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 "0.25"
  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 #include <linux/nvram.h>
  65 #include <linux/proc_fs.h>
  66 #include <linux/seq_file.h>
  67 #include <linux/sysfs.h>
  68 #include <linux/backlight.h>
  69 #include <linux/fb.h>
  70 #include <linux/platform_device.h>
  71 #include <linux/hwmon.h>
  72 #include <linux/hwmon-sysfs.h>
  73 #include <linux/input.h>
  74 #include <linux/leds.h>
  75 #include <linux/rfkill.h>
  76 #include <linux/dmi.h>
  77 #include <linux/jiffies.h>
  78 #include <linux/workqueue.h>
  79 #include <linux/acpi.h>
  80 #include <linux/pci_ids.h>
  81 #include <linux/thinkpad_acpi.h>
  82 #include <sound/core.h>
  83 #include <sound/control.h>
  84 #include <sound/initval.h>
  85 #include <asm/uaccess.h>
  86 #include <acpi/video.h>
  87
  88 /* ThinkPad CMOS commands */
  89 #define TP_CMOS_VOLUME_DOWN     0
  90 #define TP_CMOS_VOLUME_UP       1
  91 #define TP_CMOS_VOLUME_MUTE     2
  92 #define TP_CMOS_BRIGHTNESS_UP   4
  93 #define TP_CMOS_BRIGHTNESS_DOWN 5
  94 #define TP_CMOS_THINKLIGHT_ON   12
  95 #define TP_CMOS_THINKLIGHT_OFF  13
  96
  97 /* NVRAM Addresses */
  98 enum tp_nvram_addr {
  99         TP_NVRAM_ADDR_HK2               = 0x57,
 100         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
 101         TP_NVRAM_ADDR_VIDEO             = 0x59,
 102         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
 103         TP_NVRAM_ADDR_MIXER             = 0x60,
 104 };
 105
 106 /* NVRAM bit masks */
 107 enum {
 108         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 109         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 110         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 111         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 112         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 113         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 114         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 115         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 116         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 117         TP_NVRAM_MASK_MUTE              = 0x40,
 118         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 119         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 120         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 121 };
 122
 123 /* Misc NVRAM-related */
 124 enum {
 125         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
 126 };
 127
 128 /* ACPI HIDs */
 129 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
 130 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
 131 #define TPACPI_ACPI_EC_HID              "PNP0C09"
 132
 133 /* Input IDs */
 134 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 135 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 136
 137 /* ACPI \WGSV commands */
 138 enum {
 139         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 140         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 141         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 142         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 143 };
 144
 145 /* TP_ACPI_WGSV_GET_STATE bits */
 146 enum {
 147         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 148         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 149         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 150         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 151         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 152         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 153         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 154         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 155         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 156         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 157 };
 158
 159 /* HKEY events */
 160 enum tpacpi_hkey_event_t {
 161         /* Hotkey-related */
 162         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 163         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 164         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 165         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 166         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 167         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 168
 169         /* Reasons for waking up from S3/S4 */
 170         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 171         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 172         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 173         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 174         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 175         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 176
 177         /* Auto-sleep after eject request */
 178         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 179         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 180
 181         /* Misc bay events */
 182         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 183         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
 184                                                      or port replicator */
 185         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
 186                                                      dock or port replicator */
 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         /* Key-related user-interface events */
 198         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
 199         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
 200         TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
 201
 202         /* Thermal events */
 203         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 204         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 205         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 206         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 207         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 208
 209         /* AC-related events */
 210         TP_HKEY_EV_AC_CHANGED           = 0x6040, /* AC status changed */
 211
 212         /* Misc */
 213         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 214 };
 215
 216 /****************************************************************************
 217  * Main driver
 218  */
 219
 220 #define TPACPI_NAME "thinkpad"
 221 #define TPACPI_DESC "ThinkPad ACPI Extras"
 222 #define TPACPI_FILE TPACPI_NAME "_acpi"
 223 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 224 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 225
 226 #define TPACPI_PROC_DIR "ibm"
 227 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 228 #define TPACPI_DRVR_NAME TPACPI_FILE
 229 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 230 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 231
 232 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 233 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 234
 235 #define TPACPI_MAX_ACPI_ARGS 3
 236
 237 /* Debugging printk groups */
 238 #define TPACPI_DBG_ALL          0xffff
 239 #define TPACPI_DBG_DISCLOSETASK 0x8000
 240 #define TPACPI_DBG_INIT         0x0001
 241 #define TPACPI_DBG_EXIT         0x0002
 242 #define TPACPI_DBG_RFKILL       0x0004
 243 #define TPACPI_DBG_HKEY         0x0008
 244 #define TPACPI_DBG_FAN          0x0010
 245 #define TPACPI_DBG_BRGHT        0x0020
 246 #define TPACPI_DBG_MIXER        0x0040
 247
 248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 251
 252
 253 /****************************************************************************
 254  * Driver-wide structs and misc. variables
 255  */
 256
 257 struct ibm_struct;
 258
 259 struct tp_acpi_drv_struct {
 260         const struct acpi_device_id *hid;
 261         struct acpi_driver *driver;
 262
 263         void (*notify) (struct ibm_struct *, u32);
 264         acpi_handle *handle;
 265         u32 type;
 266         struct acpi_device *device;
 267 };
 268
 269 struct ibm_struct {
 270         char *name;
 271
 272         int (*read) (struct seq_file *);
 273         int (*write) (char *);
 274         void (*exit) (void);
 275         void (*resume) (void);
 276         void (*suspend) (void);
 277         void (*shutdown) (void);
 278
 279         struct list_head all_drivers;
 280
 281         struct tp_acpi_drv_struct *acpi;
 282
 283         struct {
 284                 u8 acpi_driver_registered:1;
 285                 u8 acpi_notify_installed:1;
 286                 u8 proc_created:1;
 287                 u8 init_called:1;
 288                 u8 experimental:1;
 289         } flags;
 290 };
 291
 292 struct ibm_init_struct {
 293         char param[32];
 294
 295         int (*init) (struct ibm_init_struct *);
 296         umode_t base_procfs_mode;
 297         struct ibm_struct *data;
 298 };
 299
 300 static struct {
 301         u32 bluetooth:1;
 302         u32 hotkey:1;
 303         u32 hotkey_mask:1;
 304         u32 hotkey_wlsw:1;
 305         u32 hotkey_tablet:1;
 306         u32 kbdlight:1;
 307         u32 light:1;
 308         u32 light_status:1;
 309         u32 bright_acpimode:1;
 310         u32 bright_unkfw:1;
 311         u32 wan:1;
 312         u32 uwb:1;
 313         u32 fan_ctrl_status_undef:1;
 314         u32 second_fan:1;
 315         u32 beep_needs_two_args:1;
 316         u32 mixer_no_level_control:1;
 317         u32 input_device_registered:1;
 318         u32 platform_drv_registered:1;
 319         u32 platform_drv_attrs_registered:1;
 320         u32 sensors_pdrv_registered:1;
 321         u32 sensors_pdrv_attrs_registered:1;
 322         u32 sensors_pdev_attrs_registered:1;
 323         u32 hotkey_poll_active:1;
 324         u32 has_adaptive_kbd:1;
 325 } tp_features;
 326
 327 static struct {
 328         u16 hotkey_mask_ff:1;
 329         u16 volume_ctrl_forbidden:1;
 330 } tp_warned;
 331
 332 struct thinkpad_id_data {
 333         unsigned int vendor;    /* ThinkPad vendor:
 334                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 335
 336         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 337         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 338
 339         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 340         u16 ec_model;
 341         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 342         u16 ec_release;
 343
 344         char *model_str;        /* ThinkPad T43 */
 345         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 346 };
 347 static struct thinkpad_id_data thinkpad_id;
 348
 349 static enum {
 350         TPACPI_LIFE_INIT = 0,
 351         TPACPI_LIFE_RUNNING,
 352         TPACPI_LIFE_EXITING,
 353 } tpacpi_lifecycle;
 354
 355 static int experimental;
 356 static u32 dbg_level;
 357
 358 static struct workqueue_struct *tpacpi_wq;
 359
 360 enum led_status_t {
 361         TPACPI_LED_OFF = 0,
 362         TPACPI_LED_ON,
 363         TPACPI_LED_BLINK,
 364 };
 365
 366 /* Special LED class that can defer work */
 367 struct tpacpi_led_classdev {
 368         struct led_classdev led_classdev;
 369         struct work_struct work;
 370         enum led_status_t new_state;
 371         int led;
 372 };
 373
 374 /* brightness level capabilities */
 375 static unsigned int bright_maxlvl;      /* 0 = unknown */
 376
 377 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 378 static int dbg_wlswemul;
 379 static bool tpacpi_wlsw_emulstate;
 380 static int dbg_bluetoothemul;
 381 static bool tpacpi_bluetooth_emulstate;
 382 static int dbg_wwanemul;
 383 static bool tpacpi_wwan_emulstate;
 384 static int dbg_uwbemul;
 385 static bool tpacpi_uwb_emulstate;
 386 #endif
 387
 388
 389 /*************************************************************************
 390  *  Debugging helpers
 391  */
 392
 393 #define dbg_printk(a_dbg_level, format, arg...)                         \
 394 do {                                                                    \
 395         if (dbg_level & (a_dbg_level))                                  \
 396                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 397                        __func__, ##arg);                                \
 398 } while (0)
 399
 400 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 401 #define vdbg_printk dbg_printk
 402 static const char *str_supported(int is_supported);
 403 #else
 404 static inline const char *str_supported(int is_supported) { return ""; }
 405 #define vdbg_printk(a_dbg_level, format, arg...)        \
 406         do { if (0) no_printk(format, ##arg); } while (0)
 407 #endif
 408
 409 static void tpacpi_log_usertask(const char * const what)
 410 {
 411         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 412                what, task_tgid_vnr(current));
 413 }
 414
 415 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 416 do {                                                                    \
 417         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 418                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 419                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 420                        what, task_tgid_vnr(current), ## arg);           \
 421         }                                                               \
 422 } while (0)
 423
 424 /*
 425  * Quirk handling helpers
 426  *
 427  * ThinkPad IDs and versions seen in the field so far
 428  * are two-characters from the set [0-9A-Z], i.e. base 36.
 429  *
 430  * We use values well outside that range as specials.
 431  */
 432
 433 #define TPACPI_MATCH_ANY                0xffffU
 434 #define TPACPI_MATCH_UNKNOWN            0U
 435
 436 /* TPID('1', 'Y') == 0x5931 */
 437 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 438
 439 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 440         { .vendor = PCI_VENDOR_ID_IBM,          \
 441           .bios = TPID(__id1, __id2),           \
 442           .ec = TPACPI_MATCH_ANY,               \
 443           .quirks = (__quirk) }
 444
 445 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 446         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 447           .bios = TPID(__id1, __id2),           \
 448           .ec = TPACPI_MATCH_ANY,               \
 449           .quirks = (__quirk) }
 450
 451 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 452         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 453           .bios = TPACPI_MATCH_ANY,             \
 454           .ec = TPID(__id1, __id2),             \
 455           .quirks = (__quirk) }
 456
 457 struct tpacpi_quirk {
 458         unsigned int vendor;
 459         u16 bios;
 460         u16 ec;
 461         unsigned long quirks;
 462 };
 463
 464 /**
 465  * tpacpi_check_quirks() - search BIOS/EC version on a list
 466  * @qlist:              array of &struct tpacpi_quirk
 467  * @qlist_size:         number of elements in @qlist
 468  *
 469  * Iterates over a quirks list until one is found that matches the
 470  * ThinkPad's vendor, BIOS and EC model.
 471  *
 472  * Returns 0 if nothing matches, otherwise returns the quirks field of
 473  * the matching &struct tpacpi_quirk entry.
 474  *
 475  * The match criteria is: vendor, ec and bios much match.
 476  */
 477 static unsigned long __init tpacpi_check_quirks(
 478                         const struct tpacpi_quirk *qlist,
 479                         unsigned int qlist_size)
 480 {
 481         while (qlist_size) {
 482                 if ((qlist->vendor == thinkpad_id.vendor ||
 483                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 484                     (qlist->bios == thinkpad_id.bios_model ||
 485                                 qlist->bios == TPACPI_MATCH_ANY) &&
 486                     (qlist->ec == thinkpad_id.ec_model ||
 487                                 qlist->ec == TPACPI_MATCH_ANY))
 488                         return qlist->quirks;
 489
 490                 qlist_size--;
 491                 qlist++;
 492         }
 493         return 0;
 494 }
 495
 496 static inline bool __pure __init tpacpi_is_lenovo(void)
 497 {
 498         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 499 }
 500
 501 static inline bool __pure __init tpacpi_is_ibm(void)
 502 {
 503         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 504 }
 505
 506 /****************************************************************************
 507  ****************************************************************************
 508  *
 509  * ACPI Helpers and device model
 510  *
 511  ****************************************************************************
 512  ****************************************************************************/
 513
 514 /*************************************************************************
 515  * ACPI basic handles
 516  */
 517
 518 static acpi_handle root_handle;
 519 static acpi_handle ec_handle;
 520
 521 #define TPACPI_HANDLE(object, parent, paths...)                 \
 522         static acpi_handle  object##_handle;                    \
 523         static const acpi_handle * const object##_parent __initconst =  \
 524                                                 &parent##_handle; \
 525         static char *object##_paths[] __initdata = { paths }
 526
 527 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 528 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 529
 530 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 531                                         /* T4x, X31, X40 */
 532            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 533            "\\CMS",             /* R40, R40e */
 534            );                   /* all others */
 535
 536 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 537            "^HKEY",             /* R30, R31 */
 538            "HKEY",              /* all others */
 539            );                   /* 570 */
 540
 541 /*************************************************************************
 542  * ACPI helpers
 543  */
 544
 545 static int acpi_evalf(acpi_handle handle,
 546                       int *res, char *method, char *fmt, ...)
 547 {
 548         char *fmt0 = fmt;
 549         struct acpi_object_list params;
 550         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 551         struct acpi_buffer result, *resultp;
 552         union acpi_object out_obj;
 553         acpi_status status;
 554         va_list ap;
 555         char res_type;
 556         int success;
 557         int quiet;
 558
 559         if (!*fmt) {
 560                 pr_err("acpi_evalf() called with empty format\n");
 561                 return 0;
 562         }
 563
 564         if (*fmt == 'q') {
 565                 quiet = 1;
 566                 fmt++;
 567         } else
 568                 quiet = 0;
 569
 570         res_type = *(fmt++);
 571
 572         params.count = 0;
 573         params.pointer = &in_objs[0];
 574
 575         va_start(ap, fmt);
 576         while (*fmt) {
 577                 char c = *(fmt++);
 578                 switch (c) {
 579                 case 'd':       /* int */
 580                         in_objs[params.count].integer.value = va_arg(ap, int);
 581                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 582                         break;
 583                         /* add more types as needed */
 584                 default:
 585                         pr_err("acpi_evalf() called "
 586                                "with invalid format character '%c'\n", c);
 587                         va_end(ap);
 588                         return 0;
 589                 }
 590         }
 591         va_end(ap);
 592
 593         if (res_type != 'v') {
 594                 result.length = sizeof(out_obj);
 595                 result.pointer = &out_obj;
 596                 resultp = &result;
 597         } else
 598                 resultp = NULL;
 599
 600         status = acpi_evaluate_object(handle, method, &params, resultp);
 601
 602         switch (res_type) {
 603         case 'd':               /* int */
 604                 success = (status == AE_OK &&
 605                            out_obj.type == ACPI_TYPE_INTEGER);
 606                 if (success && res)
 607                         *res = out_obj.integer.value;
 608                 break;
 609         case 'v':               /* void */
 610                 success = status == AE_OK;
 611                 break;
 612                 /* add more types as needed */
 613         default:
 614                 pr_err("acpi_evalf() called "
 615                        "with invalid format character '%c'\n", res_type);
 616                 return 0;
 617         }
 618
 619         if (!success && !quiet)
 620                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 621                        method, fmt0, acpi_format_exception(status));
 622
 623         return success;
 624 }
 625
 626 static int acpi_ec_read(int i, u8 *p)
 627 {
 628         int v;
 629
 630         if (ecrd_handle) {
 631                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 632                         return 0;
 633                 *p = v;
 634         } else {
 635                 if (ec_read(i, p) < 0)
 636                         return 0;
 637         }
 638
 639         return 1;
 640 }
 641
 642 static int acpi_ec_write(int i, u8 v)
 643 {
 644         if (ecwr_handle) {
 645                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 646                         return 0;
 647         } else {
 648                 if (ec_write(i, v) < 0)
 649                         return 0;
 650         }
 651
 652         return 1;
 653 }
 654
 655 static int issue_thinkpad_cmos_command(int cmos_cmd)
 656 {
 657         if (!cmos_handle)
 658                 return -ENXIO;
 659
 660         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 661                 return -EIO;
 662
 663         return 0;
 664 }
 665
 666 /*************************************************************************
 667  * ACPI device model
 668  */
 669
 670 #define TPACPI_ACPIHANDLE_INIT(object) \
 671         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 672                 object##_paths, ARRAY_SIZE(object##_paths))
 673
 674 static void __init drv_acpi_handle_init(const char *name,
 675                            acpi_handle *handle, const acpi_handle parent,
 676                            char **paths, const int num_paths)
 677 {
 678         int i;
 679         acpi_status status;
 680
 681         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 682                 name);
 683
 684         for (i = 0; i < num_paths; i++) {
 685                 status = acpi_get_handle(parent, paths[i], handle);
 686                 if (ACPI_SUCCESS(status)) {
 687                         dbg_printk(TPACPI_DBG_INIT,
 688                                    "Found ACPI handle %s for %s\n",
 689                                    paths[i], name);
 690                         return;
 691                 }
 692         }
 693
 694         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 695                     name);
 696         *handle = NULL;
 697 }
 698
 699 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 700                         u32 level, void *context, void **return_value)
 701 {
 702         struct acpi_device *dev;
 703         if (!strcmp(context, "video")) {
 704                 if (acpi_bus_get_device(handle, &dev))
 705                         return AE_OK;
 706                 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
 707                         return AE_OK;
 708         }
 709
 710         *(acpi_handle *)return_value = handle;
 711
 712         return AE_CTRL_TERMINATE;
 713 }
 714
 715 static void __init tpacpi_acpi_handle_locate(const char *name,
 716                 const char *hid,
 717                 acpi_handle *handle)
 718 {
 719         acpi_status status;
 720         acpi_handle device_found;
 721
 722         BUG_ON(!name || !handle);
 723         vdbg_printk(TPACPI_DBG_INIT,
 724                         "trying to locate ACPI handle for %s, using HID %s\n",
 725                         name, hid ? hid : "NULL");
 726
 727         memset(&device_found, 0, sizeof(device_found));
 728         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 729                                   (void *)name, &device_found);
 730
 731         *handle = NULL;
 732
 733         if (ACPI_SUCCESS(status)) {
 734                 *handle = device_found;
 735                 dbg_printk(TPACPI_DBG_INIT,
 736                            "Found ACPI handle for %s\n", name);
 737         } else {
 738                 vdbg_printk(TPACPI_DBG_INIT,
 739                             "Could not locate an ACPI handle for %s: %s\n",
 740                             name, acpi_format_exception(status));
 741         }
 742 }
 743
 744 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 745 {
 746         struct ibm_struct *ibm = data;
 747
 748         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 749                 return;
 750
 751         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 752                 return;
 753
 754         ibm->acpi->notify(ibm, event);
 755 }
 756
 757 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 758 {
 759         acpi_status status;
 760         int rc;
 761
 762         BUG_ON(!ibm->acpi);
 763
 764         if (!*ibm->acpi->handle)
 765                 return 0;
 766
 767         vdbg_printk(TPACPI_DBG_INIT,
 768                 "setting up ACPI notify for %s\n", ibm->name);
 769
 770         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 771         if (rc < 0) {
 772                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 773                 return -ENODEV;
 774         }
 775
 776         ibm->acpi->device->driver_data = ibm;
 777         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 778                 TPACPI_ACPI_EVENT_PREFIX,
 779                 ibm->name);
 780
 781         status = acpi_install_notify_handler(*ibm->acpi->handle,
 782                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 783         if (ACPI_FAILURE(status)) {
 784                 if (status == AE_ALREADY_EXISTS) {
 785                         pr_notice("another device driver is already "
 786                                   "handling %s events\n", ibm->name);
 787                 } else {
 788                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 789                                ibm->name, acpi_format_exception(status));
 790                 }
 791                 return -ENODEV;
 792         }
 793         ibm->flags.acpi_notify_installed = 1;
 794         return 0;
 795 }
 796
 797 static int __init tpacpi_device_add(struct acpi_device *device)
 798 {
 799         return 0;
 800 }
 801
 802 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 803 {
 804         int rc;
 805
 806         dbg_printk(TPACPI_DBG_INIT,
 807                 "registering %s as an ACPI driver\n", ibm->name);
 808
 809         BUG_ON(!ibm->acpi);
 810
 811         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 812         if (!ibm->acpi->driver) {
 813                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 814                 return -ENOMEM;
 815         }
 816
 817         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 818         ibm->acpi->driver->ids = ibm->acpi->hid;
 819
 820         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 821
 822         rc = acpi_bus_register_driver(ibm->acpi->driver);
 823         if (rc < 0) {
 824                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 825                        ibm->name, rc);
 826                 kfree(ibm->acpi->driver);
 827                 ibm->acpi->driver = NULL;
 828         } else if (!rc)
 829                 ibm->flags.acpi_driver_registered = 1;
 830
 831         return rc;
 832 }
 833
 834
 835 /****************************************************************************
 836  ****************************************************************************
 837  *
 838  * Procfs Helpers
 839  *
 840  ****************************************************************************
 841  ****************************************************************************/
 842
 843 static int dispatch_proc_show(struct seq_file *m, void *v)
 844 {
 845         struct ibm_struct *ibm = m->private;
 846
 847         if (!ibm || !ibm->read)
 848                 return -EINVAL;
 849         return ibm->read(m);
 850 }
 851
 852 static int dispatch_proc_open(struct inode *inode, struct file *file)
 853 {
 854         return single_open(file, dispatch_proc_show, PDE_DATA(inode));
 855 }
 856
 857 static ssize_t dispatch_proc_write(struct file *file,
 858                         const char __user *userbuf,
 859                         size_t count, loff_t *pos)
 860 {
 861         struct ibm_struct *ibm = PDE_DATA(file_inode(file));
 862         char *kernbuf;
 863         int ret;
 864
 865         if (!ibm || !ibm->write)
 866                 return -EINVAL;
 867         if (count > PAGE_SIZE - 2)
 868                 return -EINVAL;
 869
 870         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 871         if (!kernbuf)
 872                 return -ENOMEM;
 873
 874         if (copy_from_user(kernbuf, userbuf, count)) {
 875                 kfree(kernbuf);
 876                 return -EFAULT;
 877         }
 878
 879         kernbuf[count] = 0;
 880         strcat(kernbuf, ",");
 881         ret = ibm->write(kernbuf);
 882         if (ret == 0)
 883                 ret = count;
 884
 885         kfree(kernbuf);
 886
 887         return ret;
 888 }
 889
 890 static const struct file_operations dispatch_proc_fops = {
 891         .owner          = THIS_MODULE,
 892         .open           = dispatch_proc_open,
 893         .read           = seq_read,
 894         .llseek         = seq_lseek,
 895         .release        = single_release,
 896         .write          = dispatch_proc_write,
 897 };
 898
 899 static char *next_cmd(char **cmds)
 900 {
 901         char *start = *cmds;
 902         char *end;
 903
 904         while ((end = strchr(start, ',')) && end == start)
 905                 start = end + 1;
 906
 907         if (!end)
 908                 return NULL;
 909
 910         *end = 0;
 911         *cmds = end + 1;
 912         return start;
 913 }
 914
 915
 916 /****************************************************************************
 917  ****************************************************************************
 918  *
 919  * Device model: input, hwmon and platform
 920  *
 921  ****************************************************************************
 922  ****************************************************************************/
 923
 924 static struct platform_device *tpacpi_pdev;
 925 static struct platform_device *tpacpi_sensors_pdev;
 926 static struct device *tpacpi_hwmon;
 927 static struct input_dev *tpacpi_inputdev;
 928 static struct mutex tpacpi_inputdev_send_mutex;
 929 static LIST_HEAD(tpacpi_all_drivers);
 930
 931 #ifdef CONFIG_PM_SLEEP
 932 static int tpacpi_suspend_handler(struct device *dev)
 933 {
 934         struct ibm_struct *ibm, *itmp;
 935
 936         list_for_each_entry_safe(ibm, itmp,
 937                                  &tpacpi_all_drivers,
 938                                  all_drivers) {
 939                 if (ibm->suspend)
 940                         (ibm->suspend)();
 941         }
 942
 943         return 0;
 944 }
 945
 946 static int tpacpi_resume_handler(struct device *dev)
 947 {
 948         struct ibm_struct *ibm, *itmp;
 949
 950         list_for_each_entry_safe(ibm, itmp,
 951                                  &tpacpi_all_drivers,
 952                                  all_drivers) {
 953                 if (ibm->resume)
 954                         (ibm->resume)();
 955         }
 956
 957         return 0;
 958 }
 959 #endif
 960
 961 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
 962                          tpacpi_suspend_handler, tpacpi_resume_handler);
 963
 964 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 965 {
 966         struct ibm_struct *ibm, *itmp;
 967
 968         list_for_each_entry_safe(ibm, itmp,
 969                                  &tpacpi_all_drivers,
 970                                  all_drivers) {
 971                 if (ibm->shutdown)
 972                         (ibm->shutdown)();
 973         }
 974 }
 975
 976 static struct platform_driver tpacpi_pdriver = {
 977         .driver = {
 978                 .name = TPACPI_DRVR_NAME,
 979                 .pm = &tpacpi_pm,
 980         },
 981         .shutdown = tpacpi_shutdown_handler,
 982 };
 983
 984 static struct platform_driver tpacpi_hwmon_pdriver = {
 985         .driver = {
 986                 .name = TPACPI_HWMON_DRVR_NAME,
 987         },
 988 };
 989
 990 /*************************************************************************
 991  * sysfs support helpers
 992  */
 993
 994 struct attribute_set {
 995         unsigned int members, max_members;
 996         struct attribute_group group;
 997 };
 998
 999 struct attribute_set_obj {
1000         struct attribute_set s;
1001         struct attribute *a;
1002 } __attribute__((packed));
1003
1004 static struct attribute_set *create_attr_set(unsigned int max_members,
1005                                                 const char *name)
1006 {
1007         struct attribute_set_obj *sobj;
1008
1009         if (max_members == 0)
1010                 return NULL;
1011
1012         /* Allocates space for implicit NULL at the end too */
1013         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1014                     max_members * sizeof(struct attribute *),
1015                     GFP_KERNEL);
1016         if (!sobj)
1017                 return NULL;
1018         sobj->s.max_members = max_members;
1019         sobj->s.group.attrs = &sobj->a;
1020         sobj->s.group.name = name;
1021
1022         return &sobj->s;
1023 }
1024
1025 #define destroy_attr_set(_set) \
1026         kfree(_set);
1027
1028 /* not multi-threaded safe, use it in a single thread per set */
1029 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1030 {
1031         if (!s || !attr)
1032                 return -EINVAL;
1033
1034         if (s->members >= s->max_members)
1035                 return -ENOMEM;
1036
1037         s->group.attrs[s->members] = attr;
1038         s->members++;
1039
1040         return 0;
1041 }
1042
1043 static int add_many_to_attr_set(struct attribute_set *s,
1044                         struct attribute **attr,
1045                         unsigned int count)
1046 {
1047         int i, res;
1048
1049         for (i = 0; i < count; i++) {
1050                 res = add_to_attr_set(s, attr[i]);
1051                 if (res)
1052                         return res;
1053         }
1054
1055         return 0;
1056 }
1057
1058 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1059 {
1060         sysfs_remove_group(kobj, &s->group);
1061         destroy_attr_set(s);
1062 }
1063
1064 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1065         sysfs_create_group(_kobj, &_attr_set->group)
1066
1067 static int parse_strtoul(const char *buf,
1068                 unsigned long max, unsigned long *value)
1069 {
1070         char *endp;
1071
1072         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1073         endp = skip_spaces(endp);
1074         if (*endp || *value > max)
1075                 return -EINVAL;
1076
1077         return 0;
1078 }
1079
1080 static void tpacpi_disable_brightness_delay(void)
1081 {
1082         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1083                 pr_notice("ACPI backlight control delay disabled\n");
1084 }
1085
1086 static void printk_deprecated_attribute(const char * const what,
1087                                         const char * const details)
1088 {
1089         tpacpi_log_usertask("deprecated sysfs attribute");
1090         pr_warn("WARNING: sysfs attribute %s is deprecated and "
1091                 "will be removed. %s\n",
1092                 what, details);
1093 }
1094
1095 /*************************************************************************
1096  * rfkill and radio control support helpers
1097  */
1098
1099 /*
1100  * ThinkPad-ACPI firmware handling model:
1101  *
1102  * WLSW (master wireless switch) is event-driven, and is common to all
1103  * firmware-controlled radios.  It cannot be controlled, just monitored,
1104  * as expected.  It overrides all radio state in firmware
1105  *
1106  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1107  * (TODO: verify how WLSW interacts with the returned radio state).
1108  *
1109  * The only time there are shadow radio state changes, is when
1110  * masked-off hotkeys are used.
1111  */
1112
1113 /*
1114  * Internal driver API for radio state:
1115  *
1116  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1117  * bool: true means radio blocked (off)
1118  */
1119 enum tpacpi_rfkill_state {
1120         TPACPI_RFK_RADIO_OFF = 0,
1121         TPACPI_RFK_RADIO_ON
1122 };
1123
1124 /* rfkill switches */
1125 enum tpacpi_rfk_id {
1126         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1127         TPACPI_RFK_WWAN_SW_ID,
1128         TPACPI_RFK_UWB_SW_ID,
1129         TPACPI_RFK_SW_MAX
1130 };
1131
1132 static const char *tpacpi_rfkill_names[] = {
1133         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1134         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1135         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1136         [TPACPI_RFK_SW_MAX] = NULL
1137 };
1138
1139 /* ThinkPad-ACPI rfkill subdriver */
1140 struct tpacpi_rfk {
1141         struct rfkill *rfkill;
1142         enum tpacpi_rfk_id id;
1143         const struct tpacpi_rfk_ops *ops;
1144 };
1145
1146 struct tpacpi_rfk_ops {
1147         /* firmware interface */
1148         int (*get_status)(void);
1149         int (*set_status)(const enum tpacpi_rfkill_state);
1150 };
1151
1152 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1153
1154 /* Query FW and update rfkill sw state for a given rfkill switch */
1155 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1156 {
1157         int status;
1158
1159         if (!tp_rfk)
1160                 return -ENODEV;
1161
1162         status = (tp_rfk->ops->get_status)();
1163         if (status < 0)
1164                 return status;
1165
1166         rfkill_set_sw_state(tp_rfk->rfkill,
1167                             (status == TPACPI_RFK_RADIO_OFF));
1168
1169         return status;
1170 }
1171
1172 /* Query FW and update rfkill sw state for all rfkill switches */
1173 static void tpacpi_rfk_update_swstate_all(void)
1174 {
1175         unsigned int i;
1176
1177         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1178                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1179 }
1180
1181 /*
1182  * Sync the HW-blocking state of all rfkill switches,
1183  * do notice it causes the rfkill core to schedule uevents
1184  */
1185 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1186 {
1187         unsigned int i;
1188         struct tpacpi_rfk *tp_rfk;
1189
1190         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1191                 tp_rfk = tpacpi_rfkill_switches[i];
1192                 if (tp_rfk) {
1193                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1194                                                 blocked)) {
1195                                 /* ignore -- we track sw block */
1196                         }
1197                 }
1198         }
1199 }
1200
1201 /* Call to get the WLSW state from the firmware */
1202 static int hotkey_get_wlsw(void);
1203
1204 /* Call to query WLSW state and update all rfkill switches */
1205 static bool tpacpi_rfk_check_hwblock_state(void)
1206 {
1207         int res = hotkey_get_wlsw();
1208         int hw_blocked;
1209
1210         /* When unknown or unsupported, we have to assume it is unblocked */
1211         if (res < 0)
1212                 return false;
1213
1214         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1215         tpacpi_rfk_update_hwblock_state(hw_blocked);
1216
1217         return hw_blocked;
1218 }
1219
1220 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1221 {
1222         struct tpacpi_rfk *tp_rfk = data;
1223         int res;
1224
1225         dbg_printk(TPACPI_DBG_RFKILL,
1226                    "request to change radio state to %s\n",
1227                    blocked ? "blocked" : "unblocked");
1228
1229         /* try to set radio state */
1230         res = (tp_rfk->ops->set_status)(blocked ?
1231                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1232
1233         /* and update the rfkill core with whatever the FW really did */
1234         tpacpi_rfk_update_swstate(tp_rfk);
1235
1236         return (res < 0) ? res : 0;
1237 }
1238
1239 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1240         .set_block = tpacpi_rfk_hook_set_block,
1241 };
1242
1243 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1244                         const struct tpacpi_rfk_ops *tp_rfkops,
1245                         const enum rfkill_type rfktype,
1246                         const char *name,
1247                         const bool set_default)
1248 {
1249         struct tpacpi_rfk *atp_rfk;
1250         int res;
1251         bool sw_state = false;
1252         bool hw_state;
1253         int sw_status;
1254
1255         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1256
1257         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1258         if (atp_rfk)
1259                 atp_rfk->rfkill = rfkill_alloc(name,
1260                                                 &tpacpi_pdev->dev,
1261                                                 rfktype,
1262                                                 &tpacpi_rfk_rfkill_ops,
1263                                                 atp_rfk);
1264         if (!atp_rfk || !atp_rfk->rfkill) {
1265                 pr_err("failed to allocate memory for rfkill class\n");
1266                 kfree(atp_rfk);
1267                 return -ENOMEM;
1268         }
1269
1270         atp_rfk->id = id;
1271         atp_rfk->ops = tp_rfkops;
1272
1273         sw_status = (tp_rfkops->get_status)();
1274         if (sw_status < 0) {
1275                 pr_err("failed to read initial state for %s, error %d\n",
1276                        name, sw_status);
1277         } else {
1278                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1279                 if (set_default) {
1280                         /* try to keep the initial state, since we ask the
1281                          * firmware to preserve it across S5 in NVRAM */
1282                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1283                 }
1284         }
1285         hw_state = tpacpi_rfk_check_hwblock_state();
1286         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1287
1288         res = rfkill_register(atp_rfk->rfkill);
1289         if (res < 0) {
1290                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1291                 rfkill_destroy(atp_rfk->rfkill);
1292                 kfree(atp_rfk);
1293                 return res;
1294         }
1295
1296         tpacpi_rfkill_switches[id] = atp_rfk;
1297
1298         pr_info("rfkill switch %s: radio is %sblocked\n",
1299                 name, (sw_state || hw_state) ? "" : "un");
1300         return 0;
1301 }
1302
1303 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1304 {
1305         struct tpacpi_rfk *tp_rfk;
1306
1307         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1308
1309         tp_rfk = tpacpi_rfkill_switches[id];
1310         if (tp_rfk) {
1311                 rfkill_unregister(tp_rfk->rfkill);
1312                 rfkill_destroy(tp_rfk->rfkill);
1313                 tpacpi_rfkill_switches[id] = NULL;
1314                 kfree(tp_rfk);
1315         }
1316 }
1317
1318 static void printk_deprecated_rfkill_attribute(const char * const what)
1319 {
1320         printk_deprecated_attribute(what,
1321                         "Please switch to generic rfkill before year 2010");
1322 }
1323
1324 /* sysfs <radio> enable ------------------------------------------------ */
1325 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1326                                             struct device_attribute *attr,
1327                                             char *buf)
1328 {
1329         int status;
1330
1331         printk_deprecated_rfkill_attribute(attr->attr.name);
1332
1333         /* This is in the ABI... */
1334         if (tpacpi_rfk_check_hwblock_state()) {
1335                 status = TPACPI_RFK_RADIO_OFF;
1336         } else {
1337                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1338                 if (status < 0)
1339                         return status;
1340         }
1341
1342         return snprintf(buf, PAGE_SIZE, "%d\n",
1343                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1344 }
1345
1346 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1347                             struct device_attribute *attr,
1348                             const char *buf, size_t count)
1349 {
1350         unsigned long t;
1351         int res;
1352
1353         printk_deprecated_rfkill_attribute(attr->attr.name);
1354
1355         if (parse_strtoul(buf, 1, &t))
1356                 return -EINVAL;
1357
1358         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1359
1360         /* This is in the ABI... */
1361         if (tpacpi_rfk_check_hwblock_state() && !!t)
1362                 return -EPERM;
1363
1364         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1365                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1366         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1367
1368         return (res < 0) ? res : count;
1369 }
1370
1371 /* procfs -------------------------------------------------------------- */
1372 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1373 {
1374         if (id >= TPACPI_RFK_SW_MAX)
1375                 seq_printf(m, "status:\t\tnot supported\n");
1376         else {
1377                 int status;
1378
1379                 /* This is in the ABI... */
1380                 if (tpacpi_rfk_check_hwblock_state()) {
1381                         status = TPACPI_RFK_RADIO_OFF;
1382                 } else {
1383                         status = tpacpi_rfk_update_swstate(
1384                                                 tpacpi_rfkill_switches[id]);
1385                         if (status < 0)
1386                                 return status;
1387                 }
1388
1389                 seq_printf(m, "status:\t\t%s\n",
1390                                 (status == TPACPI_RFK_RADIO_ON) ?
