributes = NULL;
3457
3458         return (res < 0)? res : 1;
3459 }
3460
3461 static bool hotkey_notify_hotkey(const u32 hkey,
3462                                  bool *send_acpi_ev,
3463                                  bool *ignore_acpi_ev)
3464 {
3465         /* 0x1000-0x1FFF: key presses */
3466         unsigned int scancode = hkey & 0xfff;
3467         *send_acpi_ev = true;
3468         *ignore_acpi_ev = false;
3469
3470         /* HKEY event 0x1001 is scancode 0x00 */
3471         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3472                 scancode--;
3473                 if (!(hotkey_source_mask & (1 << scancode))) {
3474                         tpacpi_input_send_key_masked(scancode);
3475                         *send_acpi_ev = false;
3476                 } else {
3477                         *ignore_acpi_ev = true;
3478                 }
3479                 return true;
3480         }
3481         return false;
3482 }
3483
3484 static bool hotkey_notify_wakeup(const u32 hkey,
3485                                  bool *send_acpi_ev,
3486                                  bool *ignore_acpi_ev)
3487 {
3488         /* 0x2000-0x2FFF: Wakeup reason */
3489         *send_acpi_ev = true;
3490         *ignore_acpi_ev = false;
3491
3492         switch (hkey) {
3493         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3494         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3495                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3496                 *ignore_acpi_ev = true;
3497                 break;
3498
3499         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3500         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3501                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3502                 *ignore_acpi_ev = true;
3503                 break;
3504
3505         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3506         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3507                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3508                 /* how to auto-heal: */
3509                 /* 2313: woke up from S3, go to S4/S5 */
3510                 /* 2413: woke up from S4, go to S5 */
3511                 break;
3512
3513         default:
3514                 return false;
3515         }
3516
3517         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3518                 pr_info("woke up due to a hot-unplug request...\n");
3519                 hotkey_wakeup_reason_notify_change();
3520         }
3521         return true;
3522 }
3523
3524 static bool hotkey_notify_dockevent(const u32 hkey,
3525                                  bool *send_acpi_ev,
3526                                  bool *ignore_acpi_ev)
3527 {
3528         /* 0x4000-0x4FFF: dock-related events */
3529         *send_acpi_ev = true;
3530         *ignore_acpi_ev = false;
3531
3532         switch (hkey) {
3533         case TP_HKEY_EV_UNDOCK_ACK:
3534                 /* ACPI undock operation completed after wakeup */
3535                 hotkey_autosleep_ack = 1;
3536                 pr_info("undocked\n");
3537                 hotkey_wakeup_hotunplug_complete_notify_change();
3538                 return true;
3539
3540         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3541                 pr_info("docked into hotplug port replicator\n");
3542                 return true;
3543         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3544                 pr_info("undocked from hotplug port replicator\n");
3545                 return true;
3546
3547         default:
3548                 return false;
3549         }
3550 }
3551
3552 static bool hotkey_notify_usrevent(const u32 hkey,
3553                                  bool *send_acpi_ev,
3554                                  bool *ignore_acpi_ev)
3555 {
3556         /* 0x5000-0x5FFF: human interface helpers */
3557         *send_acpi_ev = true;
3558         *ignore_acpi_ev = false;
3559
3560         switch (hkey) {
3561         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3562         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3563                 return true;
3564
3565         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3566         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3567                 tpacpi_input_send_tabletsw();
3568                 hotkey_tablet_mode_notify_change();
3569                 *send_acpi_ev = false;
3570                 return true;
3571
3572         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3573         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3574         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3575                 /* do not propagate these events */
3576                 *ignore_acpi_ev = true;
3577                 return true;
3578
3579         default:
3580                 return false;
3581         }
3582 }
3583
3584 static void thermal_dump_all_sensors(void);
3585
3586 static bool hotkey_notify_6xxx(const u32 hkey,
3587                                  bool *send_acpi_ev,
3588                                  bool *ignore_acpi_ev)
3589 {
3590         bool known = true;
3591
3592         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3593         *send_acpi_ev = true;
3594         *ignore_acpi_ev = false;
3595
3596         switch (hkey) {
3597         case TP_HKEY_EV_THM_TABLE_CHANGED:
3598                 pr_info("EC reports that Thermal Table has changed\n");
3599                 /* recommended action: do nothing, we don't have
3600                  * Lenovo ATM information */
3601                 return true;
3602         case TP_HKEY_EV_ALARM_BAT_HOT:
3603                 pr_crit("THERMAL ALARM: battery is too hot!\n");
3604                 /* recommended action: warn user through gui */
3605                 break;
3606         case TP_HKEY_EV_ALARM_BAT_XHOT:
3607                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3608                 /* recommended action: immediate sleep/hibernate */
3609                 break;
3610         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3611                 pr_crit("THERMAL ALARM: "
3612                         "a sensor reports something is too hot!\n");
3613                 /* recommended action: warn user through gui, that */
3614                 /* some internal component is too hot */
3615                 break;
3616         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3617                 pr_alert("THERMAL EMERGENCY: "
3618                          "a sensor reports something is extremely hot!\n");
3619                 /* recommended action: immediate sleep/hibernate */
3620                 break;
3621         case TP_HKEY_EV_AC_CHANGED:
3622                 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3623                  * AC status changed; can be triggered by plugging or
3624                  * unplugging AC adapter, docking or undocking. */
3625
3626                 /* fallthrough */
3627
3628         case TP_HKEY_EV_KEY_NUMLOCK:
3629         case TP_HKEY_EV_KEY_FN:
3630                 /* key press events, we just ignore them as long as the EC
3631                  * is still reporting them in the normal keyboard stream */
3632                 *send_acpi_ev = false;
3633                 *ignore_acpi_ev = true;
3634                 return true;
3635
3636         default:
3637                 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3638                 known = false;
3639         }
3640
3641         thermal_dump_all_sensors();
3642
3643         return known;
3644 }
3645
3646 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3647 {
3648         u32 hkey;
3649         bool send_acpi_ev;
3650         bool ignore_acpi_ev;
3651         bool known_ev;
3652
3653         if (event != 0x80) {
3654                 pr_err("unknown HKEY notification event %d\n", event);
3655                 /* forward it to userspace, maybe it knows how to handle it */
3656                 acpi_bus_generate_netlink_event(
3657                                         ibm->acpi->device->pnp.device_class,
3658                                         dev_name(&ibm->acpi->device->dev),
3659                                         event, 0);
3660                 return;
3661         }
3662
3663         while (1) {
3664                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3665                         pr_err("failed to retrieve HKEY event\n");
3666                         return;
3667                 }
3668
3669                 if (hkey == 0) {
3670                         /* queue empty */
3671                         return;
3672                 }
3673
3674                 send_acpi_ev = true;
3675                 ignore_acpi_ev = false;
3676
3677                 switch (hkey >> 12) {
3678                 case 1:
3679                         /* 0x1000-0x1FFF: key presses */
3680                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3681                                                  &ignore_acpi_ev);
3682                         break;
3683                 case 2:
3684                         /* 0x2000-0x2FFF: Wakeup reason */
3685                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3686                                                  &ignore_acpi_ev);
3687                         break;
3688                 case 3:
3689                         /* 0x3000-0x3FFF: bay-related wakeups */
3690                         switch (hkey) {
3691                         case TP_HKEY_EV_BAYEJ_ACK:
3692                                 hotkey_autosleep_ack = 1;
3693                                 pr_info("bay ejected\n");
3694                                 hotkey_wakeup_hotunplug_complete_notify_change();
3695                                 known_ev = true;
3696                                 break;
3697                         case TP_HKEY_EV_OPTDRV_EJ:
3698                                 /* FIXME: kick libata if SATA link offline */
3699                                 known_ev = true;
3700                                 break;
3701                         default:
3702                                 known_ev = false;
3703                         }
3704                         break;
3705                 case 4:
3706                         /* 0x4000-0x4FFF: dock-related events */
3707                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3708                                                 &ignore_acpi_ev);
3709                         break;
3710                 case 5:
3711                         /* 0x5000-0x5FFF: human interface helpers */
3712                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3713                                                  &ignore_acpi_ev);
3714                         break;
3715                 case 6:
3716                         /* 0x6000-0x6FFF: thermal alarms/notices and
3717                          *                keyboard events */
3718                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3719                                                  &ignore_acpi_ev);
3720                         break;
3721                 case 7:
3722                         /* 0x7000-0x7FFF: misc */
3723                         if (tp_features.hotkey_wlsw &&
3724                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3725                                 tpacpi_send_radiosw_update();
3726                                 send_acpi_ev = 0;
3727                                 known_ev = true;
3728                                 break;
3729                         }
3730                         /* fallthrough to default */
3731                 default:
3732                         known_ev = false;
3733                 }
3734                 if (!known_ev) {
3735                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3736                         pr_notice("please report the conditions when this "
3737                                   "event happened to %s\n", TPACPI_MAIL);
3738                 }
3739
3740                 /* Legacy events */
3741                 if (!ignore_acpi_ev &&
3742                     (send_acpi_ev || hotkey_report_mode < 2)) {
3743                         acpi_bus_generate_proc_event(ibm->acpi->device,
3744                                                      event, hkey);
3745                 }
3746
3747                 /* netlink events */
3748                 if (!ignore_acpi_ev && send_acpi_ev) {
3749                         acpi_bus_generate_netlink_event(
3750                                         ibm->acpi->device->pnp.device_class,
3751                                         dev_name(&ibm->acpi->device->dev),
3752                                         event, hkey);
3753                 }
3754         }
3755 }
3756
3757 static void hotkey_suspend(void)
3758 {
3759         /* Do these on suspend, we get the events on early resume! */
3760         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3761         hotkey_autosleep_ack = 0;
3762 }
3763
3764 static void hotkey_resume(void)
3765 {
3766         tpacpi_disable_brightness_delay();
3767
3768         if (hotkey_status_set(true) < 0 ||
3769             hotkey_mask_set(hotkey_acpi_mask) < 0)
3770                 pr_err("error while attempting to reset the event "
3771                        "firmware interface\n");
3772
3773         tpacpi_send_radiosw_update();
3774         hotkey_tablet_mode_notify_change();
3775         hotkey_wakeup_reason_notify_change();
3776         hotkey_wakeup_hotunplug_complete_notify_change();
3777         hotkey_poll_setup_safe(false);
3778 }
3779
3780 /* procfs -------------------------------------------------------------- */
3781 static int hotkey_read(struct seq_file *m)
3782 {
3783         int res, status;
3784
3785         if (!tp_features.hotkey) {
3786                 seq_printf(m, "status:\t\tnot supported\n");
3787                 return 0;
3788         }
3789
3790         if (mutex_lock_killable(&hotkey_mutex))
3791                 return -ERESTARTSYS;
3792         res = hotkey_status_get(&status);
3793         if (!res)
3794                 res = hotkey_mask_get();
3795         mutex_unlock(&hotkey_mutex);
3796         if (res)
3797                 return res;
3798
3799         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3800         if (hotkey_all_mask) {
3801                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3802                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3803         } else {
3804                 seq_printf(m, "mask:\t\tnot supported\n");
3805                 seq_printf(m, "commands:\tenable, disable, reset\n");
3806         }
3807
3808         return 0;
3809 }
3810
3811 static void hotkey_enabledisable_warn(bool enable)
3812 {
3813         tpacpi_log_usertask("procfs hotkey enable/disable");
3814         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3815                   pr_fmt("hotkey enable/disable functionality has been "
3816                          "removed from the driver.  "
3817                          "Hotkeys are always enabled.\n")))
3818                 pr_err("Please remove the hotkey=enable module "
3819                        "parameter, it is deprecated.  "
3820                        "Hotkeys are always enabled.\n");
3821 }
3822
3823 static int hotkey_write(char *buf)
3824 {
3825         int res;
3826         u32 mask;
3827         char *cmd;
3828
3829         if (!tp_features.hotkey)
3830                 return -ENODEV;
3831
3832         if (mutex_lock_killable(&hotkey_mutex))
3833                 return -ERESTARTSYS;
3834
3835         mask = hotkey_user_mask;
3836
3837         res = 0;
3838         while ((cmd = next_cmd(&buf))) {
3839                 if (strlencmp(cmd, "enable") == 0) {
3840                         hotkey_enabledisable_warn(1);
3841                 } else if (strlencmp(cmd, "disable") == 0) {
3842                         hotkey_enabledisable_warn(0);
3843                         res = -EPERM;
3844                 } else if (strlencmp(cmd, "reset") == 0) {
3845                         mask = (hotkey_all_mask | hotkey_source_mask)
3846                                 & ~hotkey_reserved_mask;
3847                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3848                         /* mask set */
3849                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3850                         /* mask set */
3851                 } else {
3852                         res = -EINVAL;
3853                         goto errexit;
3854                 }
3855         }
3856
3857         if (!res) {
3858                 tpacpi_disclose_usertask("procfs hotkey",
3859                         "set mask to 0x%08x\n", mask);
3860                 res = hotkey_user_mask_set(mask);
3861         }
3862
3863 errexit:
3864         mutex_unlock(&hotkey_mutex);
3865         return res;
3866 }
3867
3868 static const struct acpi_device_id ibm_htk_device_ids[] = {
3869         {TPACPI_ACPI_IBM_HKEY_HID, 0},
3870         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3871         {"", 0},
3872 };
3873
3874 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3875         .hid = ibm_htk_device_ids,
3876         .notify = hotkey_notify,
3877         .handle = &hkey_handle,
3878         .type = ACPI_DEVICE_NOTIFY,
3879 };
3880
3881 static struct ibm_struct hotkey_driver_data = {
3882         .name = "hotkey",
3883         .read = hotkey_read,
3884         .write = hotkey_write,
3885         .exit = hotkey_exit,
3886         .resume = hotkey_resume,
3887         .suspend = hotkey_suspend,
3888         .acpi = &ibm_hotkey_acpidriver,
3889 };
3890
3891 /*************************************************************************
3892  * Bluetooth subdriver
3893  */
3894
3895 enum {
3896         /* ACPI GBDC/SBDC bits */
3897         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3898         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3899         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3900                                                    0 = disable, 1 = enable */
3901 };
3902
3903 enum {
3904         /* ACPI \BLTH commands */
3905         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3906         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3907         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3908         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3909         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3910 };
3911
3912 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3913
3914 static int bluetooth_get_status(void)
3915 {
3916         int status;
3917
3918 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3919         if (dbg_bluetoothemul)
3920                 return (tpacpi_bluetooth_emulstate) ?
3921                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3922 #endif
3923
3924         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3925                 return -EIO;
3926
3927         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3928                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3929 }
3930
3931 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3932 {
3933         int status;
3934
3935         vdbg_printk(TPACPI_DBG_RFKILL,
3936                 "will attempt to %s bluetooth\n",
3937                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3938
3939 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3940         if (dbg_bluetoothemul) {
3941                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3942                 return 0;
3943         }
3944 #endif
3945
3946         if (state == TPACPI_RFK_RADIO_ON)
3947                 status = TP_ACPI_BLUETOOTH_RADIOSSW
3948                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
3949         else
3950                 status = 0;
3951
3952         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3953                 return -EIO;
3954
3955         return 0;
3956 }
3957
3958 /* sysfs bluetooth enable ---------------------------------------------- */
3959 static ssize_t bluetooth_enable_show(struct device *dev,
3960                            struct device_attribute *attr,
3961                            char *buf)
3962 {
3963         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3964                         attr, buf);
3965 }
3966
3967 static ssize_t bluetooth_enable_store(struct device *dev,
3968                             struct device_attribute *attr,
3969                             const char *buf, size_t count)
3970 {
3971         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3972                                 attr, buf, count);
3973 }
3974
3975 static struct device_attribute dev_attr_bluetooth_enable =
3976         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3977                 bluetooth_enable_show, bluetooth_enable_store);
3978
3979 /* --------------------------------------------------------------------- */
3980
3981 static struct attribute *bluetooth_attributes[] = {
3982         &dev_attr_bluetooth_enable.attr,
3983         NULL
3984 };
3985
3986 static const struct attribute_group bluetooth_attr_group = {
3987         .attrs = bluetooth_attributes,
3988 };
3989
3990 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3991         .get_status = bluetooth_get_status,
3992         .set_status = bluetooth_set_status,
3993 };
3994
3995 static void bluetooth_shutdown(void)
3996 {
3997         /* Order firmware to save current state to NVRAM */
3998         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3999                         TP_ACPI_BLTH_SAVE_STATE))
4000                 pr_notice("failed to save bluetooth state to NVRAM\n");
4001         else
4002                 vdbg_printk(TPACPI_DBG_RFKILL,
4003                         "bluetooth state saved to NVRAM\n");
4004 }
4005
4006 static void bluetooth_exit(void)
4007 {
4008         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4009                         &bluetooth_attr_group);
4010
4011         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4012
4013         bluetooth_shutdown();
4014 }
4015
4016 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4017 {
4018         int res;
4019         int status = 0;
4020
4021         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4022                         "initializing bluetooth subdriver\n");
4023
4024         TPACPI_ACPIHANDLE_INIT(hkey);
4025
4026         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4027            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4028         tp_features.bluetooth = hkey_handle &&
4029             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4030
4031         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4032                 "bluetooth is %s, status 0x%02x\n",
4033                 str_supported(tp_features.bluetooth),
4034                 status);
4035
4036 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4037         if (dbg_bluetoothemul) {
4038                 tp_features.bluetooth = 1;
4039                 pr_info("bluetooth switch emulation enabled\n");
4040         } else
4041 #endif
4042         if (tp_features.bluetooth &&
4043             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4044                 /* no bluetooth hardware present in system */
4045                 tp_features.bluetooth = 0;
4046                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4047                            "bluetooth hardware not installed\n");
4048         }
4049
4050         if (!tp_features.bluetooth)
4051                 return 1;
4052
4053         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4054                                 &bluetooth_tprfk_ops,
4055                                 RFKILL_TYPE_BLUETOOTH,
4056                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4057                                 true);
4058         if (res)
4059                 return res;
4060
4061         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4062                                 &bluetooth_attr_group);
4063         if (res) {
4064                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4065                 return res;
4066         }
4067
4068         return 0;
4069 }
4070
4071 /* procfs -------------------------------------------------------------- */
4072 static int bluetooth_read(struct seq_file *m)
4073 {
4074         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4075 }
4076
4077 static int bluetooth_write(char *buf)
4078 {
4079         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4080 }
4081
4082 static struct ibm_struct bluetooth_driver_data = {
4083         .name = "bluetooth",
4084         .read = bluetooth_read,
4085         .write = bluetooth_write,
4086         .exit = bluetooth_exit,
4087         .shutdown = bluetooth_shutdown,
4088 };
4089
4090 /*************************************************************************
4091  * Wan subdriver
4092  */
4093
4094 enum {
4095         /* ACPI GWAN/SWAN bits */
4096         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4097         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4098         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4099                                                    0 = disable, 1 = enable */
4100 };
4101
4102 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4103
4104 static int wan_get_status(void)
4105 {
4106         int status;
4107
4108 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4109         if (dbg_wwanemul)
4110                 return (tpacpi_wwan_emulstate) ?
