drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  25
  26 #define TPACPI_VERSION "0.24"
  27 #define TPACPI_SYSFS_VERSION 0x020700
  28
  29 /*
  30  *  Changelog:
  31  *  2007-10-20          changelog trimmed down
  32  *
  33  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  34  *                      drivers/misc.
  35  *
  36  *  2006-11-22  0.13    new maintainer
  37  *                      changelog now lives in git commit history, and will
  38  *                      not be updated further in-file.
  39  *
  40  *  2005-03-17  0.11    support for 600e, 770x
  41  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  42  *
  43  *  2005-01-16  0.9     use MODULE_VERSION
  44  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  45  *                      fix parameter passing on module loading
  46  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  47  *                          thanks to Jim Radford <radford@blackbean.org>
  48  *  2004-11-08  0.8     fix init error case, don't return from a macro
  49  *                          thanks to Chris Wright <chrisw@osdl.org>
  50  */
  51
  52 #include <linux/kernel.h>
  53 #include <linux/module.h>
  54 #include <linux/init.h>
  55 #include <linux/types.h>
  56 #include <linux/string.h>
  57 #include <linux/list.h>
  58 #include <linux/mutex.h>
  59 #include <linux/sched.h>
  60 #include <linux/kthread.h>
  61 #include <linux/freezer.h>
  62 #include <linux/delay.h>
  63 #include <linux/slab.h>
  64
  65 #include <linux/nvram.h>
  66 #include <linux/proc_fs.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/sysfs.h>
  69 #include <linux/backlight.h>
  70 #include <linux/fb.h>
  71 #include <linux/platform_device.h>
  72 #include <linux/hwmon.h>
  73 #include <linux/hwmon-sysfs.h>
  74 #include <linux/input.h>
  75 #include <linux/leds.h>
  76 #include <linux/rfkill.h>
  77 #include <asm/uaccess.h>
  78
  79 #include <linux/dmi.h>
  80 #include <linux/jiffies.h>
  81 #include <linux/workqueue.h>
  82
  83 #include <sound/core.h>
  84 #include <sound/control.h>
  85 #include <sound/initval.h>
  86
  87 #include <acpi/acpi_drivers.h>
  88
  89 #include <linux/pci_ids.h>
  90
  91
  92 /* ThinkPad CMOS commands */
  93 #define TP_CMOS_VOLUME_DOWN     0
  94 #define TP_CMOS_VOLUME_UP       1
  95 #define TP_CMOS_VOLUME_MUTE     2
  96 #define TP_CMOS_BRIGHTNESS_UP   4
  97 #define TP_CMOS_BRIGHTNESS_DOWN 5
  98 #define TP_CMOS_THINKLIGHT_ON   12
  99 #define TP_CMOS_THINKLIGHT_OFF  13
 100
 101 /* NVRAM Addresses */
 102 enum tp_nvram_addr {
 103         TP_NVRAM_ADDR_HK2               = 0x57,
 104         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
 105         TP_NVRAM_ADDR_VIDEO             = 0x59,
 106         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
 107         TP_NVRAM_ADDR_MIXER             = 0x60,
 108 };
 109
 110 /* NVRAM bit masks */
 111 enum {
 112         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 113         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 114         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 115         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 116         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 117         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 118         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 119         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 120         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 121         TP_NVRAM_MASK_MUTE              = 0x40,
 122         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 123         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 124         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 125 };
 126
 127 /* Misc NVRAM-related */
 128 enum {
 129         TP_NVRAM_LEVEL_VOLUME_MAX = 14,
 130 };
 131
 132 /* ACPI HIDs */
 133 #define TPACPI_ACPI_IBM_HKEY_HID        "IBM0068"
 134 #define TPACPI_ACPI_LENOVO_HKEY_HID     "LEN0068"
 135 #define TPACPI_ACPI_EC_HID              "PNP0C09"
 136
 137 /* Input IDs */
 138 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 139 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 140
 141 /* ACPI \WGSV commands */
 142 enum {
 143         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 144         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 145         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 146         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 147 };
 148
 149 /* TP_ACPI_WGSV_GET_STATE bits */
 150 enum {
 151         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 152         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 153         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 154         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 155         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 156         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 157         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 158         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 159         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 160         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 161 };
 162
 163 /* HKEY events */
 164 enum tpacpi_hkey_event_t {
 165         /* Hotkey-related */
 166         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 167         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 168         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 169         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 170         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 171         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 172
 173         /* Reasons for waking up from S3/S4 */
 174         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 175         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 176         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 177         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 178         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 179         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 180
 181         /* Auto-sleep after eject request */
 182         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 183         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 184
 185         /* Misc bay events */
 186         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 187         TP_HKEY_EV_HOTPLUG_DOCK         = 0x4010, /* docked into hotplug dock
 188                                                      or port replicator */
 189         TP_HKEY_EV_HOTPLUG_UNDOCK       = 0x4011, /* undocked from hotplug
 190                                                      dock or port replicator */
 191
 192         /* User-interface events */
 193         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 194         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 195         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 196         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 197         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 198         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 199         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 200
 201         /* Key-related user-interface events */
 202         TP_HKEY_EV_KEY_NUMLOCK          = 0x6000, /* NumLock key pressed */
 203         TP_HKEY_EV_KEY_FN               = 0x6005, /* Fn key pressed? E420 */
 204
 205         /* Thermal events */
 206         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 207         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 208         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 209         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 210         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 211
 212         /* AC-related events */
 213         TP_HKEY_EV_AC_CHANGED           = 0x6040, /* AC status changed */
 214
 215         /* Misc */
 216         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 217 };
 218
 219 /****************************************************************************
 220  * Main driver
 221  */
 222
 223 #define TPACPI_NAME "thinkpad"
 224 #define TPACPI_DESC "ThinkPad ACPI Extras"
 225 #define TPACPI_FILE TPACPI_NAME "_acpi"
 226 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 227 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 228
 229 #define TPACPI_PROC_DIR "ibm"
 230 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 231 #define TPACPI_DRVR_NAME TPACPI_FILE
 232 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 233 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 234
 235 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 236 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 237
 238 #define TPACPI_MAX_ACPI_ARGS 3
 239
 240 /* Debugging printk groups */
 241 #define TPACPI_DBG_ALL          0xffff
 242 #define TPACPI_DBG_DISCLOSETASK 0x8000
 243 #define TPACPI_DBG_INIT         0x0001
 244 #define TPACPI_DBG_EXIT         0x0002
 245 #define TPACPI_DBG_RFKILL       0x0004
 246 #define TPACPI_DBG_HKEY         0x0008
 247 #define TPACPI_DBG_FAN          0x0010
 248 #define TPACPI_DBG_BRGHT        0x0020
 249 #define TPACPI_DBG_MIXER        0x0040
 250
 251 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 252 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 253 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 254
 255
 256 /****************************************************************************
 257  * Driver-wide structs and misc. variables
 258  */
 259
 260 struct ibm_struct;
 261
 262 struct tp_acpi_drv_struct {
 263         const struct acpi_device_id *hid;
 264         struct acpi_driver *driver;
 265
 266         void (*notify) (struct ibm_struct *, u32);
 267         acpi_handle *handle;
 268         u32 type;
 269         struct acpi_device *device;
 270 };
 271
 272 struct ibm_struct {
 273         char *name;
 274
 275         int (*read) (struct seq_file *);
 276         int (*write) (char *);
 277         void (*exit) (void);
 278         void (*resume) (void);
 279         void (*suspend) (void);
 280         void (*shutdown) (void);
 281
 282         struct list_head all_drivers;
 283
 284         struct tp_acpi_drv_struct *acpi;
 285
 286         struct {
 287                 u8 acpi_driver_registered:1;
 288                 u8 acpi_notify_installed:1;
 289                 u8 proc_created:1;
 290                 u8 init_called:1;
 291                 u8 experimental:1;
 292         } flags;
 293 };
 294
 295 struct ibm_init_struct {
 296         char param[32];
 297
 298         int (*init) (struct ibm_init_struct *);
 299         umode_t base_procfs_mode;
 300         struct ibm_struct *data;
 301 };
 302
 303 static struct {
 304         u32 bluetooth:1;
 305         u32 hotkey:1;
 306         u32 hotkey_mask:1;
 307         u32 hotkey_wlsw:1;
 308         u32 hotkey_tablet:1;
 309         u32 light:1;
 310         u32 light_status:1;
 311         u32 bright_acpimode:1;
 312         u32 bright_unkfw:1;
 313         u32 wan:1;
 314         u32 uwb:1;
 315         u32 fan_ctrl_status_undef:1;
 316         u32 second_fan:1;
 317         u32 beep_needs_two_args:1;
 318         u32 mixer_no_level_control:1;
 319         u32 input_device_registered:1;
 320         u32 platform_drv_registered:1;
 321         u32 platform_drv_attrs_registered:1;
 322         u32 sensors_pdrv_registered:1;
 323         u32 sensors_pdrv_attrs_registered:1;
 324         u32 sensors_pdev_attrs_registered:1;
 325         u32 hotkey_poll_active:1;
 326 } tp_features;
 327
 328 static struct {
 329         u16 hotkey_mask_ff:1;
 330         u16 volume_ctrl_forbidden:1;
 331 } tp_warned;
 332
 333 struct thinkpad_id_data {
 334         unsigned int vendor;    /* ThinkPad vendor:
 335                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 336
 337         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 338         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 339
 340         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 341         u16 ec_model;
 342         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 343         u16 ec_release;
 344
 345         char *model_str;        /* ThinkPad T43 */
 346         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 347 };
 348 static struct thinkpad_id_data thinkpad_id;
 349
 350 static enum {
 351         TPACPI_LIFE_INIT = 0,
 352         TPACPI_LIFE_RUNNING,
 353         TPACPI_LIFE_EXITING,
 354 } tpacpi_lifecycle;
 355
 356 static int experimental;
 357 static u32 dbg_level;
 358
 359 static struct workqueue_struct *tpacpi_wq;
 360
 361 enum led_status_t {
 362         TPACPI_LED_OFF = 0,
 363         TPACPI_LED_ON,
 364         TPACPI_LED_BLINK,
 365 };
 366
 367 /* Special LED class that can defer work */
 368 struct tpacpi_led_classdev {
 369         struct led_classdev led_classdev;
 370         struct work_struct work;
 371         enum led_status_t new_state;
 372         unsigned int led;
 373 };
 374
 375 /* brightness level capabilities */
 376 static unsigned int bright_maxlvl;      /* 0 = unknown */
 377
 378 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 379 static int dbg_wlswemul;
 380 static bool tpacpi_wlsw_emulstate;
 381 static int dbg_bluetoothemul;
 382 static bool tpacpi_bluetooth_emulstate;
 383 static int dbg_wwanemul;
 384 static bool tpacpi_wwan_emulstate;
 385 static int dbg_uwbemul;
 386 static bool tpacpi_uwb_emulstate;
 387 #endif
 388
 389
 390 /*************************************************************************
 391  *  Debugging helpers
 392  */
 393
 394 #define dbg_printk(a_dbg_level, format, arg...)                         \
 395 do {                                                                    \
 396         if (dbg_level & (a_dbg_level))                                  \
 397                 printk(KERN_DEBUG pr_fmt("%s: " format),                \
 398                        __func__, ##arg);                                \
 399 } while (0)
 400
 401 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 402 #define vdbg_printk dbg_printk
 403 static const char *str_supported(int is_supported);
 404 #else
 405 static inline const char *str_supported(int is_supported) { return ""; }
 406 #define vdbg_printk(a_dbg_level, format, arg...)        \
 407         no_printk(format, ##arg)
 408 #endif
 409
 410 static void tpacpi_log_usertask(const char * const what)
 411 {
 412         printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
 413                what, task_tgid_vnr(current));
 414 }
 415
 416 #define tpacpi_disclose_usertask(what, format, arg...)                  \
 417 do {                                                                    \
 418         if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&           \
 419                      (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {      \
 420                 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),        \
 421                        what, task_tgid_vnr(current), ## arg);           \
 422         }                                                               \
 423 } while (0)
 424
 425 /*
 426  * Quirk handling helpers
 427  *
 428  * ThinkPad IDs and versions seen in the field so far
 429  * are two-characters from the set [0-9A-Z], i.e. base 36.
 430  *
 431  * We use values well outside that range as specials.
 432  */
 433
 434 #define TPACPI_MATCH_ANY                0xffffU
 435 #define TPACPI_MATCH_UNKNOWN            0U
 436
 437 /* TPID('1', 'Y') == 0x5931 */
 438 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 439
 440 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 441         { .vendor = PCI_VENDOR_ID_IBM,          \
 442           .bios = TPID(__id1, __id2),           \
 443           .ec = TPACPI_MATCH_ANY,               \
 444           .quirks = (__quirk) }
 445
 446 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 447         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 448           .bios = TPID(__id1, __id2),           \
 449           .ec = TPACPI_MATCH_ANY,               \
 450           .quirks = (__quirk) }
 451
 452 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 453         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 454           .bios = TPACPI_MATCH_ANY,             \
 455           .ec = TPID(__id1, __id2),             \
 456           .quirks = (__quirk) }
 457
 458 struct tpacpi_quirk {
 459         unsigned int vendor;
 460         u16 bios;
 461         u16 ec;
 462         unsigned long quirks;
 463 };
 464
 465 /**
 466  * tpacpi_check_quirks() - search BIOS/EC version on a list
 467  * @qlist:              array of &struct tpacpi_quirk
 468  * @qlist_size:         number of elements in @qlist
 469  *
 470  * Iterates over a quirks list until one is found that matches the
 471  * ThinkPad's vendor, BIOS and EC model.
 472  *
 473  * Returns 0 if nothing matches, otherwise returns the quirks field of
 474  * the matching &struct tpacpi_quirk entry.
 475  *
 476  * The match criteria is: vendor, ec and bios much match.
 477  */
 478 static unsigned long __init tpacpi_check_quirks(
 479                         const struct tpacpi_quirk *qlist,
 480                         unsigned int qlist_size)
 481 {
 482         while (qlist_size) {
 483                 if ((qlist->vendor == thinkpad_id.vendor ||
 484                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 485                     (qlist->bios == thinkpad_id.bios_model ||
 486                                 qlist->bios == TPACPI_MATCH_ANY) &&
 487                     (qlist->ec == thinkpad_id.ec_model ||
 488                                 qlist->ec == TPACPI_MATCH_ANY))
 489                         return qlist->quirks;
 490
 491                 qlist_size--;
 492                 qlist++;
 493         }
 494         return 0;
 495 }
 496
 497 static inline bool __pure __init tpacpi_is_lenovo(void)
 498 {
 499         return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
 500 }
 501
 502 static inline bool __pure __init tpacpi_is_ibm(void)
 503 {
 504         return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
 505 }
 506
 507 /****************************************************************************
 508  ****************************************************************************
 509  *
 510  * ACPI Helpers and device model
 511  *
 512  ****************************************************************************
 513  ****************************************************************************/
 514
 515 /*************************************************************************
 516  * ACPI basic handles
 517  */
 518
 519 static acpi_handle root_handle;
 520 static acpi_handle ec_handle;
 521
 522 #define TPACPI_HANDLE(object, parent, paths...)                 \
 523         static acpi_handle  object##_handle;                    \
 524         static const acpi_handle * const object##_parent __initconst =  \
 525                                                 &parent##_handle; \
 526         static char *object##_paths[] __initdata = { paths }
 527
 528 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 529 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 530
 531 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 532                                         /* T4x, X31, X40 */
 533            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 534            "\\CMS",             /* R40, R40e */
 535            );                   /* all others */
 536
 537 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 538            "^HKEY",             /* R30, R31 */
 539            "HKEY",              /* all others */
 540            );                   /* 570 */
 541
 542 /*************************************************************************
 543  * ACPI helpers
 544  */
 545
 546 static int acpi_evalf(acpi_handle handle,
 547                       int *res, char *method, char *fmt, ...)