1391                                         "enabled" : "disabled");
1392                 seq_printf(m, "commands:\tenable, disable\n");
1393         }
1394
1395         return 0;
1396 }
1397
1398 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1399 {
1400         char *cmd;
1401         int status = -1;
1402         int res = 0;
1403
1404         if (id >= TPACPI_RFK_SW_MAX)
1405                 return -ENODEV;
1406
1407         while ((cmd = next_cmd(&buf))) {
1408                 if (strlencmp(cmd, "enable") == 0)
1409                         status = TPACPI_RFK_RADIO_ON;
1410                 else if (strlencmp(cmd, "disable") == 0)
1411                         status = TPACPI_RFK_RADIO_OFF;
1412                 else
1413                         return -EINVAL;
1414         }
1415
1416         if (status != -1) {
1417                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1418                                 (status == TPACPI_RFK_RADIO_ON) ?
1419                                                 "enable" : "disable",
1420                                 tpacpi_rfkill_names[id]);
1421                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1422                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1423         }
1424
1425         return res;
1426 }
1427
1428 /*************************************************************************
1429  * thinkpad-acpi driver attributes
1430  */
1431
1432 /* interface_version --------------------------------------------------- */
1433 static ssize_t tpacpi_driver_interface_version_show(
1434                                 struct device_driver *drv,
1435                                 char *buf)
1436 {
1437         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1438 }
1439
1440 static DRIVER_ATTR(interface_version, S_IRUGO,
1441                 tpacpi_driver_interface_version_show, NULL);
1442
1443 /* debug_level --------------------------------------------------------- */
1444 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1445                                                 char *buf)
1446 {
1447         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1448 }
1449
1450 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1451                                                 const char *buf, size_t count)
1452 {
1453         unsigned long t;
1454
1455         if (parse_strtoul(buf, 0xffff, &t))
1456                 return -EINVAL;
1457
1458         dbg_level = t;
1459
1460         return count;
1461 }
1462
1463 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1464                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1465
1466 /* version ------------------------------------------------------------- */
1467 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1468                                                 char *buf)
1469 {
1470         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1471                         TPACPI_DESC, TPACPI_VERSION);
1472 }
1473
1474 static DRIVER_ATTR(version, S_IRUGO,
1475                 tpacpi_driver_version_show, NULL);
1476
1477 /* --------------------------------------------------------------------- */
1478
1479 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1480
1481 /* wlsw_emulstate ------------------------------------------------------ */
1482 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1483                                                 char *buf)
1484 {
1485         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1486 }
1487
1488 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1489                                                 const char *buf, size_t count)
1490 {
1491         unsigned long t;
1492
1493         if (parse_strtoul(buf, 1, &t))
1494                 return -EINVAL;
1495
1496         if (tpacpi_wlsw_emulstate != !!t) {
1497                 tpacpi_wlsw_emulstate = !!t;
1498                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1499         }
1500
1501         return count;
1502 }
1503
1504 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1505                 tpacpi_driver_wlsw_emulstate_show,
1506                 tpacpi_driver_wlsw_emulstate_store);
1507
1508 /* bluetooth_emulstate ------------------------------------------------- */
1509 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1510                                         struct device_driver *drv,
1511                                         char *buf)
1512 {
1513         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1514 }
1515
1516 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1517                                         struct device_driver *drv,
1518                                         const char *buf, size_t count)
1519 {
1520         unsigned long t;
1521
1522         if (parse_strtoul(buf, 1, &t))
1523                 return -EINVAL;
1524
1525         tpacpi_bluetooth_emulstate = !!t;
1526
1527         return count;
1528 }
1529
1530 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1531                 tpacpi_driver_bluetooth_emulstate_show,
1532                 tpacpi_driver_bluetooth_emulstate_store);
1533
1534 /* wwan_emulstate ------------------------------------------------- */
1535 static ssize_t tpacpi_driver_wwan_emulstate_show(
1536                                         struct device_driver *drv,
1537                                         char *buf)
1538 {
1539         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1540 }
1541
1542 static ssize_t tpacpi_driver_wwan_emulstate_store(
1543                                         struct device_driver *drv,
1544                                         const char *buf, size_t count)
1545 {
1546         unsigned long t;
1547
1548         if (parse_strtoul(buf, 1, &t))
1549                 return -EINVAL;
1550
1551         tpacpi_wwan_emulstate = !!t;
1552
1553         return count;
1554 }
1555
1556 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1557                 tpacpi_driver_wwan_emulstate_show,
1558                 tpacpi_driver_wwan_emulstate_store);
1559
1560 /* uwb_emulstate ------------------------------------------------- */
1561 static ssize_t tpacpi_driver_uwb_emulstate_show(
1562                                         struct device_driver *drv,
1563                                         char *buf)
1564 {
1565         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1566 }
1567
1568 static ssize_t tpacpi_driver_uwb_emulstate_store(
1569                                         struct device_driver *drv,
1570                                         const char *buf, size_t count)
1571 {
1572         unsigned long t;
1573
1574         if (parse_strtoul(buf, 1, &t))
1575                 return -EINVAL;
1576
1577         tpacpi_uwb_emulstate = !!t;
1578
1579         return count;
1580 }
1581
1582 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1583                 tpacpi_driver_uwb_emulstate_show,
1584                 tpacpi_driver_uwb_emulstate_store);
1585 #endif
1586
1587 /* --------------------------------------------------------------------- */
1588
1589 static struct driver_attribute *tpacpi_driver_attributes[] = {
1590         &driver_attr_debug_level, &driver_attr_version,
1591         &driver_attr_interface_version,
1592 };
1593
1594 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1595 {
1596         int i, res;
1597
1598         i = 0;
1599         res = 0;
1600         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1601                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1602                 i++;
1603         }
1604
1605 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1606         if (!res && dbg_wlswemul)
1607                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1608         if (!res && dbg_bluetoothemul)
1609                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1610         if (!res && dbg_wwanemul)
1611                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1612         if (!res && dbg_uwbemul)
1613                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1614 #endif
1615
1616         return res;
1617 }
1618
1619 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1620 {
1621         int i;
1622
1623         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1624                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1625
1626 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1627         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1628         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1629         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1630         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1631 #endif
1632 }
1633
1634 /*************************************************************************
1635  * Firmware Data
1636  */
1637
1638 /*
1639  * Table of recommended minimum BIOS versions
1640  *
1641  * Reasons for listing:
1642  *    1. Stable BIOS, listed because the unknown amount of
1643  *       bugs and bad ACPI behaviour on older versions
1644  *
1645  *    2. BIOS or EC fw with known bugs that trigger on Linux
1646  *
1647  *    3. BIOS with known reduced functionality in older versions
1648  *
1649  *  We recommend the latest BIOS and EC version.
1650  *  We only support the latest BIOS and EC fw version as a rule.
1651  *
1652  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1653  *  Information from users in ThinkWiki
1654  *
1655  *  WARNING: we use this table also to detect that the machine is
1656  *  a ThinkPad in some cases, so don't remove entries lightly.
1657  */
1658
1659 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1660         { .vendor       = (__v),                        \
1661           .bios         = TPID(__id1, __id2),           \
1662           .ec           = TPACPI_MATCH_ANY,             \
1663           .quirks       = TPACPI_MATCH_ANY << 16        \
1664                           | (__bv1) << 8 | (__bv2) }
1665
1666 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1667                 __eid, __ev1, __ev2)                    \
1668         { .vendor       = (__v),                        \
1669           .bios         = TPID(__bid1, __bid2),         \
1670           .ec           = __eid,                        \
1671           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1672                           | (__bv1) << 8 | (__bv2) }
1673
1674 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1675         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1676
1677 /* Outdated IBM BIOSes often lack the EC id string */
1678 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1679         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1680                 __bv1, __bv2, TPID(__id1, __id2),       \
1681                 __ev1, __ev2),                          \
1682         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1683                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1684                 __ev1, __ev2)
1685
1686 /* Outdated IBM BIOSes often lack the EC id string */
1687 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1688                 __eid1, __eid2, __ev1, __ev2)           \
1689         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1690                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1691                 __ev1, __ev2),                          \
1692         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1693                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1694                 __ev1, __ev2)
1695
1696 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1697         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1698
1699 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1700         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1701                 __bv1, __bv2, TPID(__id1, __id2),       \
1702                 __ev1, __ev2)
1703
1704 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1705                 __eid1, __eid2, __ev1, __ev2)           \
1706         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1707                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1708                 __ev1, __ev2)
1709
1710 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1711         /*  Numeric models ------------------ */
1712         /*      FW MODEL   BIOS VERS          */
1713         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1714         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1715         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1716         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1717         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1718         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1719         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1720         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1721         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1722
1723         /* A-series ------------------------- */
1724         /*      FW MODEL   BIOS VERS  EC VERS */
1725         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1726         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1727         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1728         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1729         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1730         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1731         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1732         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1733         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1734         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1735         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1736
1737         /* G-series ------------------------- */
1738         /*      FW MODEL   BIOS VERS          */
1739         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1740         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1741
1742         /* R-series, T-series --------------- */
1743         /*      FW MODEL   BIOS VERS  EC VERS */
1744         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1745         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1746         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1747         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1748         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1749         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1750         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1751                                                     T40/p, T41/p, T42/p (1) */
1752         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1753         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1754         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1755         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1756
1757         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1758         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1759         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1760         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1761         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1762         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1763
1764         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1765         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1766         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1767
1768         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1769         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1770         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1771
1772         /* X-series ------------------------- */
1773         /*      FW MODEL   BIOS VERS  EC VERS */
1774         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1775         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1776         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1777         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1778         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1779         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1780         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1781
1782         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1783         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1784
1785         /* (0) - older versions lack DMI EC fw string and functionality */
1786         /* (1) - older versions known to lack functionality */
1787 };
1788
1789 #undef TPV_QL1
1790 #undef TPV_QL0
1791 #undef TPV_QI2
1792 #undef TPV_QI1
1793 #undef TPV_QI0
1794 #undef TPV_Q_X
1795 #undef TPV_Q
1796
1797 static void __init tpacpi_check_outdated_fw(void)
1798 {
1799         unsigned long fwvers;
1800         u16 ec_version, bios_version;
1801
1802         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1803                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1804
1805         if (!fwvers)
1806                 return;
1807
1808         bios_version = fwvers & 0xffffU;
1809         ec_version = (fwvers >> 16) & 0xffffU;
1810
1811         /* note that unknown versions are set to 0x0000 and we use that */
1812         if ((bios_version > thinkpad_id.bios_release) ||
1813             (ec_version > thinkpad_id.ec_release &&
1814                                 ec_version != TPACPI_MATCH_ANY)) {
1815                 /*
1816                  * The changelogs would let us track down the exact
1817                  * reason, but it is just too much of a pain to track
1818                  * it.  We only list BIOSes that are either really
1819                  * broken, or really stable to begin with, so it is
1820                  * best if the user upgrades the firmware anyway.
1821                  */
1822                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1823                 pr_warn("WARNING: This firmware may be missing critical bug "
1824                         "fixes and/or important features\n");
1825         }
1826 }
1827
1828 static bool __init tpacpi_is_fw_known(void)
1829 {
1830         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1831                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1832 }
1833
1834 /****************************************************************************
1835  ****************************************************************************
1836  *
1837  * Subdrivers
1838  *
1839  ****************************************************************************
1840  ****************************************************************************/
1841
1842 /*************************************************************************
1843  * thinkpad-acpi metadata subdriver
1844  */
1845
1846 static int thinkpad_acpi_driver_read(struct seq_file *m)
1847 {
1848         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1849         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1850         return 0;
1851 }
1852
1853 static struct ibm_struct thinkpad_acpi_driver_data = {
1854         .name = "driver",
1855         .read = thinkpad_acpi_driver_read,
1856 };
1857
1858 /*************************************************************************
1859  * Hotkey subdriver
1860  */
1861
1862 /*
1863  * ThinkPad firmware event model
1864  *
1865  * The ThinkPad firmware has two main event interfaces: normal ACPI
1866  * notifications (which follow the ACPI standard), and a private event
1867  * interface.
1868  *
1869  * The private event interface also issues events for the hotkeys.  As
1870  * the driver gained features, the event handling code ended up being
1871  * built around the hotkey subdriver.  This will need to be refactored
1872  * to a more formal event API eventually.
1873  *
1874  * Some "hotkeys" are actually supposed to be used as event reports,
1875  * such as "brightness has changed", "volume has changed", depending on
1876  * the ThinkPad model and how the firmware is operating.
1877  *
1878  * Unlike other classes, hotkey-class events have mask/unmask control on
1879  * non-ancient firmware.  However, how it behaves changes a lot with the
1880  * firmware model and version.
1881  */
1882
1883 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1884         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1885         TP_ACPI_HOTKEYSCAN_FNF2,
1886         TP_ACPI_HOTKEYSCAN_FNF3,
1887         TP_ACPI_HOTKEYSCAN_FNF4,
1888         TP_ACPI_HOTKEYSCAN_FNF5,
1889         TP_ACPI_HOTKEYSCAN_FNF6,
1890         TP_ACPI_HOTKEYSCAN_FNF7,
1891         TP_ACPI_HOTKEYSCAN_FNF8,
1892         TP_ACPI_HOTKEYSCAN_FNF9,
1893         TP_ACPI_HOTKEYSCAN_FNF10,
1894         TP_ACPI_HOTKEYSCAN_FNF11,
1895         TP_ACPI_HOTKEYSCAN_FNF12,
1896         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1897         TP_ACPI_HOTKEYSCAN_FNINSERT,
1898         TP_ACPI_HOTKEYSCAN_FNDELETE,
1899         TP_ACPI_HOTKEYSCAN_FNHOME,
1900         TP_ACPI_HOTKEYSCAN_FNEND,
1901         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1902         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1903         TP_ACPI_HOTKEYSCAN_FNSPACE,
1904         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1905         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1906         TP_ACPI_HOTKEYSCAN_MUTE,
1907         TP_ACPI_HOTKEYSCAN_THINKPAD,
1908         TP_ACPI_HOTKEYSCAN_UNK1,
1909         TP_ACPI_HOTKEYSCAN_UNK2,
1910         TP_ACPI_HOTKEYSCAN_UNK3,
1911         TP_ACPI_HOTKEYSCAN_UNK4,
1912         TP_ACPI_HOTKEYSCAN_UNK5,
1913         TP_ACPI_HOTKEYSCAN_UNK6,
1914         TP_ACPI_HOTKEYSCAN_UNK7,
1915         TP_ACPI_HOTKEYSCAN_UNK8,
1916
1917         TP_ACPI_HOTKEYSCAN_MUTE2,
1918         TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1919         TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1920         TP_ACPI_HOTKEYSCAN_CLOUD,
1921         TP_ACPI_HOTKEYSCAN_UNK9,
1922         TP_ACPI_HOTKEYSCAN_VOICE,
1923         TP_ACPI_HOTKEYSCAN_UNK10,
1924         TP_ACPI_HOTKEYSCAN_GESTURES,
1925         TP_ACPI_HOTKEYSCAN_UNK11,
1926         TP_ACPI_HOTKEYSCAN_UNK12,
1927         TP_ACPI_HOTKEYSCAN_UNK13,
1928         TP_ACPI_HOTKEYSCAN_CONFIG,
1929         TP_ACPI_HOTKEYSCAN_NEW_TAB,
1930         TP_ACPI_HOTKEYSCAN_RELOAD,
1931         TP_ACPI_HOTKEYSCAN_BACK,
1932         TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1933         TP_ACPI_HOTKEYSCAN_MIC_UP,
1934         TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1935         TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1936         TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1937
1938         /* Hotkey keymap size */
1939         TPACPI_HOTKEY_MAP_LEN
1940 };
1941
1942 enum {  /* Keys/events available through NVRAM polling */
1943         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1944         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1945 };
1946
1947 enum {  /* Positions of some of the keys in hotkey masks */
1948         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1949         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1950         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1951         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1952         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1953         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1954         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1955         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1956         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1957         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1958         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1959 };
1960
1961 enum {  /* NVRAM to ACPI HKEY group map */
1962         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1963                                           TP_ACPI_HKEY_ZOOM_MASK |
1964                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1965                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1966         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1967                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1968         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1969                                           TP_ACPI_HKEY_VOLDWN_MASK |
1970                                           TP_ACPI_HKEY_MUTE_MASK,
1971 };
1972
1973 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1974 struct tp_nvram_state {
1975        u16 thinkpad_toggle:1;
1976        u16 zoom_toggle:1;
1977        u16 display_toggle:1;
1978        u16 thinklight_toggle:1;
1979        u16 hibernate_toggle:1;
1980        u16 displayexp_toggle:1;
1981        u16 display_state:1;
1982        u16 brightness_toggle:1;
1983        u16 volume_toggle:1;
1984        u16 mute:1;
1985
1986        u8 brightness_level;
1987        u8 volume_level;
1988 };
1989
1990 /* kthread for the hotkey poller */
1991 static struct task_struct *tpacpi_hotkey_task;
1992
1993 /*
1994  * Acquire mutex to write poller control variables as an
1995  * atomic block.
1996  *
1997  * Increment hotkey_config_change when changing them if you
1998  * want the kthread to forget old state.
1999  *
2000  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2001  */
2002 static struct mutex hotkey_thread_data_mutex;
2003 static unsigned int hotkey_config_change;
2004
2005 /*
2006  * hotkey poller control variables
2007  *
2008  * Must be atomic or readers will also need to acquire mutex
2009  *
2010  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2011  * should be used only when the changes need to be taken as
2012  * a block, OR when one needs to force the kthread to forget
2013  * old state.
2014  */
2015 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2016 static unsigned int hotkey_poll_freq = 10; /* Hz */
2017
2018 #define HOTKEY_CONFIG_CRITICAL_START \
2019         do { \
2020                 mutex_lock(&hotkey_thread_data_mutex); \
2021                 hotkey_config_change++; \
2022         } while (0);
2023 #define HOTKEY_CONFIG_CRITICAL_END \
2024         mutex_unlock(&hotkey_thread_data_mutex);
2025
2026 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2027
2028 #define hotkey_source_mask 0U
2029 #define HOTKEY_CONFIG_CRITICAL_START
2030 #define HOTKEY_CONFIG_CRITICAL_END
2031
2032 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2033
2034 static struct mutex hotkey_mutex;
2035
2036 static enum {   /* Reasons for waking up */
2037         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2038         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2039         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2040 } hotkey_wakeup_reason;
2041
2042 static int hotkey_autosleep_ack;
2043
2044 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2045 static u32 hotkey_all_mask;             /* all events supported in fw */
2046 static u32 hotkey_reserved_mask;        /* events better left disabled */
2047 static u32 hotkey_driver_mask;          /* events needed by the driver */
2048 static u32 hotkey_user_mask;            /* events visible to userspace */
2049 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2050
2051 static u16 *hotkey_keycode_map;
2052
2053 static struct attribute_set *hotkey_dev_attributes;
2054
2055 static void tpacpi_driver_event(const unsigned int hkey_event);
2056 static void hotkey_driver_event(const unsigned int scancode);
2057 static void hotkey_poll_setup(const bool may_warn);
2058
2059 /* HKEY.MHKG() return bits */
2060 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2061
2062 static int hotkey_get_wlsw(void)
2063 {
2064         int status;
2065
2066         if (!tp_features.hotkey_wlsw)
2067                 return -ENODEV;
2068
2069 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2070         if (dbg_wlswemul)
2071                 return (tpacpi_wlsw_emulstate) ?
2072                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2073 #endif
2074
2075         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2076                 return -EIO;
2077
2078         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2079 }
2080
2081 static int hotkey_get_tablet_mode(int *status)
2082 {
2083         int s;
2084
2085         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2086                 return -EIO;
2087
2088         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2089         return 0;
2090 }
2091
2092 /*
2093  * Reads current event mask from firmware, and updates
2094  * hotkey_acpi_mask accordingly.  Also resets any bits
2095  * from hotkey_user_mask that are unavailable to be
2096  * delivered (shadow requirement of the userspace ABI).
2097  *
2098  * Call with hotkey_mutex held
2099  */
2100 static int hotkey_mask_get(void)
2101 {
2102         if (tp_features.hotkey_mask) {
2103                 u32 m = 0;
2104
2105                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2106                         return -EIO;
2107
2108                 hotkey_acpi_mask = m;
2109         } else {
2110                 /* no mask support doesn't mean no event support... */
2111                 hotkey_acpi_mask = hotkey_all_mask;
2112         }
2113
2114         /* sync userspace-visible mask */
2115         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2116
2117         return 0;
2118 }
2119
2120 static void hotkey_mask_warn_incomplete_mask(void)
2121 {
2122         /* log only what the user can fix... */
2123         const u32 wantedmask = hotkey_driver_mask &
2124                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2125                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2126
2127         if (wantedmask)
2128                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2129 }
2130
2131 /*
2132  * Set the firmware mask when supported
2133  *
2134  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2135  *
2136  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2137  *
2138  * Call with hotkey_mutex held
2139  */
2140 static int hotkey_mask_set(u32 mask)
2141 {
2142         int i;
2143         int rc = 0;
2144
2145         const u32 fwmask = mask & ~hotkey_source_mask;
2146
2147         if (tp_features.hotkey_mask) {
2148                 for (i = 0; i < 32; i++) {
2149                         if (!acpi_evalf(hkey_handle,
2150                                         NULL, "MHKM", "vdd", i + 1,
2151                                         !!(mask & (1 << i)))) {
2152                                 rc = -EIO;
2153                                 break;
2154                         }
2155                 }
2156         }
2157
2158         /*
2159          * We *must* make an inconditional call to hotkey_mask_get to
2160          * refresh hotkey_acpi_mask and update hotkey_user_mask
2161          *
2162          * Take the opportunity to also log when we cannot _enable_
2163          * a given event.
2164          */
2165         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2166                 pr_notice("asked for hotkey mask 0x%08x, but "
2167                           "firmware forced it to 0x%08x\n",
2168                           fwmask, hotkey_acpi_mask);
2169         }
2170
2171         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2172                 hotkey_mask_warn_incomplete_mask();
2173
2174         return rc;
2175 }
2176
2177 /*
2178  * Sets hotkey_user_mask and tries to set the firmware mask
2179  *
2180  * Call with hotkey_mutex held
2181  */
2182 static int hotkey_user_mask_set(const u32 mask)
2183 {
2184         int rc;
2185
2186         /* Give people a chance to notice they are doing something that
2187          * is bound to go boom on their users sooner or later */
2188         if (!tp_warned.hotkey_mask_ff &&
2189             (mask == 0xffff || mask == 0xffffff ||
2190              mask == 0xffffffff)) {
2191                 tp_warned.hotkey_mask_ff = 1;
2192                 pr_notice("setting the hotkey mask to 0x%08x is likely "
2193                           "not the best way to go about it\n", mask);
2194                 pr_notice("please consider using the driver defaults, "
2195                           "and refer to up-to-date thinkpad-acpi "
2196                           "documentation\n");
2197         }
2198
2199         /* Try to enable what the user asked for, plus whatever we need.
2200          * this syncs everything but won't enable bits in hotkey_user_mask */
2201         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2202
2203         /* Enable the available bits in hotkey_user_mask */
2204         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2205
2206         return rc;
2207 }
2208
2209 /*
2210  * Sets the driver hotkey mask.
2211  *
2212  * Can be called even if the hotkey subdriver is inactive
2213  */
2214 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2215 {
2216         int rc;
2217
2218         /* Do the right thing if hotkey_init has not been called yet */
2219         if (!tp_features.hotkey) {
2220                 hotkey_driver_mask = mask;
2221                 return 0;
2222         }
2223
2224         mutex_lock(&hotkey_mutex);
2225
2226         HOTKEY_CONFIG_CRITICAL_START
2227         hotkey_driver_mask = mask;
2228 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2229         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2230 #endif
2231         HOTKEY_CONFIG_CRITICAL_END
2232
2233         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2234                                                         ~hotkey_source_mask);
2235         hotkey_poll_setup(true);
2236
2237         mutex_unlock(&hotkey_mutex);
2238
2239         return rc;
2240 }
2241
2242 static int hotkey_status_get(int *status)
2243 {
2244         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2245                 return -EIO;
2246
2247         return 0;
2248 }
2249
2250 static int hotkey_status_set(bool enable)
2251 {
2252         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2253                 return -EIO;
2254
2255         return 0;
2256 }
2257
2258 static void tpacpi_input_send_tabletsw(void)
2259 {
2260         int state;
2261
2262         if (tp_features.hotkey_tablet &&
2263             !hotkey_get_tablet_mode(&state)) {
2264                 mutex_lock(&tpacpi_inputdev_send_mutex);
2265
2266                 input_report_switch(tpacpi_inputdev,
2267                                     SW_TABLET_MODE, !!state);
2268                 input_sync(tpacpi_inputdev);
2269
2270                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2271         }
2272 }
2273
2274 /* Do NOT call without validating scancode first */
2275 static void tpacpi_input_send_key(const unsigned int scancode)
2276 {
2277         const unsigned int keycode = hotkey_keycode_map[scancode];
2278
2279         if (keycode != KEY_RESERVED) {
2280                 mutex_lock(&tpacpi_inputdev_send_mutex);
2281
2282                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2283                 input_report_key(tpacpi_inputdev, keycode, 1);
2284                 input_sync(tpacpi_inputdev);
2285
2286                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2287                 input_report_key(tpacpi_inputdev, keycode, 0);
2288                 input_sync(tpacpi_inputdev);
2289
2290                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2291         }
2292 }
2293
2294 /* Do NOT call without validating scancode first */
2295 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2296 {
2297         hotkey_driver_event(scancode);
2298         if (hotkey_user_mask & (1 << scancode))
2299                 tpacpi_input_send_key(scancode);
2300 }
2301
2302 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2303 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2304
2305 /* Do NOT call without validating scancode first */
2306 static void tpacpi_hotkey_send_key(unsigned int scancode)
2307 {
2308         tpacpi_input_send_key_masked(scancode);
2309 }
2310
2311 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2312 {
2313         u8 d;
2314
2315         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2316                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2317                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2318                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2319                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2320                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2321         }
2322         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2323                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2324                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2325         }
2326         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2327                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2328                 n->displayexp_toggle =
2329                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2330         }
2331         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2332                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2333                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2334                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2335                 n->brightness_toggle =
2336                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2337         }
2338         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2339                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2340                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2341                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2342                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2343                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2344         }
2345 }
2346
2347 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2348 do { \
2349         if ((event_mask & (1 << __scancode)) && \
2350             oldn->__member != newn->__member) \
2351                 tpacpi_hotkey_send_key(__scancode); \
2352 } while (0)
2353
2354 #define TPACPI_MAY_SEND_KEY(__scancode) \
2355 do { \
2356         if (event_mask & (1 << __scancode)) \
2357                 tpacpi_hotkey_send_key(__scancode); \
2358 } while (0)
2359
2360 static void issue_volchange(const unsigned int oldvol,
2361                             const unsigned int newvol,
2362                             const u32 event_mask)
2363 {
2364         unsigned int i = oldvol;
2365
2366         while (i > newvol) {
2367                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2368                 i--;
2369         }
2370         while (i < newvol) {
2371                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2372                 i++;
2373         }
2374 }
2375
2376 static void issue_brightnesschange(const unsigned int oldbrt,
2377                                    const unsigned int newbrt,
2378                                    const u32 event_mask)
2379 {
2380         unsigned int i = oldbrt;
2381
2382         while (i > newbrt) {
2383                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2384                 i--;
2385         }
2386         while (i < newbrt) {
2387                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2388                 i++;
2389         }
2390 }
2391
2392 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2393                                            struct tp_nvram_state *newn,
2394                                            const u32 event_mask)
2395 {
2396
2397         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2398         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2399         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2400         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2401
2402         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2403
2404         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2405
2406         /*
2407          * Handle volume
2408          *
2409          * This code is supposed to duplicate the IBM firmware behaviour:
2410          * - Pressing MUTE issues mute hotkey message, even when already mute
2411          * - Pressing Volume up/down issues volume up/down hotkey messages,
2412          *   even when already at maximum or minimum volume
2413          * - The act of unmuting issues volume up/down notification,
2414          *   depending which key was used to unmute
2415          *
2416          * We are constrained to what the NVRAM can tell us, which is not much
2417          * and certainly not enough if more than one volume hotkey was pressed
2418          * since the last poll cycle.
2419          *
2420          * Just to make our life interesting, some newer Lenovo ThinkPads have
2421          * bugs in the BIOS and may fail to update volume_toggle properly.
2422          */
2423         if (newn->mute) {
2424                 /* muted */
2425                 if (!oldn->mute ||
2426                     oldn->volume_toggle != newn->volume_toggle ||
2427                     oldn->volume_level != newn->volume_level) {
2428                         /* recently muted, or repeated mute keypress, or
2429                          * multiple presses ending in mute */
2430                         issue_volchange(oldn->volume_level, newn->volume_level,
2431                                 event_mask);
2432                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2433                 }
2434         } else {
2435                 /* unmute */
2436                 if (oldn->mute) {
2437                         /* recently unmuted, issue 'unmute' keypress */
2438                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2439                 }
2440                 if (oldn->volume_level != newn->volume_level) {
2441                         issue_volchange(oldn->volume_level, newn->volume_level,
2442                                 event_mask);
2443                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2444                         /* repeated vol up/down keypress at end of scale ? */
2445                         if (newn->volume_level == 0)
2446                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2447                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2448                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2449                 }
2450         }
2451
2452         /* handle brightness */
2453         if (oldn->brightness_level != newn->brightness_level) {
2454                 issue_brightnesschange(oldn->brightness_level,
2455                                        newn->brightness_level, event_mask);
2456         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2457                 /* repeated key presses that didn't change state */
2458                 if (newn->brightness_level == 0)
2459                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2460                 else if (newn->brightness_level >= bright_maxlvl
2461                                 && !tp_features.bright_unkfw)
2462                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2463         }
2464
2465 #undef TPACPI_COMPARE_KEY
2466 #undef TPACPI_MAY_SEND_KEY
2467 }
2468
2469 /*
2470  * Polling driver
2471  *
2472  * We track all events in hotkey_source_mask all the time, since
2473  * most of them are edge-based.  We only issue those requested by
2474  * hotkey_user_mask or hotkey_driver_mask, though.
