Pileus Git - ~andy/linux/blob - drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define 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 <lentinj@dial.pipex.com>
  42  *
  43  *  2005-01-16  0.9     use MODULE_VERSION
  44  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  45  *                      fix parameter passing on module loading
  46  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  47  *                          thanks to Jim Radford <radford@blackbean.org>
  48  *  2004-11-08  0.8     fix init error case, don't return from a macro
  49  *                          thanks to Chris Wright <chrisw@osdl.org>
  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
 188         /* User-interface events */
 189         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 190         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 191         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 192         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 193         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 194         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 195         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 196
 197         /* Thermal events */
 198         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 199         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 200         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 201         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 202         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 203
 204         /* Misc */
 205         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 206 };
 207
 208 /****************************************************************************
 209  * Main driver
 210  */
 211
 212 #define TPACPI_NAME "thinkpad"
 213 #define TPACPI_DESC "ThinkPad ACPI Extras"
 214 #define TPACPI_FILE TPACPI_NAME "_acpi"
 215 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 216 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 217
 218 #define TPACPI_PROC_DIR "ibm"
 219 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 220 #define TPACPI_DRVR_NAME TPACPI_FILE
 221 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 222 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 223
 224 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 225 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 226
 227 #define TPACPI_MAX_ACPI_ARGS 3
 228
 229 /* Debugging printk groups */
 230 #define TPACPI_DBG_ALL          0xffff
 231 #define TPACPI_DBG_DISCLOSETASK 0x8000
 232 #define TPACPI_DBG_INIT         0x0001
 233 #define TPACPI_DBG_EXIT         0x0002
 234 #define TPACPI_DBG_RFKILL       0x0004
 235 #define TPACPI_DBG_HKEY         0x0008
 236 #define TPACPI_DBG_FAN          0x0010
 237 #define TPACPI_DBG_BRGHT        0x0020
 238 #define TPACPI_DBG_MIXER        0x0040
 239
 240 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 241 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 242 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 243
 244
 245 /****************************************************************************
 246  * Driver-wide structs and misc. variables
 247  */
 248
 249 struct ibm_struct;
 250
 251 struct tp_acpi_drv_struct {
 252         const struct acpi_device_id *hid;
 253         struct acpi_driver *driver;
 254
 255         void (*notify) (struct ibm_struct *, u32);
 256         acpi_handle *handle;
 257         u32 type;
 258         struct acpi_device *device;
 259 };
 260
 261 struct ibm_struct {
 262         char *name;
 263
 264         int (*read) (struct seq_file *);
 265         int (*write) (char *);
 266         void (*exit) (void);
 267         void (*resume) (void);
 268         void (*suspend) (pm_message_t state);
 269         void (*shutdown) (void);
 270
 271         struct list_head all_drivers;
 272
 273         struct tp_acpi_drv_struct *acpi;
 274
 275         struct {
 276                 u8 acpi_driver_registered:1;
 277                 u8 acpi_notify_installed:1;
 278                 u8 proc_created:1;
 279                 u8 init_called:1;
 280                 u8 experimental:1;
 281         } flags;
 282 };
 283
 284 struct ibm_init_struct {
 285         char param[32];
 286
 287         int (*init) (struct ibm_init_struct *);
 288         mode_t base_procfs_mode;
 289         struct ibm_struct *data;
 290 };
 291
 292 static struct {
 293         u32 bluetooth:1;
 294         u32 hotkey:1;
 295         u32 hotkey_mask:1;
 296         u32 hotkey_wlsw:1;
 297         u32 hotkey_tablet:1;
 298         u32 light:1;
 299         u32 light_status:1;
 300         u32 bright_acpimode:1;
 301         u32 bright_unkfw:1;
 302         u32 wan:1;
 303         u32 uwb:1;
 304         u32 fan_ctrl_status_undef:1;
 305         u32 second_fan:1;
 306         u32 beep_needs_two_args:1;
 307         u32 mixer_no_level_control:1;
 308         u32 input_device_registered:1;
 309         u32 platform_drv_registered:1;
 310         u32 platform_drv_attrs_registered:1;
 311         u32 sensors_pdrv_registered:1;
 312         u32 sensors_pdrv_attrs_registered:1;
 313         u32 sensors_pdev_attrs_registered:1;
 314         u32 hotkey_poll_active:1;
 315 } tp_features;
 316
 317 static struct {
 318         u16 hotkey_mask_ff:1;
 319         u16 volume_ctrl_forbidden:1;
 320 } tp_warned;
 321
 322 struct thinkpad_id_data {
 323         unsigned int vendor;    /* ThinkPad vendor:
 324                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 325
 326         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 327         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 328
 329         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 330         u16 ec_model;
 331         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 332         u16 ec_release;
 333
 334         char *model_str;        /* ThinkPad T43 */
 335         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 336 };
 337 static struct thinkpad_id_data thinkpad_id;
 338
 339 static enum {
 340         TPACPI_LIFE_INIT = 0,
 341         TPACPI_LIFE_RUNNING,
 342         TPACPI_LIFE_EXITING,
 343 } tpacpi_lifecycle;
 344
 345 static int experimental;
 346 static u32 dbg_level;
 347
 348 static struct workqueue_struct *tpacpi_wq;
 349
 350 enum led_status_t {
 351         TPACPI_LED_OFF = 0,
 352         TPACPI_LED_ON,
 353         TPACPI_LED_BLINK,
 354 };
 355
 356 /* Special LED class that can defer work */
 357 struct tpacpi_led_classdev {
 358         struct led_classdev led_classdev;
 359         struct work_struct work;
 360         enum led_status_t new_state;
 361         unsigned int led;
 362 };
 363
 364 /* brightness level capabilities */
 365 static unsigned int bright_maxlvl;      /* 0 = unknown */
 366
 367 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 368 static int dbg_wlswemul;
 369 static int tpacpi_wlsw_emulstate;
 370 static int dbg_bluetoothemul;
 371 static int tpacpi_bluetooth_emulstate;
 372 static int dbg_wwanemul;
 373 static int tpacpi_wwan_emulstate;
 374 static int dbg_uwbemul;
 375 static int tpacpi_uwb_emulstate;
 376 #endif
 377
 378
 379 /*************************************************************************
 380  *  Debugging helpers
 381  */
 382
 383 #define dbg_printk(a_dbg_level, format, arg...)                         \
 384 do {                                                                    \
 385         if (dbg_level & (a_dbg_level))                                  \
 386                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 387                        __func__, ##arg);                                \
 388 } while (0)
 389
 390 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 391 #define vdbg_printk dbg_printk
 392 static const char *str_supported(int is_supported);
 393 #else
 394 static inline const char *str_supported(int is_supported) { return ""; }
 395 #define vdbg_printk(a_dbg_level, format, arg...)        \
 396         no_printk(format, ##arg)
 397 #endif
 398
 399 static void tpacpi_log_usertask(const char * const what)
 400 {
 401         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 402                what, task_tgid_vnr(current));
 403 }
 404
 405 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 406 do {                                                                    \
 407         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 408                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 409                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 410                        what, task_tgid_vnr(current), ## arg);           \
 411         }                                                               \
 412 } while (0)
 413
 414 /*
 415  * Quirk handling helpers
 416  *
 417  * ThinkPad IDs and versions seen in the field so far
 418  * are two-characters from the set [0-9A-Z], i.e. base 36.
 419  *
 420  * We use values well outside that range as specials.
 421  */
 422
 423 #define TPACPI_MATCH_ANY                0xffffU
 424 #define TPACPI_MATCH_UNKNOWN            0U
 425
 426 /* TPID('1', 'Y') == 0x5931 */
 427 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 428
 429 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 430         { .vendor = PCI_VENDOR_ID_IBM,          \
 431           .bios = TPID(__id1, __id2),           \
 432           .ec = TPACPI_MATCH_ANY,               \
 433           .quirks = (__quirk) }
 434
 435 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 436         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 437           .bios = TPID(__id1, __id2),           \
 438           .ec = TPACPI_MATCH_ANY,               \
 439           .quirks = (__quirk) }
 440
 441 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 442         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 443           .bios = TPACPI_MATCH_ANY,             \
 444           .ec = TPID(__id1, __id2),             \
 445           .quirks = (__quirk) }
 446
 447 struct tpacpi_quirk {
 448         unsigned int vendor;
 449         u16 bios;
 450         u16 ec;
 451         unsigned long quirks;
 452 };
 453
 454 /**
 455  * tpacpi_check_quirks() - search BIOS/EC version on a list
 456  * @qlist:              array of &struct tpacpi_quirk
 457  * @qlist_size:         number of elements in @qlist
 458  *
 459  * Iterates over a quirks list until one is found that matches the
 460  * ThinkPad's vendor, BIOS and EC model.
 461  *
 462  * Returns 0 if nothing matches, otherwise returns the quirks field of
 463  * the matching &struct tpacpi_quirk entry.
 464  *
 465  * The match criteria is: vendor, ec and bios much match.
 466  */
 467 static unsigned long __init tpacpi_check_quirks(
 468                         const struct tpacpi_quirk *qlist,
 469                         unsigned int qlist_size)
 470 {
 471         while (qlist_size) {
 472                 if ((qlist->vendor == thinkpad_id.vendor ||
 473                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 474                     (qlist->bios == thinkpad_id.bios_model ||
 475                                 qlist->bios == TPACPI_MATCH_ANY) &&
 476                     (qlist->ec == thinkpad_id.ec_model ||
 477                                 qlist->ec == TPACPI_MATCH_ANY))
 478                         return qlist->quirks;
 479
 480                 qlist_size--;
 481                 qlist++;
 482         }
 483         return 0;
 484 }
 485
 486 static inline bool __pure __init tpacpi_is_lenovo(void)
 487 {
 488         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 489 }
 490
 491 static inline bool __pure __init tpacpi_is_ibm(void)
 492 {
 493         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 494 }
 495
 496 /****************************************************************************
 497  ****************************************************************************
 498  *
 499  * ACPI Helpers and device model
 500  *
 501  ****************************************************************************
 502  ****************************************************************************/
 503
 504 /*************************************************************************
 505  * ACPI basic handles
 506  */
 507
 508 static acpi_handle root_handle;
 509 static acpi_handle ec_handle;
 510
 511 #define TPACPI_HANDLE(object, parent, paths...)                 \
 512         static acpi_handle  object##_handle;                    \
 513         static const acpi_handle *object##_parent __initdata =  \
 514                                                 &parent##_handle; \
 515         static char *object##_paths[] __initdata = { paths }
 516
 517 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 518 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 519
 520 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 521                                         /* T4x, X31, X40 */
 522            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 523            "\\CMS",             /* R40, R40e */
 524            );                   /* all others */
 525
 526 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 527            "^HKEY",             /* R30, R31 */
 528            "HKEY",              /* all others */
 529            );                   /* 570 */
 530
 531 /*************************************************************************
 532  * ACPI helpers
 533  */
 534
 535 static int acpi_evalf(acpi_handle handle,
 536                       void *res, char *method, char *fmt, ...)
 537 {
 538         char *fmt0 = fmt;
 539         struct acpi_object_list params;
 540         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 541         struct acpi_buffer result, *resultp;
 542         union acpi_object out_obj;
 543         acpi_status status;
 544         va_list ap;
 545         char res_type;
 546         int success;
 547         int quiet;
 548
 549         if (!*fmt) {
 550                 pr_err("acpi_evalf() called with empty format\n");
 551                 return 0;
 552         }
 553
 554         if (*fmt == 'q') {
 555                 quiet = 1;
 556                 fmt++;
 557         } else
 558                 quiet = 0;
 559
 560         res_type = *(fmt++);
 561
 562         params.count = 0;
 563         params.pointer = &in_objs[0];
 564
 565         va_start(ap, fmt);
 566         while (*fmt) {
 567                 char c = *(fmt++);
 568                 switch (c) {
 569                 case 'd':       /* int */
 570                         in_objs[params.count].integer.value = va_arg(ap, int);
 571                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 572                         break;
 573                         /* add more types as needed */
 574                 default:
 575                         pr_err("acpi_evalf() called "
 576                                "with invalid format character '%c'\n", c);
 577                         va_end(ap);
 578                         return 0;
 579                 }
 580         }
 581         va_end(ap);
 582
 583         if (res_type != 'v') {
 584                 result.length = sizeof(out_obj);
 585                 result.pointer = &out_obj;
 586                 resultp = &result;
 587         } else
 588                 resultp = NULL;
 589
 590         status = acpi_evaluate_object(handle, method, &params, resultp);
 591
 592         switch (res_type) {
 593         case 'd':               /* int */
 594                 success = (status == AE_OK &&
 595                            out_obj.type == ACPI_TYPE_INTEGER);
 596                 if (success && res)
 597                         *(int *)res = out_obj.integer.value;
 598                 break;
 599         case 'v':               /* void */
 600                 success = status == AE_OK;
 601                 break;
 602                 /* add more types as needed */
 603         default:
 604                 pr_err("acpi_evalf() called "
 605                        "with invalid format character '%c'\n", res_type);
 606                 return 0;
 607         }
 608
 609         if (!success && !quiet)
 610                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 611                        method, fmt0, acpi_format_exception(status));
 612
 613         return success;
 614 }
 615
 616 static int acpi_ec_read(int i, u8 *p)
 617 {
 618         int v;
 619
 620         if (ecrd_handle) {
 621                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 622                         return 0;
 623                 *p = v;
 624         } else {
 625                 if (ec_read(i, p) < 0)
 626                         return 0;
 627         }
 628
 629         return 1;
 630 }
 631
 632 static int acpi_ec_write(int i, u8 v)
 633 {
 634         if (ecwr_handle) {
 635                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 636                         return 0;
 637         } else {
 638                 if (ec_write(i, v) < 0)
 639                         return 0;
 640         }
 641
 642         return 1;
 643 }
 644
 645 static int issue_thinkpad_cmos_command(int cmos_cmd)
 646 {
 647         if (!cmos_handle)
 648                 return -ENXIO;
 649
 650         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 651                 return -EIO;
 652
 653         return 0;
 654 }
 655
 656 /*************************************************************************
 657  * ACPI device model
 658  */
 659
 660 #define TPACPI_ACPIHANDLE_INIT(object) \
 661         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 662                 object##_paths, ARRAY_SIZE(object##_paths))
 663
 664 static void __init drv_acpi_handle_init(const char *name,
 665                            acpi_handle *handle, const acpi_handle parent,
 666                            char **paths, const int num_paths)
 667 {
 668         int i;
 669         acpi_status status;
 670
 671         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 672                 name);
 673
 674         for (i = 0; i < num_paths; i++) {
 675                 status = acpi_get_handle(parent, paths[i], handle);
 676                 if (ACPI_SUCCESS(status)) {
 677                         dbg_printk(TPACPI_DBG_INIT,
 678                                    "Found ACPI handle %s for %s\n",
 679                                    paths[i], name);
 680                         return;
 681                 }
 682         }
 683
 684         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 685                     name);
 686         *handle = NULL;
 687 }
 688
 689 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 690                         u32 level, void *context, void **return_value)
 691 {
 692         *(acpi_handle *)return_value = handle;
 693
 694         return AE_CTRL_TERMINATE;
 695 }
 696
 697 static void __init tpacpi_acpi_handle_locate(const char *name,
 698                 const char *hid,
 699                 acpi_handle *handle)
 700 {
 701         acpi_status status;
 702         acpi_handle device_found;
 703
 704         BUG_ON(!name || !hid || !handle);
 705         vdbg_printk(TPACPI_DBG_INIT,
 706                         "trying to locate ACPI handle for %s, using HID %s\n",
 707                         name, hid);
 708
 709         memset(&device_found, 0, sizeof(device_found));
 710         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 711                                   (void *)name, &device_found);
 712
 713         *handle = NULL;
 714
 715         if (ACPI_SUCCESS(status)) {
 716                 *handle = device_found;
 717                 dbg_printk(TPACPI_DBG_INIT,
 718                            "Found ACPI handle for %s\n", name);
 719         } else {
 720                 vdbg_printk(TPACPI_DBG_INIT,
 721                             "Could not locate an ACPI handle for %s: %s\n",
 722                             name, acpi_format_exception(status));
 723         }
 724 }
 725
 726 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 727 {
 728         struct ibm_struct *ibm = data;
 729
 730         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 731                 return;
 732
 733         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 734                 return;
 735
 736         ibm->acpi->notify(ibm, event);
 737 }
 738
 739 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 740 {
 741         acpi_status status;
 742         int rc;
 743
 744         BUG_ON(!ibm->acpi);
 745
 746         if (!*ibm->acpi->handle)
 747                 return 0;
 748
 749         vdbg_printk(TPACPI_DBG_INIT,
 750                 "setting up ACPI notify for %s\n", ibm->name);
 751
 752         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 753         if (rc < 0) {
 754                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 755                 return -ENODEV;
 756         }
 757
 758         ibm->acpi->device->driver_data = ibm;
 759         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 760                 TPACPI_ACPI_EVENT_PREFIX,
 761                 ibm->name);
 762
 763         status = acpi_install_notify_handler(*ibm->acpi->handle,
 764                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 765         if (ACPI_FAILURE(status)) {
 766                 if (status == AE_ALREADY_EXISTS) {
 767                         pr_notice("another device driver is already "
 768                                   "handling %s events\n", ibm->name);
 769                 } else {
 770                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 771                                ibm->name, acpi_format_exception(status));
 772                 }
 773                 return -ENODEV;
 774         }
 775         ibm->flags.acpi_notify_installed = 1;
 776         return 0;
 777 }
 778
 779 static int __init tpacpi_device_add(struct acpi_device *device)
 780 {
 781         return 0;
 782 }
 783
 784 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 785 {
 786         int rc;
 787
 788         dbg_printk(TPACPI_DBG_INIT,
 789                 "registering %s as an ACPI driver\n", ibm->name);
 790
 791         BUG_ON(!ibm->acpi);
 792
 793         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 794         if (!ibm->acpi->driver) {
 795                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 796                 return -ENOMEM;
 797         }
 798
 799         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 800         ibm->acpi->driver->ids = ibm->acpi->hid;
 801
 802         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 803
 804         rc = acpi_bus_register_driver(ibm->acpi->driver);
 805         if (rc < 0) {
 806                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 807                        ibm->name, rc);
 808                 kfree(ibm->acpi->driver);
 809                 ibm->acpi->driver = NULL;
 810         } else if (!rc)
 811                 ibm->flags.acpi_driver_registered = 1;
 812
 813         return rc;
 814 }
 815
 816
 817 /****************************************************************************
 818  ****************************************************************************
 819  *
 820  * Procfs Helpers
 821  *
 822  ****************************************************************************
 823  ****************************************************************************/
 824
 825 static int dispatch_proc_show(struct seq_file *m, void *v)
 826 {
 827         struct ibm_struct *ibm = m->private;
 828
 829         if (!ibm || !ibm->read)
 830                 return -EINVAL;
 831         return ibm->read(m);
 832 }
 833
 834 static int dispatch_proc_open(struct inode *inode, struct file *file)
 835 {
 836         return single_open(file, dispatch_proc_show, PDE(inode)->data);
 837 }
 838
 839 static ssize_t dispatch_proc_write(struct file *file,
 840                         const char __user *userbuf,
 841                         size_t count, loff_t *pos)
 842 {
 843         struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
 844         char *kernbuf;
 845         int ret;
 846
 847         if (!ibm || !ibm->write)
 848                 return -EINVAL;
 849         if (count > PAGE_SIZE - 2)
 850                 return -EINVAL;
 851
 852         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 853         if (!kernbuf)
 854                 return -ENOMEM;
 855
 856         if (copy_from_user(kernbuf, userbuf, count)) {
 857                 kfree(kernbuf);
 858                 return -EFAULT;
 859         }
 860
 861         kernbuf[count] = 0;
 862         strcat(kernbuf, ",");
 863         ret = ibm->write(kernbuf);
 864         if (ret == 0)
 865                 ret = count;
 866
 867         kfree(kernbuf);
 868
 869         return ret;
 870 }
 871
 872 static const struct file_operations dispatch_proc_fops = {
 873         .owner          = THIS_MODULE,
 874         .open           = dispatch_proc_open,
 875         .read           = seq_read,
 876         .llseek         = seq_lseek,
 877         .release        = single_release,
 878         .write          = dispatch_proc_write,
 879 };
 880
 881 static char *next_cmd(char **cmds)
 882 {
 883         char *start = *cmds;
 884         char *end;
 885
 886         while ((end = strchr(start, ',')) && end == start)
 887                 start = end + 1;
 888
 889         if (!end)
 890                 return NULL;
 891
 892         *end = 0;
 893         *cmds = end + 1;
 894         return start;
 895 }
 896
 897
 898 /****************************************************************************
 899  ****************************************************************************
 900  *
 901  * Device model: input, hwmon and platform
 902  *
 903  ****************************************************************************
 904  ****************************************************************************/
 905
 906 static struct platform_device *tpacpi_pdev;
 907 static struct platform_device *tpacpi_sensors_pdev;
 908 static struct device *tpacpi_hwmon;
 909 static struct input_dev *tpacpi_inputdev;
 910 static struct mutex tpacpi_inputdev_send_mutex;
 911 static LIST_HEAD(tpacpi_all_drivers);
 912
 913 static int tpacpi_suspend_handler(struct platform_device *pdev,
 914                                   pm_message_t state)
 915 {
 916         struct ibm_struct *ibm, *itmp;
 917
 918         list_for_each_entry_safe(ibm, itmp,
 919                                  &tpacpi_all_drivers,
 920                                  all_drivers) {
 921                 if (ibm->suspend)
 922                         (ibm->suspend)(state);
 923         }
 924
 925         return 0;
 926 }
 927
 928 static int tpacpi_resume_handler(struct platform_device *pdev)
 929 {
 930         struct ibm_struct *ibm, *itmp;
 931
 932         list_for_each_entry_safe(ibm, itmp,
 933                                  &tpacpi_all_drivers,
 934                                  all_drivers) {
 935                 if (ibm->resume)
 936                         (ibm->resume)();
 937         }
 938
 939         return 0;
 940 }
 941
 942 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 943 {
 944         struct ibm_struct *ibm, *itmp;
 945
 946         list_for_each_entry_safe(ibm, itmp,
 947                                  &tpacpi_all_drivers,
 948                                  all_drivers) {
 949                 if (ibm->shutdown)
 950                         (ibm->shutdown)();
 951         }
 952 }
 953
 954 static struct platform_driver tpacpi_pdriver = {
 955         .driver = {
 956                 .name = TPACPI_DRVR_NAME,
 957                 .owner = THIS_MODULE,
 958         },
 959         .suspend = tpacpi_suspend_handler,
 960         .resume = tpacpi_resume_handler,
 961         .shutdown = tpacpi_shutdown_handler,
 962 };
 963
 964 static struct platform_driver tpacpi_hwmon_pdriver = {
 965         .driver = {
 966                 .name = TPACPI_HWMON_DRVR_NAME,
 967                 .owner = THIS_MODULE,
 968         },
 969 };
 970
 971 /*************************************************************************
 972  * sysfs support helpers
 973  */
 974
 975 struct attribute_set {
 976         unsigned int members, max_members;
 977         struct attribute_group group;
 978 };
 979
 980 struct attribute_set_obj {
 981         struct attribute_set s;
 982         struct attribute *a;
 983 } __attribute__((packed));
 984
 985 static struct attribute_set *create_attr_set(unsigned int max_members,
 986                                                 const char *name)
 987 {
 988         struct attribute_set_obj *sobj;
 989
 990         if (max_members == 0)
 991                 return NULL;
 992
 993         /* Allocates space for implicit NULL at the end too */
 994         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 995                     max_members * sizeof(struct attribute *),
 996                     GFP_KERNEL);
 997         if (!sobj)
 998                 return NULL;
 999         sobj->s.max_members = max_members;
1000         sobj->s.group.attrs = &sobj->a;
1001         sobj->s.group.name = name;
1002
1003         return &sobj->s;
1004 }
1005
1006 #define destroy_attr_set(_set) \
1007         kfree(_set);
1008
1009 /* not multi-threaded safe, use it in a single thread per set */
1010 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1011 {
1012         if (!s || !attr)
1013                 return -EINVAL;
1014
1015         if (s->members >= s->max_members)
1016                 return -ENOMEM;
1017
1018         s->group.attrs[s->members] = attr;
1019         s->members++;
1020
1021         return 0;
1022 }
1023
1024 static int add_many_to_attr_set(struct attribute_set *s,
1025                         struct attribute **attr,
1026                         unsigned int count)
1027 {
1028         int i, res;
1029
1030         for (i = 0; i < count; i++) {
1031                 res = add_to_attr_set(s, attr[i]);
1032                 if (res)
1033                         return res;
1034         }
1035
1036         return 0;
1037 }
1038
1039 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1040 {
1041         sysfs_remove_group(kobj, &s->group);
1042         destroy_attr_set(s);
1043 }
1044
1045 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1046         sysfs_create_group(_kobj, &_attr_set->group)
1047
1048 static int parse_strtoul(const char *buf,
1049                 unsigned long max, unsigned long *value)
1050 {
1051         char *endp;
1052
1053         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1054         endp = skip_spaces(endp);
1055         if (*endp || *value > max)
1056                 return -EINVAL;
1057
1058         return 0;
1059 }
1060
1061 static void tpacpi_disable_brightness_delay(void)
1062 {
1063         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1064                 pr_notice("ACPI backlight control delay disabled\n");
1065 }
1066
1067 static void printk_deprecated_attribute(const char * const what,
1068                                         const char * const details)
1069 {
1070         tpacpi_log_usertask("deprecated sysfs attribute");
1071         pr_warn("WARNING: sysfs attribute %s is deprecated and "
1072                 "will be removed. %s\n",
1073                 what, details);
1074 }
1075
1076 /*************************************************************************
1077  * rfkill and radio control support helpers
1078  */
1079
1080 /*
1081  * ThinkPad-ACPI firmware handling model:
1082  *
1083  * WLSW (master wireless switch) is event-driven, and is common to all
1084  * firmware-controlled radios.  It cannot be controlled, just monitored,
1085  * as expected.  It overrides all radio state in firmware
1086  *
1087  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1088  * (TODO: verify how WLSW interacts with the returned radio state).
1089  *
1090  * The only time there are shadow radio state changes, is when
1091  * masked-off hotkeys are used.
1092  */
1093
1094 /*
1095  * Internal driver API for radio state:
1096  *
1097  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1098  * bool: true means radio blocked (off)
1099  */
1100 enum tpacpi_rfkill_state {
1101         TPACPI_RFK_RADIO_OFF = 0,
1102         TPACPI_RFK_RADIO_ON
1103 };
1104
1105 /* rfkill switches */
1106 enum tpacpi_rfk_id {
1107         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1108         TPACPI_RFK_WWAN_SW_ID,
1109         TPACPI_RFK_UWB_SW_ID,
1110         TPACPI_RFK_SW_MAX
1111 };
1112
1113 static const char *tpacpi_rfkill_names[] = {
1114         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1115         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1116         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1117         [TPACPI_RFK_SW_MAX] = NULL
1118 };
1119
1120 /* ThinkPad-ACPI rfkill subdriver */
1121 struct tpacpi_rfk {
1122         struct rfkill *rfkill;
1123         enum tpacpi_rfk_id id;
1124         const struct tpacpi_rfk_ops *ops;
1125 };
1126
1127 struct tpacpi_rfk_ops {
1128         /* firmware interface */
1129         int (*get_status)(void);
1130         int (*set_status)(const enum tpacpi_rfkill_state);
1131 };
1132
1133 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1134
1135 /* Query FW and update rfkill sw state for a given rfkill switch */
1136 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1137 {
1138         int status;
1139
1140         if (!tp_rfk)
1141                 return -ENODEV;
1142
1143         status = (tp_rfk->ops->get_status)();
1144         if (status < 0)
1145                 return status;
1146
1147         rfkill_set_sw_state(tp_rfk->rfkill,
1148                             (status == TPACPI_RFK_RADIO_OFF));
1149
1150         return status;
1151 }
1152
1153 /* Query FW and update rfkill sw state for all rfkill switches */
1154 static void tpacpi_rfk_update_swstate_all(void)
1155 {
1156         unsigned int i;
1157
1158         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1159                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1160 }
1161
1162 /*
1163  * Sync the HW-blocking state of all rfkill switches,
1164  * do notice it causes the rfkill core to schedule uevents
1165  */
1166 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1167 {
1168         unsigned int i;
1169         struct tpacpi_rfk *tp_rfk;
1170
1171         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1172                 tp_rfk = tpacpi_rfkill_switches[i];
1173                 if (tp_rfk) {
1174                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1175                                                 blocked)) {
1176                                 /* ignore -- we track sw block */
1177                         }
1178                 }
1179         }
1180 }
1181
1182 /* Call to get the WLSW state from the firmware */
1183 static int hotkey_get_wlsw(void);
1184
1185 /* Call to query WLSW state and update all rfkill switches */
1186 static bool tpacpi_rfk_check_hwblock_state(void)
1187 {
1188         int res = hotkey_get_wlsw();
1189         int hw_blocked;
1190
1191         /* When unknown or unsupported, we have to assume it is unblocked */
1192         if (res < 0)
1193                 return false;
1194
1195         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1196         tpacpi_rfk_update_hwblock_state(hw_blocked);
1197
1198         return hw_blocked;
1199 }
1200
1201 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1202 {
1203         struct tpacpi_rfk *tp_rfk = data;
1204         int res;
1205
1206         dbg_printk(TPACPI_DBG_RFKILL,
1207                    "request to change radio state to %s\n",
1208                    blocked ? "blocked" : "unblocked");
1209
1210         /* try to set radio state */
1211         res = (tp_rfk->ops->set_status)(blocked ?