4111                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4112 #endif
4113
4114         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4115                 return -EIO;
4116
4117         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4118                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4119 }
4120
4121 static int wan_set_status(enum tpacpi_rfkill_state state)
4122 {
4123         int status;
4124
4125         vdbg_printk(TPACPI_DBG_RFKILL,
4126                 "will attempt to %s wwan\n",
4127                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4128
4129 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4130         if (dbg_wwanemul) {
4131                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4132                 return 0;
4133         }
4134 #endif
4135
4136         if (state == TPACPI_RFK_RADIO_ON)
4137                 status = TP_ACPI_WANCARD_RADIOSSW
4138                          | TP_ACPI_WANCARD_RESUMECTRL;
4139         else
4140                 status = 0;
4141
4142         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4143                 return -EIO;
4144
4145         return 0;
4146 }
4147
4148 /* sysfs wan enable ---------------------------------------------------- */
4149 static ssize_t wan_enable_show(struct device *dev,
4150                            struct device_attribute *attr,
4151                            char *buf)
4152 {
4153         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4154                         attr, buf);
4155 }
4156
4157 static ssize_t wan_enable_store(struct device *dev,
4158                             struct device_attribute *attr,
4159                             const char *buf, size_t count)
4160 {
4161         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4162                         attr, buf, count);
4163 }
4164
4165 static struct device_attribute dev_attr_wan_enable =
4166         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4167                 wan_enable_show, wan_enable_store);
4168
4169 /* --------------------------------------------------------------------- */
4170
4171 static struct attribute *wan_attributes[] = {
4172         &dev_attr_wan_enable.attr,
4173         NULL
4174 };
4175
4176 static const struct attribute_group wan_attr_group = {
4177         .attrs = wan_attributes,
4178 };
4179
4180 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4181         .get_status = wan_get_status,
4182         .set_status = wan_set_status,
4183 };
4184
4185 static void wan_shutdown(void)
4186 {
4187         /* Order firmware to save current state to NVRAM */
4188         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4189                         TP_ACPI_WGSV_SAVE_STATE))
4190                 pr_notice("failed to save WWAN state to NVRAM\n");
4191         else
4192                 vdbg_printk(TPACPI_DBG_RFKILL,
4193                         "WWAN state saved to NVRAM\n");
4194 }
4195
4196 static void wan_exit(void)
4197 {
4198         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4199                 &wan_attr_group);
4200
4201         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4202
4203         wan_shutdown();
4204 }
4205
4206 static int __init wan_init(struct ibm_init_struct *iibm)
4207 {
4208         int res;
4209         int status = 0;
4210
4211         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4212                         "initializing wan subdriver\n");
4213
4214         TPACPI_ACPIHANDLE_INIT(hkey);
4215
4216         tp_features.wan = hkey_handle &&
4217             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4218
4219         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4220                 "wan is %s, status 0x%02x\n",
4221                 str_supported(tp_features.wan),
4222                 status);
4223
4224 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4225         if (dbg_wwanemul) {
4226                 tp_features.wan = 1;
4227                 pr_info("wwan switch emulation enabled\n");
4228         } else
4229 #endif
4230         if (tp_features.wan &&
4231             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4232                 /* no wan hardware present in system */
4233                 tp_features.wan = 0;
4234                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4235                            "wan hardware not installed\n");
4236         }
4237
4238         if (!tp_features.wan)
4239                 return 1;
4240
4241         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4242                                 &wan_tprfk_ops,
4243                                 RFKILL_TYPE_WWAN,
4244                                 TPACPI_RFK_WWAN_SW_NAME,
4245                                 true);
4246         if (res)
4247                 return res;
4248
4249         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4250                                 &wan_attr_group);
4251
4252         if (res) {
4253                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4254                 return res;
4255         }
4256
4257         return 0;
4258 }
4259
4260 /* procfs -------------------------------------------------------------- */
4261 static int wan_read(struct seq_file *m)
4262 {
4263         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4264 }
4265
4266 static int wan_write(char *buf)
4267 {
4268         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4269 }
4270
4271 static struct ibm_struct wan_driver_data = {
4272         .name = "wan",
4273         .read = wan_read,
4274         .write = wan_write,
4275         .exit = wan_exit,
4276         .shutdown = wan_shutdown,
4277 };
4278
4279 /*************************************************************************
4280  * UWB subdriver
4281  */
4282
4283 enum {
4284         /* ACPI GUWB/SUWB bits */
4285         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4286         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4287 };
4288
4289 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4290
4291 static int uwb_get_status(void)
4292 {
4293         int status;
4294
4295 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4296         if (dbg_uwbemul)
4297                 return (tpacpi_uwb_emulstate) ?
4298                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4299 #endif
4300
4301         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4302                 return -EIO;
4303
4304         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4305                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4306 }
4307
4308 static int uwb_set_status(enum tpacpi_rfkill_state state)
4309 {
4310         int status;
4311
4312         vdbg_printk(TPACPI_DBG_RFKILL,
4313                 "will attempt to %s UWB\n",
4314                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4315
4316 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4317         if (dbg_uwbemul) {
4318                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4319                 return 0;
4320         }
4321 #endif
4322
4323         if (state == TPACPI_RFK_RADIO_ON)
4324                 status = TP_ACPI_UWB_RADIOSSW;
4325         else
4326                 status = 0;
4327
4328         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4329                 return -EIO;
4330
4331         return 0;
4332 }
4333
4334 /* --------------------------------------------------------------------- */
4335
4336 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4337         .get_status = uwb_get_status,
4338         .set_status = uwb_set_status,
4339 };
4340
4341 static void uwb_exit(void)
4342 {
4343         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4344 }
4345
4346 static int __init uwb_init(struct ibm_init_struct *iibm)
4347 {
4348         int res;
4349         int status = 0;
4350
4351         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4352                         "initializing uwb subdriver\n");
4353
4354         TPACPI_ACPIHANDLE_INIT(hkey);
4355
4356         tp_features.uwb = hkey_handle &&
4357             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4358
4359         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4360                 "uwb is %s, status 0x%02x\n",
4361                 str_supported(tp_features.uwb),
4362                 status);
4363
4364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4365         if (dbg_uwbemul) {
4366                 tp_features.uwb = 1;
4367                 pr_info("uwb switch emulation enabled\n");
4368         } else
4369 #endif
4370         if (tp_features.uwb &&
4371             !(status & TP_ACPI_UWB_HWPRESENT)) {
4372                 /* no uwb hardware present in system */
4373                 tp_features.uwb = 0;
4374                 dbg_printk(TPACPI_DBG_INIT,
4375                            "uwb hardware not installed\n");
4376         }
4377
4378         if (!tp_features.uwb)
4379                 return 1;
4380
4381         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4382                                 &uwb_tprfk_ops,
4383                                 RFKILL_TYPE_UWB,
4384                                 TPACPI_RFK_UWB_SW_NAME,
4385                                 false);
4386         return res;
4387 }
4388
4389 static struct ibm_struct uwb_driver_data = {
4390         .name = "uwb",
4391         .exit = uwb_exit,
4392         .flags.experimental = 1,
4393 };
4394
4395 /*************************************************************************
4396  * Video subdriver
4397  */
4398
4399 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4400
4401 enum video_access_mode {
4402         TPACPI_VIDEO_NONE = 0,
4403         TPACPI_VIDEO_570,       /* 570 */
4404         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4405         TPACPI_VIDEO_NEW,       /* all others */
4406 };
4407
4408 enum {  /* video status flags, based on VIDEO_570 */
4409         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4410         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4411         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4412 };
4413
4414 enum {  /* TPACPI_VIDEO_570 constants */
4415         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4416         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4417                                                  * video_status_flags */
4418         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4419         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4420 };
4421
4422 static enum video_access_mode video_supported;
4423 static int video_orig_autosw;
4424
4425 static int video_autosw_get(void);
4426 static int video_autosw_set(int enable);
4427
4428 TPACPI_HANDLE(vid, root,
4429               "\\_SB.PCI.AGP.VGA",      /* 570 */
4430               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4431               "\\_SB.PCI0.VID0",        /* 770e */
4432               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4433               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4434               "\\_SB.PCI0.AGP.VID",     /* all others */
4435         );                              /* R30, R31 */
4436
4437 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4438
4439 static int __init video_init(struct ibm_init_struct *iibm)
4440 {
4441         int ivga;
4442
4443         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4444
4445         TPACPI_ACPIHANDLE_INIT(vid);
4446         if (tpacpi_is_ibm())
4447                 TPACPI_ACPIHANDLE_INIT(vid2);
4448
4449         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4450                 /* G41, assume IVGA doesn't change */
4451                 vid_handle = vid2_handle;
4452
4453         if (!vid_handle)
4454                 /* video switching not supported on R30, R31 */
4455                 video_supported = TPACPI_VIDEO_NONE;
4456         else if (tpacpi_is_ibm() &&
4457                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4458                 /* 570 */
4459                 video_supported = TPACPI_VIDEO_570;
4460         else if (tpacpi_is_ibm() &&
4461                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4462                 /* 600e/x, 770e, 770x */
4463                 video_supported = TPACPI_VIDEO_770;
4464         else
4465                 /* all others */
4466                 video_supported = TPACPI_VIDEO_NEW;
4467
4468         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4469                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4470                 video_supported);
4471
4472         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4473 }
4474
4475 static void video_exit(void)
4476 {
4477         dbg_printk(TPACPI_DBG_EXIT,
4478                    "restoring original video autoswitch mode\n");
4479         if (video_autosw_set(video_orig_autosw))
4480                 pr_err("error while trying to restore original "
4481                         "video autoswitch mode\n");
4482 }
4483
4484 static int video_outputsw_get(void)
4485 {
4486         int status = 0;
4487         int i;
4488
4489         switch (video_supported) {
4490         case TPACPI_VIDEO_570:
4491                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4492                                  TP_ACPI_VIDEO_570_PHSCMD))
4493                         return -EIO;
4494                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4495                 break;
4496         case TPACPI_VIDEO_770:
4497                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4498                         return -EIO;
4499                 if (i)
4500                         status |= TP_ACPI_VIDEO_S_LCD;
4501                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4502                         return -EIO;
4503                 if (i)
4504                         status |= TP_ACPI_VIDEO_S_CRT;
4505                 break;
4506         case TPACPI_VIDEO_NEW:
4507                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4508                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4509                         return -EIO;
4510                 if (i)
4511                         status |= TP_ACPI_VIDEO_S_CRT;
4512
4513                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4514                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4515                         return -EIO;
4516                 if (i)
4517                         status |= TP_ACPI_VIDEO_S_LCD;
4518                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4519                         return -EIO;
4520                 if (i)
4521                         status |= TP_ACPI_VIDEO_S_DVI;
4522                 break;
4523         default:
4524                 return -ENOSYS;
4525         }
4526
4527         return status;
4528 }
4529
4530 static int video_outputsw_set(int status)
4531 {
4532         int autosw;
4533         int res = 0;
4534
4535         switch (video_supported) {
4536         case TPACPI_VIDEO_570:
4537                 res = acpi_evalf(NULL, NULL,
4538                                  "\\_SB.PHS2", "vdd",
4539                                  TP_ACPI_VIDEO_570_PHS2CMD,
4540                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4541                 break;
4542         case TPACPI_VIDEO_770:
4543                 autosw = video_autosw_get();
4544                 if (autosw < 0)
4545                         return autosw;
4546
4547                 res = video_autosw_set(1);
4548                 if (res)
4549                         return res;
4550                 res = acpi_evalf(vid_handle, NULL,
4551                                  "ASWT", "vdd", status * 0x100, 0);
4552                 if (!autosw && video_autosw_set(autosw)) {
4553                         pr_err("video auto-switch left enabled due to error\n");
4554                         return -EIO;
4555                 }
4556                 break;
4557         case TPACPI_VIDEO_NEW:
4558                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4559                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4560                 break;
4561         default:
4562                 return -ENOSYS;
4563         }
4564
4565         return (res)? 0 : -EIO;
4566 }
4567
4568 static int video_autosw_get(void)
4569 {
4570         int autosw = 0;
4571
4572         switch (video_supported) {
4573         case TPACPI_VIDEO_570:
4574                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4575                         return -EIO;
4576                 break;
4577         case TPACPI_VIDEO_770:
4578         case TPACPI_VIDEO_NEW:
4579                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4580                         return -EIO;
4581                 break;
4582         default:
4583                 return -ENOSYS;
4584         }
4585
4586         return autosw & 1;
4587 }
4588
4589 static int video_autosw_set(int enable)
4590 {
4591         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4592                 return -EIO;
4593         return 0;
4594 }
4595
4596 static int video_outputsw_cycle(void)
4597 {
4598         int autosw = video_autosw_get();
4599         int res;
4600
4601         if (autosw < 0)
4602                 return autosw;
4603
4604         switch (video_supported) {
4605         case TPACPI_VIDEO_570:
4606                 res = video_autosw_set(1);
4607                 if (res)
4608                         return res;
4609                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4610                 break;
4611         case TPACPI_VIDEO_770:
4612         case TPACPI_VIDEO_NEW:
4613                 res = video_autosw_set(1);
4614                 if (res)
4615                         return res;
4616                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4617                 break;
4618         default:
4619                 return -ENOSYS;
4620         }
4621         if (!autosw && video_autosw_set(autosw)) {
4622                 pr_err("video auto-switch left enabled due to error\n");
4623                 return -EIO;
4624         }
4625
4626         return (res)? 0 : -EIO;
4627 }
4628
4629 static int video_expand_toggle(void)
4630 {
4631         switch (video_supported) {
4632         case TPACPI_VIDEO_570:
4633                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4634                         0 : -EIO;
4635         case TPACPI_VIDEO_770:
4636                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4637                         0 : -EIO;
4638         case TPACPI_VIDEO_NEW:
4639                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4640                         0 : -EIO;
4641         default:
4642                 return -ENOSYS;
4643         }
4644         /* not reached */
4645 }
4646
4647 static int video_read(struct seq_file *m)
4648 {
4649         int status, autosw;
4650
4651         if (video_supported == TPACPI_VIDEO_NONE) {
4652                 seq_printf(m, "status:\t\tnot supported\n");
4653                 return 0;
4654         }
4655
4656         /* Even reads can crash X.org, so... */
4657         if (!capable(CAP_SYS_ADMIN))
4658                 return -EPERM;
4659
4660         status = video_outputsw_get();
4661         if (status < 0)
4662                 return status;
4663
4664         autosw = video_autosw_get();
4665         if (autosw < 0)
4666                 return autosw;
4667
4668         seq_printf(m, "status:\t\tsupported\n");
4669         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4670         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4671         if (video_supported == TPACPI_VIDEO_NEW)
4672                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4673         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4674         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4675         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4676         if (video_supported == TPACPI_VIDEO_NEW)
4677                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4678         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4679         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4680
4681         return 0;
4682 }
4683
4684 static int video_write(char *buf)
4685 {
4686         char *cmd;
4687         int enable, disable, status;
4688         int res;
4689
4690         if (video_supported == TPACPI_VIDEO_NONE)
4691                 return -ENODEV;
4692
4693         /* Even reads can crash X.org, let alone writes... */
4694         if (!capable(CAP_SYS_ADMIN))
4695                 return -EPERM;
4696
4697         enable = 0;
4698         disable = 0;
4699
4700         while ((cmd = next_cmd(&buf))) {
4701                 if (strlencmp(cmd, "lcd_enable") == 0) {
4702                         enable |= TP_ACPI_VIDEO_S_LCD;
4703                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4704                         disable |= TP_ACPI_VIDEO_S_LCD;
4705                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4706                         enable |= TP_ACPI_VIDEO_S_CRT;
4707                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4708                         disable |= TP_ACPI_VIDEO_S_CRT;
4709                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4710                            strlencmp(cmd, "dvi_enable") == 0) {
4711                         enable |= TP_ACPI_VIDEO_S_DVI;
4712                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4713                            strlencmp(cmd, "dvi_disable") == 0) {
4714                         disable |= TP_ACPI_VIDEO_S_DVI;
4715                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4716                         res = video_autosw_set(1);
4717                         if (res)
4718                                 return res;
4719                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4720                         res = video_autosw_set(0);
4721                         if (res)
4722                                 return res;
4723                 } else if (strlencmp(cmd, "video_switch") == 0) {
4724                         res = video_outputsw_cycle();
4725                         if (res)
4726                                 return res;
4727                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4728                         res = video_expand_toggle();
4729                         if (res)
4730                                 return res;
4731                 } else
4732                         return -EINVAL;
4733         }
4734
4735         if (enable || disable) {
4736                 status = video_outputsw_get();
4737                 if (status < 0)
4738                         return status;
4739                 res = video_outputsw_set((status & ~disable) | enable);
4740                 if (res)
4741                         return res;
4742         }
4743
4744         return 0;
4745 }
4746
4747 static struct ibm_struct video_driver_data = {
4748         .name = "video",
4749         .read = video_read,
4750         .write = video_write,
4751         .exit = video_exit,
4752 };
4753
4754 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4755
4756 /*************************************************************************
4757  * Light (thinklight) subdriver
4758  */
4759
4760 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4761 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4762
4763 static int light_get_status(void)
4764 {
4765         int status = 0;
4766
4767         if (tp_features.light_status) {
4768                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4769                         return -EIO;
4770                 return (!!status);
4771         }
4772
4773         return -ENXIO;
4774 }
4775
4776 static int light_set_status(int status)
4777 {
4778         int rc;
4779
4780         if (tp_features.light) {
4781                 if (cmos_handle) {
4782                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4783                                         (status)?
4784                                                 TP_CMOS_THINKLIGHT_ON :
4785                                                 TP_CMOS_THINKLIGHT_OFF);
4786                 } else {
4787                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4788                                         (status)? 1 : 0);
4789                 }
4790                 return (rc)? 0 : -EIO;
4791         }
4792
4793         return -ENXIO;
4794 }
4795
4796 static void light_set_status_worker(struct work_struct *work)
4797 {
4798         struct tpacpi_led_classdev *data =
4799                         container_of(work, struct tpacpi_led_classdev, work);
4800
4801         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4802                 light_set_status((data->new_state != TPACPI_LED_OFF));
4803 }
4804
4805 static void light_sysfs_set(struct led_classdev *led_cdev,
4806                         enum led_brightness brightness)
4807 {
4808         struct tpacpi_led_classdev *data =
4809                 container_of(led_cdev,
4810                              struct tpacpi_led_classdev,
4811                              led_classdev);
4812         data->new_state = (brightness != LED_OFF) ?
4813                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4814         queue_work(tpacpi_wq, &data->work);
4815 }
4816
4817 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4818 {
4819         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4820 }
4821
4822 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4823         .led_classdev = {
4824                 .name           = "tpacpi::thinklight",
4825                 .brightness_set = &light_sysfs_set,
4826                 .brightness_get = &light_sysfs_get,
4827         }
4828 };
4829
4830 static int __init light_init(struct ibm_init_struct *iibm)
4831 {
4832         int rc;
4833
4834         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4835
4836         if (tpacpi_is_ibm()) {
4837                 TPACPI_ACPIHANDLE_INIT(ledb);
4838                 TPACPI_ACPIHANDLE_INIT(lght);
4839         }
4840         TPACPI_ACPIHANDLE_INIT(cmos);
4841         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4842
4843         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4844         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4845
4846         if (tp_features.light)
4847                 /* light status not supported on
4848                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4849                 tp_features.light_status =
4850                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4851
4852         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4853                 str_supported(tp_features.light),
4854                 str_supported(tp_features.light_status));
4855
4856         if (!tp_features.light)
4857                 return 1;
4858
4859         rc = led_classdev_register(&tpacpi_pdev->dev,
4860                                    &tpacpi_led_thinklight.led_classdev);
4861
4862         if (rc < 0) {
4863                 tp_features.light = 0;
4864                 tp_features.light_status = 0;
4865         } else  {
4866                 rc = 0;
4867         }
4868
4869         return rc;
4870 }
4871
4872 static void light_exit(void)
4873 {
4874         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4875         flush_workqueue(tpacpi_wq);
4876 }
4877
4878 static int light_read(struct seq_file *m)
4879 {
4880         int status;
4881
4882         if (!tp_features.light) {
4883                 seq_printf(m, "status:\t\tnot supported\n");
4884         } else if (!tp_features.light_status) {
4885                 seq_printf(m, "status:\t\tunknown\n");
4886                 seq_printf(m, "commands:\ton, off\n");
4887         } else {
4888                 status = light_get_status();
4889                 if (status < 0)
4890                         return status;
4891                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4892                 seq_printf(m, "commands:\ton, off\n");
4893         }
4894
4895         return 0;
4896 }
4897
4898 static int light_write(char *buf)
4899 {
4900         char *cmd;
4901         int newstatus = 0;
4902
4903         if (!tp_features.light)
4904                 return -ENODEV;
4905
4906         while ((cmd = next_cmd(&buf))) {
4907                 if (strlencmp(cmd, "on") == 0) {
4908                         newstatus = 1;
4909                 } else if (strlencmp(cmd, "off") == 0) {
4910                         newstatus = 0;
4911                 } else
4912                         return -EINVAL;
4913         }
4914
4915         return light_set_status(newstatus);
4916 }
4917
4918 static struct ibm_struct light_driver_data = {
4919         .name = "light",
4920         .read = light_read,
4921         .write = light_write,
4922         .exit = light_exit,
4923 };
4924
4925 /*************************************************************************
4926  * CMOS subdriver
4927  */
4928
4929 /* sysfs cmos_command -------------------------------------------------- */
4930 static ssize_t cmos_command_store(struct device *dev,
4931                             struct device_attribute *attr,
4932                             const char *buf, size_t count)
4933 {
4934         unsigned long cmos_cmd;
4935         int res;
4936
4937         if (parse_strtoul(buf, 21, &cmos_cmd))
4938                 return -EINVAL;
4939
4940         res = issue_thinkpad_cmos_command(cmos_cmd);
4941         return (res)? res : count;
4942 }
4943
4944 static struct device_attribute dev_attr_cmos_command =
4945         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4946
4947 /* --------------------------------------------------------------------- */
4948
4949 static int __init cmos_init(struct ibm_init_struct *iibm)
4950 {
4951         int res;
4952
4953         vdbg_printk(TPACPI_DBG_INIT,
4954                 "initializing cmos commands subdriver\n");
4955
4956         TPACPI_ACPIHANDLE_INIT(cmos);
4957
4958         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4959                 str_supported(cmos_handle != NULL));
4960
4961         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4962         if (res)
4963                 return res;
4964
4965         return (cmos_handle)? 0 : 1;
4966 }
4967
4968 static void cmos_exit(void)
4969 {
4970         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4971 }
4972
4973 static int cmos_read(struct seq_file *m)
4974 {
4975         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4976            R30, R31, T20-22, X20-21 */
4977         if (!cmos_handle)
4978                 seq_printf(m, "status:\t\tnot supported\n");
4979         else {
4980                 seq_printf(m, "status:\t\tsupported\n");
4981                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4982         }
4983
4984         return 0;
4985 }
4986
4987 static int cmos_write(char *buf)
4988 {
4989         char *cmd;
4990         int cmos_cmd, res;
4991
4992         while ((cmd = next_cmd(&buf))) {
4993                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4994                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4995                         /* cmos_cmd set */
4996                 } else
4997                         return -EINVAL;
4998
4999                 res = issue_thinkpad_cmos_command(cmos_cmd);
5000                 if (res)
5001                         return res;
5002         }
5003
5004         return 0;
5005 }
5006
5007 static struct ibm_struct cmos_driver_data = {
5008         .name = "cmos",
5009         .read = cmos_read,
5010         .write = cmos_write,
5011         .exit = cmos_exit,
5012 };
5013
5014 /*************************************************************************
5015  * LED subdriver
5016  */
5017
5018 enum led_access_mode {
5019         TPACPI_LED_NONE = 0,
5020         TPACPI_LED_570, /* 570 */
5021         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5022         TPACPI_LED_NEW, /* all others */
5023 };
5024
5025 enum {  /* For TPACPI_LED_OLD */
5026         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5027         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5028         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5029 };
5030
5031 static enum led_access_mode led_supported;
5032
5033 static acpi_handle led_handle;
5034
5035 #define TPACPI_LED_NUMLEDS 16
5036 static struct tpacpi_led_classdev *tpacpi_leds;
5037 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5038 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5039         /* there's a limit of 19 chars + NULL before 2.6.26 */
5040         "tpacpi::power",
5041         "tpacpi:orange:batt",
5042         "tpacpi:green:batt",
5043         "tpacpi::dock_active",
5044         "tpacpi::bay_active",
5045         "tpacpi::dock_batt",
5046         "tpacpi::unknown_led",
5047         "tpacpi::standby",
5048         "tpacpi::dock_status1",
5049         "tpacpi::dock_status2",
5050         "tpacpi::unknown_led2",
5051         "tpacpi::unknown_led3",
5052         "tpacpi::thinkvantage",
5053 };
5054 #define TPACPI_SAFE_LEDS        0x1081U
5055
5056 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5057 {
5058 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5059         return false;
5060 #else
5061         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5062 #endif
5063 }
5064
5065 static int led_get_status(const unsigned int led)
5066 {
5067         int status;
5068         enum led_status_t led_s;
5069
5070         switch (led_supported) {
5071         case TPACPI_LED_570:
5072                 if (!acpi_evalf(ec_handle,
5073                                 &status, "GLED", "dd", 1 << led))
5074                         return -EIO;
5075                 led_s = (status == 0)?