2475  */
2476 static int hotkey_kthread(void *data)
2477 {
2478         struct tp_nvram_state s[2];
2479         u32 poll_mask, event_mask;
2480         unsigned int si, so;
2481         unsigned long t;
2482         unsigned int change_detector;
2483         unsigned int poll_freq;
2484         bool was_frozen;
2485
2486         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2487                 goto exit;
2488
2489         set_freezable();
2490
2491         so = 0;
2492         si = 1;
2493         t = 0;
2494
2495         /* Initial state for compares */
2496         mutex_lock(&hotkey_thread_data_mutex);
2497         change_detector = hotkey_config_change;
2498         poll_mask = hotkey_source_mask;
2499         event_mask = hotkey_source_mask &
2500                         (hotkey_driver_mask | hotkey_user_mask);
2501         poll_freq = hotkey_poll_freq;
2502         mutex_unlock(&hotkey_thread_data_mutex);
2503         hotkey_read_nvram(&s[so], poll_mask);
2504
2505         while (!kthread_should_stop()) {
2506                 if (t == 0) {
2507                         if (likely(poll_freq))
2508                                 t = 1000/poll_freq;
2509                         else
2510                                 t = 100;        /* should never happen... */
2511                 }
2512                 t = msleep_interruptible(t);
2513                 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2514                         break;
2515
2516                 if (t > 0 && !was_frozen)
2517                         continue;
2518
2519                 mutex_lock(&hotkey_thread_data_mutex);
2520                 if (was_frozen || hotkey_config_change != change_detector) {
2521                         /* forget old state on thaw or config change */
2522                         si = so;
2523                         t = 0;
2524                         change_detector = hotkey_config_change;
2525                 }
2526                 poll_mask = hotkey_source_mask;
2527                 event_mask = hotkey_source_mask &
2528                                 (hotkey_driver_mask | hotkey_user_mask);
2529                 poll_freq = hotkey_poll_freq;
2530                 mutex_unlock(&hotkey_thread_data_mutex);
2531
2532                 if (likely(poll_mask)) {
2533                         hotkey_read_nvram(&s[si], poll_mask);
2534                         if (likely(si != so)) {
2535                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2536                                                                 event_mask);
2537                         }
2538                 }
2539
2540                 so = si;
2541                 si ^= 1;
2542         }
2543
2544 exit:
2545         return 0;
2546 }
2547
2548 /* call with hotkey_mutex held */
2549 static void hotkey_poll_stop_sync(void)
2550 {
2551         if (tpacpi_hotkey_task) {
2552                 kthread_stop(tpacpi_hotkey_task);
2553                 tpacpi_hotkey_task = NULL;
2554         }
2555 }
2556
2557 /* call with hotkey_mutex held */
2558 static void hotkey_poll_setup(const bool may_warn)
2559 {
2560         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2561         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2562
2563         if (hotkey_poll_freq > 0 &&
2564             (poll_driver_mask ||
2565              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2566                 if (!tpacpi_hotkey_task) {
2567                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2568                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2569                         if (IS_ERR(tpacpi_hotkey_task)) {
2570                                 tpacpi_hotkey_task = NULL;
2571                                 pr_err("could not create kernel thread "
2572                                        "for hotkey polling\n");
2573                         }
2574                 }
2575         } else {
2576                 hotkey_poll_stop_sync();
2577                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2578                     hotkey_poll_freq == 0) {
2579                         pr_notice("hot keys 0x%08x and/or events 0x%08x "
2580                                   "require polling, which is currently "
2581                                   "disabled\n",
2582                                   poll_user_mask, poll_driver_mask);
2583                 }
2584         }
2585 }
2586
2587 static void hotkey_poll_setup_safe(const bool may_warn)
2588 {
2589         mutex_lock(&hotkey_mutex);
2590         hotkey_poll_setup(may_warn);
2591         mutex_unlock(&hotkey_mutex);
2592 }
2593
2594 /* call with hotkey_mutex held */
2595 static void hotkey_poll_set_freq(unsigned int freq)
2596 {
2597         if (!freq)
2598                 hotkey_poll_stop_sync();
2599
2600         hotkey_poll_freq = freq;
2601 }
2602
2603 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2604
2605 static void hotkey_poll_setup(const bool __unused)
2606 {
2607 }
2608
2609 static void hotkey_poll_setup_safe(const bool __unused)
2610 {
2611 }
2612
2613 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2614
2615 static int hotkey_inputdev_open(struct input_dev *dev)
2616 {
2617         switch (tpacpi_lifecycle) {
2618         case TPACPI_LIFE_INIT:
2619         case TPACPI_LIFE_RUNNING:
2620                 hotkey_poll_setup_safe(false);
2621                 return 0;
2622         case TPACPI_LIFE_EXITING:
2623                 return -EBUSY;
2624         }
2625
2626         /* Should only happen if tpacpi_lifecycle is corrupt */
2627         BUG();
2628         return -EBUSY;
2629 }
2630
2631 static void hotkey_inputdev_close(struct input_dev *dev)
2632 {
2633         /* disable hotkey polling when possible */
2634         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2635             !(hotkey_source_mask & hotkey_driver_mask))
2636                 hotkey_poll_setup_safe(false);
2637 }
2638
2639 /* sysfs hotkey enable ------------------------------------------------- */
2640 static ssize_t hotkey_enable_show(struct device *dev,
2641                            struct device_attribute *attr,
2642                            char *buf)
2643 {
2644         int res, status;
2645
2646         printk_deprecated_attribute("hotkey_enable",
2647                         "Hotkey reporting is always enabled");
2648
2649         res = hotkey_status_get(&status);
2650         if (res)
2651                 return res;
2652
2653         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2654 }
2655
2656 static ssize_t hotkey_enable_store(struct device *dev,
2657                             struct device_attribute *attr,
2658                             const char *buf, size_t count)
2659 {
2660         unsigned long t;
2661
2662         printk_deprecated_attribute("hotkey_enable",
2663                         "Hotkeys can be disabled through hotkey_mask");
2664
2665         if (parse_strtoul(buf, 1, &t))
2666                 return -EINVAL;
2667
2668         if (t == 0)
2669                 return -EPERM;
2670
2671         return count;
2672 }
2673
2674 static DEVICE_ATTR_RW(hotkey_enable);
2675
2676 /* sysfs hotkey mask --------------------------------------------------- */
2677 static ssize_t hotkey_mask_show(struct device *dev,
2678                            struct device_attribute *attr,
2679                            char *buf)
2680 {
2681         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2682 }
2683
2684 static ssize_t hotkey_mask_store(struct device *dev,
2685                             struct device_attribute *attr,
2686                             const char *buf, size_t count)
2687 {
2688         unsigned long t;
2689         int res;
2690
2691         if (parse_strtoul(buf, 0xffffffffUL, &t))
2692                 return -EINVAL;
2693
2694         if (mutex_lock_killable(&hotkey_mutex))
2695                 return -ERESTARTSYS;
2696
2697         res = hotkey_user_mask_set(t);
2698
2699 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2700         hotkey_poll_setup(true);
2701 #endif
2702
2703         mutex_unlock(&hotkey_mutex);
2704
2705         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2706
2707         return (res) ? res : count;
2708 }
2709
2710 static DEVICE_ATTR_RW(hotkey_mask);
2711
2712 /* sysfs hotkey bios_enabled ------------------------------------------- */
2713 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2714                            struct device_attribute *attr,
2715                            char *buf)
2716 {
2717         return sprintf(buf, "0\n");
2718 }
2719
2720 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2721
2722 /* sysfs hotkey bios_mask ---------------------------------------------- */
2723 static ssize_t hotkey_bios_mask_show(struct device *dev,
2724                            struct device_attribute *attr,
2725                            char *buf)
2726 {
2727         printk_deprecated_attribute("hotkey_bios_mask",
2728                         "This attribute is useless.");
2729         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2730 }
2731
2732 static DEVICE_ATTR_RO(hotkey_bios_mask);
2733
2734 /* sysfs hotkey all_mask ----------------------------------------------- */
2735 static ssize_t hotkey_all_mask_show(struct device *dev,
2736                            struct device_attribute *attr,
2737                            char *buf)
2738 {
2739         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2740                                 hotkey_all_mask | hotkey_source_mask);
2741 }
2742
2743 static DEVICE_ATTR_RO(hotkey_all_mask);
2744
2745 /* sysfs hotkey recommended_mask --------------------------------------- */
2746 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2747                                             struct device_attribute *attr,
2748                                             char *buf)
2749 {
2750         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2751                         (hotkey_all_mask | hotkey_source_mask)
2752                         & ~hotkey_reserved_mask);
2753 }
2754
2755 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2756
2757 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2758
2759 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2760 static ssize_t hotkey_source_mask_show(struct device *dev,
2761                            struct device_attribute *attr,
2762                            char *buf)
2763 {
2764         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2765 }
2766
2767 static ssize_t hotkey_source_mask_store(struct device *dev,
2768                             struct device_attribute *attr,
2769                             const char *buf, size_t count)
2770 {
2771         unsigned long t;
2772         u32 r_ev;
2773         int rc;
2774
2775         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2776                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2777                 return -EINVAL;
2778
2779         if (mutex_lock_killable(&hotkey_mutex))
2780                 return -ERESTARTSYS;
2781
2782         HOTKEY_CONFIG_CRITICAL_START
2783         hotkey_source_mask = t;
2784         HOTKEY_CONFIG_CRITICAL_END
2785
2786         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2787                         ~hotkey_source_mask);
2788         hotkey_poll_setup(true);
2789
2790         /* check if events needed by the driver got disabled */
2791         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2792                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2793
2794         mutex_unlock(&hotkey_mutex);
2795
2796         if (rc < 0)
2797                 pr_err("hotkey_source_mask: "
2798                        "failed to update the firmware event mask!\n");
2799
2800         if (r_ev)
2801                 pr_notice("hotkey_source_mask: "
2802                           "some important events were disabled: 0x%04x\n",
2803                           r_ev);
2804
2805         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2806
2807         return (rc < 0) ? rc : count;
2808 }
2809
2810 static DEVICE_ATTR_RW(hotkey_source_mask);
2811
2812 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2813 static ssize_t hotkey_poll_freq_show(struct device *dev,
2814                            struct device_attribute *attr,
2815                            char *buf)
2816 {
2817         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2818 }
2819
2820 static ssize_t hotkey_poll_freq_store(struct device *dev,
2821                             struct device_attribute *attr,
2822                             const char *buf, size_t count)
2823 {
2824         unsigned long t;
2825
2826         if (parse_strtoul(buf, 25, &t))
2827                 return -EINVAL;
2828
2829         if (mutex_lock_killable(&hotkey_mutex))
2830                 return -ERESTARTSYS;
2831
2832         hotkey_poll_set_freq(t);
2833         hotkey_poll_setup(true);
2834
2835         mutex_unlock(&hotkey_mutex);
2836
2837         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2838
2839         return count;
2840 }
2841
2842 static DEVICE_ATTR_RW(hotkey_poll_freq);
2843
2844 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2845
2846 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2847 static ssize_t hotkey_radio_sw_show(struct device *dev,
2848                            struct device_attribute *attr,
2849                            char *buf)
2850 {
2851         int res;
2852         res = hotkey_get_wlsw();
2853         if (res < 0)
2854                 return res;
2855
2856         /* Opportunistic update */
2857         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2858
2859         return snprintf(buf, PAGE_SIZE, "%d\n",
2860                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2861 }
2862
2863 static DEVICE_ATTR_RO(hotkey_radio_sw);
2864
2865 static void hotkey_radio_sw_notify_change(void)
2866 {
2867         if (tp_features.hotkey_wlsw)
2868                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2869                              "hotkey_radio_sw");
2870 }
2871
2872 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2873 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2874                            struct device_attribute *attr,
2875                            char *buf)
2876 {
2877         int res, s;
2878         res = hotkey_get_tablet_mode(&s);
2879         if (res < 0)
2880                 return res;
2881
2882         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2883 }
2884
2885 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2886
2887 static void hotkey_tablet_mode_notify_change(void)
2888 {
2889         if (tp_features.hotkey_tablet)
2890                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2891                              "hotkey_tablet_mode");
2892 }
2893
2894 /* sysfs wakeup reason (pollable) -------------------------------------- */
2895 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2896                            struct device_attribute *attr,
2897                            char *buf)
2898 {
2899         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2900 }
2901
2902 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2903
2904 static void hotkey_wakeup_reason_notify_change(void)
2905 {
2906         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2907                      "wakeup_reason");
2908 }
2909
2910 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2911 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2912                            struct device_attribute *attr,
2913                            char *buf)
2914 {
2915         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2916 }
2917
2918 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
2919                    hotkey_wakeup_hotunplug_complete_show, NULL);
2920
2921 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2922 {
2923         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2924                      "wakeup_hotunplug_complete");
2925 }
2926
2927 /* sysfs adaptive kbd mode --------------------------------------------- */
2928
2929 static int adaptive_keyboard_get_mode(void);
2930 static int adaptive_keyboard_set_mode(int new_mode);
2931
2932 enum ADAPTIVE_KEY_MODE {
2933         HOME_MODE,
2934         WEB_BROWSER_MODE,
2935         WEB_CONFERENCE_MODE,
2936         FUNCTION_MODE,
2937         LAYFLAT_MODE
2938 };
2939
2940 static ssize_t adaptive_kbd_mode_show(struct device *dev,
2941                            struct device_attribute *attr,
2942                            char *buf)
2943 {
2944         int current_mode;
2945
2946         current_mode = adaptive_keyboard_get_mode();
2947         if (current_mode < 0)
2948                 return current_mode;
2949
2950         return snprintf(buf, PAGE_SIZE, "%d\n", current_mode);
2951 }
2952
2953 static ssize_t adaptive_kbd_mode_store(struct device *dev,
2954                             struct device_attribute *attr,
2955                             const char *buf, size_t count)
2956 {
2957         unsigned long t;
2958         int res;
2959
2960         if (parse_strtoul(buf, LAYFLAT_MODE, &t))
2961                 return -EINVAL;
2962
2963         res = adaptive_keyboard_set_mode(t);
2964         return (res < 0) ? res : count;
2965 }
2966
2967 static DEVICE_ATTR_RW(adaptive_kbd_mode);
2968
2969 static struct attribute *adaptive_kbd_attributes[] = {
2970         &dev_attr_adaptive_kbd_mode.attr,
2971         NULL
2972 };
2973
2974 static const struct attribute_group adaptive_kbd_attr_group = {
2975         .attrs = adaptive_kbd_attributes,
2976 };
2977
2978 /* --------------------------------------------------------------------- */
2979
2980 static struct attribute *hotkey_attributes[] __initdata = {
2981         &dev_attr_hotkey_enable.attr,
2982         &dev_attr_hotkey_bios_enabled.attr,
2983         &dev_attr_hotkey_bios_mask.attr,
2984         &dev_attr_wakeup_reason.attr,
2985         &dev_attr_wakeup_hotunplug_complete.attr,
2986         &dev_attr_hotkey_mask.attr,
2987         &dev_attr_hotkey_all_mask.attr,
2988         &dev_attr_hotkey_recommended_mask.attr,
2989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2990         &dev_attr_hotkey_source_mask.attr,
2991         &dev_attr_hotkey_poll_freq.attr,
2992 #endif
2993 };
2994
2995 /*
2996  * Sync both the hw and sw blocking state of all switches
2997  */
2998 static void tpacpi_send_radiosw_update(void)
2999 {
3000         int wlsw;
3001
3002         /*
3003          * We must sync all rfkill controllers *before* issuing any
3004          * rfkill input events, or we will race the rfkill core input
3005          * handler.
3006          *
3007          * tpacpi_inputdev_send_mutex works as a synchronization point
3008          * for the above.
3009          *
3010          * We optimize to avoid numerous calls to hotkey_get_wlsw.
3011          */
3012
3013         wlsw = hotkey_get_wlsw();
3014
3015         /* Sync hw blocking state first if it is hw-blocked */
3016         if (wlsw == TPACPI_RFK_RADIO_OFF)
3017                 tpacpi_rfk_update_hwblock_state(true);
3018
3019         /* Sync sw blocking state */
3020         tpacpi_rfk_update_swstate_all();
3021
3022         /* Sync hw blocking state last if it is hw-unblocked */
3023         if (wlsw == TPACPI_RFK_RADIO_ON)
3024                 tpacpi_rfk_update_hwblock_state(false);
3025
3026         /* Issue rfkill input event for WLSW switch */
3027         if (!(wlsw < 0)) {
3028                 mutex_lock(&tpacpi_inputdev_send_mutex);
3029
3030                 input_report_switch(tpacpi_inputdev,
3031                                     SW_RFKILL_ALL, (wlsw > 0));
3032                 input_sync(tpacpi_inputdev);
3033
3034                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3035         }
3036
3037         /*
3038          * this can be unconditional, as we will poll state again
3039          * if userspace uses the notify to read data
3040          */
3041         hotkey_radio_sw_notify_change();
3042 }
3043
3044 static void hotkey_exit(void)
3045 {
3046 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3047         mutex_lock(&hotkey_mutex);
3048         hotkey_poll_stop_sync();
3049         mutex_unlock(&hotkey_mutex);
3050 #endif
3051
3052         if (hotkey_dev_attributes)
3053                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3054
3055         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3056                    "restoring original HKEY status and mask\n");
3057         /* yes, there is a bitwise or below, we want the
3058          * functions to be called even if one of them fail */
3059         if (((tp_features.hotkey_mask &&
3060               hotkey_mask_set(hotkey_orig_mask)) |
3061              hotkey_status_set(false)) != 0)
3062                 pr_err("failed to restore hot key mask "
3063                        "to BIOS defaults\n");
3064 }
3065
3066 static void __init hotkey_unmap(const unsigned int scancode)
3067 {
3068         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3069                 clear_bit(hotkey_keycode_map[scancode],
3070                           tpacpi_inputdev->keybit);
3071                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3072         }
3073 }
3074
3075 /*
3076  * HKEY quirks:
3077  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3078  */
3079
3080 #define TPACPI_HK_Q_INIMASK     0x0001
3081
3082 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3083         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3084         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3085         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3086         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3087         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3088         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3089         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3090         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3091         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3092         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3093         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3094         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3095         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3096         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3097         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3098         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3099         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3100         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3101         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3102 };
3103
3104 typedef u16 tpacpi_keymap_entry_t;
3105 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3106
3107 static int __init hotkey_init(struct ibm_init_struct *iibm)
3108 {
3109         /* Requirements for changing the default keymaps:
3110          *
3111          * 1. Many of the keys are mapped to KEY_RESERVED for very
3112          *    good reasons.  Do not change them unless you have deep
3113          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3114          *    the various ThinkPad models.  The driver behaves
3115          *    differently for KEY_RESERVED: such keys have their
3116          *    hot key mask *unset* in mask_recommended, and also
3117          *    in the initial hot key mask programmed into the
3118          *    firmware at driver load time, which means the firm-
3119          *    ware may react very differently if you change them to
3120          *    something else;
3121          *
3122          * 2. You must be subscribed to the linux-thinkpad and
3123          *    ibm-acpi-devel mailing lists, and you should read the
3124          *    list archives since 2007 if you want to change the
3125          *    keymaps.  This requirement exists so that you will
3126          *    know the past history of problems with the thinkpad-
3127          *    acpi driver keymaps, and also that you will be
3128          *    listening to any bug reports;
3129          *
3130          * 3. Do not send thinkpad-acpi specific patches directly to
3131          *    for merging, *ever*.  Send them to the linux-acpi
3132          *    mailinglist for comments.  Merging is to be done only
3133          *    through acpi-test and the ACPI maintainer.
3134          *
3135          * If the above is too much to ask, don't change the keymap.
3136          * Ask the thinkpad-acpi maintainer to do it, instead.
3137          */
3138
3139         enum keymap_index {
3140                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3141                 TPACPI_KEYMAP_LENOVO_GENERIC,
3142         };
3143
3144         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3145         /* Generic keymap for IBM ThinkPads */
3146         [TPACPI_KEYMAP_IBM_GENERIC] = {
3147                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3148                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3149                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3150                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3151
3152                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3153                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3154                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3155                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3156
3157                 /* brightness: firmware always reacts to them */
3158                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3159                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3160
3161                 /* Thinklight: firmware always react to it */
3162                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3163
3164                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3165                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3166
3167                 /* Volume: firmware always react to it and reprograms
3168                  * the built-in *extra* mixer.  Never map it to control
3169                  * another mixer by default. */
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                 /* No assignments, only used for Adaptive keyboards. */
3181                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3182                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3183                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3184                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3185                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3186                 },
3187
3188         /* Generic keymap for Lenovo ThinkPads */
3189         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3190                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3191                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3192                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3193                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3194
3195                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3196                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3197                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3198                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3199
3200                 /* These should be enabled --only-- when ACPI video
3201                  * is disabled (i.e. in "vendor" mode), and are handled
3202                  * in a special way by the init code */
3203                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3204                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3205
3206                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3207
3208                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3209                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3210
3211                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3212                  * react to it and reprograms the built-in *extra* mixer.
3213                  * Never map it to control another mixer by default.
3214                  *
3215                  * T60?, T61, R60?, R61: firmware and EC tries to send
3216                  * these over the regular keyboard, so these are no-ops,
3217                  * but there are still weird bugs re. MUTE, so do not
3218                  * change unless you get test reports from all Lenovo
3219                  * models.  May cause the BIOS to interfere with the
3220                  * HDA mixer.
3221                  */
3222                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3223                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3224                 KEY_RESERVED,   /* 0x16: MUTE */
3225
3226                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3227
3228                 /* (assignments unknown, please report if found) */
3229                 KEY_UNKNOWN, KEY_UNKNOWN,
3230
3231                 /*
3232                  * The mic mute button only sends 0x1a.  It does not
3233                  * automatically mute the mic or change the mute light.
3234                  */
3235                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3236
3237                 /* (assignments unknown, please report if found) */
3238                 KEY_UNKNOWN,
3239
3240                 /* Extra keys in use since the X240 / T440 / T540 */
3241                 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3242
3243                 /*
3244                  * These are the adaptive keyboard keycodes for Carbon X1 2014.
3245                  * The first item in this list is the Mute button which is
3246                  * emitted with 0x103 through
3247                  * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3248                  * symbol is held.
3249                  * We'll need to offset those by 0x20.
3250                  */
3251                 KEY_RESERVED,        /* Mute held, 0x103 */
3252                 KEY_BRIGHTNESS_MIN,  /* Backlight off */
3253                 KEY_RESERVED,        /* Clipping tool */
3254                 KEY_RESERVED,        /* Cloud */
3255                 KEY_RESERVED,
3256                 KEY_VOICECOMMAND,    /* Voice */
3257                 KEY_RESERVED,
3258                 KEY_RESERVED,        /* Gestures */
3259                 KEY_RESERVED,
3260                 KEY_RESERVED,
3261                 KEY_RESERVED,
3262                 KEY_CONFIG,          /* Settings */
3263                 KEY_RESERVED,        /* New tab */
3264                 KEY_REFRESH,         /* Reload */
3265                 KEY_BACK,            /* Back */
3266                 KEY_RESERVED,        /* Microphone down */
3267                 KEY_RESERVED,        /* Microphone up */
3268                 KEY_RESERVED,        /* Microphone cancellation */
3269                 KEY_RESERVED,        /* Camera mode */
3270                 KEY_RESERVED,        /* Rotate display, 0x116 */
3271                 },
3272         };
3273
3274         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3275                 /* Generic maps (fallback) */
3276                 {
3277                   .vendor = PCI_VENDOR_ID_IBM,
3278                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3279                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3280                 },
3281                 {
3282                   .vendor = PCI_VENDOR_ID_LENOVO,
3283                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3284                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3285                 },
3286         };
3287
3288 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3289 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3290
3291         int res, i;
3292         int status;
3293         int hkeyv;
3294         bool radiosw_state  = false;
3295         bool tabletsw_state = false;
3296
3297         unsigned long quirks;
3298         unsigned long keymap_id;
3299
3300         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3301                         "initializing hotkey subdriver\n");
3302
3303         BUG_ON(!tpacpi_inputdev);
3304         BUG_ON(tpacpi_inputdev->open != NULL ||
3305                tpacpi_inputdev->close != NULL);
3306
3307         TPACPI_ACPIHANDLE_INIT(hkey);
3308         mutex_init(&hotkey_mutex);
3309
3310 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3311         mutex_init(&hotkey_thread_data_mutex);
3312 #endif
3313
3314         /* hotkey not supported on 570 */
3315         tp_features.hotkey = hkey_handle != NULL;
3316
3317         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3318                 "hotkeys are %s\n",
3319                 str_supported(tp_features.hotkey));
3320
3321         if (!tp_features.hotkey)
3322                 return 1;
3323
3324         /*
3325          * Check if we have an adaptive keyboard, like on the
3326          * Lenovo Carbon X1 2014 (2nd Gen).
3327          */
3328         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3329                 if ((hkeyv >> 8) == 2) {
3330                         tp_features.has_adaptive_kbd = true;
3331                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3332                                         &adaptive_kbd_attr_group);
3333                         if (res)
3334                                 goto err_exit;
3335                 }
3336         }
3337
3338         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3339                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3340
3341         tpacpi_disable_brightness_delay();
3342
3343         /* MUST have enough space for all attributes to be added to
3344          * hotkey_dev_attributes */
3345         hotkey_dev_attributes = create_attr_set(
3346                                         ARRAY_SIZE(hotkey_attributes) + 2,
3347                                         NULL);
3348         if (!hotkey_dev_attributes)
3349                 return -ENOMEM;
3350         res = add_many_to_attr_set(hotkey_dev_attributes,
3351                         hotkey_attributes,
3352                         ARRAY_SIZE(hotkey_attributes));
3353         if (res)
3354                 goto err_exit;
3355
3356         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3357            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3358            for HKEY interface version 0x100 */
3359         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3360                 if ((hkeyv >> 8) != 1) {
3361                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3362                                hkeyv);
3363                         pr_err("please report this to %s\n", TPACPI_MAIL);
3364                 } else {
3365                         /*
3366                          * MHKV 0x100 in A31, R40, R40e,
3367                          * T4x, X31, and later
3368                          */
3369                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3370                                 "firmware HKEY interface version: 0x%x\n",
3371                                 hkeyv);
3372
3373                         /* Paranoia check AND init hotkey_all_mask */
3374                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3375                                         "MHKA", "qd")) {
3376                                 pr_err("missing MHKA handler, "
3377                                        "please report this to %s\n",
3378                                        TPACPI_MAIL);
3379                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3380                                 hotkey_all_mask = 0x080cU;
3381                         } else {
3382                                 tp_features.hotkey_mask = 1;
3383                         }
3384                 }
3385         }
3386
3387         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3388                 "hotkey masks are %s\n",
3389                 str_supported(tp_features.hotkey_mask));
3390
3391         /* Init hotkey_all_mask if not initialized yet */
3392         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3393             (quirks & TPACPI_HK_Q_INIMASK))
3394                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3395
3396         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3397         if (tp_features.hotkey_mask) {
3398                 /* hotkey_source_mask *must* be zero for
3399                  * the first hotkey_mask_get to return hotkey_orig_mask */
3400                 res = hotkey_mask_get();
3401                 if (res)
3402                         goto err_exit;
3403
3404                 hotkey_orig_mask = hotkey_acpi_mask;
3405         } else {
3406                 hotkey_orig_mask = hotkey_all_mask;
3407                 hotkey_acpi_mask = hotkey_all_mask;
3408         }
3409
3410 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3411         if (dbg_wlswemul) {
3412                 tp_features.hotkey_wlsw = 1;
3413                 radiosw_state = !!tpacpi_wlsw_emulstate;
3414                 pr_info("radio switch emulation enabled\n");
3415         } else
3416 #endif
3417         /* Not all thinkpads have a hardware radio switch */
3418         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3419                 tp_features.hotkey_wlsw = 1;
3420                 radiosw_state = !!status;
3421                 pr_info("radio switch found; radios are %s\n",
3422                         enabled(status, 0));
3423         }
3424         if (tp_features.hotkey_wlsw)
3425                 res = add_to_attr_set(hotkey_dev_attributes,
3426                                 &dev_attr_hotkey_radio_sw.attr);
3427
3428         /* For X41t, X60t, X61t Tablets... */
3429         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3430                 tp_features.hotkey_tablet = 1;
3431                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3432                 pr_info("possible tablet mode switch found; "
3433                         "ThinkPad in %s mode\n",
3434                         (tabletsw_state) ? "tablet" : "laptop");
3435                 res = add_to_attr_set(hotkey_dev_attributes,
3436                                 &dev_attr_hotkey_tablet_mode.attr);
3437         }
3438
3439         if (!res)
3440                 res = register_attr_set_with_sysfs(
3441                                 hotkey_dev_attributes,
3442                                 &tpacpi_pdev->dev.kobj);
3443         if (res)
3444                 goto err_exit;
3445
3446         /* Set up key map */
3447         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3448                                         GFP_KERNEL);
3449         if (!hotkey_keycode_map) {
3450                 pr_err("failed to allocate memory for key map\n");
3451                 res = -ENOMEM;
3452                 goto err_exit;
3453         }
3454
3455         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3456                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3457         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3458         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3459                    "using keymap number %lu\n", keymap_id);
3460
3461         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3462                 TPACPI_HOTKEY_MAP_SIZE);
3463
3464         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3465         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3466         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3467         tpacpi_inputdev->keycode = hotkey_keycode_map;
3468         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3469                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3470                         input_set_capability(tpacpi_inputdev, EV_KEY,
3471                                                 hotkey_keycode_map[i]);
3472                 } else {
3473                         if (i < sizeof(hotkey_reserved_mask)*8)
3474                                 hotkey_reserved_mask |= 1 << i;
3475                 }
3476         }
3477
3478         if (tp_features.hotkey_wlsw) {
3479                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3480                 input_report_switch(tpacpi_inputdev,
3481                                     SW_RFKILL_ALL, radiosw_state);
3482         }
3483         if (tp_features.hotkey_tablet) {
3484                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3485                 input_report_switch(tpacpi_inputdev,
3486                                     SW_TABLET_MODE, tabletsw_state);
3487         }
3488
3489         /* Do not issue duplicate brightness change events to
3490          * userspace. tpacpi_detect_brightness_capabilities() must have
3491          * been called before this point  */
3492         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3493                 pr_info("This ThinkPad has standard ACPI backlight "
3494                         "brightness control, supported by the ACPI "
3495                         "video driver\n");
3496                 pr_notice("Disabling thinkpad-acpi brightness events "
3497                           "by default...\n");
3498
3499                 /* Disable brightness up/down on Lenovo thinkpads when
3500                  * ACPI is handling them, otherwise it is plain impossible
3501                  * for userspace to do something even remotely sane */
3502                 hotkey_reserved_mask |=
3503                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3504                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3505                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3506                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3507         }
3508
3509 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3510         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3511                                 & ~hotkey_all_mask
3512                                 & ~hotkey_reserved_mask;
3513
3514         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3515                     "hotkey source mask 0x%08x, polling freq %u\n",
3516                     hotkey_source_mask, hotkey_poll_freq);
3517 #endif
3518
3519         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3520                         "enabling firmware HKEY event interface...\n");
3521         res = hotkey_status_set(true);
3522         if (res) {
3523                 hotkey_exit();
3524                 return res;
3525         }
3526         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3527                                | hotkey_driver_mask)
3528                               & ~hotkey_source_mask);
3529         if (res < 0 && res != -ENXIO) {
3530                 hotkey_exit();
3531                 return res;
3532         }
3533         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3534                                 & ~hotkey_reserved_mask;
3535         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3536                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3537                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3538
3539         tpacpi_inputdev->open = &hotkey_inputdev_open;
3540         tpacpi_inputdev->close = &hotkey_inputdev_close;
3541
3542         hotkey_poll_setup_safe(true);
3543
3544         return 0;
3545
3546 err_exit:
3547         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3548         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3549                         &adaptive_kbd_attr_group);
3550
3551         hotkey_dev_attributes = NULL;
3552
3553         return (res < 0) ? res : 1;
3554 }
3555
3556 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3557  * mode, Web conference mode, Function mode and Lay-flat mode.
3558  * We support Home mode and Function mode currently.
3559  *
3560  * Will consider support rest of modes in future.
3561  *
3562  */
3563 static const int adaptive_keyboard_modes[] = {
3564         HOME_MODE,
3565 /*      WEB_BROWSER_MODE = 2,
3566         WEB_CONFERENCE_MODE = 3, */
3567         FUNCTION_MODE
3568 };
3569
3570 #define DFR_CHANGE_ROW                  0x101
3571 #define DFR_SHOW_QUICKVIEW_ROW          0x102
3572 #define FIRST_ADAPTIVE_KEY              0x103
3573 #define ADAPTIVE_KEY_OFFSET             0x020
3574
3575 /* press Fn key a while second, it will switch to Function Mode. Then
3576  * release Fn key, previous mode be restored.