1212                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1213
1214         /* and update the rfkill core with whatever the FW really did */
1215         tpacpi_rfk_update_swstate(tp_rfk);
1216
1217         return (res < 0) ? res : 0;
1218 }
1219
1220 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1221         .set_block = tpacpi_rfk_hook_set_block,
1222 };
1223
1224 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1225                         const struct tpacpi_rfk_ops *tp_rfkops,
1226                         const enum rfkill_type rfktype,
1227                         const char *name,
1228                         const bool set_default)
1229 {
1230         struct tpacpi_rfk *atp_rfk;
1231         int res;
1232         bool sw_state = false;
1233         bool hw_state;
1234         int sw_status;
1235
1236         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1237
1238         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1239         if (atp_rfk)
1240                 atp_rfk->rfkill = rfkill_alloc(name,
1241                                                 &tpacpi_pdev->dev,
1242                                                 rfktype,
1243                                                 &tpacpi_rfk_rfkill_ops,
1244                                                 atp_rfk);
1245         if (!atp_rfk || !atp_rfk->rfkill) {
1246                 pr_err("failed to allocate memory for rfkill class\n");
1247                 kfree(atp_rfk);
1248                 return -ENOMEM;
1249         }
1250
1251         atp_rfk->id = id;
1252         atp_rfk->ops = tp_rfkops;
1253
1254         sw_status = (tp_rfkops->get_status)();
1255         if (sw_status < 0) {
1256                 pr_err("failed to read initial state for %s, error %d\n",
1257                        name, sw_status);
1258         } else {
1259                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1260                 if (set_default) {
1261                         /* try to keep the initial state, since we ask the
1262                          * firmware to preserve it across S5 in NVRAM */
1263                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1264                 }
1265         }
1266         hw_state = tpacpi_rfk_check_hwblock_state();
1267         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1268
1269         res = rfkill_register(atp_rfk->rfkill);
1270         if (res < 0) {
1271                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1272                 rfkill_destroy(atp_rfk->rfkill);
1273                 kfree(atp_rfk);
1274                 return res;
1275         }
1276
1277         tpacpi_rfkill_switches[id] = atp_rfk;
1278
1279         pr_info("rfkill switch %s: radio is %sblocked\n",
1280                 name, (sw_state || hw_state) ? "" : "un");
1281         return 0;
1282 }
1283
1284 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1285 {
1286         struct tpacpi_rfk *tp_rfk;
1287
1288         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1289
1290         tp_rfk = tpacpi_rfkill_switches[id];
1291         if (tp_rfk) {
1292                 rfkill_unregister(tp_rfk->rfkill);
1293                 rfkill_destroy(tp_rfk->rfkill);
1294                 tpacpi_rfkill_switches[id] = NULL;
1295                 kfree(tp_rfk);
1296         }
1297 }
1298
1299 static void printk_deprecated_rfkill_attribute(const char * const what)
1300 {
1301         printk_deprecated_attribute(what,
1302                         "Please switch to generic rfkill before year 2010");
1303 }
1304
1305 /* sysfs <radio> enable ------------------------------------------------ */
1306 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1307                                             struct device_attribute *attr,
1308                                             char *buf)
1309 {
1310         int status;
1311
1312         printk_deprecated_rfkill_attribute(attr->attr.name);
1313
1314         /* This is in the ABI... */
1315         if (tpacpi_rfk_check_hwblock_state()) {
1316                 status = TPACPI_RFK_RADIO_OFF;
1317         } else {
1318                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1319                 if (status < 0)
1320                         return status;
1321         }
1322
1323         return snprintf(buf, PAGE_SIZE, "%d\n",
1324                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1325 }
1326
1327 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1328                             struct device_attribute *attr,
1329                             const char *buf, size_t count)
1330 {
1331         unsigned long t;
1332         int res;
1333
1334         printk_deprecated_rfkill_attribute(attr->attr.name);
1335
1336         if (parse_strtoul(buf, 1, &t))
1337                 return -EINVAL;
1338
1339         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1340
1341         /* This is in the ABI... */
1342         if (tpacpi_rfk_check_hwblock_state() && !!t)
1343                 return -EPERM;
1344
1345         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1346                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1347         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1348
1349         return (res < 0) ? res : count;
1350 }
1351
1352 /* procfs -------------------------------------------------------------- */
1353 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1354 {
1355         if (id >= TPACPI_RFK_SW_MAX)
1356                 seq_printf(m, "status:\t\tnot supported\n");
1357         else {
1358                 int status;
1359
1360                 /* This is in the ABI... */
1361                 if (tpacpi_rfk_check_hwblock_state()) {
1362                         status = TPACPI_RFK_RADIO_OFF;
1363                 } else {
1364                         status = tpacpi_rfk_update_swstate(
1365                                                 tpacpi_rfkill_switches[id]);
1366                         if (status < 0)
1367                                 return status;
1368                 }
1369
1370                 seq_printf(m, "status:\t\t%s\n",
1371                                 (status == TPACPI_RFK_RADIO_ON) ?
1372                                         "enabled" : "disabled");
1373                 seq_printf(m, "commands:\tenable, disable\n");
1374         }
1375
1376         return 0;
1377 }
1378
1379 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1380 {
1381         char *cmd;
1382         int status = -1;
1383         int res = 0;
1384
1385         if (id >= TPACPI_RFK_SW_MAX)
1386                 return -ENODEV;
1387
1388         while ((cmd = next_cmd(&buf))) {
1389                 if (strlencmp(cmd, "enable") == 0)
1390                         status = TPACPI_RFK_RADIO_ON;
1391                 else if (strlencmp(cmd, "disable") == 0)
1392                         status = TPACPI_RFK_RADIO_OFF;
1393                 else
1394                         return -EINVAL;
1395         }
1396
1397         if (status != -1) {
1398                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1399                                 (status == TPACPI_RFK_RADIO_ON) ?
1400                                                 "enable" : "disable",
1401                                 tpacpi_rfkill_names[id]);
1402                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1403                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1404         }
1405
1406         return res;
1407 }
1408
1409 /*************************************************************************
1410  * thinkpad-acpi driver attributes
1411  */
1412
1413 /* interface_version --------------------------------------------------- */
1414 static ssize_t tpacpi_driver_interface_version_show(
1415                                 struct device_driver *drv,
1416                                 char *buf)
1417 {
1418         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1419 }
1420
1421 static DRIVER_ATTR(interface_version, S_IRUGO,
1422                 tpacpi_driver_interface_version_show, NULL);
1423
1424 /* debug_level --------------------------------------------------------- */
1425 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1426                                                 char *buf)
1427 {
1428         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1429 }
1430
1431 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1432                                                 const char *buf, size_t count)
1433 {
1434         unsigned long t;
1435
1436         if (parse_strtoul(buf, 0xffff, &t))
1437                 return -EINVAL;
1438
1439         dbg_level = t;
1440
1441         return count;
1442 }
1443
1444 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1445                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1446
1447 /* version ------------------------------------------------------------- */
1448 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1449                                                 char *buf)
1450 {
1451         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1452                         TPACPI_DESC, TPACPI_VERSION);
1453 }
1454
1455 static DRIVER_ATTR(version, S_IRUGO,
1456                 tpacpi_driver_version_show, NULL);
1457
1458 /* --------------------------------------------------------------------- */
1459
1460 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1461
1462 /* wlsw_emulstate ------------------------------------------------------ */
1463 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1464                                                 char *buf)
1465 {
1466         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1467 }
1468
1469 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1470                                                 const char *buf, size_t count)
1471 {
1472         unsigned long t;
1473
1474         if (parse_strtoul(buf, 1, &t))
1475                 return -EINVAL;
1476
1477         if (tpacpi_wlsw_emulstate != !!t) {
1478                 tpacpi_wlsw_emulstate = !!t;
1479                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1480         }
1481
1482         return count;
1483 }
1484
1485 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1486                 tpacpi_driver_wlsw_emulstate_show,
1487                 tpacpi_driver_wlsw_emulstate_store);
1488
1489 /* bluetooth_emulstate ------------------------------------------------- */
1490 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1491                                         struct device_driver *drv,
1492                                         char *buf)
1493 {
1494         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1495 }
1496
1497 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1498                                         struct device_driver *drv,
1499                                         const char *buf, size_t count)
1500 {
1501         unsigned long t;
1502
1503         if (parse_strtoul(buf, 1, &t))
1504                 return -EINVAL;
1505
1506         tpacpi_bluetooth_emulstate = !!t;
1507
1508         return count;
1509 }
1510
1511 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1512                 tpacpi_driver_bluetooth_emulstate_show,
1513                 tpacpi_driver_bluetooth_emulstate_store);
1514
1515 /* wwan_emulstate ------------------------------------------------- */
1516 static ssize_t tpacpi_driver_wwan_emulstate_show(
1517                                         struct device_driver *drv,
1518                                         char *buf)
1519 {
1520         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1521 }
1522
1523 static ssize_t tpacpi_driver_wwan_emulstate_store(
1524                                         struct device_driver *drv,
1525                                         const char *buf, size_t count)
1526 {
1527         unsigned long t;
1528
1529         if (parse_strtoul(buf, 1, &t))
1530                 return -EINVAL;
1531
1532         tpacpi_wwan_emulstate = !!t;
1533
1534         return count;
1535 }
1536
1537 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1538                 tpacpi_driver_wwan_emulstate_show,
1539                 tpacpi_driver_wwan_emulstate_store);
1540
1541 /* uwb_emulstate ------------------------------------------------- */
1542 static ssize_t tpacpi_driver_uwb_emulstate_show(
1543                                         struct device_driver *drv,
1544                                         char *buf)
1545 {
1546         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1547 }
1548
1549 static ssize_t tpacpi_driver_uwb_emulstate_store(
1550                                         struct device_driver *drv,
1551                                         const char *buf, size_t count)
1552 {
1553         unsigned long t;
1554
1555         if (parse_strtoul(buf, 1, &t))
1556                 return -EINVAL;
1557
1558         tpacpi_uwb_emulstate = !!t;
1559
1560         return count;
1561 }
1562
1563 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1564                 tpacpi_driver_uwb_emulstate_show,
1565                 tpacpi_driver_uwb_emulstate_store);
1566 #endif
1567
1568 /* --------------------------------------------------------------------- */
1569
1570 static struct driver_attribute *tpacpi_driver_attributes[] = {
1571         &driver_attr_debug_level, &driver_attr_version,
1572         &driver_attr_interface_version,
1573 };
1574
1575 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1576 {
1577         int i, res;
1578
1579         i = 0;
1580         res = 0;
1581         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1582                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1583                 i++;
1584         }
1585
1586 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1587         if (!res && dbg_wlswemul)
1588                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1589         if (!res && dbg_bluetoothemul)
1590                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1591         if (!res && dbg_wwanemul)
1592                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1593         if (!res && dbg_uwbemul)
1594                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1595 #endif
1596
1597         return res;
1598 }
1599
1600 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1601 {
1602         int i;
1603
1604         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1605                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1606
1607 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1608         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1609         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1610         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1611         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1612 #endif
1613 }
1614
1615 /*************************************************************************
1616  * Firmware Data
1617  */
1618
1619 /*
1620  * Table of recommended minimum BIOS versions
1621  *
1622  * Reasons for listing:
1623  *    1. Stable BIOS, listed because the unknown amount of
1624  *       bugs and bad ACPI behaviour on older versions
1625  *
1626  *    2. BIOS or EC fw with known bugs that trigger on Linux
1627  *
1628  *    3. BIOS with known reduced functionality in older versions
1629  *
1630  *  We recommend the latest BIOS and EC version.
1631  *  We only support the latest BIOS and EC fw version as a rule.
1632  *
1633  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1634  *  Information from users in ThinkWiki
1635  *
1636  *  WARNING: we use this table also to detect that the machine is
1637  *  a ThinkPad in some cases, so don't remove entries lightly.
1638  */
1639
1640 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1641         { .vendor       = (__v),                        \
1642           .bios         = TPID(__id1, __id2),           \
1643           .ec           = TPACPI_MATCH_ANY,             \
1644           .quirks       = TPACPI_MATCH_ANY << 16        \
1645                           | (__bv1) << 8 | (__bv2) }
1646
1647 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1648                 __eid, __ev1, __ev2)                    \
1649         { .vendor       = (__v),                        \
1650           .bios         = TPID(__bid1, __bid2),         \
1651           .ec           = __eid,                        \
1652           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1653                           | (__bv1) << 8 | (__bv2) }
1654
1655 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1656         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1657
1658 /* Outdated IBM BIOSes often lack the EC id string */
1659 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1660         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1661                 __bv1, __bv2, TPID(__id1, __id2),       \
1662                 __ev1, __ev2),                          \
1663         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1664                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1665                 __ev1, __ev2)
1666
1667 /* Outdated IBM BIOSes often lack the EC id string */
1668 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1669                 __eid1, __eid2, __ev1, __ev2)           \
1670         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1671                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1672                 __ev1, __ev2),                          \
1673         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1674                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1675                 __ev1, __ev2)
1676
1677 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1678         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1679
1680 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1681         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1682                 __bv1, __bv2, TPID(__id1, __id2),       \
1683                 __ev1, __ev2)
1684
1685 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1686                 __eid1, __eid2, __ev1, __ev2)           \
1687         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1688                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1689                 __ev1, __ev2)
1690
1691 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1692         /*  Numeric models ------------------ */
1693         /*      FW MODEL   BIOS VERS          */
1694         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1695         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1696         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1697         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1698         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1699         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1700         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1701         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1702         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1703
1704         /* A-series ------------------------- */
1705         /*      FW MODEL   BIOS VERS  EC VERS */
1706         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1707         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1708         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1709         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1710         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1711         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1712         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1713         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1714         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1715         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1716         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1717
1718         /* G-series ------------------------- */
1719         /*      FW MODEL   BIOS VERS          */
1720         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1721         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1722
1723         /* R-series, T-series --------------- */
1724         /*      FW MODEL   BIOS VERS  EC VERS */
1725         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1726         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1727         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1728         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1729         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1730         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1731         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1732                                                     T40/p, T41/p, T42/p (1) */
1733         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1734         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1735         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1736         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1737
1738         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1739         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1740         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1741         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1742         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1743         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1744
1745         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1746         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1747         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1748
1749         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1750         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1751         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1752
1753         /* X-series ------------------------- */
1754         /*      FW MODEL   BIOS VERS  EC VERS */
1755         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1756         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1757         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1758         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1759         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1760         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1761         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1762
1763         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1764         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1765
1766         /* (0) - older versions lack DMI EC fw string and functionality */
1767         /* (1) - older versions known to lack functionality */
1768 };
1769
1770 #undef TPV_QL1
1771 #undef TPV_QL0
1772 #undef TPV_QI2
1773 #undef TPV_QI1
1774 #undef TPV_QI0
1775 #undef TPV_Q_X
1776 #undef TPV_Q
1777
1778 static void __init tpacpi_check_outdated_fw(void)
1779 {
1780         unsigned long fwvers;
1781         u16 ec_version, bios_version;
1782
1783         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1784                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1785
1786         if (!fwvers)
1787                 return;
1788
1789         bios_version = fwvers & 0xffffU;
1790         ec_version = (fwvers >> 16) & 0xffffU;
1791
1792         /* note that unknown versions are set to 0x0000 and we use that */
1793         if ((bios_version > thinkpad_id.bios_release) ||
1794             (ec_version > thinkpad_id.ec_release &&
1795                                 ec_version != TPACPI_MATCH_ANY)) {
1796                 /*
1797                  * The changelogs would let us track down the exact
1798                  * reason, but it is just too much of a pain to track
1799                  * it.  We only list BIOSes that are either really
1800                  * broken, or really stable to begin with, so it is
1801                  * best if the user upgrades the firmware anyway.
1802                  */
1803                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1804                 pr_warn("WARNING: This firmware may be missing critical bug "
1805                         "fixes and/or important features\n");
1806         }
1807 }
1808
1809 static bool __init tpacpi_is_fw_known(void)
1810 {
1811         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1812                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1813 }
1814
1815 /****************************************************************************
1816  ****************************************************************************
1817  *
1818  * Subdrivers
1819  *
1820  ****************************************************************************
1821  ****************************************************************************/
1822
1823 /*************************************************************************
1824  * thinkpad-acpi metadata subdriver
1825  */
1826
1827 static int thinkpad_acpi_driver_read(struct seq_file *m)
1828 {
1829         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1830         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1831         return 0;
1832 }
1833
1834 static struct ibm_struct thinkpad_acpi_driver_data = {
1835         .name = "driver",
1836         .read = thinkpad_acpi_driver_read,
1837 };
1838
1839 /*************************************************************************
1840  * Hotkey subdriver
1841  */
1842
1843 /*
1844  * ThinkPad firmware event model
1845  *
1846  * The ThinkPad firmware has two main event interfaces: normal ACPI
1847  * notifications (which follow the ACPI standard), and a private event
1848  * interface.
1849  *
1850  * The private event interface also issues events for the hotkeys.  As
1851  * the driver gained features, the event handling code ended up being
1852  * built around the hotkey subdriver.  This will need to be refactored
1853  * to a more formal event API eventually.
1854  *
1855  * Some "hotkeys" are actually supposed to be used as event reports,
1856  * such as "brightness has changed", "volume has changed", depending on
1857  * the ThinkPad model and how the firmware is operating.
1858  *
1859  * Unlike other classes, hotkey-class events have mask/unmask control on
1860  * non-ancient firmware.  However, how it behaves changes a lot with the
1861  * firmware model and version.
1862  */
1863
1864 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1865         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1866         TP_ACPI_HOTKEYSCAN_FNF2,
1867         TP_ACPI_HOTKEYSCAN_FNF3,
1868         TP_ACPI_HOTKEYSCAN_FNF4,
1869         TP_ACPI_HOTKEYSCAN_FNF5,
1870         TP_ACPI_HOTKEYSCAN_FNF6,
1871         TP_ACPI_HOTKEYSCAN_FNF7,
1872         TP_ACPI_HOTKEYSCAN_FNF8,
1873         TP_ACPI_HOTKEYSCAN_FNF9,
1874         TP_ACPI_HOTKEYSCAN_FNF10,
1875         TP_ACPI_HOTKEYSCAN_FNF11,
1876         TP_ACPI_HOTKEYSCAN_FNF12,
1877         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1878         TP_ACPI_HOTKEYSCAN_FNINSERT,
1879         TP_ACPI_HOTKEYSCAN_FNDELETE,
1880         TP_ACPI_HOTKEYSCAN_FNHOME,
1881         TP_ACPI_HOTKEYSCAN_FNEND,
1882         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1883         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1884         TP_ACPI_HOTKEYSCAN_FNSPACE,
1885         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1886         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1887         TP_ACPI_HOTKEYSCAN_MUTE,
1888         TP_ACPI_HOTKEYSCAN_THINKPAD,
1889         TP_ACPI_HOTKEYSCAN_UNK1,
1890         TP_ACPI_HOTKEYSCAN_UNK2,
1891         TP_ACPI_HOTKEYSCAN_UNK3,
1892         TP_ACPI_HOTKEYSCAN_UNK4,
1893         TP_ACPI_HOTKEYSCAN_UNK5,
1894         TP_ACPI_HOTKEYSCAN_UNK6,
1895         TP_ACPI_HOTKEYSCAN_UNK7,
1896         TP_ACPI_HOTKEYSCAN_UNK8,
1897
1898         /* Hotkey keymap size */
1899         TPACPI_HOTKEY_MAP_LEN
1900 };
1901
1902 enum {  /* Keys/events available through NVRAM polling */
1903         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1904         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1905 };
1906
1907 enum {  /* Positions of some of the keys in hotkey masks */
1908         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1909         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1910         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1911         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1912         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1913         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1914         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1915         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1916         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1917         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1918         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1919 };
1920
1921 enum {  /* NVRAM to ACPI HKEY group map */
1922         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1923                                           TP_ACPI_HKEY_ZOOM_MASK |
1924                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1925                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1926         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1927                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1928         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1929                                           TP_ACPI_HKEY_VOLDWN_MASK |
1930                                           TP_ACPI_HKEY_MUTE_MASK,
1931 };
1932
1933 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1934 struct tp_nvram_state {
1935        u16 thinkpad_toggle:1;
1936        u16 zoom_toggle:1;
1937        u16 display_toggle:1;
1938        u16 thinklight_toggle:1;
1939        u16 hibernate_toggle:1;
1940        u16 displayexp_toggle:1;
1941        u16 display_state:1;
1942        u16 brightness_toggle:1;
1943        u16 volume_toggle:1;
1944        u16 mute:1;
1945
1946        u8 brightness_level;
1947        u8 volume_level;
1948 };
1949
1950 /* kthread for the hotkey poller */
1951 static struct task_struct *tpacpi_hotkey_task;
1952
1953 /* Acquired while the poller kthread is running, use to sync start/stop */
1954 static struct mutex hotkey_thread_mutex;
1955
1956 /*
1957  * Acquire mutex to write poller control variables as an
1958  * atomic block.
1959  *
1960  * Increment hotkey_config_change when changing them if you
1961  * want the kthread to forget old state.
1962  *
1963  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1964  */
1965 static struct mutex hotkey_thread_data_mutex;
1966 static unsigned int hotkey_config_change;
1967
1968 /*
1969  * hotkey poller control variables
1970  *
1971  * Must be atomic or readers will also need to acquire mutex
1972  *
1973  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1974  * should be used only when the changes need to be taken as
1975  * a block, OR when one needs to force the kthread to forget
1976  * old state.
1977  */
1978 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1979 static unsigned int hotkey_poll_freq = 10; /* Hz */
1980
1981 #define HOTKEY_CONFIG_CRITICAL_START \
1982         do { \
1983                 mutex_lock(&hotkey_thread_data_mutex); \
1984                 hotkey_config_change++; \
1985         } while (0);
1986 #define HOTKEY_CONFIG_CRITICAL_END \
1987         mutex_unlock(&hotkey_thread_data_mutex);
1988
1989 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1990
1991 #define hotkey_source_mask 0U
1992 #define HOTKEY_CONFIG_CRITICAL_START
1993 #define HOTKEY_CONFIG_CRITICAL_END
1994
1995 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1996
1997 static struct mutex hotkey_mutex;
1998
1999 static enum {   /* Reasons for waking up */
2000         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2001         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2002         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2003 } hotkey_wakeup_reason;
2004
2005 static int hotkey_autosleep_ack;
2006
2007 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2008 static u32 hotkey_all_mask;             /* all events supported in fw */
2009 static u32 hotkey_reserved_mask;        /* events better left disabled */
2010 static u32 hotkey_driver_mask;          /* events needed by the driver */
2011 static u32 hotkey_user_mask;            /* events visible to userspace */
2012 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2013
2014 static unsigned int hotkey_report_mode;
2015
2016 static u16 *hotkey_keycode_map;
2017
2018 static struct attribute_set *hotkey_dev_attributes;
2019
2020 static void tpacpi_driver_event(const unsigned int hkey_event);
2021 static void hotkey_driver_event(const unsigned int scancode);
2022 static void hotkey_poll_setup(const bool may_warn);
2023
2024 /* HKEY.MHKG() return bits */
2025 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2026
2027 static int hotkey_get_wlsw(void)
2028 {
2029         int status;
2030
2031         if (!tp_features.hotkey_wlsw)
2032                 return -ENODEV;
2033
2034 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2035         if (dbg_wlswemul)
2036                 return (tpacpi_wlsw_emulstate) ?
2037                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2038 #endif
2039
2040         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2041                 return -EIO;
2042
2043         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2044 }
2045
2046 static int hotkey_get_tablet_mode(int *status)
2047 {
2048         int s;
2049
2050         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2051                 return -EIO;
2052
2053         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2054         return 0;
2055 }
2056
2057 /*
2058  * Reads current event mask from firmware, and updates
2059  * hotkey_acpi_mask accordingly.  Also resets any bits
2060  * from hotkey_user_mask that are unavailable to be
2061  * delivered (shadow requirement of the userspace ABI).
2062  *
2063  * Call with hotkey_mutex held
2064  */
2065 static int hotkey_mask_get(void)
2066 {
2067         if (tp_features.hotkey_mask) {
2068                 u32 m = 0;
2069
2070                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2071                         return -EIO;
2072
2073                 hotkey_acpi_mask = m;
2074         } else {
2075                 /* no mask support doesn't mean no event support... */
2076                 hotkey_acpi_mask = hotkey_all_mask;
2077         }
2078
2079         /* sync userspace-visible mask */
2080         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2081
2082         return 0;
2083 }
2084
2085 void static hotkey_mask_warn_incomplete_mask(void)
2086 {
2087         /* log only what the user can fix... */
2088         const u32 wantedmask = hotkey_driver_mask &
2089                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2090                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2091
2092         if (wantedmask)
2093                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2094 }
2095
2096 /*
2097  * Set the firmware mask when supported
2098  *
2099  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2100  *
2101  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2102  *
2103  * Call with hotkey_mutex held
2104  */
2105 static int hotkey_mask_set(u32 mask)
2106 {
2107         int i;
2108         int rc = 0;
2109
2110         const u32 fwmask = mask & ~hotkey_source_mask;
2111
2112         if (tp_features.hotkey_mask) {
2113                 for (i = 0; i < 32; i++) {
2114                         if (!acpi_evalf(hkey_handle,
2115                                         NULL, "MHKM", "vdd", i + 1,
2116                                         !!(mask & (1 << i)))) {
2117                                 rc = -EIO;
2118                                 break;
2119                         }
2120                 }
2121         }
2122
2123         /*
2124          * We *must* make an inconditional call to hotkey_mask_get to
2125          * refresh hotkey_acpi_mask and update hotkey_user_mask
2126          *
2127          * Take the opportunity to also log when we cannot _enable_
2128          * a given event.
2129          */
2130         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2131                 pr_notice("asked for hotkey mask 0x%08x, but "
2132                           "firmware forced it to 0x%08x\n",
2133                           fwmask, hotkey_acpi_mask);
2134         }
2135
2136         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2137                 hotkey_mask_warn_incomplete_mask();
2138
2139         return rc;
2140 }
2141
2142 /*
2143  * Sets hotkey_user_mask and tries to set the firmware mask
2144  *
2145  * Call with hotkey_mutex held
2146  */
2147 static int hotkey_user_mask_set(const u32 mask)
2148 {
2149         int rc;
2150
2151         /* Give people a chance to notice they are doing something that
2152          * is bound to go boom on their users sooner or later */
2153         if (!tp_warned.hotkey_mask_ff &&
2154             (mask == 0xffff || mask == 0xffffff ||
2155              mask == 0xffffffff)) {
2156                 tp_warned.hotkey_mask_ff = 1;
2157                 pr_notice("setting the hotkey mask to 0x%08x is likely "
2158                           "not the best way to go about it\n", mask);
2159                 pr_notice("please consider using the driver defaults, "
2160                           "and refer to up-to-date thinkpad-acpi "
2161                           "documentation\n");
2162         }
2163
2164         /* Try to enable what the user asked for, plus whatever we need.
2165          * this syncs everything but won't enable bits in hotkey_user_mask */
2166         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2167
2168         /* Enable the available bits in hotkey_user_mask */
2169         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2170
2171         return rc;
2172 }
2173
2174 /*
2175  * Sets the driver hotkey mask.
2176  *
2177  * Can be called even if the hotkey subdriver is inactive
2178  */
2179 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2180 {
2181         int rc;
2182
2183         /* Do the right thing if hotkey_init has not been called yet */
2184         if (!tp_features.hotkey) {
2185                 hotkey_driver_mask = mask;
2186                 return 0;
2187         }
2188
2189         mutex_lock(&hotkey_mutex);
2190
2191         HOTKEY_CONFIG_CRITICAL_START
2192         hotkey_driver_mask = mask;
2193 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2194         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2195 #endif
2196         HOTKEY_CONFIG_CRITICAL_END
2197
2198         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2199                                                         ~hotkey_source_mask);
2200         hotkey_poll_setup(true);
2201
2202         mutex_unlock(&hotkey_mutex);
2203
2204         return rc;
2205 }
2206
2207 static int hotkey_status_get(int *status)
2208 {
2209         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2210                 return -EIO;
2211
2212         return 0;
2213 }
2214
2215 static int hotkey_status_set(bool enable)
2216 {
2217         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2218                 return -EIO;
2219
2220         return 0;
2221 }
2222
2223 static void tpacpi_input_send_tabletsw(void)
2224 {
2225         int state;
2226
2227         if (tp_features.hotkey_tablet &&
2228             !hotkey_get_tablet_mode(&state)) {
2229                 mutex_lock(&tpacpi_inputdev_send_mutex);
2230
2231                 input_report_switch(tpacpi_inputdev,
2232                                     SW_TABLET_MODE, !!state);
2233                 input_sync(tpacpi_inputdev);
2234
2235                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2236         }
2237 }
2238
2239 /* Do NOT call without validating scancode first */
2240 static void tpacpi_input_send_key(const unsigned int scancode)
2241 {
2242         const unsigned int keycode = hotkey_keycode_map[scancode];
2243
2244         if (keycode != KEY_RESERVED) {
2245                 mutex_lock(&tpacpi_inputdev_send_mutex);
2246
2247                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2248                 input_report_key(tpacpi_inputdev, keycode, 1);
2249                 input_sync(tpacpi_inputdev);
2250
2251                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2252                 input_report_key(tpacpi_inputdev, keycode, 0);
2253                 input_sync(tpacpi_inputdev);
2254
2255                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2256         }
2257 }
2258
2259 /* Do NOT call without validating scancode first */
2260 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2261 {
2262         hotkey_driver_event(scancode);
2263         if (hotkey_user_mask & (1 << scancode))
2264                 tpacpi_input_send_key(scancode);
2265 }
2266
2267 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2268 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2269
2270 /* Do NOT call without validating scancode first */
2271 static void tpacpi_hotkey_send_key(unsigned int scancode)
2272 {
2273         tpacpi_input_send_key_masked(scancode);
2274         if (hotkey_report_mode < 2) {
2275                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2276                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2277         }
2278 }
2279
2280 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2281 {
2282         u8 d;
2283
2284         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2285                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2286                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2287                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2288                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2289                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2290         }
2291         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2292                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2293                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2294         }
2295         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2296                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2297                 n->displayexp_toggle =
2298                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2299         }
2300         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2301                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2302                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2303                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2304                 n->brightness_toggle =
2305                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2306         }
2307         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2308                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2309                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2310                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2311                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2312                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2313         }
2314 }
2315
2316 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2317                                            struct tp_nvram_state *newn,
2318                                            const u32 event_mask)
2319 {
2320
2321 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2322         do { \
2323                 if ((event_mask & (1 << __scancode)) && \
2324                     oldn->__member != newn->__member) \
2325                         tpacpi_hotkey_send_key(__scancode); \
2326         } while (0)
2327
2328 #define TPACPI_MAY_SEND_KEY(__scancode) \
2329         do { \
2330                 if (event_mask & (1 << __scancode)) \
2331                         tpacpi_hotkey_send_key(__scancode); \
2332         } while (0)
2333
2334         void issue_volchange(const unsigned int oldvol,
2335                              const unsigned int newvol)
2336         {
2337                 unsigned int i = oldvol;
2338
2339                 while (i > newvol) {
2340                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2341                         i--;
2342                 }
2343                 while (i < newvol) {
2344                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2345                         i++;
2346                 }
2347         }
2348
2349         void issue_brightnesschange(const unsigned int oldbrt,
2350                                     const unsigned int newbrt)
2351         {
2352                 unsigned int i = oldbrt;
2353
2354                 while (i > newbrt) {
2355                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2356                         i--;
2357                 }
2358                 while (i < newbrt) {
2359                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2360                         i++;
2361                 }
2362         }
2363
2364         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2365         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2366         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2367         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2368
2369         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2370
2371         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2372
2373         /*
2374          * Handle volume
2375          *
2376          * This code is supposed to duplicate the IBM firmware behaviour:
2377          * - Pressing MUTE issues mute hotkey message, even when already mute
2378          * - Pressing Volume up/down issues volume up/down hotkey messages,
2379          *   even when already at maximum or minimum volume
2380          * - The act of unmuting issues volume up/down notification,
2381          *   depending which key was used to unmute
2382          *
2383          * We are constrained to what the NVRAM can tell us, which is not much
2384          * and certainly not enough if more than one volume hotkey was pressed
2385          * since the last poll cycle.
2386          *
2387          * Just to make our life interesting, some newer Lenovo ThinkPads have
2388          * bugs in the BIOS and may fail to update volume_toggle properly.