5076                                 TPACPI_LED_OFF :
5077                                 ((status == 1)?
5078                                         TPACPI_LED_ON :
5079                                         TPACPI_LED_BLINK);
5080                 tpacpi_led_state_cache[led] = led_s;
5081                 return led_s;
5082         default:
5083                 return -ENXIO;
5084         }
5085
5086         /* not reached */
5087 }
5088
5089 static int led_set_status(const unsigned int led,
5090                           const enum led_status_t ledstatus)
5091 {
5092         /* off, on, blink. Index is led_status_t */
5093         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5094         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5095
5096         int rc = 0;
5097
5098         switch (led_supported) {
5099         case TPACPI_LED_570:
5100                 /* 570 */
5101                 if (unlikely(led > 7))
5102                         return -EINVAL;
5103                 if (unlikely(tpacpi_is_led_restricted(led)))
5104                         return -EPERM;
5105                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5106                                 (1 << led), led_sled_arg1[ledstatus]))
5107                         rc = -EIO;
5108                 break;
5109         case TPACPI_LED_OLD:
5110                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5111                 if (unlikely(led > 7))
5112                         return -EINVAL;
5113                 if (unlikely(tpacpi_is_led_restricted(led)))
5114                         return -EPERM;
5115                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5116                 if (rc >= 0)
5117                         rc = ec_write(TPACPI_LED_EC_HLBL,
5118                                       (ledstatus == TPACPI_LED_BLINK) << led);
5119                 if (rc >= 0)
5120                         rc = ec_write(TPACPI_LED_EC_HLCL,
5121                                       (ledstatus != TPACPI_LED_OFF) << led);
5122                 break;
5123         case TPACPI_LED_NEW:
5124                 /* all others */
5125                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5126                         return -EINVAL;
5127                 if (unlikely(tpacpi_is_led_restricted(led)))
5128                         return -EPERM;
5129                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5130                                 led, led_led_arg1[ledstatus]))
5131                         rc = -EIO;
5132                 break;
5133         default:
5134                 rc = -ENXIO;
5135         }
5136
5137         if (!rc)
5138                 tpacpi_led_state_cache[led] = ledstatus;
5139
5140         return rc;
5141 }
5142
5143 static void led_set_status_worker(struct work_struct *work)
5144 {
5145         struct tpacpi_led_classdev *data =
5146                 container_of(work, struct tpacpi_led_classdev, work);
5147
5148         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5149                 led_set_status(data->led, data->new_state);
5150 }
5151
5152 static void led_sysfs_set(struct led_classdev *led_cdev,
5153                         enum led_brightness brightness)
5154 {
5155         struct tpacpi_led_classdev *data = container_of(led_cdev,
5156                              struct tpacpi_led_classdev, led_classdev);
5157
5158         if (brightness == LED_OFF)
5159                 data->new_state = TPACPI_LED_OFF;
5160         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5161                 data->new_state = TPACPI_LED_ON;
5162         else
5163                 data->new_state = TPACPI_LED_BLINK;
5164
5165         queue_work(tpacpi_wq, &data->work);
5166 }
5167
5168 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5169                         unsigned long *delay_on, unsigned long *delay_off)
5170 {
5171         struct tpacpi_led_classdev *data = container_of(led_cdev,
5172                              struct tpacpi_led_classdev, led_classdev);
5173
5174         /* Can we choose the flash rate? */
5175         if (*delay_on == 0 && *delay_off == 0) {
5176                 /* yes. set them to the hardware blink rate (1 Hz) */
5177                 *delay_on = 500; /* ms */
5178                 *delay_off = 500; /* ms */
5179         } else if ((*delay_on != 500) || (*delay_off != 500))
5180                 return -EINVAL;
5181
5182         data->new_state = TPACPI_LED_BLINK;
5183         queue_work(tpacpi_wq, &data->work);
5184
5185         return 0;
5186 }
5187
5188 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5189 {
5190         int rc;
5191
5192         struct tpacpi_led_classdev *data = container_of(led_cdev,
5193                              struct tpacpi_led_classdev, led_classdev);
5194
5195         rc = led_get_status(data->led);
5196
5197         if (rc == TPACPI_LED_OFF || rc < 0)
5198                 rc = LED_OFF;   /* no error handling in led class :( */
5199         else
5200                 rc = LED_FULL;
5201
5202         return rc;
5203 }
5204
5205 static void led_exit(void)
5206 {
5207         unsigned int i;
5208
5209         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5210                 if (tpacpi_leds[i].led_classdev.name)
5211                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5212         }
5213
5214         flush_workqueue(tpacpi_wq);
5215         kfree(tpacpi_leds);
5216 }
5217
5218 static int __init tpacpi_init_led(unsigned int led)
5219 {
5220         int rc;
5221
5222         tpacpi_leds[led].led = led;
5223
5224         /* LEDs with no name don't get registered */
5225         if (!tpacpi_led_names[led])
5226                 return 0;
5227
5228         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5229         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5230         if (led_supported == TPACPI_LED_570)
5231                 tpacpi_leds[led].led_classdev.brightness_get =
5232                                                 &led_sysfs_get;
5233
5234         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5235
5236         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5237
5238         rc = led_classdev_register(&tpacpi_pdev->dev,
5239                                 &tpacpi_leds[led].led_classdev);
5240         if (rc < 0)
5241                 tpacpi_leds[led].led_classdev.name = NULL;
5242
5243         return rc;
5244 }
5245
5246 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5247         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5248         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5249         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5250
5251         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5252         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5253         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5254         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5255         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5256         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5257         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5258         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5259
5260         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5261         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5262         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5263         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5264         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5265
5266         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5267         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5268         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5269         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5270
5271         /* (1) - may have excess leds enabled on MSB */
5272
5273         /* Defaults (order matters, keep last, don't reorder!) */
5274         { /* Lenovo */
5275           .vendor = PCI_VENDOR_ID_LENOVO,
5276           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5277           .quirks = 0x1fffU,
5278         },
5279         { /* IBM ThinkPads with no EC version string */
5280           .vendor = PCI_VENDOR_ID_IBM,
5281           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5282           .quirks = 0x00ffU,
5283         },
5284         { /* IBM ThinkPads with EC version string */
5285           .vendor = PCI_VENDOR_ID_IBM,
5286           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5287           .quirks = 0x00bfU,
5288         },
5289 };
5290
5291 #undef TPACPI_LEDQ_IBM
5292 #undef TPACPI_LEDQ_LNV
5293
5294 static enum led_access_mode __init led_init_detect_mode(void)
5295 {
5296         acpi_status status;
5297
5298         if (tpacpi_is_ibm()) {
5299                 /* 570 */
5300                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5301                 if (ACPI_SUCCESS(status))
5302                         return TPACPI_LED_570;
5303
5304                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5305                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5306                 if (ACPI_SUCCESS(status))
5307                         return TPACPI_LED_OLD;
5308         }
5309
5310         /* most others */
5311         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5312         if (ACPI_SUCCESS(status))
5313                 return TPACPI_LED_NEW;
5314
5315         /* R30, R31, and unknown firmwares */
5316         led_handle = NULL;
5317         return TPACPI_LED_NONE;
5318 }
5319
5320 static int __init led_init(struct ibm_init_struct *iibm)
5321 {
5322         unsigned int i;
5323         int rc;
5324         unsigned long useful_leds;
5325
5326         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5327
5328         led_supported = led_init_detect_mode();
5329
5330         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5331                 str_supported(led_supported), led_supported);
5332
5333         if (led_supported == TPACPI_LED_NONE)
5334                 return 1;
5335
5336         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5337                               GFP_KERNEL);
5338         if (!tpacpi_leds) {
5339                 pr_err("Out of memory for LED data\n");
5340                 return -ENOMEM;
5341         }
5342
5343         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5344                                           ARRAY_SIZE(led_useful_qtable));
5345
5346         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5347                 if (!tpacpi_is_led_restricted(i) &&
5348                     test_bit(i, &useful_leds)) {
5349                         rc = tpacpi_init_led(i);
5350                         if (rc < 0) {
5351                                 led_exit();
5352                                 return rc;
5353                         }
5354                 }
5355         }
5356
5357 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5358         pr_notice("warning: userspace override of important "
5359                   "firmware LEDs is enabled\n");
5360 #endif
5361         return 0;
5362 }
5363
5364 #define str_led_status(s) \
5365         ((s) == TPACPI_LED_OFF ? "off" : \
5366                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5367
5368 static int led_read(struct seq_file *m)
5369 {
5370         if (!led_supported) {
5371                 seq_printf(m, "status:\t\tnot supported\n");
5372                 return 0;
5373         }
5374         seq_printf(m, "status:\t\tsupported\n");
5375
5376         if (led_supported == TPACPI_LED_570) {
5377                 /* 570 */
5378                 int i, status;
5379                 for (i = 0; i < 8; i++) {
5380                         status = led_get_status(i);
5381                         if (status < 0)
5382                                 return -EIO;
5383                         seq_printf(m, "%d:\t\t%s\n",
5384                                        i, str_led_status(status));
5385                 }
5386         }
5387
5388         seq_printf(m, "commands:\t"
5389                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5390
5391         return 0;
5392 }
5393
5394 static int led_write(char *buf)
5395 {
5396         char *cmd;
5397         int led, rc;
5398         enum led_status_t s;
5399
5400         if (!led_supported)
5401                 return -ENODEV;
5402
5403         while ((cmd = next_cmd(&buf))) {
5404                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5405                         return -EINVAL;
5406
5407                 if (strstr(cmd, "off")) {
5408                         s = TPACPI_LED_OFF;
5409                 } else if (strstr(cmd, "on")) {
5410                         s = TPACPI_LED_ON;
5411                 } else if (strstr(cmd, "blink")) {
5412                         s = TPACPI_LED_BLINK;
5413                 } else {
5414                         return -EINVAL;
5415                 }
5416
5417                 rc = led_set_status(led, s);
5418                 if (rc < 0)
5419                         return rc;
5420         }
5421
5422         return 0;
5423 }
5424
5425 static struct ibm_struct led_driver_data = {
5426         .name = "led",
5427         .read = led_read,
5428         .write = led_write,
5429         .exit = led_exit,
5430 };
5431
5432 /*************************************************************************
5433  * Beep subdriver
5434  */
5435
5436 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5437
5438 #define TPACPI_BEEP_Q1 0x0001
5439
5440 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5441         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5442         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5443 };
5444
5445 static int __init beep_init(struct ibm_init_struct *iibm)
5446 {
5447         unsigned long quirks;
5448
5449         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5450
5451         TPACPI_ACPIHANDLE_INIT(beep);
5452
5453         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5454                 str_supported(beep_handle != NULL));
5455
5456         quirks = tpacpi_check_quirks(beep_quirk_table,
5457                                      ARRAY_SIZE(beep_quirk_table));
5458
5459         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5460
5461         return (beep_handle)? 0 : 1;
5462 }
5463
5464 static int beep_read(struct seq_file *m)
5465 {
5466         if (!beep_handle)
5467                 seq_printf(m, "status:\t\tnot supported\n");
5468         else {
5469                 seq_printf(m, "status:\t\tsupported\n");
5470                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5471         }
5472
5473         return 0;
5474 }
5475
5476 static int beep_write(char *buf)
5477 {
5478         char *cmd;
5479         int beep_cmd;
5480
5481         if (!beep_handle)
5482                 return -ENODEV;
5483
5484         while ((cmd = next_cmd(&buf))) {
5485                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5486                     beep_cmd >= 0 && beep_cmd <= 17) {
5487                         /* beep_cmd set */
5488                 } else
5489                         return -EINVAL;
5490                 if (tp_features.beep_needs_two_args) {
5491                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5492                                         beep_cmd, 0))
5493                                 return -EIO;
5494                 } else {
5495                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5496                                         beep_cmd))
5497                                 return -EIO;
5498                 }
5499         }
5500
5501         return 0;
5502 }
5503
5504 static struct ibm_struct beep_driver_data = {
5505         .name = "beep",
5506         .read = beep_read,
5507         .write = beep_write,
5508 };
5509
5510 /*************************************************************************
5511  * Thermal subdriver
5512  */
5513
5514 enum thermal_access_mode {
5515         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5516         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5517         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5518         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5519         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5520 };
5521
5522 enum { /* TPACPI_THERMAL_TPEC_* */
5523         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5524         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5525         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5526
5527         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5528 };
5529
5530
5531 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5532 struct ibm_thermal_sensors_struct {
5533         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5534 };
5535
5536 static enum thermal_access_mode thermal_read_mode;
5537
5538 /* idx is zero-based */
5539 static int thermal_get_sensor(int idx, s32 *value)
5540 {
5541         int t;
5542         s8 tmp;
5543         char tmpi[5];
5544
5545         t = TP_EC_THERMAL_TMP0;
5546
5547         switch (thermal_read_mode) {
5548 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5549         case TPACPI_THERMAL_TPEC_16:
5550                 if (idx >= 8 && idx <= 15) {
5551                         t = TP_EC_THERMAL_TMP8;
5552                         idx -= 8;
5553                 }
5554                 /* fallthrough */
5555 #endif
5556         case TPACPI_THERMAL_TPEC_8:
5557                 if (idx <= 7) {
5558                         if (!acpi_ec_read(t + idx, &tmp))
5559                                 return -EIO;
5560                         *value = tmp * 1000;
5561                         return 0;
5562                 }
5563                 break;
5564
5565         case TPACPI_THERMAL_ACPI_UPDT:
5566                 if (idx <= 7) {
5567                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5568                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5569                                 return -EIO;
5570                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5571                                 return -EIO;
5572                         *value = (t - 2732) * 100;
5573                         return 0;
5574                 }
5575                 break;
5576
5577         case TPACPI_THERMAL_ACPI_TMP07:
5578                 if (idx <= 7) {
5579                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5580                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5581                                 return -EIO;
5582                         if (t > 127 || t < -127)
5583                                 t = TP_EC_THERMAL_TMP_NA;
5584                         *value = t * 1000;
5585                         return 0;
5586                 }
5587                 break;
5588
5589         case TPACPI_THERMAL_NONE:
5590         default:
5591                 return -ENOSYS;
5592         }
5593
5594         return -EINVAL;
5595 }
5596
5597 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5598 {
5599         int res, i;
5600         int n;
5601
5602         n = 8;
5603         i = 0;
5604
5605         if (!s)
5606                 return -EINVAL;
5607
5608         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5609                 n = 16;
5610
5611         for (i = 0 ; i < n; i++) {
5612                 res = thermal_get_sensor(i, &s->temp[i]);
5613                 if (res)
5614                         return res;
5615         }
5616
5617         return n;
5618 }
5619
5620 static void thermal_dump_all_sensors(void)
5621 {
5622         int n, i;
5623         struct ibm_thermal_sensors_struct t;
5624
5625         n = thermal_get_sensors(&t);
5626         if (n <= 0)
5627                 return;
5628
5629         pr_notice("temperatures (Celsius):");
5630
5631         for (i = 0; i < n; i++) {
5632                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5633                         pr_cont(" %d", (int)(t.temp[i] / 1000));
5634                 else
5635                         pr_cont(" N/A");
5636         }
5637
5638         pr_cont("\n");
5639 }
5640
5641 /* sysfs temp##_input -------------------------------------------------- */
5642
5643 static ssize_t thermal_temp_input_show(struct device *dev,
5644                            struct device_attribute *attr,
5645                            char *buf)
5646 {
5647         struct sensor_device_attribute *sensor_attr =
5648                                         to_sensor_dev_attr(attr);
5649         int idx = sensor_attr->index;
5650         s32 value;
5651         int res;
5652
5653         res = thermal_get_sensor(idx, &value);
5654         if (res)
5655                 return res;
5656         if (value == TPACPI_THERMAL_SENSOR_NA)
5657                 return -ENXIO;
5658
5659         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5660 }
5661
5662 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5663          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5664                      thermal_temp_input_show, NULL, _idxB)
5665
5666 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5667         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5668         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5669         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5670         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5671         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5672         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5673         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5674         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5675         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5676         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5677         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5678         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5679         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5680         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5681         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5682         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5683 };
5684
5685 #define THERMAL_ATTRS(X) \
5686         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5687
5688 static struct attribute *thermal_temp_input_attr[] = {
5689         THERMAL_ATTRS(8),
5690         THERMAL_ATTRS(9),
5691         THERMAL_ATTRS(10),
5692         THERMAL_ATTRS(11),
5693         THERMAL_ATTRS(12),
5694         THERMAL_ATTRS(13),
5695         THERMAL_ATTRS(14),
5696         THERMAL_ATTRS(15),
5697         THERMAL_ATTRS(0),
5698         THERMAL_ATTRS(1),
5699         THERMAL_ATTRS(2),
5700         THERMAL_ATTRS(3),
5701         THERMAL_ATTRS(4),
5702         THERMAL_ATTRS(5),
5703         THERMAL_ATTRS(6),
5704         THERMAL_ATTRS(7),
5705         NULL
5706 };
5707
5708 static const struct attribute_group thermal_temp_input16_group = {
5709         .attrs = thermal_temp_input_attr
5710 };
5711
5712 static const struct attribute_group thermal_temp_input8_group = {
5713         .attrs = &thermal_temp_input_attr[8]
5714 };
5715
5716 #undef THERMAL_SENSOR_ATTR_TEMP
5717 #undef THERMAL_ATTRS
5718
5719 /* --------------------------------------------------------------------- */
5720
5721 static int __init thermal_init(struct ibm_init_struct *iibm)
5722 {
5723         u8 t, ta1, ta2;
5724         int i;
5725         int acpi_tmp7;
5726         int res;
5727
5728         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5729
5730         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5731
5732         if (thinkpad_id.ec_model) {
5733                 /*
5734                  * Direct EC access mode: sensors at registers
5735                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5736                  * non-implemented, thermal sensors return 0x80 when
5737                  * not available
5738                  */
5739
5740                 ta1 = ta2 = 0;
5741                 for (i = 0; i < 8; i++) {
5742                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5743                                 ta1 |= t;
5744                         } else {
5745                                 ta1 = 0;
5746                                 break;
5747                         }
5748                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5749                                 ta2 |= t;
5750                         } else {
5751                                 ta1 = 0;
5752                                 break;
5753                         }
5754                 }
5755                 if (ta1 == 0) {
5756                         /* This is sheer paranoia, but we handle it anyway */
5757                         if (acpi_tmp7) {
5758                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5759                                        "falling back to ACPI TMPx access "
5760                                        "mode\n");
5761                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5762                         } else {
5763                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5764                                        "disabling thermal sensors access\n");
5765                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5766                         }
5767                 } else {
5768                         thermal_read_mode =
5769                             (ta2 != 0) ?