3577  */
3578 static bool adaptive_keyboard_mode_is_saved;
3579 static int adaptive_keyboard_prev_mode;
3580
3581 static int adaptive_keyboard_get_mode(void)
3582 {
3583         int mode = 0;
3584
3585         if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3586                 pr_err("Cannot read adaptive keyboard mode\n");
3587                 return -EIO;
3588         }
3589
3590         return mode;
3591 }
3592
3593 static int adaptive_keyboard_set_mode(int new_mode)
3594 {
3595         if (new_mode < 0 ||
3596                 new_mode > LAYFLAT_MODE)
3597                 return -EINVAL;
3598
3599         if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3600                 pr_err("Cannot set adaptive keyboard mode\n");
3601                 return -EIO;
3602         }
3603
3604         return 0;
3605 }
3606
3607 static int adaptive_keyboard_get_next_mode(int mode)
3608 {
3609         size_t i;
3610         size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3611
3612         for (i = 0; i <= max_mode; i++) {
3613                 if (adaptive_keyboard_modes[i] == mode)
3614                         break;
3615         }
3616
3617         if (i >= max_mode)
3618                 i = 0;
3619         else
3620                 i++;
3621
3622         return adaptive_keyboard_modes[i];
3623 }
3624
3625 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3626 {
3627         int current_mode = 0;
3628         int new_mode = 0;
3629         int keycode;
3630
3631         switch (scancode) {
3632         case DFR_CHANGE_ROW:
3633                 if (adaptive_keyboard_mode_is_saved) {
3634                         new_mode = adaptive_keyboard_prev_mode;
3635                         adaptive_keyboard_mode_is_saved = false;
3636                 } else {
3637                         current_mode = adaptive_keyboard_get_mode();
3638                         if (current_mode < 0)
3639                                 return false;
3640                         new_mode = adaptive_keyboard_get_next_mode(
3641                                         current_mode);
3642                 }
3643
3644                 if (adaptive_keyboard_set_mode(new_mode) < 0)
3645                         return false;
3646
3647                 return true;
3648
3649         case DFR_SHOW_QUICKVIEW_ROW:
3650                 current_mode = adaptive_keyboard_get_mode();
3651                 if (current_mode < 0)
3652                         return false;
3653
3654                 adaptive_keyboard_prev_mode = current_mode;
3655                 adaptive_keyboard_mode_is_saved = true;
3656
3657                 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3658                         return false;
3659                 return true;
3660
3661         default:
3662                 if (scancode < FIRST_ADAPTIVE_KEY ||
3663                     scancode >= FIRST_ADAPTIVE_KEY + TPACPI_HOTKEY_MAP_LEN -
3664                                 ADAPTIVE_KEY_OFFSET) {
3665                         pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3666                                         scancode);
3667                         return false;
3668                 }
3669                 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + ADAPTIVE_KEY_OFFSET];
3670                 if (keycode != KEY_RESERVED) {
3671                         mutex_lock(&tpacpi_inputdev_send_mutex);
3672
3673                         input_report_key(tpacpi_inputdev, keycode, 1);
3674                         input_sync(tpacpi_inputdev);
3675
3676                         input_report_key(tpacpi_inputdev, keycode, 0);
3677                         input_sync(tpacpi_inputdev);
3678
3679                         mutex_unlock(&tpacpi_inputdev_send_mutex);
3680                 }
3681                 return true;
3682         }
3683 }
3684
3685 static bool hotkey_notify_hotkey(const u32 hkey,
3686                                  bool *send_acpi_ev,
3687                                  bool *ignore_acpi_ev)
3688 {
3689         /* 0x1000-0x1FFF: key presses */
3690         unsigned int scancode = hkey & 0xfff;
3691         *send_acpi_ev = true;
3692         *ignore_acpi_ev = false;
3693
3694         /* HKEY event 0x1001 is scancode 0x00 */
3695         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3696                 scancode--;
3697                 if (!(hotkey_source_mask & (1 << scancode))) {
3698                         tpacpi_input_send_key_masked(scancode);
3699                         *send_acpi_ev = false;
3700                 } else {
3701                         *ignore_acpi_ev = true;
3702                 }
3703                 return true;
3704         } else {
3705                 return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3706         }
3707         return false;
3708 }
3709
3710 static bool hotkey_notify_wakeup(const u32 hkey,
3711                                  bool *send_acpi_ev,
3712                                  bool *ignore_acpi_ev)
3713 {
3714         /* 0x2000-0x2FFF: Wakeup reason */
3715         *send_acpi_ev = true;
3716         *ignore_acpi_ev = false;
3717
3718         switch (hkey) {
3719         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3720         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3721                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3722                 *ignore_acpi_ev = true;
3723                 break;
3724
3725         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3726         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3727                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3728                 *ignore_acpi_ev = true;
3729                 break;
3730
3731         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3732         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3733                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3734                 /* how to auto-heal: */
3735                 /* 2313: woke up from S3, go to S4/S5 */
3736                 /* 2413: woke up from S4, go to S5 */
3737                 break;
3738
3739         default:
3740                 return false;
3741         }
3742
3743         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3744                 pr_info("woke up due to a hot-unplug request...\n");
3745                 hotkey_wakeup_reason_notify_change();
3746         }
3747         return true;
3748 }
3749
3750 static bool hotkey_notify_dockevent(const u32 hkey,
3751                                  bool *send_acpi_ev,
3752                                  bool *ignore_acpi_ev)
3753 {
3754         /* 0x4000-0x4FFF: dock-related events */
3755         *send_acpi_ev = true;
3756         *ignore_acpi_ev = false;
3757
3758         switch (hkey) {
3759         case TP_HKEY_EV_UNDOCK_ACK:
3760                 /* ACPI undock operation completed after wakeup */
3761                 hotkey_autosleep_ack = 1;
3762                 pr_info("undocked\n");
3763                 hotkey_wakeup_hotunplug_complete_notify_change();
3764                 return true;
3765
3766         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3767                 pr_info("docked into hotplug port replicator\n");
3768                 return true;
3769         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3770                 pr_info("undocked from hotplug port replicator\n");
3771                 return true;
3772
3773         default:
3774                 return false;
3775         }
3776 }
3777
3778 static bool hotkey_notify_usrevent(const u32 hkey,
3779                                  bool *send_acpi_ev,
3780                                  bool *ignore_acpi_ev)
3781 {
3782         /* 0x5000-0x5FFF: human interface helpers */
3783         *send_acpi_ev = true;
3784         *ignore_acpi_ev = false;
3785
3786         switch (hkey) {
3787         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3788         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3789                 return true;
3790
3791         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3792         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3793                 tpacpi_input_send_tabletsw();
3794                 hotkey_tablet_mode_notify_change();
3795                 *send_acpi_ev = false;
3796                 return true;
3797
3798         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3799         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3800         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3801                 /* do not propagate these events */
3802                 *ignore_acpi_ev = true;
3803                 return true;
3804
3805         default:
3806                 return false;
3807         }
3808 }
3809
3810 static void thermal_dump_all_sensors(void);
3811
3812 static bool hotkey_notify_6xxx(const u32 hkey,
3813                                  bool *send_acpi_ev,
3814                                  bool *ignore_acpi_ev)
3815 {
3816         bool known = true;
3817
3818         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3819         *send_acpi_ev = true;
3820         *ignore_acpi_ev = false;
3821
3822         switch (hkey) {
3823         case TP_HKEY_EV_THM_TABLE_CHANGED:
3824                 pr_info("EC reports that Thermal Table has changed\n");
3825                 /* recommended action: do nothing, we don't have
3826                  * Lenovo ATM information */
3827                 return true;
3828         case TP_HKEY_EV_ALARM_BAT_HOT:
3829                 pr_crit("THERMAL ALARM: battery is too hot!\n");
3830                 /* recommended action: warn user through gui */
3831                 break;
3832         case TP_HKEY_EV_ALARM_BAT_XHOT:
3833                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3834                 /* recommended action: immediate sleep/hibernate */
3835                 break;
3836         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3837                 pr_crit("THERMAL ALARM: "
3838                         "a sensor reports something is too hot!\n");
3839                 /* recommended action: warn user through gui, that */
3840                 /* some internal component is too hot */
3841                 break;
3842         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3843                 pr_alert("THERMAL EMERGENCY: "
3844                          "a sensor reports something is extremely hot!\n");
3845                 /* recommended action: immediate sleep/hibernate */
3846                 break;
3847         case TP_HKEY_EV_AC_CHANGED:
3848                 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3849                  * AC status changed; can be triggered by plugging or
3850                  * unplugging AC adapter, docking or undocking. */
3851
3852                 /* fallthrough */
3853
3854         case TP_HKEY_EV_KEY_NUMLOCK:
3855         case TP_HKEY_EV_KEY_FN:
3856         case TP_HKEY_EV_KEY_FN_ESC:
3857                 /* key press events, we just ignore them as long as the EC
3858                  * is still reporting them in the normal keyboard stream */
3859                 *send_acpi_ev = false;
3860                 *ignore_acpi_ev = true;
3861                 return true;
3862
3863         default:
3864                 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3865                 known = false;
3866         }
3867
3868         thermal_dump_all_sensors();
3869
3870         return known;
3871 }
3872
3873 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3874 {
3875         u32 hkey;
3876         bool send_acpi_ev;
3877         bool ignore_acpi_ev;
3878         bool known_ev;
3879
3880         if (event != 0x80) {
3881                 pr_err("unknown HKEY notification event %d\n", event);
3882                 /* forward it to userspace, maybe it knows how to handle it */
3883                 acpi_bus_generate_netlink_event(
3884                                         ibm->acpi->device->pnp.device_class,
3885                                         dev_name(&ibm->acpi->device->dev),
3886                                         event, 0);
3887                 return;
3888         }
3889
3890         while (1) {
3891                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3892                         pr_err("failed to retrieve HKEY event\n");
3893                         return;
3894                 }
3895
3896                 if (hkey == 0) {
3897                         /* queue empty */
3898                         return;
3899                 }
3900
3901                 send_acpi_ev = true;
3902                 ignore_acpi_ev = false;
3903
3904                 switch (hkey >> 12) {
3905                 case 1:
3906                         /* 0x1000-0x1FFF: key presses */
3907                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3908                                                  &ignore_acpi_ev);
3909                         break;
3910                 case 2:
3911                         /* 0x2000-0x2FFF: Wakeup reason */
3912                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3913                                                  &ignore_acpi_ev);
3914                         break;
3915                 case 3:
3916                         /* 0x3000-0x3FFF: bay-related wakeups */
3917                         switch (hkey) {
3918                         case TP_HKEY_EV_BAYEJ_ACK:
3919                                 hotkey_autosleep_ack = 1;
3920                                 pr_info("bay ejected\n");
3921                                 hotkey_wakeup_hotunplug_complete_notify_change();
3922                                 known_ev = true;
3923                                 break;
3924                         case TP_HKEY_EV_OPTDRV_EJ:
3925                                 /* FIXME: kick libata if SATA link offline */
3926                                 known_ev = true;
3927                                 break;
3928                         default:
3929                                 known_ev = false;
3930                         }
3931                         break;
3932                 case 4:
3933                         /* 0x4000-0x4FFF: dock-related events */
3934                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3935                                                 &ignore_acpi_ev);
3936                         break;
3937                 case 5:
3938                         /* 0x5000-0x5FFF: human interface helpers */
3939                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3940                                                  &ignore_acpi_ev);
3941                         break;
3942                 case 6:
3943                         /* 0x6000-0x6FFF: thermal alarms/notices and
3944                          *                keyboard events */
3945                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3946                                                  &ignore_acpi_ev);
3947                         break;
3948                 case 7:
3949                         /* 0x7000-0x7FFF: misc */
3950                         if (tp_features.hotkey_wlsw &&
3951                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3952                                 tpacpi_send_radiosw_update();
3953                                 send_acpi_ev = 0;
3954                                 known_ev = true;
3955                                 break;
3956                         }
3957                         /* fallthrough to default */
3958                 default:
3959                         known_ev = false;
3960                 }
3961                 if (!known_ev) {
3962                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3963                         pr_notice("please report the conditions when this "
3964                                   "event happened to %s\n", TPACPI_MAIL);
3965                 }
3966
3967                 /* netlink events */
3968                 if (!ignore_acpi_ev && send_acpi_ev) {
3969                         acpi_bus_generate_netlink_event(
3970                                         ibm->acpi->device->pnp.device_class,
3971                                         dev_name(&ibm->acpi->device->dev),
3972                                         event, hkey);
3973                 }
3974         }
3975 }
3976
3977 static void hotkey_suspend(void)
3978 {
3979         /* Do these on suspend, we get the events on early resume! */
3980         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3981         hotkey_autosleep_ack = 0;
3982
3983         /* save previous mode of adaptive keyboard of X1 Carbon */
3984         if (tp_features.has_adaptive_kbd) {
3985                 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
3986                                         "GTRW", "dd", 0)) {
3987                         pr_err("Cannot read adaptive keyboard mode.\n");
3988                 }
3989         }
3990 }
3991
3992 static void hotkey_resume(void)
3993 {
3994         tpacpi_disable_brightness_delay();
3995
3996         if (hotkey_status_set(true) < 0 ||
3997             hotkey_mask_set(hotkey_acpi_mask) < 0)
3998                 pr_err("error while attempting to reset the event "
3999                        "firmware interface\n");
4000
4001         tpacpi_send_radiosw_update();
4002         hotkey_tablet_mode_notify_change();
4003         hotkey_wakeup_reason_notify_change();
4004         hotkey_wakeup_hotunplug_complete_notify_change();
4005         hotkey_poll_setup_safe(false);
4006
4007         /* restore previous mode of adapive keyboard of X1 Carbon */
4008         if (tp_features.has_adaptive_kbd) {
4009                 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4010                                         adaptive_keyboard_prev_mode)) {
4011                         pr_err("Cannot set adaptive keyboard mode.\n");
4012                 }
4013         }
4014 }
4015
4016 /* procfs -------------------------------------------------------------- */
4017 static int hotkey_read(struct seq_file *m)
4018 {
4019         int res, status;
4020
4021         if (!tp_features.hotkey) {
4022                 seq_printf(m, "status:\t\tnot supported\n");
4023                 return 0;
4024         }
4025
4026         if (mutex_lock_killable(&hotkey_mutex))
4027                 return -ERESTARTSYS;
4028         res = hotkey_status_get(&status);
4029         if (!res)
4030                 res = hotkey_mask_get();
4031         mutex_unlock(&hotkey_mutex);
4032         if (res)
4033                 return res;
4034
4035         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
4036         if (hotkey_all_mask) {
4037                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4038                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4039         } else {
4040                 seq_printf(m, "mask:\t\tnot supported\n");
4041                 seq_printf(m, "commands:\tenable, disable, reset\n");
4042         }
4043
4044         return 0;
4045 }
4046
4047 static void hotkey_enabledisable_warn(bool enable)
4048 {
4049         tpacpi_log_usertask("procfs hotkey enable/disable");
4050         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4051                   pr_fmt("hotkey enable/disable functionality has been "
4052                          "removed from the driver.  "
4053                          "Hotkeys are always enabled.\n")))
4054                 pr_err("Please remove the hotkey=enable module "
4055                        "parameter, it is deprecated.  "
4056                        "Hotkeys are always enabled.\n");
4057 }
4058
4059 static int hotkey_write(char *buf)
4060 {
4061         int res;
4062         u32 mask;
4063         char *cmd;
4064
4065         if (!tp_features.hotkey)
4066                 return -ENODEV;
4067
4068         if (mutex_lock_killable(&hotkey_mutex))
4069                 return -ERESTARTSYS;
4070
4071         mask = hotkey_user_mask;
4072
4073         res = 0;
4074         while ((cmd = next_cmd(&buf))) {
4075                 if (strlencmp(cmd, "enable") == 0) {
4076                         hotkey_enabledisable_warn(1);
4077                 } else if (strlencmp(cmd, "disable") == 0) {
4078                         hotkey_enabledisable_warn(0);
4079                         res = -EPERM;
4080                 } else if (strlencmp(cmd, "reset") == 0) {
4081                         mask = (hotkey_all_mask | hotkey_source_mask)
4082                                 & ~hotkey_reserved_mask;
4083                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
4084                         /* mask set */
4085                 } else if (sscanf(cmd, "%x", &mask) == 1) {
4086                         /* mask set */
4087                 } else {
4088                         res = -EINVAL;
4089                         goto errexit;
4090                 }
4091         }
4092
4093         if (!res) {
4094                 tpacpi_disclose_usertask("procfs hotkey",
4095                         "set mask to 0x%08x\n", mask);
4096                 res = hotkey_user_mask_set(mask);
4097         }
4098
4099 errexit:
4100         mutex_unlock(&hotkey_mutex);
4101         return res;
4102 }
4103
4104 static const struct acpi_device_id ibm_htk_device_ids[] = {
4105         {TPACPI_ACPI_IBM_HKEY_HID, 0},
4106         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4107         {"", 0},
4108 };
4109
4110 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4111         .hid = ibm_htk_device_ids,
4112         .notify = hotkey_notify,
4113         .handle = &hkey_handle,
4114         .type = ACPI_DEVICE_NOTIFY,
4115 };
4116
4117 static struct ibm_struct hotkey_driver_data = {
4118         .name = "hotkey",
4119         .read = hotkey_read,
4120         .write = hotkey_write,
4121         .exit = hotkey_exit,
4122         .resume = hotkey_resume,
4123         .suspend = hotkey_suspend,
4124         .acpi = &ibm_hotkey_acpidriver,
4125 };
4126
4127 /*************************************************************************
4128  * Bluetooth subdriver
4129  */
4130
4131 enum {
4132         /* ACPI GBDC/SBDC bits */
4133         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
4134         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
4135         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
4136                                                    0 = disable, 1 = enable */
4137 };
4138
4139 enum {
4140         /* ACPI \BLTH commands */
4141         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
4142         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
4143         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
4144         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
4145         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
4146 };
4147
4148 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
4149
4150 static int bluetooth_get_status(void)
4151 {
4152         int status;
4153
4154 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4155         if (dbg_bluetoothemul)
4156                 return (tpacpi_bluetooth_emulstate) ?
4157                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4158 #endif
4159
4160         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4161                 return -EIO;
4162
4163         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4164                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4165 }
4166
4167 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4168 {
4169         int status;
4170
4171         vdbg_printk(TPACPI_DBG_RFKILL,
4172                 "will attempt to %s bluetooth\n",
4173                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4174
4175 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4176         if (dbg_bluetoothemul) {
4177                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4178                 return 0;
4179         }
4180 #endif
4181
4182         if (state == TPACPI_RFK_RADIO_ON)
4183                 status = TP_ACPI_BLUETOOTH_RADIOSSW
4184                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
4185         else
4186                 status = 0;
4187
4188         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4189                 return -EIO;
4190
4191         return 0;
4192 }
4193
4194 /* sysfs bluetooth enable ---------------------------------------------- */
4195 static ssize_t bluetooth_enable_show(struct device *dev,
4196                            struct device_attribute *attr,
4197                            char *buf)
4198 {
4199         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4200                         attr, buf);
4201 }
4202
4203 static ssize_t bluetooth_enable_store(struct device *dev,
4204                             struct device_attribute *attr,
4205                             const char *buf, size_t count)
4206 {
4207         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4208                                 attr, buf, count);
4209 }
4210
4211 static DEVICE_ATTR_RW(bluetooth_enable);
4212
4213 /* --------------------------------------------------------------------- */
4214
4215 static struct attribute *bluetooth_attributes[] = {
4216         &dev_attr_bluetooth_enable.attr,
4217         NULL
4218 };
4219
4220 static const struct attribute_group bluetooth_attr_group = {
4221         .attrs = bluetooth_attributes,
4222 };
4223
4224 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4225         .get_status = bluetooth_get_status,
4226         .set_status = bluetooth_set_status,
4227 };
4228
4229 static void bluetooth_shutdown(void)
4230 {
4231         /* Order firmware to save current state to NVRAM */
4232         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4233                         TP_ACPI_BLTH_SAVE_STATE))
4234                 pr_notice("failed to save bluetooth state to NVRAM\n");
4235         else
4236                 vdbg_printk(TPACPI_DBG_RFKILL,
4237                         "bluetooth state saved to NVRAM\n");
4238 }
4239
4240 static void bluetooth_exit(void)
4241 {
4242         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4243                         &bluetooth_attr_group);
4244
4245         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4246
4247         bluetooth_shutdown();
4248 }
4249
4250 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4251 {
4252         int res;
4253         int status = 0;
4254
4255         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4256                         "initializing bluetooth subdriver\n");
4257
4258         TPACPI_ACPIHANDLE_INIT(hkey);
4259
4260         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4261            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4262         tp_features.bluetooth = hkey_handle &&
4263             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4264
4265         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4266                 "bluetooth is %s, status 0x%02x\n",
4267                 str_supported(tp_features.bluetooth),
4268                 status);
4269
4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4271         if (dbg_bluetoothemul) {
4272                 tp_features.bluetooth = 1;
4273                 pr_info("bluetooth switch emulation enabled\n");
4274         } else
4275 #endif
4276         if (tp_features.bluetooth &&
4277             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4278                 /* no bluetooth hardware present in system */
4279                 tp_features.bluetooth = 0;
4280                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4281                            "bluetooth hardware not installed\n");
4282         }
4283
4284         if (!tp_features.bluetooth)
4285                 return 1;
4286
4287         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4288                                 &bluetooth_tprfk_ops,
4289                                 RFKILL_TYPE_BLUETOOTH,
4290                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4291                                 true);
4292         if (res)
4293                 return res;
4294
4295         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4296                                 &bluetooth_attr_group);
4297         if (res) {
4298                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4299                 return res;
4300         }
4301
4302         return 0;
4303 }
4304
4305 /* procfs -------------------------------------------------------------- */
4306 static int bluetooth_read(struct seq_file *m)
4307 {
4308         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4309 }
4310
4311 static int bluetooth_write(char *buf)
4312 {
4313         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4314 }
4315
4316 static struct ibm_struct bluetooth_driver_data = {
4317         .name = "bluetooth",
4318         .read = bluetooth_read,
4319         .write = bluetooth_write,
4320         .exit = bluetooth_exit,
4321         .shutdown = bluetooth_shutdown,
4322 };
4323
4324 /*************************************************************************
4325  * Wan subdriver
4326  */
4327
4328 enum {
4329         /* ACPI GWAN/SWAN bits */
4330         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4331         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4332         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4333                                                    0 = disable, 1 = enable */
4334 };
4335
4336 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4337
4338 static int wan_get_status(void)
4339 {
4340         int status;
4341
4342 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4343         if (dbg_wwanemul)
4344                 return (tpacpi_wwan_emulstate) ?
4345                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4346 #endif
4347
4348         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4349                 return -EIO;
4350
4351         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4352                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4353 }
4354
4355 static int wan_set_status(enum tpacpi_rfkill_state state)
4356 {
4357         int status;
4358
4359         vdbg_printk(TPACPI_DBG_RFKILL,
4360                 "will attempt to %s wwan\n",
4361                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4362
4363 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4364         if (dbg_wwanemul) {
4365                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4366                 return 0;
4367         }
4368 #endif
4369
4370         if (state == TPACPI_RFK_RADIO_ON)
4371                 status = TP_ACPI_WANCARD_RADIOSSW
4372                          | TP_ACPI_WANCARD_RESUMECTRL;
4373         else
4374                 status = 0;
4375
4376         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4377                 return -EIO;
4378
4379         return 0;
4380 }
4381
4382 /* sysfs wan enable ---------------------------------------------------- */
4383 static ssize_t wan_enable_show(struct device *dev,
4384                            struct device_attribute *attr,
4385                            char *buf)
4386 {
4387         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4388                         attr, buf);
4389 }
4390
4391 static ssize_t wan_enable_store(struct device *dev,
4392                             struct device_attribute *attr,
4393                             const char *buf, size_t count)
4394 {
4395         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4396                         attr, buf, count);
4397 }
4398
4399 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4400                    wan_enable_show, wan_enable_store);
4401
4402 /* --------------------------------------------------------------------- */
4403
4404 static struct attribute *wan_attributes[] = {
4405         &dev_attr_wwan_enable.attr,
4406         NULL
4407 };
4408
4409 static const struct attribute_group wan_attr_group = {
4410         .attrs = wan_attributes,
4411 };
4412
4413 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4414         .get_status = wan_get_status,
4415         .set_status = wan_set_status,
4416 };
4417
4418 static void wan_shutdown(void)
4419 {
4420         /* Order firmware to save current state to NVRAM */
4421         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4422                         TP_ACPI_WGSV_SAVE_STATE))
4423                 pr_notice("failed to save WWAN state to NVRAM\n");
4424         else
4425                 vdbg_printk(TPACPI_DBG_RFKILL,
4426                         "WWAN state saved to NVRAM\n");
4427 }
4428
4429 static void wan_exit(void)
4430 {
4431         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4432                 &wan_attr_group);
4433
4434         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4435
4436         wan_shutdown();
4437 }
4438
4439 static int __init wan_init(struct ibm_init_struct *iibm)
4440 {
4441         int res;
4442         int status = 0;
4443
4444         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4445                         "initializing wan subdriver\n");
4446
4447         TPACPI_ACPIHANDLE_INIT(hkey);
4448
4449         tp_features.wan = hkey_handle &&
4450             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4451
4452         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4453                 "wan is %s, status 0x%02x\n",
4454                 str_supported(tp_features.wan),
4455                 status);
4456
4457 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4458         if (dbg_wwanemul) {
4459                 tp_features.wan = 1;
4460                 pr_info("wwan switch emulation enabled\n");
4461         } else
4462 #endif
4463         if (tp_features.wan &&
4464             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4465                 /* no wan hardware present in system */
4466                 tp_features.wan = 0;
4467                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4468                            "wan hardware not installed\n");
4469         }
4470
4471         if (!tp_features.wan)
4472                 return 1;
4473
4474         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4475                                 &wan_tprfk_ops,
4476                                 RFKILL_TYPE_WWAN,
4477                                 TPACPI_RFK_WWAN_SW_NAME,
4478                                 true);
4479         if (res)
4480                 return res;
4481
4482         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4483                                 &wan_attr_group);
4484
4485         if (res) {
4486                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4487                 return res;
4488         }
4489
4490         return 0;
4491 }
4492
4493 /* procfs -------------------------------------------------------------- */
4494 static int wan_read(struct seq_file *m)
4495 {
4496         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4497 }
4498
4499 static int wan_write(char *buf)
4500 {
4501         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4502 }
4503
4504 static struct ibm_struct wan_driver_data = {
4505         .name = "wan",
4506         .read = wan_read,
4507         .write = wan_write,
4508         .exit = wan_exit,
4509         .shutdown = wan_shutdown,
4510 };
4511
4512 /*************************************************************************
4513  * UWB subdriver
4514  */
4515
4516 enum {
4517         /* ACPI GUWB/SUWB bits */
4518         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4519         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4520 };
4521
4522 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4523
4524 static int uwb_get_status(void)
4525 {
4526         int status;
4527
4528 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4529         if (dbg_uwbemul)
4530                 return (tpacpi_uwb_emulstate) ?
4531                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4532 #endif
4533
4534         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4535                 return -EIO;
4536
4537         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4538                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4539 }
4540
4541 static int uwb_set_status(enum tpacpi_rfkill_state state)
4542 {
4543         int status;
4544
4545         vdbg_printk(TPACPI_DBG_RFKILL,
4546                 "will attempt to %s UWB\n",
4547                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4548
4549 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4550         if (dbg_uwbemul) {
4551                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4552                 return 0;
4553         }
4554 #endif
4555
4556         if (state == TPACPI_RFK_RADIO_ON)
4557                 status = TP_ACPI_UWB_RADIOSSW;
4558         else
4559                 status = 0;
4560
4561         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4562                 return -EIO;
4563
4564         return 0;
4565 }
4566
4567 /* --------------------------------------------------------------------- */
4568
4569 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4570         .get_status = uwb_get_status,
4571         .set_status = uwb_set_status,
4572 };
4573
4574 static void uwb_exit(void)
4575 {
4576         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4577 }
4578
4579 static int __init uwb_init(struct ibm_init_struct *iibm)
4580 {
4581         int res;
4582         int status = 0;
4583
4584         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4585                         "initializing uwb subdriver\n");
4586
4587         TPACPI_ACPIHANDLE_INIT(hkey);
4588
4589         tp_features.uwb = hkey_handle &&
4590             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4591
4592         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4593                 "uwb is %s, status 0x%02x\n",
4594                 str_supported(tp_features.uwb),
4595                 status);
4596
4597 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4598         if (dbg_uwbemul) {
4599                 tp_features.uwb = 1;
4600                 pr_info("uwb switch emulation enabled\n");
4601         } else
4602 #endif
4603         if (tp_features.uwb &&
4604             !(status & TP_ACPI_UWB_HWPRESENT)) {
4605                 /* no uwb hardware present in system */
4606                 tp_features.uwb = 0;
4607                 dbg_printk(TPACPI_DBG_INIT,
4608                            "uwb hardware not installed\n");
4609         }
4610
4611         if (!tp_features.uwb)
4612                 return 1;
4613
4614         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4615                                 &uwb_tprfk_ops,
4616                                 RFKILL_TYPE_UWB,
4617                                 TPACPI_RFK_UWB_SW_NAME,
4618                                 false);
4619         return res;
4620 }
4621
4622 static struct ibm_struct uwb_driver_data = {
4623         .name = "uwb",
4624         .exit = uwb_exit,
4625         .flags.experimental = 1,
4626 };
4627
4628 /*************************************************************************
4629  * Video subdriver
4630  */
4631
4632 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4633
4634 enum video_access_mode {
4635         TPACPI_VIDEO_NONE = 0,
4636         TPACPI_VIDEO_570,       /* 570 */
4637         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4638         TPACPI_VIDEO_NEW,       /* all others */
4639 };
4640
4641 enum {  /* video status flags, based on VIDEO_570 */
4642         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4643         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4644         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4645 };
4646
4647 enum {  /* TPACPI_VIDEO_570 constants */
4648         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4649         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4650                                                  * video_status_flags */
4651         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4652         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4653 };
4654
4655 static enum video_access_mode video_supported;
4656 static int video_orig_autosw;
4657
4658 static int video_autosw_get(void);
4659 static int video_autosw_set(int enable);
4660
4661 TPACPI_HANDLE(vid, root,
4662               "\\_SB.PCI.AGP.VGA",      /* 570 */
4663               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4664               "\\_SB.PCI0.VID0",        /* 770e */
4665               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4666               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4667               "\\_SB.PCI0.AGP.VID",     /* all others */
4668         );                              /* R30, R31 */
4669
4670 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4671
4672 static int __init video_init(struct ibm_init_struct *iibm)
4673 {
4674         int ivga;
4675
4676         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4677
4678         TPACPI_ACPIHANDLE_INIT(vid);
4679         if (tpacpi_is_ibm())
4680                 TPACPI_ACPIHANDLE_INIT(vid2);
4681
4682         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4683                 /* G41, assume IVGA doesn't change */
4684                 vid_handle = vid2_handle;
4685
4686         if (!vid_handle)
4687                 /* video switching not supported on R30, R31 */
4688                 video_supported = TPACPI_VIDEO_NONE;
4689         else if (tpacpi_is_ibm() &&
4690                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4691                 /* 570 */
4692                 video_supported = TPACPI_VIDEO_570;
4693         else if (tpacpi_is_ibm() &&
4694                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4695                 /* 600e/x, 770e, 770x */
4696                 video_supported = TPACPI_VIDEO_770;
4697         else
4698                 /* all others */
4699                 video_supported = TPACPI_VIDEO_NEW;
4700
4701         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4702                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4703                 video_supported);
4704
4705         return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1;
4706 }
4707
4708 static void video_exit(void)
4709 {
4710         dbg_printk(TPACPI_DBG_EXIT,
4711                    "restoring original video autoswitch mode\n");
4712         if (video_autosw_set(video_orig_autosw))
4713                 pr_err("error while trying to restore original "
4714                         "video autoswitch mode\n");
4715 }
4716
4717 static int video_outputsw_get(void)
4718 {
4719         int status = 0;
4720         int i;
4721
4722         switch (video_supported) {
4723         case TPACPI_VIDEO_570:
4724                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4725                                  TP_ACPI_VIDEO_570_PHSCMD))
4726                         return -EIO;
4727                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4728                 break;
4729         case TPACPI_VIDEO_770:
4730                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4731                         return -EIO;
4732                 if (i)
4733                         status |= TP_ACPI_VIDEO_S_LCD;
4734                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4735                         return -EIO;
4736                 if (i)
4737                         status |= TP_ACPI_VIDEO_S_CRT;
4738                 break;
4739         case TPACPI_VIDEO_NEW:
4740                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4741                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4742                         return -EIO;
4743                 if (i)
4744                         status |= TP_ACPI_VIDEO_S_CRT;
4745
4746                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4747                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4748                         return -EIO;
4749                 if (i)
4750                         status |= TP_ACPI_VIDEO_S_LCD;
4751                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4752                         return -EIO;
4753                 if (i)
4754                         status |= TP_ACPI_VIDEO_S_DVI;
4755                 break;
4756         default:
4757                 return -ENOSYS;
4758         }
4759
4760         return status;
4761 }
4762
4763 static int video_outputsw_set(int status)
4764 {
4765         int autosw;
4766         int res = 0;
4767
4768         switch (video_supported) {
4769         case TPACPI_VIDEO_570:
4770                 res = acpi_evalf(NULL, NULL,
4771                                  "\\_SB.PHS2", "vdd",
4772                                  TP_ACPI_VIDEO_570_PHS2CMD,
4773                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4774                 break;
4775         case TPACPI_VIDEO_770:
4776                 autosw = video_autosw_get();
4777                 if (autosw < 0)
4778                         return autosw;
4779
4780                 res = video_autosw_set(1);
4781                 if (res)
4782                         return res;
4783                 res = acpi_evalf(vid_handle, NULL,
4784                                  "ASWT", "vdd", status * 0x100, 0);
4785                 if (!autosw && video_autosw_set(autosw)) {
4786                         pr_err("video auto-switch left enabled due to error\n");
4787                         return -EIO;
4788                 }
4789                 break;
4790         case TPACPI_VIDEO_NEW:
4791                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4792                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4793                 break;
4794         default:
4795                 return -ENOSYS;
4796         }
4797
4798         return (res) ? 0 : -EIO;
4799 }
4800
4801 static int video_autosw_get(void)
4802 {
4803         int autosw = 0;
4804
4805         switch (video_supported) {
4806         case TPACPI_VIDEO_570:
4807                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4808                         return -EIO;
4809                 break;
4810         case TPACPI_VIDEO_770:
4811         case TPACPI_VIDEO_NEW:
4812                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4813                         return -EIO;
4814                 break;
4815         default:
4816                 return -ENOSYS;
4817         }
4818
4819         return autosw & 1;
4820 }
4821
4822 static int video_autosw_set(int enable)
4823 {
4824         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
4825                 return -EIO;
4826         return 0;
4827 }
4828
4829 static int video_outputsw_cycle(void)
4830 {
4831         int autosw = video_autosw_get();
4832         int res;
4833
4834         if (autosw < 0)
4835                 return autosw;
4836
4837         switch (video_supported) {
4838         case TPACPI_VIDEO_570:
4839                 res = video_autosw_set(1);
4840                 if (res)
4841                         return res;
4842                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4843                 break;
4844         case TPACPI_VIDEO_770:
4845         case TPACPI_VIDEO_NEW:
4846                 res = video_autosw_set(1);
4847                 if (res)
4848                         return res;
4849                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4850                 break;
4851         default:
4852                 return -ENOSYS;
4853         }
4854         if (!autosw && video_autosw_set(autosw)) {
4855                 pr_err("video auto-switch left enabled due to error\n");
4856                 return -EIO;
4857         }
4858
4859         return (res) ? 0 : -EIO;
4860 }
4861
4862 static int video_expand_toggle(void)
4863 {
4864         switch (video_supported) {
4865         case TPACPI_VIDEO_570:
4866                 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
4867                         0 : -EIO;
4868         case TPACPI_VIDEO_770:
4869                 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
4870                         0 : -EIO;
4871         case TPACPI_VIDEO_NEW:
4872                 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
4873                         0 : -EIO;
4874         default:
4875                 return -ENOSYS;
4876         }
4877         /* not reached */
4878 }
4879
4880 static int video_read(struct seq_file *m)
4881 {
4882         int status, autosw;
4883
4884         if (video_supported == TPACPI_VIDEO_NONE) {
4885                 seq_printf(m, "status:\t\tnot supported\n");
4886                 return 0;
4887         }
4888
4889         /* Even reads can crash X.org, so... */
4890         if (!capable(CAP_SYS_ADMIN))
4891                 return -EPERM;
4892
4893         status = video_outputsw_get();
4894         if (status < 0)
4895                 return status;
4896
4897         autosw = video_autosw_get();
4898         if (autosw < 0)
4899                 return autosw;
4900
4901         seq_printf(m, "status:\t\tsupported\n");
4902         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4903         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4904         if (video_supported == TPACPI_VIDEO_NEW)
4905                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4906         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4907         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4908         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4909         if (video_supported == TPACPI_VIDEO_NEW)
4910                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4911         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4912         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4913
4914         return 0;
4915 }
4916
4917 static int video_write(char *buf)
4918 {
4919         char *cmd;
4920         int enable, disable, status;
4921         int res;
4922
4923         if (video_supported == TPACPI_VIDEO_NONE)
4924                 return -ENODEV;
4925
4926         /* Even reads can crash X.org, let alone writes... */
4927         if (!capable(CAP_SYS_ADMIN))
4928                 return -EPERM;
4929
4930         enable = 0;
4931         disable = 0;
4932
4933         while ((cmd = next_cmd(&buf))) {
4934                 if (strlencmp(cmd, "lcd_enable") == 0) {
4935                         enable |= TP_ACPI_VIDEO_S_LCD;
4936                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4937                         disable |= TP_ACPI_VIDEO_S_LCD;
4938                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4939                         enable |= TP_ACPI_VIDEO_S_CRT;
4940                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4941                         disable |= TP_ACPI_VIDEO_S_CRT;
4942                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4943                            strlencmp(cmd, "dvi_enable") == 0) {
4944                         enable |= TP_ACPI_VIDEO_S_DVI;
4945                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4946                            strlencmp(cmd, "dvi_disable") == 0) {
4947                         disable |= TP_ACPI_VIDEO_S_DVI;
4948                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4949                         res = video_autosw_set(1);
4950                         if (res)
4951                                 return res;
4952                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4953                         res = video_autosw_set(0);
4954                         if (res)
4955                                 return res;
4956                 } else if (strlencmp(cmd, "video_switch") == 0) {
4957                         res = video_outputsw_cycle();
4958                         if (res)
4959                                 return res;
4960                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4961                         res = video_expand_toggle();
4962                         if (res)
4963                                 return res;
4964                 } else
4965                         return -EINVAL;
4966         }
4967
4968         if (enable || disable) {
4969                 status = video_outputsw_get();
4970                 if (status < 0)
4971                         return status;
4972                 res = video_outputsw_set((status & ~disable) | enable);
4973                 if (res)
4974                         return res;
4975         }
4976
4977         return 0;
4978 }
4979
4980 static struct ibm_struct video_driver_data = {
4981         .name = "video",
4982         .read = video_read,
4983         .write = video_write,
4984         .exit = video_exit,
4985 };
4986
4987 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4988
4989 /*************************************************************************
4990  * Keyboard backlight subdriver
4991  */
4992
4993 static int kbdlight_set_level(int level)
4994 {
4995         if (!hkey_handle)
4996                 return -ENXIO;
4997
4998         if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
4999                 return -EIO;
5000
5001         return 0;
5002 }
5003
5004 static int kbdlight_get_level(void)
5005 {
5006         int status = 0;
5007
5008         if (!hkey_handle)
5009                 return -ENXIO;
5010
5011         if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5012                 return -EIO;
5013
5014         if (status < 0)
5015                 return status;
5016
5017         return status & 0x3;
5018 }
5019
5020 static bool kbdlight_is_supported(void)
5021 {
5022         int status = 0;
5023
5024         if (!hkey_handle)
5025                 return false;
5026
5027         if (!acpi_has_method(hkey_handle, "MLCG")) {
5028                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5029                 return false;
5030         }
5031
5032         if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5033                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5034                 return false;
5035         }
5036
5037         if (status < 0) {
5038                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5039                 return false;
5040         }
5041
5042         vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5043         /*
5044          * Guessed test for keyboard backlight:
5045          *
5046          * Machines with backlight keyboard return:
5047          *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5048          *   b110100010010000000XX - ThinkPad x230
5049          *   b010100000010000000XX - ThinkPad x240
5050          *   b010100000010000000XX - ThinkPad W541
5051          * (XX is current backlight level)
5052          *
5053          * Machines without backlight keyboard return:
5054          *   b10100001000000000000 - ThinkPad x230
5055          *   b10110001000000000000 - ThinkPad E430
5056          *   b00000000000000000000 - ThinkPad E450
5057          *
5058          * Candidate BITs for detection test (XOR):
5059          *   b01000000001000000000
5060          *              ^
5061          */
5062         return status & BIT(9);
5063 }
5064
5065 static void kbdlight_set_worker(struct work_struct *work)
5066 {
5067         struct tpacpi_led_classdev *data =
5068                         container_of(work, struct tpacpi_led_classdev, work);
5069
5070         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5071                 kbdlight_set_level(data->new_state);
5072 }
5073
5074 static void kbdlight_sysfs_set(struct led_classdev *led_cdev,
5075                         enum led_brightness brightness)
5076 {
5077         struct tpacpi_led_classdev *data =
5078                         container_of(led_cdev,
5079                                      struct tpacpi_led_classdev,
5080                                      led_classdev);
5081         data->new_state = brightness;
5082         queue_work(tpacpi_wq, &data->work);
5083 }
5084
5085 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5086 {
5087         int level;
5088
5089         level = kbdlight_get_level();
5090         if (level < 0)
5091                 return 0;
5092
5093         return level;
5094 }
5095
5096 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5097         .led_classdev = {
5098                 .name           = "tpacpi::kbd_backlight",
5099                 .max_brightness = 2,
5100                 .brightness_set = &kbdlight_sysfs_set,
5101                 .brightness_get = &kbdlight_sysfs_get,
5102                 .flags          = LED_CORE_SUSPENDRESUME,
5103         }
5104 };
5105
5106 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5107 {
5108         int rc;
5109
5110         vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5111
5112         TPACPI_ACPIHANDLE_INIT(hkey);
5113         INIT_WORK(&tpacpi_led_kbdlight.work, kbdlight_set_worker);
5114
5115         if (!kbdlight_is_supported()) {
5116                 tp_features.kbdlight = 0;
5117                 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5118                 return 1;
5119         }
5120
5121         tp_features.kbdlight = 1;
5122
5123         rc = led_classdev_register(&tpacpi_pdev->dev,
5124                                    &tpacpi_led_kbdlight.led_classdev);
5125         if (rc < 0) {
5126                 tp_features.kbdlight = 0;
5127                 return rc;
5128         }
5129
5130         return 0;
5131 }
5132
5133 static void kbdlight_exit(void)
5134 {
5135         if (tp_features.kbdlight)
5136                 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5137         flush_workqueue(tpacpi_wq);
5138 }
5139
5140 static int kbdlight_read(struct seq_file *m)
5141 {
5142         int level;
5143
5144         if (!tp_features.kbdlight) {
5145                 seq_printf(m, "status:\t\tnot supported\n");
5146         } else {
5147                 level = kbdlight_get_level();
5148                 if (level < 0)
5149                         seq_printf(m, "status:\t\terror %d\n", level);
5150                 else
5151                         seq_printf(m, "status:\t\t%d\n", level);
5152                 seq_printf(m, "commands:\t0, 1, 2\n");
5153         }
5154
5155         return 0;
5156 }
5157
5158 static int kbdlight_write(char *buf)
5159 {
5160         char *cmd;
5161         int level = -1;
5162
5163         if (!tp_features.kbdlight)
5164                 return -ENODEV;
5165
5166         while ((cmd = next_cmd(&buf))) {
5167                 if (strlencmp(cmd, "0") == 0)
5168                         level = 0;
5169                 else if (strlencmp(cmd, "1") == 0)
5170                         level = 1;
5171                 else if (strlencmp(cmd, "2") == 0)
5172                         level = 2;
5173                 else
5174                         return -EINVAL;
5175         }
5176
5177         if (level == -1)
5178                 return -EINVAL;
5179
5180         return kbdlight_set_level(level);
5181 }
5182
5183 static struct ibm_struct kbdlight_driver_data = {
5184         .name = "kbdlight",
5185         .read = kbdlight_read,
5186         .write = kbdlight_write,
5187         .exit = kbdlight_exit,
5188 };
5189
5190 /*************************************************************************
5191  * Light (thinklight) subdriver
5192  */
5193
5194 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
5195 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
5196
5197 static int light_get_status(void)
5198 {
5199         int status = 0;
5200
5201         if (tp_features.light_status) {
5202                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5203                         return -EIO;
5204                 return (!!status);
5205         }
5206
5207         return -ENXIO;
5208 }
5209
5210 static int light_set_status(int status)
5211 {
5212         int rc;
5213
5214         if (tp_features.light) {
5215                 if (cmos_handle) {
5216                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5217                                         (status) ?