 548 {
 549         char *fmt0 = fmt;
 550         struct acpi_object_list params;
 551         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 552         struct acpi_buffer result, *resultp;
 553         union acpi_object out_obj;
 554         acpi_status status;
 555         va_list ap;
 556         char res_type;
 557         int success;
 558         int quiet;
 559
 560         if (!*fmt) {
 561                 pr_err("acpi_evalf() called with empty format\n");
 562                 return 0;
 563         }
 564
 565         if (*fmt == 'q') {
 566                 quiet = 1;
 567                 fmt++;
 568         } else
 569                 quiet = 0;
 570
 571         res_type = *(fmt++);
 572
 573         params.count = 0;
 574         params.pointer = &in_objs[0];
 575
 576         va_start(ap, fmt);
 577         while (*fmt) {
 578                 char c = *(fmt++);
 579                 switch (c) {
 580                 case 'd':       /* int */
 581                         in_objs[params.count].integer.value = va_arg(ap, int);
 582                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 583                         break;
 584                         /* add more types as needed */
 585                 default:
 586                         pr_err("acpi_evalf() called "
 587                                "with invalid format character '%c'\n", c);
 588                         va_end(ap);
 589                         return 0;
 590                 }
 591         }
 592         va_end(ap);
 593
 594         if (res_type != 'v') {
 595                 result.length = sizeof(out_obj);
 596                 result.pointer = &out_obj;
 597                 resultp = &result;
 598         } else
 599                 resultp = NULL;
 600
 601         status = acpi_evaluate_object(handle, method, &params, resultp);
 602
 603         switch (res_type) {
 604         case 'd':               /* int */
 605                 success = (status == AE_OK &&
 606                            out_obj.type == ACPI_TYPE_INTEGER);
 607                 if (success && res)
 608                         *res = out_obj.integer.value;
 609                 break;
 610         case 'v':               /* void */
 611                 success = status == AE_OK;
 612                 break;
 613                 /* add more types as needed */
 614         default:
 615                 pr_err("acpi_evalf() called "
 616                        "with invalid format character '%c'\n", res_type);
 617                 return 0;
 618         }
 619
 620         if (!success && !quiet)
 621                 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
 622                        method, fmt0, acpi_format_exception(status));
 623
 624         return success;
 625 }
 626
 627 static int acpi_ec_read(int i, u8 *p)
 628 {
 629         int v;
 630
 631         if (ecrd_handle) {
 632                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 633                         return 0;
 634                 *p = v;
 635         } else {
 636                 if (ec_read(i, p) < 0)
 637                         return 0;
 638         }
 639
 640         return 1;
 641 }
 642
 643 static int acpi_ec_write(int i, u8 v)
 644 {
 645         if (ecwr_handle) {
 646                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 647                         return 0;
 648         } else {
 649                 if (ec_write(i, v) < 0)
 650                         return 0;
 651         }
 652
 653         return 1;
 654 }
 655
 656 static int issue_thinkpad_cmos_command(int cmos_cmd)
 657 {
 658         if (!cmos_handle)
 659                 return -ENXIO;
 660
 661         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 662                 return -EIO;
 663
 664         return 0;
 665 }
 666
 667 /*************************************************************************
 668  * ACPI device model
 669  */
 670
 671 #define TPACPI_ACPIHANDLE_INIT(object) \
 672         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 673                 object##_paths, ARRAY_SIZE(object##_paths))
 674
 675 static void __init drv_acpi_handle_init(const char *name,
 676                            acpi_handle *handle, const acpi_handle parent,
 677                            char **paths, const int num_paths)
 678 {
 679         int i;
 680         acpi_status status;
 681
 682         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 683                 name);
 684
 685         for (i = 0; i < num_paths; i++) {
 686                 status = acpi_get_handle(parent, paths[i], handle);
 687                 if (ACPI_SUCCESS(status)) {
 688                         dbg_printk(TPACPI_DBG_INIT,
 689                                    "Found ACPI handle %s for %s\n",
 690                                    paths[i], name);
 691                         return;
 692                 }
 693         }
 694
 695         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 696                     name);
 697         *handle = NULL;
 698 }
 699
 700 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
 701                         u32 level, void *context, void **return_value)
 702 {
 703         *(acpi_handle *)return_value = handle;
 704
 705         return AE_CTRL_TERMINATE;
 706 }
 707
 708 static void __init tpacpi_acpi_handle_locate(const char *name,
 709                 const char *hid,
 710                 acpi_handle *handle)
 711 {
 712         acpi_status status;
 713         acpi_handle device_found;
 714
 715         BUG_ON(!name || !hid || !handle);
 716         vdbg_printk(TPACPI_DBG_INIT,
 717                         "trying to locate ACPI handle for %s, using HID %s\n",
 718                         name, hid);
 719
 720         memset(&device_found, 0, sizeof(device_found));
 721         status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
 722                                   (void *)name, &device_found);
 723
 724         *handle = NULL;
 725
 726         if (ACPI_SUCCESS(status)) {
 727                 *handle = device_found;
 728                 dbg_printk(TPACPI_DBG_INIT,
 729                            "Found ACPI handle for %s\n", name);
 730         } else {
 731                 vdbg_printk(TPACPI_DBG_INIT,
 732                             "Could not locate an ACPI handle for %s: %s\n",
 733                             name, acpi_format_exception(status));
 734         }
 735 }
 736
 737 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 738 {
 739         struct ibm_struct *ibm = data;
 740
 741         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 742                 return;
 743
 744         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 745                 return;
 746
 747         ibm->acpi->notify(ibm, event);
 748 }
 749
 750 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 751 {
 752         acpi_status status;
 753         int rc;
 754
 755         BUG_ON(!ibm->acpi);
 756
 757         if (!*ibm->acpi->handle)
 758                 return 0;
 759
 760         vdbg_printk(TPACPI_DBG_INIT,
 761                 "setting up ACPI notify for %s\n", ibm->name);
 762
 763         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 764         if (rc < 0) {
 765                 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc);
 766                 return -ENODEV;
 767         }
 768
 769         ibm->acpi->device->driver_data = ibm;
 770         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 771                 TPACPI_ACPI_EVENT_PREFIX,
 772                 ibm->name);
 773
 774         status = acpi_install_notify_handler(*ibm->acpi->handle,
 775                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 776         if (ACPI_FAILURE(status)) {
 777                 if (status == AE_ALREADY_EXISTS) {
 778                         pr_notice("another device driver is already "
 779                                   "handling %s events\n", ibm->name);
 780                 } else {
 781                         pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 782                                ibm->name, acpi_format_exception(status));
 783                 }
 784                 return -ENODEV;
 785         }
 786         ibm->flags.acpi_notify_installed = 1;
 787         return 0;
 788 }
 789
 790 static int __init tpacpi_device_add(struct acpi_device *device)
 791 {
 792         return 0;
 793 }
 794
 795 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 796 {
 797         int rc;
 798
 799         dbg_printk(TPACPI_DBG_INIT,
 800                 "registering %s as an ACPI driver\n", ibm->name);
 801
 802         BUG_ON(!ibm->acpi);
 803
 804         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 805         if (!ibm->acpi->driver) {
 806                 pr_err("failed to allocate memory for ibm->acpi->driver\n");
 807                 return -ENOMEM;
 808         }
 809
 810         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 811         ibm->acpi->driver->ids = ibm->acpi->hid;
 812
 813         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 814
 815         rc = acpi_bus_register_driver(ibm->acpi->driver);
 816         if (rc < 0) {
 817                 pr_err("acpi_bus_register_driver(%s) failed: %d\n",
 818                        ibm->name, rc);
 819                 kfree(ibm->acpi->driver);
 820                 ibm->acpi->driver = NULL;
 821         } else if (!rc)
 822                 ibm->flags.acpi_driver_registered = 1;
 823
 824         return rc;
 825 }
 826
 827
 828 /****************************************************************************
 829  ****************************************************************************
 830  *
 831  * Procfs Helpers
 832  *
 833  ****************************************************************************
 834  ****************************************************************************/
 835
 836 static int dispatch_proc_show(struct seq_file *m, void *v)
 837 {
 838         struct ibm_struct *ibm = m->private;
 839
 840         if (!ibm || !ibm->read)
 841                 return -EINVAL;
 842         return ibm->read(m);
 843 }
 844
 845 static int dispatch_proc_open(struct inode *inode, struct file *file)
 846 {
 847         return single_open(file, dispatch_proc_show, PDE_DATA(inode));
 848 }
 849
 850 static ssize_t dispatch_proc_write(struct file *file,
 851                         const char __user *userbuf,
 852                         size_t count, loff_t *pos)
 853 {
 854         struct ibm_struct *ibm = PDE_DATA(file_inode(file));
 855         char *kernbuf;
 856         int ret;
 857
 858         if (!ibm || !ibm->write)
 859                 return -EINVAL;
 860         if (count > PAGE_SIZE - 2)
 861                 return -EINVAL;
 862
 863         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 864         if (!kernbuf)
 865                 return -ENOMEM;
 866
 867         if (copy_from_user(kernbuf, userbuf, count)) {
 868                 kfree(kernbuf);
 869                 return -EFAULT;
 870         }
 871
 872         kernbuf[count] = 0;
 873         strcat(kernbuf, ",");
 874         ret = ibm->write(kernbuf);
 875         if (ret == 0)
 876                 ret = count;
 877
 878         kfree(kernbuf);
 879
 880         return ret;
 881 }
 882
 883 static const struct file_operations dispatch_proc_fops = {
 884         .owner          = THIS_MODULE,
 885         .open           = dispatch_proc_open,
 886         .read           = seq_read,
 887         .llseek         = seq_lseek,
 888         .release        = single_release,
 889         .write          = dispatch_proc_write,
 890 };
 891
 892 static char *next_cmd(char **cmds)
 893 {
 894         char *start = *cmds;
 895         char *end;
 896
 897         while ((end = strchr(start, ',')) && end == start)
 898                 start = end + 1;
 899
 900         if (!end)
 901                 return NULL;
 902
 903         *end = 0;
 904         *cmds = end + 1;
 905         return start;
 906 }
 907
 908
 909 /****************************************************************************
 910  ****************************************************************************
 911  *
 912  * Device model: input, hwmon and platform
 913  *
 914  ****************************************************************************
 915  ****************************************************************************/
 916
 917 static struct platform_device *tpacpi_pdev;
 918 static struct platform_device *tpacpi_sensors_pdev;
 919 static struct device *tpacpi_hwmon;
 920 static struct input_dev *tpacpi_inputdev;
 921 static struct mutex tpacpi_inputdev_send_mutex;
 922 static LIST_HEAD(tpacpi_all_drivers);
 923
 924 #ifdef CONFIG_PM_SLEEP
 925 static int tpacpi_suspend_handler(struct device *dev)
 926 {
 927         struct ibm_struct *ibm, *itmp;
 928
 929         list_for_each_entry_safe(ibm, itmp,
 930                                  &tpacpi_all_drivers,
 931                                  all_drivers) {
 932                 if (ibm->suspend)
 933                         (ibm->suspend)();
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int tpacpi_resume_handler(struct device *dev)
 940 {
 941         struct ibm_struct *ibm, *itmp;
 942
 943         list_for_each_entry_safe(ibm, itmp,
 944                                  &tpacpi_all_drivers,
 945                                  all_drivers) {
 946                 if (ibm->resume)
 947                         (ibm->resume)();
 948         }
 949
 950         return 0;
 951 }
 952 #endif
 953
 954 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
 955                          tpacpi_suspend_handler, tpacpi_resume_handler);
 956
 957 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 958 {
 959         struct ibm_struct *ibm, *itmp;
 960
 961         list_for_each_entry_safe(ibm, itmp,
 962                                  &tpacpi_all_drivers,
 963                                  all_drivers) {
 964                 if (ibm->shutdown)
 965                         (ibm->shutdown)();
 966         }
 967 }
 968
 969 static struct platform_driver tpacpi_pdriver = {
 970         .driver = {
 971                 .name = TPACPI_DRVR_NAME,
 972                 .owner = THIS_MODULE,
 973                 .pm = &tpacpi_pm,
 974         },
 975         .shutdown = tpacpi_shutdown_handler,
 976 };
 977
 978 static struct platform_driver tpacpi_hwmon_pdriver = {
 979         .driver = {
 980                 .name = TPACPI_HWMON_DRVR_NAME,
 981                 .owner = THIS_MODULE,
 982         },
 983 };
 984
 985 /*************************************************************************
 986  * sysfs support helpers
 987  */
 988
 989 struct attribute_set {
 990         unsigned int members, max_members;
 991         struct attribute_group group;
 992 };
 993
 994 struct attribute_set_obj {
 995         struct attribute_set s;
 996         struct attribute *a;
 997 } __attribute__((packed));
 998
 999 static struct attribute_set *create_attr_set(unsigned int max_members,
1000                                                 const char *name)
1001 {
1002         struct attribute_set_obj *sobj;
1003
1004         if (max_members == 0)
1005                 return NULL;
1006
1007         /* Allocates space for implicit NULL at the end too */
1008         sobj = kzalloc(sizeof(struct attribute_set_obj) +
1009                     max_members * sizeof(struct attribute *),
1010                     GFP_KERNEL);
1011         if (!sobj)
1012                 return NULL;
1013         sobj->s.max_members = max_members;
1014         sobj->s.group.attrs = &sobj->a;
1015         sobj->s.group.name = name;
1016
1017         return &sobj->s;
1018 }
1019
1020 #define destroy_attr_set(_set) \
1021         kfree(_set);
1022
1023 /* not multi-threaded safe, use it in a single thread per set */
1024 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
1025 {
1026         if (!s || !attr)
1027                 return -EINVAL;
1028
1029         if (s->members >= s->max_members)
1030                 return -ENOMEM;
1031
1032         s->group.attrs[s->members] = attr;
1033         s->members++;
1034
1035         return 0;
1036 }
1037
1038 static int add_many_to_attr_set(struct attribute_set *s,
1039                         struct attribute **attr,
1040                         unsigned int count)
1041 {
1042         int i, res;
1043
1044         for (i = 0; i < count; i++) {
1045                 res = add_to_attr_set(s, attr[i]);
1046                 if (res)
1047                         return res;
1048         }
1049
1050         return 0;
1051 }
1052
1053 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1054 {
1055         sysfs_remove_group(kobj, &s->group);
1056         destroy_attr_set(s);
1057 }
1058
1059 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1060         sysfs_create_group(_kobj, &_attr_set->group)
1061
1062 static int parse_strtoul(const char *buf,
1063                 unsigned long max, unsigned long *value)
1064 {
1065         char *endp;
1066
1067         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1068         endp = skip_spaces(endp);
1069         if (*endp || *value > max)
1070                 return -EINVAL;
1071
1072         return 0;
1073 }
1074
1075 static void tpacpi_disable_brightness_delay(void)
1076 {
1077         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1078                 pr_notice("ACPI backlight control delay disabled\n");
1079 }
1080
1081 static void printk_deprecated_attribute(const char * const what,
1082                                         const char * const details)
1083 {
1084         tpacpi_log_usertask("deprecated sysfs attribute");
1085         pr_warn("WARNING: sysfs attribute %s is deprecated and "
1086                 "will be removed. %s\n",
1087                 what, details);
1088 }
1089
1090 /*************************************************************************
1091  * rfkill and radio control support helpers
1092  */
1093
1094 /*
1095  * ThinkPad-ACPI firmware handling model:
1096  *
1097  * WLSW (master wireless switch) is event-driven, and is common to all
1098  * firmware-controlled radios.  It cannot be controlled, just monitored,
1099  * as expected.  It overrides all radio state in firmware
1100  *
1101  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1102  * (TODO: verify how WLSW interacts with the returned radio state).
1103  *
1104  * The only time there are shadow radio state changes, is when
1105  * masked-off hotkeys are used.
1106  */
1107
1108 /*
1109  * Internal driver API for radio state:
1110  *
1111  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1112  * bool: true means radio blocked (off)
1113  */
1114 enum tpacpi_rfkill_state {
1115         TPACPI_RFK_RADIO_OFF = 0,
1116         TPACPI_RFK_RADIO_ON
1117 };
1118
1119 /* rfkill switches */
1120 enum tpacpi_rfk_id {
1121         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1122         TPACPI_RFK_WWAN_SW_ID,
1123         TPACPI_RFK_UWB_SW_ID,
1124         TPACPI_RFK_SW_MAX
1125 };
1126
1127 static const char *tpacpi_rfkill_names[] = {
1128         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1129         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1130         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1131         [TPACPI_RFK_SW_MAX] = NULL
1132 };
1133
1134 /* ThinkPad-ACPI rfkill subdriver */
1135 struct tpacpi_rfk {
1136         struct rfkill *rfkill;
1137         enum tpacpi_rfk_id id;
1138         const struct tpacpi_rfk_ops *ops;
1139 };
1140
1141 struct tpacpi_rfk_ops {
1142         /* firmware interface */
1143         int (*get_status)(void);
1144         int (*set_status)(const enum tpacpi_rfkill_state);
1145 };
1146
1147 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1148
1149 /* Query FW and update rfkill sw state for a given rfkill switch */
1150 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1151 {
1152         int status;
1153
1154         if (!tp_rfk)
1155                 return -ENODEV;
1156
1157         status = (tp_rfk->ops->get_status)();
1158         if (status < 0)
1159                 return status;
1160
1161         rfkill_set_sw_state(tp_rfk->rfkill,
1162                             (status == TPACPI_RFK_RADIO_OFF));
1163
1164         return status;
1165 }
1166
1167 /* Query FW and update rfkill sw state for all rfkill switches */
1168 static void tpacpi_rfk_update_swstate_all(void)
1169 {
1170         unsigned int i;
1171
1172         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1173                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1174 }
1175
1176 /*
1177  * Sync the HW-blocking state of all rfkill switches,
1178  * do notice it causes the rfkill core to schedule uevents
1179  */
1180 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1181 {
1182         unsigned int i;
1183         struct tpacpi_rfk *tp_rfk;
1184
1185         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1186                 tp_rfk = tpacpi_rfkill_switches[i];
1187                 if (tp_rfk) {
1188                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1189                                                 blocked)) {
1190                                 /* ignore -- we track sw block */
1191                         }
1192                 }
1193         }
1194 }
1195
1196 /* Call to get the WLSW state from the firmware */
1197 static int hotkey_get_wlsw(void);
1198
1199 /* Call to query WLSW state and update all rfkill switches */
1200 static bool tpacpi_rfk_check_hwblock_state(void)
1201 {
1202         int res = hotkey_get_wlsw();
1203         int hw_blocked;
1204
1205         /* When unknown or unsupported, we have to assume it is unblocked */
1206         if (res < 0)
1207                 return false;
1208
1209         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1210         tpacpi_rfk_update_hwblock_state(hw_blocked);
1211
1212         return hw_blocked;
1213 }
1214
1215 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1216 {
1217         struct tpacpi_rfk *tp_rfk = data;
1218         int res;
1219
1220         dbg_printk(TPACPI_DBG_RFKILL,
1221                    "request to change radio state to %s\n",
1222                    blocked ? "blocked" : "unblocked");
1223
1224         /* try to set radio state */
1225         res = (tp_rfk->ops->set_status)(blocked ?