2389          */
2390         if (newn->mute) {
2391                 /* muted */
2392                 if (!oldn->mute ||
2393                     oldn->volume_toggle != newn->volume_toggle ||
2394                     oldn->volume_level != newn->volume_level) {
2395                         /* recently muted, or repeated mute keypress, or
2396                          * multiple presses ending in mute */
2397                         issue_volchange(oldn->volume_level, newn->volume_level);
2398                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2399                 }
2400         } else {
2401                 /* unmute */
2402                 if (oldn->mute) {
2403                         /* recently unmuted, issue 'unmute' keypress */
2404                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2405                 }
2406                 if (oldn->volume_level != newn->volume_level) {
2407                         issue_volchange(oldn->volume_level, newn->volume_level);
2408                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2409                         /* repeated vol up/down keypress at end of scale ? */
2410                         if (newn->volume_level == 0)
2411                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2412                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2413                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2414                 }
2415         }
2416
2417         /* handle brightness */
2418         if (oldn->brightness_level != newn->brightness_level) {
2419                 issue_brightnesschange(oldn->brightness_level,
2420                                        newn->brightness_level);
2421         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2422                 /* repeated key presses that didn't change state */
2423                 if (newn->brightness_level == 0)
2424                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2425                 else if (newn->brightness_level >= bright_maxlvl
2426                                 && !tp_features.bright_unkfw)
2427                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2428         }
2429
2430 #undef TPACPI_COMPARE_KEY
2431 #undef TPACPI_MAY_SEND_KEY
2432 }
2433
2434 /*
2435  * Polling driver
2436  *
2437  * We track all events in hotkey_source_mask all the time, since
2438  * most of them are edge-based.  We only issue those requested by
2439  * hotkey_user_mask or hotkey_driver_mask, though.
2440  */
2441 static int hotkey_kthread(void *data)
2442 {
2443         struct tp_nvram_state s[2];
2444         u32 poll_mask, event_mask;
2445         unsigned int si, so;
2446         unsigned long t;
2447         unsigned int change_detector, must_reset;
2448         unsigned int poll_freq;
2449
2450         mutex_lock(&hotkey_thread_mutex);
2451
2452         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2453                 goto exit;
2454
2455         set_freezable();
2456
2457         so = 0;
2458         si = 1;
2459         t = 0;
2460
2461         /* Initial state for compares */
2462         mutex_lock(&hotkey_thread_data_mutex);
2463         change_detector = hotkey_config_change;
2464         poll_mask = hotkey_source_mask;
2465         event_mask = hotkey_source_mask &
2466                         (hotkey_driver_mask | hotkey_user_mask);
2467         poll_freq = hotkey_poll_freq;
2468         mutex_unlock(&hotkey_thread_data_mutex);
2469         hotkey_read_nvram(&s[so], poll_mask);
2470
2471         while (!kthread_should_stop()) {
2472                 if (t == 0) {
2473                         if (likely(poll_freq))
2474                                 t = 1000/poll_freq;
2475                         else
2476                                 t = 100;        /* should never happen... */
2477                 }
2478                 t = msleep_interruptible(t);
2479                 if (unlikely(kthread_should_stop()))
2480                         break;
2481                 must_reset = try_to_freeze();
2482                 if (t > 0 && !must_reset)
2483                         continue;
2484
2485                 mutex_lock(&hotkey_thread_data_mutex);
2486                 if (must_reset || hotkey_config_change != change_detector) {
2487                         /* forget old state on thaw or config change */
2488                         si = so;
2489                         t = 0;
2490                         change_detector = hotkey_config_change;
2491                 }
2492                 poll_mask = hotkey_source_mask;
2493                 event_mask = hotkey_source_mask &
2494                                 (hotkey_driver_mask | hotkey_user_mask);
2495                 poll_freq = hotkey_poll_freq;
2496                 mutex_unlock(&hotkey_thread_data_mutex);
2497
2498                 if (likely(poll_mask)) {
2499                         hotkey_read_nvram(&s[si], poll_mask);
2500                         if (likely(si != so)) {
2501                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2502                                                                 event_mask);
2503                         }
2504                 }
2505
2506                 so = si;
2507                 si ^= 1;
2508         }
2509
2510 exit:
2511         mutex_unlock(&hotkey_thread_mutex);
2512         return 0;
2513 }
2514
2515 /* call with hotkey_mutex held */
2516 static void hotkey_poll_stop_sync(void)
2517 {
2518         if (tpacpi_hotkey_task) {
2519                 if (frozen(tpacpi_hotkey_task) ||
2520                     freezing(tpacpi_hotkey_task))
2521                         thaw_process(tpacpi_hotkey_task);
2522
2523                 kthread_stop(tpacpi_hotkey_task);
2524                 tpacpi_hotkey_task = NULL;
2525                 mutex_lock(&hotkey_thread_mutex);
2526                 /* at this point, the thread did exit */
2527                 mutex_unlock(&hotkey_thread_mutex);
2528         }
2529 }
2530
2531 /* call with hotkey_mutex held */
2532 static void hotkey_poll_setup(const bool may_warn)
2533 {
2534         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2535         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2536
2537         if (hotkey_poll_freq > 0 &&
2538             (poll_driver_mask ||
2539              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2540                 if (!tpacpi_hotkey_task) {
2541                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2542                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2543                         if (IS_ERR(tpacpi_hotkey_task)) {
2544                                 tpacpi_hotkey_task = NULL;
2545                                 pr_err("could not create kernel thread "
2546                                        "for hotkey polling\n");
2547                         }
2548                 }
2549         } else {
2550                 hotkey_poll_stop_sync();
2551                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2552                     hotkey_poll_freq == 0) {
2553                         pr_notice("hot keys 0x%08x and/or events 0x%08x "
2554                                   "require polling, which is currently "
2555                                   "disabled\n",
2556                                   poll_user_mask, poll_driver_mask);
2557                 }
2558         }
2559 }
2560
2561 static void hotkey_poll_setup_safe(const bool may_warn)
2562 {
2563         mutex_lock(&hotkey_mutex);
2564         hotkey_poll_setup(may_warn);
2565         mutex_unlock(&hotkey_mutex);
2566 }
2567
2568 /* call with hotkey_mutex held */
2569 static void hotkey_poll_set_freq(unsigned int freq)
2570 {
2571         if (!freq)
2572                 hotkey_poll_stop_sync();
2573
2574         hotkey_poll_freq = freq;
2575 }
2576
2577 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2578
2579 static void hotkey_poll_setup(const bool __unused)
2580 {
2581 }
2582
2583 static void hotkey_poll_setup_safe(const bool __unused)
2584 {
2585 }
2586
2587 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2588
2589 static int hotkey_inputdev_open(struct input_dev *dev)
2590 {
2591         switch (tpacpi_lifecycle) {
2592         case TPACPI_LIFE_INIT:
2593         case TPACPI_LIFE_RUNNING:
2594                 hotkey_poll_setup_safe(false);
2595                 return 0;
2596         case TPACPI_LIFE_EXITING:
2597                 return -EBUSY;
2598         }
2599
2600         /* Should only happen if tpacpi_lifecycle is corrupt */
2601         BUG();
2602         return -EBUSY;
2603 }
2604
2605 static void hotkey_inputdev_close(struct input_dev *dev)
2606 {
2607         /* disable hotkey polling when possible */
2608         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2609             !(hotkey_source_mask & hotkey_driver_mask))
2610                 hotkey_poll_setup_safe(false);
2611 }
2612
2613 /* sysfs hotkey enable ------------------------------------------------- */
2614 static ssize_t hotkey_enable_show(struct device *dev,
2615                            struct device_attribute *attr,
2616                            char *buf)
2617 {
2618         int res, status;
2619
2620         printk_deprecated_attribute("hotkey_enable",
2621                         "Hotkey reporting is always enabled");
2622
2623         res = hotkey_status_get(&status);
2624         if (res)
2625                 return res;
2626
2627         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2628 }
2629
2630 static ssize_t hotkey_enable_store(struct device *dev,
2631                             struct device_attribute *attr,
2632                             const char *buf, size_t count)
2633 {
2634         unsigned long t;
2635
2636         printk_deprecated_attribute("hotkey_enable",
2637                         "Hotkeys can be disabled through hotkey_mask");
2638
2639         if (parse_strtoul(buf, 1, &t))
2640                 return -EINVAL;
2641
2642         if (t == 0)
2643                 return -EPERM;
2644
2645         return count;
2646 }
2647
2648 static struct device_attribute dev_attr_hotkey_enable =
2649         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2650                 hotkey_enable_show, hotkey_enable_store);
2651
2652 /* sysfs hotkey mask --------------------------------------------------- */
2653 static ssize_t hotkey_mask_show(struct device *dev,
2654                            struct device_attribute *attr,
2655                            char *buf)
2656 {
2657         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2658 }
2659
2660 static ssize_t hotkey_mask_store(struct device *dev,
2661                             struct device_attribute *attr,
2662                             const char *buf, size_t count)
2663 {
2664         unsigned long t;
2665         int res;
2666
2667         if (parse_strtoul(buf, 0xffffffffUL, &t))
2668                 return -EINVAL;
2669
2670         if (mutex_lock_killable(&hotkey_mutex))
2671                 return -ERESTARTSYS;
2672
2673         res = hotkey_user_mask_set(t);
2674
2675 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2676         hotkey_poll_setup(true);
2677 #endif
2678
2679         mutex_unlock(&hotkey_mutex);
2680
2681         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2682
2683         return (res) ? res : count;
2684 }
2685
2686 static struct device_attribute dev_attr_hotkey_mask =
2687         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2688                 hotkey_mask_show, hotkey_mask_store);
2689
2690 /* sysfs hotkey bios_enabled ------------------------------------------- */
2691 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2692                            struct device_attribute *attr,
2693                            char *buf)
2694 {
2695         return sprintf(buf, "0\n");
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_bios_enabled =
2699         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2700
2701 /* sysfs hotkey bios_mask ---------------------------------------------- */
2702 static ssize_t hotkey_bios_mask_show(struct device *dev,
2703                            struct device_attribute *attr,
2704                            char *buf)
2705 {
2706         printk_deprecated_attribute("hotkey_bios_mask",
2707                         "This attribute is useless.");
2708         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2709 }
2710
2711 static struct device_attribute dev_attr_hotkey_bios_mask =
2712         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2713
2714 /* sysfs hotkey all_mask ----------------------------------------------- */
2715 static ssize_t hotkey_all_mask_show(struct device *dev,
2716                            struct device_attribute *attr,
2717                            char *buf)
2718 {
2719         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2720                                 hotkey_all_mask | hotkey_source_mask);
2721 }
2722
2723 static struct device_attribute dev_attr_hotkey_all_mask =
2724         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2725
2726 /* sysfs hotkey recommended_mask --------------------------------------- */
2727 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2728                                             struct device_attribute *attr,
2729                                             char *buf)
2730 {
2731         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2732                         (hotkey_all_mask | hotkey_source_mask)
2733                         & ~hotkey_reserved_mask);
2734 }
2735
2736 static struct device_attribute dev_attr_hotkey_recommended_mask =
2737         __ATTR(hotkey_recommended_mask, S_IRUGO,
2738                 hotkey_recommended_mask_show, NULL);
2739
2740 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2741
2742 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2743 static ssize_t hotkey_source_mask_show(struct device *dev,
2744                            struct device_attribute *attr,
2745                            char *buf)
2746 {
2747         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2748 }
2749
2750 static ssize_t hotkey_source_mask_store(struct device *dev,
2751                             struct device_attribute *attr,
2752                             const char *buf, size_t count)
2753 {
2754         unsigned long t;
2755         u32 r_ev;
2756         int rc;
2757
2758         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2759                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2760                 return -EINVAL;
2761
2762         if (mutex_lock_killable(&hotkey_mutex))
2763                 return -ERESTARTSYS;
2764
2765         HOTKEY_CONFIG_CRITICAL_START
2766         hotkey_source_mask = t;
2767         HOTKEY_CONFIG_CRITICAL_END
2768
2769         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2770                         ~hotkey_source_mask);
2771         hotkey_poll_setup(true);
2772
2773         /* check if events needed by the driver got disabled */
2774         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2775                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2776
2777         mutex_unlock(&hotkey_mutex);
2778
2779         if (rc < 0)
2780                 pr_err("hotkey_source_mask: "
2781                        "failed to update the firmware event mask!\n");
2782
2783         if (r_ev)
2784                 pr_notice("hotkey_source_mask: "
2785                           "some important events were disabled: 0x%04x\n",
2786                           r_ev);
2787
2788         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2789
2790         return (rc < 0) ? rc : count;
2791 }
2792
2793 static struct device_attribute dev_attr_hotkey_source_mask =
2794         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2795                 hotkey_source_mask_show, hotkey_source_mask_store);
2796
2797 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2798 static ssize_t hotkey_poll_freq_show(struct device *dev,
2799                            struct device_attribute *attr,
2800                            char *buf)
2801 {
2802         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2803 }
2804
2805 static ssize_t hotkey_poll_freq_store(struct device *dev,
2806                             struct device_attribute *attr,
2807                             const char *buf, size_t count)
2808 {
2809         unsigned long t;
2810
2811         if (parse_strtoul(buf, 25, &t))
2812                 return -EINVAL;
2813
2814         if (mutex_lock_killable(&hotkey_mutex))
2815                 return -ERESTARTSYS;
2816
2817         hotkey_poll_set_freq(t);
2818         hotkey_poll_setup(true);
2819
2820         mutex_unlock(&hotkey_mutex);
2821
2822         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2823
2824         return count;
2825 }
2826
2827 static struct device_attribute dev_attr_hotkey_poll_freq =
2828         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2829                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2830
2831 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2832
2833 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2834 static ssize_t hotkey_radio_sw_show(struct device *dev,
2835                            struct device_attribute *attr,
2836                            char *buf)
2837 {
2838         int res;
2839         res = hotkey_get_wlsw();
2840         if (res < 0)
2841                 return res;
2842
2843         /* Opportunistic update */
2844         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2845
2846         return snprintf(buf, PAGE_SIZE, "%d\n",
2847                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2848 }
2849
2850 static struct device_attribute dev_attr_hotkey_radio_sw =
2851         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2852
2853 static void hotkey_radio_sw_notify_change(void)
2854 {
2855         if (tp_features.hotkey_wlsw)
2856                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2857                              "hotkey_radio_sw");
2858 }
2859
2860 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2861 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2862                            struct device_attribute *attr,
2863                            char *buf)
2864 {
2865         int res, s;
2866         res = hotkey_get_tablet_mode(&s);
2867         if (res < 0)
2868                 return res;
2869
2870         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2871 }
2872
2873 static struct device_attribute dev_attr_hotkey_tablet_mode =
2874         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2875
2876 static void hotkey_tablet_mode_notify_change(void)
2877 {
2878         if (tp_features.hotkey_tablet)
2879                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2880                              "hotkey_tablet_mode");
2881 }
2882
2883 /* sysfs hotkey report_mode -------------------------------------------- */
2884 static ssize_t hotkey_report_mode_show(struct device *dev,
2885                            struct device_attribute *attr,
2886                            char *buf)
2887 {
2888         return snprintf(buf, PAGE_SIZE, "%d\n",
2889                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2890 }
2891
2892 static struct device_attribute dev_attr_hotkey_report_mode =
2893         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2894
2895 /* sysfs wakeup reason (pollable) -------------------------------------- */
2896 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2897                            struct device_attribute *attr,
2898                            char *buf)
2899 {
2900         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2901 }
2902
2903 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2904         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2905
2906 static void hotkey_wakeup_reason_notify_change(void)
2907 {
2908         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2909                      "wakeup_reason");
2910 }
2911
2912 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2913 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2914                            struct device_attribute *attr,
2915                            char *buf)
2916 {
2917         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2918 }
2919
2920 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2921         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2922                hotkey_wakeup_hotunplug_complete_show, NULL);
2923
2924 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2925 {
2926         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2927                      "wakeup_hotunplug_complete");
2928 }
2929
2930 /* --------------------------------------------------------------------- */
2931
2932 static struct attribute *hotkey_attributes[] __initdata = {
2933         &dev_attr_hotkey_enable.attr,
2934         &dev_attr_hotkey_bios_enabled.attr,
2935         &dev_attr_hotkey_bios_mask.attr,
2936         &dev_attr_hotkey_report_mode.attr,
2937         &dev_attr_hotkey_wakeup_reason.attr,
2938         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2939         &dev_attr_hotkey_mask.attr,
2940         &dev_attr_hotkey_all_mask.attr,
2941         &dev_attr_hotkey_recommended_mask.attr,
2942 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2943         &dev_attr_hotkey_source_mask.attr,
2944         &dev_attr_hotkey_poll_freq.attr,
2945 #endif
2946 };
2947
2948 /*
2949  * Sync both the hw and sw blocking state of all switches
2950  */
2951 static void tpacpi_send_radiosw_update(void)
2952 {
2953         int wlsw;
2954
2955         /*
2956          * We must sync all rfkill controllers *before* issuing any
2957          * rfkill input events, or we will race the rfkill core input
2958          * handler.
2959          *
2960          * tpacpi_inputdev_send_mutex works as a synchronization point
2961          * for the above.
2962          *
2963          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2964          */
2965
2966         wlsw = hotkey_get_wlsw();
2967
2968         /* Sync hw blocking state first if it is hw-blocked */
2969         if (wlsw == TPACPI_RFK_RADIO_OFF)
2970                 tpacpi_rfk_update_hwblock_state(true);
2971
2972         /* Sync sw blocking state */
2973         tpacpi_rfk_update_swstate_all();
2974
2975         /* Sync hw blocking state last if it is hw-unblocked */
2976         if (wlsw == TPACPI_RFK_RADIO_ON)
2977                 tpacpi_rfk_update_hwblock_state(false);
2978
2979         /* Issue rfkill input event for WLSW switch */
2980         if (!(wlsw < 0)) {
2981                 mutex_lock(&tpacpi_inputdev_send_mutex);
2982
2983                 input_report_switch(tpacpi_inputdev,
2984                                     SW_RFKILL_ALL, (wlsw > 0));
2985                 input_sync(tpacpi_inputdev);
2986
2987                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2988         }
2989
2990         /*
2991          * this can be unconditional, as we will poll state again
2992          * if userspace uses the notify to read data
2993          */
2994         hotkey_radio_sw_notify_change();
2995 }
2996
2997 static void hotkey_exit(void)
2998 {
2999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3000         mutex_lock(&hotkey_mutex);
3001         hotkey_poll_stop_sync();
3002         mutex_unlock(&hotkey_mutex);
3003 #endif
3004
3005         if (hotkey_dev_attributes)
3006                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3007
3008         kfree(hotkey_keycode_map);
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, KEY_UNKNOWN, KEY_UNKNOWN,
3178                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3179                 },
3180         };
3181
3182         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3183                 /* Generic maps (fallback) */
3184                 {
3185                   .vendor = PCI_VENDOR_ID_IBM,
3186                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3187                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3188                 },
3189                 {
3190                   .vendor = PCI_VENDOR_ID_LENOVO,
3191                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3192                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3193                 },
3194         };
3195
3196 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3197 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3198
3199         int res, i;
3200         int status;
3201         int hkeyv;
3202         bool radiosw_state  = false;
3203         bool tabletsw_state = false;
3204
3205         unsigned long quirks;
3206         unsigned long keymap_id;
3207
3208         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3209                         "initializing hotkey subdriver\n");
3210
3211         BUG_ON(!tpacpi_inputdev);
3212         BUG_ON(tpacpi_inputdev->open != NULL ||
3213                tpacpi_inputdev->close != NULL);
3214
3215         TPACPI_ACPIHANDLE_INIT(hkey);
3216         mutex_init(&hotkey_mutex);
3217
3218 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3219         mutex_init(&hotkey_thread_mutex);
3220         mutex_init(&hotkey_thread_data_mutex);
3221 #endif
3222
3223         /* hotkey not supported on 570 */
3224         tp_features.hotkey = hkey_handle != NULL;
3225
3226         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3227                 "hotkeys are %s\n",
3228                 str_supported(tp_features.hotkey));
3229
3230         if (!tp_features.hotkey)
3231                 return 1;
3232
3233         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3234                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3235
3236         tpacpi_disable_brightness_delay();
3237
3238         /* MUST have enough space for all attributes to be added to
3239          * hotkey_dev_attributes */
3240         hotkey_dev_attributes = create_attr_set(
3241                                         ARRAY_SIZE(hotkey_attributes) + 2,
3242                                         NULL);
3243         if (!hotkey_dev_attributes)
3244                 return -ENOMEM;
3245         res = add_many_to_attr_set(hotkey_dev_attributes,
3246                         hotkey_attributes,
3247                         ARRAY_SIZE(hotkey_attributes));
3248         if (res)
3249                 goto err_exit;
3250
3251         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3252            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3253            for HKEY interface version 0x100 */
3254         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3255                 if ((hkeyv >> 8) != 1) {
3256                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3257                                hkeyv);
3258                         pr_err("please report this to %s\n", TPACPI_MAIL);
3259                 } else {
3260                         /*
3261                          * MHKV 0x100 in A31, R40, R40e,
3262                          * T4x, X31, and later
3263                          */
3264                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3265                                 "firmware HKEY interface version: 0x%x\n",
3266                                 hkeyv);
3267
3268                         /* Paranoia check AND init hotkey_all_mask */
3269                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3270                                         "MHKA", "qd")) {
3271                                 pr_err("missing MHKA handler, "
3272                                        "please report this to %s\n",
3273                                        TPACPI_MAIL);
3274                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3275                                 hotkey_all_mask = 0x080cU;
3276                         } else {
3277                                 tp_features.hotkey_mask = 1;
3278                         }
3279                 }
3280         }
3281
3282         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3283                 "hotkey masks are %s\n",
3284                 str_supported(tp_features.hotkey_mask));
3285
3286         /* Init hotkey_all_mask if not initialized yet */
3287         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3288             (quirks & TPACPI_HK_Q_INIMASK))
3289                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3290
3291         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3292         if (tp_features.hotkey_mask) {
3293                 /* hotkey_source_mask *must* be zero for
3294                  * the first hotkey_mask_get to return hotkey_orig_mask */
3295                 res = hotkey_mask_get();
3296                 if (res)
3297                         goto err_exit;
3298
3299                 hotkey_orig_mask = hotkey_acpi_mask;
3300         } else {
3301                 hotkey_orig_mask = hotkey_all_mask;
3302                 hotkey_acpi_mask = hotkey_all_mask;
3303         }
3304
3305 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3306         if (dbg_wlswemul) {
3307                 tp_features.hotkey_wlsw = 1;
3308                 radiosw_state = !!tpacpi_wlsw_emulstate;
3309                 pr_info("radio switch emulation enabled\n");
3310         } else
3311 #endif
3312         /* Not all thinkpads have a hardware radio switch */
3313         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3314                 tp_features.hotkey_wlsw = 1;
3315                 radiosw_state = !!status;
3316                 pr_info("radio switch found; radios are %s\n",
3317                         enabled(status, 0));
3318         }
3319         if (tp_features.hotkey_wlsw)
3320                 res = add_to_attr_set(hotkey_dev_attributes,
3321                                 &dev_attr_hotkey_radio_sw.attr);
3322
3323         /* For X41t, X60t, X61t Tablets... */
3324         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3325                 tp_features.hotkey_tablet = 1;
3326                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3327                 pr_info("possible tablet mode switch found; "
3328                         "ThinkPad in %s mode\n",
3329                         (tabletsw_state) ? "tablet" : "laptop");
3330                 res = add_to_attr_set(hotkey_dev_attributes,
3331                                 &dev_attr_hotkey_tablet_mode.attr);
3332         }
3333
3334         if (!res)
3335                 res = register_attr_set_with_sysfs(
3336                                 hotkey_dev_attributes,
3337                                 &tpacpi_pdev->dev.kobj);
3338         if (res)
3339                 goto err_exit;
3340
3341         /* Set up key map */
3342         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3343                                         GFP_KERNEL);
3344         if (!hotkey_keycode_map) {
3345                 pr_err("failed to allocate memory for key map\n");
3346                 res = -ENOMEM;
3347                 goto err_exit;
3348         }
3349
3350         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3351                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3352         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3353         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3354                    "using keymap number %lu\n", keymap_id);
3355
3356         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3357                 TPACPI_HOTKEY_MAP_SIZE);
3358
3359         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3360         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3361         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3362         tpacpi_inputdev->keycode = hotkey_keycode_map;
3363         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3364                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3365                         input_set_capability(tpacpi_inputdev, EV_KEY,
3366                                                 hotkey_keycode_map[i]);
3367                 } else {
3368                         if (i < sizeof(hotkey_reserved_mask)*8)
3369                                 hotkey_reserved_mask |= 1 << i;
3370                 }
3371         }
3372
3373         if (tp_features.hotkey_wlsw) {
3374                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3375                 input_report_switch(tpacpi_inputdev,
3376                                     SW_RFKILL_ALL, radiosw_state);
3377         }
3378         if (tp_features.hotkey_tablet) {
3379                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3380                 input_report_switch(tpacpi_inputdev,
3381                                     SW_TABLET_MODE, tabletsw_state);
3382         }
3383
3384         /* Do not issue duplicate brightness change events to
3385          * userspace. tpacpi_detect_brightness_capabilities() must have
3386          * been called before this point  */
3387         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3388                 pr_info("This ThinkPad has standard ACPI backlight "
3389                         "brightness control, supported by the ACPI "
3390                         "video driver\n");
3391                 pr_notice("Disabling thinkpad-acpi brightness events "
3392                           "by default...\n");
3393
3394                 /* Disable brightness up/down on Lenovo thinkpads when
3395                  * ACPI is handling them, otherwise it is plain impossible
3396                  * for userspace to do something even remotely sane */
3397                 hotkey_reserved_mask |=
3398                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3399                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3400                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3401                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3402         }
3403
3404 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3405         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3406                                 & ~hotkey_all_mask
3407                                 & ~hotkey_reserved_mask;
3408
3409         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3410                     "hotkey source mask 0x%08x, polling freq %u\n",
3411                     hotkey_source_mask, hotkey_poll_freq);
3412 #endif
3413
3414         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3415                         "enabling firmware HKEY event interface...\n");
3416         res = hotkey_status_set(true);
3417         if (res) {
3418                 hotkey_exit();
3419                 return res;
3420         }
3421         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3422                                | hotkey_driver_mask)
3423                               & ~hotkey_source_mask);
3424         if (res < 0 && res != -ENXIO) {
3425                 hotkey_exit();
3426                 return res;
3427         }
3428         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3429                                 & ~hotkey_reserved_mask;
3430         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3431                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3432                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3433
3434         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3435                         "legacy ibm/hotkey event reporting over procfs %s\n",
3436                         (hotkey_report_mode < 2) ?