5218                                                 TP_CMOS_THINKLIGHT_ON :
5219                                                 TP_CMOS_THINKLIGHT_OFF);
5220                 } else {
5221                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5222                                         (status) ? 1 : 0);
5223                 }
5224                 return (rc) ? 0 : -EIO;
5225         }
5226
5227         return -ENXIO;
5228 }
5229
5230 static void light_set_status_worker(struct work_struct *work)
5231 {
5232         struct tpacpi_led_classdev *data =
5233                         container_of(work, struct tpacpi_led_classdev, work);
5234
5235         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5236                 light_set_status((data->new_state != TPACPI_LED_OFF));
5237 }
5238
5239 static void light_sysfs_set(struct led_classdev *led_cdev,
5240                         enum led_brightness brightness)
5241 {
5242         struct tpacpi_led_classdev *data =
5243                 container_of(led_cdev,
5244                              struct tpacpi_led_classdev,
5245                              led_classdev);
5246         data->new_state = (brightness != LED_OFF) ?
5247                                 TPACPI_LED_ON : TPACPI_LED_OFF;
5248         queue_work(tpacpi_wq, &data->work);
5249 }
5250
5251 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5252 {
5253         return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5254 }
5255
5256 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5257         .led_classdev = {
5258                 .name           = "tpacpi::thinklight",
5259                 .brightness_set = &light_sysfs_set,
5260                 .brightness_get = &light_sysfs_get,
5261         }
5262 };
5263
5264 static int __init light_init(struct ibm_init_struct *iibm)
5265 {
5266         int rc;
5267
5268         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5269
5270         if (tpacpi_is_ibm()) {
5271                 TPACPI_ACPIHANDLE_INIT(ledb);
5272                 TPACPI_ACPIHANDLE_INIT(lght);
5273         }
5274         TPACPI_ACPIHANDLE_INIT(cmos);
5275         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
5276
5277         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5278         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5279
5280         if (tp_features.light)
5281                 /* light status not supported on
5282                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5283                 tp_features.light_status =
5284                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5285
5286         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5287                 str_supported(tp_features.light),
5288                 str_supported(tp_features.light_status));
5289
5290         if (!tp_features.light)
5291                 return 1;
5292
5293         rc = led_classdev_register(&tpacpi_pdev->dev,
5294                                    &tpacpi_led_thinklight.led_classdev);
5295
5296         if (rc < 0) {
5297                 tp_features.light = 0;
5298                 tp_features.light_status = 0;
5299         } else  {
5300                 rc = 0;
5301         }
5302
5303         return rc;
5304 }
5305
5306 static void light_exit(void)
5307 {
5308         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5309         flush_workqueue(tpacpi_wq);
5310 }
5311
5312 static int light_read(struct seq_file *m)
5313 {
5314         int status;
5315
5316         if (!tp_features.light) {
5317                 seq_printf(m, "status:\t\tnot supported\n");
5318         } else if (!tp_features.light_status) {
5319                 seq_printf(m, "status:\t\tunknown\n");
5320                 seq_printf(m, "commands:\ton, off\n");
5321         } else {
5322                 status = light_get_status();
5323                 if (status < 0)
5324                         return status;
5325                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
5326                 seq_printf(m, "commands:\ton, off\n");
5327         }
5328
5329         return 0;
5330 }
5331
5332 static int light_write(char *buf)
5333 {
5334         char *cmd;
5335         int newstatus = 0;
5336
5337         if (!tp_features.light)
5338                 return -ENODEV;
5339
5340         while ((cmd = next_cmd(&buf))) {
5341                 if (strlencmp(cmd, "on") == 0) {
5342                         newstatus = 1;
5343                 } else if (strlencmp(cmd, "off") == 0) {
5344                         newstatus = 0;
5345                 } else
5346                         return -EINVAL;
5347         }
5348
5349         return light_set_status(newstatus);
5350 }
5351
5352 static struct ibm_struct light_driver_data = {
5353         .name = "light",
5354         .read = light_read,
5355         .write = light_write,
5356         .exit = light_exit,
5357 };
5358
5359 /*************************************************************************
5360  * CMOS subdriver
5361  */
5362
5363 /* sysfs cmos_command -------------------------------------------------- */
5364 static ssize_t cmos_command_store(struct device *dev,
5365                             struct device_attribute *attr,
5366                             const char *buf, size_t count)
5367 {
5368         unsigned long cmos_cmd;
5369         int res;
5370
5371         if (parse_strtoul(buf, 21, &cmos_cmd))
5372                 return -EINVAL;
5373
5374         res = issue_thinkpad_cmos_command(cmos_cmd);
5375         return (res) ? res : count;
5376 }
5377
5378 static DEVICE_ATTR_WO(cmos_command);
5379
5380 /* --------------------------------------------------------------------- */
5381
5382 static int __init cmos_init(struct ibm_init_struct *iibm)
5383 {
5384         int res;
5385
5386         vdbg_printk(TPACPI_DBG_INIT,
5387                 "initializing cmos commands subdriver\n");
5388
5389         TPACPI_ACPIHANDLE_INIT(cmos);
5390
5391         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5392                 str_supported(cmos_handle != NULL));
5393
5394         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5395         if (res)
5396                 return res;
5397
5398         return (cmos_handle) ? 0 : 1;
5399 }
5400
5401 static void cmos_exit(void)
5402 {
5403         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
5404 }
5405
5406 static int cmos_read(struct seq_file *m)
5407 {
5408         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5409            R30, R31, T20-22, X20-21 */
5410         if (!cmos_handle)
5411                 seq_printf(m, "status:\t\tnot supported\n");
5412         else {
5413                 seq_printf(m, "status:\t\tsupported\n");
5414                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5415         }
5416
5417         return 0;
5418 }
5419
5420 static int cmos_write(char *buf)
5421 {
5422         char *cmd;
5423         int cmos_cmd, res;
5424
5425         while ((cmd = next_cmd(&buf))) {
5426                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5427                     cmos_cmd >= 0 && cmos_cmd <= 21) {
5428                         /* cmos_cmd set */
5429                 } else
5430                         return -EINVAL;
5431
5432                 res = issue_thinkpad_cmos_command(cmos_cmd);
5433                 if (res)
5434                         return res;
5435         }
5436
5437         return 0;
5438 }
5439
5440 static struct ibm_struct cmos_driver_data = {
5441         .name = "cmos",
5442         .read = cmos_read,
5443         .write = cmos_write,
5444         .exit = cmos_exit,
5445 };
5446
5447 /*************************************************************************
5448  * LED subdriver
5449  */
5450
5451 enum led_access_mode {
5452         TPACPI_LED_NONE = 0,
5453         TPACPI_LED_570, /* 570 */
5454         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5455         TPACPI_LED_NEW, /* all others */
5456 };
5457
5458 enum {  /* For TPACPI_LED_OLD */
5459         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
5460         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
5461         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
5462 };
5463
5464 static enum led_access_mode led_supported;
5465
5466 static acpi_handle led_handle;
5467
5468 #define TPACPI_LED_NUMLEDS 16
5469 static struct tpacpi_led_classdev *tpacpi_leds;
5470 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5471 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5472         /* there's a limit of 19 chars + NULL before 2.6.26 */
5473         "tpacpi::power",
5474         "tpacpi:orange:batt",
5475         "tpacpi:green:batt",
5476         "tpacpi::dock_active",
5477         "tpacpi::bay_active",
5478         "tpacpi::dock_batt",
5479         "tpacpi::unknown_led",
5480         "tpacpi::standby",
5481         "tpacpi::dock_status1",
5482         "tpacpi::dock_status2",
5483         "tpacpi::unknown_led2",
5484         "tpacpi::unknown_led3",
5485         "tpacpi::thinkvantage",
5486 };
5487 #define TPACPI_SAFE_LEDS        0x1081U
5488
5489 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5490 {
5491 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5492         return false;
5493 #else
5494         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5495 #endif
5496 }
5497
5498 static int led_get_status(const unsigned int led)
5499 {
5500         int status;
5501         enum led_status_t led_s;
5502
5503         switch (led_supported) {
5504         case TPACPI_LED_570:
5505                 if (!acpi_evalf(ec_handle,
5506                                 &status, "GLED", "dd", 1 << led))
5507                         return -EIO;
5508                 led_s = (status == 0) ?
5509                                 TPACPI_LED_OFF :
5510                                 ((status == 1) ?
5511                                         TPACPI_LED_ON :
5512                                         TPACPI_LED_BLINK);
5513                 tpacpi_led_state_cache[led] = led_s;
5514                 return led_s;
5515         default:
5516                 return -ENXIO;
5517         }
5518
5519         /* not reached */
5520 }
5521
5522 static int led_set_status(const unsigned int led,
5523                           const enum led_status_t ledstatus)
5524 {
5525         /* off, on, blink. Index is led_status_t */
5526         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5527         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5528
5529         int rc = 0;
5530
5531         switch (led_supported) {
5532         case TPACPI_LED_570:
5533                 /* 570 */
5534                 if (unlikely(led > 7))
5535                         return -EINVAL;
5536                 if (unlikely(tpacpi_is_led_restricted(led)))
5537                         return -EPERM;
5538                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5539                                 (1 << led), led_sled_arg1[ledstatus]))
5540                         rc = -EIO;
5541                 break;
5542         case TPACPI_LED_OLD:
5543                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5544                 if (unlikely(led > 7))
5545                         return -EINVAL;
5546                 if (unlikely(tpacpi_is_led_restricted(led)))
5547                         return -EPERM;
5548                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5549                 if (rc >= 0)
5550                         rc = ec_write(TPACPI_LED_EC_HLBL,
5551                                       (ledstatus == TPACPI_LED_BLINK) << led);
5552                 if (rc >= 0)
5553                         rc = ec_write(TPACPI_LED_EC_HLCL,
5554                                       (ledstatus != TPACPI_LED_OFF) << led);
5555                 break;
5556         case TPACPI_LED_NEW:
5557                 /* all others */
5558                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5559                         return -EINVAL;
5560                 if (unlikely(tpacpi_is_led_restricted(led)))
5561                         return -EPERM;
5562                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5563                                 led, led_led_arg1[ledstatus]))
5564                         rc = -EIO;
5565                 break;
5566         default:
5567                 rc = -ENXIO;
5568         }
5569
5570         if (!rc)
5571                 tpacpi_led_state_cache[led] = ledstatus;
5572
5573         return rc;
5574 }
5575
5576 static void led_set_status_worker(struct work_struct *work)
5577 {
5578         struct tpacpi_led_classdev *data =
5579                 container_of(work, struct tpacpi_led_classdev, work);
5580
5581         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5582                 led_set_status(data->led, data->new_state);
5583 }
5584
5585 static void led_sysfs_set(struct led_classdev *led_cdev,
5586                         enum led_brightness brightness)
5587 {
5588         struct tpacpi_led_classdev *data = container_of(led_cdev,
5589                              struct tpacpi_led_classdev, led_classdev);
5590
5591         if (brightness == LED_OFF)
5592                 data->new_state = TPACPI_LED_OFF;
5593         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5594                 data->new_state = TPACPI_LED_ON;
5595         else
5596                 data->new_state = TPACPI_LED_BLINK;
5597
5598         queue_work(tpacpi_wq, &data->work);
5599 }
5600
5601 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5602                         unsigned long *delay_on, unsigned long *delay_off)
5603 {
5604         struct tpacpi_led_classdev *data = container_of(led_cdev,
5605                              struct tpacpi_led_classdev, led_classdev);
5606
5607         /* Can we choose the flash rate? */
5608         if (*delay_on == 0 && *delay_off == 0) {
5609                 /* yes. set them to the hardware blink rate (1 Hz) */
5610                 *delay_on = 500; /* ms */
5611                 *delay_off = 500; /* ms */
5612         } else if ((*delay_on != 500) || (*delay_off != 500))
5613                 return -EINVAL;
5614
5615         data->new_state = TPACPI_LED_BLINK;
5616         queue_work(tpacpi_wq, &data->work);
5617
5618         return 0;
5619 }
5620
5621 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5622 {
5623         int rc;
5624
5625         struct tpacpi_led_classdev *data = container_of(led_cdev,
5626                              struct tpacpi_led_classdev, led_classdev);
5627
5628         rc = led_get_status(data->led);
5629
5630         if (rc == TPACPI_LED_OFF || rc < 0)
5631                 rc = LED_OFF;   /* no error handling in led class :( */
5632         else
5633                 rc = LED_FULL;
5634
5635         return rc;
5636 }
5637
5638 static void led_exit(void)
5639 {
5640         unsigned int i;
5641
5642         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5643                 if (tpacpi_leds[i].led_classdev.name)
5644                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5645         }
5646
5647         flush_workqueue(tpacpi_wq);
5648         kfree(tpacpi_leds);
5649 }
5650
5651 static int __init tpacpi_init_led(unsigned int led)
5652 {
5653         int rc;
5654
5655         tpacpi_leds[led].led = led;
5656
5657         /* LEDs with no name don't get registered */
5658         if (!tpacpi_led_names[led])
5659                 return 0;
5660
5661         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5662         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5663         if (led_supported == TPACPI_LED_570)
5664                 tpacpi_leds[led].led_classdev.brightness_get =
5665                                                 &led_sysfs_get;
5666
5667         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5668
5669         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5670
5671         rc = led_classdev_register(&tpacpi_pdev->dev,
5672                                 &tpacpi_leds[led].led_classdev);
5673         if (rc < 0)
5674                 tpacpi_leds[led].led_classdev.name = NULL;
5675
5676         return rc;
5677 }
5678
5679 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5680         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5681         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5682         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5683
5684         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5685         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5686         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5687         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5688         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5689         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5690         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5691         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5692
5693         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5694         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5695         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5696         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5697         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5698
5699         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5700         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5701         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5702         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5703
5704         /* (1) - may have excess leds enabled on MSB */
5705
5706         /* Defaults (order matters, keep last, don't reorder!) */
5707         { /* Lenovo */
5708           .vendor = PCI_VENDOR_ID_LENOVO,
5709           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5710           .quirks = 0x1fffU,
5711         },
5712         { /* IBM ThinkPads with no EC version string */
5713           .vendor = PCI_VENDOR_ID_IBM,
5714           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5715           .quirks = 0x00ffU,
5716         },
5717         { /* IBM ThinkPads with EC version string */
5718           .vendor = PCI_VENDOR_ID_IBM,
5719           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5720           .quirks = 0x00bfU,
5721         },
5722 };
5723
5724 #undef TPACPI_LEDQ_IBM
5725 #undef TPACPI_LEDQ_LNV
5726
5727 static enum led_access_mode __init led_init_detect_mode(void)
5728 {
5729         acpi_status status;
5730
5731         if (tpacpi_is_ibm()) {
5732                 /* 570 */
5733                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5734                 if (ACPI_SUCCESS(status))
5735                         return TPACPI_LED_570;
5736
5737                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5738                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5739                 if (ACPI_SUCCESS(status))
5740                         return TPACPI_LED_OLD;
5741         }
5742
5743         /* most others */
5744         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5745         if (ACPI_SUCCESS(status))
5746                 return TPACPI_LED_NEW;
5747
5748         /* R30, R31, and unknown firmwares */
5749         led_handle = NULL;
5750         return TPACPI_LED_NONE;
5751 }
5752
5753 static int __init led_init(struct ibm_init_struct *iibm)
5754 {
5755         unsigned int i;
5756         int rc;
5757         unsigned long useful_leds;
5758
5759         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5760
5761         led_supported = led_init_detect_mode();
5762
5763         if (led_supported != TPACPI_LED_NONE) {
5764                 useful_leds = tpacpi_check_quirks(led_useful_qtable,
5765                                 ARRAY_SIZE(led_useful_qtable));
5766
5767                 if (!useful_leds) {
5768                         led_handle = NULL;
5769                         led_supported = TPACPI_LED_NONE;
5770                 }
5771         }
5772
5773         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5774                 str_supported(led_supported), led_supported);
5775
5776         if (led_supported == TPACPI_LED_NONE)
5777                 return 1;
5778
5779         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5780                               GFP_KERNEL);
5781         if (!tpacpi_leds) {
5782                 pr_err("Out of memory for LED data\n");
5783                 return -ENOMEM;
5784         }
5785
5786         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5787                 tpacpi_leds[i].led = -1;
5788
5789                 if (!tpacpi_is_led_restricted(i) &&
5790                     test_bit(i, &useful_leds)) {
5791                         rc = tpacpi_init_led(i);
5792                         if (rc < 0) {
5793                                 led_exit();
5794                                 return rc;
5795                         }
5796                 }
5797         }
5798
5799 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5800         pr_notice("warning: userspace override of important "
5801                   "firmware LEDs is enabled\n");
5802 #endif
5803         return 0;
5804 }
5805
5806 #define str_led_status(s) \
5807         ((s) == TPACPI_LED_OFF ? "off" : \
5808                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5809
5810 static int led_read(struct seq_file *m)
5811 {
5812         if (!led_supported) {
5813                 seq_printf(m, "status:\t\tnot supported\n");
5814                 return 0;
5815         }
5816         seq_printf(m, "status:\t\tsupported\n");
5817
5818         if (led_supported == TPACPI_LED_570) {
5819                 /* 570 */
5820                 int i, status;
5821                 for (i = 0; i < 8; i++) {
5822                         status = led_get_status(i);
5823                         if (status < 0)
5824                                 return -EIO;
5825                         seq_printf(m, "%d:\t\t%s\n",
5826                                        i, str_led_status(status));
5827                 }
5828         }
5829
5830         seq_printf(m, "commands:\t"
5831                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5832
5833         return 0;
5834 }
5835
5836 static int led_write(char *buf)
5837 {
5838         char *cmd;
5839         int led, rc;
5840         enum led_status_t s;
5841
5842         if (!led_supported)
5843                 return -ENODEV;
5844
5845         while ((cmd = next_cmd(&buf))) {
5846                 if (sscanf(cmd, "%d", &led) != 1)
5847                         return -EINVAL;
5848
5849                 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) ||
5850                                 tpacpi_leds[led].led < 0)
5851                         return -ENODEV;
5852
5853                 if (strstr(cmd, "off")) {
5854                         s = TPACPI_LED_OFF;
5855                 } else if (strstr(cmd, "on")) {
5856                         s = TPACPI_LED_ON;
5857                 } else if (strstr(cmd, "blink")) {
5858                         s = TPACPI_LED_BLINK;
5859                 } else {
5860                         return -EINVAL;
5861                 }
5862
5863                 rc = led_set_status(led, s);
5864                 if (rc < 0)
5865                         return rc;
5866         }
5867
5868         return 0;
5869 }
5870
5871 static struct ibm_struct led_driver_data = {
5872         .name = "led",
5873         .read = led_read,
5874         .write = led_write,
5875         .exit = led_exit,
5876 };
5877
5878 /*************************************************************************
5879  * Beep subdriver
5880  */
5881
5882 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5883
5884 #define TPACPI_BEEP_Q1 0x0001
5885
5886 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5887         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5888         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5889 };
5890
5891 static int __init beep_init(struct ibm_init_struct *iibm)
5892 {
5893         unsigned long quirks;
5894
5895         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5896
5897         TPACPI_ACPIHANDLE_INIT(beep);
5898
5899         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5900                 str_supported(beep_handle != NULL));
5901
5902         quirks = tpacpi_check_quirks(beep_quirk_table,
5903                                      ARRAY_SIZE(beep_quirk_table));
5904
5905         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5906
5907         return (beep_handle) ? 0 : 1;
5908 }
5909
5910 static int beep_read(struct seq_file *m)
5911 {
5912         if (!beep_handle)
5913                 seq_printf(m, "status:\t\tnot supported\n");
5914         else {
5915                 seq_printf(m, "status:\t\tsupported\n");
5916                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5917         }
5918
5919         return 0;
5920 }
5921
5922 static int beep_write(char *buf)
5923 {
5924         char *cmd;
5925         int beep_cmd;
5926
5927         if (!beep_handle)
5928                 return -ENODEV;
5929
5930         while ((cmd = next_cmd(&buf))) {
5931                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5932                     beep_cmd >= 0 && beep_cmd <= 17) {
5933                         /* beep_cmd set */
5934                 } else
5935                         return -EINVAL;
5936                 if (tp_features.beep_needs_two_args) {
5937                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5938                                         beep_cmd, 0))
5939                                 return -EIO;
5940                 } else {
5941                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5942                                         beep_cmd))
5943                                 return -EIO;
5944                 }
5945         }
5946
5947         return 0;
5948 }
5949
5950 static struct ibm_struct beep_driver_data = {
5951         .name = "beep",
5952         .read = beep_read,
5953         .write = beep_write,
5954 };
5955
5956 /*************************************************************************
5957  * Thermal subdriver
5958  */
5959
5960 enum thermal_access_mode {
5961         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5962         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5963         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5964         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5965         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5966 };
5967
5968 enum { /* TPACPI_THERMAL_TPEC_* */
5969         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5970         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5971         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5972
5973         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5974 };
5975
5976
5977 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5978 struct ibm_thermal_sensors_struct {
5979         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5980 };
5981
5982 static enum thermal_access_mode thermal_read_mode;
5983
5984 /* idx is zero-based */
5985 static int thermal_get_sensor(int idx, s32 *value)
5986 {
5987         int t;
5988         s8 tmp;
5989         char tmpi[5];
5990
5991         t = TP_EC_THERMAL_TMP0;
5992
5993         switch (thermal_read_mode) {
5994 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5995         case TPACPI_THERMAL_TPEC_16:
5996                 if (idx >= 8 && idx <= 15) {
5997                         t = TP_EC_THERMAL_TMP8;
5998                         idx -= 8;
5999                 }
6000                 /* fallthrough */
6001 #endif
6002         case TPACPI_THERMAL_TPEC_8:
6003                 if (idx <= 7) {
6004                         if (!acpi_ec_read(t + idx, &tmp))
6005                                 return -EIO;
6006                         *value = tmp * 1000;
6007                         return 0;
6008                 }
6009                 break;
6010
6011         case TPACPI_THERMAL_ACPI_UPDT:
6012                 if (idx <= 7) {
6013                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6014                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6015                                 return -EIO;
6016                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6017                                 return -EIO;
6018                         *value = (t - 2732) * 100;
6019                         return 0;
6020                 }
6021                 break;
6022
6023         case TPACPI_THERMAL_ACPI_TMP07:
6024                 if (idx <= 7) {
6025                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6026                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6027                                 return -EIO;
6028                         if (t > 127 || t < -127)
6029                                 t = TP_EC_THERMAL_TMP_NA;
6030                         *value = t * 1000;
6031                         return 0;
6032                 }
6033                 break;
6034
6035         case TPACPI_THERMAL_NONE:
6036         default:
6037                 return -ENOSYS;
6038         }
6039
6040         return -EINVAL;
6041 }
6042
6043 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6044 {
6045         int res, i;
6046         int n;
6047
6048         n = 8;
6049         i = 0;
6050
6051         if (!s)
6052                 return -EINVAL;
6053
6054         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6055                 n = 16;
6056
6057         for (i = 0 ; i < n; i++) {
6058                 res = thermal_get_sensor(i, &s->temp[i]);
6059                 if (res)
6060                         return res;
6061         }
6062
6063         return n;
6064 }
6065
6066 static void thermal_dump_all_sensors(void)
6067 {
6068         int n, i;
6069         struct ibm_thermal_sensors_struct t;
6070
6071         n = thermal_get_sensors(&t);
6072         if (n <= 0)
6073                 return;
6074
6075         pr_notice("temperatures (Celsius):");
6076
6077         for (i = 0; i < n; i++) {
6078                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6079                         pr_cont(" %d", (int)(t.temp[i] / 1000));
6080                 else
6081                         pr_cont(" N/A");
6082         }
6083
6084         pr_cont("\n");
6085 }
6086
6087 /* sysfs temp##_input -------------------------------------------------- */
6088
6089 static ssize_t thermal_temp_input_show(struct device *dev,
6090                            struct device_attribute *attr,
6091                            char *buf)
6092 {
6093         struct sensor_device_attribute *sensor_attr =
6094                                         to_sensor_dev_attr(attr);
6095         int idx = sensor_attr->index;
6096         s32 value;
6097         int res;
6098
6099         res = thermal_get_sensor(idx, &value);
6100         if (res)
6101                 return res;
6102         if (value == TPACPI_THERMAL_SENSOR_NA)
6103                 return -ENXIO;
6104
6105         return snprintf(buf, PAGE_SIZE, "%d\n", value);
6106 }
6107
6108 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6109          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6110                      thermal_temp_input_show, NULL, _idxB)
6111
6112 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6113         THERMAL_SENSOR_ATTR_TEMP(1, 0),
6114         THERMAL_SENSOR_ATTR_TEMP(2, 1),
6115         THERMAL_SENSOR_ATTR_TEMP(3, 2),
6116         THERMAL_SENSOR_ATTR_TEMP(4, 3),
6117         THERMAL_SENSOR_ATTR_TEMP(5, 4),
6118         THERMAL_SENSOR_ATTR_TEMP(6, 5),
6119         THERMAL_SENSOR_ATTR_TEMP(7, 6),
6120         THERMAL_SENSOR_ATTR_TEMP(8, 7),
6121         THERMAL_SENSOR_ATTR_TEMP(9, 8),
6122         THERMAL_SENSOR_ATTR_TEMP(10, 9),
6123         THERMAL_SENSOR_ATTR_TEMP(11, 10),
6124         THERMAL_SENSOR_ATTR_TEMP(12, 11),
6125         THERMAL_SENSOR_ATTR_TEMP(13, 12),
6126         THERMAL_SENSOR_ATTR_TEMP(14, 13),
6127         THERMAL_SENSOR_ATTR_TEMP(15, 14),
6128         THERMAL_SENSOR_ATTR_TEMP(16, 15),
6129 };
6130
6131 #define THERMAL_ATTRS(X) \
6132         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6133
6134 static struct attribute *thermal_temp_input_attr[] = {
6135         THERMAL_ATTRS(8),
6136         THERMAL_ATTRS(9),
6137         THERMAL_ATTRS(10),
6138         THERMAL_ATTRS(11),
6139         THERMAL_ATTRS(12),
6140         THERMAL_ATTRS(13),
6141         THERMAL_ATTRS(14),
6142         THERMAL_ATTRS(15),
6143         THERMAL_ATTRS(0),
6144         THERMAL_ATTRS(1),
6145         THERMAL_ATTRS(2),
6146         THERMAL_ATTRS(3),
6147         THERMAL_ATTRS(4),
6148         THERMAL_ATTRS(5),
6149         THERMAL_ATTRS(6),
6150         THERMAL_ATTRS(7),
6151         NULL
6152 };
6153
6154 static const struct attribute_group thermal_temp_input16_group = {
6155         .attrs = thermal_temp_input_attr
6156 };
6157
6158 static const struct attribute_group thermal_temp_input8_group = {
6159         .attrs = &thermal_temp_input_attr[8]
6160 };
6161
6162 #undef THERMAL_SENSOR_ATTR_TEMP
6163 #undef THERMAL_ATTRS
6164
6165 /* --------------------------------------------------------------------- */
6166
6167 static int __init thermal_init(struct ibm_init_struct *iibm)
6168 {
6169         u8 t, ta1, ta2;
6170         int i;
6171         int acpi_tmp7;
6172         int res;
6173
6174         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6175
6176         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6177
6178         if (thinkpad_id.ec_model) {
6179                 /*
6180                  * Direct EC access mode: sensors at registers
6181                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6182                  * non-implemented, thermal sensors return 0x80 when
6183                  * not available
6184                  */
6185
6186                 ta1 = ta2 = 0;
6187                 for (i = 0; i < 8; i++) {
6188                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6189                                 ta1 |= t;
6190                         } else {
6191                                 ta1 = 0;
6192                                 break;
6193                         }
6194                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6195                                 ta2 |= t;
6196                         } else {
6197                                 ta1 = 0;
6198                                 break;
6199                         }
6200                 }
6201                 if (ta1 == 0) {
6202                         /* This is sheer paranoia, but we handle it anyway */
6203                         if (acpi_tmp7) {
6204                                 pr_err("ThinkPad ACPI EC access misbehaving, "
6205                                        "falling back to ACPI TMPx access "
6206                                        "mode\n");
6207                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6208                         } else {
6209                                 pr_err("ThinkPad ACPI EC access misbehaving, "
6210                                        "disabling thermal sensors access\n");
6211                                 thermal_read_mode = TPACPI_THERMAL_NONE;
6212                         }
6213                 } else {
6214                         thermal_read_mode =
6215                             (ta2 != 0) ?
6216                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6217                 }
6218         } else if (acpi_tmp7) {
6219                 if (tpacpi_is_ibm() &&
6220                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6221                         /* 600e/x, 770e, 770x */
6222                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6223                 } else {
6224                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6225                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6226                 }
6227         } else {
6228                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
6229                 thermal_read_mode = TPACPI_THERMAL_NONE;
6230         }
6231
6232         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6233                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6234                 thermal_read_mode);
6235
6236         switch (thermal_read_mode) {
6237         case TPACPI_THERMAL_TPEC_16:
6238                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6239                                 &thermal_temp_input16_group);
6240                 if (res)
6241                         return res;
6242                 break;
6243         case TPACPI_THERMAL_TPEC_8:
6244         case TPACPI_THERMAL_ACPI_TMP07:
6245         case TPACPI_THERMAL_ACPI_UPDT:
6246                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6247                                 &thermal_temp_input8_group);
6248                 if (res)
6249                         return res;
6250                 break;
6251         case TPACPI_THERMAL_NONE:
6252         default:
6253                 return 1;
6254         }
6255
6256         return 0;
6257 }
6258
6259 static void thermal_exit(void)
6260 {
6261         switch (thermal_read_mode) {
6262         case TPACPI_THERMAL_TPEC_16:
6263                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6264                                    &thermal_temp_input16_group);
6265                 break;
6266         case TPACPI_THERMAL_TPEC_8:
6267         case TPACPI_THERMAL_ACPI_TMP07:
6268         case TPACPI_THERMAL_ACPI_UPDT:
6269                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6270                                    &thermal_temp_input8_group);
6271                 break;
6272         case TPACPI_THERMAL_NONE:
6273         default:
6274                 break;
6275         }
6276 }
6277
6278 static int thermal_read(struct seq_file *m)
6279 {
6280         int n, i;
6281         struct ibm_thermal_sensors_struct t;
6282
6283         n = thermal_get_sensors(&t);
6284         if (unlikely(n < 0))
6285                 return n;
6286
6287         seq_printf(m, "temperatures:\t");
6288
6289         if (n > 0) {
6290                 for (i = 0; i < (n - 1); i++)
6291                         seq_printf(m, "%d ", t.temp[i] / 1000);
6292                 seq_printf(m, "%d\n", t.temp[i] / 1000);
6293         } else
6294                 seq_printf(m, "not supported\n");
6295
6296         return 0;
6297 }
6298
6299 static struct ibm_struct thermal_driver_data = {
6300         .name = "thermal",
6301         .read = thermal_read,
6302         .exit = thermal_exit,
6303 };
6304
6305 /*************************************************************************
6306  * Backlight/brightness subdriver
6307  */
6308
6309 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6310
6311 /*
6312  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6313  * CMOS NVRAM byte 0x5E, bits 0-3.