1226                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1227
1228         /* and update the rfkill core with whatever the FW really did */
1229         tpacpi_rfk_update_swstate(tp_rfk);
1230
1231         return (res < 0) ? res : 0;
1232 }
1233
1234 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1235         .set_block = tpacpi_rfk_hook_set_block,
1236 };
1237
1238 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1239                         const struct tpacpi_rfk_ops *tp_rfkops,
1240                         const enum rfkill_type rfktype,
1241                         const char *name,
1242                         const bool set_default)
1243 {
1244         struct tpacpi_rfk *atp_rfk;
1245         int res;
1246         bool sw_state = false;
1247         bool hw_state;
1248         int sw_status;
1249
1250         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1251
1252         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1253         if (atp_rfk)
1254                 atp_rfk->rfkill = rfkill_alloc(name,
1255                                                 &tpacpi_pdev->dev,
1256                                                 rfktype,
1257                                                 &tpacpi_rfk_rfkill_ops,
1258                                                 atp_rfk);
1259         if (!atp_rfk || !atp_rfk->rfkill) {
1260                 pr_err("failed to allocate memory for rfkill class\n");
1261                 kfree(atp_rfk);
1262                 return -ENOMEM;
1263         }
1264
1265         atp_rfk->id = id;
1266         atp_rfk->ops = tp_rfkops;
1267
1268         sw_status = (tp_rfkops->get_status)();
1269         if (sw_status < 0) {
1270                 pr_err("failed to read initial state for %s, error %d\n",
1271                        name, sw_status);
1272         } else {
1273                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1274                 if (set_default) {
1275                         /* try to keep the initial state, since we ask the
1276                          * firmware to preserve it across S5 in NVRAM */
1277                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1278                 }
1279         }
1280         hw_state = tpacpi_rfk_check_hwblock_state();
1281         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1282
1283         res = rfkill_register(atp_rfk->rfkill);
1284         if (res < 0) {
1285                 pr_err("failed to register %s rfkill switch: %d\n", name, res);
1286                 rfkill_destroy(atp_rfk->rfkill);
1287                 kfree(atp_rfk);
1288                 return res;
1289         }
1290
1291         tpacpi_rfkill_switches[id] = atp_rfk;
1292
1293         pr_info("rfkill switch %s: radio is %sblocked\n",
1294                 name, (sw_state || hw_state) ? "" : "un");
1295         return 0;
1296 }
1297
1298 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1299 {
1300         struct tpacpi_rfk *tp_rfk;
1301
1302         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1303
1304         tp_rfk = tpacpi_rfkill_switches[id];
1305         if (tp_rfk) {
1306                 rfkill_unregister(tp_rfk->rfkill);
1307                 rfkill_destroy(tp_rfk->rfkill);
1308                 tpacpi_rfkill_switches[id] = NULL;
1309                 kfree(tp_rfk);
1310         }
1311 }
1312
1313 static void printk_deprecated_rfkill_attribute(const char * const what)
1314 {
1315         printk_deprecated_attribute(what,
1316                         "Please switch to generic rfkill before year 2010");
1317 }
1318
1319 /* sysfs <radio> enable ------------------------------------------------ */
1320 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1321                                             struct device_attribute *attr,
1322                                             char *buf)
1323 {
1324         int status;
1325
1326         printk_deprecated_rfkill_attribute(attr->attr.name);
1327
1328         /* This is in the ABI... */
1329         if (tpacpi_rfk_check_hwblock_state()) {
1330                 status = TPACPI_RFK_RADIO_OFF;
1331         } else {
1332                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1333                 if (status < 0)
1334                         return status;
1335         }
1336
1337         return snprintf(buf, PAGE_SIZE, "%d\n",
1338                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1339 }
1340
1341 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1342                             struct device_attribute *attr,
1343                             const char *buf, size_t count)
1344 {
1345         unsigned long t;
1346         int res;
1347
1348         printk_deprecated_rfkill_attribute(attr->attr.name);
1349
1350         if (parse_strtoul(buf, 1, &t))
1351                 return -EINVAL;
1352
1353         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1354
1355         /* This is in the ABI... */
1356         if (tpacpi_rfk_check_hwblock_state() && !!t)
1357                 return -EPERM;
1358
1359         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1360                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1361         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1362
1363         return (res < 0) ? res : count;
1364 }
1365
1366 /* procfs -------------------------------------------------------------- */
1367 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1368 {
1369         if (id >= TPACPI_RFK_SW_MAX)
1370                 seq_printf(m, "status:\t\tnot supported\n");
1371         else {
1372                 int status;
1373
1374                 /* This is in the ABI... */
1375                 if (tpacpi_rfk_check_hwblock_state()) {
1376                         status = TPACPI_RFK_RADIO_OFF;
1377                 } else {
1378                         status = tpacpi_rfk_update_swstate(
1379                                                 tpacpi_rfkill_switches[id]);
1380                         if (status < 0)
1381                                 return status;
1382                 }
1383
1384                 seq_printf(m, "status:\t\t%s\n",
1385                                 (status == TPACPI_RFK_RADIO_ON) ?
1386                                         "enabled" : "disabled");
1387                 seq_printf(m, "commands:\tenable, disable\n");
1388         }
1389
1390         return 0;
1391 }
1392
1393 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1394 {
1395         char *cmd;
1396         int status = -1;
1397         int res = 0;
1398
1399         if (id >= TPACPI_RFK_SW_MAX)
1400                 return -ENODEV;
1401
1402         while ((cmd = next_cmd(&buf))) {
1403                 if (strlencmp(cmd, "enable") == 0)
1404                         status = TPACPI_RFK_RADIO_ON;
1405                 else if (strlencmp(cmd, "disable") == 0)
1406                         status = TPACPI_RFK_RADIO_OFF;
1407                 else
1408                         return -EINVAL;
1409         }
1410
1411         if (status != -1) {
1412                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1413                                 (status == TPACPI_RFK_RADIO_ON) ?
1414                                                 "enable" : "disable",
1415                                 tpacpi_rfkill_names[id]);
1416                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1417                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1418         }
1419
1420         return res;
1421 }
1422
1423 /*************************************************************************
1424  * thinkpad-acpi driver attributes
1425  */
1426
1427 /* interface_version --------------------------------------------------- */
1428 static ssize_t tpacpi_driver_interface_version_show(
1429                                 struct device_driver *drv,
1430                                 char *buf)
1431 {
1432         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1433 }
1434
1435 static DRIVER_ATTR(interface_version, S_IRUGO,
1436                 tpacpi_driver_interface_version_show, NULL);
1437
1438 /* debug_level --------------------------------------------------------- */
1439 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1440                                                 char *buf)
1441 {
1442         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1443 }
1444
1445 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1446                                                 const char *buf, size_t count)
1447 {
1448         unsigned long t;
1449
1450         if (parse_strtoul(buf, 0xffff, &t))
1451                 return -EINVAL;
1452
1453         dbg_level = t;
1454
1455         return count;
1456 }
1457
1458 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1459                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1460
1461 /* version ------------------------------------------------------------- */
1462 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1463                                                 char *buf)
1464 {
1465         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1466                         TPACPI_DESC, TPACPI_VERSION);
1467 }
1468
1469 static DRIVER_ATTR(version, S_IRUGO,
1470                 tpacpi_driver_version_show, NULL);
1471
1472 /* --------------------------------------------------------------------- */
1473
1474 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1475
1476 /* wlsw_emulstate ------------------------------------------------------ */
1477 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1478                                                 char *buf)
1479 {
1480         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1481 }
1482
1483 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1484                                                 const char *buf, size_t count)
1485 {
1486         unsigned long t;
1487
1488         if (parse_strtoul(buf, 1, &t))
1489                 return -EINVAL;
1490
1491         if (tpacpi_wlsw_emulstate != !!t) {
1492                 tpacpi_wlsw_emulstate = !!t;
1493                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1494         }
1495
1496         return count;
1497 }
1498
1499 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1500                 tpacpi_driver_wlsw_emulstate_show,
1501                 tpacpi_driver_wlsw_emulstate_store);
1502
1503 /* bluetooth_emulstate ------------------------------------------------- */
1504 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1505                                         struct device_driver *drv,
1506                                         char *buf)
1507 {
1508         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1509 }
1510
1511 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1512                                         struct device_driver *drv,
1513                                         const char *buf, size_t count)
1514 {
1515         unsigned long t;
1516
1517         if (parse_strtoul(buf, 1, &t))
1518                 return -EINVAL;
1519
1520         tpacpi_bluetooth_emulstate = !!t;
1521
1522         return count;
1523 }
1524
1525 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1526                 tpacpi_driver_bluetooth_emulstate_show,
1527                 tpacpi_driver_bluetooth_emulstate_store);
1528
1529 /* wwan_emulstate ------------------------------------------------- */
1530 static ssize_t tpacpi_driver_wwan_emulstate_show(
1531                                         struct device_driver *drv,
1532                                         char *buf)
1533 {
1534         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1535 }
1536
1537 static ssize_t tpacpi_driver_wwan_emulstate_store(
1538                                         struct device_driver *drv,
1539                                         const char *buf, size_t count)
1540 {
1541         unsigned long t;
1542
1543         if (parse_strtoul(buf, 1, &t))
1544                 return -EINVAL;
1545
1546         tpacpi_wwan_emulstate = !!t;
1547
1548         return count;
1549 }
1550
1551 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1552                 tpacpi_driver_wwan_emulstate_show,
1553                 tpacpi_driver_wwan_emulstate_store);
1554
1555 /* uwb_emulstate ------------------------------------------------- */
1556 static ssize_t tpacpi_driver_uwb_emulstate_show(
1557                                         struct device_driver *drv,
1558                                         char *buf)
1559 {
1560         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1561 }
1562
1563 static ssize_t tpacpi_driver_uwb_emulstate_store(
1564                                         struct device_driver *drv,
1565                                         const char *buf, size_t count)
1566 {
1567         unsigned long t;
1568
1569         if (parse_strtoul(buf, 1, &t))
1570                 return -EINVAL;
1571
1572         tpacpi_uwb_emulstate = !!t;
1573
1574         return count;
1575 }
1576
1577 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1578                 tpacpi_driver_uwb_emulstate_show,
1579                 tpacpi_driver_uwb_emulstate_store);
1580 #endif
1581
1582 /* --------------------------------------------------------------------- */
1583
1584 static struct driver_attribute *tpacpi_driver_attributes[] = {
1585         &driver_attr_debug_level, &driver_attr_version,
1586         &driver_attr_interface_version,
1587 };
1588
1589 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1590 {
1591         int i, res;
1592
1593         i = 0;
1594         res = 0;
1595         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1596                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1597                 i++;
1598         }
1599
1600 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1601         if (!res && dbg_wlswemul)
1602                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1603         if (!res && dbg_bluetoothemul)
1604                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1605         if (!res && dbg_wwanemul)
1606                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1607         if (!res && dbg_uwbemul)
1608                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1609 #endif
1610
1611         return res;
1612 }
1613
1614 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1615 {
1616         int i;
1617
1618         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1619                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1620
1621 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1622         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1623         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1624         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1625         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1626 #endif
1627 }
1628
1629 /*************************************************************************
1630  * Firmware Data
1631  */
1632
1633 /*
1634  * Table of recommended minimum BIOS versions
1635  *
1636  * Reasons for listing:
1637  *    1. Stable BIOS, listed because the unknown amount of
1638  *       bugs and bad ACPI behaviour on older versions
1639  *
1640  *    2. BIOS or EC fw with known bugs that trigger on Linux
1641  *
1642  *    3. BIOS with known reduced functionality in older versions
1643  *
1644  *  We recommend the latest BIOS and EC version.
1645  *  We only support the latest BIOS and EC fw version as a rule.
1646  *
1647  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1648  *  Information from users in ThinkWiki
1649  *
1650  *  WARNING: we use this table also to detect that the machine is
1651  *  a ThinkPad in some cases, so don't remove entries lightly.
1652  */
1653
1654 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1655         { .vendor       = (__v),                        \
1656           .bios         = TPID(__id1, __id2),           \
1657           .ec           = TPACPI_MATCH_ANY,             \
1658           .quirks       = TPACPI_MATCH_ANY << 16        \
1659                           | (__bv1) << 8 | (__bv2) }
1660
1661 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1662                 __eid, __ev1, __ev2)                    \
1663         { .vendor       = (__v),                        \
1664           .bios         = TPID(__bid1, __bid2),         \
1665           .ec           = __eid,                        \
1666           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1667                           | (__bv1) << 8 | (__bv2) }
1668
1669 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1670         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1671
1672 /* Outdated IBM BIOSes often lack the EC id string */
1673 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1674         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1675                 __bv1, __bv2, TPID(__id1, __id2),       \
1676                 __ev1, __ev2),                          \
1677         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1678                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1679                 __ev1, __ev2)
1680
1681 /* Outdated IBM BIOSes often lack the EC id string */
1682 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1683                 __eid1, __eid2, __ev1, __ev2)           \
1684         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1685                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1686                 __ev1, __ev2),                          \
1687         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1688                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1689                 __ev1, __ev2)
1690
1691 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1692         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1693
1694 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1695         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1696                 __bv1, __bv2, TPID(__id1, __id2),       \
1697                 __ev1, __ev2)
1698
1699 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1700                 __eid1, __eid2, __ev1, __ev2)           \
1701         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1702                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1703                 __ev1, __ev2)
1704
1705 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1706         /*  Numeric models ------------------ */
1707         /*      FW MODEL   BIOS VERS          */
1708         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1709         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1710         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1711         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1712         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1713         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1714         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1715         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1716         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1717
1718         /* A-series ------------------------- */
1719         /*      FW MODEL   BIOS VERS  EC VERS */
1720         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1721         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1722         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1723         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1724         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1725         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1726         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1727         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1728         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1729         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1730         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1731
1732         /* G-series ------------------------- */
1733         /*      FW MODEL   BIOS VERS          */
1734         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1735         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1736
1737         /* R-series, T-series --------------- */
1738         /*      FW MODEL   BIOS VERS  EC VERS */
1739         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1740         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1741         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1742         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1743         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1744         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1745         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1746                                                     T40/p, T41/p, T42/p (1) */
1747         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1748         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1749         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1750         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1751
1752         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1753         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1754         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1755         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1756         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1757         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1758
1759         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1760         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1761         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1762
1763         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1764         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1765         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1766
1767         /* X-series ------------------------- */
1768         /*      FW MODEL   BIOS VERS  EC VERS */
1769         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1770         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1771         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1772         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1773         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1774         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1775         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1776
1777         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1778         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1779
1780         /* (0) - older versions lack DMI EC fw string and functionality */
1781         /* (1) - older versions known to lack functionality */
1782 };
1783
1784 #undef TPV_QL1
1785 #undef TPV_QL0
1786 #undef TPV_QI2
1787 #undef TPV_QI1
1788 #undef TPV_QI0
1789 #undef TPV_Q_X
1790 #undef TPV_Q
1791
1792 static void __init tpacpi_check_outdated_fw(void)
1793 {
1794         unsigned long fwvers;
1795         u16 ec_version, bios_version;
1796
1797         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1798                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1799
1800         if (!fwvers)
1801                 return;
1802
1803         bios_version = fwvers & 0xffffU;
1804         ec_version = (fwvers >> 16) & 0xffffU;
1805
1806         /* note that unknown versions are set to 0x0000 and we use that */
1807         if ((bios_version > thinkpad_id.bios_release) ||
1808             (ec_version > thinkpad_id.ec_release &&
1809                                 ec_version != TPACPI_MATCH_ANY)) {
1810                 /*
1811                  * The changelogs would let us track down the exact
1812                  * reason, but it is just too much of a pain to track
1813                  * it.  We only list BIOSes that are either really
1814                  * broken, or really stable to begin with, so it is
1815                  * best if the user upgrades the firmware anyway.