3437                                 "enabled" : "disabled");
3438
3439         tpacpi_inputdev->open = &hotkey_inputdev_open;
3440         tpacpi_inputdev->close = &hotkey_inputdev_close;
3441
3442         hotkey_poll_setup_safe(true);
3443
3444         return 0;
3445
3446 err_exit:
3447         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3448         hotkey_dev_attributes = NULL;
3449
3450         return (res < 0)? res : 1;
3451 }
3452
3453 static bool hotkey_notify_hotkey(const u32 hkey,
3454                                  bool *send_acpi_ev,
3455                                  bool *ignore_acpi_ev)
3456 {
3457         /* 0x1000-0x1FFF: key presses */
3458         unsigned int scancode = hkey & 0xfff;
3459         *send_acpi_ev = true;
3460         *ignore_acpi_ev = false;
3461
3462         /* HKEY event 0x1001 is scancode 0x00 */
3463         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3464                 scancode--;
3465                 if (!(hotkey_source_mask & (1 << scancode))) {
3466                         tpacpi_input_send_key_masked(scancode);
3467                         *send_acpi_ev = false;
3468                 } else {
3469                         *ignore_acpi_ev = true;
3470                 }
3471                 return true;
3472         }
3473         return false;
3474 }
3475
3476 static bool hotkey_notify_wakeup(const u32 hkey,
3477                                  bool *send_acpi_ev,
3478                                  bool *ignore_acpi_ev)
3479 {
3480         /* 0x2000-0x2FFF: Wakeup reason */
3481         *send_acpi_ev = true;
3482         *ignore_acpi_ev = false;
3483
3484         switch (hkey) {
3485         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3486         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3487                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3488                 *ignore_acpi_ev = true;
3489                 break;
3490
3491         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3492         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3493                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3494                 *ignore_acpi_ev = true;
3495                 break;
3496
3497         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3498         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3499                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3500                 /* how to auto-heal: */
3501                 /* 2313: woke up from S3, go to S4/S5 */
3502                 /* 2413: woke up from S4, go to S5 */
3503                 break;
3504
3505         default:
3506                 return false;
3507         }
3508
3509         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3510                 pr_info("woke up due to a hot-unplug request...\n");
3511                 hotkey_wakeup_reason_notify_change();
3512         }
3513         return true;
3514 }
3515
3516 static bool hotkey_notify_usrevent(const u32 hkey,
3517                                  bool *send_acpi_ev,
3518                                  bool *ignore_acpi_ev)
3519 {
3520         /* 0x5000-0x5FFF: human interface helpers */
3521         *send_acpi_ev = true;
3522         *ignore_acpi_ev = false;
3523
3524         switch (hkey) {
3525         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3526         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3527                 return true;
3528
3529         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3530         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3531                 tpacpi_input_send_tabletsw();
3532                 hotkey_tablet_mode_notify_change();
3533                 *send_acpi_ev = false;
3534                 return true;
3535
3536         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3537         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3538         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3539                 /* do not propagate these events */
3540                 *ignore_acpi_ev = true;
3541                 return true;
3542
3543         default:
3544                 return false;
3545         }
3546 }
3547
3548 static void thermal_dump_all_sensors(void);
3549
3550 static bool hotkey_notify_thermal(const u32 hkey,
3551                                  bool *send_acpi_ev,
3552                                  bool *ignore_acpi_ev)
3553 {
3554         bool known = true;
3555
3556         /* 0x6000-0x6FFF: thermal alarms */
3557         *send_acpi_ev = true;
3558         *ignore_acpi_ev = false;
3559
3560         switch (hkey) {
3561         case TP_HKEY_EV_THM_TABLE_CHANGED:
3562                 pr_info("EC reports that Thermal Table has changed\n");
3563                 /* recommended action: do nothing, we don't have
3564                  * Lenovo ATM information */
3565                 return true;
3566         case TP_HKEY_EV_ALARM_BAT_HOT:
3567                 pr_crit("THERMAL ALARM: battery is too hot!\n");
3568                 /* recommended action: warn user through gui */
3569                 break;
3570         case TP_HKEY_EV_ALARM_BAT_XHOT:
3571                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3572                 /* recommended action: immediate sleep/hibernate */
3573                 break;
3574         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3575                 pr_crit("THERMAL ALARM: "
3576                         "a sensor reports something is too hot!\n");
3577                 /* recommended action: warn user through gui, that */
3578                 /* some internal component is too hot */
3579                 break;
3580         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3581                 pr_alert("THERMAL EMERGENCY: "
3582                          "a sensor reports something is extremely hot!\n");
3583                 /* recommended action: immediate sleep/hibernate */
3584                 break;
3585         default:
3586                 pr_alert("THERMAL ALERT: unknown thermal alarm received\n");
3587                 known = false;
3588         }
3589
3590         thermal_dump_all_sensors();
3591
3592         return known;
3593 }
3594
3595 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3596 {
3597         u32 hkey;
3598         bool send_acpi_ev;
3599         bool ignore_acpi_ev;
3600         bool known_ev;
3601
3602         if (event != 0x80) {
3603                 pr_err("unknown HKEY notification event %d\n", event);
3604                 /* forward it to userspace, maybe it knows how to handle it */
3605                 acpi_bus_generate_netlink_event(
3606                                         ibm->acpi->device->pnp.device_class,
3607                                         dev_name(&ibm->acpi->device->dev),
3608                                         event, 0);
3609                 return;
3610         }
3611
3612         while (1) {
3613                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3614                         pr_err("failed to retrieve HKEY event\n");
3615                         return;
3616                 }
3617
3618                 if (hkey == 0) {
3619                         /* queue empty */
3620                         return;
3621                 }
3622
3623                 send_acpi_ev = true;
3624                 ignore_acpi_ev = false;
3625
3626                 switch (hkey >> 12) {
3627                 case 1:
3628                         /* 0x1000-0x1FFF: key presses */
3629                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3630                                                  &ignore_acpi_ev);
3631                         break;
3632                 case 2:
3633                         /* 0x2000-0x2FFF: Wakeup reason */
3634                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3635                                                  &ignore_acpi_ev);
3636                         break;
3637                 case 3:
3638                         /* 0x3000-0x3FFF: bay-related wakeups */
3639                         switch (hkey) {
3640                         case TP_HKEY_EV_BAYEJ_ACK:
3641                                 hotkey_autosleep_ack = 1;
3642                                 pr_info("bay ejected\n");
3643                                 hotkey_wakeup_hotunplug_complete_notify_change();
3644                                 known_ev = true;
3645                                 break;
3646                         case TP_HKEY_EV_OPTDRV_EJ:
3647                                 /* FIXME: kick libata if SATA link offline */
3648                                 known_ev = true;
3649                                 break;
3650                         default:
3651                                 known_ev = false;
3652                         }
3653                         break;
3654                 case 4:
3655                         /* 0x4000-0x4FFF: dock-related wakeups */
3656                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3657                                 hotkey_autosleep_ack = 1;
3658                                 pr_info("undocked\n");
3659                                 hotkey_wakeup_hotunplug_complete_notify_change();
3660                                 known_ev = true;
3661                         } else {
3662                                 known_ev = false;
3663                         }
3664                         break;
3665                 case 5:
3666                         /* 0x5000-0x5FFF: human interface helpers */
3667                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3668                                                  &ignore_acpi_ev);
3669                         break;
3670                 case 6:
3671                         /* 0x6000-0x6FFF: thermal alarms */
3672                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3673                                                  &ignore_acpi_ev);
3674                         break;
3675                 case 7:
3676                         /* 0x7000-0x7FFF: misc */
3677                         if (tp_features.hotkey_wlsw &&
3678                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3679                                 tpacpi_send_radiosw_update();
3680                                 send_acpi_ev = 0;
3681                                 known_ev = true;
3682                                 break;
3683                         }
3684                         /* fallthrough to default */
3685                 default:
3686                         known_ev = false;
3687                 }
3688                 if (!known_ev) {
3689                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3690                         pr_notice("please report the conditions when this "
3691                                   "event happened to %s\n", TPACPI_MAIL);
3692                 }
3693
3694                 /* Legacy events */
3695                 if (!ignore_acpi_ev &&
3696                     (send_acpi_ev || hotkey_report_mode < 2)) {
3697                         acpi_bus_generate_proc_event(ibm->acpi->device,
3698                                                      event, hkey);
3699                 }
3700
3701                 /* netlink events */
3702                 if (!ignore_acpi_ev && send_acpi_ev) {
3703                         acpi_bus_generate_netlink_event(
3704                                         ibm->acpi->device->pnp.device_class,
3705                                         dev_name(&ibm->acpi->device->dev),
3706                                         event, hkey);
3707                 }
3708         }
3709 }
3710
3711 static void hotkey_suspend(pm_message_t state)
3712 {
3713         /* Do these on suspend, we get the events on early resume! */
3714         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3715         hotkey_autosleep_ack = 0;
3716 }
3717
3718 static void hotkey_resume(void)
3719 {
3720         tpacpi_disable_brightness_delay();
3721
3722         if (hotkey_status_set(true) < 0 ||
3723             hotkey_mask_set(hotkey_acpi_mask) < 0)
3724                 pr_err("error while attempting to reset the event "
3725                        "firmware interface\n");
3726
3727         tpacpi_send_radiosw_update();
3728         hotkey_tablet_mode_notify_change();
3729         hotkey_wakeup_reason_notify_change();
3730         hotkey_wakeup_hotunplug_complete_notify_change();
3731         hotkey_poll_setup_safe(false);
3732 }
3733
3734 /* procfs -------------------------------------------------------------- */
3735 static int hotkey_read(struct seq_file *m)
3736 {
3737         int res, status;
3738
3739         if (!tp_features.hotkey) {
3740                 seq_printf(m, "status:\t\tnot supported\n");
3741                 return 0;
3742         }
3743
3744         if (mutex_lock_killable(&hotkey_mutex))
3745                 return -ERESTARTSYS;
3746         res = hotkey_status_get(&status);
3747         if (!res)
3748                 res = hotkey_mask_get();
3749         mutex_unlock(&hotkey_mutex);
3750         if (res)
3751                 return res;
3752
3753         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3754         if (hotkey_all_mask) {
3755                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3756                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3757         } else {
3758                 seq_printf(m, "mask:\t\tnot supported\n");
3759                 seq_printf(m, "commands:\tenable, disable, reset\n");
3760         }
3761
3762         return 0;
3763 }
3764
3765 static void hotkey_enabledisable_warn(bool enable)
3766 {
3767         tpacpi_log_usertask("procfs hotkey enable/disable");
3768         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3769                   pr_fmt("hotkey enable/disable functionality has been "
3770                          "removed from the driver.  "
3771                          "Hotkeys are always enabled.\n")))
3772                 pr_err("Please remove the hotkey=enable module "
3773                        "parameter, it is deprecated.  "
3774                        "Hotkeys are always enabled.\n");
3775 }
3776
3777 static int hotkey_write(char *buf)
3778 {
3779         int res;
3780         u32 mask;
3781         char *cmd;
3782
3783         if (!tp_features.hotkey)
3784                 return -ENODEV;
3785
3786         if (mutex_lock_killable(&hotkey_mutex))
3787                 return -ERESTARTSYS;
3788
3789         mask = hotkey_user_mask;
3790
3791         res = 0;
3792         while ((cmd = next_cmd(&buf))) {
3793                 if (strlencmp(cmd, "enable") == 0) {
3794                         hotkey_enabledisable_warn(1);
3795                 } else if (strlencmp(cmd, "disable") == 0) {
3796                         hotkey_enabledisable_warn(0);
3797                         res = -EPERM;
3798                 } else if (strlencmp(cmd, "reset") == 0) {
3799                         mask = (hotkey_all_mask | hotkey_source_mask)
3800                                 & ~hotkey_reserved_mask;
3801                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3802                         /* mask set */
3803                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3804                         /* mask set */
3805                 } else {
3806                         res = -EINVAL;
3807                         goto errexit;
3808                 }
3809         }
3810
3811         if (!res) {
3812                 tpacpi_disclose_usertask("procfs hotkey",
3813                         "set mask to 0x%08x\n", mask);
3814                 res = hotkey_user_mask_set(mask);
3815         }
3816
3817 errexit:
3818         mutex_unlock(&hotkey_mutex);
3819         return res;
3820 }
3821
3822 static const struct acpi_device_id ibm_htk_device_ids[] = {
3823         {TPACPI_ACPI_IBM_HKEY_HID, 0},
3824         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3825         {"", 0},
3826 };
3827
3828 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3829         .hid = ibm_htk_device_ids,
3830         .notify = hotkey_notify,
3831         .handle = &hkey_handle,
3832         .type = ACPI_DEVICE_NOTIFY,
3833 };
3834
3835 static struct ibm_struct hotkey_driver_data = {
3836         .name = "hotkey",
3837         .read = hotkey_read,
3838         .write = hotkey_write,
3839         .exit = hotkey_exit,
3840         .resume = hotkey_resume,
3841         .suspend = hotkey_suspend,
3842         .acpi = &ibm_hotkey_acpidriver,
3843 };
3844
3845 /*************************************************************************
3846  * Bluetooth subdriver
3847  */
3848
3849 enum {
3850         /* ACPI GBDC/SBDC bits */
3851         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3852         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3853         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3854                                                    0 = disable, 1 = enable */
3855 };
3856
3857 enum {
3858         /* ACPI \BLTH commands */
3859         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3860         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3861         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3862         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3863         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3864 };
3865
3866 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3867
3868 static int bluetooth_get_status(void)
3869 {
3870         int status;
3871
3872 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3873         if (dbg_bluetoothemul)
3874                 return (tpacpi_bluetooth_emulstate) ?
3875                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3876 #endif
3877
3878         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3879                 return -EIO;
3880
3881         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3882                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3883 }
3884
3885 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3886 {
3887         int status;
3888
3889         vdbg_printk(TPACPI_DBG_RFKILL,
3890                 "will attempt to %s bluetooth\n",
3891                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3892
3893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3894         if (dbg_bluetoothemul) {
3895                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3896                 return 0;
3897         }
3898 #endif
3899
3900         if (state == TPACPI_RFK_RADIO_ON)
3901                 status = TP_ACPI_BLUETOOTH_RADIOSSW
3902                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
3903         else
3904                 status = 0;
3905
3906         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3907                 return -EIO;
3908
3909         return 0;
3910 }
3911
3912 /* sysfs bluetooth enable ---------------------------------------------- */
3913 static ssize_t bluetooth_enable_show(struct device *dev,
3914                            struct device_attribute *attr,
3915                            char *buf)
3916 {
3917         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3918                         attr, buf);
3919 }
3920
3921 static ssize_t bluetooth_enable_store(struct device *dev,
3922                             struct device_attribute *attr,
3923                             const char *buf, size_t count)
3924 {
3925         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3926                                 attr, buf, count);
3927 }
3928
3929 static struct device_attribute dev_attr_bluetooth_enable =
3930         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3931                 bluetooth_enable_show, bluetooth_enable_store);
3932
3933 /* --------------------------------------------------------------------- */
3934
3935 static struct attribute *bluetooth_attributes[] = {
3936         &dev_attr_bluetooth_enable.attr,
3937         NULL
3938 };
3939
3940 static const struct attribute_group bluetooth_attr_group = {
3941         .attrs = bluetooth_attributes,
3942 };
3943
3944 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3945         .get_status = bluetooth_get_status,
3946         .set_status = bluetooth_set_status,
3947 };
3948
3949 static void bluetooth_shutdown(void)
3950 {
3951         /* Order firmware to save current state to NVRAM */
3952         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3953                         TP_ACPI_BLTH_SAVE_STATE))
3954                 pr_notice("failed to save bluetooth state to NVRAM\n");
3955         else
3956                 vdbg_printk(TPACPI_DBG_RFKILL,
3957                         "bluestooth state saved to NVRAM\n");
3958 }
3959
3960 static void bluetooth_exit(void)
3961 {
3962         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3963                         &bluetooth_attr_group);
3964
3965         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3966
3967         bluetooth_shutdown();
3968 }
3969
3970 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3971 {
3972         int res;
3973         int status = 0;
3974
3975         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3976                         "initializing bluetooth subdriver\n");
3977
3978         TPACPI_ACPIHANDLE_INIT(hkey);
3979
3980         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3981            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3982         tp_features.bluetooth = hkey_handle &&
3983             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3984
3985         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3986                 "bluetooth is %s, status 0x%02x\n",
3987                 str_supported(tp_features.bluetooth),
3988                 status);
3989
3990 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3991         if (dbg_bluetoothemul) {
3992                 tp_features.bluetooth = 1;
3993                 pr_info("bluetooth switch emulation enabled\n");
3994         } else
3995 #endif
3996         if (tp_features.bluetooth &&
3997             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3998                 /* no bluetooth hardware present in system */
3999                 tp_features.bluetooth = 0;
4000                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4001                            "bluetooth hardware not installed\n");
4002         }
4003
4004         if (!tp_features.bluetooth)
4005                 return 1;
4006
4007         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4008                                 &bluetooth_tprfk_ops,
4009                                 RFKILL_TYPE_BLUETOOTH,
4010                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4011                                 true);
4012         if (res)
4013                 return res;
4014
4015         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4016                                 &bluetooth_attr_group);
4017         if (res) {
4018                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4019                 return res;
4020         }
4021
4022         return 0;
4023 }
4024
4025 /* procfs -------------------------------------------------------------- */
4026 static int bluetooth_read(struct seq_file *m)
4027 {
4028         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4029 }
4030
4031 static int bluetooth_write(char *buf)
4032 {
4033         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4034 }
4035
4036 static struct ibm_struct bluetooth_driver_data = {
4037         .name = "bluetooth",
4038         .read = bluetooth_read,
4039         .write = bluetooth_write,
4040         .exit = bluetooth_exit,
4041         .shutdown = bluetooth_shutdown,
4042 };
4043
4044 /*************************************************************************
4045  * Wan subdriver
4046  */
4047
4048 enum {
4049         /* ACPI GWAN/SWAN bits */
4050         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4051         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4052         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4053                                                    0 = disable, 1 = enable */
4054 };
4055
4056 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4057
4058 static int wan_get_status(void)
4059 {
4060         int status;
4061
4062 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4063         if (dbg_wwanemul)
4064                 return (tpacpi_wwan_emulstate) ?
4065                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4066 #endif
4067
4068         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4069                 return -EIO;
4070
4071         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4072                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4073 }
4074
4075 static int wan_set_status(enum tpacpi_rfkill_state state)
4076 {
4077         int status;
4078
4079         vdbg_printk(TPACPI_DBG_RFKILL,
4080                 "will attempt to %s wwan\n",
4081                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4082
4083 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4084         if (dbg_wwanemul) {
4085                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4086                 return 0;
4087         }
4088 #endif
4089
4090         if (state == TPACPI_RFK_RADIO_ON)
4091                 status = TP_ACPI_WANCARD_RADIOSSW
4092                          | TP_ACPI_WANCARD_RESUMECTRL;
4093         else
4094                 status = 0;
4095
4096         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4097                 return -EIO;
4098
4099         return 0;
4100 }
4101
4102 /* sysfs wan enable ---------------------------------------------------- */
4103 static ssize_t wan_enable_show(struct device *dev,
4104                            struct device_attribute *attr,
4105                            char *buf)
4106 {
4107         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4108                         attr, buf);
4109 }
4110
4111 static ssize_t wan_enable_store(struct device *dev,
4112                             struct device_attribute *attr,
4113                             const char *buf, size_t count)
4114 {
4115         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4116                         attr, buf, count);
4117 }
4118
4119 static struct device_attribute dev_attr_wan_enable =
4120         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4121                 wan_enable_show, wan_enable_store);
4122
4123 /* --------------------------------------------------------------------- */
4124
4125 static struct attribute *wan_attributes[] = {
4126         &dev_attr_wan_enable.attr,
4127         NULL
4128 };
4129
4130 static const struct attribute_group wan_attr_group = {
4131         .attrs = wan_attributes,
4132 };
4133
4134 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4135         .get_status = wan_get_status,
4136         .set_status = wan_set_status,
4137 };
4138
4139 static void wan_shutdown(void)
4140 {
4141         /* Order firmware to save current state to NVRAM */
4142         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4143                         TP_ACPI_WGSV_SAVE_STATE))
4144                 pr_notice("failed to save WWAN state to NVRAM\n");
4145         else
4146                 vdbg_printk(TPACPI_DBG_RFKILL,
4147                         "WWAN state saved to NVRAM\n");
4148 }
4149
4150 static void wan_exit(void)
4151 {
4152         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4153                 &wan_attr_group);
4154
4155         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4156
4157         wan_shutdown();
4158 }
4159
4160 static int __init wan_init(struct ibm_init_struct *iibm)
4161 {
4162         int res;
4163         int status = 0;
4164
4165         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4166                         "initializing wan subdriver\n");
4167
4168         TPACPI_ACPIHANDLE_INIT(hkey);
4169
4170         tp_features.wan = hkey_handle &&
4171             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4172
4173         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4174                 "wan is %s, status 0x%02x\n",
4175                 str_supported(tp_features.wan),
4176                 status);
4177
4178 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4179         if (dbg_wwanemul) {
4180                 tp_features.wan = 1;
4181                 pr_info("wwan switch emulation enabled\n");
4182         } else
4183 #endif
4184         if (tp_features.wan &&
4185             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4186                 /* no wan hardware present in system */
4187                 tp_features.wan = 0;
4188                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189                            "wan hardware not installed\n");
4190         }
4191
4192         if (!tp_features.wan)
4193                 return 1;
4194
4195         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4196                                 &wan_tprfk_ops,
4197                                 RFKILL_TYPE_WWAN,
4198                                 TPACPI_RFK_WWAN_SW_NAME,
4199                                 true);
4200         if (res)
4201                 return res;
4202
4203         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4204                                 &wan_attr_group);
4205
4206         if (res) {
4207                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4208                 return res;
4209         }
4210
4211         return 0;
4212 }
4213
4214 /* procfs -------------------------------------------------------------- */
4215 static int wan_read(struct seq_file *m)
4216 {
4217         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4218 }
4219
4220 static int wan_write(char *buf)
4221 {
4222         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4223 }
4224
4225 static struct ibm_struct wan_driver_data = {
4226         .name = "wan",
4227         .read = wan_read,
4228         .write = wan_write,
4229         .exit = wan_exit,
4230         .shutdown = wan_shutdown,
4231 };
4232
4233 /*************************************************************************
4234  * UWB subdriver
4235  */
4236
4237 enum {
4238         /* ACPI GUWB/SUWB bits */
4239         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4240         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4241 };
4242
4243 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4244
4245 static int uwb_get_status(void)
4246 {
4247         int status;
4248
4249 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4250         if (dbg_uwbemul)
4251                 return (tpacpi_uwb_emulstate) ?
4252                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4253 #endif
4254
4255         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4256                 return -EIO;
4257
4258         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4259                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4260 }
4261
4262 static int uwb_set_status(enum tpacpi_rfkill_state state)
4263 {
4264         int status;
4265
4266         vdbg_printk(TPACPI_DBG_RFKILL,
4267                 "will attempt to %s UWB\n",
4268                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4269
4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4271         if (dbg_uwbemul) {
4272                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4273                 return 0;
4274         }
4275 #endif
4276
4277         if (state == TPACPI_RFK_RADIO_ON)
4278                 status = TP_ACPI_UWB_RADIOSSW;
4279         else
4280                 status = 0;
4281
4282         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4283                 return -EIO;
4284
4285         return 0;
4286 }
4287
4288 /* --------------------------------------------------------------------- */
4289
4290 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4291         .get_status = uwb_get_status,
4292         .set_status = uwb_set_status,
4293 };
4294
4295 static void uwb_exit(void)
4296 {
4297         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4298 }
4299
4300 static int __init uwb_init(struct ibm_init_struct *iibm)
4301 {
4302         int res;
4303         int status = 0;
4304
4305         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4306                         "initializing uwb subdriver\n");
4307
4308         TPACPI_ACPIHANDLE_INIT(hkey);
4309
4310         tp_features.uwb = hkey_handle &&
4311             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4312
4313         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4314                 "uwb is %s, status 0x%02x\n",
4315                 str_supported(tp_features.uwb),
4316                 status);
4317
4318 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4319         if (dbg_uwbemul) {
4320                 tp_features.uwb = 1;
4321                 pr_info("uwb switch emulation enabled\n");
4322         } else
4323 #endif
4324         if (tp_features.uwb &&
4325             !(status & TP_ACPI_UWB_HWPRESENT)) {
4326                 /* no uwb hardware present in system */
4327                 tp_features.uwb = 0;
4328                 dbg_printk(TPACPI_DBG_INIT,
4329                            "uwb hardware not installed\n");
4330         }
4331
4332         if (!tp_features.uwb)
4333                 return 1;
4334
4335         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4336                                 &uwb_tprfk_ops,
4337                                 RFKILL_TYPE_UWB,
4338                                 TPACPI_RFK_UWB_SW_NAME,
4339                                 false);
4340         return res;
4341 }
4342
4343 static struct ibm_struct uwb_driver_data = {
4344         .name = "uwb",
4345         .exit = uwb_exit,
4346         .flags.experimental = 1,
4347 };
4348
4349 /*************************************************************************
4350  * Video subdriver
4351  */
4352
4353 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4354
4355 enum video_access_mode {
4356         TPACPI_VIDEO_NONE = 0,
4357         TPACPI_VIDEO_570,       /* 570 */
4358         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4359         TPACPI_VIDEO_NEW,       /* all others */
4360 };
4361
4362 enum {  /* video status flags, based on VIDEO_570 */
4363         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4364         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4365         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4366 };
4367
4368 enum {  /* TPACPI_VIDEO_570 constants */
4369         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4370         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4371                                                  * video_status_flags */
4372         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4373         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4374 };
4375
4376 static enum video_access_mode video_supported;
4377 static int video_orig_autosw;
4378
4379 static int video_autosw_get(void);
4380 static int video_autosw_set(int enable);
4381
4382 TPACPI_HANDLE(vid, root,
4383               "\\_SB.PCI.AGP.VGA",      /* 570 */
4384               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4385               "\\_SB.PCI0.VID0",        /* 770e */
4386               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4387               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4388               "\\_SB.PCI0.AGP.VID",     /* all others */
4389         );                              /* R30, R31 */
4390
4391 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4392
4393 static int __init video_init(struct ibm_init_struct *iibm)
4394 {
4395         int ivga;
4396
4397         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4398
4399         TPACPI_ACPIHANDLE_INIT(vid);
4400         if (tpacpi_is_ibm())
4401                 TPACPI_ACPIHANDLE_INIT(vid2);
4402
4403         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4404                 /* G41, assume IVGA doesn't change */
4405                 vid_handle = vid2_handle;
4406
4407         if (!vid_handle)
4408                 /* video switching not supported on R30, R31 */
4409                 video_supported = TPACPI_VIDEO_NONE;
4410         else if (tpacpi_is_ibm() &&
4411                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4412                 /* 570 */
4413                 video_supported = TPACPI_VIDEO_570;
4414         else if (tpacpi_is_ibm() &&
4415                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4416                 /* 600e/x, 770e, 770x */
4417                 video_supported = TPACPI_VIDEO_770;
4418         else
4419                 /* all others */
4420                 video_supported = TPACPI_VIDEO_NEW;
4421
4422         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4423                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4424                 video_supported);
4425
4426         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4427 }
4428
4429 static void video_exit(void)
4430 {
4431         dbg_printk(TPACPI_DBG_EXIT,
4432                    "restoring original video autoswitch mode\n");
4433         if (video_autosw_set(video_orig_autosw))
4434                 pr_err("error while trying to restore original "
4435                         "video autoswitch mode\n");
4436 }
4437
4438 static int video_outputsw_get(void)
4439 {
4440         int status = 0;
4441         int i;
4442
4443         switch (video_supported) {
4444         case TPACPI_VIDEO_570:
4445                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4446                                  TP_ACPI_VIDEO_570_PHSCMD))
4447                         return -EIO;
4448                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4449                 break;
4450         case TPACPI_VIDEO_770:
4451                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4452                         return -EIO;
4453                 if (i)
4454                         status |= TP_ACPI_VIDEO_S_LCD;
4455                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4456                         return -EIO;
4457                 if (i)
4458                         status |= TP_ACPI_VIDEO_S_CRT;
4459                 break;
4460         case TPACPI_VIDEO_NEW:
4461                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4462                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4463                         return -EIO;
4464                 if (i)
4465                         status |= TP_ACPI_VIDEO_S_CRT;
4466
4467                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4468                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4469                         return -EIO;
4470                 if (i)
4471                         status |= TP_ACPI_VIDEO_S_LCD;
4472                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4473                         return -EIO;
4474                 if (i)
4475                         status |= TP_ACPI_VIDEO_S_DVI;
4476                 break;
4477         default:
4478                 return -ENOSYS;
4479         }
4480
4481         return status;
4482 }
4483
4484 static int video_outputsw_set(int status)
4485 {
4486         int autosw;
4487         int res = 0;
4488
4489         switch (video_supported) {
4490         case TPACPI_VIDEO_570:
4491                 res = acpi_evalf(NULL, NULL,
4492                                  "\\_SB.PHS2", "vdd",
4493                                  TP_ACPI_VIDEO_570_PHS2CMD,
4494                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4495                 break;
4496         case TPACPI_VIDEO_770:
4497                 autosw = video_autosw_get();
4498                 if (autosw < 0)
4499                         return autosw;
4500
4501                 res = video_autosw_set(1);
4502                 if (res)
4503                         return res;
4504                 res = acpi_evalf(vid_handle, NULL,
4505                                  "ASWT", "vdd", status * 0x100, 0);
4506                 if (!autosw && video_autosw_set(autosw)) {
4507                         pr_err("video auto-switch left enabled due to error\n");
4508                         return -EIO;
4509                 }
4510                 break;
4511         case TPACPI_VIDEO_NEW:
4512                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4513                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4514                 break;
4515         default:
4516                 return -ENOSYS;
4517         }
4518
4519         return (res)? 0 : -EIO;
4520 }
4521
4522 static int video_autosw_get(void)
4523 {
4524         int autosw = 0;
4525
4526         switch (video_supported) {
4527         case TPACPI_VIDEO_570:
4528                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4529                         return -EIO;
4530                 break;
4531         case TPACPI_VIDEO_770:
4532         case TPACPI_VIDEO_NEW:
4533                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4534                         return -EIO;
4535                 break;
4536         default:
4537                 return -ENOSYS;
4538         }
4539
4540         return autosw & 1;
4541 }
4542
4543 static int video_autosw_set(int enable)
4544 {
4545         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4546                 return -EIO;
4547         return 0;
4548 }
4549
4550 static int video_outputsw_cycle(void)
4551 {
4552         int autosw = video_autosw_get();
4553         int res;
4554
4555         if (autosw < 0)
4556                 return autosw;
4557
4558         switch (video_supported) {
4559         case TPACPI_VIDEO_570:
4560                 res = video_autosw_set(1);
4561                 if (res)
4562                         return res;
4563                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4564                 break;
4565         case TPACPI_VIDEO_770:
4566         case TPACPI_VIDEO_NEW:
4567                 res = video_autosw_set(1);
4568                 if (res)
4569                         return res;
4570                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4571                 break;
4572         default:
4573                 return -ENOSYS;
4574         }
4575         if (!autosw && video_autosw_set(autosw)) {
4576                 pr_err("video auto-switch left enabled due to error\n");
4577                 return -EIO;
4578         }
4579
4580         return (res)? 0 : -EIO;
4581 }
4582
4583 static int video_expand_toggle(void)
4584 {
4585         switch (video_supported) {
4586         case TPACPI_VIDEO_570:
4587                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4588                         0 : -EIO;
4589         case TPACPI_VIDEO_770:
4590                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4591                         0 : -EIO;
4592         case TPACPI_VIDEO_NEW:
4593                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4594                         0 : -EIO;
4595         default:
4596                 return -ENOSYS;
4597         }
4598         /* not reached */
4599 }
4600
4601 static int video_read(struct seq_file *m)
4602 {
4603         int status, autosw;
4604
4605         if (video_supported == TPACPI_VIDEO_NONE) {
4606                 seq_printf(m, "status:\t\tnot supported\n");
4607                 return 0;
4608         }
4609
4610         /* Even reads can crash X.org, so... */
4611         if (!capable(CAP_SYS_ADMIN))
4612                 return -EPERM;
4613
4614         status = video_outputsw_get();
4615         if (status < 0)
4616                 return status;
4617
4618         autosw = video_autosw_get();
4619         if (autosw < 0)
4620                 return autosw;
4621
4622         seq_printf(m, "status:\t\tsupported\n");
4623         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4624         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4625         if (video_supported == TPACPI_VIDEO_NEW)
4626                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4627         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4628         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4629         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4630         if (video_supported == TPACPI_VIDEO_NEW)
4631                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4632         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4633         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4634
4635         return 0;
4636 }
4637
4638 static int video_write(char *buf)
4639 {
4640         char *cmd;
4641         int enable, disable, status;
4642         int res;
4643
4644         if (video_supported == TPACPI_VIDEO_NONE)
4645                 return -ENODEV;
4646
4647         /* Even reads can crash X.org, let alone writes... */
4648         if (!capable(CAP_SYS_ADMIN))
4649                 return -EPERM;
4650
4651         enable = 0;
4652         disable = 0;
4653
4654         while ((cmd = next_cmd(&buf))) {
4655                 if (strlencmp(cmd, "lcd_enable") == 0) {
4656                         enable |= TP_ACPI_VIDEO_S_LCD;
4657                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4658                         disable |= TP_ACPI_VIDEO_S_LCD;
4659                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4660                         enable |= TP_ACPI_VIDEO_S_CRT;
4661                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4662                         disable |= TP_ACPI_VIDEO_S_CRT;
4663                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4664                            strlencmp(cmd, "dvi_enable") == 0) {
4665                         enable |= TP_ACPI_VIDEO_S_DVI;
4666                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4667                            strlencmp(cmd, "dvi_disable") == 0) {
4668                         disable |= TP_ACPI_VIDEO_S_DVI;
4669                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4670                         res = video_autosw_set(1);
4671                         if (res)
4672                                 return res;
4673                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4674                         res = video_autosw_set(0);
4675                         if (res)
4676                                 return res;
4677                 } else if (strlencmp(cmd, "video_switch") == 0) {
4678                         res = video_outputsw_cycle();
4679                         if (res)
4680                                 return res;
4681                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4682                         res = video_expand_toggle();
4683                         if (res)
4684                                 return res;
4685                 } else
4686                         return -EINVAL;
4687         }
4688
4689         if (enable || disable) {
4690                 status = video_outputsw_get();
4691                 if (status < 0)
4692                         return status;
4693                 res = video_outputsw_set((status & ~disable) | enable);
4694                 if (res)
4695                         return res;
4696         }
4697
4698         return 0;
4699 }
4700
4701 static struct ibm_struct video_driver_data = {
4702         .name = "video",
4703         .read = video_read,
4704         .write = video_write,
4705         .exit = video_exit,
4706 };
4707
4708 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4709
4710 /*************************************************************************
4711  * Light (thinklight) subdriver
4712  */
4713
4714 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4715 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4716
4717 static int light_get_status(void)
4718 {
4719         int status = 0;
4720
4721         if (tp_features.light_status) {
4722                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4723                         return -EIO;
4724                 return (!!status);
4725         }
4726
4727         return -ENXIO;
4728 }
4729
4730 static int light_set_status(int status)
4731 {
4732         int rc;
4733
4734         if (tp_features.light) {
4735                 if (cmos_handle) {
4736                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4737                                         (status)?
4738                                                 TP_CMOS_THINKLIGHT_ON :
4739                                                 TP_CMOS_THINKLIGHT_OFF);
4740                 } else {
4741                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4742                                         (status)? 1 : 0);
4743                 }
4744                 return (rc)? 0 : -EIO;
4745         }
4746
4747         return -ENXIO;
4748 }
4749
4750 static void light_set_status_worker(struct work_struct *work)
4751 {
4752         struct tpacpi_led_classdev *data =
4753                         container_of(work, struct tpacpi_led_classdev, work);
4754
4755         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4756                 light_set_status((data->new_state != TPACPI_LED_OFF));
4757 }
4758
4759 static void light_sysfs_set(struct led_classdev *led_cdev,
4760                         enum led_brightness brightness)
4761 {
4762         struct tpacpi_led_classdev *data =
4763                 container_of(led_cdev,
4764                              struct tpacpi_led_classdev,
4765                              led_classdev);
4766         data->new_state = (brightness != LED_OFF) ?