6314  *
6315  * EC HBRV (0x31) has the following layout
6316  *   Bit 7: unknown function
6317  *   Bit 6: unknown function
6318  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6319  *   Bit 4: must be set to zero to avoid problems
6320  *   Bit 3-0: backlight brightness level
6321  *
6322  * brightness_get_raw returns status data in the HBRV layout
6323  *
6324  * WARNING: The X61 has been verified to use HBRV for something else, so
6325  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6326  * testing on the very early *60 Lenovo models...
6327  */
6328
6329 enum {
6330         TP_EC_BACKLIGHT = 0x31,
6331
6332         /* TP_EC_BACKLIGHT bitmasks */
6333         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6334         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6335         TP_EC_BACKLIGHT_MAPSW = 0x20,
6336 };
6337
6338 enum tpacpi_brightness_access_mode {
6339         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
6340         TPACPI_BRGHT_MODE_EC,           /* EC control */
6341         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
6342         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
6343         TPACPI_BRGHT_MODE_MAX
6344 };
6345
6346 static struct backlight_device *ibm_backlight_device;
6347
6348 static enum tpacpi_brightness_access_mode brightness_mode =
6349                 TPACPI_BRGHT_MODE_MAX;
6350
6351 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6352
6353 static struct mutex brightness_mutex;
6354
6355 /* NVRAM brightness access,
6356  * call with brightness_mutex held! */
6357 static unsigned int tpacpi_brightness_nvram_get(void)
6358 {
6359         u8 lnvram;
6360
6361         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6362                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6363                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6364         lnvram &= bright_maxlvl;
6365
6366         return lnvram;
6367 }
6368
6369 static void tpacpi_brightness_checkpoint_nvram(void)
6370 {
6371         u8 lec = 0;
6372         u8 b_nvram;
6373
6374         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6375                 return;
6376
6377         vdbg_printk(TPACPI_DBG_BRGHT,
6378                 "trying to checkpoint backlight level to NVRAM...\n");
6379
6380         if (mutex_lock_killable(&brightness_mutex) < 0)
6381                 return;
6382
6383         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6384                 goto unlock;
6385         lec &= TP_EC_BACKLIGHT_LVLMSK;
6386         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6387
6388         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6389                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6390                 /* NVRAM needs update */
6391                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6392                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6393                 b_nvram |= lec;
6394                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6395                 dbg_printk(TPACPI_DBG_BRGHT,
6396                            "updated NVRAM backlight level to %u (0x%02x)\n",
6397                            (unsigned int) lec, (unsigned int) b_nvram);
6398         } else
6399                 vdbg_printk(TPACPI_DBG_BRGHT,
6400                            "NVRAM backlight level already is %u (0x%02x)\n",
6401                            (unsigned int) lec, (unsigned int) b_nvram);
6402
6403 unlock:
6404         mutex_unlock(&brightness_mutex);
6405 }
6406
6407
6408 /* call with brightness_mutex held! */
6409 static int tpacpi_brightness_get_raw(int *status)
6410 {
6411         u8 lec = 0;
6412
6413         switch (brightness_mode) {
6414         case TPACPI_BRGHT_MODE_UCMS_STEP:
6415                 *status = tpacpi_brightness_nvram_get();
6416                 return 0;
6417         case TPACPI_BRGHT_MODE_EC:
6418         case TPACPI_BRGHT_MODE_ECNVRAM:
6419                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6420                         return -EIO;
6421                 *status = lec;
6422                 return 0;
6423         default:
6424                 return -ENXIO;
6425         }
6426 }
6427
6428 /* call with brightness_mutex held! */
6429 /* do NOT call with illegal backlight level value */
6430 static int tpacpi_brightness_set_ec(unsigned int value)
6431 {
6432         u8 lec = 0;
6433
6434         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6435                 return -EIO;
6436
6437         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6438                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6439                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6440                 return -EIO;
6441
6442         return 0;
6443 }
6444
6445 /* call with brightness_mutex held! */
6446 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6447 {
6448         int cmos_cmd, inc;
6449         unsigned int current_value, i;
6450
6451         current_value = tpacpi_brightness_nvram_get();
6452
6453         if (value == current_value)
6454                 return 0;
6455
6456         cmos_cmd = (value > current_value) ?
6457                         TP_CMOS_BRIGHTNESS_UP :
6458                         TP_CMOS_BRIGHTNESS_DOWN;
6459         inc = (value > current_value) ? 1 : -1;
6460
6461         for (i = current_value; i != value; i += inc)
6462                 if (issue_thinkpad_cmos_command(cmos_cmd))
6463                         return -EIO;
6464
6465         return 0;
6466 }
6467
6468 /* May return EINTR which can always be mapped to ERESTARTSYS */
6469 static int brightness_set(unsigned int value)
6470 {
6471         int res;
6472
6473         if (value > bright_maxlvl)
6474                 return -EINVAL;
6475
6476         vdbg_printk(TPACPI_DBG_BRGHT,
6477                         "set backlight level to %d\n", value);
6478
6479         res = mutex_lock_killable(&brightness_mutex);
6480         if (res < 0)
6481                 return res;
6482
6483         switch (brightness_mode) {
6484         case TPACPI_BRGHT_MODE_EC:
6485         case TPACPI_BRGHT_MODE_ECNVRAM:
6486                 res = tpacpi_brightness_set_ec(value);
6487                 break;
6488         case TPACPI_BRGHT_MODE_UCMS_STEP:
6489                 res = tpacpi_brightness_set_ucmsstep(value);
6490                 break;
6491         default:
6492                 res = -ENXIO;
6493         }
6494
6495         mutex_unlock(&brightness_mutex);
6496         return res;
6497 }
6498
6499 /* sysfs backlight class ----------------------------------------------- */
6500
6501 static int brightness_update_status(struct backlight_device *bd)
6502 {
6503         unsigned int level =
6504                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6505                  bd->props.power == FB_BLANK_UNBLANK) ?
6506                                 bd->props.brightness : 0;
6507
6508         dbg_printk(TPACPI_DBG_BRGHT,
6509                         "backlight: attempt to set level to %d\n",
6510                         level);
6511
6512         /* it is the backlight class's job (caller) to handle
6513          * EINTR and other errors properly */
6514         return brightness_set(level);
6515 }
6516
6517 static int brightness_get(struct backlight_device *bd)
6518 {
6519         int status, res;
6520
6521         res = mutex_lock_killable(&brightness_mutex);
6522         if (res < 0)
6523                 return 0;
6524
6525         res = tpacpi_brightness_get_raw(&status);
6526
6527         mutex_unlock(&brightness_mutex);
6528
6529         if (res < 0)
6530                 return 0;
6531
6532         return status & TP_EC_BACKLIGHT_LVLMSK;
6533 }
6534
6535 static void tpacpi_brightness_notify_change(void)
6536 {
6537         backlight_force_update(ibm_backlight_device,
6538                                BACKLIGHT_UPDATE_HOTKEY);
6539 }
6540
6541 static const struct backlight_ops ibm_backlight_data = {
6542         .get_brightness = brightness_get,
6543         .update_status  = brightness_update_status,
6544 };
6545
6546 /* --------------------------------------------------------------------- */
6547
6548 /*
6549  * Call _BCL method of video device.  On some ThinkPads this will
6550  * switch the firmware to the ACPI brightness control mode.
6551  */
6552
6553 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6554 {
6555         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6556         union acpi_object *obj;
6557         struct acpi_device *device, *child;
6558         int rc;
6559
6560         if (acpi_bus_get_device(handle, &device))
6561                 return 0;
6562
6563         rc = 0;
6564         list_for_each_entry(child, &device->children, node) {
6565                 acpi_status status = acpi_evaluate_object(child->handle, "_BCL",
6566                                                           NULL, &buffer);
6567                 if (ACPI_FAILURE(status))
6568                         continue;
6569
6570                 obj = (union acpi_object *)buffer.pointer;
6571                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6572                         pr_err("Unknown _BCL data, please report this to %s\n",
6573                                 TPACPI_MAIL);
6574                         rc = 0;
6575                 } else {
6576                         rc = obj->package.count;
6577                 }
6578                 break;
6579         }
6580
6581         kfree(buffer.pointer);
6582         return rc;
6583 }
6584
6585
6586 /*
6587  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6588  */
6589 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6590 {
6591         acpi_handle video_device;
6592         int bcl_levels = 0;
6593
6594         tpacpi_acpi_handle_locate("video", NULL, &video_device);
6595         if (video_device)
6596                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6597
6598         tp_features.bright_acpimode = (bcl_levels > 0);
6599
6600         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6601 }
6602
6603 /*
6604  * These are only useful for models that have only one possibility
6605  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6606  * these quirks.
6607  */
6608 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6609 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6610 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6611
6612 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6613         /* Models with ATI GPUs known to require ECNVRAM mode */
6614         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6615
6616         /* Models with ATI GPUs that can use ECNVRAM */
6617         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6618         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6619         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6620         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6621
6622         /* Models with Intel Extreme Graphics 2 */
6623         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6624         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6625         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6626
6627         /* Models with Intel GMA900 */
6628         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6629         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6630         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6631 };
6632
6633 /*
6634  * Returns < 0 for error, otherwise sets tp_features.bright_*
6635  * and bright_maxlvl.
6636  */
6637 static void __init tpacpi_detect_brightness_capabilities(void)
6638 {
6639         unsigned int b;
6640
6641         vdbg_printk(TPACPI_DBG_INIT,
6642                     "detecting firmware brightness interface capabilities\n");
6643
6644         /* we could run a quirks check here (same table used by
6645          * brightness_init) if needed */
6646
6647         /*
6648          * We always attempt to detect acpi support, so as to switch
6649          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6650          * going to publish a backlight interface
6651          */
6652         b = tpacpi_check_std_acpi_brightness_support();
6653         switch (b) {
6654         case 16:
6655                 bright_maxlvl = 15;
6656                 break;
6657         case 8:
6658         case 0:
6659                 bright_maxlvl = 7;
6660                 break;
6661         default:
6662                 tp_features.bright_unkfw = 1;
6663                 bright_maxlvl = b - 1;
6664         }
6665         pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6666 }
6667
6668 static int __init brightness_init(struct ibm_init_struct *iibm)
6669 {
6670         struct backlight_properties props;
6671         int b;
6672         unsigned long quirks;
6673
6674         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6675
6676         mutex_init(&brightness_mutex);
6677
6678         quirks = tpacpi_check_quirks(brightness_quirk_table,
6679                                 ARRAY_SIZE(brightness_quirk_table));
6680
6681         /* tpacpi_detect_brightness_capabilities() must have run already */
6682
6683         /* if it is unknown, we don't handle it: it wouldn't be safe */
6684         if (tp_features.bright_unkfw)
6685                 return 1;
6686
6687         if (!brightness_enable) {
6688                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6689                            "brightness support disabled by "
6690                            "module parameter\n");
6691                 return 1;
6692         }
6693
6694         if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6695                 if (brightness_enable > 1) {
6696                         pr_info("Standard ACPI backlight interface "
6697                                 "available, not loading native one\n");
6698                         return 1;
6699                 } else if (brightness_enable == 1) {
6700                         pr_warn("Cannot enable backlight brightness support, "
6701                                 "ACPI is already handling it.  Refer to the "
6702                                 "acpi_backlight kernel parameter.\n");
6703                         return 1;
6704                 }
6705         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6706                 pr_notice("Standard ACPI backlight interface not "
6707                           "available, thinkpad_acpi native "
6708                           "brightness control enabled\n");
6709         }
6710
6711         /*
6712          * Check for module parameter bogosity, note that we
6713          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6714          * able to detect "unspecified"
6715          */
6716         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6717                 return -EINVAL;
6718
6719         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6720         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6721             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6722                 if (quirks & TPACPI_BRGHT_Q_EC)
6723                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6724                 else
6725                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6726
6727                 dbg_printk(TPACPI_DBG_BRGHT,
6728                            "driver auto-selected brightness_mode=%d\n",
6729                            brightness_mode);
6730         }
6731
6732         /* Safety */
6733         if (!tpacpi_is_ibm() &&
6734             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6735              brightness_mode == TPACPI_BRGHT_MODE_EC))
6736                 return -EINVAL;
6737
6738         if (tpacpi_brightness_get_raw(&b) < 0)
6739                 return 1;
6740
6741         memset(&props, 0, sizeof(struct backlight_properties));
6742         props.type = BACKLIGHT_PLATFORM;
6743         props.max_brightness = bright_maxlvl;
6744         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6745         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6746                                                          NULL, NULL,
6747                                                          &ibm_backlight_data,
6748                                                          &props);
6749         if (IS_ERR(ibm_backlight_device)) {
6750                 int rc = PTR_ERR(ibm_backlight_device);
6751                 ibm_backlight_device = NULL;
6752                 pr_err("Could not register backlight device\n");
6753                 return rc;
6754         }
6755         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6756                         "brightness is supported\n");
6757
6758         if (quirks & TPACPI_BRGHT_Q_ASK) {
6759                 pr_notice("brightness: will use unverified default: "
6760                           "brightness_mode=%d\n", brightness_mode);
6761                 pr_notice("brightness: please report to %s whether it works well "
6762                           "or not on your ThinkPad\n", TPACPI_MAIL);
6763         }
6764
6765         /* Added by mistake in early 2007.  Probably useless, but it could
6766          * be working around some unknown firmware problem where the value
6767          * read at startup doesn't match the real hardware state... so leave
6768          * it in place just in case */
6769         backlight_update_status(ibm_backlight_device);
6770
6771         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6772                         "brightness: registering brightness hotkeys "
6773                         "as change notification\n");
6774         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6775                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6776                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6777         return 0;
6778 }
6779
6780 static void brightness_suspend(void)
6781 {
6782         tpacpi_brightness_checkpoint_nvram();
6783 }
6784
6785 static void brightness_shutdown(void)
6786 {
6787         tpacpi_brightness_checkpoint_nvram();
6788 }
6789
6790 static void brightness_exit(void)
6791 {
6792         if (ibm_backlight_device) {
6793                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6794                             "calling backlight_device_unregister()\n");
6795                 backlight_device_unregister(ibm_backlight_device);
6796         }
6797
6798         tpacpi_brightness_checkpoint_nvram();
6799 }
6800
6801 static int brightness_read(struct seq_file *m)
6802 {
6803         int level;
6804
6805         level = brightness_get(NULL);
6806         if (level < 0) {
6807                 seq_printf(m, "level:\t\tunreadable\n");
6808         } else {
6809                 seq_printf(m, "level:\t\t%d\n", level);
6810                 seq_printf(m, "commands:\tup, down\n");
6811                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6812                                bright_maxlvl);
6813         }
6814
6815         return 0;
6816 }
6817
6818 static int brightness_write(char *buf)
6819 {
6820         int level;
6821         int rc;
6822         char *cmd;
6823
6824         level = brightness_get(NULL);
6825         if (level < 0)
6826                 return level;
6827
6828         while ((cmd = next_cmd(&buf))) {
6829                 if (strlencmp(cmd, "up") == 0) {
6830                         if (level < bright_maxlvl)
6831                                 level++;
6832                 } else if (strlencmp(cmd, "down") == 0) {
6833                         if (level > 0)
6834                                 level--;
6835                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6836                            level >= 0 && level <= bright_maxlvl) {
6837                         /* new level set */
6838                 } else
6839                         return -EINVAL;
6840         }
6841
6842         tpacpi_disclose_usertask("procfs brightness",
6843                         "set level to %d\n", level);
6844
6845         /*
6846          * Now we know what the final level should be, so we try to set it.
6847          * Doing it this way makes the syscall restartable in case of EINTR
6848          */
6849         rc = brightness_set(level);
6850         if (!rc && ibm_backlight_device)
6851                 backlight_force_update(ibm_backlight_device,
6852                                         BACKLIGHT_UPDATE_SYSFS);
6853         return (rc == -EINTR) ? -ERESTARTSYS : rc;
6854 }
6855
6856 static struct ibm_struct brightness_driver_data = {
6857         .name = "brightness",
6858         .read = brightness_read,
6859         .write = brightness_write,
6860         .exit = brightness_exit,
6861         .suspend = brightness_suspend,
6862         .shutdown = brightness_shutdown,
6863 };
6864
6865 /*************************************************************************
6866  * Volume subdriver
6867  */
6868
6869 /*
6870  * IBM ThinkPads have a simple volume controller with MUTE gating.
6871  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6872  *
6873  * Since the *61 series (and probably also the later *60 series), Lenovo
6874  * ThinkPads only implement the MUTE gate.
6875  *
6876  * EC register 0x30
6877  *   Bit 6: MUTE (1 mutes sound)
6878  *   Bit 3-0: Volume
6879  *   Other bits should be zero as far as we know.
6880  *
6881  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6882  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6883  * such as bit 7 which is used to detect repeated presses of MUTE,
6884  * and we leave them unchanged.
6885  *
6886  * On newer Lenovo ThinkPads, the EC can automatically change the volume
6887  * in response to user input.  Unfortunately, this rarely works well.
6888  * The laptop changes the state of its internal MUTE gate and, on some
6889  * models, sends KEY_MUTE, causing any user code that responds to the
6890  * mute button to get confused.  The hardware MUTE gate is also
6891  * unnecessary, since user code can handle the mute button without
6892  * kernel or EC help.
6893  *
6894  * To avoid confusing userspace, we simply disable all EC-based mute
6895  * and volume controls when possible.
6896  */
6897
6898 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6899
6900 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
6901 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6902 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6903
6904 #if SNDRV_CARDS <= 32
6905 #define DEFAULT_ALSA_IDX                ~((1 << (SNDRV_CARDS - 3)) - 1)
6906 #else
6907 #define DEFAULT_ALSA_IDX                ~((1 << (32 - 3)) - 1)
6908 #endif
6909 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
6910 static char *alsa_id = "ThinkPadEC";
6911 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6912
6913 struct tpacpi_alsa_data {
6914         struct snd_card *card;
6915         struct snd_ctl_elem_id *ctl_mute_id;
6916         struct snd_ctl_elem_id *ctl_vol_id;
6917 };
6918
6919 static struct snd_card *alsa_card;
6920
6921 enum {
6922         TP_EC_AUDIO = 0x30,
6923
6924         /* TP_EC_AUDIO bits */
6925         TP_EC_AUDIO_MUTESW = 6,
6926
6927         /* TP_EC_AUDIO bitmasks */
6928         TP_EC_AUDIO_LVL_MSK = 0x0F,
6929         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6930
6931         /* Maximum volume */
6932         TP_EC_VOLUME_MAX = 14,
6933 };
6934
6935 enum tpacpi_volume_access_mode {
6936         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6937         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6938         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6939         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6940         TPACPI_VOL_MODE_MAX
6941 };
6942
6943 enum tpacpi_volume_capabilities {
6944         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6945         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6946         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6947         TPACPI_VOL_CAP_MAX
6948 };
6949
6950 enum tpacpi_mute_btn_mode {
6951         TP_EC_MUTE_BTN_LATCH  = 0,      /* Mute mutes; up/down unmutes */
6952         /* We don't know what mode 1 is. */
6953         TP_EC_MUTE_BTN_NONE   = 2,      /* Mute and up/down are just keys */
6954         TP_EC_MUTE_BTN_TOGGLE = 3,      /* Mute toggles; up/down unmutes */
6955 };
6956
6957 static enum tpacpi_volume_access_mode volume_mode =
6958         TPACPI_VOL_MODE_MAX;
6959
6960 static enum tpacpi_volume_capabilities volume_capabilities;
6961 static bool volume_control_allowed;
6962 static bool software_mute_requested = true;
6963 static bool software_mute_active;
6964 static int software_mute_orig_mode;
6965
6966 /*
6967  * Used to syncronize writers to TP_EC_AUDIO and
6968  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6969  */
6970 static struct mutex volume_mutex;
6971
6972 static void tpacpi_volume_checkpoint_nvram(void)
6973 {
6974         u8 lec = 0;
6975         u8 b_nvram;
6976         u8 ec_mask;
6977
6978         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6979                 return;
6980         if (!volume_control_allowed)
6981                 return;
6982         if (software_mute_active)
6983                 return;
6984
6985         vdbg_printk(TPACPI_DBG_MIXER,
6986                 "trying to checkpoint mixer state to NVRAM...\n");
6987
6988         if (tp_features.mixer_no_level_control)
6989                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6990         else
6991                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6992
6993         if (mutex_lock_killable(&volume_mutex) < 0)
6994                 return;
6995
6996         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6997                 goto unlock;
6998         lec &= ec_mask;
6999         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7000
7001         if (lec != (b_nvram & ec_mask)) {
7002                 /* NVRAM needs update */
7003                 b_nvram &= ~ec_mask;
7004                 b_nvram |= lec;
7005                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7006                 dbg_printk(TPACPI_DBG_MIXER,
7007                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7008                            (unsigned int) lec, (unsigned int) b_nvram);
7009         } else {
7010                 vdbg_printk(TPACPI_DBG_MIXER,
7011                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7012                            (unsigned int) lec, (unsigned int) b_nvram);
7013         }
7014
7015 unlock:
7016         mutex_unlock(&volume_mutex);
7017 }
7018
7019 static int volume_get_status_ec(u8 *status)
7020 {
7021         u8 s;
7022
7023         if (!acpi_ec_read(TP_EC_AUDIO, &s))
7024                 return -EIO;
7025
7026         *status = s;
7027
7028         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7029
7030         return 0;
7031 }
7032
7033 static int volume_get_status(u8 *status)
7034 {
7035         return volume_get_status_ec(status);
7036 }
7037
7038 static int volume_set_status_ec(const u8 status)
7039 {
7040         if (!acpi_ec_write(TP_EC_AUDIO, status))
7041                 return -EIO;
7042
7043         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7044
7045         /*
7046          * On X200s, and possibly on others, it can take a while for
7047          * reads to become correct.
7048          */
7049         msleep(1);
7050
7051         return 0;
7052 }
7053
7054 static int volume_set_status(const u8 status)
7055 {
7056         return volume_set_status_ec(status);
7057 }
7058
7059 /* returns < 0 on error, 0 on no change, 1 on change */
7060 static int __volume_set_mute_ec(const bool mute)
7061 {
7062         int rc;
7063         u8 s, n;
7064
7065         if (mutex_lock_killable(&volume_mutex) < 0)
7066                 return -EINTR;
7067
7068         rc = volume_get_status_ec(&s);
7069         if (rc)
7070                 goto unlock;
7071
7072         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7073                      s & ~TP_EC_AUDIO_MUTESW_MSK;
7074
7075         if (n != s) {
7076                 rc = volume_set_status_ec(n);
7077                 if (!rc)
7078                         rc = 1;
7079         }
7080
7081 unlock:
7082         mutex_unlock(&volume_mutex);
7083         return rc;
7084 }
7085
7086 static int volume_alsa_set_mute(const bool mute)
7087 {
7088         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7089                    (mute) ? "" : "un");
7090         return __volume_set_mute_ec(mute);
7091 }
7092
7093 static int volume_set_mute(const bool mute)
7094 {
7095         int rc;
7096
7097         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7098                    (mute) ? "" : "un");
7099
7100         rc = __volume_set_mute_ec(mute);
7101         return (rc < 0) ? rc : 0;
7102 }
7103
7104 /* returns < 0 on error, 0 on no change, 1 on change */
7105 static int __volume_set_volume_ec(const u8 vol)
7106 {
7107         int rc;
7108         u8 s, n;
7109
7110         if (vol > TP_EC_VOLUME_MAX)
7111                 return -EINVAL;
7112
7113         if (mutex_lock_killable(&volume_mutex) < 0)
7114                 return -EINTR;
7115
7116         rc = volume_get_status_ec(&s);
7117         if (rc)
7118                 goto unlock;
7119
7120         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7121
7122         if (n != s) {
7123                 rc = volume_set_status_ec(n);
7124                 if (!rc)
7125                         rc = 1;
7126         }
7127
7128 unlock:
7129         mutex_unlock(&volume_mutex);
7130         return rc;
7131 }
7132
7133 static int volume_set_software_mute(bool startup)
7134 {
7135         int result;
7136
7137         if (!tpacpi_is_lenovo())
7138                 return -ENODEV;
7139
7140         if (startup) {
7141                 if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7142                                 "HAUM", "qd"))
7143                         return -EIO;
7144
7145                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7146                             "Initial HAUM setting was %d\n",
7147                             software_mute_orig_mode);
7148         }
7149
7150         if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7151                         (int)TP_EC_MUTE_BTN_NONE))
7152                 return -EIO;
7153
7154         if (result != TP_EC_MUTE_BTN_NONE)
7155                 pr_warn("Unexpected SAUM result %d\n",
7156                         result);
7157
7158         /*
7159          * In software mute mode, the standard codec controls take
7160          * precendence, so we unmute the ThinkPad HW switch at
7161          * startup.  Just on case there are SAUM-capable ThinkPads
7162          * with level controls, set max HW volume as well.
7163          */
7164         if (tp_features.mixer_no_level_control)
7165                 result = volume_set_mute(false);
7166         else
7167                 result = volume_set_status(TP_EC_VOLUME_MAX);
7168
7169         if (result != 0)
7170                 pr_warn("Failed to unmute the HW mute switch\n");
7171
7172         return 0;
7173 }
7174
7175 static void volume_exit_software_mute(void)
7176 {
7177         int r;
7178
7179         if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7180             || r != software_mute_orig_mode)
7181                 pr_warn("Failed to restore mute mode\n");
7182 }
7183
7184 static int volume_alsa_set_volume(const u8 vol)
7185 {
7186         dbg_printk(TPACPI_DBG_MIXER,
7187                    "ALSA: trying to set volume level to %hu\n", vol);
7188         return __volume_set_volume_ec(vol);
7189 }
7190
7191 static void volume_alsa_notify_change(void)
7192 {
7193         struct tpacpi_alsa_data *d;
7194
7195         if (alsa_card && alsa_card->private_data) {
7196                 d = alsa_card->private_data;
7197                 if (d->ctl_mute_id)
7198                         snd_ctl_notify(alsa_card,
7199                                         SNDRV_CTL_EVENT_MASK_VALUE,
7200                                         d->ctl_mute_id);
7201                 if (d->ctl_vol_id)
7202                         snd_ctl_notify(alsa_card,
7203                                         SNDRV_CTL_EVENT_MASK_VALUE,
7204                                         d->ctl_vol_id);
7205         }
7206 }
7207
7208 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7209                                 struct snd_ctl_elem_info *uinfo)
7210 {
7211         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7212         uinfo->count = 1;
7213         uinfo->value.integer.min = 0;
7214         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7215         return 0;
7216 }
7217
7218 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7219                                 struct snd_ctl_elem_value *ucontrol)
7220 {
7221         u8 s;
7222         int rc;
7223
7224         rc = volume_get_status(&s);
7225         if (rc < 0)
7226                 return rc;
7227
7228         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7229         return 0;
7230 }
7231
7232 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7233                                 struct snd_ctl_elem_value *ucontrol)
7234 {
7235         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7236                                  ucontrol->value.integer.value[0]);
7237         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7238 }
7239
7240 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7241
7242 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7243                                 struct snd_ctl_elem_value *ucontrol)
7244 {
7245         u8 s;
7246         int rc;
7247
7248         rc = volume_get_status(&s);
7249         if (rc < 0)
7250                 return rc;
7251
7252         ucontrol->value.integer.value[0] =
7253                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7254         return 0;
7255 }
7256
7257 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7258                                 struct snd_ctl_elem_value *ucontrol)
7259 {
7260         tpacpi_disclose_usertask("ALSA", "%smute\n",
7261                                  ucontrol->value.integer.value[0] ?
7262                                         "un" : "");
7263         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7264 }
7265
7266 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7267         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7268         .name = "Console Playback Volume",
7269         .index = 0,
7270         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7271         .info = volume_alsa_vol_info,
7272         .get = volume_alsa_vol_get,
7273 };
7274
7275 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7276         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7277         .name = "Console Playback Switch",
7278         .index = 0,
7279         .access = SNDRV_CTL_ELEM_ACCESS_READ,
7280         .info = volume_alsa_mute_info,
7281         .get = volume_alsa_mute_get,
7282 };
7283
7284 static void volume_suspend(void)
7285 {
7286         tpacpi_volume_checkpoint_nvram();
7287 }
7288
7289 static void volume_resume(void)
7290 {
7291         if (software_mute_active) {
7292                 if (volume_set_software_mute(false) < 0)
7293                         pr_warn("Failed to restore software mute\n");
7294         } else {
7295                 volume_alsa_notify_change();
7296         }
7297 }
7298
7299 static void volume_shutdown(void)
7300 {
7301         tpacpi_volume_checkpoint_nvram();
7302 }
7303
7304 static void volume_exit(void)
7305 {
7306         if (alsa_card) {
7307                 snd_card_free(alsa_card);
7308                 alsa_card = NULL;
7309         }
7310
7311         tpacpi_volume_checkpoint_nvram();
7312
7313         if (software_mute_active)
7314                 volume_exit_software_mute();
7315 }
7316
7317 static int __init volume_create_alsa_mixer(void)
7318 {
7319         struct snd_card *card;
7320         struct tpacpi_alsa_data *data;
7321         struct snd_kcontrol *ctl_vol;
7322         struct snd_kcontrol *ctl_mute;
7323         int rc;
7324
7325         rc = snd_card_new(&tpacpi_pdev->dev,
7326                           alsa_index, alsa_id, THIS_MODULE,
7327                           sizeof(struct tpacpi_alsa_data), &card);
7328         if (rc < 0 || !card) {
7329                 pr_err("Failed to create ALSA card structures: %d\n", rc);
7330                 return 1;
7331         }
7332
7333         BUG_ON(!card->private_data);
7334         data = card->private_data;
7335         data->card = card;
7336
7337         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
7338                 sizeof(card->driver));
7339         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7340                 sizeof(card->shortname));
7341         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7342                  (thinkpad_id.ec_version_str) ?
7343                         thinkpad_id.ec_version_str : "(unknown)");
7344         snprintf(card->longname, sizeof(card->longname),
7345                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7346                  (thinkpad_id.ec_version_str) ?
7347                         thinkpad_id.ec_version_str : "unknown");
7348
7349         if (volume_control_allowed) {
7350                 volume_alsa_control_vol.put = volume_alsa_vol_put;
7351                 volume_alsa_control_vol.access =
7352                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7353
7354                 volume_alsa_control_mute.put = volume_alsa_mute_put;
7355                 volume_alsa_control_mute.access =
7356                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
7357         }
7358
7359         if (!tp_features.mixer_no_level_control) {
7360                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7361                 rc = snd_ctl_add(card, ctl_vol);
7362                 if (rc < 0) {
7363                         pr_err("Failed to create ALSA volume control: %d\n",
7364                                rc);
7365                         goto err_exit;
7366                 }
7367                 data->ctl_vol_id = &ctl_vol->id;
7368         }
7369
7370         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7371         rc = snd_ctl_add(card, ctl_mute);
7372         if (rc < 0) {
7373                 pr_err("Failed to create ALSA mute control: %d\n", rc);
7374                 goto err_exit;
7375         }
7376         data->ctl_mute_id = &ctl_mute->id;
7377
7378         rc = snd_card_register(card);
7379         if (rc < 0) {
7380                 pr_err("Failed to register ALSA card: %d\n", rc);
7381                 goto err_exit;
7382         }
7383
7384         alsa_card = card;
7385         return 0;
7386
7387 err_exit:
7388         snd_card_free(card);
7389         return 1;
7390 }
7391
7392 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
7393 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
7394
7395 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7396         /* Whitelist volume level on all IBM by default */
7397         { .vendor = PCI_VENDOR_ID_IBM,
7398           .bios   = TPACPI_MATCH_ANY,
7399           .ec     = TPACPI_MATCH_ANY,
7400           .quirks = TPACPI_VOL_Q_LEVEL },
7401
7402         /* Lenovo models with volume control (needs confirmation) */
7403         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7404         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7405         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7406         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7407         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7408         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7409         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7410
7411         /* Whitelist mute-only on all Lenovo by default */
7412         { .vendor = PCI_VENDOR_ID_LENOVO,
7413           .bios   = TPACPI_MATCH_ANY,
7414           .ec     = TPACPI_MATCH_ANY,
7415           .quirks = TPACPI_VOL_Q_MUTEONLY }
7416 };
7417
7418 static int __init volume_init(struct ibm_init_struct *iibm)
7419 {
7420         unsigned long quirks;
7421         int rc;
7422
7423         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7424
7425         mutex_init(&volume_mutex);
7426
7427         /*
7428          * Check for module parameter bogosity, note that we
7429          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7430          * able to detect "unspecified"
7431          */
7432         if (volume_mode > TPACPI_VOL_MODE_MAX)
7433                 return -EINVAL;
7434
7435         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7436                 pr_err("UCMS step volume mode not implemented, "
7437                        "please contact %s\n", TPACPI_MAIL);
7438                 return 1;
7439         }
7440
7441         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7442                 return -EINVAL;
7443
7444         /*
7445          * The ALSA mixer is our primary interface.
7446          * When disabled, don't install the subdriver at all
7447          */
7448         if (!alsa_enable) {
7449                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7450                             "ALSA mixer disabled by parameter, "
7451                             "not loading volume subdriver...\n");
7452                 return 1;
7453         }
7454
7455         quirks = tpacpi_check_quirks(volume_quirk_table,
7456                                      ARRAY_SIZE(volume_quirk_table));
7457
7458         switch (volume_capabilities) {
7459         case TPACPI_VOL_CAP_AUTO:
7460                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
7461                         tp_features.mixer_no_level_control = 1;
7462                 else if (quirks & TPACPI_VOL_Q_LEVEL)
7463                         tp_features.mixer_no_level_control = 0;
7464                 else
7465                         return 1; /* no mixer */
7466                 break;
7467         case TPACPI_VOL_CAP_VOLMUTE:
7468                 tp_features.mixer_no_level_control = 0;
7469                 break;
7470         case TPACPI_VOL_CAP_MUTEONLY:
7471                 tp_features.mixer_no_level_control = 1;
7472                 break;
7473         default:
7474                 return 1;
7475         }
7476
7477         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7478                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7479                                 "using user-supplied volume_capabilities=%d\n",
7480                                 volume_capabilities);
7481
7482         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7483             volume_mode == TPACPI_VOL_MODE_MAX) {
7484                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7485
7486                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7487                                 "driver auto-selected volume_mode=%d\n",
7488                                 volume_mode);
7489         } else {
7490                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7491                                 "using user-supplied volume_mode=%d\n",
7492                                 volume_mode);
7493         }
7494
7495         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7496                         "mute is supported, volume control is %s\n",
7497                         str_supported(!tp_features.mixer_no_level_control));
7498
7499         if (software_mute_requested && volume_set_software_mute(true) == 0) {
7500                 software_mute_active = true;
7501         } else {
7502                 rc = volume_create_alsa_mixer();
7503                 if (rc) {
7504                         pr_err("Could not create the ALSA mixer interface\n");
7505                         return rc;
7506                 }
7507
7508                 pr_info("Console audio control enabled, mode: %s\n",
7509                         (volume_control_allowed) ?