1816                  */
1817                 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1818                 pr_warn("WARNING: This firmware may be missing critical bug "
1819                         "fixes and/or important features\n");
1820         }
1821 }
1822
1823 static bool __init tpacpi_is_fw_known(void)
1824 {
1825         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1826                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1827 }
1828
1829 /****************************************************************************
1830  ****************************************************************************
1831  *
1832  * Subdrivers
1833  *
1834  ****************************************************************************
1835  ****************************************************************************/
1836
1837 /*************************************************************************
1838  * thinkpad-acpi metadata subdriver
1839  */
1840
1841 static int thinkpad_acpi_driver_read(struct seq_file *m)
1842 {
1843         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1844         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1845         return 0;
1846 }
1847
1848 static struct ibm_struct thinkpad_acpi_driver_data = {
1849         .name = "driver",
1850         .read = thinkpad_acpi_driver_read,
1851 };
1852
1853 /*************************************************************************
1854  * Hotkey subdriver
1855  */
1856
1857 /*
1858  * ThinkPad firmware event model
1859  *
1860  * The ThinkPad firmware has two main event interfaces: normal ACPI
1861  * notifications (which follow the ACPI standard), and a private event
1862  * interface.
1863  *
1864  * The private event interface also issues events for the hotkeys.  As
1865  * the driver gained features, the event handling code ended up being
1866  * built around the hotkey subdriver.  This will need to be refactored
1867  * to a more formal event API eventually.
1868  *
1869  * Some "hotkeys" are actually supposed to be used as event reports,
1870  * such as "brightness has changed", "volume has changed", depending on
1871  * the ThinkPad model and how the firmware is operating.
1872  *
1873  * Unlike other classes, hotkey-class events have mask/unmask control on
1874  * non-ancient firmware.  However, how it behaves changes a lot with the
1875  * firmware model and version.
1876  */
1877
1878 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1879         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1880         TP_ACPI_HOTKEYSCAN_FNF2,
1881         TP_ACPI_HOTKEYSCAN_FNF3,
1882         TP_ACPI_HOTKEYSCAN_FNF4,
1883         TP_ACPI_HOTKEYSCAN_FNF5,
1884         TP_ACPI_HOTKEYSCAN_FNF6,
1885         TP_ACPI_HOTKEYSCAN_FNF7,
1886         TP_ACPI_HOTKEYSCAN_FNF8,
1887         TP_ACPI_HOTKEYSCAN_FNF9,
1888         TP_ACPI_HOTKEYSCAN_FNF10,
1889         TP_ACPI_HOTKEYSCAN_FNF11,
1890         TP_ACPI_HOTKEYSCAN_FNF12,
1891         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1892         TP_ACPI_HOTKEYSCAN_FNINSERT,
1893         TP_ACPI_HOTKEYSCAN_FNDELETE,
1894         TP_ACPI_HOTKEYSCAN_FNHOME,
1895         TP_ACPI_HOTKEYSCAN_FNEND,
1896         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1897         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1898         TP_ACPI_HOTKEYSCAN_FNSPACE,
1899         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1900         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1901         TP_ACPI_HOTKEYSCAN_MUTE,
1902         TP_ACPI_HOTKEYSCAN_THINKPAD,
1903         TP_ACPI_HOTKEYSCAN_UNK1,
1904         TP_ACPI_HOTKEYSCAN_UNK2,
1905         TP_ACPI_HOTKEYSCAN_UNK3,
1906         TP_ACPI_HOTKEYSCAN_UNK4,
1907         TP_ACPI_HOTKEYSCAN_UNK5,
1908         TP_ACPI_HOTKEYSCAN_UNK6,
1909         TP_ACPI_HOTKEYSCAN_UNK7,
1910         TP_ACPI_HOTKEYSCAN_UNK8,
1911
1912         /* Hotkey keymap size */
1913         TPACPI_HOTKEY_MAP_LEN
1914 };
1915
1916 enum {  /* Keys/events available through NVRAM polling */
1917         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1918         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1919 };
1920
1921 enum {  /* Positions of some of the keys in hotkey masks */
1922         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1923         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1924         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1925         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1926         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1927         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1928         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1929         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1930         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1931         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1932         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1933 };
1934
1935 enum {  /* NVRAM to ACPI HKEY group map */
1936         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1937                                           TP_ACPI_HKEY_ZOOM_MASK |
1938                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1939                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1940         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1941                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1942         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1943                                           TP_ACPI_HKEY_VOLDWN_MASK |
1944                                           TP_ACPI_HKEY_MUTE_MASK,
1945 };
1946
1947 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1948 struct tp_nvram_state {
1949        u16 thinkpad_toggle:1;
1950        u16 zoom_toggle:1;
1951        u16 display_toggle:1;
1952        u16 thinklight_toggle:1;
1953        u16 hibernate_toggle:1;
1954        u16 displayexp_toggle:1;
1955        u16 display_state:1;
1956        u16 brightness_toggle:1;
1957        u16 volume_toggle:1;
1958        u16 mute:1;
1959
1960        u8 brightness_level;
1961        u8 volume_level;
1962 };
1963
1964 /* kthread for the hotkey poller */
1965 static struct task_struct *tpacpi_hotkey_task;
1966
1967 /*
1968  * Acquire mutex to write poller control variables as an
1969  * atomic block.
1970  *
1971  * Increment hotkey_config_change when changing them if you
1972  * want the kthread to forget old state.
1973  *
1974  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1975  */
1976 static struct mutex hotkey_thread_data_mutex;
1977 static unsigned int hotkey_config_change;
1978
1979 /*
1980  * hotkey poller control variables
1981  *
1982  * Must be atomic or readers will also need to acquire mutex
1983  *
1984  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1985  * should be used only when the changes need to be taken as
1986  * a block, OR when one needs to force the kthread to forget
1987  * old state.
1988  */
1989 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1990 static unsigned int hotkey_poll_freq = 10; /* Hz */
1991
1992 #define HOTKEY_CONFIG_CRITICAL_START \
1993         do { \
1994                 mutex_lock(&hotkey_thread_data_mutex); \
1995                 hotkey_config_change++; \
1996         } while (0);
1997 #define HOTKEY_CONFIG_CRITICAL_END \
1998         mutex_unlock(&hotkey_thread_data_mutex);
1999
2000 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2001
2002 #define hotkey_source_mask 0U
2003 #define HOTKEY_CONFIG_CRITICAL_START
2004 #define HOTKEY_CONFIG_CRITICAL_END
2005
2006 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2007
2008 static struct mutex hotkey_mutex;
2009
2010 static enum {   /* Reasons for waking up */
2011         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2012         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2013         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2014 } hotkey_wakeup_reason;
2015
2016 static int hotkey_autosleep_ack;
2017
2018 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2019 static u32 hotkey_all_mask;             /* all events supported in fw */
2020 static u32 hotkey_reserved_mask;        /* events better left disabled */
2021 static u32 hotkey_driver_mask;          /* events needed by the driver */
2022 static u32 hotkey_user_mask;            /* events visible to userspace */
2023 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2024
2025 static u16 *hotkey_keycode_map;
2026
2027 static struct attribute_set *hotkey_dev_attributes;
2028
2029 static void tpacpi_driver_event(const unsigned int hkey_event);
2030 static void hotkey_driver_event(const unsigned int scancode);
2031 static void hotkey_poll_setup(const bool may_warn);
2032
2033 /* HKEY.MHKG() return bits */
2034 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2035
2036 static int hotkey_get_wlsw(void)
2037 {
2038         int status;
2039
2040         if (!tp_features.hotkey_wlsw)
2041                 return -ENODEV;
2042
2043 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2044         if (dbg_wlswemul)
2045                 return (tpacpi_wlsw_emulstate) ?
2046                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2047 #endif
2048
2049         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2050                 return -EIO;
2051
2052         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2053 }
2054
2055 static int hotkey_get_tablet_mode(int *status)
2056 {
2057         int s;
2058
2059         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2060                 return -EIO;
2061
2062         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2063         return 0;
2064 }
2065
2066 /*
2067  * Reads current event mask from firmware, and updates
2068  * hotkey_acpi_mask accordingly.  Also resets any bits
2069  * from hotkey_user_mask that are unavailable to be
2070  * delivered (shadow requirement of the userspace ABI).
2071  *
2072  * Call with hotkey_mutex held
2073  */
2074 static int hotkey_mask_get(void)
2075 {
2076         if (tp_features.hotkey_mask) {
2077                 u32 m = 0;
2078
2079                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2080                         return -EIO;
2081
2082                 hotkey_acpi_mask = m;
2083         } else {
2084                 /* no mask support doesn't mean no event support... */
2085                 hotkey_acpi_mask = hotkey_all_mask;
2086         }
2087
2088         /* sync userspace-visible mask */
2089         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2090
2091         return 0;
2092 }
2093
2094 void static hotkey_mask_warn_incomplete_mask(void)
2095 {
2096         /* log only what the user can fix... */
2097         const u32 wantedmask = hotkey_driver_mask &
2098                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2099                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2100
2101         if (wantedmask)
2102                 pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2103 }
2104
2105 /*
2106  * Set the firmware mask when supported
2107  *
2108  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2109  *
2110  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2111  *
2112  * Call with hotkey_mutex held
2113  */
2114 static int hotkey_mask_set(u32 mask)
2115 {
2116         int i;
2117         int rc = 0;
2118
2119         const u32 fwmask = mask & ~hotkey_source_mask;
2120
2121         if (tp_features.hotkey_mask) {
2122                 for (i = 0; i < 32; i++) {
2123                         if (!acpi_evalf(hkey_handle,
2124                                         NULL, "MHKM", "vdd", i + 1,
2125                                         !!(mask & (1 << i)))) {
2126                                 rc = -EIO;
2127                                 break;
2128                         }
2129                 }
2130         }
2131
2132         /*
2133          * We *must* make an inconditional call to hotkey_mask_get to
2134          * refresh hotkey_acpi_mask and update hotkey_user_mask
2135          *
2136          * Take the opportunity to also log when we cannot _enable_
2137          * a given event.
2138          */
2139         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2140                 pr_notice("asked for hotkey mask 0x%08x, but "
2141                           "firmware forced it to 0x%08x\n",
2142                           fwmask, hotkey_acpi_mask);
2143         }
2144
2145         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2146                 hotkey_mask_warn_incomplete_mask();
2147
2148         return rc;
2149 }
2150
2151 /*
2152  * Sets hotkey_user_mask and tries to set the firmware mask
2153  *
2154  * Call with hotkey_mutex held
2155  */
2156 static int hotkey_user_mask_set(const u32 mask)
2157 {
2158         int rc;
2159
2160         /* Give people a chance to notice they are doing something that
2161          * is bound to go boom on their users sooner or later */
2162         if (!tp_warned.hotkey_mask_ff &&
2163             (mask == 0xffff || mask == 0xffffff ||
2164              mask == 0xffffffff)) {
2165                 tp_warned.hotkey_mask_ff = 1;
2166                 pr_notice("setting the hotkey mask to 0x%08x is likely "
2167                           "not the best way to go about it\n", mask);
2168                 pr_notice("please consider using the driver defaults, "
2169                           "and refer to up-to-date thinkpad-acpi "
2170                           "documentation\n");
2171         }
2172
2173         /* Try to enable what the user asked for, plus whatever we need.
2174          * this syncs everything but won't enable bits in hotkey_user_mask */
2175         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2176
2177         /* Enable the available bits in hotkey_user_mask */
2178         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2179
2180         return rc;
2181 }
2182
2183 /*
2184  * Sets the driver hotkey mask.
2185  *
2186  * Can be called even if the hotkey subdriver is inactive
2187  */
2188 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2189 {
2190         int rc;
2191
2192         /* Do the right thing if hotkey_init has not been called yet */
2193         if (!tp_features.hotkey) {
2194                 hotkey_driver_mask = mask;
2195                 return 0;
2196         }
2197
2198         mutex_lock(&hotkey_mutex);
2199
2200         HOTKEY_CONFIG_CRITICAL_START
2201         hotkey_driver_mask = mask;
2202 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2203         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2204 #endif
2205         HOTKEY_CONFIG_CRITICAL_END
2206
2207         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2208                                                         ~hotkey_source_mask);
2209         hotkey_poll_setup(true);
2210
2211         mutex_unlock(&hotkey_mutex);
2212
2213         return rc;
2214 }
2215
2216 static int hotkey_status_get(int *status)
2217 {
2218         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2219                 return -EIO;
2220
2221         return 0;
2222 }
2223
2224 static int hotkey_status_set(bool enable)
2225 {
2226         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2227                 return -EIO;
2228
2229         return 0;
2230 }
2231
2232 static void tpacpi_input_send_tabletsw(void)
2233 {
2234         int state;
2235
2236         if (tp_features.hotkey_tablet &&
2237             !hotkey_get_tablet_mode(&state)) {
2238                 mutex_lock(&tpacpi_inputdev_send_mutex);
2239
2240                 input_report_switch(tpacpi_inputdev,
2241                                     SW_TABLET_MODE, !!state);
2242                 input_sync(tpacpi_inputdev);
2243
2244                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2245         }
2246 }
2247
2248 /* Do NOT call without validating scancode first */
2249 static void tpacpi_input_send_key(const unsigned int scancode)
2250 {
2251         const unsigned int keycode = hotkey_keycode_map[scancode];
2252
2253         if (keycode != KEY_RESERVED) {
2254                 mutex_lock(&tpacpi_inputdev_send_mutex);
2255
2256                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2257                 input_report_key(tpacpi_inputdev, keycode, 1);
2258                 input_sync(tpacpi_inputdev);
2259
2260                 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2261                 input_report_key(tpacpi_inputdev, keycode, 0);
2262                 input_sync(tpacpi_inputdev);
2263
2264                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2265         }
2266 }
2267
2268 /* Do NOT call without validating scancode first */
2269 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2270 {
2271         hotkey_driver_event(scancode);
2272         if (hotkey_user_mask & (1 << scancode))
2273                 tpacpi_input_send_key(scancode);
2274 }
2275
2276 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2277 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2278
2279 /* Do NOT call without validating scancode first */
2280 static void tpacpi_hotkey_send_key(unsigned int scancode)
2281 {
2282         tpacpi_input_send_key_masked(scancode);
2283 }
2284
2285 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2286 {
2287         u8 d;
2288
2289         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2290                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2291                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2292                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2293                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2294                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2295         }
2296         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2297                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2298                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2299         }
2300         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2301                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2302                 n->displayexp_toggle =
2303                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2304         }
2305         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2306                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2307                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2308                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2309                 n->brightness_toggle =
2310                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2311         }
2312         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2313                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2314                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2315                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2316                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2317                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2318         }
2319 }
2320
2321 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2322                                            struct tp_nvram_state *newn,
2323                                            const u32 event_mask)
2324 {
2325
2326 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2327         do { \
2328                 if ((event_mask & (1 << __scancode)) && \
2329                     oldn->__member != newn->__member) \
2330                         tpacpi_hotkey_send_key(__scancode); \
2331         } while (0)
2332
2333 #define TPACPI_MAY_SEND_KEY(__scancode) \
2334         do { \
2335                 if (event_mask & (1 << __scancode)) \
2336                         tpacpi_hotkey_send_key(__scancode); \
2337         } while (0)
2338
2339         void issue_volchange(const unsigned int oldvol,
2340                              const unsigned int newvol)
2341         {
2342                 unsigned int i = oldvol;
2343
2344                 while (i > newvol) {
2345                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2346                         i--;
2347                 }
2348                 while (i < newvol) {
2349                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2350                         i++;
2351                 }
2352         }
2353
2354         void issue_brightnesschange(const unsigned int oldbrt,
2355                                     const unsigned int newbrt)
2356         {
2357                 unsigned int i = oldbrt;
2358
2359                 while (i > newbrt) {
2360                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2361                         i--;
2362                 }
2363                 while (i < newbrt) {
2364                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2365                         i++;
2366                 }
2367         }
2368
2369         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2370         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2371         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2372         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2373
2374         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2375
2376         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2377
2378         /*
2379          * Handle volume
2380          *
2381          * This code is supposed to duplicate the IBM firmware behaviour:
2382          * - Pressing MUTE issues mute hotkey message, even when already mute
2383          * - Pressing Volume up/down issues volume up/down hotkey messages,
2384          *   even when already at maximum or minimum volume
2385          * - The act of unmuting issues volume up/down notification,
2386          *   depending which key was used to unmute
2387          *
2388          * We are constrained to what the NVRAM can tell us, which is not much
2389          * and certainly not enough if more than one volume hotkey was pressed
2390          * since the last poll cycle.
2391          *
2392          * Just to make our life interesting, some newer Lenovo ThinkPads have
2393          * bugs in the BIOS and may fail to update volume_toggle properly.