5770                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5771                 }
5772         } else if (acpi_tmp7) {
5773                 if (tpacpi_is_ibm() &&
5774                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5775                         /* 600e/x, 770e, 770x */
5776                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5777                 } else {
5778                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5779                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5780                 }
5781         } else {
5782                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5783                 thermal_read_mode = TPACPI_THERMAL_NONE;
5784         }
5785
5786         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5787                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5788                 thermal_read_mode);
5789
5790         switch (thermal_read_mode) {
5791         case TPACPI_THERMAL_TPEC_16:
5792                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5793                                 &thermal_temp_input16_group);
5794                 if (res)
5795                         return res;
5796                 break;
5797         case TPACPI_THERMAL_TPEC_8:
5798         case TPACPI_THERMAL_ACPI_TMP07:
5799         case TPACPI_THERMAL_ACPI_UPDT:
5800                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5801                                 &thermal_temp_input8_group);
5802                 if (res)
5803                         return res;
5804                 break;
5805         case TPACPI_THERMAL_NONE:
5806         default:
5807                 return 1;
5808         }
5809
5810         return 0;
5811 }
5812
5813 static void thermal_exit(void)
5814 {
5815         switch (thermal_read_mode) {
5816         case TPACPI_THERMAL_TPEC_16:
5817                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5818                                    &thermal_temp_input16_group);
5819                 break;
5820         case TPACPI_THERMAL_TPEC_8:
5821         case TPACPI_THERMAL_ACPI_TMP07:
5822         case TPACPI_THERMAL_ACPI_UPDT:
5823                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5824                                    &thermal_temp_input8_group);
5825                 break;
5826         case TPACPI_THERMAL_NONE:
5827         default:
5828                 break;
5829         }
5830 }
5831
5832 static int thermal_read(struct seq_file *m)
5833 {
5834         int n, i;
5835         struct ibm_thermal_sensors_struct t;
5836
5837         n = thermal_get_sensors(&t);
5838         if (unlikely(n < 0))
5839                 return n;
5840
5841         seq_printf(m, "temperatures:\t");
5842
5843         if (n > 0) {
5844                 for (i = 0; i < (n - 1); i++)
5845                         seq_printf(m, "%d ", t.temp[i] / 1000);
5846                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5847         } else
5848                 seq_printf(m, "not supported\n");
5849
5850         return 0;
5851 }
5852
5853 static struct ibm_struct thermal_driver_data = {
5854         .name = "thermal",
5855         .read = thermal_read,
5856         .exit = thermal_exit,
5857 };
5858
5859 /*************************************************************************
5860  * Backlight/brightness subdriver
5861  */
5862
5863 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5864
5865 /*
5866  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5867  * CMOS NVRAM byte 0x5E, bits 0-3.
5868  *
5869  * EC HBRV (0x31) has the following layout
5870  *   Bit 7: unknown function
5871  *   Bit 6: unknown function
5872  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5873  *   Bit 4: must be set to zero to avoid problems
5874  *   Bit 3-0: backlight brightness level
5875  *
5876  * brightness_get_raw returns status data in the HBRV layout
5877  *
5878  * WARNING: The X61 has been verified to use HBRV for something else, so
5879  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5880  * testing on the very early *60 Lenovo models...
5881  */
5882
5883 enum {
5884         TP_EC_BACKLIGHT = 0x31,
5885
5886         /* TP_EC_BACKLIGHT bitmasks */
5887         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5888         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5889         TP_EC_BACKLIGHT_MAPSW = 0x20,
5890 };
5891
5892 enum tpacpi_brightness_access_mode {
5893         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5894         TPACPI_BRGHT_MODE_EC,           /* EC control */
5895         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5896         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5897         TPACPI_BRGHT_MODE_MAX
5898 };
5899
5900 static struct backlight_device *ibm_backlight_device;
5901
5902 static enum tpacpi_brightness_access_mode brightness_mode =
5903                 TPACPI_BRGHT_MODE_MAX;
5904
5905 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5906
5907 static struct mutex brightness_mutex;
5908
5909 /* NVRAM brightness access,
5910  * call with brightness_mutex held! */
5911 static unsigned int tpacpi_brightness_nvram_get(void)
5912 {
5913         u8 lnvram;
5914
5915         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5916                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5917                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5918         lnvram &= bright_maxlvl;
5919
5920         return lnvram;
5921 }
5922
5923 static void tpacpi_brightness_checkpoint_nvram(void)
5924 {
5925         u8 lec = 0;
5926         u8 b_nvram;
5927
5928         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5929                 return;
5930
5931         vdbg_printk(TPACPI_DBG_BRGHT,
5932                 "trying to checkpoint backlight level to NVRAM...\n");
5933
5934         if (mutex_lock_killable(&brightness_mutex) < 0)
5935                 return;
5936
5937         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5938                 goto unlock;
5939         lec &= TP_EC_BACKLIGHT_LVLMSK;
5940         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5941
5942         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5943                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5944                 /* NVRAM needs update */
5945                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5946                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5947                 b_nvram |= lec;
5948                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5949                 dbg_printk(TPACPI_DBG_BRGHT,
5950                            "updated NVRAM backlight level to %u (0x%02x)\n",
5951                            (unsigned int) lec, (unsigned int) b_nvram);
5952         } else
5953                 vdbg_printk(TPACPI_DBG_BRGHT,
5954                            "NVRAM backlight level already is %u (0x%02x)\n",
5955                            (unsigned int) lec, (unsigned int) b_nvram);
5956
5957 unlock:
5958         mutex_unlock(&brightness_mutex);
5959 }
5960
5961
5962 /* call with brightness_mutex held! */
5963 static int tpacpi_brightness_get_raw(int *status)
5964 {
5965         u8 lec = 0;
5966
5967         switch (brightness_mode) {
5968         case TPACPI_BRGHT_MODE_UCMS_STEP:
5969                 *status = tpacpi_brightness_nvram_get();
5970                 return 0;
5971         case TPACPI_BRGHT_MODE_EC:
5972         case TPACPI_BRGHT_MODE_ECNVRAM:
5973                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5974                         return -EIO;
5975                 *status = lec;
5976                 return 0;
5977         default:
5978                 return -ENXIO;
5979         }
5980 }
5981
5982 /* call with brightness_mutex held! */
5983 /* do NOT call with illegal backlight level value */
5984 static int tpacpi_brightness_set_ec(unsigned int value)
5985 {
5986         u8 lec = 0;
5987
5988         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5989                 return -EIO;
5990
5991         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5992                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5993                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5994                 return -EIO;
5995
5996         return 0;
5997 }
5998
5999 /* call with brightness_mutex held! */
6000 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6001 {
6002         int cmos_cmd, inc;
6003         unsigned int current_value, i;
6004
6005         current_value = tpacpi_brightness_nvram_get();
6006
6007         if (value == current_value)
6008                 return 0;
6009
6010         cmos_cmd = (value > current_value) ?
6011                         TP_CMOS_BRIGHTNESS_UP :
6012                         TP_CMOS_BRIGHTNESS_DOWN;
6013         inc = (value > current_value) ? 1 : -1;
6014
6015         for (i = current_value; i != value; i += inc)
6016                 if (issue_thinkpad_cmos_command(cmos_cmd))
6017                         return -EIO;
6018
6019         return 0;
6020 }
6021
6022 /* May return EINTR which can always be mapped to ERESTARTSYS */
6023 static int brightness_set(unsigned int value)
6024 {
6025         int res;
6026
6027         if (value > bright_maxlvl || value < 0)
6028                 return -EINVAL;
6029
6030         vdbg_printk(TPACPI_DBG_BRGHT,
6031                         "set backlight level to %d\n", value);
6032
6033         res = mutex_lock_killable(&brightness_mutex);
6034         if (res < 0)
6035                 return res;
6036
6037         switch (brightness_mode) {
6038         case TPACPI_BRGHT_MODE_EC:
6039         case TPACPI_BRGHT_MODE_ECNVRAM:
6040                 res = tpacpi_brightness_set_ec(value);
6041                 break;
6042         case TPACPI_BRGHT_MODE_UCMS_STEP:
6043                 res = tpacpi_brightness_set_ucmsstep(value);
6044                 break;
6045         default:
6046                 res = -ENXIO;
6047         }
6048
6049         mutex_unlock(&brightness_mutex);
6050         return res;
6051 }
6052
6053 /* sysfs backlight class ----------------------------------------------- */
6054
6055 static int brightness_update_status(struct backlight_device *bd)
6056 {
6057         unsigned int level =
6058                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6059                  bd->props.power == FB_BLANK_UNBLANK) ?
6060                                 bd->props.brightness : 0;
6061
6062         dbg_printk(TPACPI_DBG_BRGHT,
6063                         "backlight: attempt to set level to %d\n",
6064                         level);
6065
6066         /* it is the backlight class's job (caller) to handle
6067          * EINTR and other errors properly */
6068         return brightness_set(level);
6069 }
6070
6071 static int brightness_get(struct backlight_device *bd)
6072 {
6073         int status, res;
6074
6075         res = mutex_lock_killable(&brightness_mutex);
6076         if (res < 0)
6077                 return 0;
6078
6079         res = tpacpi_brightness_get_raw(&status);
6080
6081         mutex_unlock(&brightness_mutex);
6082
6083         if (res < 0)
6084                 return 0;
6085
6086         return status & TP_EC_BACKLIGHT_LVLMSK;
6087 }
6088
6089 static void tpacpi_brightness_notify_change(void)
6090 {
6091         backlight_force_update(ibm_backlight_device,
6092                                BACKLIGHT_UPDATE_HOTKEY);
6093 }
6094
6095 static const struct backlight_ops ibm_backlight_data = {
6096         .get_brightness = brightness_get,
6097         .update_status  = brightness_update_status,
6098 };
6099
6100 /* --------------------------------------------------------------------- */
6101
6102 /*
6103  * Call _BCL method of video device.  On some ThinkPads this will
6104  * switch the firmware to the ACPI brightness control mode.
6105  */
6106
6107 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6108 {
6109         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6110         union acpi_object *obj;
6111         int rc;
6112
6113         if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6114                 obj = (union acpi_object *)buffer.pointer;
6115                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6116                         pr_err("Unknown _BCL data, please report this to %s\n",
6117                                TPACPI_MAIL);
6118                         rc = 0;
6119                 } else {
6120                         rc = obj->package.count;
6121                 }
6122         } else {
6123                 return 0;
6124         }
6125
6126         kfree(buffer.pointer);
6127         return rc;
6128 }
6129
6130
6131 /*
6132  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6133  */
6134 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6135 {
6136         acpi_handle video_device;
6137         int bcl_levels = 0;
6138
6139         tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6140         if (video_device)
6141                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6142
6143         tp_features.bright_acpimode = (bcl_levels > 0);
6144
6145         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6146 }
6147
6148 /*
6149  * These are only useful for models that have only one possibility
6150  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6151  * these quirks.
6152  */
6153 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6154 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6155 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6156
6157 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6158         /* Models with ATI GPUs known to require ECNVRAM mode */
6159         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6160
6161         /* Models with ATI GPUs that can use ECNVRAM */
6162         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6163         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6164         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6165         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6166
6167         /* Models with Intel Extreme Graphics 2 */
6168         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6169         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6170         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6171
6172         /* Models with Intel GMA900 */
6173         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6174         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6175         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6176 };
6177
6178 /*
6179  * Returns < 0 for error, otherwise sets tp_features.bright_*
6180  * and bright_maxlvl.
6181  */
6182 static void __init tpacpi_detect_brightness_capabilities(void)
6183 {
6184         unsigned int b;
6185
6186         vdbg_printk(TPACPI_DBG_INIT,
6187                     "detecting firmware brightness interface capabilities\n");
6188
6189         /* we could run a quirks check here (same table used by
6190          * brightness_init) if needed */
6191
6192         /*
6193          * We always attempt to detect acpi support, so as to switch
6194          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6195          * going to publish a backlight interface
6196          */
6197         b = tpacpi_check_std_acpi_brightness_support();
6198         switch (b) {
6199         case 16:
6200                 bright_maxlvl = 15;
6201                 pr_info("detected a 16-level brightness capable ThinkPad\n");
6202                 break;
6203         case 8:
6204         case 0:
6205                 bright_maxlvl = 7;
6206                 pr_info("detected a 8-level brightness capable ThinkPad\n");
6207                 break;
6208         default:
6209                 pr_err("Unsupported brightness interface, "
6210                        "please contact %s\n", TPACPI_MAIL);
6211                 tp_features.bright_unkfw = 1;
6212                 bright_maxlvl = b - 1;
6213         }
6214 }
6215
6216 static int __init brightness_init(struct ibm_init_struct *iibm)
6217 {
6218         struct backlight_properties props;
6219         int b;
6220         unsigned long quirks;
6221
6222         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6223
6224         mutex_init(&brightness_mutex);
6225
6226         quirks = tpacpi_check_quirks(brightness_quirk_table,
6227                                 ARRAY_SIZE(brightness_quirk_table));
6228
6229         /* tpacpi_detect_brightness_capabilities() must have run already */
6230
6231         /* if it is unknown, we don't handle it: it wouldn't be safe */
6232         if (tp_features.bright_unkfw)
6233                 return 1;
6234
6235         if (!brightness_enable) {
6236                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6237                            "brightness support disabled by "
6238                            "module parameter\n");
6239                 return 1;
6240         }
6241
6242         if (acpi_video_backlight_support()) {
6243                 if (brightness_enable > 1) {
6244                         pr_info("Standard ACPI backlight interface "
6245                                 "available, not loading native one\n");
6246                         return 1;
6247                 } else if (brightness_enable == 1) {
6248                         pr_warn("Cannot enable backlight brightness support, "
6249                                 "ACPI is already handling it.  Refer to the "
6250                                 "acpi_backlight kernel parameter.\n");
6251                         return 1;
6252                 }
6253         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6254                 pr_notice("Standard ACPI backlight interface not "
6255                           "available, thinkpad_acpi native "
6256                           "brightness control enabled\n");
6257         }
6258
6259         /*
6260          * Check for module parameter bogosity, note that we
6261          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6262          * able to detect "unspecified"
6263          */
6264         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6265                 return -EINVAL;
6266
6267         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6268         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6269             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6270                 if (quirks & TPACPI_BRGHT_Q_EC)
6271                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6272                 else
6273                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6274
6275                 dbg_printk(TPACPI_DBG_BRGHT,
6276                            "driver auto-selected brightness_mode=%d\n",
6277                            brightness_mode);
6278         }
6279
6280         /* Safety */
6281         if (!tpacpi_is_ibm() &&
6282             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6283              brightness_mode == TPACPI_BRGHT_MODE_EC))
6284                 return -EINVAL;
6285
6286         if (tpacpi_brightness_get_raw(&b) < 0)
6287                 return 1;
6288
6289         memset(&props, 0, sizeof(struct backlight_properties));
6290         props.type = BACKLIGHT_PLATFORM;
6291         props.max_brightness = bright_maxlvl;
6292         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6293         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6294                                                          NULL, NULL,
6295                                                          &ibm_backlight_data,
6296                                                          &props);
6297         if (IS_ERR(ibm_backlight_device)) {
6298                 int rc = PTR_ERR(ibm_backlight_device);
6299                 ibm_backlight_device = NULL;
6300                 pr_err("Could not register backlight device\n");
6301                 return rc;
6302         }
6303         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6304                         "brightness is supported\n");
6305
6306         if (quirks & TPACPI_BRGHT_Q_ASK) {
6307                 pr_notice("brightness: will use unverified default: "
6308                           "brightness_mode=%d\n", brightness_mode);
6309                 pr_notice("brightness: please report to %s whether it works well "
6310                           "or not on your ThinkPad\n", TPACPI_MAIL);
6311         }
6312
6313         /* Added by mistake in early 2007.  Probably useless, but it could
6314          * be working around some unknown firmware problem where the value
6315          * read at startup doesn't match the real hardware state... so leave
6316          * it in place just in case */
6317         backlight_update_status(ibm_backlight_device);
6318
6319         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6320                         "brightness: registering brightness hotkeys "
6321                         "as change notification\n");
6322         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6323                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6324                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6325         return 0;
6326 }
6327
6328 static void brightness_suspend(void)
6329 {
6330         tpacpi_brightness_checkpoint_nvram();
6331 }
6332
6333 static void brightness_shutdown(void)
6334 {
6335         tpacpi_brightness_checkpoint_nvram();
6336 }
6337
6338 static void brightness_exit(void)
6339 {
6340         if (ibm_backlight_device) {
6341                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6342                             "calling backlight_device_unregister()\n");
6343                 backlight_device_unregister(ibm_backlight_device);
6344         }
6345
6346         tpacpi_brightness_checkpoint_nvram();
6347 }
6348
6349 static int brightness_read(struct seq_file *m)
6350 {
6351         int level;
6352
6353         level = brightness_get(NULL);
6354         if (level < 0) {
6355                 seq_printf(m, "level:\t\tunreadable\n");
6356         } else {
6357                 seq_printf(m, "level:\t\t%d\n", level);
6358                 seq_printf(m, "commands:\tup, down\n");
6359                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6360                                bright_maxlvl);
6361         }
6362
6363         return 0;
6364 }
6365
6366 static int brightness_write(char *buf)
6367 {
6368         int level;
6369         int rc;
6370         char *cmd;
6371
6372         level = brightness_get(NULL);
6373         if (level < 0)
6374                 return level;
6375
6376         while ((cmd = next_cmd(&buf))) {
6377                 if (strlencmp(cmd, "up") == 0) {
6378                         if (level < bright_maxlvl)
6379                                 level++;
6380                 } else if (strlencmp(cmd, "down") == 0) {
6381                         if (level > 0)
6382                                 level--;
6383                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6384                            level >= 0 && level <= bright_maxlvl) {
6385                         /* new level set */
6386                 } else
6387                         return -EINVAL;
6388         }
6389
6390         tpacpi_disclose_usertask("procfs brightness",
6391                         "set level to %d\n", level);
6392
6393         /*
6394          * Now we know what the final level should be, so we try to set it.
6395          * Doing it this way makes the syscall restartable in case of EINTR
6396          */
6397         rc = brightness_set(level);
6398         if (!rc && ibm_backlight_device)
6399                 backlight_force_update(ibm_backlight_device,
6400                                         BACKLIGHT_UPDATE_SYSFS);
6401         return (rc == -EINTR)? -ERESTARTSYS : rc;
6402 }
6403
6404 static struct ibm_struct brightness_driver_data = {
6405         .name = "brightness",
6406         .read = brightness_read,
6407         .write = brightness_write,
6408         .exit = brightness_exit,
6409         .suspend = brightness_suspend,
6410         .shutdown = brightness_shutdown,
6411 };
6412
6413 /*************************************************************************
6414  * Volume subdriver
6415  */
6416
6417 /*
6418  * IBM ThinkPads have a simple volume controller with MUTE gating.
6419  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6420  *
6421  * Since the *61 series (and probably also the later *60 series), Lenovo
6422  * ThinkPads only implement the MUTE gate.