7510                                 "override (read/write)" :
7511                                 "monitor (read only)");
7512         }
7513
7514         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7515                 "registering volume hotkeys as change notification\n");
7516         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7517                         | TP_ACPI_HKEY_VOLUP_MASK
7518                         | TP_ACPI_HKEY_VOLDWN_MASK
7519                         | TP_ACPI_HKEY_MUTE_MASK);
7520
7521         return 0;
7522 }
7523
7524 static int volume_read(struct seq_file *m)
7525 {
7526         u8 status;
7527
7528         if (volume_get_status(&status) < 0) {
7529                 seq_printf(m, "level:\t\tunreadable\n");
7530         } else {
7531                 if (tp_features.mixer_no_level_control)
7532                         seq_printf(m, "level:\t\tunsupported\n");
7533                 else
7534                         seq_printf(m, "level:\t\t%d\n",
7535                                         status & TP_EC_AUDIO_LVL_MSK);
7536
7537                 seq_printf(m, "mute:\t\t%s\n",
7538                                 onoff(status, TP_EC_AUDIO_MUTESW));
7539
7540                 if (volume_control_allowed) {
7541                         seq_printf(m, "commands:\tunmute, mute\n");
7542                         if (!tp_features.mixer_no_level_control) {
7543                                 seq_printf(m,
7544                                                "commands:\tup, down\n");
7545                                 seq_printf(m,
7546                                                "commands:\tlevel <level>"
7547                                                " (<level> is 0-%d)\n",
7548                                                TP_EC_VOLUME_MAX);
7549                         }
7550                 }
7551         }
7552
7553         return 0;
7554 }
7555
7556 static int volume_write(char *buf)
7557 {
7558         u8 s;
7559         u8 new_level, new_mute;
7560         int l;
7561         char *cmd;
7562         int rc;
7563
7564         /*
7565          * We do allow volume control at driver startup, so that the
7566          * user can set initial state through the volume=... parameter hack.
7567          */
7568         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7569                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7570                         tp_warned.volume_ctrl_forbidden = 1;
7571                         pr_notice("Console audio control in monitor mode, "
7572                                   "changes are not allowed\n");
7573                         pr_notice("Use the volume_control=1 module parameter "
7574                                   "to enable volume control\n");
7575                 }
7576                 return -EPERM;
7577         }
7578
7579         rc = volume_get_status(&s);
7580         if (rc < 0)
7581                 return rc;
7582
7583         new_level = s & TP_EC_AUDIO_LVL_MSK;
7584         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7585
7586         while ((cmd = next_cmd(&buf))) {
7587                 if (!tp_features.mixer_no_level_control) {
7588                         if (strlencmp(cmd, "up") == 0) {
7589                                 if (new_mute)
7590                                         new_mute = 0;
7591                                 else if (new_level < TP_EC_VOLUME_MAX)
7592                                         new_level++;
7593                                 continue;
7594                         } else if (strlencmp(cmd, "down") == 0) {
7595                                 if (new_mute)
7596                                         new_mute = 0;
7597                                 else if (new_level > 0)
7598                                         new_level--;
7599                                 continue;
7600                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7601                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7602                                         new_level = l;
7603                                 continue;
7604                         }
7605                 }
7606                 if (strlencmp(cmd, "mute") == 0)
7607                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7608                 else if (strlencmp(cmd, "unmute") == 0)
7609                         new_mute = 0;
7610                 else
7611                         return -EINVAL;
7612         }
7613
7614         if (tp_features.mixer_no_level_control) {
7615                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7616                                         new_mute ? "" : "un");
7617                 rc = volume_set_mute(!!new_mute);
7618         } else {
7619                 tpacpi_disclose_usertask("procfs volume",
7620                                         "%smute and set level to %d\n",
7621                                         new_mute ? "" : "un", new_level);
7622                 rc = volume_set_status(new_mute | new_level);
7623         }
7624         volume_alsa_notify_change();
7625
7626         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7627 }
7628
7629 static struct ibm_struct volume_driver_data = {
7630         .name = "volume",
7631         .read = volume_read,
7632         .write = volume_write,
7633         .exit = volume_exit,
7634         .suspend = volume_suspend,
7635         .resume = volume_resume,
7636         .shutdown = volume_shutdown,
7637 };
7638
7639 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7640
7641 #define alsa_card NULL
7642
7643 static void inline volume_alsa_notify_change(void)
7644 {
7645 }
7646
7647 static int __init volume_init(struct ibm_init_struct *iibm)
7648 {
7649         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7650
7651         return 1;
7652 }
7653
7654 static struct ibm_struct volume_driver_data = {
7655         .name = "volume",
7656 };
7657
7658 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7659
7660 /*************************************************************************
7661  * Fan subdriver
7662  */
7663
7664 /*
7665  * FAN ACCESS MODES
7666  *
7667  * TPACPI_FAN_RD_ACPI_GFAN:
7668  *      ACPI GFAN method: returns fan level
7669  *
7670  *      see TPACPI_FAN_WR_ACPI_SFAN
7671  *      EC 0x2f (HFSP) not available if GFAN exists
7672  *
7673  * TPACPI_FAN_WR_ACPI_SFAN:
7674  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7675  *
7676  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7677  *      it for writing.
7678  *
7679  * TPACPI_FAN_WR_TPEC:
7680  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7681  *      Supported on almost all ThinkPads
7682  *
7683  *      Fan speed changes of any sort (including those caused by the
7684  *      disengaged mode) are usually done slowly by the firmware as the
7685  *      maximum amount of fan duty cycle change per second seems to be
7686  *      limited.
7687  *
7688  *      Reading is not available if GFAN exists.
7689  *      Writing is not available if SFAN exists.
7690  *
7691  *      Bits
7692  *       7      automatic mode engaged;
7693  *              (default operation mode of the ThinkPad)
7694  *              fan level is ignored in this mode.
7695  *       6      full speed mode (takes precedence over bit 7);
7696  *              not available on all thinkpads.  May disable
7697  *              the tachometer while the fan controller ramps up
7698  *              the speed (which can take up to a few *minutes*).
7699  *              Speeds up fan to 100% duty-cycle, which is far above
7700  *              the standard RPM levels.  It is not impossible that
7701  *              it could cause hardware damage.
7702  *      5-3     unused in some models.  Extra bits for fan level
7703  *              in others, but still useless as all values above
7704  *              7 map to the same speed as level 7 in these models.
7705  *      2-0     fan level (0..7 usually)
7706  *                      0x00 = stop
7707  *                      0x07 = max (set when temperatures critical)
7708  *              Some ThinkPads may have other levels, see
7709  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7710  *
7711  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7712  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7713  *      does so, its initial value is meaningless (0x07).
7714  *
7715  *      For firmware bugs, refer to:
7716  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7717  *
7718  *      ----
7719  *
7720  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7721  *      Main fan tachometer reading (in RPM)
7722  *
7723  *      This register is present on all ThinkPads with a new-style EC, and
7724  *      it is known not to be present on the A21m/e, and T22, as there is
7725  *      something else in offset 0x84 according to the ACPI DSDT.  Other
7726  *      ThinkPads from this same time period (and earlier) probably lack the
7727  *      tachometer as well.
7728  *
7729  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7730  *      was never fixed by IBM to report the EC firmware version string
7731  *      probably support the tachometer (like the early X models), so
7732  *      detecting it is quite hard.  We need more data to know for sure.
7733  *
7734  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7735  *      might result.
7736  *
7737  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
7738  *      mode.
7739  *
7740  *      For firmware bugs, refer to:
7741  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7742  *
7743  *      ----
7744  *
7745  *      ThinkPad EC register 0x31 bit 0 (only on select models)
7746  *
7747  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
7748  *      show the speed of the main fan.  When bit 0 of EC register 0x31
7749  *      is one, the tachometer registers show the speed of the auxiliary
7750  *      fan.
7751  *
7752  *      Fan control seems to affect both fans, regardless of the state
7753  *      of this bit.
7754  *
7755  *      So far, only the firmware for the X60/X61 non-tablet versions
7756  *      seem to support this (firmware TP-7M).
7757  *
7758  * TPACPI_FAN_WR_ACPI_FANS:
7759  *      ThinkPad X31, X40, X41.  Not available in the X60.
7760  *
7761  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
7762  *      high speed.  ACPI DSDT seems to map these three speeds to levels
7763  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7764  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7765  *
7766  *      The speeds are stored on handles
7767  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7768  *
7769  *      There are three default speed sets, accessible as handles:
7770  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7771  *
7772  *      ACPI DSDT switches which set is in use depending on various
7773  *      factors.
7774  *
7775  *      TPACPI_FAN_WR_TPEC is also available and should be used to
7776  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7777  *      but the ACPI tables just mention level 7.
7778  */
7779
7780 enum {                                  /* Fan control constants */
7781         fan_status_offset = 0x2f,       /* EC register 0x2f */
7782         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
7783                                          * 0x84 must be read before 0x85 */
7784         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
7785                                            bit 0 selects which fan is active */
7786
7787         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
7788         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
7789
7790         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
7791 };
7792
7793 enum fan_status_access_mode {
7794         TPACPI_FAN_NONE = 0,            /* No fan status or control */
7795         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
7796         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7797 };
7798
7799 enum fan_control_access_mode {
7800         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
7801         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
7802         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
7803         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
7804 };
7805
7806 enum fan_control_commands {
7807         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
7808         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
7809         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
7810                                                  * and also watchdog cmd */
7811 };
7812
7813 static bool fan_control_allowed;
7814
7815 static enum fan_status_access_mode fan_status_access_mode;
7816 static enum fan_control_access_mode fan_control_access_mode;
7817 static enum fan_control_commands fan_control_commands;
7818
7819 static u8 fan_control_initial_status;
7820 static u8 fan_control_desired_level;
7821 static u8 fan_control_resume_level;
7822 static int fan_watchdog_maxinterval;
7823
7824 static struct mutex fan_mutex;
7825
7826 static void fan_watchdog_fire(struct work_struct *ignored);
7827 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7828
7829 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
7830 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7831            "\\FSPD",            /* 600e/x, 770e, 770x */
7832            );                   /* all others */
7833 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7834            "JFNS",              /* 770x-JL */
7835            );                   /* all others */
7836
7837 /*
7838  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7839  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7840  * be in auto mode (0x80).
7841  *
7842  * This is corrected by any write to HFSP either by the driver, or
7843  * by the firmware.
7844  *
7845  * We assume 0x07 really means auto mode while this quirk is active,
7846  * as this is far more likely than the ThinkPad being in level 7,
7847  * which is only used by the firmware during thermal emergencies.
7848  *
7849  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7850  * TP-70 (T43, R52), which are known to be buggy.
7851  */
7852
7853 static void fan_quirk1_setup(void)
7854 {
7855         if (fan_control_initial_status == 0x07) {
7856                 pr_notice("fan_init: initial fan status is unknown, "
7857                           "assuming it is in auto mode\n");
7858                 tp_features.fan_ctrl_status_undef = 1;
7859         }
7860 }
7861
7862 static void fan_quirk1_handle(u8 *fan_status)
7863 {
7864         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7865                 if (*fan_status != fan_control_initial_status) {
7866                         /* something changed the HFSP regisnter since
7867                          * driver init time, so it is not undefined
7868                          * anymore */
7869                         tp_features.fan_ctrl_status_undef = 0;
7870                 } else {
7871                         /* Return most likely status. In fact, it
7872                          * might be the only possible status */
7873                         *fan_status = TP_EC_FAN_AUTO;
7874                 }
7875         }
7876 }
7877
7878 /* Select main fan on X60/X61, NOOP on others */
7879 static bool fan_select_fan1(void)
7880 {
7881         if (tp_features.second_fan) {
7882                 u8 val;
7883
7884                 if (ec_read(fan_select_offset, &val) < 0)
7885                         return false;
7886                 val &= 0xFEU;
7887                 if (ec_write(fan_select_offset, val) < 0)
7888                         return false;
7889         }
7890         return true;
7891 }
7892
7893 /* Select secondary fan on X60/X61 */
7894 static bool fan_select_fan2(void)
7895 {
7896         u8 val;
7897
7898         if (!tp_features.second_fan)
7899                 return false;
7900
7901         if (ec_read(fan_select_offset, &val) < 0)
7902                 return false;
7903         val |= 0x01U;
7904         if (ec_write(fan_select_offset, val) < 0)
7905                 return false;
7906
7907         return true;
7908 }
7909
7910 /*
7911  * Call with fan_mutex held
7912  */
7913 static void fan_update_desired_level(u8 status)
7914 {
7915         if ((status &
7916              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7917                 if (status > 7)
7918                         fan_control_desired_level = 7;
7919                 else
7920                         fan_control_desired_level = status;
7921         }
7922 }
7923
7924 static int fan_get_status(u8 *status)
7925 {
7926         u8 s;
7927
7928         /* TODO:
7929          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7930
7931         switch (fan_status_access_mode) {
7932         case TPACPI_FAN_RD_ACPI_GFAN: {
7933                 /* 570, 600e/x, 770e, 770x */
7934                 int res;
7935
7936                 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7937                         return -EIO;
7938
7939                 if (likely(status))
7940                         *status = res & 0x07;
7941
7942                 break;
7943         }
7944         case TPACPI_FAN_RD_TPEC:
7945                 /* all except 570, 600e/x, 770e, 770x */
7946                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7947                         return -EIO;
7948
7949                 if (likely(status)) {
7950                         *status = s;
7951                         fan_quirk1_handle(status);
7952                 }
7953
7954                 break;
7955
7956         default:
7957                 return -ENXIO;
7958         }
7959
7960         return 0;
7961 }
7962
7963 static int fan_get_status_safe(u8 *status)
7964 {
7965         int rc;
7966         u8 s;
7967
7968         if (mutex_lock_killable(&fan_mutex))
7969                 return -ERESTARTSYS;
7970         rc = fan_get_status(&s);
7971         if (!rc)
7972                 fan_update_desired_level(s);
7973         mutex_unlock(&fan_mutex);
7974
7975         if (rc)
7976                 return rc;
7977         if (status)
7978                 *status = s;
7979
7980         return 0;
7981 }
7982
7983 static int fan_get_speed(unsigned int *speed)
7984 {
7985         u8 hi, lo;
7986
7987         switch (fan_status_access_mode) {
7988         case TPACPI_FAN_RD_TPEC:
7989                 /* all except 570, 600e/x, 770e, 770x */
7990                 if (unlikely(!fan_select_fan1()))
7991                         return -EIO;
7992                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7993                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7994                         return -EIO;
7995
7996                 if (likely(speed))
7997                         *speed = (hi << 8) | lo;
7998
7999                 break;
8000
8001         default:
8002                 return -ENXIO;
8003         }
8004
8005         return 0;
8006 }
8007
8008 static int fan2_get_speed(unsigned int *speed)
8009 {
8010         u8 hi, lo;
8011         bool rc;
8012
8013         switch (fan_status_access_mode) {
8014         case TPACPI_FAN_RD_TPEC:
8015                 /* all except 570, 600e/x, 770e, 770x */
8016                 if (unlikely(!fan_select_fan2()))
8017                         return -EIO;
8018                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8019                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
8020                 fan_select_fan1(); /* play it safe */
8021                 if (rc)
8022                         return -EIO;
8023
8024                 if (likely(speed))
8025                         *speed = (hi << 8) | lo;
8026
8027                 break;
8028
8029         default:
8030                 return -ENXIO;
8031         }
8032
8033         return 0;
8034 }
8035
8036 static int fan_set_level(int level)
8037 {
8038         if (!fan_control_allowed)
8039                 return -EPERM;
8040
8041         switch (fan_control_access_mode) {
8042         case TPACPI_FAN_WR_ACPI_SFAN:
8043                 if (level >= 0 && level <= 7) {
8044                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8045                                 return -EIO;
8046                 } else
8047                         return -EINVAL;
8048                 break;
8049
8050         case TPACPI_FAN_WR_ACPI_FANS:
8051         case TPACPI_FAN_WR_TPEC:
8052                 if (!(level & TP_EC_FAN_AUTO) &&
8053                     !(level & TP_EC_FAN_FULLSPEED) &&
8054                     ((level < 0) || (level > 7)))
8055                         return -EINVAL;
8056
8057                 /* safety net should the EC not support AUTO
8058                  * or FULLSPEED mode bits and just ignore them */
8059                 if (level & TP_EC_FAN_FULLSPEED)
8060                         level |= 7;     /* safety min speed 7 */
8061                 else if (level & TP_EC_FAN_AUTO)
8062                         level |= 4;     /* safety min speed 4 */
8063
8064                 if (!acpi_ec_write(fan_status_offset, level))
8065                         return -EIO;
8066                 else
8067                         tp_features.fan_ctrl_status_undef = 0;
8068                 break;
8069
8070         default:
8071                 return -ENXIO;
8072         }
8073
8074         vdbg_printk(TPACPI_DBG_FAN,
8075                 "fan control: set fan control register to 0x%02x\n", level);
8076         return 0;
8077 }
8078
8079 static int fan_set_level_safe(int level)
8080 {
8081         int rc;
8082
8083         if (!fan_control_allowed)
8084                 return -EPERM;
8085
8086         if (mutex_lock_killable(&fan_mutex))
8087                 return -ERESTARTSYS;
8088
8089         if (level == TPACPI_FAN_LAST_LEVEL)
8090                 level = fan_control_desired_level;
8091
8092         rc = fan_set_level(level);
8093         if (!rc)
8094                 fan_update_desired_level(level);
8095
8096         mutex_unlock(&fan_mutex);
8097         return rc;
8098 }
8099
8100 static int fan_set_enable(void)
8101 {
8102         u8 s;
8103         int rc;
8104
8105         if (!fan_control_allowed)
8106                 return -EPERM;
8107
8108         if (mutex_lock_killable(&fan_mutex))
8109                 return -ERESTARTSYS;
8110
8111         switch (fan_control_access_mode) {
8112         case TPACPI_FAN_WR_ACPI_FANS:
8113         case TPACPI_FAN_WR_TPEC:
8114                 rc = fan_get_status(&s);
8115                 if (rc < 0)
8116                         break;
8117
8118                 /* Don't go out of emergency fan mode */
8119                 if (s != 7) {
8120                         s &= 0x07;
8121                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8122                 }
8123
8124                 if (!acpi_ec_write(fan_status_offset, s))
8125                         rc = -EIO;
8126                 else {
8127                         tp_features.fan_ctrl_status_undef = 0;
8128                         rc = 0;
8129                 }
8130                 break;
8131
8132         case TPACPI_FAN_WR_ACPI_SFAN:
8133                 rc = fan_get_status(&s);
8134                 if (rc < 0)
8135                         break;
8136
8137                 s &= 0x07;
8138
8139                 /* Set fan to at least level 4 */
8140                 s |= 4;
8141
8142                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8143                         rc = -EIO;
8144                 else
8145                         rc = 0;
8146                 break;
8147
8148         default:
8149                 rc = -ENXIO;
8150         }
8151
8152         mutex_unlock(&fan_mutex);
8153
8154         if (!rc)
8155                 vdbg_printk(TPACPI_DBG_FAN,
8156                         "fan control: set fan control register to 0x%02x\n",
8157                         s);
8158         return rc;
8159 }
8160
8161 static int fan_set_disable(void)
8162 {
8163         int rc;
8164
8165         if (!fan_control_allowed)
8166                 return -EPERM;
8167
8168         if (mutex_lock_killable(&fan_mutex))
8169                 return -ERESTARTSYS;
8170
8171         rc = 0;
8172         switch (fan_control_access_mode) {
8173         case TPACPI_FAN_WR_ACPI_FANS:
8174         case TPACPI_FAN_WR_TPEC:
8175                 if (!acpi_ec_write(fan_status_offset, 0x00))
8176                         rc = -EIO;
8177                 else {
8178                         fan_control_desired_level = 0;
8179                         tp_features.fan_ctrl_status_undef = 0;
8180                 }
8181                 break;
8182
8183         case TPACPI_FAN_WR_ACPI_SFAN:
8184                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8185                         rc = -EIO;
8186                 else
8187                         fan_control_desired_level = 0;
8188                 break;
8189
8190         default:
8191                 rc = -ENXIO;
8192         }
8193
8194         if (!rc)
8195                 vdbg_printk(TPACPI_DBG_FAN,
8196                         "fan control: set fan control register to 0\n");
8197
8198         mutex_unlock(&fan_mutex);
8199         return rc;
8200 }
8201
8202 static int fan_set_speed(int speed)
8203 {
8204         int rc;
8205
8206         if (!fan_control_allowed)
8207                 return -EPERM;
8208
8209         if (mutex_lock_killable(&fan_mutex))
8210                 return -ERESTARTSYS;
8211
8212         rc = 0;
8213         switch (fan_control_access_mode) {
8214         case TPACPI_FAN_WR_ACPI_FANS:
8215                 if (speed >= 0 && speed <= 65535) {
8216                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8217                                         speed, speed, speed))
8218                                 rc = -EIO;
8219                 } else
8220                         rc = -EINVAL;
8221                 break;
8222
8223         default:
8224                 rc = -ENXIO;
8225         }
8226
8227         mutex_unlock(&fan_mutex);
8228         return rc;
8229 }
8230
8231 static void fan_watchdog_reset(void)
8232 {
8233         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8234                 return;
8235
8236         if (fan_watchdog_maxinterval > 0 &&
8237             tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8238                 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8239                         msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8240         else
8241                 cancel_delayed_work(&fan_watchdog_task);
8242 }
8243
8244 static void fan_watchdog_fire(struct work_struct *ignored)
8245 {
8246         int rc;
8247
8248         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8249                 return;
8250
8251         pr_notice("fan watchdog: enabling fan\n");
8252         rc = fan_set_enable();
8253         if (rc < 0) {
8254                 pr_err("fan watchdog: error %d while enabling fan, "
8255                        "will try again later...\n", -rc);
8256                 /* reschedule for later */
8257                 fan_watchdog_reset();
8258         }
8259 }
8260
8261 /*
8262  * SYSFS fan layout: hwmon compatible (device)
8263  *
8264  * pwm*_enable:
8265  *      0: "disengaged" mode
8266  *      1: manual mode
8267  *      2: native EC "auto" mode (recommended, hardware default)
8268  *
8269  * pwm*: set speed in manual mode, ignored otherwise.
8270  *      0 is level 0; 255 is level 7. Intermediate points done with linear
8271  *      interpolation.
8272  *
8273  * fan*_input: tachometer reading, RPM
8274  *
8275  *
8276  * SYSFS fan layout: extensions
8277  *
8278  * fan_watchdog (driver):
8279  *      fan watchdog interval in seconds, 0 disables (default), max 120
8280  */
8281
8282 /* sysfs fan pwm1_enable ----------------------------------------------- */
8283 static ssize_t fan_pwm1_enable_show(struct device *dev,
8284                                     struct device_attribute *attr,
8285                                     char *buf)
8286 {
8287         int res, mode;
8288         u8 status;
8289
8290         res = fan_get_status_safe(&status);
8291         if (res)
8292                 return res;
8293
8294         if (status & TP_EC_FAN_FULLSPEED) {
8295                 mode = 0;
8296         } else if (status & TP_EC_FAN_AUTO) {
8297                 mode = 2;
8298         } else
8299                 mode = 1;
8300
8301         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
8302 }
8303
8304 static ssize_t fan_pwm1_enable_store(struct device *dev,
8305                                      struct device_attribute *attr,
8306                                      const char *buf, size_t count)
8307 {
8308         unsigned long t;
8309         int res, level;
8310
8311         if (parse_strtoul(buf, 2, &t))
8312                 return -EINVAL;
8313
8314         tpacpi_disclose_usertask("hwmon pwm1_enable",
8315                         "set fan mode to %lu\n", t);
8316
8317         switch (t) {
8318         case 0:
8319                 level = TP_EC_FAN_FULLSPEED;
8320                 break;
8321         case 1:
8322                 level = TPACPI_FAN_LAST_LEVEL;
8323                 break;
8324         case 2:
8325                 level = TP_EC_FAN_AUTO;
8326                 break;
8327         case 3:
8328                 /* reserved for software-controlled auto mode */
8329                 return -ENOSYS;
8330         default:
8331                 return -EINVAL;
8332         }
8333
8334         res = fan_set_level_safe(level);
8335         if (res == -ENXIO)
8336                 return -EINVAL;
8337         else if (res < 0)
8338                 return res;
8339
8340         fan_watchdog_reset();
8341
8342         return count;
8343 }
8344
8345 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8346                    fan_pwm1_enable_show, fan_pwm1_enable_store);
8347
8348 /* sysfs fan pwm1 ------------------------------------------------------ */
8349 static ssize_t fan_pwm1_show(struct device *dev,
8350                              struct device_attribute *attr,
8351                              char *buf)
8352 {
8353         int res;
8354         u8 status;
8355
8356         res = fan_get_status_safe(&status);
8357         if (res)
8358                 return res;
8359
8360         if ((status &
8361              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8362                 status = fan_control_desired_level;
8363
8364         if (status > 7)
8365                 status = 7;
8366
8367         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
8368 }
8369
8370 static ssize_t fan_pwm1_store(struct device *dev,
8371                               struct device_attribute *attr,
8372                               const char *buf, size_t count)
8373 {
8374         unsigned long s;
8375         int rc;
8376         u8 status, newlevel;
8377
8378         if (parse_strtoul(buf, 255, &s))
8379                 return -EINVAL;
8380
8381         tpacpi_disclose_usertask("hwmon pwm1",
8382                         "set fan speed to %lu\n", s);
8383
8384         /* scale down from 0-255 to 0-7 */
8385         newlevel = (s >> 5) & 0x07;
8386
8387         if (mutex_lock_killable(&fan_mutex))
8388                 return -ERESTARTSYS;
8389
8390         rc = fan_get_status(&status);
8391         if (!rc && (status &
8392                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8393                 rc = fan_set_level(newlevel);
8394                 if (rc == -ENXIO)
8395                         rc = -EINVAL;
8396                 else if (!rc) {
8397                         fan_update_desired_level(newlevel);
8398                         fan_watchdog_reset();
8399                 }
8400         }
8401
8402         mutex_unlock(&fan_mutex);
8403         return (rc) ? rc : count;
8404 }
8405
8406 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8407
8408 /* sysfs fan fan1_input ------------------------------------------------ */
8409 static ssize_t fan_fan1_input_show(struct device *dev,
8410                            struct device_attribute *attr,
8411                            char *buf)
8412 {
8413         int res;
8414         unsigned int speed;
8415
8416         res = fan_get_speed(&speed);
8417         if (res < 0)
8418                 return res;
8419
8420         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8421 }
8422
8423 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8424
8425 /* sysfs fan fan2_input ------------------------------------------------ */
8426 static ssize_t fan_fan2_input_show(struct device *dev,
8427                            struct device_attribute *attr,
8428                            char *buf)
8429 {
8430         int res;
8431         unsigned int speed;
8432
8433         res = fan2_get_speed(&speed);
8434         if (res < 0)
8435                 return res;
8436
8437         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
8438 }
8439
8440 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8441
8442 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8443 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
8444                                      char *buf)
8445 {
8446         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
8447 }
8448
8449 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
8450                                       const char *buf, size_t count)
8451 {
8452         unsigned long t;
8453
8454         if (parse_strtoul(buf, 120, &t))
8455                 return -EINVAL;
8456
8457         if (!fan_control_allowed)
8458                 return -EPERM;
8459
8460         fan_watchdog_maxinterval = t;
8461         fan_watchdog_reset();
8462
8463         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8464
8465         return count;
8466 }
8467
8468 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
8469                 fan_fan_watchdog_show, fan_fan_watchdog_store);
8470
8471 /* --------------------------------------------------------------------- */
8472 static struct attribute *fan_attributes[] = {
8473         &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr,
8474         &dev_attr_fan1_input.attr,
8475         NULL, /* for fan2_input */
8476         NULL
8477 };
8478
8479 static const struct attribute_group fan_attr_group = {
8480         .attrs = fan_attributes,
8481 };
8482
8483 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
8484 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
8485
8486 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
8487         { .vendor = PCI_VENDOR_ID_IBM,          \
8488           .bios = TPACPI_MATCH_ANY,             \
8489           .ec = TPID(__id1, __id2),             \
8490           .quirks = __quirks }
8491
8492 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
8493         { .vendor = PCI_VENDOR_ID_LENOVO,       \
8494           .bios = TPACPI_MATCH_ANY,             \
8495           .ec = TPID(__id1, __id2),             \
8496           .quirks = __quirks }
8497
8498 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8499         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
8500         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
8501         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
8502         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
8503         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
8504 };
8505
8506 #undef TPACPI_FAN_QL
8507 #undef TPACPI_FAN_QI
8508
8509 static int __init fan_init(struct ibm_init_struct *iibm)
8510 {
8511         int rc;
8512         unsigned long quirks;
8513
8514         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8515                         "initializing fan subdriver\n");
8516
8517         mutex_init(&fan_mutex);
8518         fan_status_access_mode = TPACPI_FAN_NONE;
8519         fan_control_access_mode = TPACPI_FAN_WR_NONE;
8520         fan_control_commands = 0;
8521         fan_watchdog_maxinterval = 0;
8522         tp_features.fan_ctrl_status_undef = 0;
8523         tp_features.second_fan = 0;
8524         fan_control_desired_level = 7;
8525
8526         if (tpacpi_is_ibm()) {
8527                 TPACPI_ACPIHANDLE_INIT(fans);
8528                 TPACPI_ACPIHANDLE_INIT(gfan);
8529                 TPACPI_ACPIHANDLE_INIT(sfan);
8530         }
8531
8532         quirks = tpacpi_check_quirks(fan_quirk_table,
8533                                      ARRAY_SIZE(fan_quirk_table));
8534
8535         if (gfan_handle) {
8536                 /* 570, 600e/x, 770e, 770x */
8537                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8538         } else {
8539                 /* all other ThinkPads: note that even old-style
8540                  * ThinkPad ECs supports the fan control register */
8541                 if (likely(acpi_ec_read(fan_status_offset,
8542                                         &fan_control_initial_status))) {
8543                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8544                         if (quirks & TPACPI_FAN_Q1)
8545                                 fan_quirk1_setup();
8546                         if (quirks & TPACPI_FAN_2FAN) {
8547                                 tp_features.second_fan = 1;
8548                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8549                                         "secondary fan support enabled\n");
8550                         }
8551                 } else {
8552                         pr_err("ThinkPad ACPI EC access misbehaving, "
8553                                "fan status and control unavailable\n");
8554                         return 1;
8555                 }
8556         }
8557
8558         if (sfan_handle) {
8559                 /* 570, 770x-JL */
8560                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8561                 fan_control_commands |=
8562                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8563         } else {
8564                 if (!gfan_handle) {
8565                         /* gfan without sfan means no fan control */
8566                         /* all other models implement TP EC 0x2f control */
8567
8568                         if (fans_handle) {
8569                                 /* X31, X40, X41 */
8570                                 fan_control_access_mode =
8571                                     TPACPI_FAN_WR_ACPI_FANS;
8572                                 fan_control_commands |=
8573                                     TPACPI_FAN_CMD_SPEED |
8574                                     TPACPI_FAN_CMD_LEVEL |
8575                                     TPACPI_FAN_CMD_ENABLE;
8576                         } else {
8577                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8578                                 fan_control_commands |=
8579                                     TPACPI_FAN_CMD_LEVEL |
8580                                     TPACPI_FAN_CMD_ENABLE;
8581                         }
8582                 }
8583         }
8584
8585         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8586                 "fan is %s, modes %d, %d\n",
8587                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8588                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8589                 fan_status_access_mode, fan_control_access_mode);
8590
8591         /* fan control master switch */
8592         if (!fan_control_allowed) {
8593                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8594                 fan_control_commands = 0;
8595                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8596                            "fan control features disabled by parameter\n");
8597         }
8598
8599         /* update fan_control_desired_level */
8600         if (fan_status_access_mode != TPACPI_FAN_NONE)
8601                 fan_get_status_safe(NULL);
8602
8603         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8604             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8605                 if (tp_features.second_fan) {
8606                         /* attach second fan tachometer */
8607                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8608                                         &dev_attr_fan2_input.attr;
8609                 }
8610                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8611                                          &fan_attr_group);
8612                 if (rc < 0)
8613                         return rc;
8614
8615                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8616                                         &driver_attr_fan_watchdog);
8617                 if (rc < 0) {
8618                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8619                                         &fan_attr_group);
8620                         return rc;
8621                 }
8622                 return 0;
8623         } else
8624                 return 1;
8625 }
8626
8627 static void fan_exit(void)
8628 {
8629         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8630                     "cancelling any pending fan watchdog tasks\n");
8631
8632         /* FIXME: can we really do this unconditionally? */
8633         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8634         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8635                            &driver_attr_fan_watchdog);
8636
8637         cancel_delayed_work(&fan_watchdog_task);
8638         flush_workqueue(tpacpi_wq);
8639 }
8640
8641 static void fan_suspend(void)
8642 {
8643         int rc;
8644
8645         if (!fan_control_allowed)
8646                 return;
8647
8648         /* Store fan status in cache */
8649         fan_control_resume_level = 0;
8650         rc = fan_get_status_safe(&fan_control_resume_level);
8651         if (rc < 0)
8652                 pr_notice("failed to read fan level for later "
8653                           "restore during resume: %d\n", rc);
8654
8655         /* if it is undefined, don't attempt to restore it.
8656          * KEEP THIS LAST */
8657         if (tp_features.fan_ctrl_status_undef)
8658                 fan_control_resume_level = 0;
8659 }
8660
8661 static void fan_resume(void)
8662 {
8663         u8 current_level = 7;
8664         bool do_set = false;
8665         int rc;
8666
8667         /* DSDT *always* updates status on resume */
8668         tp_features.fan_ctrl_status_undef = 0;
8669
8670         if (!fan_control_allowed ||
8671             !fan_control_resume_level ||
8672             (fan_get_status_safe(&current_level) < 0))
8673                 return;
8674
8675         switch (fan_control_access_mode) {
8676         case TPACPI_FAN_WR_ACPI_SFAN:
8677                 /* never decrease fan level */
8678                 do_set = (fan_control_resume_level > current_level);
8679                 break;
8680         case TPACPI_FAN_WR_ACPI_FANS:
8681         case TPACPI_FAN_WR_TPEC:
8682                 /* never decrease fan level, scale is:
8683                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8684                  *
8685                  * We expect the firmware to set either 7 or AUTO, but we
8686                  * handle FULLSPEED out of paranoia.
8687                  *
8688                  * So, we can safely only restore FULLSPEED or 7, anything
8689                  * else could slow the fan.  Restoring AUTO is useless, at
8690                  * best that's exactly what the DSDT already set (it is the
8691                  * slower it uses).
8692                  *
8693                  * Always keep in mind that the DSDT *will* have set the
8694                  * fans to what the vendor supposes is the best level.  We
8695                  * muck with it only to speed the fan up.