2394          */
2395         if (newn->mute) {
2396                 /* muted */
2397                 if (!oldn->mute ||
2398                     oldn->volume_toggle != newn->volume_toggle ||
2399                     oldn->volume_level != newn->volume_level) {
2400                         /* recently muted, or repeated mute keypress, or
2401                          * multiple presses ending in mute */
2402                         issue_volchange(oldn->volume_level, newn->volume_level);
2403                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2404                 }
2405         } else {
2406                 /* unmute */
2407                 if (oldn->mute) {
2408                         /* recently unmuted, issue 'unmute' keypress */
2409                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2410                 }
2411                 if (oldn->volume_level != newn->volume_level) {
2412                         issue_volchange(oldn->volume_level, newn->volume_level);
2413                 } else if (oldn->volume_toggle != newn->volume_toggle) {
2414                         /* repeated vol up/down keypress at end of scale ? */
2415                         if (newn->volume_level == 0)
2416                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2417                         else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2418                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2419                 }
2420         }
2421
2422         /* handle brightness */
2423         if (oldn->brightness_level != newn->brightness_level) {
2424                 issue_brightnesschange(oldn->brightness_level,
2425                                        newn->brightness_level);
2426         } else if (oldn->brightness_toggle != newn->brightness_toggle) {
2427                 /* repeated key presses that didn't change state */
2428                 if (newn->brightness_level == 0)
2429                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2430                 else if (newn->brightness_level >= bright_maxlvl
2431                                 && !tp_features.bright_unkfw)
2432                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2433         }
2434
2435 #undef TPACPI_COMPARE_KEY
2436 #undef TPACPI_MAY_SEND_KEY
2437 }
2438
2439 /*
2440  * Polling driver
2441  *
2442  * We track all events in hotkey_source_mask all the time, since
2443  * most of them are edge-based.  We only issue those requested by
2444  * hotkey_user_mask or hotkey_driver_mask, though.
2445  */
2446 static int hotkey_kthread(void *data)
2447 {
2448         struct tp_nvram_state s[2];
2449         u32 poll_mask, event_mask;
2450         unsigned int si, so;
2451         unsigned long t;
2452         unsigned int change_detector;
2453         unsigned int poll_freq;
2454         bool was_frozen;
2455
2456         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2457                 goto exit;
2458
2459         set_freezable();
2460
2461         so = 0;
2462         si = 1;
2463         t = 0;
2464
2465         /* Initial state for compares */
2466         mutex_lock(&hotkey_thread_data_mutex);
2467         change_detector = hotkey_config_change;
2468         poll_mask = hotkey_source_mask;
2469         event_mask = hotkey_source_mask &
2470                         (hotkey_driver_mask | hotkey_user_mask);
2471         poll_freq = hotkey_poll_freq;
2472         mutex_unlock(&hotkey_thread_data_mutex);
2473         hotkey_read_nvram(&s[so], poll_mask);
2474
2475         while (!kthread_should_stop()) {
2476                 if (t == 0) {
2477                         if (likely(poll_freq))
2478                                 t = 1000/poll_freq;
2479                         else
2480                                 t = 100;        /* should never happen... */
2481                 }
2482                 t = msleep_interruptible(t);
2483                 if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2484                         break;
2485
2486                 if (t > 0 && !was_frozen)
2487                         continue;
2488
2489                 mutex_lock(&hotkey_thread_data_mutex);
2490                 if (was_frozen || hotkey_config_change != change_detector) {
2491                         /* forget old state on thaw or config change */
2492                         si = so;
2493                         t = 0;
2494                         change_detector = hotkey_config_change;
2495                 }
2496                 poll_mask = hotkey_source_mask;
2497                 event_mask = hotkey_source_mask &
2498                                 (hotkey_driver_mask | hotkey_user_mask);
2499                 poll_freq = hotkey_poll_freq;
2500                 mutex_unlock(&hotkey_thread_data_mutex);
2501
2502                 if (likely(poll_mask)) {
2503                         hotkey_read_nvram(&s[si], poll_mask);
2504                         if (likely(si != so)) {
2505                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2506                                                                 event_mask);
2507                         }
2508                 }
2509
2510                 so = si;
2511                 si ^= 1;
2512         }
2513
2514 exit:
2515         return 0;
2516 }
2517
2518 /* call with hotkey_mutex held */
2519 static void hotkey_poll_stop_sync(void)
2520 {
2521         if (tpacpi_hotkey_task) {
2522                 kthread_stop(tpacpi_hotkey_task);
2523                 tpacpi_hotkey_task = NULL;
2524         }
2525 }
2526
2527 /* call with hotkey_mutex held */
2528 static void hotkey_poll_setup(const bool may_warn)
2529 {
2530         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2531         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2532
2533         if (hotkey_poll_freq > 0 &&
2534             (poll_driver_mask ||
2535              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2536                 if (!tpacpi_hotkey_task) {
2537                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2538                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2539                         if (IS_ERR(tpacpi_hotkey_task)) {
2540                                 tpacpi_hotkey_task = NULL;
2541                                 pr_err("could not create kernel thread "
2542                                        "for hotkey polling\n");
2543                         }
2544                 }
2545         } else {
2546                 hotkey_poll_stop_sync();
2547                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2548                     hotkey_poll_freq == 0) {
2549                         pr_notice("hot keys 0x%08x and/or events 0x%08x "
2550                                   "require polling, which is currently "
2551                                   "disabled\n",
2552                                   poll_user_mask, poll_driver_mask);
2553                 }
2554         }
2555 }
2556
2557 static void hotkey_poll_setup_safe(const bool may_warn)
2558 {
2559         mutex_lock(&hotkey_mutex);
2560         hotkey_poll_setup(may_warn);
2561         mutex_unlock(&hotkey_mutex);
2562 }
2563
2564 /* call with hotkey_mutex held */
2565 static void hotkey_poll_set_freq(unsigned int freq)
2566 {
2567         if (!freq)
2568                 hotkey_poll_stop_sync();
2569
2570         hotkey_poll_freq = freq;
2571 }
2572
2573 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2574
2575 static void hotkey_poll_setup(const bool __unused)
2576 {
2577 }
2578
2579 static void hotkey_poll_setup_safe(const bool __unused)
2580 {
2581 }
2582
2583 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2584
2585 static int hotkey_inputdev_open(struct input_dev *dev)
2586 {
2587         switch (tpacpi_lifecycle) {
2588         case TPACPI_LIFE_INIT:
2589         case TPACPI_LIFE_RUNNING:
2590                 hotkey_poll_setup_safe(false);
2591                 return 0;
2592         case TPACPI_LIFE_EXITING:
2593                 return -EBUSY;
2594         }
2595
2596         /* Should only happen if tpacpi_lifecycle is corrupt */
2597         BUG();
2598         return -EBUSY;
2599 }
2600
2601 static void hotkey_inputdev_close(struct input_dev *dev)
2602 {
2603         /* disable hotkey polling when possible */
2604         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2605             !(hotkey_source_mask & hotkey_driver_mask))
2606                 hotkey_poll_setup_safe(false);
2607 }
2608
2609 /* sysfs hotkey enable ------------------------------------------------- */
2610 static ssize_t hotkey_enable_show(struct device *dev,
2611                            struct device_attribute *attr,
2612                            char *buf)
2613 {
2614         int res, status;
2615
2616         printk_deprecated_attribute("hotkey_enable",
2617                         "Hotkey reporting is always enabled");
2618
2619         res = hotkey_status_get(&status);
2620         if (res)
2621                 return res;
2622
2623         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2624 }
2625
2626 static ssize_t hotkey_enable_store(struct device *dev,
2627                             struct device_attribute *attr,
2628                             const char *buf, size_t count)
2629 {
2630         unsigned long t;
2631
2632         printk_deprecated_attribute("hotkey_enable",
2633                         "Hotkeys can be disabled through hotkey_mask");
2634
2635         if (parse_strtoul(buf, 1, &t))
2636                 return -EINVAL;
2637
2638         if (t == 0)
2639                 return -EPERM;
2640
2641         return count;
2642 }
2643
2644 static struct device_attribute dev_attr_hotkey_enable =
2645         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2646                 hotkey_enable_show, hotkey_enable_store);
2647
2648 /* sysfs hotkey mask --------------------------------------------------- */
2649 static ssize_t hotkey_mask_show(struct device *dev,
2650                            struct device_attribute *attr,
2651                            char *buf)
2652 {
2653         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2654 }
2655
2656 static ssize_t hotkey_mask_store(struct device *dev,
2657                             struct device_attribute *attr,
2658                             const char *buf, size_t count)
2659 {
2660         unsigned long t;
2661         int res;
2662
2663         if (parse_strtoul(buf, 0xffffffffUL, &t))
2664                 return -EINVAL;
2665
2666         if (mutex_lock_killable(&hotkey_mutex))
2667                 return -ERESTARTSYS;
2668
2669         res = hotkey_user_mask_set(t);
2670
2671 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2672         hotkey_poll_setup(true);
2673 #endif
2674
2675         mutex_unlock(&hotkey_mutex);
2676
2677         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2678
2679         return (res) ? res : count;
2680 }
2681
2682 static struct device_attribute dev_attr_hotkey_mask =
2683         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2684                 hotkey_mask_show, hotkey_mask_store);
2685
2686 /* sysfs hotkey bios_enabled ------------------------------------------- */
2687 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2688                            struct device_attribute *attr,
2689                            char *buf)
2690 {
2691         return sprintf(buf, "0\n");
2692 }
2693
2694 static struct device_attribute dev_attr_hotkey_bios_enabled =
2695         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2696
2697 /* sysfs hotkey bios_mask ---------------------------------------------- */
2698 static ssize_t hotkey_bios_mask_show(struct device *dev,
2699                            struct device_attribute *attr,
2700                            char *buf)
2701 {
2702         printk_deprecated_attribute("hotkey_bios_mask",
2703                         "This attribute is useless.");
2704         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2705 }
2706
2707 static struct device_attribute dev_attr_hotkey_bios_mask =
2708         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2709
2710 /* sysfs hotkey all_mask ----------------------------------------------- */
2711 static ssize_t hotkey_all_mask_show(struct device *dev,
2712                            struct device_attribute *attr,
2713                            char *buf)
2714 {
2715         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2716                                 hotkey_all_mask | hotkey_source_mask);
2717 }
2718
2719 static struct device_attribute dev_attr_hotkey_all_mask =
2720         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2721
2722 /* sysfs hotkey recommended_mask --------------------------------------- */
2723 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2724                                             struct device_attribute *attr,
2725                                             char *buf)
2726 {
2727         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2728                         (hotkey_all_mask | hotkey_source_mask)
2729                         & ~hotkey_reserved_mask);
2730 }
2731
2732 static struct device_attribute dev_attr_hotkey_recommended_mask =
2733         __ATTR(hotkey_recommended_mask, S_IRUGO,
2734                 hotkey_recommended_mask_show, NULL);
2735
2736 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2737
2738 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2739 static ssize_t hotkey_source_mask_show(struct device *dev,
2740                            struct device_attribute *attr,
2741                            char *buf)
2742 {
2743         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2744 }
2745
2746 static ssize_t hotkey_source_mask_store(struct device *dev,
2747                             struct device_attribute *attr,
2748                             const char *buf, size_t count)
2749 {
2750         unsigned long t;
2751         u32 r_ev;
2752         int rc;
2753
2754         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2755                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2756                 return -EINVAL;
2757
2758         if (mutex_lock_killable(&hotkey_mutex))
2759                 return -ERESTARTSYS;
2760
2761         HOTKEY_CONFIG_CRITICAL_START
2762         hotkey_source_mask = t;
2763         HOTKEY_CONFIG_CRITICAL_END
2764
2765         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2766                         ~hotkey_source_mask);
2767         hotkey_poll_setup(true);
2768
2769         /* check if events needed by the driver got disabled */
2770         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2771                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2772
2773         mutex_unlock(&hotkey_mutex);
2774
2775         if (rc < 0)
2776                 pr_err("hotkey_source_mask: "
2777                        "failed to update the firmware event mask!\n");
2778
2779         if (r_ev)
2780                 pr_notice("hotkey_source_mask: "
2781                           "some important events were disabled: 0x%04x\n",
2782                           r_ev);
2783
2784         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2785
2786         return (rc < 0) ? rc : count;
2787 }
2788
2789 static struct device_attribute dev_attr_hotkey_source_mask =
2790         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2791                 hotkey_source_mask_show, hotkey_source_mask_store);
2792
2793 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2794 static ssize_t hotkey_poll_freq_show(struct device *dev,
2795                            struct device_attribute *attr,
2796                            char *buf)
2797 {
2798         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2799 }
2800
2801 static ssize_t hotkey_poll_freq_store(struct device *dev,
2802                             struct device_attribute *attr,
2803                             const char *buf, size_t count)
2804 {
2805         unsigned long t;
2806
2807         if (parse_strtoul(buf, 25, &t))
2808                 return -EINVAL;
2809
2810         if (mutex_lock_killable(&hotkey_mutex))
2811                 return -ERESTARTSYS;
2812
2813         hotkey_poll_set_freq(t);
2814         hotkey_poll_setup(true);
2815
2816         mutex_unlock(&hotkey_mutex);
2817
2818         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2819
2820         return count;
2821 }
2822
2823 static struct device_attribute dev_attr_hotkey_poll_freq =
2824         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2825                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2826
2827 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2828
2829 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2830 static ssize_t hotkey_radio_sw_show(struct device *dev,
2831                            struct device_attribute *attr,
2832                            char *buf)
2833 {
2834         int res;
2835         res = hotkey_get_wlsw();
2836         if (res < 0)
2837                 return res;
2838
2839         /* Opportunistic update */
2840         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2841
2842         return snprintf(buf, PAGE_SIZE, "%d\n",
2843                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2844 }
2845
2846 static struct device_attribute dev_attr_hotkey_radio_sw =
2847         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2848
2849 static void hotkey_radio_sw_notify_change(void)
2850 {
2851         if (tp_features.hotkey_wlsw)
2852                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2853                              "hotkey_radio_sw");
2854 }
2855
2856 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2857 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2858                            struct device_attribute *attr,
2859                            char *buf)
2860 {
2861         int res, s;
2862         res = hotkey_get_tablet_mode(&s);
2863         if (res < 0)
2864                 return res;
2865
2866         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2867 }
2868
2869 static struct device_attribute dev_attr_hotkey_tablet_mode =
2870         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2871
2872 static void hotkey_tablet_mode_notify_change(void)
2873 {
2874         if (tp_features.hotkey_tablet)
2875                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2876                              "hotkey_tablet_mode");
2877 }
2878
2879 /* sysfs wakeup reason (pollable) -------------------------------------- */
2880 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2881                            struct device_attribute *attr,
2882                            char *buf)
2883 {
2884         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2885 }
2886
2887 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2888         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2889
2890 static void hotkey_wakeup_reason_notify_change(void)
2891 {
2892         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2893                      "wakeup_reason");
2894 }
2895
2896 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2897 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2898                            struct device_attribute *attr,
2899                            char *buf)
2900 {
2901         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2902 }
2903
2904 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2905         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2906                hotkey_wakeup_hotunplug_complete_show, NULL);
2907
2908 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2909 {
2910         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2911                      "wakeup_hotunplug_complete");
2912 }
2913
2914 /* --------------------------------------------------------------------- */
2915
2916 static struct attribute *hotkey_attributes[] __initdata = {
2917         &dev_attr_hotkey_enable.attr,
2918         &dev_attr_hotkey_bios_enabled.attr,
2919         &dev_attr_hotkey_bios_mask.attr,
2920         &dev_attr_hotkey_wakeup_reason.attr,
2921         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2922         &dev_attr_hotkey_mask.attr,
2923         &dev_attr_hotkey_all_mask.attr,
2924         &dev_attr_hotkey_recommended_mask.attr,
2925 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2926         &dev_attr_hotkey_source_mask.attr,
2927         &dev_attr_hotkey_poll_freq.attr,
2928 #endif
2929 };
2930
2931 /*
2932  * Sync both the hw and sw blocking state of all switches
2933  */
2934 static void tpacpi_send_radiosw_update(void)
2935 {
2936         int wlsw;
2937
2938         /*
2939          * We must sync all rfkill controllers *before* issuing any
2940          * rfkill input events, or we will race the rfkill core input
2941          * handler.
2942          *
2943          * tpacpi_inputdev_send_mutex works as a synchronization point
2944          * for the above.