6423  *
6424  * EC register 0x30
6425  *   Bit 6: MUTE (1 mutes sound)
6426  *   Bit 3-0: Volume
6427  *   Other bits should be zero as far as we know.
6428  *
6429  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6430  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6431  * such as bit 7 which is used to detect repeated presses of MUTE,
6432  * and we leave them unchanged.
6433  */
6434
6435 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6436
6437 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
6438 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6439 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6440
6441 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6442 static char *alsa_id = "ThinkPadEC";
6443 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6444
6445 struct tpacpi_alsa_data {
6446         struct snd_card *card;
6447         struct snd_ctl_elem_id *ctl_mute_id;
6448         struct snd_ctl_elem_id *ctl_vol_id;
6449 };
6450
6451 static struct snd_card *alsa_card;
6452
6453 enum {
6454         TP_EC_AUDIO = 0x30,
6455
6456         /* TP_EC_AUDIO bits */
6457         TP_EC_AUDIO_MUTESW = 6,
6458
6459         /* TP_EC_AUDIO bitmasks */
6460         TP_EC_AUDIO_LVL_MSK = 0x0F,
6461         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6462
6463         /* Maximum volume */
6464         TP_EC_VOLUME_MAX = 14,
6465 };
6466
6467 enum tpacpi_volume_access_mode {
6468         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6469         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6470         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6471         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6472         TPACPI_VOL_MODE_MAX
6473 };
6474
6475 enum tpacpi_volume_capabilities {
6476         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6477         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6478         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6479         TPACPI_VOL_CAP_MAX
6480 };
6481
6482 static enum tpacpi_volume_access_mode volume_mode =
6483         TPACPI_VOL_MODE_MAX;
6484
6485 static enum tpacpi_volume_capabilities volume_capabilities;
6486 static bool volume_control_allowed;
6487
6488 /*
6489  * Used to syncronize writers to TP_EC_AUDIO and
6490  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6491  */
6492 static struct mutex volume_mutex;
6493
6494 static void tpacpi_volume_checkpoint_nvram(void)
6495 {
6496         u8 lec = 0;
6497         u8 b_nvram;
6498         u8 ec_mask;
6499
6500         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6501                 return;
6502         if (!volume_control_allowed)
6503                 return;
6504
6505         vdbg_printk(TPACPI_DBG_MIXER,
6506                 "trying to checkpoint mixer state to NVRAM...\n");
6507
6508         if (tp_features.mixer_no_level_control)
6509                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6510         else
6511                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6512
6513         if (mutex_lock_killable(&volume_mutex) < 0)
6514                 return;
6515
6516         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6517                 goto unlock;
6518         lec &= ec_mask;
6519         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6520
6521         if (lec != (b_nvram & ec_mask)) {
6522                 /* NVRAM needs update */
6523                 b_nvram &= ~ec_mask;
6524                 b_nvram |= lec;
6525                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6526                 dbg_printk(TPACPI_DBG_MIXER,
6527                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6528                            (unsigned int) lec, (unsigned int) b_nvram);
6529         } else {
6530                 vdbg_printk(TPACPI_DBG_MIXER,
6531                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6532                            (unsigned int) lec, (unsigned int) b_nvram);
6533         }
6534
6535 unlock:
6536         mutex_unlock(&volume_mutex);
6537 }
6538
6539 static int volume_get_status_ec(u8 *status)
6540 {
6541         u8 s;
6542
6543         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6544                 return -EIO;
6545
6546         *status = s;
6547
6548         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6549
6550         return 0;
6551 }
6552
6553 static int volume_get_status(u8 *status)
6554 {
6555         return volume_get_status_ec(status);
6556 }
6557
6558 static int volume_set_status_ec(const u8 status)
6559 {
6560         if (!acpi_ec_write(TP_EC_AUDIO, status))
6561                 return -EIO;
6562
6563         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6564
6565         return 0;
6566 }
6567
6568 static int volume_set_status(const u8 status)
6569 {
6570         return volume_set_status_ec(status);
6571 }
6572
6573 /* returns < 0 on error, 0 on no change, 1 on change */
6574 static int __volume_set_mute_ec(const bool mute)
6575 {
6576         int rc;
6577         u8 s, n;
6578
6579         if (mutex_lock_killable(&volume_mutex) < 0)
6580                 return -EINTR;
6581
6582         rc = volume_get_status_ec(&s);
6583         if (rc)
6584                 goto unlock;
6585
6586         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6587                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6588
6589         if (n != s) {
6590                 rc = volume_set_status_ec(n);
6591                 if (!rc)
6592                         rc = 1;
6593         }
6594
6595 unlock:
6596         mutex_unlock(&volume_mutex);
6597         return rc;
6598 }
6599
6600 static int volume_alsa_set_mute(const bool mute)
6601 {
6602         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6603                    (mute) ? "" : "un");
6604         return __volume_set_mute_ec(mute);
6605 }
6606
6607 static int volume_set_mute(const bool mute)
6608 {
6609         int rc;
6610
6611         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6612                    (mute) ? "" : "un");
6613
6614         rc = __volume_set_mute_ec(mute);
6615         return (rc < 0) ? rc : 0;
6616 }
6617
6618 /* returns < 0 on error, 0 on no change, 1 on change */
6619 static int __volume_set_volume_ec(const u8 vol)
6620 {
6621         int rc;
6622         u8 s, n;
6623
6624         if (vol > TP_EC_VOLUME_MAX)
6625                 return -EINVAL;
6626
6627         if (mutex_lock_killable(&volume_mutex) < 0)
6628                 return -EINTR;
6629
6630         rc = volume_get_status_ec(&s);
6631         if (rc)
6632                 goto unlock;
6633
6634         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6635
6636         if (n != s) {
6637                 rc = volume_set_status_ec(n);
6638                 if (!rc)
6639                         rc = 1;
6640         }
6641
6642 unlock:
6643         mutex_unlock(&volume_mutex);
6644         return rc;
6645 }
6646
6647 static int volume_alsa_set_volume(const u8 vol)
6648 {
6649         dbg_printk(TPACPI_DBG_MIXER,
6650                    "ALSA: trying to set volume level to %hu\n", vol);
6651         return __volume_set_volume_ec(vol);
6652 }
6653
6654 static void volume_alsa_notify_change(void)
6655 {
6656         struct tpacpi_alsa_data *d;
6657
6658         if (alsa_card && alsa_card->private_data) {
6659                 d = alsa_card->private_data;
6660                 if (d->ctl_mute_id)
6661                         snd_ctl_notify(alsa_card,
6662                                         SNDRV_CTL_EVENT_MASK_VALUE,
6663                                         d->ctl_mute_id);
6664                 if (d->ctl_vol_id)
6665                         snd_ctl_notify(alsa_card,
6666                                         SNDRV_CTL_EVENT_MASK_VALUE,
6667                                         d->ctl_vol_id);
6668         }
6669 }
6670
6671 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6672                                 struct snd_ctl_elem_info *uinfo)
6673 {
6674         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6675         uinfo->count = 1;
6676         uinfo->value.integer.min = 0;
6677         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6678         return 0;
6679 }
6680
6681 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6682                                 struct snd_ctl_elem_value *ucontrol)
6683 {
6684         u8 s;
6685         int rc;
6686
6687         rc = volume_get_status(&s);
6688         if (rc < 0)
6689                 return rc;
6690
6691         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6692         return 0;
6693 }
6694
6695 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6696                                 struct snd_ctl_elem_value *ucontrol)
6697 {
6698         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6699                                  ucontrol->value.integer.value[0]);
6700         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6701 }
6702
6703 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6704
6705 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6706                                 struct snd_ctl_elem_value *ucontrol)
6707 {
6708         u8 s;
6709         int rc;
6710
6711         rc = volume_get_status(&s);
6712         if (rc < 0)
6713                 return rc;
6714
6715         ucontrol->value.integer.value[0] =
6716                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6717         return 0;
6718 }
6719
6720 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6721                                 struct snd_ctl_elem_value *ucontrol)
6722 {
6723         tpacpi_disclose_usertask("ALSA", "%smute\n",
6724                                  ucontrol->value.integer.value[0] ?
6725                                         "un" : "");
6726         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6727 }
6728
6729 static struct snd_kcontrol_new volume_alsa_control_vol = {
6730         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6731         .name = "Console Playback Volume",
6732         .index = 0,
6733         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6734         .info = volume_alsa_vol_info,
6735         .get = volume_alsa_vol_get,
6736 };
6737
6738 static struct snd_kcontrol_new volume_alsa_control_mute = {
6739         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6740         .name = "Console Playback Switch",
6741         .index = 0,
6742         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6743         .info = volume_alsa_mute_info,
6744         .get = volume_alsa_mute_get,
6745 };
6746
6747 static void volume_suspend(void)
6748 {
6749         tpacpi_volume_checkpoint_nvram();
6750 }
6751
6752 static void volume_resume(void)
6753 {
6754         volume_alsa_notify_change();
6755 }
6756
6757 static void volume_shutdown(void)
6758 {
6759         tpacpi_volume_checkpoint_nvram();
6760 }
6761
6762 static void volume_exit(void)
6763 {
6764         if (alsa_card) {
6765                 snd_card_free(alsa_card);
6766                 alsa_card = NULL;
6767         }
6768
6769         tpacpi_volume_checkpoint_nvram();
6770 }
6771
6772 static int __init volume_create_alsa_mixer(void)
6773 {
6774         struct snd_card *card;
6775         struct tpacpi_alsa_data *data;
6776         struct snd_kcontrol *ctl_vol;
6777         struct snd_kcontrol *ctl_mute;
6778         int rc;
6779
6780         rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6781                             sizeof(struct tpacpi_alsa_data), &card);
6782         if (rc < 0 || !card) {
6783                 pr_err("Failed to create ALSA card structures: %d\n", rc);
6784                 return 1;
6785         }
6786
6787         BUG_ON(!card->private_data);
6788         data = card->private_data;
6789         data->card = card;
6790
6791         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6792                 sizeof(card->driver));
6793         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6794                 sizeof(card->shortname));
6795         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6796                  (thinkpad_id.ec_version_str) ?
6797                         thinkpad_id.ec_version_str : "(unknown)");
6798         snprintf(card->longname, sizeof(card->longname),
6799                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6800                  (thinkpad_id.ec_version_str) ?
6801                         thinkpad_id.ec_version_str : "unknown");
6802
6803         if (volume_control_allowed) {
6804                 volume_alsa_control_vol.put = volume_alsa_vol_put;
6805                 volume_alsa_control_vol.access =
6806                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6807
6808                 volume_alsa_control_mute.put = volume_alsa_mute_put;
6809                 volume_alsa_control_mute.access =
6810                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6811         }
6812
6813         if (!tp_features.mixer_no_level_control) {
6814                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6815                 rc = snd_ctl_add(card, ctl_vol);
6816                 if (rc < 0) {
6817                         pr_err("Failed to create ALSA volume control: %d\n",
6818                                rc);
6819                         goto err_exit;
6820                 }
6821                 data->ctl_vol_id = &ctl_vol->id;
6822         }
6823
6824         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6825         rc = snd_ctl_add(card, ctl_mute);
6826         if (rc < 0) {
6827                 pr_err("Failed to create ALSA mute control: %d\n", rc);
6828                 goto err_exit;
6829         }
6830         data->ctl_mute_id = &ctl_mute->id;
6831
6832         snd_card_set_dev(card, &tpacpi_pdev->dev);
6833         rc = snd_card_register(card);
6834         if (rc < 0) {
6835                 pr_err("Failed to register ALSA card: %d\n", rc);
6836                 goto err_exit;
6837         }
6838
6839         alsa_card = card;
6840         return 0;
6841
6842 err_exit:
6843         snd_card_free(card);
6844         return 1;
6845 }
6846
6847 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
6848 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
6849
6850 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6851         /* Whitelist volume level on all IBM by default */
6852         { .vendor = PCI_VENDOR_ID_IBM,
6853           .bios   = TPACPI_MATCH_ANY,
6854           .ec     = TPACPI_MATCH_ANY,
6855           .quirks = TPACPI_VOL_Q_LEVEL },
6856
6857         /* Lenovo models with volume control (needs confirmation) */
6858         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6859         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6860         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6861         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6862         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6863         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6864         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6865
6866         /* Whitelist mute-only on all Lenovo by default */
6867         { .vendor = PCI_VENDOR_ID_LENOVO,
6868           .bios   = TPACPI_MATCH_ANY,
6869           .ec     = TPACPI_MATCH_ANY,
6870           .quirks = TPACPI_VOL_Q_MUTEONLY }
6871 };
6872
6873 static int __init volume_init(struct ibm_init_struct *iibm)
6874 {
6875         unsigned long quirks;
6876         int rc;
6877
6878         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6879
6880         mutex_init(&volume_mutex);
6881
6882         /*
6883          * Check for module parameter bogosity, note that we
6884          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6885          * able to detect "unspecified"
6886          */
6887         if (volume_mode > TPACPI_VOL_MODE_MAX)
6888                 return -EINVAL;
6889
6890         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6891                 pr_err("UCMS step volume mode not implemented, "
6892                        "please contact %s\n", TPACPI_MAIL);
6893                 return 1;
6894         }
6895
6896         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6897                 return -EINVAL;
6898
6899         /*
6900          * The ALSA mixer is our primary interface.
6901          * When disabled, don't install the subdriver at all
6902          */
6903         if (!alsa_enable) {
6904                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6905                             "ALSA mixer disabled by parameter, "
6906                             "not loading volume subdriver...\n");
6907                 return 1;
6908         }
6909
6910         quirks = tpacpi_check_quirks(volume_quirk_table,
6911                                      ARRAY_SIZE(volume_quirk_table));
6912
6913         switch (volume_capabilities) {
6914         case TPACPI_VOL_CAP_AUTO:
6915                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6916                         tp_features.mixer_no_level_control = 1;
6917                 else if (quirks & TPACPI_VOL_Q_LEVEL)
6918                         tp_features.mixer_no_level_control = 0;
6919                 else
6920                         return 1; /* no mixer */
6921                 break;
6922         case TPACPI_VOL_CAP_VOLMUTE:
6923                 tp_features.mixer_no_level_control = 0;
6924                 break;
6925         case TPACPI_VOL_CAP_MUTEONLY:
6926                 tp_features.mixer_no_level_control = 1;
6927                 break;
6928         default:
6929                 return 1;
6930         }
6931
6932         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6933                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6934                                 "using user-supplied volume_capabilities=%d\n",
6935                                 volume_capabilities);
6936
6937         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6938             volume_mode == TPACPI_VOL_MODE_MAX) {
6939                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6940
6941                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6942                                 "driver auto-selected volume_mode=%d\n",
6943                                 volume_mode);
6944         } else {
6945                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6946                                 "using user-supplied volume_mode=%d\n",
6947                                 volume_mode);
6948         }
6949
6950         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6951                         "mute is supported, volume control is %s\n",
6952                         str_supported(!tp_features.mixer_no_level_control));
6953
6954         rc = volume_create_alsa_mixer();
6955         if (rc) {
6956                 pr_err("Could not create the ALSA mixer interface\n");
6957                 return rc;
6958         }
6959
6960         pr_info("Console audio control enabled, mode: %s\n",
6961                 (volume_control_allowed) ?
6962                         "override (read/write)" :
6963                         "monitor (read only)");
6964
6965         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6966                 "registering volume hotkeys as change notification\n");
6967         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6968                         | TP_ACPI_HKEY_VOLUP_MASK
6969                         | TP_ACPI_HKEY_VOLDWN_MASK
6970                         | TP_ACPI_HKEY_MUTE_MASK);
6971
6972         return 0;
6973 }
6974
6975 static int volume_read(struct seq_file *m)
6976 {
6977         u8 status;
6978
6979         if (volume_get_status(&status) < 0) {
6980                 seq_printf(m, "level:\t\tunreadable\n");
6981         } else {
6982                 if (tp_features.mixer_no_level_control)
6983                         seq_printf(m, "level:\t\tunsupported\n");
6984                 else
6985                         seq_printf(m, "level:\t\t%d\n",
6986                                         status & TP_EC_AUDIO_LVL_MSK);
6987
6988                 seq_printf(m, "mute:\t\t%s\n",
6989                                 onoff(status, TP_EC_AUDIO_MUTESW));
6990
6991                 if (volume_control_allowed) {
6992                         seq_printf(m, "commands:\tunmute, mute\n");
6993                         if (!tp_features.mixer_no_level_control) {
6994                                 seq_printf(m,
6995                                                "commands:\tup, down\n");
6996                                 seq_printf(m,
6997                                                "commands:\tlevel <level>"
6998                                                " (<level> is 0-%d)\n",
6999                                                TP_EC_VOLUME_MAX);
7000                         }
7001                 }
7002         }
7003
7004         return 0;
7005 }
7006
7007 static int volume_write(char *buf)
7008 {
7009         u8 s;
7010         u8 new_level, new_mute;
7011         int l;
7012         char *cmd;
7013         int rc;
7014
7015         /*
7016          * We do allow volume control at driver startup, so that the
7017          * user can set initial state through the volume=... parameter hack.
7018          */
7019         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7020                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7021                         tp_warned.volume_ctrl_forbidden = 1;
7022                         pr_notice("Console audio control in monitor mode, "
7023                                   "changes are not allowed\n");
7024                         pr_notice("Use the volume_control=1 module parameter "
7025                                   "to enable volume control\n");
7026                 }
7027                 return -EPERM;
7028         }
7029
7030         rc = volume_get_status(&s);
7031         if (rc < 0)
7032                 return rc;
7033
7034         new_level = s & TP_EC_AUDIO_LVL_MSK;
7035         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7036
7037         while ((cmd = next_cmd(&buf))) {
7038                 if (!tp_features.mixer_no_level_control) {
7039                         if (strlencmp(cmd, "up") == 0) {
7040                                 if (new_mute)
7041                                         new_mute = 0;
7042                                 else if (new_level < TP_EC_VOLUME_MAX)
7043                                         new_level++;
7044                                 continue;
7045                         } else if (strlencmp(cmd, "down") == 0) {
7046                                 if (new_mute)
7047                                         new_mute = 0;
7048                                 else if (new_level > 0)
7049                                         new_level--;
7050                                 continue;
7051                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7052                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7053                                         new_level = l;
7054                                 continue;
7055                         }
7056                 }
7057                 if (strlencmp(cmd, "mute") == 0)
7058                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7059                 else if (strlencmp(cmd, "unmute") == 0)
7060                         new_mute = 0;
7061                 else
7062                         return -EINVAL;
7063         }
7064
7065         if (tp_features.mixer_no_level_control) {
7066                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7067                                         new_mute ? "" : "un");
7068                 rc = volume_set_mute(!!new_mute);
7069         } else {
7070                 tpacpi_disclose_usertask("procfs volume",
7071                                         "%smute and set level to %d\n",
7072                                         new_mute ? "" : "un", new_level);
7073                 rc = volume_set_status(new_mute | new_level);
7074         }
7075         volume_alsa_notify_change();
7076
7077         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7078 }
7079
7080 static struct ibm_struct volume_driver_data = {
7081         .name = "volume",
7082         .read = volume_read,
7083         .write = volume_write,
7084         .exit = volume_exit,
7085         .suspend = volume_suspend,
7086         .resume = volume_resume,
7087         .shutdown = volume_shutdown,
7088 };
7089
7090 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7091
7092 #define alsa_card NULL
7093
7094 static void inline volume_alsa_notify_change(void)
7095 {
7096 }
7097
7098 static int __init volume_init(struct ibm_init_struct *iibm)
7099 {
7100         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7101
7102         return 1;
7103 }
7104
7105 static struct ibm_struct volume_driver_data = {
7106         .name = "volume",
7107 };
7108
7109 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7110
7111 /*************************************************************************
7112  * Fan subdriver
7113  */
7114
7115 /*
7116  * FAN ACCESS MODES
7117  *
7118  * TPACPI_FAN_RD_ACPI_GFAN:
7119  *      ACPI GFAN method: returns fan level
7120  *
7121  *      see TPACPI_FAN_WR_ACPI_SFAN
7122  *      EC 0x2f (HFSP) not available if GFAN exists
7123  *
7124  * TPACPI_FAN_WR_ACPI_SFAN:
7125  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7126  *
7127  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7128  *      it for writing.
7129  *
7130  * TPACPI_FAN_WR_TPEC:
7131  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7132  *      Supported on almost all ThinkPads
7133  *
7134  *      Fan speed changes of any sort (including those caused by the
7135  *      disengaged mode) are usually done slowly by the firmware as the
7136  *      maximum amount of fan duty cycle change per second seems to be
7137  *      limited.
7138  *
7139  *      Reading is not available if GFAN exists.