4767                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4768         queue_work(tpacpi_wq, &data->work);
4769 }
4770
4771 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4772 {
4773         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4774 }
4775
4776 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4777         .led_classdev = {
4778                 .name           = "tpacpi::thinklight",
4779                 .brightness_set = &light_sysfs_set,
4780                 .brightness_get = &light_sysfs_get,
4781         }
4782 };
4783
4784 static int __init light_init(struct ibm_init_struct *iibm)
4785 {
4786         int rc;
4787
4788         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4789
4790         if (tpacpi_is_ibm()) {
4791                 TPACPI_ACPIHANDLE_INIT(ledb);
4792                 TPACPI_ACPIHANDLE_INIT(lght);
4793         }
4794         TPACPI_ACPIHANDLE_INIT(cmos);
4795         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4796
4797         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4798         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4799
4800         if (tp_features.light)
4801                 /* light status not supported on
4802                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4803                 tp_features.light_status =
4804                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4805
4806         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4807                 str_supported(tp_features.light),
4808                 str_supported(tp_features.light_status));
4809
4810         if (!tp_features.light)
4811                 return 1;
4812
4813         rc = led_classdev_register(&tpacpi_pdev->dev,
4814                                    &tpacpi_led_thinklight.led_classdev);
4815
4816         if (rc < 0) {
4817                 tp_features.light = 0;
4818                 tp_features.light_status = 0;
4819         } else  {
4820                 rc = 0;
4821         }
4822
4823         return rc;
4824 }
4825
4826 static void light_exit(void)
4827 {
4828         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4829         if (work_pending(&tpacpi_led_thinklight.work))
4830                 flush_workqueue(tpacpi_wq);
4831 }
4832
4833 static int light_read(struct seq_file *m)
4834 {
4835         int status;
4836
4837         if (!tp_features.light) {
4838                 seq_printf(m, "status:\t\tnot supported\n");
4839         } else if (!tp_features.light_status) {
4840                 seq_printf(m, "status:\t\tunknown\n");
4841                 seq_printf(m, "commands:\ton, off\n");
4842         } else {
4843                 status = light_get_status();
4844                 if (status < 0)
4845                         return status;
4846                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4847                 seq_printf(m, "commands:\ton, off\n");
4848         }
4849
4850         return 0;
4851 }
4852
4853 static int light_write(char *buf)
4854 {
4855         char *cmd;
4856         int newstatus = 0;
4857
4858         if (!tp_features.light)
4859                 return -ENODEV;
4860
4861         while ((cmd = next_cmd(&buf))) {
4862                 if (strlencmp(cmd, "on") == 0) {
4863                         newstatus = 1;
4864                 } else if (strlencmp(cmd, "off") == 0) {
4865                         newstatus = 0;
4866                 } else
4867                         return -EINVAL;
4868         }
4869
4870         return light_set_status(newstatus);
4871 }
4872
4873 static struct ibm_struct light_driver_data = {
4874         .name = "light",
4875         .read = light_read,
4876         .write = light_write,
4877         .exit = light_exit,
4878 };
4879
4880 /*************************************************************************
4881  * CMOS subdriver
4882  */
4883
4884 /* sysfs cmos_command -------------------------------------------------- */
4885 static ssize_t cmos_command_store(struct device *dev,
4886                             struct device_attribute *attr,
4887                             const char *buf, size_t count)
4888 {
4889         unsigned long cmos_cmd;
4890         int res;
4891
4892         if (parse_strtoul(buf, 21, &cmos_cmd))
4893                 return -EINVAL;
4894
4895         res = issue_thinkpad_cmos_command(cmos_cmd);
4896         return (res)? res : count;
4897 }
4898
4899 static struct device_attribute dev_attr_cmos_command =
4900         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4901
4902 /* --------------------------------------------------------------------- */
4903
4904 static int __init cmos_init(struct ibm_init_struct *iibm)
4905 {
4906         int res;
4907
4908         vdbg_printk(TPACPI_DBG_INIT,
4909                 "initializing cmos commands subdriver\n");
4910
4911         TPACPI_ACPIHANDLE_INIT(cmos);
4912
4913         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4914                 str_supported(cmos_handle != NULL));
4915
4916         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4917         if (res)
4918                 return res;
4919
4920         return (cmos_handle)? 0 : 1;
4921 }
4922
4923 static void cmos_exit(void)
4924 {
4925         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4926 }
4927
4928 static int cmos_read(struct seq_file *m)
4929 {
4930         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4931            R30, R31, T20-22, X20-21 */
4932         if (!cmos_handle)
4933                 seq_printf(m, "status:\t\tnot supported\n");
4934         else {
4935                 seq_printf(m, "status:\t\tsupported\n");
4936                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4937         }
4938
4939         return 0;
4940 }
4941
4942 static int cmos_write(char *buf)
4943 {
4944         char *cmd;
4945         int cmos_cmd, res;
4946
4947         while ((cmd = next_cmd(&buf))) {
4948                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4949                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4950                         /* cmos_cmd set */
4951                 } else
4952                         return -EINVAL;
4953
4954                 res = issue_thinkpad_cmos_command(cmos_cmd);
4955                 if (res)
4956                         return res;
4957         }
4958
4959         return 0;
4960 }
4961
4962 static struct ibm_struct cmos_driver_data = {
4963         .name = "cmos",
4964         .read = cmos_read,
4965         .write = cmos_write,
4966         .exit = cmos_exit,
4967 };
4968
4969 /*************************************************************************
4970  * LED subdriver
4971  */
4972
4973 enum led_access_mode {
4974         TPACPI_LED_NONE = 0,
4975         TPACPI_LED_570, /* 570 */
4976         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4977         TPACPI_LED_NEW, /* all others */
4978 };
4979
4980 enum {  /* For TPACPI_LED_OLD */
4981         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4982         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4983         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4984 };
4985
4986 static enum led_access_mode led_supported;
4987
4988 static acpi_handle led_handle;
4989
4990 #define TPACPI_LED_NUMLEDS 16
4991 static struct tpacpi_led_classdev *tpacpi_leds;
4992 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4993 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4994         /* there's a limit of 19 chars + NULL before 2.6.26 */
4995         "tpacpi::power",
4996         "tpacpi:orange:batt",
4997         "tpacpi:green:batt",
4998         "tpacpi::dock_active",
4999         "tpacpi::bay_active",
5000         "tpacpi::dock_batt",
5001         "tpacpi::unknown_led",
5002         "tpacpi::standby",
5003         "tpacpi::dock_status1",
5004         "tpacpi::dock_status2",
5005         "tpacpi::unknown_led2",
5006         "tpacpi::unknown_led3",
5007         "tpacpi::thinkvantage",
5008 };
5009 #define TPACPI_SAFE_LEDS        0x1081U
5010
5011 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5012 {
5013 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5014         return false;
5015 #else
5016         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5017 #endif
5018 }
5019
5020 static int led_get_status(const unsigned int led)
5021 {
5022         int status;
5023         enum led_status_t led_s;
5024
5025         switch (led_supported) {
5026         case TPACPI_LED_570:
5027                 if (!acpi_evalf(ec_handle,
5028                                 &status, "GLED", "dd", 1 << led))
5029                         return -EIO;
5030                 led_s = (status == 0)?
5031                                 TPACPI_LED_OFF :
5032                                 ((status == 1)?
5033                                         TPACPI_LED_ON :
5034                                         TPACPI_LED_BLINK);
5035                 tpacpi_led_state_cache[led] = led_s;
5036                 return led_s;
5037         default:
5038                 return -ENXIO;
5039         }
5040
5041         /* not reached */
5042 }
5043
5044 static int led_set_status(const unsigned int led,
5045                           const enum led_status_t ledstatus)
5046 {
5047         /* off, on, blink. Index is led_status_t */
5048         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5049         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5050
5051         int rc = 0;
5052
5053         switch (led_supported) {
5054         case TPACPI_LED_570:
5055                 /* 570 */
5056                 if (unlikely(led > 7))
5057                         return -EINVAL;
5058                 if (unlikely(tpacpi_is_led_restricted(led)))
5059                         return -EPERM;
5060                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5061                                 (1 << led), led_sled_arg1[ledstatus]))
5062                         rc = -EIO;
5063                 break;
5064         case TPACPI_LED_OLD:
5065                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5066                 if (unlikely(led > 7))
5067                         return -EINVAL;
5068                 if (unlikely(tpacpi_is_led_restricted(led)))
5069                         return -EPERM;
5070                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5071                 if (rc >= 0)
5072                         rc = ec_write(TPACPI_LED_EC_HLBL,
5073                                       (ledstatus == TPACPI_LED_BLINK) << led);
5074                 if (rc >= 0)
5075                         rc = ec_write(TPACPI_LED_EC_HLCL,
5076                                       (ledstatus != TPACPI_LED_OFF) << led);
5077                 break;
5078         case TPACPI_LED_NEW:
5079                 /* all others */
5080                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5081                         return -EINVAL;
5082                 if (unlikely(tpacpi_is_led_restricted(led)))
5083                         return -EPERM;
5084                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5085                                 led, led_led_arg1[ledstatus]))
5086                         rc = -EIO;
5087                 break;
5088         default:
5089                 rc = -ENXIO;
5090         }
5091
5092         if (!rc)
5093                 tpacpi_led_state_cache[led] = ledstatus;
5094
5095         return rc;
5096 }
5097
5098 static void led_set_status_worker(struct work_struct *work)
5099 {
5100         struct tpacpi_led_classdev *data =
5101                 container_of(work, struct tpacpi_led_classdev, work);
5102
5103         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5104                 led_set_status(data->led, data->new_state);
5105 }
5106
5107 static void led_sysfs_set(struct led_classdev *led_cdev,
5108                         enum led_brightness brightness)
5109 {
5110         struct tpacpi_led_classdev *data = container_of(led_cdev,
5111                              struct tpacpi_led_classdev, led_classdev);
5112
5113         if (brightness == LED_OFF)
5114                 data->new_state = TPACPI_LED_OFF;
5115         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5116                 data->new_state = TPACPI_LED_ON;
5117         else
5118                 data->new_state = TPACPI_LED_BLINK;
5119
5120         queue_work(tpacpi_wq, &data->work);
5121 }
5122
5123 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5124                         unsigned long *delay_on, unsigned long *delay_off)
5125 {
5126         struct tpacpi_led_classdev *data = container_of(led_cdev,
5127                              struct tpacpi_led_classdev, led_classdev);
5128
5129         /* Can we choose the flash rate? */
5130         if (*delay_on == 0 && *delay_off == 0) {
5131                 /* yes. set them to the hardware blink rate (1 Hz) */
5132                 *delay_on = 500; /* ms */
5133                 *delay_off = 500; /* ms */
5134         } else if ((*delay_on != 500) || (*delay_off != 500))
5135                 return -EINVAL;
5136
5137         data->new_state = TPACPI_LED_BLINK;
5138         queue_work(tpacpi_wq, &data->work);
5139
5140         return 0;
5141 }
5142
5143 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5144 {
5145         int rc;
5146
5147         struct tpacpi_led_classdev *data = container_of(led_cdev,
5148                              struct tpacpi_led_classdev, led_classdev);
5149
5150         rc = led_get_status(data->led);
5151
5152         if (rc == TPACPI_LED_OFF || rc < 0)
5153                 rc = LED_OFF;   /* no error handling in led class :( */
5154         else
5155                 rc = LED_FULL;
5156
5157         return rc;
5158 }
5159
5160 static void led_exit(void)
5161 {
5162         unsigned int i;
5163
5164         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5165                 if (tpacpi_leds[i].led_classdev.name)
5166                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5167         }
5168
5169         kfree(tpacpi_leds);
5170 }
5171
5172 static int __init tpacpi_init_led(unsigned int led)
5173 {
5174         int rc;
5175
5176         tpacpi_leds[led].led = led;
5177
5178         /* LEDs with no name don't get registered */
5179         if (!tpacpi_led_names[led])
5180                 return 0;
5181
5182         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5183         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5184         if (led_supported == TPACPI_LED_570)
5185                 tpacpi_leds[led].led_classdev.brightness_get =
5186                                                 &led_sysfs_get;
5187
5188         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5189
5190         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5191
5192         rc = led_classdev_register(&tpacpi_pdev->dev,
5193                                 &tpacpi_leds[led].led_classdev);
5194         if (rc < 0)
5195                 tpacpi_leds[led].led_classdev.name = NULL;
5196
5197         return rc;
5198 }
5199
5200 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5201         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5202         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5203         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5204
5205         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5206         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5207         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5208         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5209         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5210         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5211         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5212         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5213
5214         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5215         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5216         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5217         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5218         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5219
5220         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5221         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5222         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5223         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5224
5225         /* (1) - may have excess leds enabled on MSB */
5226
5227         /* Defaults (order matters, keep last, don't reorder!) */
5228         { /* Lenovo */
5229           .vendor = PCI_VENDOR_ID_LENOVO,
5230           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5231           .quirks = 0x1fffU,
5232         },
5233         { /* IBM ThinkPads with no EC version string */
5234           .vendor = PCI_VENDOR_ID_IBM,
5235           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5236           .quirks = 0x00ffU,
5237         },
5238         { /* IBM ThinkPads with EC version string */
5239           .vendor = PCI_VENDOR_ID_IBM,
5240           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5241           .quirks = 0x00bfU,
5242         },
5243 };
5244
5245 #undef TPACPI_LEDQ_IBM
5246 #undef TPACPI_LEDQ_LNV
5247
5248 static enum led_access_mode __init led_init_detect_mode(void)
5249 {
5250         acpi_status status;
5251
5252         if (tpacpi_is_ibm()) {
5253                 /* 570 */
5254                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5255                 if (ACPI_SUCCESS(status))
5256                         return TPACPI_LED_570;
5257
5258                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5259                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5260                 if (ACPI_SUCCESS(status))
5261                         return TPACPI_LED_OLD;
5262         }
5263
5264         /* most others */
5265         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5266         if (ACPI_SUCCESS(status))
5267                 return TPACPI_LED_NEW;
5268
5269         /* R30, R31, and unknown firmwares */
5270         led_handle = NULL;
5271         return TPACPI_LED_NONE;
5272 }
5273
5274 static int __init led_init(struct ibm_init_struct *iibm)
5275 {
5276         unsigned int i;
5277         int rc;
5278         unsigned long useful_leds;
5279
5280         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5281
5282         led_supported = led_init_detect_mode();
5283
5284         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5285                 str_supported(led_supported), led_supported);
5286
5287         if (led_supported == TPACPI_LED_NONE)
5288                 return 1;
5289
5290         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5291                               GFP_KERNEL);
5292         if (!tpacpi_leds) {
5293                 pr_err("Out of memory for LED data\n");
5294                 return -ENOMEM;
5295         }
5296
5297         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5298                                           ARRAY_SIZE(led_useful_qtable));
5299
5300         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5301                 if (!tpacpi_is_led_restricted(i) &&
5302                     test_bit(i, &useful_leds)) {
5303                         rc = tpacpi_init_led(i);
5304                         if (rc < 0) {
5305                                 led_exit();
5306                                 return rc;
5307                         }
5308                 }
5309         }
5310
5311 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5312         pr_notice("warning: userspace override of important "
5313                   "firmware LEDs is enabled\n");
5314 #endif
5315         return 0;
5316 }
5317
5318 #define str_led_status(s) \
5319         ((s) == TPACPI_LED_OFF ? "off" : \
5320                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5321
5322 static int led_read(struct seq_file *m)
5323 {
5324         if (!led_supported) {
5325                 seq_printf(m, "status:\t\tnot supported\n");
5326                 return 0;
5327         }
5328         seq_printf(m, "status:\t\tsupported\n");
5329
5330         if (led_supported == TPACPI_LED_570) {
5331                 /* 570 */
5332                 int i, status;
5333                 for (i = 0; i < 8; i++) {
5334                         status = led_get_status(i);
5335                         if (status < 0)
5336                                 return -EIO;
5337                         seq_printf(m, "%d:\t\t%s\n",
5338                                        i, str_led_status(status));
5339                 }
5340         }
5341
5342         seq_printf(m, "commands:\t"
5343                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5344
5345         return 0;
5346 }
5347
5348 static int led_write(char *buf)
5349 {
5350         char *cmd;
5351         int led, rc;
5352         enum led_status_t s;
5353
5354         if (!led_supported)
5355                 return -ENODEV;
5356
5357         while ((cmd = next_cmd(&buf))) {
5358                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5359                         return -EINVAL;
5360
5361                 if (strstr(cmd, "off")) {
5362                         s = TPACPI_LED_OFF;
5363                 } else if (strstr(cmd, "on")) {
5364                         s = TPACPI_LED_ON;
5365                 } else if (strstr(cmd, "blink")) {
5366                         s = TPACPI_LED_BLINK;
5367                 } else {
5368                         return -EINVAL;
5369                 }
5370
5371                 rc = led_set_status(led, s);
5372                 if (rc < 0)
5373                         return rc;
5374         }
5375
5376         return 0;
5377 }
5378
5379 static struct ibm_struct led_driver_data = {
5380         .name = "led",
5381         .read = led_read,
5382         .write = led_write,
5383         .exit = led_exit,
5384 };
5385
5386 /*************************************************************************
5387  * Beep subdriver
5388  */
5389
5390 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5391
5392 #define TPACPI_BEEP_Q1 0x0001
5393
5394 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5395         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5396         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5397 };
5398
5399 static int __init beep_init(struct ibm_init_struct *iibm)
5400 {
5401         unsigned long quirks;
5402
5403         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5404
5405         TPACPI_ACPIHANDLE_INIT(beep);
5406
5407         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5408                 str_supported(beep_handle != NULL));
5409
5410         quirks = tpacpi_check_quirks(beep_quirk_table,
5411                                      ARRAY_SIZE(beep_quirk_table));
5412
5413         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5414
5415         return (beep_handle)? 0 : 1;
5416 }
5417
5418 static int beep_read(struct seq_file *m)
5419 {
5420         if (!beep_handle)
5421                 seq_printf(m, "status:\t\tnot supported\n");
5422         else {
5423                 seq_printf(m, "status:\t\tsupported\n");
5424                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5425         }
5426
5427         return 0;
5428 }
5429
5430 static int beep_write(char *buf)
5431 {
5432         char *cmd;
5433         int beep_cmd;
5434
5435         if (!beep_handle)
5436                 return -ENODEV;
5437
5438         while ((cmd = next_cmd(&buf))) {
5439                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5440                     beep_cmd >= 0 && beep_cmd <= 17) {
5441                         /* beep_cmd set */
5442                 } else
5443                         return -EINVAL;
5444                 if (tp_features.beep_needs_two_args) {
5445                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5446                                         beep_cmd, 0))
5447                                 return -EIO;
5448                 } else {
5449                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5450                                         beep_cmd))
5451                                 return -EIO;
5452                 }
5453         }
5454
5455         return 0;
5456 }
5457
5458 static struct ibm_struct beep_driver_data = {
5459         .name = "beep",
5460         .read = beep_read,
5461         .write = beep_write,
5462 };
5463
5464 /*************************************************************************
5465  * Thermal subdriver
5466  */
5467
5468 enum thermal_access_mode {
5469         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5470         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5471         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5472         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5473         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5474 };
5475
5476 enum { /* TPACPI_THERMAL_TPEC_* */
5477         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5478         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5479         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5480
5481         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5482 };
5483
5484
5485 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5486 struct ibm_thermal_sensors_struct {
5487         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5488 };
5489
5490 static enum thermal_access_mode thermal_read_mode;
5491
5492 /* idx is zero-based */
5493 static int thermal_get_sensor(int idx, s32 *value)
5494 {
5495         int t;
5496         s8 tmp;
5497         char tmpi[5];
5498
5499         t = TP_EC_THERMAL_TMP0;
5500
5501         switch (thermal_read_mode) {
5502 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5503         case TPACPI_THERMAL_TPEC_16:
5504                 if (idx >= 8 && idx <= 15) {
5505                         t = TP_EC_THERMAL_TMP8;
5506                         idx -= 8;
5507                 }
5508                 /* fallthrough */
5509 #endif
5510         case TPACPI_THERMAL_TPEC_8:
5511                 if (idx <= 7) {
5512                         if (!acpi_ec_read(t + idx, &tmp))
5513                                 return -EIO;
5514                         *value = tmp * 1000;
5515                         return 0;
5516                 }
5517                 break;
5518
5519         case TPACPI_THERMAL_ACPI_UPDT:
5520                 if (idx <= 7) {
5521                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5522                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5523                                 return -EIO;
5524                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5525                                 return -EIO;
5526                         *value = (t - 2732) * 100;
5527                         return 0;
5528                 }
5529                 break;
5530
5531         case TPACPI_THERMAL_ACPI_TMP07:
5532                 if (idx <= 7) {
5533                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5534                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5535                                 return -EIO;
5536                         if (t > 127 || t < -127)
5537                                 t = TP_EC_THERMAL_TMP_NA;
5538                         *value = t * 1000;
5539                         return 0;
5540                 }
5541                 break;
5542
5543         case TPACPI_THERMAL_NONE:
5544         default:
5545                 return -ENOSYS;
5546         }
5547
5548         return -EINVAL;
5549 }
5550
5551 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5552 {
5553         int res, i;
5554         int n;
5555
5556         n = 8;
5557         i = 0;
5558
5559         if (!s)
5560                 return -EINVAL;
5561
5562         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5563                 n = 16;
5564
5565         for (i = 0 ; i < n; i++) {
5566                 res = thermal_get_sensor(i, &s->temp[i]);
5567                 if (res)
5568                         return res;
5569         }
5570
5571         return n;
5572 }
5573
5574 static void thermal_dump_all_sensors(void)
5575 {
5576         int n, i;
5577         struct ibm_thermal_sensors_struct t;
5578
5579         n = thermal_get_sensors(&t);
5580         if (n <= 0)
5581                 return;
5582
5583         pr_notice("temperatures (Celsius):");
5584
5585         for (i = 0; i < n; i++) {
5586                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5587                         pr_cont(" %d", (int)(t.temp[i] / 1000));
5588                 else
5589                         pr_cont(" N/A");
5590         }
5591
5592         pr_cont("\n");
5593 }
5594
5595 /* sysfs temp##_input -------------------------------------------------- */
5596
5597 static ssize_t thermal_temp_input_show(struct device *dev,
5598                            struct device_attribute *attr,
5599                            char *buf)
5600 {
5601         struct sensor_device_attribute *sensor_attr =
5602                                         to_sensor_dev_attr(attr);
5603         int idx = sensor_attr->index;
5604         s32 value;
5605         int res;
5606
5607         res = thermal_get_sensor(idx, &value);
5608         if (res)
5609                 return res;
5610         if (value == TPACPI_THERMAL_SENSOR_NA)
5611                 return -ENXIO;
5612
5613         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5614 }
5615
5616 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5617          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5618                      thermal_temp_input_show, NULL, _idxB)
5619
5620 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5621         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5622         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5623         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5624         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5625         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5626         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5627         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5628         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5629         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5630         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5631         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5632         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5633         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5634         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5635         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5636         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5637 };
5638
5639 #define THERMAL_ATTRS(X) \
5640         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5641
5642 static struct attribute *thermal_temp_input_attr[] = {
5643         THERMAL_ATTRS(8),
5644         THERMAL_ATTRS(9),
5645         THERMAL_ATTRS(10),
5646         THERMAL_ATTRS(11),
5647         THERMAL_ATTRS(12),
5648         THERMAL_ATTRS(13),
5649         THERMAL_ATTRS(14),
5650         THERMAL_ATTRS(15),
5651         THERMAL_ATTRS(0),
5652         THERMAL_ATTRS(1),
5653         THERMAL_ATTRS(2),
5654         THERMAL_ATTRS(3),
5655         THERMAL_ATTRS(4),
5656         THERMAL_ATTRS(5),
5657         THERMAL_ATTRS(6),
5658         THERMAL_ATTRS(7),
5659         NULL
5660 };
5661
5662 static const struct attribute_group thermal_temp_input16_group = {
5663         .attrs = thermal_temp_input_attr
5664 };
5665
5666 static const struct attribute_group thermal_temp_input8_group = {
5667         .attrs = &thermal_temp_input_attr[8]
5668 };
5669
5670 #undef THERMAL_SENSOR_ATTR_TEMP
5671 #undef THERMAL_ATTRS
5672
5673 /* --------------------------------------------------------------------- */
5674
5675 static int __init thermal_init(struct ibm_init_struct *iibm)
5676 {
5677         u8 t, ta1, ta2;
5678         int i;
5679         int acpi_tmp7;
5680         int res;
5681
5682         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5683
5684         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5685
5686         if (thinkpad_id.ec_model) {
5687                 /*
5688                  * Direct EC access mode: sensors at registers
5689                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5690                  * non-implemented, thermal sensors return 0x80 when
5691                  * not available
5692                  */
5693
5694                 ta1 = ta2 = 0;
5695                 for (i = 0; i < 8; i++) {
5696                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5697                                 ta1 |= t;
5698                         } else {
5699                                 ta1 = 0;
5700                                 break;
5701                         }
5702                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5703                                 ta2 |= t;
5704                         } else {
5705                                 ta1 = 0;
5706                                 break;
5707                         }
5708                 }
5709                 if (ta1 == 0) {
5710                         /* This is sheer paranoia, but we handle it anyway */
5711                         if (acpi_tmp7) {
5712                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5713                                        "falling back to ACPI TMPx access "
5714                                        "mode\n");
5715                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5716                         } else {
5717                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5718                                        "disabling thermal sensors access\n");
5719                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5720                         }
5721                 } else {
5722                         thermal_read_mode =
5723                             (ta2 != 0) ?
5724                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5725                 }
5726         } else if (acpi_tmp7) {
5727                 if (tpacpi_is_ibm() &&
5728                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5729                         /* 600e/x, 770e, 770x */
5730                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5731                 } else {
5732                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5733                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5734                 }
5735         } else {
5736                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5737                 thermal_read_mode = TPACPI_THERMAL_NONE;
5738         }
5739
5740         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5741                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5742                 thermal_read_mode);
5743
5744         switch (thermal_read_mode) {
5745         case TPACPI_THERMAL_TPEC_16:
5746                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5747                                 &thermal_temp_input16_group);
5748                 if (res)
5749                         return res;
5750                 break;
5751         case TPACPI_THERMAL_TPEC_8:
5752         case TPACPI_THERMAL_ACPI_TMP07:
5753         case TPACPI_THERMAL_ACPI_UPDT:
5754                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5755                                 &thermal_temp_input8_group);
5756                 if (res)
5757                         return res;
5758                 break;
5759         case TPACPI_THERMAL_NONE:
5760         default:
5761                 return 1;
5762         }
5763
5764         return 0;
5765 }
5766
5767 static void thermal_exit(void)
5768 {
5769         switch (thermal_read_mode) {
5770         case TPACPI_THERMAL_TPEC_16:
5771                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5772                                    &thermal_temp_input16_group);
5773                 break;
5774         case TPACPI_THERMAL_TPEC_8:
5775         case TPACPI_THERMAL_ACPI_TMP07:
5776         case TPACPI_THERMAL_ACPI_UPDT:
5777                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5778                                    &thermal_temp_input8_group);
5779                 break;
5780         case TPACPI_THERMAL_NONE:
5781         default:
5782                 break;
5783         }
5784 }
5785
5786 static int thermal_read(struct seq_file *m)
5787 {
5788         int n, i;
5789         struct ibm_thermal_sensors_struct t;
5790
5791         n = thermal_get_sensors(&t);
5792         if (unlikely(n < 0))
5793                 return n;
5794
5795         seq_printf(m, "temperatures:\t");
5796
5797         if (n > 0) {
5798                 for (i = 0; i < (n - 1); i++)
5799                         seq_printf(m, "%d ", t.temp[i] / 1000);
5800                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5801         } else
5802                 seq_printf(m, "not supported\n");
5803
5804         return 0;
5805 }
5806
5807 static struct ibm_struct thermal_driver_data = {
5808         .name = "thermal",
5809         .read = thermal_read,
5810         .exit = thermal_exit,
5811 };
5812
5813 /*************************************************************************
5814  * Backlight/brightness subdriver
5815  */
5816
5817 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5818
5819 /*
5820  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5821  * CMOS NVRAM byte 0x5E, bits 0-3.
5822  *
5823  * EC HBRV (0x31) has the following layout
5824  *   Bit 7: unknown function
5825  *   Bit 6: unknown function
5826  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5827  *   Bit 4: must be set to zero to avoid problems
5828  *   Bit 3-0: backlight brightness level
5829  *
5830  * brightness_get_raw returns status data in the HBRV layout
5831  *
5832  * WARNING: The X61 has been verified to use HBRV for something else, so
5833  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5834  * testing on the very early *60 Lenovo models...
5835  */
5836
5837 enum {
5838         TP_EC_BACKLIGHT = 0x31,
5839
5840         /* TP_EC_BACKLIGHT bitmasks */
5841         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5842         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5843         TP_EC_BACKLIGHT_MAPSW = 0x20,
5844 };
5845
5846 enum tpacpi_brightness_access_mode {
5847         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5848         TPACPI_BRGHT_MODE_EC,           /* EC control */
5849         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5850         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5851         TPACPI_BRGHT_MODE_MAX
5852 };
5853
5854 static struct backlight_device *ibm_backlight_device;
5855
5856 static enum tpacpi_brightness_access_mode brightness_mode =
5857                 TPACPI_BRGHT_MODE_MAX;
5858
5859 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5860
5861 static struct mutex brightness_mutex;
5862
5863 /* NVRAM brightness access,
5864  * call with brightness_mutex held! */
5865 static unsigned int tpacpi_brightness_nvram_get(void)
5866 {
5867         u8 lnvram;
5868
5869         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5870                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5871                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5872         lnvram &= bright_maxlvl;
5873
5874         return lnvram;
5875 }
5876
5877 static void tpacpi_brightness_checkpoint_nvram(void)
5878 {
5879         u8 lec = 0;
5880         u8 b_nvram;
5881
5882         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5883                 return;
5884
5885         vdbg_printk(TPACPI_DBG_BRGHT,
5886                 "trying to checkpoint backlight level to NVRAM...\n");
5887
5888         if (mutex_lock_killable(&brightness_mutex) < 0)
5889                 return;
5890
5891         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5892                 goto unlock;
5893         lec &= TP_EC_BACKLIGHT_LVLMSK;
5894         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5895
5896         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5897                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5898                 /* NVRAM needs update */
5899                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5900                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5901                 b_nvram |= lec;
5902                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5903                 dbg_printk(TPACPI_DBG_BRGHT,
5904                            "updated NVRAM backlight level to %u (0x%02x)\n",
5905                            (unsigned int) lec, (unsigned int) b_nvram);
5906         } else
5907                 vdbg_printk(TPACPI_DBG_BRGHT,
5908                            "NVRAM backlight level already is %u (0x%02x)\n",
5909                            (unsigned int) lec, (unsigned int) b_nvram);
5910
5911 unlock:
5912         mutex_unlock(&brightness_mutex);
5913 }
5914
5915
5916 /* call with brightness_mutex held! */
5917 static int tpacpi_brightness_get_raw(int *status)
5918 {
5919         u8 lec = 0;
5920
5921         switch (brightness_mode) {
5922         case TPACPI_BRGHT_MODE_UCMS_STEP:
5923                 *status = tpacpi_brightness_nvram_get();
5924                 return 0;
5925         case TPACPI_BRGHT_MODE_EC:
5926         case TPACPI_BRGHT_MODE_ECNVRAM:
5927                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5928                         return -EIO;
5929                 *status = lec;
5930                 return 0;
5931         default:
5932                 return -ENXIO;
5933         }
5934 }
5935
5936 /* call with brightness_mutex held! */
5937 /* do NOT call with illegal backlight level value */
5938 static int tpacpi_brightness_set_ec(unsigned int value)
5939 {
5940         u8 lec = 0;
5941
5942         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5943                 return -EIO;
5944
5945         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5946                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5947                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5948                 return -EIO;
5949
5950         return 0;
5951 }
5952
5953 /* call with brightness_mutex held! */
5954 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5955 {
5956         int cmos_cmd, inc;
5957         unsigned int current_value, i;
5958
5959         current_value = tpacpi_brightness_nvram_get();
5960
5961         if (value == current_value)
5962                 return 0;
5963
5964         cmos_cmd = (value > current_value) ?