2945          *
2946          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2947          */
2948
2949         wlsw = hotkey_get_wlsw();
2950
2951         /* Sync hw blocking state first if it is hw-blocked */
2952         if (wlsw == TPACPI_RFK_RADIO_OFF)
2953                 tpacpi_rfk_update_hwblock_state(true);
2954
2955         /* Sync sw blocking state */
2956         tpacpi_rfk_update_swstate_all();
2957
2958         /* Sync hw blocking state last if it is hw-unblocked */
2959         if (wlsw == TPACPI_RFK_RADIO_ON)
2960                 tpacpi_rfk_update_hwblock_state(false);
2961
2962         /* Issue rfkill input event for WLSW switch */
2963         if (!(wlsw < 0)) {
2964                 mutex_lock(&tpacpi_inputdev_send_mutex);
2965
2966                 input_report_switch(tpacpi_inputdev,
2967                                     SW_RFKILL_ALL, (wlsw > 0));
2968                 input_sync(tpacpi_inputdev);
2969
2970                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2971         }
2972
2973         /*
2974          * this can be unconditional, as we will poll state again
2975          * if userspace uses the notify to read data
2976          */
2977         hotkey_radio_sw_notify_change();
2978 }
2979
2980 static void hotkey_exit(void)
2981 {
2982 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2983         mutex_lock(&hotkey_mutex);
2984         hotkey_poll_stop_sync();
2985         mutex_unlock(&hotkey_mutex);
2986 #endif
2987
2988         if (hotkey_dev_attributes)
2989                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2990
2991         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2992                    "restoring original HKEY status and mask\n");
2993         /* yes, there is a bitwise or below, we want the
2994          * functions to be called even if one of them fail */
2995         if (((tp_features.hotkey_mask &&
2996               hotkey_mask_set(hotkey_orig_mask)) |
2997              hotkey_status_set(false)) != 0)
2998                 pr_err("failed to restore hot key mask "
2999                        "to BIOS defaults\n");
3000 }
3001
3002 static void __init hotkey_unmap(const unsigned int scancode)
3003 {
3004         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3005                 clear_bit(hotkey_keycode_map[scancode],
3006                           tpacpi_inputdev->keybit);
3007                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3008         }
3009 }
3010
3011 /*
3012  * HKEY quirks:
3013  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3014  */
3015
3016 #define TPACPI_HK_Q_INIMASK     0x0001
3017
3018 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3019         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3020         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3021         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3022         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3023         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3024         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3025         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3026         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3027         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3028         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3029         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3030         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3031         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3032         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3033         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3034         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3035         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3036         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3037         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3038 };
3039
3040 typedef u16 tpacpi_keymap_entry_t;
3041 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3042
3043 static int __init hotkey_init(struct ibm_init_struct *iibm)
3044 {
3045         /* Requirements for changing the default keymaps:
3046          *
3047          * 1. Many of the keys are mapped to KEY_RESERVED for very
3048          *    good reasons.  Do not change them unless you have deep
3049          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3050          *    the various ThinkPad models.  The driver behaves
3051          *    differently for KEY_RESERVED: such keys have their
3052          *    hot key mask *unset* in mask_recommended, and also
3053          *    in the initial hot key mask programmed into the
3054          *    firmware at driver load time, which means the firm-
3055          *    ware may react very differently if you change them to
3056          *    something else;
3057          *
3058          * 2. You must be subscribed to the linux-thinkpad and
3059          *    ibm-acpi-devel mailing lists, and you should read the
3060          *    list archives since 2007 if you want to change the
3061          *    keymaps.  This requirement exists so that you will
3062          *    know the past history of problems with the thinkpad-
3063          *    acpi driver keymaps, and also that you will be
3064          *    listening to any bug reports;
3065          *
3066          * 3. Do not send thinkpad-acpi specific patches directly to
3067          *    for merging, *ever*.  Send them to the linux-acpi
3068          *    mailinglist for comments.  Merging is to be done only
3069          *    through acpi-test and the ACPI maintainer.
3070          *
3071          * If the above is too much to ask, don't change the keymap.
3072          * Ask the thinkpad-acpi maintainer to do it, instead.
3073          */
3074
3075         enum keymap_index {
3076                 TPACPI_KEYMAP_IBM_GENERIC = 0,
3077                 TPACPI_KEYMAP_LENOVO_GENERIC,
3078         };
3079
3080         static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3081         /* Generic keymap for IBM ThinkPads */
3082         [TPACPI_KEYMAP_IBM_GENERIC] = {
3083                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3084                 KEY_FN_F1,      KEY_BATTERY,    KEY_COFFEE,     KEY_SLEEP,
3085                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3086                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3087
3088                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3089                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3090                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3091                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3092
3093                 /* brightness: firmware always reacts to them */
3094                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3095                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3096
3097                 /* Thinklight: firmware always react to it */
3098                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3099
3100                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3101                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3102
3103                 /* Volume: firmware always react to it and reprograms
3104                  * the built-in *extra* mixer.  Never map it to control
3105                  * another mixer by default. */
3106                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3107                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3108                 KEY_RESERVED,   /* 0x16: MUTE */
3109
3110                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3111
3112                 /* (assignments unknown, please report if found) */
3113                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3114                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3115                 },
3116
3117         /* Generic keymap for Lenovo ThinkPads */
3118         [TPACPI_KEYMAP_LENOVO_GENERIC] = {
3119                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3120                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3121                 KEY_WLAN,       KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3122                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3123
3124                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3125                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3126                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3127                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3128
3129                 /* These should be enabled --only-- when ACPI video
3130                  * is disabled (i.e. in "vendor" mode), and are handled
3131                  * in a special way by the init code */
3132                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3133                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3134
3135                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3136
3137                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3138                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3139
3140                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3141                  * react to it and reprograms the built-in *extra* mixer.
3142                  * Never map it to control another mixer by default.
3143                  *
3144                  * T60?, T61, R60?, R61: firmware and EC tries to send
3145                  * these over the regular keyboard, so these are no-ops,
3146                  * but there are still weird bugs re. MUTE, so do not
3147                  * change unless you get test reports from all Lenovo
3148                  * models.  May cause the BIOS to interfere with the
3149                  * HDA mixer.
3150                  */
3151                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3152                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3153                 KEY_RESERVED,   /* 0x16: MUTE */
3154
3155                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3156
3157                 /* (assignments unknown, please report if found) */
3158                 KEY_UNKNOWN, KEY_UNKNOWN,
3159
3160                 /*
3161                  * The mic mute button only sends 0x1a.  It does not
3162                  * automatically mute the mic or change the mute light.
3163                  */
3164                 KEY_MICMUTE,    /* 0x1a: Mic mute (since ?400 or so) */
3165
3166                 /* (assignments unknown, please report if found) */
3167                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3168                 KEY_UNKNOWN,
3169                 },
3170         };
3171
3172         static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3173                 /* Generic maps (fallback) */
3174                 {
3175                   .vendor = PCI_VENDOR_ID_IBM,
3176                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3177                   .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3178                 },
3179                 {
3180                   .vendor = PCI_VENDOR_ID_LENOVO,
3181                   .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3182                   .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3183                 },
3184         };
3185
3186 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(tpacpi_keymap_t)
3187 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(tpacpi_keymap_entry_t)
3188
3189         int res, i;
3190         int status;
3191         int hkeyv;
3192         bool radiosw_state  = false;
3193         bool tabletsw_state = false;
3194
3195         unsigned long quirks;
3196         unsigned long keymap_id;
3197
3198         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3199                         "initializing hotkey subdriver\n");
3200
3201         BUG_ON(!tpacpi_inputdev);
3202         BUG_ON(tpacpi_inputdev->open != NULL ||
3203                tpacpi_inputdev->close != NULL);
3204
3205         TPACPI_ACPIHANDLE_INIT(hkey);
3206         mutex_init(&hotkey_mutex);
3207
3208 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3209         mutex_init(&hotkey_thread_data_mutex);
3210 #endif
3211
3212         /* hotkey not supported on 570 */
3213         tp_features.hotkey = hkey_handle != NULL;
3214
3215         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3216                 "hotkeys are %s\n",
3217                 str_supported(tp_features.hotkey));
3218
3219         if (!tp_features.hotkey)
3220                 return 1;
3221
3222         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3223                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3224
3225         tpacpi_disable_brightness_delay();
3226
3227         /* MUST have enough space for all attributes to be added to
3228          * hotkey_dev_attributes */
3229         hotkey_dev_attributes = create_attr_set(
3230                                         ARRAY_SIZE(hotkey_attributes) + 2,
3231                                         NULL);
3232         if (!hotkey_dev_attributes)
3233                 return -ENOMEM;
3234         res = add_many_to_attr_set(hotkey_dev_attributes,
3235                         hotkey_attributes,
3236                         ARRAY_SIZE(hotkey_attributes));
3237         if (res)
3238                 goto err_exit;
3239
3240         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3241            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3242            for HKEY interface version 0x100 */
3243         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3244                 if ((hkeyv >> 8) != 1) {
3245                         pr_err("unknown version of the HKEY interface: 0x%x\n",
3246                                hkeyv);
3247                         pr_err("please report this to %s\n", TPACPI_MAIL);
3248                 } else {
3249                         /*
3250                          * MHKV 0x100 in A31, R40, R40e,
3251                          * T4x, X31, and later
3252                          */
3253                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3254                                 "firmware HKEY interface version: 0x%x\n",
3255                                 hkeyv);
3256
3257                         /* Paranoia check AND init hotkey_all_mask */
3258                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3259                                         "MHKA", "qd")) {
3260                                 pr_err("missing MHKA handler, "
3261                                        "please report this to %s\n",
3262                                        TPACPI_MAIL);
3263                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3264                                 hotkey_all_mask = 0x080cU;
3265                         } else {
3266                                 tp_features.hotkey_mask = 1;
3267                         }
3268                 }
3269         }
3270
3271         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3272                 "hotkey masks are %s\n",
3273                 str_supported(tp_features.hotkey_mask));
3274
3275         /* Init hotkey_all_mask if not initialized yet */
3276         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3277             (quirks & TPACPI_HK_Q_INIMASK))
3278                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3279
3280         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3281         if (tp_features.hotkey_mask) {
3282                 /* hotkey_source_mask *must* be zero for
3283                  * the first hotkey_mask_get to return hotkey_orig_mask */
3284                 res = hotkey_mask_get();
3285                 if (res)
3286                         goto err_exit;
3287
3288                 hotkey_orig_mask = hotkey_acpi_mask;
3289         } else {
3290                 hotkey_orig_mask = hotkey_all_mask;
3291                 hotkey_acpi_mask = hotkey_all_mask;
3292         }
3293
3294 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3295         if (dbg_wlswemul) {
3296                 tp_features.hotkey_wlsw = 1;
3297                 radiosw_state = !!tpacpi_wlsw_emulstate;
3298                 pr_info("radio switch emulation enabled\n");
3299         } else
3300 #endif
3301         /* Not all thinkpads have a hardware radio switch */
3302         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3303                 tp_features.hotkey_wlsw = 1;
3304                 radiosw_state = !!status;
3305                 pr_info("radio switch found; radios are %s\n",
3306                         enabled(status, 0));
3307         }
3308         if (tp_features.hotkey_wlsw)
3309                 res = add_to_attr_set(hotkey_dev_attributes,
3310                                 &dev_attr_hotkey_radio_sw.attr);
3311
3312         /* For X41t, X60t, X61t Tablets... */
3313         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3314                 tp_features.hotkey_tablet = 1;
3315                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3316                 pr_info("possible tablet mode switch found; "
3317                         "ThinkPad in %s mode\n",
3318                         (tabletsw_state) ? "tablet" : "laptop");
3319                 res = add_to_attr_set(hotkey_dev_attributes,
3320                                 &dev_attr_hotkey_tablet_mode.attr);
3321         }
3322
3323         if (!res)
3324                 res = register_attr_set_with_sysfs(
3325                                 hotkey_dev_attributes,
3326                                 &tpacpi_pdev->dev.kobj);
3327         if (res)
3328                 goto err_exit;
3329
3330         /* Set up key map */
3331         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3332                                         GFP_KERNEL);
3333         if (!hotkey_keycode_map) {
3334                 pr_err("failed to allocate memory for key map\n");
3335                 res = -ENOMEM;
3336                 goto err_exit;
3337         }
3338
3339         keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3340                                         ARRAY_SIZE(tpacpi_keymap_qtable));
3341         BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3342         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3343                    "using keymap number %lu\n", keymap_id);
3344
3345         memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id],
3346                 TPACPI_HOTKEY_MAP_SIZE);
3347
3348         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3349         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3350         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3351         tpacpi_inputdev->keycode = hotkey_keycode_map;
3352         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3353                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3354                         input_set_capability(tpacpi_inputdev, EV_KEY,
3355                                                 hotkey_keycode_map[i]);
3356                 } else {
3357                         if (i < sizeof(hotkey_reserved_mask)*8)
3358                                 hotkey_reserved_mask |= 1 << i;
3359                 }
3360         }
3361
3362         if (tp_features.hotkey_wlsw) {
3363                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3364                 input_report_switch(tpacpi_inputdev,
3365                                     SW_RFKILL_ALL, radiosw_state);
3366         }
3367         if (tp_features.hotkey_tablet) {
3368                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3369                 input_report_switch(tpacpi_inputdev,
3370                                     SW_TABLET_MODE, tabletsw_state);
3371         }
3372
3373         /* Do not issue duplicate brightness change events to
3374          * userspace. tpacpi_detect_brightness_capabilities() must have
3375          * been called before this point  */
3376         if (acpi_video_backlight_support()) {
3377                 pr_info("This ThinkPad has standard ACPI backlight "
3378                         "brightness control, supported by the ACPI "
3379                         "video driver\n");
3380                 pr_notice("Disabling thinkpad-acpi brightness events "
3381                           "by default...\n");
3382
3383                 /* Disable brightness up/down on Lenovo thinkpads when
3384                  * ACPI is handling them, otherwise it is plain impossible
3385                  * for userspace to do something even remotely sane */
3386                 hotkey_reserved_mask |=
3387                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3388                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3389                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3390                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3391         }
3392
3393 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3394         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3395                                 & ~hotkey_all_mask
3396                                 & ~hotkey_reserved_mask;
3397
3398         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3399                     "hotkey source mask 0x%08x, polling freq %u\n",
3400                     hotkey_source_mask, hotkey_poll_freq);
3401 #endif
3402
3403         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3404                         "enabling firmware HKEY event interface...\n");
3405         res = hotkey_status_set(true);
3406         if (res) {
3407                 hotkey_exit();
3408                 return res;
3409         }
3410         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3411                                | hotkey_driver_mask)
3412                               & ~hotkey_source_mask);
3413         if (res < 0 && res != -ENXIO) {
3414                 hotkey_exit();
3415                 return res;
3416         }
3417         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3418                                 & ~hotkey_reserved_mask;
3419         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3420                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3421                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3422
3423         tpacpi_inputdev->open = &hotkey_inputdev_open;
3424         tpacpi_inputdev->close = &hotkey_inputdev_close;
3425
3426         hotkey_poll_setup_safe(true);
3427
3428         return 0;
3429
3430 err_exit:
3431         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3432         hotkey_dev_attributes = NULL;
3433
3434         return (res < 0)? res : 1;
3435 }
3436
3437 static bool hotkey_notify_hotkey(const u32 hkey,
3438                                  bool *send_acpi_ev,
3439                                  bool *ignore_acpi_ev)
3440 {
3441         /* 0x1000-0x1FFF: key presses */
3442         unsigned int scancode = hkey & 0xfff;
3443         *send_acpi_ev = true;
3444         *ignore_acpi_ev = false;
3445
3446         /* HKEY event 0x1001 is scancode 0x00 */
3447         if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) {
3448                 scancode--;
3449                 if (!(hotkey_source_mask & (1 << scancode))) {
3450                         tpacpi_input_send_key_masked(scancode);
3451                         *send_acpi_ev = false;
3452                 } else {
3453                         *ignore_acpi_ev = true;
3454                 }
3455                 return true;
3456         }
3457         return false;
3458 }
3459
3460 static bool hotkey_notify_wakeup(const u32 hkey,
3461                                  bool *send_acpi_ev,
3462                                  bool *ignore_acpi_ev)
3463 {
3464         /* 0x2000-0x2FFF: Wakeup reason */
3465         *send_acpi_ev = true;
3466         *ignore_acpi_ev = false;
3467