7140  *      Writing is not available if SFAN exists.
7141  *
7142  *      Bits
7143  *       7      automatic mode engaged;
7144  *              (default operation mode of the ThinkPad)
7145  *              fan level is ignored in this mode.
7146  *       6      full speed mode (takes precedence over bit 7);
7147  *              not available on all thinkpads.  May disable
7148  *              the tachometer while the fan controller ramps up
7149  *              the speed (which can take up to a few *minutes*).
7150  *              Speeds up fan to 100% duty-cycle, which is far above
7151  *              the standard RPM levels.  It is not impossible that
7152  *              it could cause hardware damage.
7153  *      5-3     unused in some models.  Extra bits for fan level
7154  *              in others, but still useless as all values above
7155  *              7 map to the same speed as level 7 in these models.
7156  *      2-0     fan level (0..7 usually)
7157  *                      0x00 = stop
7158  *                      0x07 = max (set when temperatures critical)
7159  *              Some ThinkPads may have other levels, see
7160  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7161  *
7162  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7163  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7164  *      does so, its initial value is meaningless (0x07).
7165  *
7166  *      For firmware bugs, refer to:
7167  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7168  *
7169  *      ----
7170  *
7171  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7172  *      Main fan tachometer reading (in RPM)
7173  *
7174  *      This register is present on all ThinkPads with a new-style EC, and
7175  *      it is known not to be present on the A21m/e, and T22, as there is
7176  *      something else in offset 0x84 according to the ACPI DSDT.  Other
7177  *      ThinkPads from this same time period (and earlier) probably lack the
7178  *      tachometer as well.
7179  *
7180  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7181  *      was never fixed by IBM to report the EC firmware version string
7182  *      probably support the tachometer (like the early X models), so
7183  *      detecting it is quite hard.  We need more data to know for sure.
7184  *
7185  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7186  *      might result.
7187  *
7188  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
7189  *      mode.
7190  *
7191  *      For firmware bugs, refer to:
7192  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7193  *
7194  *      ----
7195  *
7196  *      ThinkPad EC register 0x31 bit 0 (only on select models)
7197  *
7198  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
7199  *      show the speed of the main fan.  When bit 0 of EC register 0x31
7200  *      is one, the tachometer registers show the speed of the auxiliary
7201  *      fan.
7202  *
7203  *      Fan control seems to affect both fans, regardless of the state
7204  *      of this bit.
7205  *
7206  *      So far, only the firmware for the X60/X61 non-tablet versions
7207  *      seem to support this (firmware TP-7M).
7208  *
7209  * TPACPI_FAN_WR_ACPI_FANS:
7210  *      ThinkPad X31, X40, X41.  Not available in the X60.
7211  *
7212  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
7213  *      high speed.  ACPI DSDT seems to map these three speeds to levels
7214  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7215  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7216  *
7217  *      The speeds are stored on handles
7218  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7219  *
7220  *      There are three default speed sets, accessible as handles:
7221  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7222  *
7223  *      ACPI DSDT switches which set is in use depending on various
7224  *      factors.
7225  *
7226  *      TPACPI_FAN_WR_TPEC is also available and should be used to
7227  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7228  *      but the ACPI tables just mention level 7.
7229  */
7230
7231 enum {                                  /* Fan control constants */
7232         fan_status_offset = 0x2f,       /* EC register 0x2f */
7233         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
7234                                          * 0x84 must be read before 0x85 */
7235         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
7236                                            bit 0 selects which fan is active */
7237
7238         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
7239         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
7240
7241         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
7242 };
7243
7244 enum fan_status_access_mode {
7245         TPACPI_FAN_NONE = 0,            /* No fan status or control */
7246         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
7247         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7248 };
7249
7250 enum fan_control_access_mode {
7251         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
7252         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
7253         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
7254         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
7255 };
7256
7257 enum fan_control_commands {
7258         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
7259         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
7260         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
7261                                                  * and also watchdog cmd */
7262 };
7263
7264 static bool fan_control_allowed;
7265
7266 static enum fan_status_access_mode fan_status_access_mode;
7267 static enum fan_control_access_mode fan_control_access_mode;
7268 static enum fan_control_commands fan_control_commands;
7269
7270 static u8 fan_control_initial_status;
7271 static u8 fan_control_desired_level;
7272 static u8 fan_control_resume_level;
7273 static int fan_watchdog_maxinterval;
7274
7275 static struct mutex fan_mutex;
7276
7277 static void fan_watchdog_fire(struct work_struct *ignored);
7278 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7279
7280 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
7281 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7282            "\\FSPD",            /* 600e/x, 770e, 770x */
7283            );                   /* all others */
7284 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7285            "JFNS",              /* 770x-JL */
7286            );                   /* all others */
7287
7288 /*
7289  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7290  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7291  * be in auto mode (0x80).
7292  *
7293  * This is corrected by any write to HFSP either by the driver, or
7294  * by the firmware.
7295  *
7296  * We assume 0x07 really means auto mode while this quirk is active,
7297  * as this is far more likely than the ThinkPad being in level 7,
7298  * which is only used by the firmware during thermal emergencies.
7299  *
7300  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7301  * TP-70 (T43, R52), which are known to be buggy.
7302  */
7303
7304 static void fan_quirk1_setup(void)
7305 {
7306         if (fan_control_initial_status == 0x07) {
7307                 pr_notice("fan_init: initial fan status is unknown, "
7308                           "assuming it is in auto mode\n");
7309                 tp_features.fan_ctrl_status_undef = 1;
7310         }
7311 }
7312
7313 static void fan_quirk1_handle(u8 *fan_status)
7314 {
7315         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7316                 if (*fan_status != fan_control_initial_status) {
7317                         /* something changed the HFSP regisnter since
7318                          * driver init time, so it is not undefined
7319                          * anymore */
7320                         tp_features.fan_ctrl_status_undef = 0;
7321                 } else {
7322                         /* Return most likely status. In fact, it
7323                          * might be the only possible status */
7324                         *fan_status = TP_EC_FAN_AUTO;
7325                 }
7326         }
7327 }
7328
7329 /* Select main fan on X60/X61, NOOP on others */
7330 static bool fan_select_fan1(void)
7331 {
7332         if (tp_features.second_fan) {
7333                 u8 val;
7334
7335                 if (ec_read(fan_select_offset, &val) < 0)
7336                         return false;
7337                 val &= 0xFEU;
7338                 if (ec_write(fan_select_offset, val) < 0)
7339                         return false;
7340         }
7341         return true;
7342 }
7343
7344 /* Select secondary fan on X60/X61 */
7345 static bool fan_select_fan2(void)
7346 {
7347         u8 val;
7348
7349         if (!tp_features.second_fan)
7350                 return false;
7351
7352         if (ec_read(fan_select_offset, &val) < 0)
7353                 return false;
7354         val |= 0x01U;
7355         if (ec_write(fan_select_offset, val) < 0)
7356                 return false;
7357
7358         return true;
7359 }
7360
7361 /*
7362  * Call with fan_mutex held
7363  */
7364 static void fan_update_desired_level(u8 status)
7365 {
7366         if ((status &
7367              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7368                 if (status > 7)
7369                         fan_control_desired_level = 7;
7370                 else
7371                         fan_control_desired_level = status;
7372         }
7373 }
7374
7375 static int fan_get_status(u8 *status)
7376 {
7377         u8 s;
7378
7379         /* TODO:
7380          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7381
7382         switch (fan_status_access_mode) {
7383         case TPACPI_FAN_RD_ACPI_GFAN: {
7384                 /* 570, 600e/x, 770e, 770x */
7385                 int res;
7386
7387                 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7388                         return -EIO;
7389
7390                 if (likely(status))
7391                         *status = res & 0x07;
7392
7393                 break;
7394         }
7395         case TPACPI_FAN_RD_TPEC:
7396                 /* all except 570, 600e/x, 770e, 770x */
7397                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7398                         return -EIO;
7399
7400                 if (likely(status)) {
7401                         *status = s;
7402                         fan_quirk1_handle(status);
7403                 }
7404
7405                 break;
7406
7407         default:
7408                 return -ENXIO;
7409         }
7410
7411         return 0;
7412 }
7413
7414 static int fan_get_status_safe(u8 *status)
7415 {
7416         int rc;
7417         u8 s;
7418
7419         if (mutex_lock_killable(&fan_mutex))
7420                 return -ERESTARTSYS;
7421         rc = fan_get_status(&s);
7422         if (!rc)
7423                 fan_update_desired_level(s);
7424         mutex_unlock(&fan_mutex);
7425
7426         if (status)
7427                 *status = s;
7428
7429         return rc;
7430 }
7431
7432 static int fan_get_speed(unsigned int *speed)
7433 {
7434         u8 hi, lo;
7435
7436         switch (fan_status_access_mode) {
7437         case TPACPI_FAN_RD_TPEC:
7438                 /* all except 570, 600e/x, 770e, 770x */
7439                 if (unlikely(!fan_select_fan1()))
7440                         return -EIO;
7441                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7442                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7443                         return -EIO;
7444
7445                 if (likely(speed))
7446                         *speed = (hi << 8) | lo;
7447
7448                 break;
7449
7450         default:
7451                 return -ENXIO;
7452         }
7453
7454         return 0;
7455 }
7456
7457 static int fan2_get_speed(unsigned int *speed)
7458 {
7459         u8 hi, lo;
7460         bool rc;
7461
7462         switch (fan_status_access_mode) {
7463         case TPACPI_FAN_RD_TPEC:
7464                 /* all except 570, 600e/x, 770e, 770x */
7465                 if (unlikely(!fan_select_fan2()))
7466                         return -EIO;
7467                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7468                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7469                 fan_select_fan1(); /* play it safe */
7470                 if (rc)
7471                         return -EIO;
7472
7473                 if (likely(speed))
7474                         *speed = (hi << 8) | lo;
7475
7476                 break;
7477
7478         default:
7479                 return -ENXIO;
7480         }
7481
7482         return 0;
7483 }
7484
7485 static int fan_set_level(int level)
7486 {
7487         if (!fan_control_allowed)
7488                 return -EPERM;
7489
7490         switch (fan_control_access_mode) {
7491         case TPACPI_FAN_WR_ACPI_SFAN:
7492                 if (level >= 0 && level <= 7) {
7493                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7494                                 return -EIO;
7495                 } else
7496                         return -EINVAL;
7497                 break;
7498
7499         case TPACPI_FAN_WR_ACPI_FANS:
7500         case TPACPI_FAN_WR_TPEC:
7501                 if (!(level & TP_EC_FAN_AUTO) &&
7502                     !(level & TP_EC_FAN_FULLSPEED) &&
7503                     ((level < 0) || (level > 7)))
7504                         return -EINVAL;
7505
7506                 /* safety net should the EC not support AUTO
7507                  * or FULLSPEED mode bits and just ignore them */
7508                 if (level & TP_EC_FAN_FULLSPEED)
7509                         level |= 7;     /* safety min speed 7 */
7510                 else if (level & TP_EC_FAN_AUTO)
7511                         level |= 4;     /* safety min speed 4 */
7512
7513                 if (!acpi_ec_write(fan_status_offset, level))
7514                         return -EIO;
7515                 else
7516                         tp_features.fan_ctrl_status_undef = 0;
7517                 break;
7518
7519         default:
7520                 return -ENXIO;
7521         }
7522
7523         vdbg_printk(TPACPI_DBG_FAN,
7524                 "fan control: set fan control register to 0x%02x\n", level);
7525         return 0;
7526 }
7527
7528 static int fan_set_level_safe(int level)
7529 {
7530         int rc;
7531
7532         if (!fan_control_allowed)
7533                 return -EPERM;
7534
7535         if (mutex_lock_killable(&fan_mutex))
7536                 return -ERESTARTSYS;
7537
7538         if (level == TPACPI_FAN_LAST_LEVEL)
7539                 level = fan_control_desired_level;
7540
7541         rc = fan_set_level(level);
7542         if (!rc)
7543                 fan_update_desired_level(level);
7544
7545         mutex_unlock(&fan_mutex);
7546         return rc;
7547 }
7548
7549 static int fan_set_enable(void)
7550 {
7551         u8 s;
7552         int rc;
7553
7554         if (!fan_control_allowed)
7555                 return -EPERM;
7556
7557         if (mutex_lock_killable(&fan_mutex))
7558                 return -ERESTARTSYS;
7559
7560         switch (fan_control_access_mode) {
7561         case TPACPI_FAN_WR_ACPI_FANS:
7562         case TPACPI_FAN_WR_TPEC:
7563                 rc = fan_get_status(&s);
7564                 if (rc < 0)
7565                         break;
7566
7567                 /* Don't go out of emergency fan mode */
7568                 if (s != 7) {
7569                         s &= 0x07;
7570                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7571                 }
7572
7573                 if (!acpi_ec_write(fan_status_offset, s))
7574                         rc = -EIO;
7575                 else {
7576                         tp_features.fan_ctrl_status_undef = 0;
7577                         rc = 0;
7578                 }
7579                 break;
7580
7581         case TPACPI_FAN_WR_ACPI_SFAN:
7582                 rc = fan_get_status(&s);
7583                 if (rc < 0)
7584                         break;
7585
7586                 s &= 0x07;
7587
7588                 /* Set fan to at least level 4 */
7589                 s |= 4;
7590
7591                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7592                         rc = -EIO;
7593                 else
7594                         rc = 0;
7595                 break;
7596
7597         default:
7598                 rc = -ENXIO;
7599         }
7600
7601         mutex_unlock(&fan_mutex);
7602
7603         if (!rc)
7604                 vdbg_printk(TPACPI_DBG_FAN,
7605                         "fan control: set fan control register to 0x%02x\n",
7606                         s);
7607         return rc;
7608 }
7609
7610 static int fan_set_disable(void)
7611 {
7612         int rc;
7613
7614         if (!fan_control_allowed)
7615                 return -EPERM;
7616
7617         if (mutex_lock_killable(&fan_mutex))
7618                 return -ERESTARTSYS;
7619
7620         rc = 0;
7621         switch (fan_control_access_mode) {
7622         case TPACPI_FAN_WR_ACPI_FANS:
7623         case TPACPI_FAN_WR_TPEC:
7624                 if (!acpi_ec_write(fan_status_offset, 0x00))
7625                         rc = -EIO;
7626                 else {
7627                         fan_control_desired_level = 0;
7628                         tp_features.fan_ctrl_status_undef = 0;
7629                 }
7630                 break;
7631
7632         case TPACPI_FAN_WR_ACPI_SFAN:
7633                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7634                         rc = -EIO;
7635                 else
7636                         fan_control_desired_level = 0;
7637                 break;
7638
7639         default:
7640                 rc = -ENXIO;
7641         }
7642
7643         if (!rc)
7644                 vdbg_printk(TPACPI_DBG_FAN,
7645                         "fan control: set fan control register to 0\n");
7646
7647         mutex_unlock(&fan_mutex);
7648         return rc;
7649 }
7650
7651 static int fan_set_speed(int speed)
7652 {
7653         int rc;
7654
7655         if (!fan_control_allowed)
7656                 return -EPERM;
7657
7658         if (mutex_lock_killable(&fan_mutex))
7659                 return -ERESTARTSYS;
7660
7661         rc = 0;
7662         switch (fan_control_access_mode) {
7663         case TPACPI_FAN_WR_ACPI_FANS:
7664                 if (speed >= 0 && speed <= 65535) {
7665                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7666                                         speed, speed, speed))
7667                                 rc = -EIO;
7668                 } else
7669                         rc = -EINVAL;
7670                 break;
7671
7672         default:
7673                 rc = -ENXIO;
7674         }
7675
7676         mutex_unlock(&fan_mutex);
7677         return rc;
7678 }
7679
7680 static void fan_watchdog_reset(void)
7681 {
7682         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7683                 return;
7684
7685         if (fan_watchdog_maxinterval > 0 &&
7686             tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7687                 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7688                         msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7689         else
7690                 cancel_delayed_work(&fan_watchdog_task);
7691 }
7692
7693 static void fan_watchdog_fire(struct work_struct *ignored)
7694 {
7695         int rc;
7696
7697         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7698                 return;
7699
7700         pr_notice("fan watchdog: enabling fan\n");
7701         rc = fan_set_enable();
7702         if (rc < 0) {
7703                 pr_err("fan watchdog: error %d while enabling fan, "
7704                        "will try again later...\n", -rc);
7705                 /* reschedule for later */
7706                 fan_watchdog_reset();
7707         }
7708 }
7709
7710 /*
7711  * SYSFS fan layout: hwmon compatible (device)
7712  *
7713  * pwm*_enable:
7714  *      0: "disengaged" mode
7715  *      1: manual mode
7716  *      2: native EC "auto" mode (recommended, hardware default)
7717  *
7718  * pwm*: set speed in manual mode, ignored otherwise.
7719  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7720  *      interpolation.