8696                  */
8697                 if (fan_control_resume_level != 7 &&
8698                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8699                         return;
8700                 else
8701                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8702                                  (current_level != fan_control_resume_level);
8703                 break;
8704         default:
8705                 return;
8706         }
8707         if (do_set) {
8708                 pr_notice("restoring fan level to 0x%02x\n",
8709                           fan_control_resume_level);
8710                 rc = fan_set_level_safe(fan_control_resume_level);
8711                 if (rc < 0)
8712                         pr_notice("failed to restore fan level: %d\n", rc);
8713         }
8714 }
8715
8716 static int fan_read(struct seq_file *m)
8717 {
8718         int rc;
8719         u8 status;
8720         unsigned int speed = 0;
8721
8722         switch (fan_status_access_mode) {
8723         case TPACPI_FAN_RD_ACPI_GFAN:
8724                 /* 570, 600e/x, 770e, 770x */
8725                 rc = fan_get_status_safe(&status);
8726                 if (rc < 0)
8727                         return rc;
8728
8729                 seq_printf(m, "status:\t\t%s\n"
8730                                "level:\t\t%d\n",
8731                                (status != 0) ? "enabled" : "disabled", status);
8732                 break;
8733
8734         case TPACPI_FAN_RD_TPEC:
8735                 /* all except 570, 600e/x, 770e, 770x */
8736                 rc = fan_get_status_safe(&status);
8737                 if (rc < 0)
8738                         return rc;
8739
8740                 seq_printf(m, "status:\t\t%s\n",
8741                                (status != 0) ? "enabled" : "disabled");
8742
8743                 rc = fan_get_speed(&speed);
8744                 if (rc < 0)
8745                         return rc;
8746
8747                 seq_printf(m, "speed:\t\t%d\n", speed);
8748
8749                 if (status & TP_EC_FAN_FULLSPEED)
8750                         /* Disengaged mode takes precedence */
8751                         seq_printf(m, "level:\t\tdisengaged\n");
8752                 else if (status & TP_EC_FAN_AUTO)
8753                         seq_printf(m, "level:\t\tauto\n");
8754                 else
8755                         seq_printf(m, "level:\t\t%d\n", status);
8756                 break;
8757
8758         case TPACPI_FAN_NONE:
8759         default:
8760                 seq_printf(m, "status:\t\tnot supported\n");
8761         }
8762
8763         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8764                 seq_printf(m, "commands:\tlevel <level>");
8765
8766                 switch (fan_control_access_mode) {
8767                 case TPACPI_FAN_WR_ACPI_SFAN:
8768                         seq_printf(m, " (<level> is 0-7)\n");
8769                         break;
8770
8771                 default:
8772                         seq_printf(m, " (<level> is 0-7, "
8773                                        "auto, disengaged, full-speed)\n");
8774                         break;
8775                 }
8776         }
8777
8778         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8779                 seq_printf(m, "commands:\tenable, disable\n"
8780                                "commands:\twatchdog <timeout> (<timeout> "
8781                                "is 0 (off), 1-120 (seconds))\n");
8782
8783         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8784                 seq_printf(m, "commands:\tspeed <speed>"
8785                                " (<speed> is 0-65535)\n");
8786
8787         return 0;
8788 }
8789
8790 static int fan_write_cmd_level(const char *cmd, int *rc)
8791 {
8792         int level;
8793
8794         if (strlencmp(cmd, "level auto") == 0)
8795                 level = TP_EC_FAN_AUTO;
8796         else if ((strlencmp(cmd, "level disengaged") == 0) |
8797                         (strlencmp(cmd, "level full-speed") == 0))
8798                 level = TP_EC_FAN_FULLSPEED;
8799         else if (sscanf(cmd, "level %d", &level) != 1)
8800                 return 0;
8801
8802         *rc = fan_set_level_safe(level);
8803         if (*rc == -ENXIO)
8804                 pr_err("level command accepted for unsupported access mode %d\n",
8805                        fan_control_access_mode);
8806         else if (!*rc)
8807                 tpacpi_disclose_usertask("procfs fan",
8808                         "set level to %d\n", level);
8809
8810         return 1;
8811 }
8812
8813 static int fan_write_cmd_enable(const char *cmd, int *rc)
8814 {
8815         if (strlencmp(cmd, "enable") != 0)
8816                 return 0;
8817
8818         *rc = fan_set_enable();
8819         if (*rc == -ENXIO)
8820                 pr_err("enable command accepted for unsupported access mode %d\n",
8821                        fan_control_access_mode);
8822         else if (!*rc)
8823                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8824
8825         return 1;
8826 }
8827
8828 static int fan_write_cmd_disable(const char *cmd, int *rc)
8829 {
8830         if (strlencmp(cmd, "disable") != 0)
8831                 return 0;
8832
8833         *rc = fan_set_disable();
8834         if (*rc == -ENXIO)
8835                 pr_err("disable command accepted for unsupported access mode %d\n",
8836                        fan_control_access_mode);
8837         else if (!*rc)
8838                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8839
8840         return 1;
8841 }
8842
8843 static int fan_write_cmd_speed(const char *cmd, int *rc)
8844 {
8845         int speed;
8846
8847         /* TODO:
8848          * Support speed <low> <medium> <high> ? */
8849
8850         if (sscanf(cmd, "speed %d", &speed) != 1)
8851                 return 0;
8852
8853         *rc = fan_set_speed(speed);
8854         if (*rc == -ENXIO)
8855                 pr_err("speed command accepted for unsupported access mode %d\n",
8856                        fan_control_access_mode);
8857         else if (!*rc)
8858                 tpacpi_disclose_usertask("procfs fan",
8859                         "set speed to %d\n", speed);
8860
8861         return 1;
8862 }
8863
8864 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8865 {
8866         int interval;
8867
8868         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8869                 return 0;
8870
8871         if (interval < 0 || interval > 120)
8872                 *rc = -EINVAL;
8873         else {
8874                 fan_watchdog_maxinterval = interval;
8875                 tpacpi_disclose_usertask("procfs fan",
8876                         "set watchdog timer to %d\n",
8877                         interval);
8878         }
8879
8880         return 1;
8881 }
8882
8883 static int fan_write(char *buf)
8884 {
8885         char *cmd;
8886         int rc = 0;
8887
8888         while (!rc && (cmd = next_cmd(&buf))) {
8889                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8890                       fan_write_cmd_level(cmd, &rc)) &&
8891                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8892                       (fan_write_cmd_enable(cmd, &rc) ||
8893                        fan_write_cmd_disable(cmd, &rc) ||
8894                        fan_write_cmd_watchdog(cmd, &rc))) &&
8895                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8896                       fan_write_cmd_speed(cmd, &rc))
8897                     )
8898                         rc = -EINVAL;
8899                 else if (!rc)
8900                         fan_watchdog_reset();
8901         }
8902
8903         return rc;
8904 }
8905
8906 static struct ibm_struct fan_driver_data = {
8907         .name = "fan",
8908         .read = fan_read,
8909         .write = fan_write,
8910         .exit = fan_exit,
8911         .suspend = fan_suspend,
8912         .resume = fan_resume,
8913 };
8914
8915 /*************************************************************************
8916  * Mute LED subdriver
8917  */
8918
8919
8920 struct tp_led_table {
8921         acpi_string name;
8922         int on_value;
8923         int off_value;
8924         int state;
8925 };
8926
8927 static struct tp_led_table led_tables[] = {
8928         [TPACPI_LED_MUTE] = {
8929                 .name = "SSMS",
8930                 .on_value = 1,
8931                 .off_value = 0,
8932         },
8933         [TPACPI_LED_MICMUTE] = {
8934                 .name = "MMTS",
8935                 .on_value = 2,
8936                 .off_value = 0,
8937         },
8938 };
8939
8940 static int mute_led_on_off(struct tp_led_table *t, bool state)
8941 {
8942         acpi_handle temp;
8943         int output;
8944
8945         if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp))) {
8946                 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
8947                 return -EIO;
8948         }
8949
8950         if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
8951                         state ? t->on_value : t->off_value))
8952                 return -EIO;
8953
8954         t->state = state;
8955         return state;
8956 }
8957
8958 int tpacpi_led_set(int whichled, bool on)
8959 {
8960         struct tp_led_table *t;
8961
8962         if (whichled < 0 || whichled >= TPACPI_LED_MAX)
8963                 return -EINVAL;
8964
8965         t = &led_tables[whichled];
8966         if (t->state < 0 || t->state == on)
8967                 return t->state;
8968         return mute_led_on_off(t, on);
8969 }
8970 EXPORT_SYMBOL_GPL(tpacpi_led_set);
8971
8972 static int mute_led_init(struct ibm_init_struct *iibm)
8973 {
8974         acpi_handle temp;
8975         int i;
8976
8977         for (i = 0; i < TPACPI_LED_MAX; i++) {
8978                 struct tp_led_table *t = &led_tables[i];
8979                 if (ACPI_SUCCESS(acpi_get_handle(hkey_handle, t->name, &temp)))
8980                         mute_led_on_off(t, false);
8981                 else
8982                         t->state = -ENODEV;
8983         }
8984         return 0;
8985 }
8986
8987 static void mute_led_exit(void)
8988 {
8989         int i;
8990
8991         for (i = 0; i < TPACPI_LED_MAX; i++)
8992                 tpacpi_led_set(i, false);
8993 }
8994
8995 static void mute_led_resume(void)
8996 {
8997         int i;
8998
8999         for (i = 0; i < TPACPI_LED_MAX; i++) {
9000                 struct tp_led_table *t = &led_tables[i];
9001                 if (t->state >= 0)
9002                         mute_led_on_off(t, t->state);
9003         }
9004 }
9005
9006 static struct ibm_struct mute_led_driver_data = {
9007         .name = "mute_led",
9008         .exit = mute_led_exit,
9009         .resume = mute_led_resume,
9010 };
9011
9012 /****************************************************************************
9013  ****************************************************************************
9014  *
9015  * Infrastructure
9016  *
9017  ****************************************************************************
9018  ****************************************************************************/
9019
9020 /*
9021  * HKEY event callout for other subdrivers go here
9022  * (yes, it is ugly, but it is quick, safe, and gets the job done
9023  */
9024 static void tpacpi_driver_event(const unsigned int hkey_event)
9025 {
9026         if (ibm_backlight_device) {
9027                 switch (hkey_event) {
9028                 case TP_HKEY_EV_BRGHT_UP:
9029                 case TP_HKEY_EV_BRGHT_DOWN:
9030                         tpacpi_brightness_notify_change();
9031                 }
9032         }
9033         if (alsa_card) {
9034                 switch (hkey_event) {
9035                 case TP_HKEY_EV_VOL_UP:
9036                 case TP_HKEY_EV_VOL_DOWN:
9037                 case TP_HKEY_EV_VOL_MUTE:
9038                         volume_alsa_notify_change();
9039                 }
9040         }
9041 }
9042
9043 static void hotkey_driver_event(const unsigned int scancode)
9044 {
9045         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
9046 }
9047
9048 /* sysfs name ---------------------------------------------------------- */
9049 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
9050                            struct device_attribute *attr,
9051                            char *buf)
9052 {
9053         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
9054 }
9055
9056 static DEVICE_ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
9057
9058 /* --------------------------------------------------------------------- */
9059
9060 /* /proc support */
9061 static struct proc_dir_entry *proc_dir;
9062
9063 /*
9064  * Module and infrastructure proble, init and exit handling
9065  */
9066
9067 static bool force_load;
9068
9069 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
9070 static const char * __init str_supported(int is_supported)
9071 {
9072         static char text_unsupported[] __initdata = "not supported";
9073
9074         return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
9075 }
9076 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
9077
9078 static void ibm_exit(struct ibm_struct *ibm)
9079 {
9080         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
9081
9082         list_del_init(&ibm->all_drivers);
9083
9084         if (ibm->flags.acpi_notify_installed) {
9085                 dbg_printk(TPACPI_DBG_EXIT,
9086                         "%s: acpi_remove_notify_handler\n", ibm->name);
9087                 BUG_ON(!ibm->acpi);
9088                 acpi_remove_notify_handler(*ibm->acpi->handle,
9089                                            ibm->acpi->type,
9090                                            dispatch_acpi_notify);
9091                 ibm->flags.acpi_notify_installed = 0;
9092         }
9093
9094         if (ibm->flags.proc_created) {
9095                 dbg_printk(TPACPI_DBG_EXIT,
9096                         "%s: remove_proc_entry\n", ibm->name);
9097                 remove_proc_entry(ibm->name, proc_dir);
9098                 ibm->flags.proc_created = 0;
9099         }
9100
9101         if (ibm->flags.acpi_driver_registered) {
9102                 dbg_printk(TPACPI_DBG_EXIT,
9103                         "%s: acpi_bus_unregister_driver\n", ibm->name);
9104                 BUG_ON(!ibm->acpi);
9105                 acpi_bus_unregister_driver(ibm->acpi->driver);
9106                 kfree(ibm->acpi->driver);
9107                 ibm->acpi->driver = NULL;
9108                 ibm->flags.acpi_driver_registered = 0;
9109         }
9110
9111         if (ibm->flags.init_called && ibm->exit) {
9112                 ibm->exit();
9113                 ibm->flags.init_called = 0;
9114         }
9115
9116         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
9117 }
9118
9119 static int __init ibm_init(struct ibm_init_struct *iibm)
9120 {
9121         int ret;
9122         struct ibm_struct *ibm = iibm->data;
9123         struct proc_dir_entry *entry;
9124
9125         BUG_ON(ibm == NULL);
9126
9127         INIT_LIST_HEAD(&ibm->all_drivers);
9128
9129         if (ibm->flags.experimental && !experimental)
9130                 return 0;
9131
9132         dbg_printk(TPACPI_DBG_INIT,
9133                 "probing for %s\n", ibm->name);
9134
9135         if (iibm->init) {
9136                 ret = iibm->init(iibm);
9137                 if (ret > 0)
9138                         return 0;       /* probe failed */
9139                 if (ret)
9140                         return ret;
9141
9142                 ibm->flags.init_called = 1;
9143         }
9144
9145         if (ibm->acpi) {
9146                 if (ibm->acpi->hid) {
9147                         ret = register_tpacpi_subdriver(ibm);
9148                         if (ret)
9149                                 goto err_out;
9150                 }
9151
9152                 if (ibm->acpi->notify) {
9153                         ret = setup_acpi_notify(ibm);
9154                         if (ret == -ENODEV) {
9155                                 pr_notice("disabling subdriver %s\n",
9156                                           ibm->name);
9157                                 ret = 0;
9158                                 goto err_out;
9159                         }
9160                         if (ret < 0)
9161                                 goto err_out;
9162                 }
9163         }
9164
9165         dbg_printk(TPACPI_DBG_INIT,
9166                 "%s installed\n", ibm->name);
9167
9168         if (ibm->read) {
9169                 umode_t mode = iibm->base_procfs_mode;
9170
9171                 if (!mode)
9172                         mode = S_IRUGO;
9173                 if (ibm->write)
9174                         mode |= S_IWUSR;
9175                 entry = proc_create_data(ibm->name, mode, proc_dir,
9176                                          &dispatch_proc_fops, ibm);
9177                 if (!entry) {
9178                         pr_err("unable to create proc entry %s\n", ibm->name);
9179                         ret = -ENODEV;
9180                         goto err_out;
9181                 }
9182                 ibm->flags.proc_created = 1;
9183         }
9184
9185         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
9186
9187         return 0;
9188
9189 err_out:
9190         dbg_printk(TPACPI_DBG_INIT,
9191                 "%s: at error exit path with result %d\n",
9192                 ibm->name, ret);
9193
9194         ibm_exit(ibm);
9195         return (ret < 0) ? ret : 0;
9196 }
9197
9198 /* Probing */
9199
9200 static bool __pure __init tpacpi_is_fw_digit(const char c)
9201 {
9202         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
9203 }
9204
9205 static bool __pure __init tpacpi_is_valid_fw_id(const char * const s,
9206                                                 const char t)
9207 {
9208         /*
9209          * Most models: xxyTkkWW (#.##c)
9210          * Ancient 570/600 and -SL lacks (#.##c)
9211          */
9212         if (s && strlen(s) >= 8 &&
9213                 tpacpi_is_fw_digit(s[0]) &&
9214                 tpacpi_is_fw_digit(s[1]) &&
9215                 s[2] == t &&
9216                 (s[3] == 'T' || s[3] == 'N') &&
9217                 tpacpi_is_fw_digit(s[4]) &&
9218                 tpacpi_is_fw_digit(s[5]))
9219                 return true;
9220
9221         /* New models: xxxyTkkW (#.##c); T550 and some others */
9222         return s && strlen(s) >= 8 &&
9223                 tpacpi_is_fw_digit(s[0]) &&
9224                 tpacpi_is_fw_digit(s[1]) &&
9225                 tpacpi_is_fw_digit(s[2]) &&
9226                 s[3] == t &&
9227                 (s[4] == 'T' || s[4] == 'N') &&
9228                 tpacpi_is_fw_digit(s[5]) &&
9229                 tpacpi_is_fw_digit(s[6]);
9230 }
9231
9232 /* returns 0 - probe ok, or < 0 - probe error.
9233  * Probe ok doesn't mean thinkpad found.
9234  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
9235 static int __must_check __init get_thinkpad_model_data(
9236                                                 struct thinkpad_id_data *tp)
9237 {
9238         const struct dmi_device *dev = NULL;
9239         char ec_fw_string[18];
9240         char const *s;
9241
9242         if (!tp)
9243                 return -EINVAL;
9244
9245         memset(tp, 0, sizeof(*tp));
9246
9247         if (dmi_name_in_vendors("IBM"))
9248                 tp->vendor = PCI_VENDOR_ID_IBM;
9249         else if (dmi_name_in_vendors("LENOVO"))
9250                 tp->vendor = PCI_VENDOR_ID_LENOVO;
9251         else
9252                 return 0;
9253
9254         s = dmi_get_system_info(DMI_BIOS_VERSION);
9255         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
9256         if (s && !tp->bios_version_str)
9257                 return -ENOMEM;
9258
9259         /* Really ancient ThinkPad 240X will fail this, which is fine */
9260         if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
9261               tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
9262                 return 0;
9263
9264         tp->bios_model = tp->bios_version_str[0]
9265                          | (tp->bios_version_str[1] << 8);
9266         tp->bios_release = (tp->bios_version_str[4] << 8)
9267                          | tp->bios_version_str[5];
9268
9269         /*
9270          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
9271          * X32 or newer, all Z series;  Some models must have an
9272          * up-to-date BIOS or they will not be detected.
9273          *
9274          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9275          */
9276         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
9277                 if (sscanf(dev->name,
9278                            "IBM ThinkPad Embedded Controller -[%17c",
9279                            ec_fw_string) == 1) {
9280                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
9281                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
9282
9283                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
9284                         if (!tp->ec_version_str)
9285                                 return -ENOMEM;
9286
9287                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
9288                                 tp->ec_model = ec_fw_string[0]
9289                                                 | (ec_fw_string[1] << 8);
9290                                 tp->ec_release = (ec_fw_string[4] << 8)
9291                                                 | ec_fw_string[5];
9292                         } else {
9293                                 pr_notice("ThinkPad firmware release %s "
9294                                           "doesn't match the known patterns\n",
9295                                           ec_fw_string);
9296                                 pr_notice("please report this to %s\n",
9297                                           TPACPI_MAIL);
9298                         }
9299                         break;
9300                 }
9301         }
9302
9303         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
9304         if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
9305                 tp->model_str = kstrdup(s, GFP_KERNEL);
9306                 if (!tp->model_str)
9307                         return -ENOMEM;
9308         } else {
9309                 s = dmi_get_system_info(DMI_BIOS_VENDOR);
9310                 if (s && !(strncasecmp(s, "Lenovo", 6))) {
9311                         tp->model_str = kstrdup(s, GFP_KERNEL);
9312                         if (!tp->model_str)
9313                                 return -ENOMEM;
9314                 }
9315         }
9316
9317         s = dmi_get_system_info(DMI_PRODUCT_NAME);
9318         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
9319         if (s && !tp->nummodel_str)
9320                 return -ENOMEM;
9321
9322         return 0;
9323 }
9324
9325 static int __init probe_for_thinkpad(void)
9326 {
9327         int is_thinkpad;
9328
9329         if (acpi_disabled)
9330                 return -ENODEV;
9331
9332         /* It would be dangerous to run the driver in this case */
9333         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
9334                 return -ENODEV;
9335
9336         /*
9337          * Non-ancient models have better DMI tagging, but very old models
9338          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
9339          */
9340         is_thinkpad = (thinkpad_id.model_str != NULL) ||
9341                       (thinkpad_id.ec_model != 0) ||
9342                       tpacpi_is_fw_known();
9343
9344         /* The EC handler is required */
9345         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
9346         if (!ec_handle) {
9347                 if (is_thinkpad)
9348                         pr_err("Not yet supported ThinkPad detected!\n");
9349                 return -ENODEV;
9350         }
9351
9352         if (!is_thinkpad && !force_load)
9353                 return -ENODEV;
9354
9355         return 0;
9356 }
9357
9358 static void __init thinkpad_acpi_init_banner(void)
9359 {
9360         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
9361         pr_info("%s\n", TPACPI_URL);
9362
9363         pr_info("ThinkPad BIOS %s, EC %s\n",
9364                 (thinkpad_id.bios_version_str) ?
9365                         thinkpad_id.bios_version_str : "unknown",
9366                 (thinkpad_id.ec_version_str) ?
9367                         thinkpad_id.ec_version_str : "unknown");
9368
9369         BUG_ON(!thinkpad_id.vendor);
9370
9371         if (thinkpad_id.model_str)
9372                 pr_info("%s %s, model %s\n",
9373                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
9374                                 "IBM" : ((thinkpad_id.vendor ==
9375                                                 PCI_VENDOR_ID_LENOVO) ?
9376                                         "Lenovo" : "Unknown vendor"),
9377                         thinkpad_id.model_str,
9378                         (thinkpad_id.nummodel_str) ?
9379                                 thinkpad_id.nummodel_str : "unknown");
9380 }
9381
9382 /* Module init, exit, parameters */
9383
9384 static struct ibm_init_struct ibms_init[] __initdata = {
9385         {
9386                 .data = &thinkpad_acpi_driver_data,
9387         },
9388         {
9389                 .init = hotkey_init,
9390                 .data = &hotkey_driver_data,
9391         },
9392         {
9393                 .init = bluetooth_init,
9394                 .data = &bluetooth_driver_data,
9395         },
9396         {
9397                 .init = wan_init,
9398                 .data = &wan_driver_data,
9399         },
9400         {
9401                 .init = uwb_init,
9402                 .data = &uwb_driver_data,
9403         },
9404 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
9405         {
9406                 .init = video_init,
9407                 .base_procfs_mode = S_IRUSR,
9408                 .data = &video_driver_data,
9409         },
9410 #endif
9411         {
9412                 .init = kbdlight_init,
9413                 .data = &kbdlight_driver_data,
9414         },
9415         {
9416                 .init = light_init,
9417                 .data = &light_driver_data,
9418         },
9419         {
9420                 .init = cmos_init,
9421                 .data = &cmos_driver_data,
9422         },
9423         {
9424                 .init = led_init,
9425                 .data = &led_driver_data,
9426         },
9427         {
9428                 .init = beep_init,
9429                 .data = &beep_driver_data,
9430         },
9431         {
9432                 .init = thermal_init,
9433                 .data = &thermal_driver_data,
9434         },
9435         {
9436                 .init = brightness_init,
9437                 .data = &brightness_driver_data,
9438         },
9439         {
9440                 .init = volume_init,
9441                 .data = &volume_driver_data,
9442         },
9443         {
9444                 .init = fan_init,
9445                 .data = &fan_driver_data,
9446         },
9447         {
9448                 .init = mute_led_init,
9449                 .data = &mute_led_driver_data,
9450         },
9451 };
9452
9453 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
9454 {
9455         unsigned int i;
9456         struct ibm_struct *ibm;
9457
9458         if (!kp || !kp->name || !val)
9459                 return -EINVAL;
9460
9461         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9462                 ibm = ibms_init[i].data;
9463                 WARN_ON(ibm == NULL);
9464
9465                 if (!ibm || !ibm->name)
9466                         continue;
9467
9468                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
9469                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
9470                                 return -ENOSPC;
9471                         strcpy(ibms_init[i].param, val);
9472                         strcat(ibms_init[i].param, ",");
9473                         return 0;
9474                 }
9475         }
9476
9477         return -EINVAL;
9478 }
9479
9480 module_param(experimental, int, 0444);
9481 MODULE_PARM_DESC(experimental,
9482                  "Enables experimental features when non-zero");
9483
9484 module_param_named(debug, dbg_level, uint, 0);
9485 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
9486
9487 module_param(force_load, bool, 0444);
9488 MODULE_PARM_DESC(force_load,
9489                  "Attempts to load the driver even on a "
9490                  "mis-identified ThinkPad when true");
9491
9492 module_param_named(fan_control, fan_control_allowed, bool, 0444);
9493 MODULE_PARM_DESC(fan_control,
9494                  "Enables setting fan parameters features when true");
9495
9496 module_param_named(brightness_mode, brightness_mode, uint, 0444);
9497 MODULE_PARM_DESC(brightness_mode,
9498                  "Selects brightness control strategy: "
9499                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
9500
9501 module_param(brightness_enable, uint, 0444);
9502 MODULE_PARM_DESC(brightness_enable,
9503                  "Enables backlight control when 1, disables when 0");
9504
9505 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
9506 module_param_named(volume_mode, volume_mode, uint, 0444);
9507 MODULE_PARM_DESC(volume_mode,
9508                  "Selects volume control strategy: "
9509                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
9510
9511 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
9512 MODULE_PARM_DESC(volume_capabilities,
9513                  "Selects the mixer capabilites: "
9514                  "0=auto, 1=volume and mute, 2=mute only");
9515
9516 module_param_named(volume_control, volume_control_allowed, bool, 0444);
9517 MODULE_PARM_DESC(volume_control,
9518                  "Enables software override for the console audio "
9519                  "control when true");
9520
9521 module_param_named(software_mute, software_mute_requested, bool, 0444);
9522 MODULE_PARM_DESC(software_mute,
9523                  "Request full software mute control");
9524
9525 /* ALSA module API parameters */
9526 module_param_named(index, alsa_index, int, 0444);
9527 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
9528 module_param_named(id, alsa_id, charp, 0444);
9529 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
9530 module_param_named(enable, alsa_enable, bool, 0444);
9531 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
9532 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
9533
9534 #define TPACPI_PARAM(feature) \
9535         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
9536         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
9537                          "at module load, see documentation")
9538
9539 TPACPI_PARAM(hotkey);
9540 TPACPI_PARAM(bluetooth);
9541 TPACPI_PARAM(video);
9542 TPACPI_PARAM(light);
9543 TPACPI_PARAM(cmos);
9544 TPACPI_PARAM(led);
9545 TPACPI_PARAM(beep);
9546 TPACPI_PARAM(brightness);
9547 TPACPI_PARAM(volume);
9548 TPACPI_PARAM(fan);
9549
9550 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
9551 module_param(dbg_wlswemul, uint, 0444);
9552 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
9553 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
9554 MODULE_PARM_DESC(wlsw_state,
9555                  "Initial state of the emulated WLSW switch");
9556
9557 module_param(dbg_bluetoothemul, uint, 0444);
9558 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
9559 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
9560 MODULE_PARM_DESC(bluetooth_state,
9561                  "Initial state of the emulated bluetooth switch");
9562
9563 module_param(dbg_wwanemul, uint, 0444);
9564 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
9565 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
9566 MODULE_PARM_DESC(wwan_state,
9567                  "Initial state of the emulated WWAN switch");
9568
9569 module_param(dbg_uwbemul, uint, 0444);
9570 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
9571 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
9572 MODULE_PARM_DESC(uwb_state,
9573                  "Initial state of the emulated UWB switch");
9574 #endif
9575
9576 static void thinkpad_acpi_module_exit(void)
9577 {
9578         struct ibm_struct *ibm, *itmp;
9579
9580         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
9581
9582         list_for_each_entry_safe_reverse(ibm, itmp,
9583                                          &tpacpi_all_drivers,
9584                                          all_drivers) {
9585                 ibm_exit(ibm);
9586         }
9587
9588         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
9589
9590         if (tpacpi_inputdev) {
9591                 if (tp_features.input_device_registered)
9592                         input_unregister_device(tpacpi_inputdev);
9593                 else
9594                         input_free_device(tpacpi_inputdev);
9595                 kfree(hotkey_keycode_map);
9596         }
9597
9598         if (tpacpi_hwmon)
9599                 hwmon_device_unregister(tpacpi_hwmon);
9600
9601         if (tp_features.sensors_pdev_attrs_registered)
9602                 device_remove_file(&tpacpi_sensors_pdev->dev, &dev_attr_name);
9603         if (tpacpi_sensors_pdev)
9604                 platform_device_unregister(tpacpi_sensors_pdev);
9605         if (tpacpi_pdev)
9606                 platform_device_unregister(tpacpi_pdev);
9607
9608         if (tp_features.sensors_pdrv_attrs_registered)
9609                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
9610         if (tp_features.platform_drv_attrs_registered)
9611                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
9612
9613         if (tp_features.sensors_pdrv_registered)
9614                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
9615
9616         if (tp_features.platform_drv_registered)
9617                 platform_driver_unregister(&tpacpi_pdriver);
9618
9619         if (proc_dir)
9620                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
9621
9622         if (tpacpi_wq)
9623                 destroy_workqueue(tpacpi_wq);
9624
9625         kfree(thinkpad_id.bios_version_str);
9626         kfree(thinkpad_id.ec_version_str);
9627         kfree(thinkpad_id.model_str);
9628         kfree(thinkpad_id.nummodel_str);
9629 }
9630
9631
9632 static int __init thinkpad_acpi_module_init(void)
9633 {
9634         int ret, i;
9635
9636         tpacpi_lifecycle = TPACPI_LIFE_INIT;
9637
9638         /* Driver-level probe */
9639
9640         ret = get_thinkpad_model_data(&thinkpad_id);
9641         if (ret) {
9642                 pr_err("unable to get DMI data: %d\n", ret);
9643                 thinkpad_acpi_module_exit();
9644                 return ret;
9645         }
9646         ret = probe_for_thinkpad();
9647         if (ret) {
9648                 thinkpad_acpi_module_exit();
9649                 return ret;
9650         }
9651
9652         /* Driver initialization */
9653
9654         thinkpad_acpi_init_banner();
9655         tpacpi_check_outdated_fw();
9656
9657         TPACPI_ACPIHANDLE_INIT(ecrd);
9658         TPACPI_ACPIHANDLE_INIT(ecwr);
9659
9660         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
9661         if (!tpacpi_wq) {
9662                 thinkpad_acpi_module_exit();
9663                 return -ENOMEM;
9664         }
9665
9666         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
9667         if (!proc_dir) {
9668                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
9669                 thinkpad_acpi_module_exit();
9670                 return -ENODEV;
9671         }
9672
9673         ret = platform_driver_register(&tpacpi_pdriver);
9674         if (ret) {
9675                 pr_err("unable to register main platform driver\n");
9676                 thinkpad_acpi_module_exit();
9677                 return ret;
9678         }
9679         tp_features.platform_drv_registered = 1;
9680
9681         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
9682         if (ret) {
9683                 pr_err("unable to register hwmon platform driver\n");
9684                 thinkpad_acpi_module_exit();
9685                 return ret;
9686         }
9687         tp_features.sensors_pdrv_registered = 1;
9688
9689         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
9690         if (!ret) {
9691                 tp_features.platform_drv_attrs_registered = 1;
9692                 ret = tpacpi_create_driver_attributes(
9693                                         &tpacpi_hwmon_pdriver.driver);
9694         }
9695         if (ret) {
9696                 pr_err("unable to create sysfs driver attributes\n");
9697                 thinkpad_acpi_module_exit();
9698                 return ret;
9699         }
9700         tp_features.sensors_pdrv_attrs_registered = 1;
9701
9702
9703         /* Device initialization */
9704         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9705                                                         NULL, 0);
9706         if (IS_ERR(tpacpi_pdev)) {
9707                 ret = PTR_ERR(tpacpi_pdev);
9708                 tpacpi_pdev = NULL;
9709                 pr_err("unable to register platform device\n");
9710                 thinkpad_acpi_module_exit();
9711                 return ret;
9712         }
9713         tpacpi_sensors_pdev = platform_device_register_simple(
9714                                                 TPACPI_HWMON_DRVR_NAME,
9715                                                 -1, NULL, 0);
9716         if (IS_ERR(tpacpi_sensors_pdev)) {
9717                 ret = PTR_ERR(tpacpi_sensors_pdev);
9718                 tpacpi_sensors_pdev = NULL;
9719                 pr_err("unable to register hwmon platform device\n");
9720                 thinkpad_acpi_module_exit();
9721                 return ret;
9722         }
9723         ret = device_create_file(&tpacpi_sensors_pdev->dev, &dev_attr_name);
9724         if (ret) {
9725                 pr_err("unable to create sysfs hwmon device attributes\n");
9726                 thinkpad_acpi_module_exit();
9727                 return ret;
9728         }
9729         tp_features.sensors_pdev_attrs_registered = 1;
9730         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9731         if (IS_ERR(tpacpi_hwmon)) {
9732                 ret = PTR_ERR(tpacpi_hwmon);
9733                 tpacpi_hwmon = NULL;
9734                 pr_err("unable to register hwmon device\n");
9735                 thinkpad_acpi_module_exit();
9736                 return ret;
9737         }
9738         mutex_init(&tpacpi_inputdev_send_mutex);
9739         tpacpi_inputdev = input_allocate_device();
9740         if (!tpacpi_inputdev) {
9741                 thinkpad_acpi_module_exit();
9742                 return -ENOMEM;
9743         } else {
9744                 /* Prepare input device, but don't register */
9745                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9746                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9747                 tpacpi_inputdev->id.bustype = BUS_HOST;
9748                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9749                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9750                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9751                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9752         }
9753
9754         /* Init subdriver dependencies */
9755         tpacpi_detect_brightness_capabilities();
9756
9757         /* Init subdrivers */
9758         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9759                 ret = ibm_init(&ibms_init[i]);
9760                 if (ret >= 0 && *ibms_init[i].param)
9761                         ret = ibms_init[i].data->write(ibms_init[i].param);
9762                 if (ret < 0) {
9763                         thinkpad_acpi_module_exit();
9764                         return ret;
9765                 }
9766         }
9767
9768         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9769
9770         ret = input_register_device(tpacpi_inputdev);
9771         if (ret < 0) {
9772                 pr_err("unable to register input device\n");
9773                 thinkpad_acpi_module_exit();
9774                 return ret;
9775         } else {
9776                 tp_features.input_device_registered = 1;
9777         }
9778
9779         return 0;
9780 }
9781
9782 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9783
9784 /*
9785  * This will autoload the driver in almost every ThinkPad
9786  * in widespread use.
9787  *
9788  * Only _VERY_ old models, like the 240, 240x and 570 lack
9789  * the HKEY event interface.
9790  */
9791 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9792
9793 /*
9794  * DMI matching for module autoloading
9795  *
9796  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9797  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9798  *
9799  * Only models listed in thinkwiki will be supported, so add yours
9800  * if it is not there yet.
9801  */
9802 #define IBM_BIOS_MODULE_ALIAS(__type) \
9803         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9804
9805 /* Ancient thinkpad BIOSes have to be identified by
9806  * BIOS type or model number, and there are far less
9807  * BIOS types than model numbers... */
9808 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
9809
9810 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9811 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9812 MODULE_DESCRIPTION(TPACPI_DESC);
9813 MODULE_VERSION(TPACPI_VERSION);
9814 MODULE_LICENSE("GPL");
9815
9816 module_init(thinkpad_acpi_module_init);
9817 module_exit(thinkpad_acpi_module_exit);