3468         switch (hkey) {
3469         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3470         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3471                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3472                 *ignore_acpi_ev = true;
3473                 break;
3474
3475         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3476         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3477                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3478                 *ignore_acpi_ev = true;
3479                 break;
3480
3481         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3482         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3483                 pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3484                 /* how to auto-heal: */
3485                 /* 2313: woke up from S3, go to S4/S5 */
3486                 /* 2413: woke up from S4, go to S5 */
3487                 break;
3488
3489         default:
3490                 return false;
3491         }
3492
3493         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3494                 pr_info("woke up due to a hot-unplug request...\n");
3495                 hotkey_wakeup_reason_notify_change();
3496         }
3497         return true;
3498 }
3499
3500 static bool hotkey_notify_dockevent(const u32 hkey,
3501                                  bool *send_acpi_ev,
3502                                  bool *ignore_acpi_ev)
3503 {
3504         /* 0x4000-0x4FFF: dock-related events */
3505         *send_acpi_ev = true;
3506         *ignore_acpi_ev = false;
3507
3508         switch (hkey) {
3509         case TP_HKEY_EV_UNDOCK_ACK:
3510                 /* ACPI undock operation completed after wakeup */
3511                 hotkey_autosleep_ack = 1;
3512                 pr_info("undocked\n");
3513                 hotkey_wakeup_hotunplug_complete_notify_change();
3514                 return true;
3515
3516         case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3517                 pr_info("docked into hotplug port replicator\n");
3518                 return true;
3519         case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3520                 pr_info("undocked from hotplug port replicator\n");
3521                 return true;
3522
3523         default:
3524                 return false;
3525         }
3526 }
3527
3528 static bool hotkey_notify_usrevent(const u32 hkey,
3529                                  bool *send_acpi_ev,
3530                                  bool *ignore_acpi_ev)
3531 {
3532         /* 0x5000-0x5FFF: human interface helpers */
3533         *send_acpi_ev = true;
3534         *ignore_acpi_ev = false;
3535
3536         switch (hkey) {
3537         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3538         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3539                 return true;
3540
3541         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3542         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3543                 tpacpi_input_send_tabletsw();
3544                 hotkey_tablet_mode_notify_change();
3545                 *send_acpi_ev = false;
3546                 return true;
3547
3548         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3549         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3550         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3551                 /* do not propagate these events */
3552                 *ignore_acpi_ev = true;
3553                 return true;
3554
3555         default:
3556                 return false;
3557         }
3558 }
3559
3560 static void thermal_dump_all_sensors(void);
3561
3562 static bool hotkey_notify_6xxx(const u32 hkey,
3563                                  bool *send_acpi_ev,
3564                                  bool *ignore_acpi_ev)
3565 {
3566         bool known = true;
3567
3568         /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3569         *send_acpi_ev = true;
3570         *ignore_acpi_ev = false;
3571
3572         switch (hkey) {
3573         case TP_HKEY_EV_THM_TABLE_CHANGED:
3574                 pr_info("EC reports that Thermal Table has changed\n");
3575                 /* recommended action: do nothing, we don't have
3576                  * Lenovo ATM information */
3577                 return true;
3578         case TP_HKEY_EV_ALARM_BAT_HOT:
3579                 pr_crit("THERMAL ALARM: battery is too hot!\n");
3580                 /* recommended action: warn user through gui */
3581                 break;
3582         case TP_HKEY_EV_ALARM_BAT_XHOT:
3583                 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3584                 /* recommended action: immediate sleep/hibernate */
3585                 break;
3586         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3587                 pr_crit("THERMAL ALARM: "
3588                         "a sensor reports something is too hot!\n");
3589                 /* recommended action: warn user through gui, that */
3590                 /* some internal component is too hot */
3591                 break;
3592         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3593                 pr_alert("THERMAL EMERGENCY: "
3594                          "a sensor reports something is extremely hot!\n");
3595                 /* recommended action: immediate sleep/hibernate */
3596                 break;
3597         case TP_HKEY_EV_AC_CHANGED:
3598                 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3599                  * AC status changed; can be triggered by plugging or
3600                  * unplugging AC adapter, docking or undocking. */
3601
3602                 /* fallthrough */
3603
3604         case TP_HKEY_EV_KEY_NUMLOCK:
3605         case TP_HKEY_EV_KEY_FN:
3606                 /* key press events, we just ignore them as long as the EC
3607                  * is still reporting them in the normal keyboard stream */
3608                 *send_acpi_ev = false;
3609                 *ignore_acpi_ev = true;
3610                 return true;
3611
3612         default:
3613                 pr_warn("unknown possible thermal alarm or keyboard event received\n");
3614                 known = false;
3615         }
3616
3617         thermal_dump_all_sensors();
3618
3619         return known;
3620 }
3621
3622 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3623 {
3624         u32 hkey;
3625         bool send_acpi_ev;
3626         bool ignore_acpi_ev;
3627         bool known_ev;
3628
3629         if (event != 0x80) {
3630                 pr_err("unknown HKEY notification event %d\n", event);
3631                 /* forward it to userspace, maybe it knows how to handle it */
3632                 acpi_bus_generate_netlink_event(
3633                                         ibm->acpi->device->pnp.device_class,
3634                                         dev_name(&ibm->acpi->device->dev),
3635                                         event, 0);
3636                 return;
3637         }
3638
3639         while (1) {
3640                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3641                         pr_err("failed to retrieve HKEY event\n");
3642                         return;
3643                 }
3644
3645                 if (hkey == 0) {
3646                         /* queue empty */
3647                         return;
3648                 }
3649
3650                 send_acpi_ev = true;
3651                 ignore_acpi_ev = false;
3652
3653                 switch (hkey >> 12) {
3654                 case 1:
3655                         /* 0x1000-0x1FFF: key presses */
3656                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3657                                                  &ignore_acpi_ev);
3658                         break;
3659                 case 2:
3660                         /* 0x2000-0x2FFF: Wakeup reason */
3661                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3662                                                  &ignore_acpi_ev);
3663                         break;
3664                 case 3:
3665                         /* 0x3000-0x3FFF: bay-related wakeups */
3666                         switch (hkey) {
3667                         case TP_HKEY_EV_BAYEJ_ACK:
3668                                 hotkey_autosleep_ack = 1;
3669                                 pr_info("bay ejected\n");
3670                                 hotkey_wakeup_hotunplug_complete_notify_change();
3671                                 known_ev = true;
3672                                 break;
3673                         case TP_HKEY_EV_OPTDRV_EJ:
3674                                 /* FIXME: kick libata if SATA link offline */
3675                                 known_ev = true;
3676                                 break;
3677                         default:
3678                                 known_ev = false;
3679                         }
3680                         break;
3681                 case 4:
3682                         /* 0x4000-0x4FFF: dock-related events */
3683                         known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
3684                                                 &ignore_acpi_ev);
3685                         break;
3686                 case 5:
3687                         /* 0x5000-0x5FFF: human interface helpers */
3688                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3689                                                  &ignore_acpi_ev);
3690                         break;
3691                 case 6:
3692                         /* 0x6000-0x6FFF: thermal alarms/notices and
3693                          *                keyboard events */
3694                         known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
3695                                                  &ignore_acpi_ev);
3696                         break;
3697                 case 7:
3698                         /* 0x7000-0x7FFF: misc */
3699                         if (tp_features.hotkey_wlsw &&
3700                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3701                                 tpacpi_send_radiosw_update();
3702                                 send_acpi_ev = 0;
3703                                 known_ev = true;
3704                                 break;
3705                         }
3706                         /* fallthrough to default */
3707                 default:
3708                         known_ev = false;
3709                 }
3710                 if (!known_ev) {
3711                         pr_notice("unhandled HKEY event 0x%04x\n", hkey);
3712                         pr_notice("please report the conditions when this "
3713                                   "event happened to %s\n", TPACPI_MAIL);
3714                 }
3715
3716                 /* netlink events */
3717                 if (!ignore_acpi_ev && send_acpi_ev) {
3718                         acpi_bus_generate_netlink_event(
3719                                         ibm->acpi->device->pnp.device_class,
3720                                         dev_name(&ibm->acpi->device->dev),
3721                                         event, hkey);
3722                 }
3723         }
3724 }
3725
3726 static void hotkey_suspend(void)
3727 {
3728         /* Do these on suspend, we get the events on early resume! */
3729         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3730         hotkey_autosleep_ack = 0;
3731 }
3732
3733 static void hotkey_resume(void)
3734 {
3735         tpacpi_disable_brightness_delay();
3736
3737         if (hotkey_status_set(true) < 0 ||
3738             hotkey_mask_set(hotkey_acpi_mask) < 0)
3739                 pr_err("error while attempting to reset the event "
3740                        "firmware interface\n");
3741
3742         tpacpi_send_radiosw_update();
3743         hotkey_tablet_mode_notify_change();
3744         hotkey_wakeup_reason_notify_change();
3745         hotkey_wakeup_hotunplug_complete_notify_change();
3746         hotkey_poll_setup_safe(false);
3747 }
3748
3749 /* procfs -------------------------------------------------------------- */
3750 static int hotkey_read(struct seq_file *m)
3751 {
3752         int res, status;
3753
3754         if (!tp_features.hotkey) {
3755                 seq_printf(m, "status:\t\tnot supported\n");
3756                 return 0;
3757         }
3758
3759         if (mutex_lock_killable(&hotkey_mutex))
3760                 return -ERESTARTSYS;
3761         res = hotkey_status_get(&status);
3762         if (!res)
3763                 res = hotkey_mask_get();
3764         mutex_unlock(&hotkey_mutex);
3765         if (res)
3766                 return res;
3767
3768         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3769         if (hotkey_all_mask) {
3770                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3771                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3772         } else {
3773                 seq_printf(m, "mask:\t\tnot supported\n");
3774                 seq_printf(m, "commands:\tenable, disable, reset\n");
3775         }
3776
3777         return 0;
3778 }
3779
3780 static void hotkey_enabledisable_warn(bool enable)
3781 {
3782         tpacpi_log_usertask("procfs hotkey enable/disable");
3783         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3784                   pr_fmt("hotkey enable/disable functionality has been "
3785                          "removed from the driver.  "
3786                          "Hotkeys are always enabled.\n")))
3787                 pr_err("Please remove the hotkey=enable module "
3788                        "parameter, it is deprecated.  "
3789                        "Hotkeys are always enabled.\n");
3790 }
3791
3792 static int hotkey_write(char *buf)
3793 {
3794         int res;
3795         u32 mask;
3796         char *cmd;
3797
3798         if (!tp_features.hotkey)
3799                 return -ENODEV;
3800
3801         if (mutex_lock_killable(&hotkey_mutex))
3802                 return -ERESTARTSYS;
3803
3804         mask = hotkey_user_mask;
3805
3806         res = 0;
3807         while ((cmd = next_cmd(&buf))) {
3808                 if (strlencmp(cmd, "enable") == 0) {
3809                         hotkey_enabledisable_warn(1);
3810                 } else if (strlencmp(cmd, "disable") == 0) {
3811                         hotkey_enabledisable_warn(0);
3812                         res = -EPERM;
3813                 } else if (strlencmp(cmd, "reset") == 0) {
3814                         mask = (hotkey_all_mask | hotkey_source_mask)
3815                                 & ~hotkey_reserved_mask;
3816                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3817                         /* mask set */
3818                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3819                         /* mask set */
3820                 } else {
3821                         res = -EINVAL;
3822                         goto errexit;
3823                 }
3824         }
3825
3826         if (!res) {
3827                 tpacpi_disclose_usertask("procfs hotkey",
3828                         "set mask to 0x%08x\n", mask);
3829                 res = hotkey_user_mask_set(mask);
3830         }
3831
3832 errexit:
3833         mutex_unlock(&hotkey_mutex);
3834         return res;
3835 }
3836
3837 static const struct acpi_device_id ibm_htk_device_ids[] = {
3838         {TPACPI_ACPI_IBM_HKEY_HID, 0},
3839         {TPACPI_ACPI_LENOVO_HKEY_HID, 0},
3840         {"", 0},
3841 };
3842
3843 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3844         .hid = ibm_htk_device_ids,
3845         .notify = hotkey_notify,
3846         .handle = &hkey_handle,
3847         .type = ACPI_DEVICE_NOTIFY,
3848 };
3849
3850 static struct ibm_struct hotkey_driver_data = {
3851         .name = "hotkey",
3852         .read = hotkey_read,
3853         .write = hotkey_write,
3854         .exit = hotkey_exit,
3855         .resume = hotkey_resume,
3856         .suspend = hotkey_suspend,
3857         .acpi = &ibm_hotkey_acpidriver,
3858 };
3859
3860 /*************************************************************************
3861  * Bluetooth subdriver
3862  */
3863
3864 enum {
3865         /* ACPI GBDC/SBDC bits */
3866         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3867         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3868         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3869                                                    0 = disable, 1 = enable */
3870 };
3871
3872 enum {
3873         /* ACPI \BLTH commands */
3874         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3875         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3876         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3877         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3878         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3879 };
3880
3881 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3882
3883 static int bluetooth_get_status(void)
3884 {
3885         int status;
3886
3887 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3888         if (dbg_bluetoothemul)
3889                 return (tpacpi_bluetooth_emulstate) ?
3890                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3891 #endif
3892
3893         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3894                 return -EIO;
3895
3896         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3897                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3898 }
3899
3900 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3901 {
3902         int status;
3903
3904         vdbg_printk(TPACPI_DBG_RFKILL,
3905                 "will attempt to %s bluetooth\n",
3906                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3907
3908 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3909         if (dbg_bluetoothemul) {
3910                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3911                 return 0;
3912         }
3913 #endif
3914
3915         if (state == TPACPI_RFK_RADIO_ON)
3916                 status = TP_ACPI_BLUETOOTH_RADIOSSW
3917                           | TP_ACPI_BLUETOOTH_RESUMECTRL;
3918         else
3919                 status = 0;
3920
3921         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3922                 return -EIO;
3923
3924         return 0;
3925 }
3926
3927 /* sysfs bluetooth enable ---------------------------------------------- */
3928 static ssize_t bluetooth_enable_show(struct device *dev,
3929                            struct device_attribute *attr,
3930                            char *buf)
3931 {
3932         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3933                         attr, buf);
3934 }
3935
3936 static ssize_t bluetooth_enable_store(struct device *dev,
3937                             struct device_attribute *attr,
3938                             const char *buf, size_t count)
3939 {
3940         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3941                                 attr, buf, count);
3942 }
3943
3944 static struct device_attribute dev_attr_bluetooth_enable =
3945         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3946                 bluetooth_enable_show, bluetooth_enable_store);
3947
3948 /* --------------------------------------------------------------------- */
3949
3950 static struct attribute *bluetooth_attributes[] = {
3951         &dev_attr_bluetooth_enable.attr,
3952         NULL
3953 };
3954
3955 static const struct attribute_group bluetooth_attr_group = {
3956         .attrs = bluetooth_attributes,
3957 };
3958
3959 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3960         .get_status = bluetooth_get_status,
3961         .set_status = bluetooth_set_status,
3962 };
3963
3964 static void bluetooth_shutdown(void)
3965 {
3966         /* Order firmware to save current state to NVRAM */
3967         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3968                         TP_ACPI_BLTH_SAVE_STATE))
3969                 pr_notice("failed to save bluetooth state to NVRAM\n");
3970         else
3971                 vdbg_printk(TPACPI_DBG_RFKILL,
3972                         "bluetooth state saved to NVRAM\n");
3973 }
3974
3975 static void bluetooth_exit(void)
3976 {
3977         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3978                         &bluetooth_attr_group);
3979
3980         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3981
3982         bluetooth_shutdown();
3983 }
3984
3985 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3986 {
3987         int res;
3988         int status = 0;
3989
3990         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3991                         "initializing bluetooth subdriver\n");
3992
3993         TPACPI_ACPIHANDLE_INIT(hkey);
3994
3995         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3996            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3997         tp_features.bluetooth = hkey_handle &&
3998             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3999
4000         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4001                 "bluetooth is %s, status 0x%02x\n",
4002                 str_supported(tp_features.bluetooth),
4003                 status);
4004
4005 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4006         if (dbg_bluetoothemul) {
4007                 tp_features.bluetooth = 1;
4008                 pr_info("bluetooth switch emulation enabled\n");
4009         } else
4010 #endif
4011         if (tp_features.bluetooth &&
4012             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4013                 /* no bluetooth hardware present in system */
4014                 tp_features.bluetooth = 0;
4015                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4016                            "bluetooth hardware not installed\n");
4017         }
4018
4019         if (!tp_features.bluetooth)
4020                 return 1;
4021
4022         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4023                                 &bluetooth_tprfk_ops,
4024                                 RFKILL_TYPE_BLUETOOTH,
4025                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4026                                 true);
4027         if (res)
4028                 return res;
4029
4030         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4031                                 &bluetooth_attr_group);
4032         if (res) {
4033                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4034                 return res;
4035         }
4036
4037         return 0;
4038 }
4039
4040 /* procfs -------------------------------------------------------------- */
4041 static int bluetooth_read(struct seq_file *m)
4042 {
4043         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4044 }
4045
4046 static int bluetooth_write(char *buf)
4047 {
4048         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4049 }
4050
4051 static struct ibm_struct bluetooth_driver_data = {
4052         .name = "bluetooth",
4053         .read = bluetooth_read,
4054         .write = bluetooth_write,
4055         .exit = bluetooth_exit,
4056         .shutdown = bluetooth_shutdown,
4057 };
4058
4059 /*************************************************************************
4060  * Wan subdriver
4061  */
4062
4063 enum {
4064         /* ACPI GWAN/SWAN bits */
4065         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4066         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4067         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4068                                                    0 = disable, 1 = enable */
4069 };
4070
4071 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4072
4073 static int wan_get_status(void)
4074 {
4075         int status;
4076
4077 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4078         if (dbg_wwanemul)
4079                 return (tpacpi_wwan_emulstate) ?