5965                         TP_CMOS_BRIGHTNESS_UP :
5966                         TP_CMOS_BRIGHTNESS_DOWN;
5967         inc = (value > current_value) ? 1 : -1;
5968
5969         for (i = current_value; i != value; i += inc)
5970                 if (issue_thinkpad_cmos_command(cmos_cmd))
5971                         return -EIO;
5972
5973         return 0;
5974 }
5975
5976 /* May return EINTR which can always be mapped to ERESTARTSYS */
5977 static int brightness_set(unsigned int value)
5978 {
5979         int res;
5980
5981         if (value > bright_maxlvl || value < 0)
5982                 return -EINVAL;
5983
5984         vdbg_printk(TPACPI_DBG_BRGHT,
5985                         "set backlight level to %d\n", value);
5986
5987         res = mutex_lock_killable(&brightness_mutex);
5988         if (res < 0)
5989                 return res;
5990
5991         switch (brightness_mode) {
5992         case TPACPI_BRGHT_MODE_EC:
5993         case TPACPI_BRGHT_MODE_ECNVRAM:
5994                 res = tpacpi_brightness_set_ec(value);
5995                 break;
5996         case TPACPI_BRGHT_MODE_UCMS_STEP:
5997                 res = tpacpi_brightness_set_ucmsstep(value);
5998                 break;
5999         default:
6000                 res = -ENXIO;
6001         }
6002
6003         mutex_unlock(&brightness_mutex);
6004         return res;
6005 }
6006
6007 /* sysfs backlight class ----------------------------------------------- */
6008
6009 static int brightness_update_status(struct backlight_device *bd)
6010 {
6011         unsigned int level =
6012                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6013                  bd->props.power == FB_BLANK_UNBLANK) ?
6014                                 bd->props.brightness : 0;
6015
6016         dbg_printk(TPACPI_DBG_BRGHT,
6017                         "backlight: attempt to set level to %d\n",
6018                         level);
6019
6020         /* it is the backlight class's job (caller) to handle
6021          * EINTR and other errors properly */
6022         return brightness_set(level);
6023 }
6024
6025 static int brightness_get(struct backlight_device *bd)
6026 {
6027         int status, res;
6028
6029         res = mutex_lock_killable(&brightness_mutex);
6030         if (res < 0)
6031                 return 0;
6032
6033         res = tpacpi_brightness_get_raw(&status);
6034
6035         mutex_unlock(&brightness_mutex);
6036
6037         if (res < 0)
6038                 return 0;
6039
6040         return status & TP_EC_BACKLIGHT_LVLMSK;
6041 }
6042
6043 static void tpacpi_brightness_notify_change(void)
6044 {
6045         backlight_force_update(ibm_backlight_device,
6046                                BACKLIGHT_UPDATE_HOTKEY);
6047 }
6048
6049 static const struct backlight_ops ibm_backlight_data = {
6050         .get_brightness = brightness_get,
6051         .update_status  = brightness_update_status,
6052 };
6053
6054 /* --------------------------------------------------------------------- */
6055
6056 /*
6057  * Call _BCL method of video device.  On some ThinkPads this will
6058  * switch the firmware to the ACPI brightness control mode.
6059  */
6060
6061 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6062 {
6063         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6064         union acpi_object *obj;
6065         int rc;
6066
6067         if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6068                 obj = (union acpi_object *)buffer.pointer;
6069                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6070                         pr_err("Unknown _BCL data, please report this to %s\n",
6071                                TPACPI_MAIL);
6072                         rc = 0;
6073                 } else {
6074                         rc = obj->package.count;
6075                 }
6076         } else {
6077                 return 0;
6078         }
6079
6080         kfree(buffer.pointer);
6081         return rc;
6082 }
6083
6084
6085 /*
6086  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6087  */
6088 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6089 {
6090         acpi_handle video_device;
6091         int bcl_levels = 0;
6092
6093         tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6094         if (video_device)
6095                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6096
6097         tp_features.bright_acpimode = (bcl_levels > 0);
6098
6099         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6100 }
6101
6102 /*
6103  * These are only useful for models that have only one possibility
6104  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6105  * these quirks.
6106  */
6107 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6108 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6109 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6110
6111 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6112         /* Models with ATI GPUs known to require ECNVRAM mode */
6113         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6114
6115         /* Models with ATI GPUs that can use ECNVRAM */
6116         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6117         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6118         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6119         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6120
6121         /* Models with Intel Extreme Graphics 2 */
6122         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6123         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6124         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6125
6126         /* Models with Intel GMA900 */
6127         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6128         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6129         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6130 };
6131
6132 /*
6133  * Returns < 0 for error, otherwise sets tp_features.bright_*
6134  * and bright_maxlvl.
6135  */
6136 static void __init tpacpi_detect_brightness_capabilities(void)
6137 {
6138         unsigned int b;
6139
6140         vdbg_printk(TPACPI_DBG_INIT,
6141                     "detecting firmware brightness interface capabilities\n");
6142
6143         /* we could run a quirks check here (same table used by
6144          * brightness_init) if needed */
6145
6146         /*
6147          * We always attempt to detect acpi support, so as to switch
6148          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6149          * going to publish a backlight interface
6150          */
6151         b = tpacpi_check_std_acpi_brightness_support();
6152         switch (b) {
6153         case 16:
6154                 bright_maxlvl = 15;
6155                 pr_info("detected a 16-level brightness capable ThinkPad\n");
6156                 break;
6157         case 8:
6158         case 0:
6159                 bright_maxlvl = 7;
6160                 pr_info("detected a 8-level brightness capable ThinkPad\n");
6161                 break;
6162         default:
6163                 pr_err("Unsupported brightness interface, "
6164                        "please contact %s\n", TPACPI_MAIL);
6165                 tp_features.bright_unkfw = 1;
6166                 bright_maxlvl = b - 1;
6167         }
6168 }
6169
6170 static int __init brightness_init(struct ibm_init_struct *iibm)
6171 {
6172         struct backlight_properties props;
6173         int b;
6174         unsigned long quirks;
6175
6176         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6177
6178         mutex_init(&brightness_mutex);
6179
6180         quirks = tpacpi_check_quirks(brightness_quirk_table,
6181                                 ARRAY_SIZE(brightness_quirk_table));
6182
6183         /* tpacpi_detect_brightness_capabilities() must have run already */
6184
6185         /* if it is unknown, we don't handle it: it wouldn't be safe */
6186         if (tp_features.bright_unkfw)
6187                 return 1;
6188
6189         if (!brightness_enable) {
6190                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6191                            "brightness support disabled by "
6192                            "module parameter\n");
6193                 return 1;
6194         }
6195
6196         if (acpi_video_backlight_support()) {
6197                 if (brightness_enable > 1) {
6198                         pr_info("Standard ACPI backlight interface "
6199                                 "available, not loading native one\n");
6200                         return 1;
6201                 } else if (brightness_enable == 1) {
6202                         pr_warn("Cannot enable backlight brightness support, "
6203                                 "ACPI is already handling it.  Refer to the "
6204                                 "acpi_backlight kernel parameter.\n");
6205                         return 1;
6206                 }
6207         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6208                 pr_notice("Standard ACPI backlight interface not "
6209                           "available, thinkpad_acpi native "
6210                           "brightness control enabled\n");
6211         }
6212
6213         /*
6214          * Check for module parameter bogosity, note that we
6215          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6216          * able to detect "unspecified"
6217          */
6218         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6219                 return -EINVAL;
6220
6221         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6222         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6223             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6224                 if (quirks & TPACPI_BRGHT_Q_EC)
6225                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6226                 else
6227                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6228
6229                 dbg_printk(TPACPI_DBG_BRGHT,
6230                            "driver auto-selected brightness_mode=%d\n",
6231                            brightness_mode);
6232         }
6233
6234         /* Safety */
6235         if (!tpacpi_is_ibm() &&
6236             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6237              brightness_mode == TPACPI_BRGHT_MODE_EC))
6238                 return -EINVAL;
6239
6240         if (tpacpi_brightness_get_raw(&b) < 0)
6241                 return 1;
6242
6243         memset(&props, 0, sizeof(struct backlight_properties));
6244         props.type = BACKLIGHT_PLATFORM;
6245         props.max_brightness = bright_maxlvl;
6246         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6247         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6248                                                          NULL, NULL,
6249                                                          &ibm_backlight_data,
6250                                                          &props);
6251         if (IS_ERR(ibm_backlight_device)) {
6252                 int rc = PTR_ERR(ibm_backlight_device);
6253                 ibm_backlight_device = NULL;
6254                 pr_err("Could not register backlight device\n");
6255                 return rc;
6256         }
6257         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6258                         "brightness is supported\n");
6259
6260         if (quirks & TPACPI_BRGHT_Q_ASK) {
6261                 pr_notice("brightness: will use unverified default: "
6262                           "brightness_mode=%d\n", brightness_mode);
6263                 pr_notice("brightness: please report to %s whether it works well "
6264                           "or not on your ThinkPad\n", TPACPI_MAIL);
6265         }
6266
6267         /* Added by mistake in early 2007.  Probably useless, but it could
6268          * be working around some unknown firmware problem where the value
6269          * read at startup doesn't match the real hardware state... so leave
6270          * it in place just in case */
6271         backlight_update_status(ibm_backlight_device);
6272
6273         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6274                         "brightness: registering brightness hotkeys "
6275                         "as change notification\n");
6276         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6277                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6278                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6279         return 0;
6280 }
6281
6282 static void brightness_suspend(pm_message_t state)
6283 {
6284         tpacpi_brightness_checkpoint_nvram();
6285 }
6286
6287 static void brightness_shutdown(void)
6288 {
6289         tpacpi_brightness_checkpoint_nvram();
6290 }
6291
6292 static void brightness_exit(void)
6293 {
6294         if (ibm_backlight_device) {
6295                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6296                             "calling backlight_device_unregister()\n");
6297                 backlight_device_unregister(ibm_backlight_device);
6298         }
6299
6300         tpacpi_brightness_checkpoint_nvram();
6301 }
6302
6303 static int brightness_read(struct seq_file *m)
6304 {
6305         int level;
6306
6307         level = brightness_get(NULL);
6308         if (level < 0) {
6309                 seq_printf(m, "level:\t\tunreadable\n");
6310         } else {
6311                 seq_printf(m, "level:\t\t%d\n", level);
6312                 seq_printf(m, "commands:\tup, down\n");
6313                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6314                                bright_maxlvl);
6315         }
6316
6317         return 0;
6318 }
6319
6320 static int brightness_write(char *buf)
6321 {
6322         int level;
6323         int rc;
6324         char *cmd;
6325
6326         level = brightness_get(NULL);
6327         if (level < 0)
6328                 return level;
6329
6330         while ((cmd = next_cmd(&buf))) {
6331                 if (strlencmp(cmd, "up") == 0) {
6332                         if (level < bright_maxlvl)
6333                                 level++;
6334                 } else if (strlencmp(cmd, "down") == 0) {
6335                         if (level > 0)
6336                                 level--;
6337                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6338                            level >= 0 && level <= bright_maxlvl) {
6339                         /* new level set */
6340                 } else
6341                         return -EINVAL;
6342         }
6343
6344         tpacpi_disclose_usertask("procfs brightness",
6345                         "set level to %d\n", level);
6346
6347         /*
6348          * Now we know what the final level should be, so we try to set it.
6349          * Doing it this way makes the syscall restartable in case of EINTR
6350          */
6351         rc = brightness_set(level);
6352         if (!rc && ibm_backlight_device)
6353                 backlight_force_update(ibm_backlight_device,
6354                                         BACKLIGHT_UPDATE_SYSFS);
6355         return (rc == -EINTR)? -ERESTARTSYS : rc;
6356 }
6357
6358 static struct ibm_struct brightness_driver_data = {
6359         .name = "brightness",
6360         .read = brightness_read,
6361         .write = brightness_write,
6362         .exit = brightness_exit,
6363         .suspend = brightness_suspend,
6364         .shutdown = brightness_shutdown,
6365 };
6366
6367 /*************************************************************************
6368  * Volume subdriver
6369  */
6370
6371 /*
6372  * IBM ThinkPads have a simple volume controller with MUTE gating.
6373  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6374  *
6375  * Since the *61 series (and probably also the later *60 series), Lenovo
6376  * ThinkPads only implement the MUTE gate.
6377  *
6378  * EC register 0x30
6379  *   Bit 6: MUTE (1 mutes sound)
6380  *   Bit 3-0: Volume
6381  *   Other bits should be zero as far as we know.
6382  *
6383  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6384  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6385  * such as bit 7 which is used to detect repeated presses of MUTE,
6386  * and we leave them unchanged.
6387  */
6388
6389 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6390
6391 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
6392 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6393 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6394
6395 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6396 static char *alsa_id = "ThinkPadEC";
6397 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6398
6399 struct tpacpi_alsa_data {
6400         struct snd_card *card;
6401         struct snd_ctl_elem_id *ctl_mute_id;
6402         struct snd_ctl_elem_id *ctl_vol_id;
6403 };
6404
6405 static struct snd_card *alsa_card;
6406
6407 enum {
6408         TP_EC_AUDIO = 0x30,
6409
6410         /* TP_EC_AUDIO bits */
6411         TP_EC_AUDIO_MUTESW = 6,
6412
6413         /* TP_EC_AUDIO bitmasks */
6414         TP_EC_AUDIO_LVL_MSK = 0x0F,
6415         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6416
6417         /* Maximum volume */
6418         TP_EC_VOLUME_MAX = 14,
6419 };
6420
6421 enum tpacpi_volume_access_mode {
6422         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6423         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6424         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6425         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6426         TPACPI_VOL_MODE_MAX
6427 };
6428
6429 enum tpacpi_volume_capabilities {
6430         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6431         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6432         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6433         TPACPI_VOL_CAP_MAX
6434 };
6435
6436 static enum tpacpi_volume_access_mode volume_mode =
6437         TPACPI_VOL_MODE_MAX;
6438
6439 static enum tpacpi_volume_capabilities volume_capabilities;
6440 static int volume_control_allowed;
6441
6442 /*
6443  * Used to syncronize writers to TP_EC_AUDIO and
6444  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6445  */
6446 static struct mutex volume_mutex;
6447
6448 static void tpacpi_volume_checkpoint_nvram(void)
6449 {
6450         u8 lec = 0;
6451         u8 b_nvram;
6452         u8 ec_mask;
6453
6454         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6455                 return;
6456         if (!volume_control_allowed)
6457                 return;
6458
6459         vdbg_printk(TPACPI_DBG_MIXER,
6460                 "trying to checkpoint mixer state to NVRAM...\n");
6461
6462         if (tp_features.mixer_no_level_control)
6463                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6464         else
6465                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6466
6467         if (mutex_lock_killable(&volume_mutex) < 0)
6468                 return;
6469
6470         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6471                 goto unlock;
6472         lec &= ec_mask;
6473         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6474
6475         if (lec != (b_nvram & ec_mask)) {
6476                 /* NVRAM needs update */
6477                 b_nvram &= ~ec_mask;
6478                 b_nvram |= lec;
6479                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6480                 dbg_printk(TPACPI_DBG_MIXER,
6481                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6482                            (unsigned int) lec, (unsigned int) b_nvram);
6483         } else {
6484                 vdbg_printk(TPACPI_DBG_MIXER,
6485                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6486                            (unsigned int) lec, (unsigned int) b_nvram);
6487         }
6488
6489 unlock:
6490         mutex_unlock(&volume_mutex);
6491 }
6492
6493 static int volume_get_status_ec(u8 *status)
6494 {
6495         u8 s;
6496
6497         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6498                 return -EIO;
6499
6500         *status = s;
6501
6502         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6503
6504         return 0;
6505 }
6506
6507 static int volume_get_status(u8 *status)
6508 {
6509         return volume_get_status_ec(status);
6510 }
6511
6512 static int volume_set_status_ec(const u8 status)
6513 {
6514         if (!acpi_ec_write(TP_EC_AUDIO, status))
6515                 return -EIO;
6516
6517         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6518
6519         return 0;
6520 }
6521
6522 static int volume_set_status(const u8 status)
6523 {
6524         return volume_set_status_ec(status);
6525 }
6526
6527 /* returns < 0 on error, 0 on no change, 1 on change */
6528 static int __volume_set_mute_ec(const bool mute)
6529 {
6530         int rc;
6531         u8 s, n;
6532
6533         if (mutex_lock_killable(&volume_mutex) < 0)
6534                 return -EINTR;
6535
6536         rc = volume_get_status_ec(&s);
6537         if (rc)
6538                 goto unlock;
6539
6540         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6541                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6542
6543         if (n != s) {
6544                 rc = volume_set_status_ec(n);
6545                 if (!rc)
6546                         rc = 1;
6547         }
6548
6549 unlock:
6550         mutex_unlock(&volume_mutex);
6551         return rc;
6552 }
6553
6554 static int volume_alsa_set_mute(const bool mute)
6555 {
6556         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6557                    (mute) ? "" : "un");
6558         return __volume_set_mute_ec(mute);
6559 }
6560
6561 static int volume_set_mute(const bool mute)
6562 {
6563         int rc;
6564
6565         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6566                    (mute) ? "" : "un");
6567
6568         rc = __volume_set_mute_ec(mute);
6569         return (rc < 0) ? rc : 0;
6570 }
6571
6572 /* returns < 0 on error, 0 on no change, 1 on change */
6573 static int __volume_set_volume_ec(const u8 vol)
6574 {
6575         int rc;
6576         u8 s, n;
6577
6578         if (vol > TP_EC_VOLUME_MAX)
6579                 return -EINVAL;
6580
6581         if (mutex_lock_killable(&volume_mutex) < 0)
6582                 return -EINTR;
6583
6584         rc = volume_get_status_ec(&s);
6585         if (rc)
6586                 goto unlock;
6587
6588         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6589
6590         if (n != s) {
6591                 rc = volume_set_status_ec(n);
6592                 if (!rc)
6593                         rc = 1;
6594         }
6595
6596 unlock:
6597         mutex_unlock(&volume_mutex);
6598         return rc;
6599 }
6600
6601 static int volume_alsa_set_volume(const u8 vol)
6602 {
6603         dbg_printk(TPACPI_DBG_MIXER,
6604                    "ALSA: trying to set volume level to %hu\n", vol);
6605         return __volume_set_volume_ec(vol);
6606 }
6607
6608 static void volume_alsa_notify_change(void)
6609 {
6610         struct tpacpi_alsa_data *d;
6611
6612         if (alsa_card && alsa_card->private_data) {
6613                 d = alsa_card->private_data;
6614                 if (d->ctl_mute_id)
6615                         snd_ctl_notify(alsa_card,
6616                                         SNDRV_CTL_EVENT_MASK_VALUE,
6617                                         d->ctl_mute_id);
6618                 if (d->ctl_vol_id)
6619                         snd_ctl_notify(alsa_card,
6620                                         SNDRV_CTL_EVENT_MASK_VALUE,
6621                                         d->ctl_vol_id);
6622         }
6623 }
6624
6625 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6626                                 struct snd_ctl_elem_info *uinfo)
6627 {
6628         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6629         uinfo->count = 1;
6630         uinfo->value.integer.min = 0;
6631         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6632         return 0;
6633 }
6634
6635 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6636                                 struct snd_ctl_elem_value *ucontrol)
6637 {
6638         u8 s;
6639         int rc;
6640
6641         rc = volume_get_status(&s);
6642         if (rc < 0)
6643                 return rc;
6644
6645         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6646         return 0;
6647 }
6648
6649 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6650                                 struct snd_ctl_elem_value *ucontrol)
6651 {
6652         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6653                                  ucontrol->value.integer.value[0]);
6654         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6655 }
6656
6657 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6658
6659 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6660                                 struct snd_ctl_elem_value *ucontrol)
6661 {
6662         u8 s;
6663         int rc;
6664
6665         rc = volume_get_status(&s);
6666         if (rc < 0)
6667                 return rc;
6668
6669         ucontrol->value.integer.value[0] =
6670                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6671         return 0;
6672 }
6673
6674 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6675                                 struct snd_ctl_elem_value *ucontrol)
6676 {
6677         tpacpi_disclose_usertask("ALSA", "%smute\n",
6678                                  ucontrol->value.integer.value[0] ?
6679                                         "un" : "");
6680         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6681 }
6682
6683 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6684         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6685         .name = "Console Playback Volume",
6686         .index = 0,
6687         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6688         .info = volume_alsa_vol_info,
6689         .get = volume_alsa_vol_get,
6690 };
6691
6692 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6693         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6694         .name = "Console Playback Switch",
6695         .index = 0,
6696         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6697         .info = volume_alsa_mute_info,
6698         .get = volume_alsa_mute_get,
6699 };
6700
6701 static void volume_suspend(pm_message_t state)
6702 {
6703         tpacpi_volume_checkpoint_nvram();
6704 }
6705
6706 static void volume_resume(void)
6707 {
6708         volume_alsa_notify_change();
6709 }
6710
6711 static void volume_shutdown(void)
6712 {
6713         tpacpi_volume_checkpoint_nvram();
6714 }
6715
6716 static void volume_exit(void)
6717 {
6718         if (alsa_card) {
6719                 snd_card_free(alsa_card);
6720                 alsa_card = NULL;
6721         }
6722
6723         tpacpi_volume_checkpoint_nvram();
6724 }
6725
6726 static int __init volume_create_alsa_mixer(void)
6727 {
6728         struct snd_card *card;
6729         struct tpacpi_alsa_data *data;
6730         struct snd_kcontrol *ctl_vol;
6731         struct snd_kcontrol *ctl_mute;
6732         int rc;
6733
6734         rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6735                             sizeof(struct tpacpi_alsa_data), &card);
6736         if (rc < 0 || !card) {
6737                 pr_err("Failed to create ALSA card structures: %d\n", rc);
6738                 return 1;
6739         }
6740
6741         BUG_ON(!card->private_data);
6742         data = card->private_data;
6743         data->card = card;
6744
6745         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6746                 sizeof(card->driver));
6747         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6748                 sizeof(card->shortname));
6749         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6750                  (thinkpad_id.ec_version_str) ?
6751                         thinkpad_id.ec_version_str : "(unknown)");
6752         snprintf(card->longname, sizeof(card->longname),
6753                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6754                  (thinkpad_id.ec_version_str) ?
6755                         thinkpad_id.ec_version_str : "unknown");
6756
6757         if (volume_control_allowed) {
6758                 volume_alsa_control_vol.put = volume_alsa_vol_put;
6759                 volume_alsa_control_vol.access =
6760                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6761
6762                 volume_alsa_control_mute.put = volume_alsa_mute_put;
6763                 volume_alsa_control_mute.access =
6764                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6765         }
6766
6767         if (!tp_features.mixer_no_level_control) {
6768                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6769                 rc = snd_ctl_add(card, ctl_vol);
6770                 if (rc < 0) {
6771                         pr_err("Failed to create ALSA volume control: %d\n",
6772                                rc);
6773                         goto err_exit;
6774                 }
6775                 data->ctl_vol_id = &ctl_vol->id;
6776         }
6777
6778         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6779         rc = snd_ctl_add(card, ctl_mute);
6780         if (rc < 0) {
6781                 pr_err("Failed to create ALSA mute control: %d\n", rc);
6782                 goto err_exit;
6783         }
6784         data->ctl_mute_id = &ctl_mute->id;
6785
6786         snd_card_set_dev(card, &tpacpi_pdev->dev);
6787         rc = snd_card_register(card);
6788         if (rc < 0) {
6789                 pr_err("Failed to register ALSA card: %d\n", rc);
6790                 goto err_exit;
6791         }
6792
6793         alsa_card = card;
6794         return 0;
6795
6796 err_exit:
6797         snd_card_free(card);
6798         return 1;
6799 }
6800
6801 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
6802 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
6803
6804 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6805         /* Whitelist volume level on all IBM by default */
6806         { .vendor = PCI_VENDOR_ID_IBM,
6807           .bios   = TPACPI_MATCH_ANY,
6808           .ec     = TPACPI_MATCH_ANY,
6809           .quirks = TPACPI_VOL_Q_LEVEL },
6810
6811         /* Lenovo models with volume control (needs confirmation) */
6812         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6813         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6814         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6815         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6816         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6817         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6818         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6819
6820         /* Whitelist mute-only on all Lenovo by default */
6821         { .vendor = PCI_VENDOR_ID_LENOVO,
6822           .bios   = TPACPI_MATCH_ANY,
6823           .ec     = TPACPI_MATCH_ANY,
6824           .quirks = TPACPI_VOL_Q_MUTEONLY }
6825 };
6826
6827 static int __init volume_init(struct ibm_init_struct *iibm)
6828 {
6829         unsigned long quirks;
6830         int rc;
6831
6832         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6833
6834         mutex_init(&volume_mutex);
6835
6836         /*
6837          * Check for module parameter bogosity, note that we
6838          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6839          * able to detect "unspecified"
6840          */
6841         if (volume_mode > TPACPI_VOL_MODE_MAX)
6842                 return -EINVAL;
6843
6844         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6845                 pr_err("UCMS step volume mode not implemented, "
6846                        "please contact %s\n", TPACPI_MAIL);
6847                 return 1;
6848         }
6849
6850         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6851                 return -EINVAL;
6852
6853         /*
6854          * The ALSA mixer is our primary interface.
6855          * When disabled, don't install the subdriver at all
6856          */
6857         if (!alsa_enable) {
6858                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6859                             "ALSA mixer disabled by parameter, "
6860                             "not loading volume subdriver...\n");
6861                 return 1;
6862         }
6863
6864         quirks = tpacpi_check_quirks(volume_quirk_table,
6865                                      ARRAY_SIZE(volume_quirk_table));
6866
6867         switch (volume_capabilities) {
6868         case TPACPI_VOL_CAP_AUTO:
6869                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6870                         tp_features.mixer_no_level_control = 1;
6871                 else if (quirks & TPACPI_VOL_Q_LEVEL)
6872                         tp_features.mixer_no_level_control = 0;
6873                 else
6874                         return 1; /* no mixer */
6875                 break;
6876         case TPACPI_VOL_CAP_VOLMUTE:
6877                 tp_features.mixer_no_level_control = 0;
6878                 break;
6879         case TPACPI_VOL_CAP_MUTEONLY:
6880                 tp_features.mixer_no_level_control = 1;
6881                 break;
6882         default:
6883                 return 1;
6884         }
6885
6886         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6887                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6888                                 "using user-supplied volume_capabilities=%d\n",
6889                                 volume_capabilities);
6890
6891         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6892             volume_mode == TPACPI_VOL_MODE_MAX) {
6893                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6894
6895                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6896                                 "driver auto-selected volume_mode=%d\n",
6897                                 volume_mode);
6898         } else {
6899                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6900                                 "using user-supplied volume_mode=%d\n",
6901                                 volume_mode);
6902         }
6903
6904         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6905                         "mute is supported, volume control is %s\n",
6906                         str_supported(!tp_features.mixer_no_level_control));
6907
6908         rc = volume_create_alsa_mixer();
6909         if (rc) {
6910                 pr_err("Could not create the ALSA mixer interface\n");
6911                 return rc;
6912         }
6913
6914         pr_info("Console audio control enabled, mode: %s\n",
6915                 (volume_control_allowed) ?
6916                         "override (read/write)" :
6917                         "monitor (read only)");
6918
6919         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6920                 "registering volume hotkeys as change notification\n");
6921         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6922                         | TP_ACPI_HKEY_VOLUP_MASK
6923                         | TP_ACPI_HKEY_VOLDWN_MASK
6924                         | TP_ACPI_HKEY_MUTE_MASK);
6925
6926         return 0;
6927 }
6928
6929 static int volume_read(struct seq_file *m)
6930 {
6931         u8 status;
6932
6933         if (volume_get_status(&status) < 0) {
6934                 seq_printf(m, "level:\t\tunreadable\n");
6935         } else {
6936                 if (tp_features.mixer_no_level_control)
6937                         seq_printf(m, "level:\t\tunsupported\n");
6938                 else
6939                         seq_printf(m, "level:\t\t%d\n",
6940                                         status & TP_EC_AUDIO_LVL_MSK);
6941
6942                 seq_printf(m, "mute:\t\t%s\n",
6943                                 onoff(status, TP_EC_AUDIO_MUTESW));
6944
6945                 if (volume_control_allowed) {
6946                         seq_printf(m, "commands:\tunmute, mute\n");
6947                         if (!tp_features.mixer_no_level_control) {
6948                                 seq_printf(m,
6949                                                "commands:\tup, down\n");
6950                                 seq_printf(m,
6951                                                "commands:\tlevel <level>"
6952                                                " (<level> is 0-%d)\n",
6953                                                TP_EC_VOLUME_MAX);
6954                         }
6955                 }
6956         }
6957
6958         return 0;
6959 }
6960
6961 static int volume_write(char *buf)
6962 {
6963         u8 s;
6964         u8 new_level, new_mute;
6965         int l;
6966         char *cmd;
6967         int rc;
6968
6969         /*
6970          * We do allow volume control at driver startup, so that the
6971          * user can set initial state through the volume=... parameter hack.
6972          */
6973         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6974                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6975                         tp_warned.volume_ctrl_forbidden = 1;
6976                         pr_notice("Console audio control in monitor mode, "
6977                                   "changes are not allowed\n");
6978                         pr_notice("Use the volume_control=1 module parameter "
6979                                   "to enable volume control\n");
6980                 }
6981                 return -EPERM;
6982         }
6983
6984         rc = volume_get_status(&s);
6985         if (rc < 0)
6986                 return rc;
6987
6988         new_level = s & TP_EC_AUDIO_LVL_MSK;
6989         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
6990
6991         while ((cmd = next_cmd(&buf))) {
6992                 if (!tp_features.mixer_no_level_control) {
6993                         if (strlencmp(cmd, "up") == 0) {
6994                                 if (new_mute)
6995                                         new_mute = 0;
6996                                 else if (new_level < TP_EC_VOLUME_MAX)
6997                                         new_level++;
6998                                 continue;
6999                         } else if (strlencmp(cmd, "down") == 0) {
7000                                 if (new_mute)
7001                                         new_mute = 0;
7002                                 else if (new_level > 0)
7003                                         new_level--;
7004                                 continue;
7005                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7006                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7007                                         new_level = l;
7008                                 continue;
7009                         }
7010                 }
7011                 if (strlencmp(cmd, "mute") == 0)
7012                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7013                 else if (strlencmp(cmd, "unmute") == 0)
7014                         new_mute = 0;
7015                 else
7016                         return -EINVAL;
7017         }
7018
7019         if (tp_features.mixer_no_level_control) {
7020                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7021                                         new_mute ? "" : "un");
7022                 rc = volume_set_mute(!!new_mute);
7023         } else {
7024                 tpacpi_disclose_usertask("procfs volume",
7025                                         "%smute and set level to %d\n",
7026                                         new_mute ? "" : "un", new_level);
7027                 rc = volume_set_status(new_mute | new_level);
7028         }
7029         volume_alsa_notify_change();
7030
7031         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7032 }
7033
7034 static struct ibm_struct volume_driver_data = {
7035         .name = "volume",
7036         .read = volume_read,
7037         .write = volume_write,
7038         .exit = volume_exit,
7039         .suspend = volume_suspend,
7040         .resume = volume_resume,
7041         .shutdown = volume_shutdown,
7042 };
7043
7044 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7045
7046 #define alsa_card NULL
7047
7048 static void inline volume_alsa_notify_change(void)
7049 {
7050 }
7051
7052 static int __init volume_init(struct ibm_init_struct *iibm)
7053 {
7054         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7055
7056         return 1;
7057 }
7058
7059 static struct ibm_struct volume_driver_data = {
7060         .name = "volume",
7061 };
7062
7063 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7064
7065 /*************************************************************************
7066  * Fan subdriver
7067  */
7068
7069 /*
7070  * FAN ACCESS MODES
7071  *
7072  * TPACPI_FAN_RD_ACPI_GFAN:
7073  *      ACPI GFAN method: returns fan level
7074  *
7075  *      see TPACPI_FAN_WR_ACPI_SFAN
7076  *      EC 0x2f (HFSP) not available if GFAN exists
7077  *
7078  * TPACPI_FAN_WR_ACPI_SFAN:
7079  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7080  *
7081  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7082  *      it for writing.