7721  *
7722  * fan*_input: tachometer reading, RPM
7723  *
7724  *
7725  * SYSFS fan layout: extensions
7726  *
7727  * fan_watchdog (driver):
7728  *      fan watchdog interval in seconds, 0 disables (default), max 120
7729  */
7730
7731 /* sysfs fan pwm1_enable ----------------------------------------------- */
7732 static ssize_t fan_pwm1_enable_show(struct device *dev,
7733                                     struct device_attribute *attr,
7734                                     char *buf)
7735 {
7736         int res, mode;
7737         u8 status;
7738
7739         res = fan_get_status_safe(&status);
7740         if (res)
7741                 return res;
7742
7743         if (status & TP_EC_FAN_FULLSPEED) {
7744                 mode = 0;
7745         } else if (status & TP_EC_FAN_AUTO) {
7746                 mode = 2;
7747         } else
7748                 mode = 1;
7749
7750         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7751 }
7752
7753 static ssize_t fan_pwm1_enable_store(struct device *dev,
7754                                      struct device_attribute *attr,
7755                                      const char *buf, size_t count)
7756 {
7757         unsigned long t;
7758         int res, level;
7759
7760         if (parse_strtoul(buf, 2, &t))
7761                 return -EINVAL;
7762
7763         tpacpi_disclose_usertask("hwmon pwm1_enable",
7764                         "set fan mode to %lu\n", t);
7765
7766         switch (t) {
7767         case 0:
7768                 level = TP_EC_FAN_FULLSPEED;
7769                 break;
7770         case 1:
7771                 level = TPACPI_FAN_LAST_LEVEL;
7772                 break;
7773         case 2:
7774                 level = TP_EC_FAN_AUTO;
7775                 break;
7776         case 3:
7777                 /* reserved for software-controlled auto mode */
7778                 return -ENOSYS;
7779         default:
7780                 return -EINVAL;
7781         }
7782
7783         res = fan_set_level_safe(level);
7784         if (res == -ENXIO)
7785                 return -EINVAL;
7786         else if (res < 0)
7787                 return res;
7788
7789         fan_watchdog_reset();
7790
7791         return count;
7792 }
7793
7794 static struct device_attribute dev_attr_fan_pwm1_enable =
7795         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7796                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7797
7798 /* sysfs fan pwm1 ------------------------------------------------------ */
7799 static ssize_t fan_pwm1_show(struct device *dev,
7800                              struct device_attribute *attr,
7801                              char *buf)
7802 {
7803         int res;
7804         u8 status;
7805
7806         res = fan_get_status_safe(&status);
7807         if (res)
7808                 return res;
7809
7810         if ((status &
7811              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7812                 status = fan_control_desired_level;
7813
7814         if (status > 7)
7815                 status = 7;
7816
7817         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7818 }
7819
7820 static ssize_t fan_pwm1_store(struct device *dev,
7821                               struct device_attribute *attr,
7822                               const char *buf, size_t count)
7823 {
7824         unsigned long s;
7825         int rc;
7826         u8 status, newlevel;
7827
7828         if (parse_strtoul(buf, 255, &s))
7829                 return -EINVAL;
7830
7831         tpacpi_disclose_usertask("hwmon pwm1",
7832                         "set fan speed to %lu\n", s);
7833
7834         /* scale down from 0-255 to 0-7 */
7835         newlevel = (s >> 5) & 0x07;
7836
7837         if (mutex_lock_killable(&fan_mutex))
7838                 return -ERESTARTSYS;
7839
7840         rc = fan_get_status(&status);
7841         if (!rc && (status &
7842                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7843                 rc = fan_set_level(newlevel);
7844                 if (rc == -ENXIO)
7845                         rc = -EINVAL;
7846                 else if (!rc) {
7847                         fan_update_desired_level(newlevel);
7848                         fan_watchdog_reset();
7849                 }
7850         }
7851
7852         mutex_unlock(&fan_mutex);
7853         return (rc)? rc : count;
7854 }
7855
7856 static struct device_attribute dev_attr_fan_pwm1 =
7857         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7858                 fan_pwm1_show, fan_pwm1_store);
7859
7860 /* sysfs fan fan1_input ------------------------------------------------ */
7861 static ssize_t fan_fan1_input_show(struct device *dev,
7862                            struct device_attribute *attr,
7863                            char *buf)
7864 {
7865         int res;
7866         unsigned int speed;
7867
7868         res = fan_get_speed(&speed);
7869         if (res < 0)
7870                 return res;
7871
7872         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7873 }
7874
7875 static struct device_attribute dev_attr_fan_fan1_input =
7876         __ATTR(fan1_input, S_IRUGO,
7877                 fan_fan1_input_show, NULL);
7878
7879 /* sysfs fan fan2_input ------------------------------------------------ */
7880 static ssize_t fan_fan2_input_show(struct device *dev,
7881                            struct device_attribute *attr,
7882                            char *buf)
7883 {
7884         int res;
7885         unsigned int speed;
7886
7887         res = fan2_get_speed(&speed);
7888         if (res < 0)
7889                 return res;
7890
7891         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7892 }
7893
7894 static struct device_attribute dev_attr_fan_fan2_input =
7895         __ATTR(fan2_input, S_IRUGO,
7896                 fan_fan2_input_show, NULL);
7897
7898 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7899 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7900                                      char *buf)
7901 {
7902         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7903 }
7904
7905 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7906                                       const char *buf, size_t count)
7907 {
7908         unsigned long t;
7909
7910         if (parse_strtoul(buf, 120, &t))
7911                 return -EINVAL;
7912
7913         if (!fan_control_allowed)
7914                 return -EPERM;
7915
7916         fan_watchdog_maxinterval = t;
7917         fan_watchdog_reset();
7918
7919         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7920
7921         return count;
7922 }
7923
7924 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7925                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7926
7927 /* --------------------------------------------------------------------- */
7928 static struct attribute *fan_attributes[] = {
7929         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7930         &dev_attr_fan_fan1_input.attr,
7931         NULL, /* for fan2_input */
7932         NULL
7933 };
7934
7935 static const struct attribute_group fan_attr_group = {
7936         .attrs = fan_attributes,
7937 };
7938
7939 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7940 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7941
7942 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7943         { .vendor = PCI_VENDOR_ID_IBM,          \
7944           .bios = TPACPI_MATCH_ANY,             \
7945           .ec = TPID(__id1, __id2),             \
7946           .quirks = __quirks }
7947
7948 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7949         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7950           .bios = TPACPI_MATCH_ANY,             \
7951           .ec = TPID(__id1, __id2),             \
7952           .quirks = __quirks }
7953
7954 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7955         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7956         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7957         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7958         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7959         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7960 };
7961
7962 #undef TPACPI_FAN_QL
7963 #undef TPACPI_FAN_QI
7964
7965 static int __init fan_init(struct ibm_init_struct *iibm)
7966 {
7967         int rc;
7968         unsigned long quirks;
7969
7970         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7971                         "initializing fan subdriver\n");
7972
7973         mutex_init(&fan_mutex);
7974         fan_status_access_mode = TPACPI_FAN_NONE;
7975         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7976         fan_control_commands = 0;
7977         fan_watchdog_maxinterval = 0;
7978         tp_features.fan_ctrl_status_undef = 0;
7979         tp_features.second_fan = 0;
7980         fan_control_desired_level = 7;
7981
7982         if (tpacpi_is_ibm()) {
7983                 TPACPI_ACPIHANDLE_INIT(fans);
7984                 TPACPI_ACPIHANDLE_INIT(gfan);
7985                 TPACPI_ACPIHANDLE_INIT(sfan);
7986         }
7987
7988         quirks = tpacpi_check_quirks(fan_quirk_table,
7989                                      ARRAY_SIZE(fan_quirk_table));
7990
7991         if (gfan_handle) {
7992                 /* 570, 600e/x, 770e, 770x */
7993                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7994         } else {
7995                 /* all other ThinkPads: note that even old-style
7996                  * ThinkPad ECs supports the fan control register */
7997                 if (likely(acpi_ec_read(fan_status_offset,
7998                                         &fan_control_initial_status))) {
7999                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8000                         if (quirks & TPACPI_FAN_Q1)
8001                                 fan_quirk1_setup();
8002                         if (quirks & TPACPI_FAN_2FAN) {
8003                                 tp_features.second_fan = 1;
8004                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8005                                         "secondary fan support enabled\n");
8006                         }
8007                 } else {
8008                         pr_err("ThinkPad ACPI EC access misbehaving, "
8009                                "fan status and control unavailable\n");
8010                         return 1;
8011                 }
8012         }
8013
8014         if (sfan_handle) {
8015                 /* 570, 770x-JL */
8016                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8017                 fan_control_commands |=
8018                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8019         } else {
8020                 if (!gfan_handle) {
8021                         /* gfan without sfan means no fan control */
8022                         /* all other models implement TP EC 0x2f control */
8023
8024                         if (fans_handle) {
8025                                 /* X31, X40, X41 */
8026                                 fan_control_access_mode =
8027                                     TPACPI_FAN_WR_ACPI_FANS;
8028                                 fan_control_commands |=
8029                                     TPACPI_FAN_CMD_SPEED |
8030                                     TPACPI_FAN_CMD_LEVEL |
8031                                     TPACPI_FAN_CMD_ENABLE;
8032                         } else {
8033                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8034                                 fan_control_commands |=
8035                                     TPACPI_FAN_CMD_LEVEL |
8036                                     TPACPI_FAN_CMD_ENABLE;
8037                         }
8038                 }
8039         }
8040
8041         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8042                 "fan is %s, modes %d, %d\n",
8043                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8044                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8045                 fan_status_access_mode, fan_control_access_mode);
8046
8047         /* fan control master switch */
8048         if (!fan_control_allowed) {
8049                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8050                 fan_control_commands = 0;
8051                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8052                            "fan control features disabled by parameter\n");
8053         }
8054
8055         /* update fan_control_desired_level */
8056         if (fan_status_access_mode != TPACPI_FAN_NONE)
8057                 fan_get_status_safe(NULL);
8058
8059         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8060             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8061                 if (tp_features.second_fan) {
8062                         /* attach second fan tachometer */
8063                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8064                                         &dev_attr_fan_fan2_input.attr;
8065                 }
8066                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8067                                          &fan_attr_group);
8068                 if (rc < 0)
8069                         return rc;
8070
8071                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8072                                         &driver_attr_fan_watchdog);
8073                 if (rc < 0) {
8074                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8075                                         &fan_attr_group);
8076                         return rc;
8077                 }
8078                 return 0;
8079         } else
8080                 return 1;
8081 }
8082
8083 static void fan_exit(void)
8084 {
8085         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8086                     "cancelling any pending fan watchdog tasks\n");
8087
8088         /* FIXME: can we really do this unconditionally? */
8089         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8090         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8091                            &driver_attr_fan_watchdog);
8092
8093         cancel_delayed_work(&fan_watchdog_task);
8094         flush_workqueue(tpacpi_wq);
8095 }
8096
8097 static void fan_suspend(void)
8098 {
8099         int rc;
8100
8101         if (!fan_control_allowed)
8102                 return;
8103
8104         /* Store fan status in cache */
8105         fan_control_resume_level = 0;
8106         rc = fan_get_status_safe(&fan_control_resume_level);
8107         if (rc < 0)
8108                 pr_notice("failed to read fan level for later "
8109                           "restore during resume: %d\n", rc);
8110
8111         /* if it is undefined, don't attempt to restore it.
8112          * KEEP THIS LAST */
8113         if (tp_features.fan_ctrl_status_undef)
8114                 fan_control_resume_level = 0;
8115 }
8116
8117 static void fan_resume(void)
8118 {
8119         u8 current_level = 7;
8120         bool do_set = false;
8121         int rc;
8122
8123         /* DSDT *always* updates status on resume */
8124         tp_features.fan_ctrl_status_undef = 0;
8125
8126         if (!fan_control_allowed ||
8127             !fan_control_resume_level ||
8128             (fan_get_status_safe(&current_level) < 0))
8129                 return;
8130
8131         switch (fan_control_access_mode) {
8132         case TPACPI_FAN_WR_ACPI_SFAN:
8133                 /* never decrease fan level */
8134                 do_set = (fan_control_resume_level > current_level);
8135                 break;
8136         case TPACPI_FAN_WR_ACPI_FANS:
8137         case TPACPI_FAN_WR_TPEC:
8138                 /* never decrease fan level, scale is:
8139                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8140                  *
8141                  * We expect the firmware to set either 7 or AUTO, but we
8142                  * handle FULLSPEED out of paranoia.
8143                  *
8144                  * So, we can safely only restore FULLSPEED or 7, anything
8145                  * else could slow the fan.  Restoring AUTO is useless, at
8146                  * best that's exactly what the DSDT already set (it is the
8147                  * slower it uses).
8148                  *
8149                  * Always keep in mind that the DSDT *will* have set the
8150                  * fans to what the vendor supposes is the best level.  We
8151                  * muck with it only to speed the fan up.
8152                  */
8153                 if (fan_control_resume_level != 7 &&
8154                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8155                         return;
8156                 else
8157                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8158                                  (current_level != fan_control_resume_level);
8159                 break;
8160         default:
8161                 return;
8162         }
8163         if (do_set) {
8164                 pr_notice("restoring fan level to 0x%02x\n",
8165                           fan_control_resume_level);
8166                 rc = fan_set_level_safe(fan_control_resume_level);
8167                 if (rc < 0)
8168                         pr_notice("failed to restore fan level: %d\n", rc);
8169         }
8170 }
8171
8172 static int fan_read(struct seq_file *m)
8173 {
8174         int rc;
8175         u8 status;
8176         unsigned int speed = 0;
8177
8178         switch (fan_status_access_mode) {
8179         case TPACPI_FAN_RD_ACPI_GFAN:
8180                 /* 570, 600e/x, 770e, 770x */
8181                 rc = fan_get_status_safe(&status);
8182                 if (rc < 0)
8183                         return rc;
8184
8185                 seq_printf(m, "status:\t\t%s\n"
8186                                "level:\t\t%d\n",
8187                                (status != 0) ? "enabled" : "disabled", status);
8188                 break;
8189
8190         case TPACPI_FAN_RD_TPEC:
8191                 /* all except 570, 600e/x, 770e, 770x */
8192                 rc = fan_get_status_safe(&status);
8193                 if (rc < 0)
8194                         return rc;
8195
8196                 seq_printf(m, "status:\t\t%s\n",
8197                                (status != 0) ? "enabled" : "disabled");
8198
8199                 rc = fan_get_speed(&speed);
8200                 if (rc < 0)
8201                         return rc;
8202
8203                 seq_printf(m, "speed:\t\t%d\n", speed);
8204
8205                 if (status & TP_EC_FAN_FULLSPEED)
8206                         /* Disengaged mode takes precedence */
8207                         seq_printf(m, "level:\t\tdisengaged\n");
8208                 else if (status & TP_EC_FAN_AUTO)
8209                         seq_printf(m, "level:\t\tauto\n");
8210                 else
8211                         seq_printf(m, "level:\t\t%d\n", status);
8212                 break;
8213
8214         case TPACPI_FAN_NONE:
8215         default:
8216                 seq_printf(m, "status:\t\tnot supported\n");
8217         }
8218
8219         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8220                 seq_printf(m, "commands:\tlevel <level>");
8221
8222                 switch (fan_control_access_mode) {
8223                 case TPACPI_FAN_WR_ACPI_SFAN:
8224                         seq_printf(m, " (<level> is 0-7)\n");
8225                         break;
8226
8227                 default:
8228                         seq_printf(m, " (<level> is 0-7, "
8229                                        "auto, disengaged, full-speed)\n");
8230                         break;
8231                 }
8232         }
8233
8234         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8235                 seq_printf(m, "commands:\tenable, disable\n"
8236                                "commands:\twatchdog <timeout> (<timeout> "
8237                                "is 0 (off), 1-120 (seconds))\n");
8238
8239         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8240                 seq_printf(m, "commands:\tspeed <speed>"
8241                                " (<speed> is 0-65535)\n");
8242
8243         return 0;
8244 }
8245
8246 static int fan_write_cmd_level(const char *cmd, int *rc)
8247 {
8248         int level;
8249
8250         if (strlencmp(cmd, "level auto") == 0)
8251                 level = TP_EC_FAN_AUTO;
8252         else if ((strlencmp(cmd, "level disengaged") == 0) |
8253                         (strlencmp(cmd, "level full-speed") == 0))
8254                 level = TP_EC_FAN_FULLSPEED;
8255         else if (sscanf(cmd, "level %d", &level) != 1)
8256                 return 0;
8257
8258         *rc = fan_set_level_safe(level);
8259         if (*rc == -ENXIO)
8260                 pr_err("level command accepted for unsupported access mode %d\n",
8261                        fan_control_access_mode);
8262         else if (!*rc)
8263                 tpacpi_disclose_usertask("procfs fan",
8264                         "set level to %d\n", level);
8265
8266         return 1;
8267 }
8268
8269 static int fan_write_cmd_enable(const char *cmd, int *rc)
8270 {
8271         if (strlencmp(cmd, "enable") != 0)
8272                 return 0;
8273
8274         *rc = fan_set_enable();
8275         if (*rc == -ENXIO)
8276                 pr_err("enable command accepted for unsupported access mode %d\n",
8277                        fan_control_access_mode);
8278         else if (!*rc)
8279                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8280
8281         return 1;
8282 }
8283
8284 static int fan_write_cmd_disable(const char *cmd, int *rc)
8285 {
8286         if (strlencmp(cmd, "disable") != 0)
8287                 return 0;
8288
8289         *rc = fan_set_disable();
8290         if (*rc == -ENXIO)
8291                 pr_err("disable command accepted for unsupported access mode %d\n",
8292                        fan_control_access_mode);
8293         else if (!*rc)
8294                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8295
8296         return 1;
8297 }
8298
8299 static int fan_write_cmd_speed(const char *cmd, int *rc)
8300 {
8301         int speed;
8302
8303         /* TODO:
8304          * Support speed <low> <medium> <high> ? */
8305
8306         if (sscanf(cmd, "speed %d", &speed) != 1)
8307                 return 0;
8308
8309         *rc = fan_set_speed(speed);
8310         if (*rc == -ENXIO)
8311                 pr_err("speed command accepted for unsupported access mode %d\n",
8312                        fan_control_access_mode);
8313         else if (!*rc)
8314                 tpacpi_disclose_usertask("procfs fan",
8315                         "set speed to %d\n", speed);
8316
8317         return 1;
8318 }
8319
8320 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8321 {
8322         int interval;
8323
8324         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8325                 return 0;
8326
8327         if (interval < 0 || interval > 120)
8328                 *rc = -EINVAL;
8329         else {
8330                 fan_watchdog_maxinterval = interval;
8331                 tpacpi_disclose_usertask("procfs fan",
8332                         "set watchdog timer to %d\n",
8333                         interval);
8334         }
8335
8336         return 1;
8337 }
8338
8339 static int fan_write(char *buf)
8340 {
8341         char *cmd;
8342         int rc = 0;
8343
8344         while (!rc && (cmd = next_cmd(&buf))) {
8345                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8346                       fan_write_cmd_level(cmd, &rc)) &&
8347                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8348                       (fan_write_cmd_enable(cmd, &rc) ||
8349                        fan_write_cmd_disable(cmd, &rc) ||
8350                        fan_write_cmd_watchdog(cmd, &rc))) &&
8351                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8352                       fan_write_cmd_speed(cmd, &rc))
8353                     )
8354                         rc = -EINVAL;
8355                 else if (!rc)
8356                         fan_watchdog_reset();
8357         }
8358
8359         return rc;
8360 }
8361
8362 static struct ibm_struct fan_driver_data = {
8363         .name = "fan",
8364         .read = fan_read,
8365         .write = fan_write,
8366         .exit = fan_exit,
8367         .suspend = fan_suspend,
8368         .resume = fan_resume,
8369 };
8370
8371 /****************************************************************************
8372  ****************************************************************************
8373  *
8374  * Infrastructure
8375  *
8376  ****************************************************************************
8377  ****************************************************************************/
8378
8379 /*
8380  * HKEY event callout for other subdrivers go here
8381  * (yes, it is ugly, but it is quick, safe, and gets the job done
8382  */
8383 static void tpacpi_driver_event(const unsigned int hkey_event)
8384 {
8385         if (ibm_backlight_device) {
8386                 switch (hkey_event) {
8387                 case TP_HKEY_EV_BRGHT_UP:
8388                 case TP_HKEY_EV_BRGHT_DOWN:
8389                         tpacpi_brightness_notify_change();
8390                 }
8391         }
8392         if (alsa_card) {
8393                 switch (hkey_event) {
8394                 case TP_HKEY_EV_VOL_UP:
8395                 case TP_HKEY_EV_VOL_DOWN:
8396                 case TP_HKEY_EV_VOL_MUTE:
8397                         volume_alsa_notify_change();
8398                 }
8399         }
8400 }
8401
8402 static void hotkey_driver_event(const unsigned int scancode)
8403 {
8404         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8405 }
8406
8407 /* sysfs name ---------------------------------------------------------- */
8408 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8409                            struct device_attribute *attr,
8410                            char *buf)
8411 {
8412         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8413 }
8414
8415 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8416         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8417
8418 /* --------------------------------------------------------------------- */
8419
8420 /* /proc support */
8421 static struct proc_dir_entry *proc_dir;
8422
8423 /*
8424  * Module and infrastructure proble, init and exit handling
8425  */
8426
8427 static bool force_load;
8428
8429 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8430 static const char * __init str_supported(int is_supported)
8431 {
8432         static char text_unsupported[] __initdata = "not supported";
8433
8434         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8435 }
8436 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8437
8438 static void ibm_exit(struct ibm_struct *ibm)
8439 {
8440         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8441
8442         list_del_init(&ibm->all_drivers);
8443
8444         if (ibm->flags.acpi_notify_installed) {
8445                 dbg_printk(TPACPI_DBG_EXIT,
8446                         "%s: acpi_remove_notify_handler\n", ibm->name);
8447                 BUG_ON(!ibm->acpi);
8448                 acpi_remove_notify_handler(*ibm->acpi->handle,
8449                                            ibm->acpi->type,
8450                                            dispatch_acpi_notify);
8451                 ibm->flags.acpi_notify_installed = 0;
8452         }
8453
8454         if (ibm->flags.proc_created) {
8455                 dbg_printk(TPACPI_DBG_EXIT,
8456                         "%s: remove_proc_entry\n", ibm->name);
8457                 remove_proc_entry(ibm->name, proc_dir);
8458                 ibm->flags.proc_created = 0;
8459         }
8460
8461         if (ibm->flags.acpi_driver_registered) {
8462                 dbg_printk(TPACPI_DBG_EXIT,
8463                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8464                 BUG_ON(!ibm->acpi);
8465                 acpi_bus_unregister_driver(ibm->acpi->driver);
8466                 kfree(ibm->acpi->driver);
8467                 ibm->acpi->driver = NULL;
8468                 ibm->flags.acpi_driver_registered = 0;
8469         }
8470
8471         if (ibm->flags.init_called && ibm->exit) {
8472                 ibm->exit();
8473                 ibm->flags.init_called = 0;
8474         }
8475
8476         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8477 }
8478
8479 static int __init ibm_init(struct ibm_init_struct *iibm)
8480 {
8481         int ret;
8482         struct ibm_struct *ibm = iibm->data;
8483         struct proc_dir_entry *entry;
8484
8485         BUG_ON(ibm == NULL);
8486
8487         INIT_LIST_HEAD(&ibm->all_drivers);
8488
8489         if (ibm->flags.experimental && !experimental)
8490                 return 0;
8491
8492         dbg_printk(TPACPI_DBG_INIT,
8493                 "probing for %s\n", ibm->name);
8494
8495         if (iibm->init) {
8496                 ret = iibm->init(iibm);
8497                 if (ret > 0)
8498                         return 0;       /* probe failed */
8499                 if (ret)
8500                         return ret;
8501
8502                 ibm->flags.init_called = 1;
8503         }
8504
8505         if (ibm->acpi) {
8506                 if (ibm->acpi->hid) {
8507                         ret = register_tpacpi_subdriver(ibm);
8508                         if (ret)
8509                                 goto err_out;
8510                 }
8511
8512                 if (ibm->acpi->notify) {
8513                         ret = setup_acpi_notify(ibm);
8514                         if (ret == -ENODEV) {
8515                                 pr_notice("disabling subdriver %s\n",
8516                                           ibm->name);
8517                                 ret = 0;
8518                                 goto err_out;
8519                         }
8520                         if (ret < 0)
8521                                 goto err_out;
8522                 }
8523         }
8524
8525         dbg_printk(TPACPI_DBG_INIT,
8526                 "%s installed\n", ibm->name);
8527
8528         if (ibm->read) {
8529                 umode_t mode = iibm->base_procfs_mode;
8530
8531                 if (!mode)
8532                         mode = S_IRUGO;
8533                 if (ibm->write)
8534                         mode |= S_IWUSR;
8535                 entry = proc_create_data(ibm->name, mode, proc_dir,
8536                                          &dispatch_proc_fops, ibm);
8537                 if (!entry) {
8538                         pr_err("unable to create proc entry %s\n", ibm->name);
8539                         ret = -ENODEV;
8540                         goto err_out;
8541                 }
8542                 ibm->flags.proc_created = 1;
8543         }
8544
8545         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8546
8547         return 0;
8548
8549 err_out:
8550         dbg_printk(TPACPI_DBG_INIT,
8551                 "%s: at error exit path with result %d\n",
8552                 ibm->name, ret);
8553
8554         ibm_exit(ibm);
8555         return (ret < 0)? ret : 0;
8556 }
8557
8558 /* Probing */
8559
8560 static bool __pure __init tpacpi_is_fw_digit(const char c)
8561 {
8562         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8563 }
8564
8565 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8566 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8567                                                 const char t)
8568 {
8569         return s && strlen(s) >= 8 &&
8570                 tpacpi_is_fw_digit(s[0]) &&
8571                 tpacpi_is_fw_digit(s[1]) &&
8572                 s[2] == t &&
8573                 (s[3] == 'T' || s[3] == 'N') &&
8574                 tpacpi_is_fw_digit(s[4]) &&
8575                 tpacpi_is_fw_digit(s[5]);
8576 }
8577
8578 /* returns 0 - probe ok, or < 0 - probe error.