7083  *
7084  * TPACPI_FAN_WR_TPEC:
7085  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7086  *      Supported on almost all ThinkPads
7087  *
7088  *      Fan speed changes of any sort (including those caused by the
7089  *      disengaged mode) are usually done slowly by the firmware as the
7090  *      maximum amount of fan duty cycle change per second seems to be
7091  *      limited.
7092  *
7093  *      Reading is not available if GFAN exists.
7094  *      Writing is not available if SFAN exists.
7095  *
7096  *      Bits
7097  *       7      automatic mode engaged;
7098  *              (default operation mode of the ThinkPad)
7099  *              fan level is ignored in this mode.
7100  *       6      full speed mode (takes precedence over bit 7);
7101  *              not available on all thinkpads.  May disable
7102  *              the tachometer while the fan controller ramps up
7103  *              the speed (which can take up to a few *minutes*).
7104  *              Speeds up fan to 100% duty-cycle, which is far above
7105  *              the standard RPM levels.  It is not impossible that
7106  *              it could cause hardware damage.
7107  *      5-3     unused in some models.  Extra bits for fan level
7108  *              in others, but still useless as all values above
7109  *              7 map to the same speed as level 7 in these models.
7110  *      2-0     fan level (0..7 usually)
7111  *                      0x00 = stop
7112  *                      0x07 = max (set when temperatures critical)
7113  *              Some ThinkPads may have other levels, see
7114  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7115  *
7116  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7117  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7118  *      does so, its initial value is meaningless (0x07).
7119  *
7120  *      For firmware bugs, refer to:
7121  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7122  *
7123  *      ----
7124  *
7125  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7126  *      Main fan tachometer reading (in RPM)
7127  *
7128  *      This register is present on all ThinkPads with a new-style EC, and
7129  *      it is known not to be present on the A21m/e, and T22, as there is
7130  *      something else in offset 0x84 according to the ACPI DSDT.  Other
7131  *      ThinkPads from this same time period (and earlier) probably lack the
7132  *      tachometer as well.
7133  *
7134  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7135  *      was never fixed by IBM to report the EC firmware version string
7136  *      probably support the tachometer (like the early X models), so
7137  *      detecting it is quite hard.  We need more data to know for sure.
7138  *
7139  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7140  *      might result.
7141  *
7142  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
7143  *      mode.
7144  *
7145  *      For firmware bugs, refer to:
7146  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7147  *
7148  *      ----
7149  *
7150  *      ThinkPad EC register 0x31 bit 0 (only on select models)
7151  *
7152  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
7153  *      show the speed of the main fan.  When bit 0 of EC register 0x31
7154  *      is one, the tachometer registers show the speed of the auxiliary
7155  *      fan.
7156  *
7157  *      Fan control seems to affect both fans, regardless of the state
7158  *      of this bit.
7159  *
7160  *      So far, only the firmware for the X60/X61 non-tablet versions
7161  *      seem to support this (firmware TP-7M).
7162  *
7163  * TPACPI_FAN_WR_ACPI_FANS:
7164  *      ThinkPad X31, X40, X41.  Not available in the X60.
7165  *
7166  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
7167  *      high speed.  ACPI DSDT seems to map these three speeds to levels
7168  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7169  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7170  *
7171  *      The speeds are stored on handles
7172  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7173  *
7174  *      There are three default speed sets, accessible as handles:
7175  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7176  *
7177  *      ACPI DSDT switches which set is in use depending on various
7178  *      factors.
7179  *
7180  *      TPACPI_FAN_WR_TPEC is also available and should be used to
7181  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7182  *      but the ACPI tables just mention level 7.
7183  */
7184
7185 enum {                                  /* Fan control constants */
7186         fan_status_offset = 0x2f,       /* EC register 0x2f */
7187         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
7188                                          * 0x84 must be read before 0x85 */
7189         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
7190                                            bit 0 selects which fan is active */
7191
7192         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
7193         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
7194
7195         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
7196 };
7197
7198 enum fan_status_access_mode {
7199         TPACPI_FAN_NONE = 0,            /* No fan status or control */
7200         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
7201         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7202 };
7203
7204 enum fan_control_access_mode {
7205         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
7206         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
7207         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
7208         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
7209 };
7210
7211 enum fan_control_commands {
7212         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
7213         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
7214         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
7215                                                  * and also watchdog cmd */
7216 };
7217
7218 static int fan_control_allowed;
7219
7220 static enum fan_status_access_mode fan_status_access_mode;
7221 static enum fan_control_access_mode fan_control_access_mode;
7222 static enum fan_control_commands fan_control_commands;
7223
7224 static u8 fan_control_initial_status;
7225 static u8 fan_control_desired_level;
7226 static u8 fan_control_resume_level;
7227 static int fan_watchdog_maxinterval;
7228
7229 static struct mutex fan_mutex;
7230
7231 static void fan_watchdog_fire(struct work_struct *ignored);
7232 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7233
7234 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
7235 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7236            "\\FSPD",            /* 600e/x, 770e, 770x */
7237            );                   /* all others */
7238 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7239            "JFNS",              /* 770x-JL */
7240            );                   /* all others */
7241
7242 /*
7243  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7244  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7245  * be in auto mode (0x80).
7246  *
7247  * This is corrected by any write to HFSP either by the driver, or
7248  * by the firmware.
7249  *
7250  * We assume 0x07 really means auto mode while this quirk is active,
7251  * as this is far more likely than the ThinkPad being in level 7,
7252  * which is only used by the firmware during thermal emergencies.
7253  *
7254  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7255  * TP-70 (T43, R52), which are known to be buggy.
7256  */
7257
7258 static void fan_quirk1_setup(void)
7259 {
7260         if (fan_control_initial_status == 0x07) {
7261                 pr_notice("fan_init: initial fan status is unknown, "
7262                           "assuming it is in auto mode\n");
7263                 tp_features.fan_ctrl_status_undef = 1;
7264         }
7265 }
7266
7267 static void fan_quirk1_handle(u8 *fan_status)
7268 {
7269         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7270                 if (*fan_status != fan_control_initial_status) {
7271                         /* something changed the HFSP regisnter since
7272                          * driver init time, so it is not undefined
7273                          * anymore */
7274                         tp_features.fan_ctrl_status_undef = 0;
7275                 } else {
7276                         /* Return most likely status. In fact, it
7277                          * might be the only possible status */
7278                         *fan_status = TP_EC_FAN_AUTO;
7279                 }
7280         }
7281 }
7282
7283 /* Select main fan on X60/X61, NOOP on others */
7284 static bool fan_select_fan1(void)
7285 {
7286         if (tp_features.second_fan) {
7287                 u8 val;
7288
7289                 if (ec_read(fan_select_offset, &val) < 0)
7290                         return false;
7291                 val &= 0xFEU;
7292                 if (ec_write(fan_select_offset, val) < 0)
7293                         return false;
7294         }
7295         return true;
7296 }
7297
7298 /* Select secondary fan on X60/X61 */
7299 static bool fan_select_fan2(void)
7300 {
7301         u8 val;
7302
7303         if (!tp_features.second_fan)
7304                 return false;
7305
7306         if (ec_read(fan_select_offset, &val) < 0)
7307                 return false;
7308         val |= 0x01U;
7309         if (ec_write(fan_select_offset, val) < 0)
7310                 return false;
7311
7312         return true;
7313 }
7314
7315 /*
7316  * Call with fan_mutex held
7317  */
7318 static void fan_update_desired_level(u8 status)
7319 {
7320         if ((status &
7321              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7322                 if (status > 7)
7323                         fan_control_desired_level = 7;
7324                 else
7325                         fan_control_desired_level = status;
7326         }
7327 }
7328
7329 static int fan_get_status(u8 *status)
7330 {
7331         u8 s;
7332
7333         /* TODO:
7334          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7335
7336         switch (fan_status_access_mode) {
7337         case TPACPI_FAN_RD_ACPI_GFAN:
7338                 /* 570, 600e/x, 770e, 770x */
7339
7340                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7341                         return -EIO;
7342
7343                 if (likely(status))
7344                         *status = s & 0x07;
7345
7346                 break;
7347
7348         case TPACPI_FAN_RD_TPEC:
7349                 /* all except 570, 600e/x, 770e, 770x */
7350                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7351                         return -EIO;
7352
7353                 if (likely(status)) {
7354                         *status = s;
7355                         fan_quirk1_handle(status);
7356                 }
7357
7358                 break;
7359
7360         default:
7361                 return -ENXIO;
7362         }
7363
7364         return 0;
7365 }
7366
7367 static int fan_get_status_safe(u8 *status)
7368 {
7369         int rc;
7370         u8 s;
7371
7372         if (mutex_lock_killable(&fan_mutex))
7373                 return -ERESTARTSYS;
7374         rc = fan_get_status(&s);
7375         if (!rc)
7376                 fan_update_desired_level(s);
7377         mutex_unlock(&fan_mutex);
7378
7379         if (status)
7380                 *status = s;
7381
7382         return rc;
7383 }
7384
7385 static int fan_get_speed(unsigned int *speed)
7386 {
7387         u8 hi, lo;
7388
7389         switch (fan_status_access_mode) {
7390         case TPACPI_FAN_RD_TPEC:
7391                 /* all except 570, 600e/x, 770e, 770x */
7392                 if (unlikely(!fan_select_fan1()))
7393                         return -EIO;
7394                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7395                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7396                         return -EIO;
7397
7398                 if (likely(speed))
7399                         *speed = (hi << 8) | lo;
7400
7401                 break;
7402
7403         default:
7404                 return -ENXIO;
7405         }
7406
7407         return 0;
7408 }
7409
7410 static int fan2_get_speed(unsigned int *speed)
7411 {
7412         u8 hi, lo;
7413         bool rc;
7414
7415         switch (fan_status_access_mode) {
7416         case TPACPI_FAN_RD_TPEC:
7417                 /* all except 570, 600e/x, 770e, 770x */
7418                 if (unlikely(!fan_select_fan2()))
7419                         return -EIO;
7420                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7421                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7422                 fan_select_fan1(); /* play it safe */
7423                 if (rc)
7424                         return -EIO;
7425
7426                 if (likely(speed))
7427                         *speed = (hi << 8) | lo;
7428
7429                 break;
7430
7431         default:
7432                 return -ENXIO;
7433         }
7434
7435         return 0;
7436 }
7437
7438 static int fan_set_level(int level)
7439 {
7440         if (!fan_control_allowed)
7441                 return -EPERM;
7442
7443         switch (fan_control_access_mode) {
7444         case TPACPI_FAN_WR_ACPI_SFAN:
7445                 if (level >= 0 && level <= 7) {
7446                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7447                                 return -EIO;
7448                 } else
7449                         return -EINVAL;
7450                 break;
7451
7452         case TPACPI_FAN_WR_ACPI_FANS:
7453         case TPACPI_FAN_WR_TPEC:
7454                 if (!(level & TP_EC_FAN_AUTO) &&
7455                     !(level & TP_EC_FAN_FULLSPEED) &&
7456                     ((level < 0) || (level > 7)))
7457                         return -EINVAL;
7458
7459                 /* safety net should the EC not support AUTO
7460                  * or FULLSPEED mode bits and just ignore them */
7461                 if (level & TP_EC_FAN_FULLSPEED)
7462                         level |= 7;     /* safety min speed 7 */
7463                 else if (level & TP_EC_FAN_AUTO)
7464                         level |= 4;     /* safety min speed 4 */
7465
7466                 if (!acpi_ec_write(fan_status_offset, level))
7467                         return -EIO;
7468                 else
7469                         tp_features.fan_ctrl_status_undef = 0;
7470                 break;
7471
7472         default:
7473                 return -ENXIO;
7474         }
7475
7476         vdbg_printk(TPACPI_DBG_FAN,
7477                 "fan control: set fan control register to 0x%02x\n", level);
7478         return 0;
7479 }
7480
7481 static int fan_set_level_safe(int level)
7482 {
7483         int rc;
7484
7485         if (!fan_control_allowed)
7486                 return -EPERM;
7487
7488         if (mutex_lock_killable(&fan_mutex))
7489                 return -ERESTARTSYS;
7490
7491         if (level == TPACPI_FAN_LAST_LEVEL)
7492                 level = fan_control_desired_level;
7493
7494         rc = fan_set_level(level);
7495         if (!rc)
7496                 fan_update_desired_level(level);
7497
7498         mutex_unlock(&fan_mutex);
7499         return rc;
7500 }
7501
7502 static int fan_set_enable(void)
7503 {
7504         u8 s;
7505         int rc;
7506
7507         if (!fan_control_allowed)
7508                 return -EPERM;
7509
7510         if (mutex_lock_killable(&fan_mutex))
7511                 return -ERESTARTSYS;
7512
7513         switch (fan_control_access_mode) {
7514         case TPACPI_FAN_WR_ACPI_FANS:
7515         case TPACPI_FAN_WR_TPEC:
7516                 rc = fan_get_status(&s);
7517                 if (rc < 0)
7518                         break;
7519
7520                 /* Don't go out of emergency fan mode */
7521                 if (s != 7) {
7522                         s &= 0x07;
7523                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7524                 }
7525
7526                 if (!acpi_ec_write(fan_status_offset, s))
7527                         rc = -EIO;
7528                 else {
7529                         tp_features.fan_ctrl_status_undef = 0;
7530                         rc = 0;
7531                 }
7532                 break;
7533
7534         case TPACPI_FAN_WR_ACPI_SFAN:
7535                 rc = fan_get_status(&s);
7536                 if (rc < 0)
7537                         break;
7538
7539                 s &= 0x07;
7540
7541                 /* Set fan to at least level 4 */
7542                 s |= 4;
7543
7544                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7545                         rc = -EIO;
7546                 else
7547                         rc = 0;
7548                 break;
7549
7550         default:
7551                 rc = -ENXIO;
7552         }
7553
7554         mutex_unlock(&fan_mutex);
7555
7556         if (!rc)
7557                 vdbg_printk(TPACPI_DBG_FAN,
7558                         "fan control: set fan control register to 0x%02x\n",
7559                         s);
7560         return rc;
7561 }
7562
7563 static int fan_set_disable(void)
7564 {
7565         int rc;
7566
7567         if (!fan_control_allowed)
7568                 return -EPERM;
7569
7570         if (mutex_lock_killable(&fan_mutex))
7571                 return -ERESTARTSYS;
7572
7573         rc = 0;
7574         switch (fan_control_access_mode) {
7575         case TPACPI_FAN_WR_ACPI_FANS:
7576         case TPACPI_FAN_WR_TPEC:
7577                 if (!acpi_ec_write(fan_status_offset, 0x00))
7578                         rc = -EIO;
7579                 else {
7580                         fan_control_desired_level = 0;
7581                         tp_features.fan_ctrl_status_undef = 0;
7582                 }
7583                 break;
7584
7585         case TPACPI_FAN_WR_ACPI_SFAN:
7586                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7587                         rc = -EIO;
7588                 else
7589                         fan_control_desired_level = 0;
7590                 break;
7591
7592         default:
7593                 rc = -ENXIO;
7594         }
7595
7596         if (!rc)
7597                 vdbg_printk(TPACPI_DBG_FAN,
7598                         "fan control: set fan control register to 0\n");
7599
7600         mutex_unlock(&fan_mutex);
7601         return rc;
7602 }
7603
7604 static int fan_set_speed(int speed)
7605 {
7606         int rc;
7607
7608         if (!fan_control_allowed)
7609                 return -EPERM;
7610
7611         if (mutex_lock_killable(&fan_mutex))
7612                 return -ERESTARTSYS;
7613
7614         rc = 0;
7615         switch (fan_control_access_mode) {
7616         case TPACPI_FAN_WR_ACPI_FANS:
7617                 if (speed >= 0 && speed <= 65535) {
7618                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7619                                         speed, speed, speed))
7620                                 rc = -EIO;
7621                 } else
7622                         rc = -EINVAL;
7623                 break;
7624
7625         default:
7626                 rc = -ENXIO;
7627         }
7628
7629         mutex_unlock(&fan_mutex);
7630         return rc;
7631 }
7632
7633 static void fan_watchdog_reset(void)
7634 {
7635         static int fan_watchdog_active;
7636
7637         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7638                 return;
7639
7640         if (fan_watchdog_active)
7641                 cancel_delayed_work(&fan_watchdog_task);
7642
7643         if (fan_watchdog_maxinterval > 0 &&
7644             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7645                 fan_watchdog_active = 1;
7646                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7647                                 msecs_to_jiffies(fan_watchdog_maxinterval
7648                                                  * 1000))) {
7649                         pr_err("failed to queue the fan watchdog, "
7650                                "watchdog will not trigger\n");
7651                 }
7652         } else
7653                 fan_watchdog_active = 0;
7654 }
7655
7656 static void fan_watchdog_fire(struct work_struct *ignored)
7657 {
7658         int rc;
7659
7660         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7661                 return;
7662
7663         pr_notice("fan watchdog: enabling fan\n");
7664         rc = fan_set_enable();
7665         if (rc < 0) {
7666                 pr_err("fan watchdog: error %d while enabling fan, "
7667                        "will try again later...\n", -rc);
7668                 /* reschedule for later */
7669                 fan_watchdog_reset();
7670         }
7671 }
7672
7673 /*
7674  * SYSFS fan layout: hwmon compatible (device)
7675  *
7676  * pwm*_enable:
7677  *      0: "disengaged" mode
7678  *      1: manual mode
7679  *      2: native EC "auto" mode (recommended, hardware default)
7680  *
7681  * pwm*: set speed in manual mode, ignored otherwise.
7682  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7683  *      interpolation.
7684  *
7685  * fan*_input: tachometer reading, RPM
7686  *
7687  *
7688  * SYSFS fan layout: extensions
7689  *
7690  * fan_watchdog (driver):
7691  *      fan watchdog interval in seconds, 0 disables (default), max 120
7692  */
7693
7694 /* sysfs fan pwm1_enable ----------------------------------------------- */
7695 static ssize_t fan_pwm1_enable_show(struct device *dev,
7696                                     struct device_attribute *attr,
7697                                     char *buf)
7698 {
7699         int res, mode;
7700         u8 status;
7701
7702         res = fan_get_status_safe(&status);
7703         if (res)
7704                 return res;
7705
7706         if (status & TP_EC_FAN_FULLSPEED) {
7707                 mode = 0;
7708         } else if (status & TP_EC_FAN_AUTO) {
7709                 mode = 2;
7710         } else
7711                 mode = 1;
7712
7713         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7714 }
7715
7716 static ssize_t fan_pwm1_enable_store(struct device *dev,
7717                                      struct device_attribute *attr,
7718                                      const char *buf, size_t count)
7719 {
7720         unsigned long t;
7721         int res, level;
7722
7723         if (parse_strtoul(buf, 2, &t))
7724                 return -EINVAL;
7725
7726         tpacpi_disclose_usertask("hwmon pwm1_enable",
7727                         "set fan mode to %lu\n", t);
7728
7729         switch (t) {
7730         case 0:
7731                 level = TP_EC_FAN_FULLSPEED;
7732                 break;
7733         case 1:
7734                 level = TPACPI_FAN_LAST_LEVEL;
7735                 break;
7736         case 2:
7737                 level = TP_EC_FAN_AUTO;
7738                 break;
7739         case 3:
7740                 /* reserved for software-controlled auto mode */
7741                 return -ENOSYS;
7742         default:
7743                 return -EINVAL;
7744         }
7745
7746         res = fan_set_level_safe(level);
7747         if (res == -ENXIO)
7748                 return -EINVAL;
7749         else if (res < 0)
7750                 return res;
7751
7752         fan_watchdog_reset();
7753
7754         return count;
7755 }
7756
7757 static struct device_attribute dev_attr_fan_pwm1_enable =
7758         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7759                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7760
7761 /* sysfs fan pwm1 ------------------------------------------------------ */
7762 static ssize_t fan_pwm1_show(struct device *dev,
7763                              struct device_attribute *attr,
7764                              char *buf)
7765 {
7766         int res;
7767         u8 status;
7768
7769         res = fan_get_status_safe(&status);
7770         if (res)
7771                 return res;
7772
7773         if ((status &
7774              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7775                 status = fan_control_desired_level;
7776
7777         if (status > 7)
7778                 status = 7;
7779
7780         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7781 }
7782
7783 static ssize_t fan_pwm1_store(struct device *dev,
7784                               struct device_attribute *attr,
7785                               const char *buf, size_t count)
7786 {
7787         unsigned long s;
7788         int rc;
7789         u8 status, newlevel;
7790
7791         if (parse_strtoul(buf, 255, &s))
7792                 return -EINVAL;
7793
7794         tpacpi_disclose_usertask("hwmon pwm1",
7795                         "set fan speed to %lu\n", s);
7796
7797         /* scale down from 0-255 to 0-7 */
7798         newlevel = (s >> 5) & 0x07;
7799
7800         if (mutex_lock_killable(&fan_mutex))
7801                 return -ERESTARTSYS;
7802
7803         rc = fan_get_status(&status);
7804         if (!rc && (status &
7805                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7806                 rc = fan_set_level(newlevel);
7807                 if (rc == -ENXIO)
7808                         rc = -EINVAL;
7809                 else if (!rc) {
7810                         fan_update_desired_level(newlevel);
7811                         fan_watchdog_reset();
7812                 }
7813         }
7814
7815         mutex_unlock(&fan_mutex);
7816         return (rc)? rc : count;
7817 }
7818
7819 static struct device_attribute dev_attr_fan_pwm1 =
7820         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7821                 fan_pwm1_show, fan_pwm1_store);
7822
7823 /* sysfs fan fan1_input ------------------------------------------------ */
7824 static ssize_t fan_fan1_input_show(struct device *dev,
7825                            struct device_attribute *attr,
7826                            char *buf)
7827 {
7828         int res;
7829         unsigned int speed;
7830
7831         res = fan_get_speed(&speed);
7832         if (res < 0)
7833                 return res;
7834
7835         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7836 }
7837
7838 static struct device_attribute dev_attr_fan_fan1_input =
7839         __ATTR(fan1_input, S_IRUGO,
7840                 fan_fan1_input_show, NULL);
7841
7842 /* sysfs fan fan2_input ------------------------------------------------ */
7843 static ssize_t fan_fan2_input_show(struct device *dev,
7844                            struct device_attribute *attr,
7845                            char *buf)
7846 {
7847         int res;
7848         unsigned int speed;
7849
7850         res = fan2_get_speed(&speed);
7851         if (res < 0)
7852                 return res;
7853
7854         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7855 }
7856
7857 static struct device_attribute dev_attr_fan_fan2_input =
7858         __ATTR(fan2_input, S_IRUGO,
7859                 fan_fan2_input_show, NULL);
7860
7861 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7862 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7863                                      char *buf)
7864 {
7865         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7866 }
7867
7868 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7869                                       const char *buf, size_t count)
7870 {
7871         unsigned long t;
7872
7873         if (parse_strtoul(buf, 120, &t))
7874                 return -EINVAL;
7875
7876         if (!fan_control_allowed)
7877                 return -EPERM;
7878
7879         fan_watchdog_maxinterval = t;
7880         fan_watchdog_reset();
7881
7882         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7883
7884         return count;
7885 }
7886
7887 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7888                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7889
7890 /* --------------------------------------------------------------------- */
7891 static struct attribute *fan_attributes[] = {
7892         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7893         &dev_attr_fan_fan1_input.attr,
7894         NULL, /* for fan2_input */
7895         NULL
7896 };
7897
7898 static const struct attribute_group fan_attr_group = {
7899         .attrs = fan_attributes,
7900 };
7901
7902 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7903 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7904
7905 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7906         { .vendor = PCI_VENDOR_ID_IBM,          \
7907           .bios = TPACPI_MATCH_ANY,             \
7908           .ec = TPID(__id1, __id2),             \
7909           .quirks = __quirks }
7910
7911 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7912         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7913           .bios = TPACPI_MATCH_ANY,             \
7914           .ec = TPID(__id1, __id2),             \
7915           .quirks = __quirks }
7916
7917 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7918         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7919         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7920         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7921         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7922         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7923 };
7924
7925 #undef TPACPI_FAN_QL
7926 #undef TPACPI_FAN_QI
7927
7928 static int __init fan_init(struct ibm_init_struct *iibm)
7929 {
7930         int rc;
7931         unsigned long quirks;
7932
7933         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7934                         "initializing fan subdriver\n");
7935
7936         mutex_init(&fan_mutex);
7937         fan_status_access_mode = TPACPI_FAN_NONE;
7938         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7939         fan_control_commands = 0;
7940         fan_watchdog_maxinterval = 0;
7941         tp_features.fan_ctrl_status_undef = 0;
7942         tp_features.second_fan = 0;
7943         fan_control_desired_level = 7;
7944
7945         if (tpacpi_is_ibm()) {
7946                 TPACPI_ACPIHANDLE_INIT(fans);
7947                 TPACPI_ACPIHANDLE_INIT(gfan);
7948                 TPACPI_ACPIHANDLE_INIT(sfan);
7949         }
7950
7951         quirks = tpacpi_check_quirks(fan_quirk_table,
7952                                      ARRAY_SIZE(fan_quirk_table));
7953
7954         if (gfan_handle) {
7955                 /* 570, 600e/x, 770e, 770x */
7956                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7957         } else {
7958                 /* all other ThinkPads: note that even old-style
7959                  * ThinkPad ECs supports the fan control register */
7960                 if (likely(acpi_ec_read(fan_status_offset,
7961                                         &fan_control_initial_status))) {
7962                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7963                         if (quirks & TPACPI_FAN_Q1)
7964                                 fan_quirk1_setup();
7965                         if (quirks & TPACPI_FAN_2FAN) {
7966                                 tp_features.second_fan = 1;
7967                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7968                                         "secondary fan support enabled\n");
7969                         }
7970                 } else {
7971                         pr_err("ThinkPad ACPI EC access misbehaving, "
7972                                "fan status and control unavailable\n");
7973                         return 1;
7974                 }
7975         }
7976
7977         if (sfan_handle) {
7978                 /* 570, 770x-JL */
7979                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7980                 fan_control_commands |=
7981                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7982         } else {
7983                 if (!gfan_handle) {
7984                         /* gfan without sfan means no fan control */
7985                         /* all other models implement TP EC 0x2f control */
7986
7987                         if (fans_handle) {
7988                                 /* X31, X40, X41 */
7989                                 fan_control_access_mode =
7990                                     TPACPI_FAN_WR_ACPI_FANS;
7991                                 fan_control_commands |=
7992                                     TPACPI_FAN_CMD_SPEED |
7993                                     TPACPI_FAN_CMD_LEVEL |
7994                                     TPACPI_FAN_CMD_ENABLE;
7995                         } else {
7996                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7997                                 fan_control_commands |=
7998                                     TPACPI_FAN_CMD_LEVEL |
7999                                     TPACPI_FAN_CMD_ENABLE;
8000                         }
8001                 }
8002         }
8003
8004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8005                 "fan is %s, modes %d, %d\n",
8006                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8007                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8008                 fan_status_access_mode, fan_control_access_mode);
8009
8010         /* fan control master switch */
8011         if (!fan_control_allowed) {
8012                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8013                 fan_control_commands = 0;
8014                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8015                            "fan control features disabled by parameter\n");
8016         }
8017
8018         /* update fan_control_desired_level */
8019         if (fan_status_access_mode != TPACPI_FAN_NONE)
8020                 fan_get_status_safe(NULL);
8021
8022         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8023             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8024                 if (tp_features.second_fan) {
8025                         /* attach second fan tachometer */
8026                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8027                                         &dev_attr_fan_fan2_input.attr;
8028                 }
8029                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8030                                          &fan_attr_group);
8031                 if (rc < 0)
8032                         return rc;
8033
8034                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8035                                         &driver_attr_fan_watchdog);
8036                 if (rc < 0) {
8037                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8038                                         &fan_attr_group);
8039                         return rc;
8040                 }
8041                 return 0;
8042         } else
8043                 return 1;
8044 }
8045
8046 static void fan_exit(void)
8047 {
8048         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8049                     "cancelling any pending fan watchdog tasks\n");
8050
8051         /* FIXME: can we really do this unconditionally? */
8052         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8053         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8054                            &driver_attr_fan_watchdog);
8055
8056         cancel_delayed_work(&fan_watchdog_task);
8057         flush_workqueue(tpacpi_wq);
8058 }
8059
8060 static void fan_suspend(pm_message_t state)
8061 {
8062         int rc;
8063
8064         if (!fan_control_allowed)
8065                 return;
8066
8067         /* Store fan status in cache */
8068         fan_control_resume_level = 0;
8069         rc = fan_get_status_safe(&fan_control_resume_level);
8070         if (rc < 0)
8071                 pr_notice("failed to read fan level for later "
8072                           "restore during resume: %d\n", rc);
8073
8074         /* if it is undefined, don't attempt to restore it.
8075          * KEEP THIS LAST */
8076         if (tp_features.fan_ctrl_status_undef)
8077                 fan_control_resume_level = 0;
8078 }
8079
8080 static void fan_resume(void)
8081 {
8082         u8 current_level = 7;
8083         bool do_set = false;
8084         int rc;
8085
8086         /* DSDT *always* updates status on resume */
8087         tp_features.fan_ctrl_status_undef = 0;
8088
8089         if (!fan_control_allowed ||
8090             !fan_control_resume_level ||
8091             (fan_get_status_safe(&current_level) < 0))
8092                 return;
8093
8094         switch (fan_control_access_mode) {
8095         case TPACPI_FAN_WR_ACPI_SFAN:
8096                 /* never decrease fan level */
8097                 do_set = (fan_control_resume_level > current_level);
8098                 break;
8099         case TPACPI_FAN_WR_ACPI_FANS:
8100         case TPACPI_FAN_WR_TPEC:
8101                 /* never decrease fan level, scale is:
8102                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8103                  *
8104                  * We expect the firmware to set either 7 or AUTO, but we
8105                  * handle FULLSPEED out of paranoia.
8106                  *
8107                  * So, we can safely only restore FULLSPEED or 7, anything
8108                  * else could slow the fan.  Restoring AUTO is useless, at
8109                  * best that's exactly what the DSDT already set (it is the
8110                  * slower it uses).
8111                  *
8112                  * Always keep in mind that the DSDT *will* have set the
8113                  * fans to what the vendor supposes is the best level.  We
8114                  * muck with it only to speed the fan up.
8115                  */
8116                 if (fan_control_resume_level != 7 &&
8117                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8118                         return;
8119                 else
8120                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8121                                  (current_level != fan_control_resume_level);
8122                 break;
8123         default:
8124                 return;
8125         }
8126         if (do_set) {
8127                 pr_notice("restoring fan level to 0x%02x\n",
8128                           fan_control_resume_level);
8129                 rc = fan_set_level_safe(fan_control_resume_level);
8130                 if (rc < 0)
8131                         pr_notice("failed to restore fan level: %d\n", rc);
8132         }
8133 }
8134
8135 static int fan_read(struct seq_file *m)
8136 {
8137         int rc;
8138         u8 status;
8139         unsigned int speed = 0;
8140
8141         switch (fan_status_access_mode) {
8142         case TPACPI_FAN_RD_ACPI_GFAN:
8143                 /* 570, 600e/x, 770e, 770x */
8144                 rc = fan_get_status_safe(&status);
8145                 if (rc < 0)
8146                         return rc;
8147
8148                 seq_printf(m, "status:\t\t%s\n"
8149                                "level:\t\t%d\n",
8150                                (status != 0) ? "enabled" : "disabled", status);
8151                 break;
8152
8153         case TPACPI_FAN_RD_TPEC:
8154                 /* all except 570, 600e/x, 770e, 770x */
8155                 rc = fan_get_status_safe(&status);
8156                 if (rc < 0)
8157                         return rc;
8158
8159                 seq_printf(m, "status:\t\t%s\n",
8160                                (status != 0) ? "enabled" : "disabled");
8161
8162                 rc = fan_get_speed(&speed);
8163                 if (rc < 0)
8164                         return rc;
8165
8166                 seq_printf(m, "speed:\t\t%d\n", speed);
8167
8168                 if (status & TP_EC_FAN_FULLSPEED)
8169                         /* Disengaged mode takes precedence */
8170                         seq_printf(m, "level:\t\tdisengaged\n");
8171                 else if (status & TP_EC_FAN_AUTO)
8172                         seq_printf(m, "level:\t\tauto\n");
8173                 else
8174                         seq_printf(m, "level:\t\t%d\n", status);
8175                 break;
8176
8177         case TPACPI_FAN_NONE:
8178         default:
8179                 seq_printf(m, "status:\t\tnot supported\n");
8180         }
8181
8182         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8183                 seq_printf(m, "commands:\tlevel <level>");
8184
8185                 switch (fan_control_access_mode) {
8186                 case TPACPI_FAN_WR_ACPI_SFAN:
8187                         seq_printf(m, " (<level> is 0-7)\n");
8188                         break;
8189
8190                 default:
8191                         seq_printf(m, " (<level> is 0-7, "
8192                                        "auto, disengaged, full-speed)\n");
8193                         break;
8194                 }
8195         }
8196
8197         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8198                 seq_printf(m, "commands:\tenable, disable\n"
8199                                "commands:\twatchdog <timeout> (<timeout> "
8200                                "is 0 (off), 1-120 (seconds))\n");
8201
8202         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8203                 seq_printf(m, "commands:\tspeed <speed>"
8204                                " (<speed> is 0-65535)\n");
8205
8206         return 0;
8207 }
8208
8209 static int fan_write_cmd_level(const char *cmd, int *rc)
8210 {
8211         int level;
8212
8213         if (strlencmp(cmd, "level auto") == 0)
8214                 level = TP_EC_FAN_AUTO;
8215         else if ((strlencmp(cmd, "level disengaged") == 0) |
8216                         (strlencmp(cmd, "level full-speed") == 0))
8217                 level = TP_EC_FAN_FULLSPEED;
8218         else if (sscanf(cmd, "level %d", &level) != 1)
8219                 return 0;
8220
8221         *rc = fan_set_level_safe(level);
8222         if (*rc == -ENXIO)
8223                 pr_err("level command accepted for unsupported access mode %d\n",
8224                        fan_control_access_mode);
8225         else if (!*rc)
8226                 tpacpi_disclose_usertask("procfs fan",
8227                         "set level to %d\n", level);
8228
8229         return 1;
8230 }
8231
8232 static int fan_write_cmd_enable(const char *cmd, int *rc)
8233 {
8234         if (strlencmp(cmd, "enable") != 0)
8235                 return 0;
8236
8237         *rc = fan_set_enable();
8238         if (*rc == -ENXIO)
8239                 pr_err("enable command accepted for unsupported access mode %d\n",
8240                        fan_control_access_mode);
8241         else if (!*rc)
8242                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8243
8244         return 1;
8245 }
8246
8247 static int fan_write_cmd_disable(const char *cmd, int *rc)
8248 {
8249         if (strlencmp(cmd, "disable") != 0)
8250                 return 0;
8251
8252         *rc = fan_set_disable();
8253         if (*rc == -ENXIO)
8254                 pr_err("disable command accepted for unsupported access mode %d\n",
8255                        fan_control_access_mode);
8256         else if (!*rc)
8257                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8258
8259         return 1;
8260 }
8261
8262 static int fan_write_cmd_speed(const char *cmd, int *rc)
8263 {
8264         int speed;
8265
8266         /* TODO:
8267          * Support speed <low> <medium> <high> ? */
8268
8269         if (sscanf(cmd, "speed %d", &speed) != 1)
8270                 return 0;
8271
8272         *rc = fan_set_speed(speed);
8273         if (*rc == -ENXIO)
8274                 pr_err("speed command accepted for unsupported access mode %d\n",
8275                        fan_control_access_mode);
8276         else if (!*rc)
8277                 tpacpi_disclose_usertask("procfs fan",
8278                         "set speed to %d\n", speed);
8279
8280         return 1;
8281 }
8282
8283 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8284 {
8285         int interval;
8286
8287         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8288                 return 0;
8289
8290         if (interval < 0 || interval > 120)
8291                 *rc = -EINVAL;
8292         else {
8293                 fan_watchdog_maxinterval = interval;
8294                 tpacpi_disclose_usertask("procfs fan",
8295                         "set watchdog timer to %d\n",
8296                         interval);
8297         }
8298
8299         return 1;
8300 }
8301
8302 static int fan_write(char *buf)
8303 {
8304         char *cmd;
8305         int rc = 0;
8306
8307         while (!rc && (cmd = next_cmd(&buf))) {
8308                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8309                       fan_write_cmd_level(cmd, &rc)) &&
8310                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8311                       (fan_write_cmd_enable(cmd, &rc) ||
8312                        fan_write_cmd_disable(cmd, &rc) ||
8313                        fan_write_cmd_watchdog(cmd, &rc))) &&
8314                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8315                       fan_write_cmd_speed(cmd, &rc))
8316                     )
8317                         rc = -EINVAL;
8318                 else if (!rc)
8319                         fan_watchdog_reset();
8320         }
8321
8322         return rc;
8323 }
8324
8325 static struct ibm_struct fan_driver_data = {
8326         .name = "fan",
8327         .read = fan_read,
8328         .write = fan_write,
8329         .exit = fan_exit,
8330         .suspend = fan_suspend,
8331         .resume = fan_resume,
8332 };
8333
8334 /****************************************************************************
8335  ****************************************************************************
8336  *
8337  * Infrastructure
8338  *
8339  ****************************************************************************
8340  ****************************************************************************/
8341
8342 /*
8343  * HKEY event callout for other subdrivers go here
8344  * (yes, it is ugly, but it is quick, safe, and gets the job done
8345  */
8346 static void tpacpi_driver_event(const unsigned int hkey_event)
8347 {
8348         if (ibm_backlight_device) {
8349                 switch (hkey_event) {
8350                 case TP_HKEY_EV_BRGHT_UP:
8351                 case TP_HKEY_EV_BRGHT_DOWN:
8352                         tpacpi_brightness_notify_change();
8353                 }
8354         }
8355         if (alsa_card) {
8356                 switch (hkey_event) {
8357                 case TP_HKEY_EV_VOL_UP:
8358                 case TP_HKEY_EV_VOL_DOWN:
8359                 case TP_HKEY_EV_VOL_MUTE:
8360                         volume_alsa_notify_change();
8361                 }
8362         }
8363 }
8364
8365 static void hotkey_driver_event(const unsigned int scancode)
8366 {
8367         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8368 }
8369
8370 /* sysfs name ---------------------------------------------------------- */
8371 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8372                            struct device_attribute *attr,
8373                            char *buf)
8374 {
8375         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8376 }
8377
8378 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8379         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8380
8381 /* --------------------------------------------------------------------- */
8382
8383 /* /proc support */
8384 static struct proc_dir_entry *proc_dir;
8385
8386 /*
8387  * Module and infrastructure proble, init and exit handling
8388  */
8389
8390 static int force_load;
8391
8392 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8393 static const char * __init str_supported(int is_supported)
8394 {
8395         static char text_unsupported[] __initdata = "not supported";
8396
8397         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8398 }
8399 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8400
8401 static void ibm_exit(struct ibm_struct *ibm)
8402 {
8403         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8404
8405         list_del_init(&ibm->all_drivers);
8406
8407         if (ibm->flags.acpi_notify_installed) {
8408                 dbg_printk(TPACPI_DBG_EXIT,
8409                         "%s: acpi_remove_notify_handler\n", ibm->name);
8410                 BUG_ON(!ibm->acpi);
8411                 acpi_remove_notify_handler(*ibm->acpi->handle,
8412                                            ibm->acpi->type,
8413                                            dispatch_acpi_notify);
8414                 ibm->flags.acpi_notify_installed = 0;
8415         }
8416
8417         if (ibm->flags.proc_created) {
8418                 dbg_printk(TPACPI_DBG_EXIT,
8419                         "%s: remove_proc_entry\n", ibm->name);
8420                 remove_proc_entry(ibm->name, proc_dir);
8421                 ibm->flags.proc_created = 0;
8422         }
8423
8424         if (ibm->flags.acpi_driver_registered) {
8425                 dbg_printk(TPACPI_DBG_EXIT,
8426                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8427                 BUG_ON(!ibm->acpi);
8428                 acpi_bus_unregister_driver(ibm->acpi->driver);
8429                 kfree(ibm->acpi->driver);
8430                 ibm->acpi->driver = NULL;
8431                 ibm->flags.acpi_driver_registered = 0;
8432         }
8433
8434         if (ibm->flags.init_called && ibm->exit) {
8435                 ibm->exit();
8436                 ibm->flags.init_called = 0;
8437         }
8438
8439         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8440 }
8441
8442 static int __init ibm_init(struct ibm_init_struct *iibm)
8443 {
8444         int ret;
8445         struct ibm_struct *ibm = iibm->data;
8446         struct proc_dir_entry *entry;
8447
8448         BUG_ON(ibm == NULL);
8449
8450         INIT_LIST_HEAD(&ibm->all_drivers);
8451
8452         if (ibm->flags.experimental && !experimental)
8453                 return 0;
8454
8455         dbg_printk(TPACPI_DBG_INIT,
8456                 "probing for %s\n", ibm->name);
8457
8458         if (iibm->init) {
8459                 ret = iibm->init(iibm);
8460                 if (ret > 0)
8461                         return 0;       /* probe failed */
8462                 if (ret)
8463                         return ret;
8464
8465                 ibm->flags.init_called = 1;
8466         }
8467
8468         if (ibm->acpi) {
8469                 if (ibm->acpi->hid) {
8470                         ret = register_tpacpi_subdriver(ibm);
8471                         if (ret)
8472                                 goto err_out;
8473                 }
8474
8475                 if (ibm->acpi->notify) {
8476                         ret = setup_acpi_notify(ibm);
8477                         if (ret == -ENODEV) {
8478                                 pr_notice("disabling subdriver %s\n",
8479                                           ibm->name);
8480                                 ret = 0;
8481                                 goto err_out;
8482                         }
8483                         if (ret < 0)
8484                                 goto err_out;
8485                 }
8486         }
8487
8488         dbg_printk(TPACPI_DBG_INIT,
8489                 "%s installed\n", ibm->name);
8490
8491         if (ibm->read) {
8492                 mode_t mode = iibm->base_procfs_mode;
8493
8494                 if (!mode)
8495                         mode = S_IRUGO;
8496                 if (ibm->write)
8497                         mode |= S_IWUSR;
8498                 entry = proc_create_data(ibm->name, mode, proc_dir,
8499                                          &dispatch_proc_fops, ibm);
8500                 if (!entry) {
8501                         pr_err("unable to create proc entry %s\n", ibm->name);
8502                         ret = -ENODEV;
8503                         goto err_out;
8504                 }
8505                 ibm->flags.proc_created = 1;
8506         }
8507
8508         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8509
8510         return 0;
8511
8512 err_out:
8513         dbg_printk(TPACPI_DBG_INIT,
8514                 "%s: at error exit path with result %d\n",
8515                 ibm->name, ret);
8516
8517         ibm_exit(ibm);
8518         return (ret < 0)? ret : 0;
8519 }
8520
8521 /* Probing */
8522
8523 static bool __pure __init tpacpi_is_fw_digit(const char c)
8524 {
8525         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8526 }
8527
8528 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8529 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8530                                                 const char t)
8531 {
8532         return s && strlen(s) >= 8 &&
8533                 tpacpi_is_fw_digit(s[0]) &&
8534                 tpacpi_is_fw_digit(s[1]) &&
8535                 s[2] == t && s[3] == 'T' &&
8536                 tpacpi_is_fw_digit(s[4]) &&
8537                 tpacpi_is_fw_digit(s[5]);
8538 }
8539
8540 /* returns 0 - probe ok, or < 0 - probe error.
8541  * Probe ok doesn't mean thinkpad found.
8542  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8543 static int __must_check __init get_thinkpad_model_data(
8544                                                 struct thinkpad_id_data *tp)
8545 {
8546         const struct dmi_device *dev = NULL;
8547         char ec_fw_string[18];
8548         char const *s;
8549
8550         if (!tp)
8551                 return -EINVAL;
8552
8553         memset(tp, 0, sizeof(*tp));
8554
8555         if (dmi_name_in_vendors("IBM"))
8556                 tp->vendor = PCI_VENDOR_ID_IBM;
8557         else if (dmi_name_in_vendors("LENOVO"))
8558                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8559         else
8560                 return 0;
8561
8562         s = dmi_get_system_info(DMI_BIOS_VERSION);
8563         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8564         if (s && !tp->bios_version_str)
8565                 return -ENOMEM;
8566
8567         /* Really ancient ThinkPad 240X will fail this, which is fine */
8568         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8569                 return 0;
8570
8571         tp->bios_model = tp->bios_version_str[0]
8572                          | (tp->bios_version_str[1] << 8);
8573         tp->bios_release = (tp->bios_version_str[4] << 8)
8574                          | tp->bios_version_str[5];
8575
8576         /*
8577          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8578          * X32 or newer, all Z series;  Some models must have an
8579          * up-to-date BIOS or they will not be detected.
8580          *
8581          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8582          */
8583         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8584                 if (sscanf(dev->name,
8585                            "IBM ThinkPad Embedded Controller -[%17c",
8586                            ec_fw_string) == 1) {
8587                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8588                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8589
8590                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8591                         if (!tp->ec_version_str)
8592                                 return -ENOMEM;
8593
8594                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8595                                 tp->ec_model = ec_fw_string[0]
8596                                                 | (ec_fw_string[1] << 8);
8597                                 tp->ec_release = (ec_fw_string[4] << 8)
8598                                                 | ec_fw_string[5];
8599                         } else {
8600                                 pr_notice("ThinkPad firmware release %s "
8601                                           "doesn't match the known patterns\n",
8602                                           ec_fw_string);
8603                                 pr_notice("please report this to %s\n",
8604                                           TPACPI_MAIL);
8605                         }
8606                         break;
8607                 }
8608         }
8609
8610         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8611         if (s && !strnicmp(s, "ThinkPad", 8)) {
8612                 tp->model_str = kstrdup(s, GFP_KERNEL);
8613                 if (!tp->model_str)
8614                         return -ENOMEM;
8615         }
8616
8617         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8618         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8619         if (s && !tp->nummodel_str)
8620                 return -ENOMEM;
8621
8622         return 0;
8623 }
8624
8625 static int __init probe_for_thinkpad(void)
8626 {
8627         int is_thinkpad;
8628
8629         if (acpi_disabled)
8630                 return -ENODEV;
8631
8632         /* It would be dangerous to run the driver in this case */
8633         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8634                 return -ENODEV;
8635
8636         /*
8637          * Non-ancient models have better DMI tagging, but very old models
8638          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8639          */
8640         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8641                       (thinkpad_id.ec_model != 0) ||
8642                       tpacpi_is_fw_known();
8643
8644         /* The EC handler is required */
8645         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8646         if (!ec_handle) {
8647                 if (is_thinkpad)
8648                         pr_err("Not yet supported ThinkPad detected!\n");
8649                 return -ENODEV;
8650         }
8651
8652         if (!is_thinkpad && !force_load)
8653                 return -ENODEV;
8654
8655         return 0;
8656 }
8657
8658 static void __init thinkpad_acpi_init_banner(void)
8659 {
8660         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8661         pr_info("%s\n", TPACPI_URL);
8662
8663         pr_info("ThinkPad BIOS %s, EC %s\n",
8664                 (thinkpad_id.bios_version_str) ?
8665                         thinkpad_id.bios_version_str : "unknown",
8666                 (thinkpad_id.ec_version_str) ?
8667                         thinkpad_id.ec_version_str : "unknown");
8668
8669         BUG_ON(!thinkpad_id.vendor);
8670
8671         if (thinkpad_id.model_str)
8672                 pr_info("%s %s, model %s\n",
8673                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8674                                 "IBM" : ((thinkpad_id.vendor ==
8675                                                 PCI_VENDOR_ID_LENOVO) ?
8676                                         "Lenovo" : "Unknown vendor"),
8677                         thinkpad_id.model_str,
8678                         (thinkpad_id.nummodel_str) ?
8679                                 thinkpad_id.nummodel_str : "unknown");
8680 }
8681
8682 /* Module init, exit, parameters */
8683
8684 static struct ibm_init_struct ibms_init[] __initdata = {
8685         {
8686                 .data = &thinkpad_acpi_driver_data,
8687         },
8688         {
8689                 .init = hotkey_init,
8690                 .data = &hotkey_driver_data,
8691         },
8692         {
8693                 .init = bluetooth_init,
8694                 .data = &bluetooth_driver_data,
8695         },
8696         {
8697                 .init = wan_init,
8698                 .data = &wan_driver_data,
8699         },
8700         {
8701                 .init = uwb_init,
8702                 .data = &uwb_driver_data,
8703         },
8704 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8705         {
8706                 .init = video_init,
8707                 .base_procfs_mode = S_IRUSR,
8708                 .data = &video_driver_data,
8709         },
8710 #endif
8711         {
8712                 .init = light_init,
8713                 .data = &light_driver_data,
8714         },
8715         {
8716                 .init = cmos_init,
8717                 .data = &cmos_driver_data,
8718         },
8719         {
8720                 .init = led_init,
8721                 .data = &led_driver_data,
8722         },
8723         {
8724                 .init = beep_init,
8725                 .data = &beep_driver_data,
8726         },
8727         {
8728                 .init = thermal_init,
8729                 .data = &thermal_driver_data,
8730         },
8731         {
8732                 .init = brightness_init,
8733                 .data = &brightness_driver_data,
8734         },
8735         {
8736                 .init = volume_init,
8737                 .data = &volume_driver_data,
8738         },
8739         {
8740                 .init = fan_init,
8741                 .data = &fan_driver_data,
8742         },
8743 };
8744
8745 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8746 {
8747         unsigned int i;
8748         struct ibm_struct *ibm;
8749
8750         if (!kp || !kp->name || !val)
8751                 return -EINVAL;
8752
8753         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8754                 ibm = ibms_init[i].data;
8755                 WARN_ON(ibm == NULL);
8756
8757                 if (!ibm || !ibm->name)
8758                         continue;
8759
8760                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8761                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8762                                 return -ENOSPC;
8763                         strcpy(ibms_init[i].param, val);
8764                         strcat(ibms_init[i].param, ",");
8765                         return 0;
8766                 }
8767         }
8768
8769         return -EINVAL;
8770 }
8771
8772 module_param(experimental, int, 0444);
8773 MODULE_PARM_DESC(experimental,
8774                  "Enables experimental features when non-zero");
8775
8776 module_param_named(debug, dbg_level, uint, 0);
8777 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8778
8779 module_param(force_load, bool, 0444);
8780 MODULE_PARM_DESC(force_load,
8781                  "Attempts to load the driver even on a "
8782                  "mis-identified ThinkPad when true");
8783
8784 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8785 MODULE_PARM_DESC(fan_control,
8786                  "Enables setting fan parameters features when true");
8787
8788 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8789 MODULE_PARM_DESC(brightness_mode,
8790                  "Selects brightness control strategy: "
8791                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8792
8793 module_param(brightness_enable, uint, 0444);
8794 MODULE_PARM_DESC(brightness_enable,
8795                  "Enables backlight control when 1, disables when 0");
8796
8797 module_param(hotkey_report_mode, uint, 0444);
8798 MODULE_PARM_DESC(hotkey_report_mode,
8799                  "used for backwards compatibility with userspace, "
8800                  "see documentation");
8801
8802 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8803 module_param_named(volume_mode, volume_mode, uint, 0444);
8804 MODULE_PARM_DESC(volume_mode,
8805                  "Selects volume control strategy: "
8806                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8807
8808 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8809 MODULE_PARM_DESC(volume_capabilities,
8810                  "Selects the mixer capabilites: "
8811                  "0=auto, 1=volume and mute, 2=mute only");
8812
8813 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8814 MODULE_PARM_DESC(volume_control,
8815                  "Enables software override for the console audio "
8816                  "control when true");
8817
8818 /* ALSA module API parameters */
8819 module_param_named(index, alsa_index, int, 0444);
8820 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8821 module_param_named(id, alsa_id, charp, 0444);
8822 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8823 module_param_named(enable, alsa_enable, bool, 0444);
8824 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8825 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8826
8827 #define TPACPI_PARAM(feature) \
8828         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8829         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8830                          "at module load, see documentation")
8831
8832 TPACPI_PARAM(hotkey);
8833 TPACPI_PARAM(bluetooth);
8834 TPACPI_PARAM(video);
8835 TPACPI_PARAM(light);
8836 TPACPI_PARAM(cmos);
8837 TPACPI_PARAM(led);
8838 TPACPI_PARAM(beep);
8839 TPACPI_PARAM(brightness);
8840 TPACPI_PARAM(volume);
8841 TPACPI_PARAM(fan);
8842
8843 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8844 module_param(dbg_wlswemul, uint, 0444);
8845 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8846 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8847 MODULE_PARM_DESC(wlsw_state,
8848                  "Initial state of the emulated WLSW switch");
8849
8850 module_param(dbg_bluetoothemul, uint, 0444);
8851 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8852 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8853 MODULE_PARM_DESC(bluetooth_state,
8854                  "Initial state of the emulated bluetooth switch");
8855
8856 module_param(dbg_wwanemul, uint, 0444);
8857 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8858 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8859 MODULE_PARM_DESC(wwan_state,
8860                  "Initial state of the emulated WWAN switch");
8861
8862 module_param(dbg_uwbemul, uint, 0444);
8863 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8864 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8865 MODULE_PARM_DESC(uwb_state,
8866                  "Initial state of the emulated UWB switch");
8867 #endif
8868
8869 static void thinkpad_acpi_module_exit(void)
8870 {
8871         struct ibm_struct *ibm, *itmp;
8872
8873         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8874
8875         list_for_each_entry_safe_reverse(ibm, itmp,
8876                                          &tpacpi_all_drivers,
8877                                          all_drivers) {
8878                 ibm_exit(ibm);
8879         }
8880
8881         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8882
8883         if (tpacpi_inputdev) {
8884                 if (tp_features.input_device_registered)
8885                         input_unregister_device(tpacpi_inputdev);
8886                 else
8887                         input_free_device(tpacpi_inputdev);
8888         }
8889
8890         if (tpacpi_hwmon)
8891                 hwmon_device_unregister(tpacpi_hwmon);
8892
8893         if (tp_features.sensors_pdev_attrs_registered)
8894                 device_remove_file(&tpacpi_sensors_pdev->dev,
8895                                    &dev_attr_thinkpad_acpi_pdev_name);
8896         if (tpacpi_sensors_pdev)
8897                 platform_device_unregister(tpacpi_sensors_pdev);
8898         if (tpacpi_pdev)
8899                 platform_device_unregister(tpacpi_pdev);
8900
8901         if (tp_features.sensors_pdrv_attrs_registered)
8902                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8903         if (tp_features.platform_drv_attrs_registered)
8904                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8905
8906         if (tp_features.sensors_pdrv_registered)
8907                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8908
8909         if (tp_features.platform_drv_registered)
8910                 platform_driver_unregister(&tpacpi_pdriver);
8911
8912         if (proc_dir)
8913                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8914
8915         if (tpacpi_wq)
8916                 destroy_workqueue(tpacpi_wq);
8917
8918         kfree(thinkpad_id.bios_version_str);
8919         kfree(thinkpad_id.ec_version_str);
8920         kfree(thinkpad_id.model_str);
8921 }
8922
8923
8924 static int __init thinkpad_acpi_module_init(void)
8925 {
8926         int ret, i;
8927
8928         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8929
8930         /* Parameter checking */
8931         if (hotkey_report_mode > 2)
8932                 return -EINVAL;
8933
8934         /* Driver-level probe */
8935
8936         ret = get_thinkpad_model_data(&thinkpad_id);
8937         if (ret) {
8938                 pr_err("unable to get DMI data: %d\n", ret);
8939                 thinkpad_acpi_module_exit();
8940                 return ret;
8941         }
8942         ret = probe_for_thinkpad();
8943         if (ret) {
8944                 thinkpad_acpi_module_exit();
8945                 return ret;
8946         }
8947
8948         /* Driver initialization */
8949
8950         thinkpad_acpi_init_banner();
8951         tpacpi_check_outdated_fw();
8952
8953         TPACPI_ACPIHANDLE_INIT(ecrd);
8954         TPACPI_ACPIHANDLE_INIT(ecwr);
8955
8956         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8957         if (!tpacpi_wq) {
8958                 thinkpad_acpi_module_exit();
8959                 return -ENOMEM;
8960         }
8961
8962         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8963         if (!proc_dir) {
8964                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
8965                 thinkpad_acpi_module_exit();
8966                 return -ENODEV;
8967         }
8968
8969         ret = platform_driver_register(&tpacpi_pdriver);
8970         if (ret) {
8971                 pr_err("unable to register main platform driver\n");
8972                 thinkpad_acpi_module_exit();
8973                 return ret;
8974         }
8975         tp_features.platform_drv_registered = 1;
8976
8977         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8978         if (ret) {
8979                 pr_err("unable to register hwmon platform driver\n");
8980                 thinkpad_acpi_module_exit();
8981                 return ret;
8982         }
8983         tp_features.sensors_pdrv_registered = 1;
8984
8985         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8986         if (!ret) {
8987                 tp_features.platform_drv_attrs_registered = 1;
8988                 ret = tpacpi_create_driver_attributes(
8989                                         &tpacpi_hwmon_pdriver.driver);
8990         }
8991         if (ret) {
8992                 pr_err("unable to create sysfs driver attributes\n");
8993                 thinkpad_acpi_module_exit();
8994                 return ret;
8995         }
8996         tp_features.sensors_pdrv_attrs_registered = 1;
8997
8998
8999         /* Device initialization */
9000         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9001                                                         NULL, 0);
9002         if (IS_ERR(tpacpi_pdev)) {
9003                 ret = PTR_ERR(tpacpi_pdev);
9004                 tpacpi_pdev = NULL;
9005                 pr_err("unable to register platform device\n");
9006                 thinkpad_acpi_module_exit();
9007                 return ret;
9008         }
9009         tpacpi_sensors_pdev = platform_device_register_simple(
9010                                                 TPACPI_HWMON_DRVR_NAME,
9011                                                 -1, NULL, 0);
9012         if (IS_ERR(tpacpi_sensors_pdev)) {
9013                 ret = PTR_ERR(tpacpi_sensors_pdev);
9014                 tpacpi_sensors_pdev = NULL;
9015                 pr_err("unable to register hwmon platform device\n");
9016                 thinkpad_acpi_module_exit();
9017                 return ret;
9018         }
9019         ret = device_create_file(&tpacpi_sensors_pdev->dev,
9020                                  &dev_attr_thinkpad_acpi_pdev_name);
9021         if (ret) {
9022                 pr_err("unable to create sysfs hwmon device attributes\n");
9023                 thinkpad_acpi_module_exit();
9024                 return ret;
9025         }
9026         tp_features.sensors_pdev_attrs_registered = 1;
9027         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9028         if (IS_ERR(tpacpi_hwmon)) {
9029                 ret = PTR_ERR(tpacpi_hwmon);
9030                 tpacpi_hwmon = NULL;
9031                 pr_err("unable to register hwmon device\n");
9032                 thinkpad_acpi_module_exit();
9033                 return ret;
9034         }
9035         mutex_init(&tpacpi_inputdev_send_mutex);
9036         tpacpi_inputdev = input_allocate_device();
9037         if (!tpacpi_inputdev) {
9038                 pr_err("unable to allocate input device\n");
9039                 thinkpad_acpi_module_exit();
9040                 return -ENOMEM;
9041         } else {
9042                 /* Prepare input device, but don't register */
9043                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9044                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9045                 tpacpi_inputdev->id.bustype = BUS_HOST;
9046                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9047                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9048                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9049                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9050         }
9051
9052         /* Init subdriver dependencies */
9053         tpacpi_detect_brightness_capabilities();
9054
9055         /* Init subdrivers */
9056         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9057                 ret = ibm_init(&ibms_init[i]);
9058                 if (ret >= 0 && *ibms_init[i].param)
9059                         ret = ibms_init[i].data->write(ibms_init[i].param);
9060                 if (ret < 0) {
9061                         thinkpad_acpi_module_exit();
9062                         return ret;
9063                 }
9064         }
9065
9066         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9067
9068         ret = input_register_device(tpacpi_inputdev);
9069         if (ret < 0) {
9070                 pr_err("unable to register input device\n");
9071                 thinkpad_acpi_module_exit();
9072                 return ret;
9073         } else {
9074                 tp_features.input_device_registered = 1;
9075         }
9076
9077         return 0;
9078 }
9079
9080 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9081
9082 /*
9083  * This will autoload the driver in almost every ThinkPad
9084  * in widespread use.
9085  *
9086  * Only _VERY_ old models, like the 240, 240x and 570 lack
9087  * the HKEY event interface.
9088  */
9089 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9090
9091 /*
9092  * DMI matching for module autoloading
9093  *
9094  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9095  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9096  *
9097  * Only models listed in thinkwiki will be supported, so add yours
9098  * if it is not there yet.
9099  */
9100 #define IBM_BIOS_MODULE_ALIAS(__type) \
9101         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9102
9103 /* Ancient thinkpad BIOSes have to be identified by
9104  * BIOS type or model number, and there are far less
9105  * BIOS types than model numbers... */
9106 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
9107
9108 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9109 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9110 MODULE_DESCRIPTION(TPACPI_DESC);
9111 MODULE_VERSION(TPACPI_VERSION);
9112 MODULE_LICENSE("GPL");
9113
9114 module_init(thinkpad_acpi_module_init);
9115 module_exit(thinkpad_acpi_module_exit);