8579  * Probe ok doesn't mean thinkpad found.
8580  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8581 static int __must_check __init get_thinkpad_model_data(
8582                                                 struct thinkpad_id_data *tp)
8583 {
8584         const struct dmi_device *dev = NULL;
8585         char ec_fw_string[18];
8586         char const *s;
8587
8588         if (!tp)
8589                 return -EINVAL;
8590
8591         memset(tp, 0, sizeof(*tp));
8592
8593         if (dmi_name_in_vendors("IBM"))
8594                 tp->vendor = PCI_VENDOR_ID_IBM;
8595         else if (dmi_name_in_vendors("LENOVO"))
8596                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8597         else
8598                 return 0;
8599
8600         s = dmi_get_system_info(DMI_BIOS_VERSION);
8601         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8602         if (s && !tp->bios_version_str)
8603                 return -ENOMEM;
8604
8605         /* Really ancient ThinkPad 240X will fail this, which is fine */
8606         if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8607               tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8608                 return 0;
8609
8610         tp->bios_model = tp->bios_version_str[0]
8611                          | (tp->bios_version_str[1] << 8);
8612         tp->bios_release = (tp->bios_version_str[4] << 8)
8613                          | tp->bios_version_str[5];
8614
8615         /*
8616          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8617          * X32 or newer, all Z series;  Some models must have an
8618          * up-to-date BIOS or they will not be detected.
8619          *
8620          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8621          */
8622         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8623                 if (sscanf(dev->name,
8624                            "IBM ThinkPad Embedded Controller -[%17c",
8625                            ec_fw_string) == 1) {
8626                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8627                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8628
8629                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8630                         if (!tp->ec_version_str)
8631                                 return -ENOMEM;
8632
8633                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8634                                 tp->ec_model = ec_fw_string[0]
8635                                                 | (ec_fw_string[1] << 8);
8636                                 tp->ec_release = (ec_fw_string[4] << 8)
8637                                                 | ec_fw_string[5];
8638                         } else {
8639                                 pr_notice("ThinkPad firmware release %s "
8640                                           "doesn't match the known patterns\n",
8641                                           ec_fw_string);
8642                                 pr_notice("please report this to %s\n",
8643                                           TPACPI_MAIL);
8644                         }
8645                         break;
8646                 }
8647         }
8648
8649         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8650         if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8651                 tp->model_str = kstrdup(s, GFP_KERNEL);
8652                 if (!tp->model_str)
8653                         return -ENOMEM;
8654         } else {
8655                 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8656                 if (s && !(strnicmp(s, "Lenovo", 6))) {
8657                         tp->model_str = kstrdup(s, GFP_KERNEL);
8658                         if (!tp->model_str)
8659                                 return -ENOMEM;
8660                 }
8661         }
8662
8663         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8664         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8665         if (s && !tp->nummodel_str)
8666                 return -ENOMEM;
8667
8668         return 0;
8669 }
8670
8671 static int __init probe_for_thinkpad(void)
8672 {
8673         int is_thinkpad;
8674
8675         if (acpi_disabled)
8676                 return -ENODEV;
8677
8678         /* It would be dangerous to run the driver in this case */
8679         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8680                 return -ENODEV;
8681
8682         /*
8683          * Non-ancient models have better DMI tagging, but very old models
8684          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8685          */
8686         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8687                       (thinkpad_id.ec_model != 0) ||
8688                       tpacpi_is_fw_known();
8689
8690         /* The EC handler is required */
8691         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8692         if (!ec_handle) {
8693                 if (is_thinkpad)
8694                         pr_err("Not yet supported ThinkPad detected!\n");
8695                 return -ENODEV;
8696         }
8697
8698         if (!is_thinkpad && !force_load)
8699                 return -ENODEV;
8700
8701         return 0;
8702 }
8703
8704 static void __init thinkpad_acpi_init_banner(void)
8705 {
8706         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8707         pr_info("%s\n", TPACPI_URL);
8708
8709         pr_info("ThinkPad BIOS %s, EC %s\n",
8710                 (thinkpad_id.bios_version_str) ?
8711                         thinkpad_id.bios_version_str : "unknown",
8712                 (thinkpad_id.ec_version_str) ?
8713                         thinkpad_id.ec_version_str : "unknown");
8714
8715         BUG_ON(!thinkpad_id.vendor);
8716
8717         if (thinkpad_id.model_str)
8718                 pr_info("%s %s, model %s\n",
8719                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8720                                 "IBM" : ((thinkpad_id.vendor ==
8721                                                 PCI_VENDOR_ID_LENOVO) ?
8722                                         "Lenovo" : "Unknown vendor"),
8723                         thinkpad_id.model_str,
8724                         (thinkpad_id.nummodel_str) ?
8725                                 thinkpad_id.nummodel_str : "unknown");
8726 }
8727
8728 /* Module init, exit, parameters */
8729
8730 static struct ibm_init_struct ibms_init[] __initdata = {
8731         {
8732                 .data = &thinkpad_acpi_driver_data,
8733         },
8734         {
8735                 .init = hotkey_init,
8736                 .data = &hotkey_driver_data,
8737         },
8738         {
8739                 .init = bluetooth_init,
8740                 .data = &bluetooth_driver_data,
8741         },
8742         {
8743                 .init = wan_init,
8744                 .data = &wan_driver_data,
8745         },
8746         {
8747                 .init = uwb_init,
8748                 .data = &uwb_driver_data,
8749         },
8750 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8751         {
8752                 .init = video_init,
8753                 .base_procfs_mode = S_IRUSR,
8754                 .data = &video_driver_data,
8755         },
8756 #endif
8757         {
8758                 .init = light_init,
8759                 .data = &light_driver_data,
8760         },
8761         {
8762                 .init = cmos_init,
8763                 .data = &cmos_driver_data,
8764         },
8765         {
8766                 .init = led_init,
8767                 .data = &led_driver_data,
8768         },
8769         {
8770                 .init = beep_init,
8771                 .data = &beep_driver_data,
8772         },
8773         {
8774                 .init = thermal_init,
8775                 .data = &thermal_driver_data,
8776         },
8777         {
8778                 .init = brightness_init,
8779                 .data = &brightness_driver_data,
8780         },
8781         {
8782                 .init = volume_init,
8783                 .data = &volume_driver_data,
8784         },
8785         {
8786                 .init = fan_init,
8787                 .data = &fan_driver_data,
8788         },
8789 };
8790
8791 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8792 {
8793         unsigned int i;
8794         struct ibm_struct *ibm;
8795
8796         if (!kp || !kp->name || !val)
8797                 return -EINVAL;
8798
8799         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8800                 ibm = ibms_init[i].data;
8801                 WARN_ON(ibm == NULL);
8802
8803                 if (!ibm || !ibm->name)
8804                         continue;
8805
8806                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8807                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8808                                 return -ENOSPC;
8809                         strcpy(ibms_init[i].param, val);
8810                         strcat(ibms_init[i].param, ",");
8811                         return 0;
8812                 }
8813         }
8814
8815         return -EINVAL;
8816 }
8817
8818 module_param(experimental, int, 0444);
8819 MODULE_PARM_DESC(experimental,
8820                  "Enables experimental features when non-zero");
8821
8822 module_param_named(debug, dbg_level, uint, 0);
8823 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8824
8825 module_param(force_load, bool, 0444);
8826 MODULE_PARM_DESC(force_load,
8827                  "Attempts to load the driver even on a "
8828                  "mis-identified ThinkPad when true");
8829
8830 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8831 MODULE_PARM_DESC(fan_control,
8832                  "Enables setting fan parameters features when true");
8833
8834 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8835 MODULE_PARM_DESC(brightness_mode,
8836                  "Selects brightness control strategy: "
8837                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8838
8839 module_param(brightness_enable, uint, 0444);
8840 MODULE_PARM_DESC(brightness_enable,
8841                  "Enables backlight control when 1, disables when 0");
8842
8843 module_param(hotkey_report_mode, uint, 0444);
8844 MODULE_PARM_DESC(hotkey_report_mode,
8845                  "used for backwards compatibility with userspace, "
8846                  "see documentation");
8847
8848 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8849 module_param_named(volume_mode, volume_mode, uint, 0444);
8850 MODULE_PARM_DESC(volume_mode,
8851                  "Selects volume control strategy: "
8852                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8853
8854 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8855 MODULE_PARM_DESC(volume_capabilities,
8856                  "Selects the mixer capabilites: "
8857                  "0=auto, 1=volume and mute, 2=mute only");
8858
8859 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8860 MODULE_PARM_DESC(volume_control,
8861                  "Enables software override for the console audio "
8862                  "control when true");
8863
8864 /* ALSA module API parameters */
8865 module_param_named(index, alsa_index, int, 0444);
8866 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8867 module_param_named(id, alsa_id, charp, 0444);
8868 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8869 module_param_named(enable, alsa_enable, bool, 0444);
8870 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8871 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8872
8873 #define TPACPI_PARAM(feature) \
8874         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8875         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8876                          "at module load, see documentation")
8877
8878 TPACPI_PARAM(hotkey);
8879 TPACPI_PARAM(bluetooth);
8880 TPACPI_PARAM(video);
8881 TPACPI_PARAM(light);
8882 TPACPI_PARAM(cmos);
8883 TPACPI_PARAM(led);
8884 TPACPI_PARAM(beep);
8885 TPACPI_PARAM(brightness);
8886 TPACPI_PARAM(volume);
8887 TPACPI_PARAM(fan);
8888
8889 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8890 module_param(dbg_wlswemul, uint, 0444);
8891 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8892 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8893 MODULE_PARM_DESC(wlsw_state,
8894                  "Initial state of the emulated WLSW switch");
8895
8896 module_param(dbg_bluetoothemul, uint, 0444);
8897 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8898 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8899 MODULE_PARM_DESC(bluetooth_state,
8900                  "Initial state of the emulated bluetooth switch");
8901
8902 module_param(dbg_wwanemul, uint, 0444);
8903 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8904 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8905 MODULE_PARM_DESC(wwan_state,
8906                  "Initial state of the emulated WWAN switch");
8907
8908 module_param(dbg_uwbemul, uint, 0444);
8909 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8910 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8911 MODULE_PARM_DESC(uwb_state,
8912                  "Initial state of the emulated UWB switch");
8913 #endif
8914
8915 static void thinkpad_acpi_module_exit(void)
8916 {
8917         struct ibm_struct *ibm, *itmp;
8918
8919         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8920
8921         list_for_each_entry_safe_reverse(ibm, itmp,
8922                                          &tpacpi_all_drivers,
8923                                          all_drivers) {
8924                 ibm_exit(ibm);
8925         }
8926
8927         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8928
8929         if (tpacpi_inputdev) {
8930                 if (tp_features.input_device_registered)
8931                         input_unregister_device(tpacpi_inputdev);
8932                 else
8933                         input_free_device(tpacpi_inputdev);
8934                 kfree(hotkey_keycode_map);
8935         }
8936
8937         if (tpacpi_hwmon)
8938                 hwmon_device_unregister(tpacpi_hwmon);
8939
8940         if (tp_features.sensors_pdev_attrs_registered)
8941                 device_remove_file(&tpacpi_sensors_pdev->dev,
8942                                    &dev_attr_thinkpad_acpi_pdev_name);
8943         if (tpacpi_sensors_pdev)
8944                 platform_device_unregister(tpacpi_sensors_pdev);
8945         if (tpacpi_pdev)
8946                 platform_device_unregister(tpacpi_pdev);
8947
8948         if (tp_features.sensors_pdrv_attrs_registered)
8949                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8950         if (tp_features.platform_drv_attrs_registered)
8951                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8952
8953         if (tp_features.sensors_pdrv_registered)
8954                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8955
8956         if (tp_features.platform_drv_registered)
8957                 platform_driver_unregister(&tpacpi_pdriver);
8958
8959         if (proc_dir)
8960                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8961
8962         if (tpacpi_wq)
8963                 destroy_workqueue(tpacpi_wq);
8964
8965         kfree(thinkpad_id.bios_version_str);
8966         kfree(thinkpad_id.ec_version_str);
8967         kfree(thinkpad_id.model_str);
8968         kfree(thinkpad_id.nummodel_str);
8969 }
8970
8971
8972 static int __init thinkpad_acpi_module_init(void)
8973 {
8974         int ret, i;
8975
8976         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8977
8978         /* Parameter checking */
8979         if (hotkey_report_mode > 2)
8980                 return -EINVAL;
8981
8982         /* Driver-level probe */
8983
8984         ret = get_thinkpad_model_data(&thinkpad_id);
8985         if (ret) {
8986                 pr_err("unable to get DMI data: %d\n", ret);
8987                 thinkpad_acpi_module_exit();
8988                 return ret;
8989         }
8990         ret = probe_for_thinkpad();
8991         if (ret) {
8992                 thinkpad_acpi_module_exit();
8993                 return ret;
8994         }
8995
8996         /* Driver initialization */
8997
8998         thinkpad_acpi_init_banner();
8999         tpacpi_check_outdated_fw();
9000
9001         TPACPI_ACPIHANDLE_INIT(ecrd);
9002         TPACPI_ACPIHANDLE_INIT(ecwr);
9003
9004         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9005         if (!tpacpi_wq) {
9006                 thinkpad_acpi_module_exit();
9007                 return -ENOMEM;
9008         }
9009
9010         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9011         if (!proc_dir) {
9012                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9013                 thinkpad_acpi_module_exit();
9014                 return -ENODEV;
9015         }
9016
9017         ret = platform_driver_register(&tpacpi_pdriver);
9018         if (ret) {
9019                 pr_err("unable to register main platform driver\n");
9020                 thinkpad_acpi_module_exit();
9021                 return ret;
9022         }
9023         tp_features.platform_drv_registered = 1;
9024
9025         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9026         if (ret) {
9027                 pr_err("unable to register hwmon platform driver\n");
9028                 thinkpad_acpi_module_exit();
9029                 return ret;
9030         }
9031         tp_features.sensors_pdrv_registered = 1;
9032
9033         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9034         if (!ret) {
9035                 tp_features.platform_drv_attrs_registered = 1;
9036                 ret = tpacpi_create_driver_attributes(
9037                                         &tpacpi_hwmon_pdriver.driver);
9038         }
9039         if (ret) {
9040                 pr_err("unable to create sysfs driver attributes\n");
9041                 thinkpad_acpi_module_exit();
9042                 return ret;
9043         }
9044         tp_features.sensors_pdrv_attrs_registered = 1;
9045
9046
9047         /* Device initialization */
9048         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9049                                                         NULL, 0);
9050         if (IS_ERR(tpacpi_pdev)) {
9051                 ret = PTR_ERR(tpacpi_pdev);
9052                 tpacpi_pdev = NULL;
9053                 pr_err("unable to register platform device\n");
9054                 thinkpad_acpi_module_exit();
9055                 return ret;
9056         }
9057         tpacpi_sensors_pdev = platform_device_register_simple(
9058                                                 TPACPI_HWMON_DRVR_NAME,
9059                                                 -1, NULL, 0);
9060         if (IS_ERR(tpacpi_sensors_pdev)) {
9061                 ret = PTR_ERR(tpacpi_sensors_pdev);
9062                 tpacpi_sensors_pdev = NULL;
9063                 pr_err("unable to register hwmon platform device\n");
9064                 thinkpad_acpi_module_exit();
9065                 return ret;
9066         }
9067         ret = device_create_file(&tpacpi_sensors_pdev->dev,
9068                                  &dev_attr_thinkpad_acpi_pdev_name);
9069         if (ret) {
9070                 pr_err("unable to create sysfs hwmon device attributes\n");
9071                 thinkpad_acpi_module_exit();
9072                 return ret;
9073         }
9074         tp_features.sensors_pdev_attrs_registered = 1;
9075         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9076         if (IS_ERR(tpacpi_hwmon)) {
9077                 ret = PTR_ERR(tpacpi_hwmon);
9078                 tpacpi_hwmon = NULL;
9079                 pr_err("unable to register hwmon device\n");
9080                 thinkpad_acpi_module_exit();
9081                 return ret;
9082         }
9083         mutex_init(&tpacpi_inputdev_send_mutex);
9084         tpacpi_inputdev = input_allocate_device();
9085         if (!tpacpi_inputdev) {
9086                 pr_err("unable to allocate input device\n");
9087                 thinkpad_acpi_module_exit();
9088                 return -ENOMEM;
9089         } else {
9090                 /* Prepare input device, but don't register */
9091                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9092                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9093                 tpacpi_inputdev->id.bustype = BUS_HOST;
9094                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9095                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9096                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9097                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9098         }
9099
9100         /* Init subdriver dependencies */
9101         tpacpi_detect_brightness_capabilities();
9102
9103         /* Init subdrivers */
9104         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9105                 ret = ibm_init(&ibms_init[i]);
9106                 if (ret >= 0 && *ibms_init[i].param)
9107                         ret = ibms_init[i].data->write(ibms_init[i].param);
9108                 if (ret < 0) {
9109                         thinkpad_acpi_module_exit();
9110                         return ret;
9111                 }
9112         }
9113
9114         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9115
9116         ret = input_register_device(tpacpi_inputdev);
9117         if (ret < 0) {
9118                 pr_err("unable to register input device\n");
9119                 thinkpad_acpi_module_exit();
9120                 return ret;
9121         } else {
9122                 tp_features.input_device_registered = 1;
9123         }
9124
9125         return 0;
9126 }
9127
9128 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9129
9130 /*
9131  * This will autoload the driver in almost every ThinkPad
9132  * in widespread use.
9133  *
9134  * Only _VERY_ old models, like the 240, 240x and 570 lack
9135  * the HKEY event interface.
9136  */
9137 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9138
9139 /*
9140  * DMI matching for module autoloading
9141  *
9142  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9143  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9144  *
9145  * Only models listed in thinkwiki will be supported, so add yours
9146  * if it is not there yet.
9147  */
9148 #define IBM_BIOS_MODULE_ALIAS(__type) \
9149         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9150
9151 /* Ancient thinkpad BIOSes have to be identified by
9152  * BIOS type or model number, and there are far less
9153  * BIOS types than model numbers... */
9154 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
9155
9156 MODULE_AUTHOR("Borislav Deianov <[email protected]>");
9157 MODULE_AUTHOR("Henrique de Moraes Holschuh <[email protected]>");
9158 MODULE_DESCRIPTION(TPACPI_DESC);
9159 MODULE_VERSION(TPACPI_VERSION);
9160 MODULE_LICENSE("GPL");
9161
9162 module_init(thinkpad_acpi_module_init);
9163 module_exit(thinkpad_acpi_module_exit);