4080                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4081 #endif
4082
4083         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4084                 return -EIO;
4085
4086         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4087                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4088 }
4089
4090 static int wan_set_status(enum tpacpi_rfkill_state state)
4091 {
4092         int status;
4093
4094         vdbg_printk(TPACPI_DBG_RFKILL,
4095                 "will attempt to %s wwan\n",
4096                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4097
4098 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4099         if (dbg_wwanemul) {
4100                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4101                 return 0;
4102         }
4103 #endif
4104
4105         if (state == TPACPI_RFK_RADIO_ON)
4106                 status = TP_ACPI_WANCARD_RADIOSSW
4107                          | TP_ACPI_WANCARD_RESUMECTRL;
4108         else
4109                 status = 0;
4110
4111         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4112                 return -EIO;
4113
4114         return 0;
4115 }
4116
4117 /* sysfs wan enable ---------------------------------------------------- */
4118 static ssize_t wan_enable_show(struct device *dev,
4119                            struct device_attribute *attr,
4120                            char *buf)
4121 {
4122         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4123                         attr, buf);
4124 }
4125
4126 static ssize_t wan_enable_store(struct device *dev,
4127                             struct device_attribute *attr,
4128                             const char *buf, size_t count)
4129 {
4130         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4131                         attr, buf, count);
4132 }
4133
4134 static struct device_attribute dev_attr_wan_enable =
4135         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4136                 wan_enable_show, wan_enable_store);
4137
4138 /* --------------------------------------------------------------------- */
4139
4140 static struct attribute *wan_attributes[] = {
4141         &dev_attr_wan_enable.attr,
4142         NULL
4143 };
4144
4145 static const struct attribute_group wan_attr_group = {
4146         .attrs = wan_attributes,
4147 };
4148
4149 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4150         .get_status = wan_get_status,
4151         .set_status = wan_set_status,
4152 };
4153
4154 static void wan_shutdown(void)
4155 {
4156         /* Order firmware to save current state to NVRAM */
4157         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4158                         TP_ACPI_WGSV_SAVE_STATE))
4159                 pr_notice("failed to save WWAN state to NVRAM\n");
4160         else
4161                 vdbg_printk(TPACPI_DBG_RFKILL,
4162                         "WWAN state saved to NVRAM\n");
4163 }
4164
4165 static void wan_exit(void)
4166 {
4167         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4168                 &wan_attr_group);
4169
4170         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4171
4172         wan_shutdown();
4173 }
4174
4175 static int __init wan_init(struct ibm_init_struct *iibm)
4176 {
4177         int res;
4178         int status = 0;
4179
4180         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4181                         "initializing wan subdriver\n");
4182
4183         TPACPI_ACPIHANDLE_INIT(hkey);
4184
4185         tp_features.wan = hkey_handle &&
4186             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4187
4188         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4189                 "wan is %s, status 0x%02x\n",
4190                 str_supported(tp_features.wan),
4191                 status);
4192
4193 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4194         if (dbg_wwanemul) {
4195                 tp_features.wan = 1;
4196                 pr_info("wwan switch emulation enabled\n");
4197         } else
4198 #endif
4199         if (tp_features.wan &&
4200             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4201                 /* no wan hardware present in system */
4202                 tp_features.wan = 0;
4203                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4204                            "wan hardware not installed\n");
4205         }
4206
4207         if (!tp_features.wan)
4208                 return 1;
4209
4210         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4211                                 &wan_tprfk_ops,
4212                                 RFKILL_TYPE_WWAN,
4213                                 TPACPI_RFK_WWAN_SW_NAME,
4214                                 true);
4215         if (res)
4216                 return res;
4217
4218         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4219                                 &wan_attr_group);
4220
4221         if (res) {
4222                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4223                 return res;
4224         }
4225
4226         return 0;
4227 }
4228
4229 /* procfs -------------------------------------------------------------- */
4230 static int wan_read(struct seq_file *m)
4231 {
4232         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4233 }
4234
4235 static int wan_write(char *buf)
4236 {
4237         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4238 }
4239
4240 static struct ibm_struct wan_driver_data = {
4241         .name = "wan",
4242         .read = wan_read,
4243         .write = wan_write,
4244         .exit = wan_exit,
4245         .shutdown = wan_shutdown,
4246 };
4247
4248 /*************************************************************************
4249  * UWB subdriver
4250  */
4251
4252 enum {
4253         /* ACPI GUWB/SUWB bits */
4254         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4255         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4256 };
4257
4258 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4259
4260 static int uwb_get_status(void)
4261 {
4262         int status;
4263
4264 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4265         if (dbg_uwbemul)
4266                 return (tpacpi_uwb_emulstate) ?
4267                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4268 #endif
4269
4270         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4271                 return -EIO;
4272
4273         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4274                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4275 }
4276
4277 static int uwb_set_status(enum tpacpi_rfkill_state state)
4278 {
4279         int status;
4280
4281         vdbg_printk(TPACPI_DBG_RFKILL,
4282                 "will attempt to %s UWB\n",
4283                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4284
4285 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4286         if (dbg_uwbemul) {
4287                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4288                 return 0;
4289         }
4290 #endif
4291
4292         if (state == TPACPI_RFK_RADIO_ON)
4293                 status = TP_ACPI_UWB_RADIOSSW;
4294         else
4295                 status = 0;
4296
4297         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4298                 return -EIO;
4299
4300         return 0;
4301 }
4302
4303 /* --------------------------------------------------------------------- */
4304
4305 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4306         .get_status = uwb_get_status,
4307         .set_status = uwb_set_status,
4308 };
4309
4310 static void uwb_exit(void)
4311 {
4312         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4313 }
4314
4315 static int __init uwb_init(struct ibm_init_struct *iibm)
4316 {
4317         int res;
4318         int status = 0;
4319
4320         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4321                         "initializing uwb subdriver\n");
4322
4323         TPACPI_ACPIHANDLE_INIT(hkey);
4324
4325         tp_features.uwb = hkey_handle &&
4326             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4327
4328         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4329                 "uwb is %s, status 0x%02x\n",
4330                 str_supported(tp_features.uwb),
4331                 status);
4332
4333 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4334         if (dbg_uwbemul) {
4335                 tp_features.uwb = 1;
4336                 pr_info("uwb switch emulation enabled\n");
4337         } else
4338 #endif
4339         if (tp_features.uwb &&
4340             !(status & TP_ACPI_UWB_HWPRESENT)) {
4341                 /* no uwb hardware present in system */
4342                 tp_features.uwb = 0;
4343                 dbg_printk(TPACPI_DBG_INIT,
4344                            "uwb hardware not installed\n");
4345         }
4346
4347         if (!tp_features.uwb)
4348                 return 1;
4349
4350         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4351                                 &uwb_tprfk_ops,
4352                                 RFKILL_TYPE_UWB,
4353                                 TPACPI_RFK_UWB_SW_NAME,
4354                                 false);
4355         return res;
4356 }
4357
4358 static struct ibm_struct uwb_driver_data = {
4359         .name = "uwb",
4360         .exit = uwb_exit,
4361         .flags.experimental = 1,
4362 };
4363
4364 /*************************************************************************
4365  * Video subdriver
4366  */
4367
4368 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4369
4370 enum video_access_mode {
4371         TPACPI_VIDEO_NONE = 0,
4372         TPACPI_VIDEO_570,       /* 570 */
4373         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4374         TPACPI_VIDEO_NEW,       /* all others */
4375 };
4376
4377 enum {  /* video status flags, based on VIDEO_570 */
4378         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4379         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4380         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4381 };
4382
4383 enum {  /* TPACPI_VIDEO_570 constants */
4384         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4385         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4386                                                  * video_status_flags */
4387         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4388         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4389 };
4390
4391 static enum video_access_mode video_supported;
4392 static int video_orig_autosw;
4393
4394 static int video_autosw_get(void);
4395 static int video_autosw_set(int enable);
4396
4397 TPACPI_HANDLE(vid, root,
4398               "\\_SB.PCI.AGP.VGA",      /* 570 */
4399               "\\_SB.PCI0.AGP0.VID0",   /* 600e/x, 770x */
4400               "\\_SB.PCI0.VID0",        /* 770e */
4401               "\\_SB.PCI0.VID",         /* A21e, G4x, R50e, X30, X40 */
4402               "\\_SB.PCI0.AGP.VGA",     /* X100e and a few others */
4403               "\\_SB.PCI0.AGP.VID",     /* all others */
4404         );                              /* R30, R31 */
4405
4406 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4407
4408 static int __init video_init(struct ibm_init_struct *iibm)
4409 {
4410         int ivga;
4411
4412         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4413
4414         TPACPI_ACPIHANDLE_INIT(vid);
4415         if (tpacpi_is_ibm())
4416                 TPACPI_ACPIHANDLE_INIT(vid2);
4417
4418         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4419                 /* G41, assume IVGA doesn't change */
4420                 vid_handle = vid2_handle;
4421
4422         if (!vid_handle)
4423                 /* video switching not supported on R30, R31 */
4424                 video_supported = TPACPI_VIDEO_NONE;
4425         else if (tpacpi_is_ibm() &&
4426                  acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4427                 /* 570 */
4428                 video_supported = TPACPI_VIDEO_570;
4429         else if (tpacpi_is_ibm() &&
4430                  acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4431                 /* 600e/x, 770e, 770x */
4432                 video_supported = TPACPI_VIDEO_770;
4433         else
4434                 /* all others */
4435                 video_supported = TPACPI_VIDEO_NEW;
4436
4437         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4438                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4439                 video_supported);
4440
4441         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4442 }
4443
4444 static void video_exit(void)
4445 {
4446         dbg_printk(TPACPI_DBG_EXIT,
4447                    "restoring original video autoswitch mode\n");
4448         if (video_autosw_set(video_orig_autosw))
4449                 pr_err("error while trying to restore original "
4450                         "video autoswitch mode\n");
4451 }
4452
4453 static int video_outputsw_get(void)
4454 {
4455         int status = 0;
4456         int i;
4457
4458         switch (video_supported) {
4459         case TPACPI_VIDEO_570:
4460                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4461                                  TP_ACPI_VIDEO_570_PHSCMD))
4462                         return -EIO;
4463                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4464                 break;
4465         case TPACPI_VIDEO_770:
4466                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4467                         return -EIO;
4468                 if (i)
4469                         status |= TP_ACPI_VIDEO_S_LCD;
4470                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4471                         return -EIO;
4472                 if (i)
4473                         status |= TP_ACPI_VIDEO_S_CRT;
4474                 break;
4475         case TPACPI_VIDEO_NEW:
4476                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4477                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4478                         return -EIO;
4479                 if (i)
4480                         status |= TP_ACPI_VIDEO_S_CRT;
4481
4482                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4483                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4484                         return -EIO;
4485                 if (i)
4486                         status |= TP_ACPI_VIDEO_S_LCD;
4487                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4488                         return -EIO;
4489                 if (i)
4490                         status |= TP_ACPI_VIDEO_S_DVI;
4491                 break;
4492         default:
4493                 return -ENOSYS;
4494         }
4495
4496         return status;
4497 }
4498
4499 static int video_outputsw_set(int status)
4500 {
4501         int autosw;
4502         int res = 0;
4503
4504         switch (video_supported) {
4505         case TPACPI_VIDEO_570:
4506                 res = acpi_evalf(NULL, NULL,
4507                                  "\\_SB.PHS2", "vdd",
4508                                  TP_ACPI_VIDEO_570_PHS2CMD,
4509                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4510                 break;
4511         case TPACPI_VIDEO_770:
4512                 autosw = video_autosw_get();
4513                 if (autosw < 0)
4514                         return autosw;
4515
4516                 res = video_autosw_set(1);
4517                 if (res)
4518                         return res;
4519                 res = acpi_evalf(vid_handle, NULL,
4520                                  "ASWT", "vdd", status * 0x100, 0);
4521                 if (!autosw && video_autosw_set(autosw)) {
4522                         pr_err("video auto-switch left enabled due to error\n");
4523                         return -EIO;
4524                 }
4525                 break;
4526         case TPACPI_VIDEO_NEW:
4527                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4528                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4529                 break;
4530         default:
4531                 return -ENOSYS;
4532         }
4533
4534         return (res)? 0 : -EIO;
4535 }
4536
4537 static int video_autosw_get(void)
4538 {
4539         int autosw = 0;
4540
4541         switch (video_supported) {
4542         case TPACPI_VIDEO_570:
4543                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4544                         return -EIO;
4545                 break;
4546         case TPACPI_VIDEO_770:
4547         case TPACPI_VIDEO_NEW:
4548                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4549                         return -EIO;
4550                 break;
4551         default:
4552                 return -ENOSYS;
4553         }
4554
4555         return autosw & 1;
4556 }
4557
4558 static int video_autosw_set(int enable)
4559 {
4560         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4561                 return -EIO;
4562         return 0;
4563 }
4564
4565 static int video_outputsw_cycle(void)
4566 {
4567         int autosw = video_autosw_get();
4568         int res;
4569
4570         if (autosw < 0)
4571                 return autosw;
4572
4573         switch (video_supported) {
4574         case TPACPI_VIDEO_570:
4575                 res = video_autosw_set(1);
4576                 if (res)
4577                         return res;
4578                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4579                 break;
4580         case TPACPI_VIDEO_770:
4581         case TPACPI_VIDEO_NEW:
4582                 res = video_autosw_set(1);
4583                 if (res)
4584                         return res;
4585                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4586                 break;
4587         default:
4588                 return -ENOSYS;
4589         }
4590         if (!autosw && video_autosw_set(autosw)) {
4591                 pr_err("video auto-switch left enabled due to error\n");
4592                 return -EIO;
4593         }
4594
4595         return (res)? 0 : -EIO;
4596 }
4597
4598 static int video_expand_toggle(void)
4599 {
4600         switch (video_supported) {
4601         case TPACPI_VIDEO_570:
4602                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4603                         0 : -EIO;
4604         case TPACPI_VIDEO_770:
4605                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4606                         0 : -EIO;
4607         case TPACPI_VIDEO_NEW:
4608                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4609                         0 : -EIO;
4610         default:
4611                 return -ENOSYS;
4612         }
4613         /* not reached */
4614 }
4615
4616 static int video_read(struct seq_file *m)
4617 {
4618         int status, autosw;
4619
4620         if (video_supported == TPACPI_VIDEO_NONE) {
4621                 seq_printf(m, "status:\t\tnot supported\n");
4622                 return 0;
4623         }
4624
4625         /* Even reads can crash X.org, so... */
4626         if (!capable(CAP_SYS_ADMIN))
4627                 return -EPERM;
4628
4629         status = video_outputsw_get();
4630         if (status < 0)
4631                 return status;
4632
4633         autosw = video_autosw_get();
4634         if (autosw < 0)
4635                 return autosw;
4636
4637         seq_printf(m, "status:\t\tsupported\n");
4638         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4639         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4640         if (video_supported == TPACPI_VIDEO_NEW)
4641                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4642         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4643         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4644         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4645         if (video_supported == TPACPI_VIDEO_NEW)
4646                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4647         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4648         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4649
4650         return 0;
4651 }
4652
4653 static int video_write(char *buf)
4654 {
4655         char *cmd;
4656         int enable, disable, status;
4657         int res;
4658
4659         if (video_supported == TPACPI_VIDEO_NONE)
4660                 return -ENODEV;
4661
4662         /* Even reads can crash X.org, let alone writes... */
4663         if (!capable(CAP_SYS_ADMIN))
4664                 return -EPERM;
4665
4666         enable = 0;
4667         disable = 0;
4668
4669         while ((cmd = next_cmd(&buf))) {
4670                 if (strlencmp(cmd, "lcd_enable") == 0) {
4671                         enable |= TP_ACPI_VIDEO_S_LCD;
4672                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4673                         disable |= TP_ACPI_VIDEO_S_LCD;
4674                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4675                         enable |= TP_ACPI_VIDEO_S_CRT;
4676                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4677                         disable |= TP_ACPI_VIDEO_S_CRT;
4678                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4679                            strlencmp(cmd, "dvi_enable") == 0) {
4680                         enable |= TP_ACPI_VIDEO_S_DVI;
4681                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4682                            strlencmp(cmd, "dvi_disable") == 0) {
4683                         disable |= TP_ACPI_VIDEO_S_DVI;
4684                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4685                         res = video_autosw_set(1);
4686                         if (res)
4687                                 return res;
4688                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4689                         res = video_autosw_set(0);
4690                         if (res)
4691                                 return res;
4692                 } else if (strlencmp(cmd, "video_switch") == 0) {
4693                         res = video_outputsw_cycle();
4694                         if (res)
4695                                 return res;
4696                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4697                         res = video_expand_toggle();
4698                         if (res)
4699                                 return res;
4700                 } else
4701                         return -EINVAL;
4702         }
4703
4704         if (enable || disable) {
4705                 status = video_outputsw_get();
4706                 if (status < 0)
4707                         return status;
4708                 res = video_outputsw_set((status & ~disable) | enable);
4709                 if (res)
4710                         return res;
4711         }
4712
4713         return 0;
4714 }
4715
4716 static struct ibm_struct video_driver_data = {
4717         .name = "video",
4718         .read = video_read,
4719         .write = video_write,
4720         .exit = video_exit,
4721 };
4722
4723 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4724
4725 /*************************************************************************
4726  * Light (thinklight) subdriver
4727  */
4728
4729 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4730 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4731
4732 static int light_get_status(void)
4733 {
4734         int status = 0;
4735
4736         if (tp_features.light_status) {
4737                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4738                         return -EIO;
4739                 return (!!status);
4740         }
4741
4742         return -ENXIO;
4743 }
4744
4745 static int light_set_status(int status)
4746 {
4747         int rc;
4748
4749         if (tp_features.light) {
4750                 if (cmos_handle) {
4751                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4752                                         (status)?
4753                                                 TP_CMOS_THINKLIGHT_ON :
4754                                                 TP_CMOS_THINKLIGHT_OFF);
4755                 } else {
4756                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4757                                         (status)? 1 : 0);
4758                 }
4759                 return (rc)? 0 : -EIO;
4760         }
4761
4762         return -ENXIO;
4763 }
4764
4765 static void light_set_status_worker(struct work_struct *work)
4766 {
4767         struct tpacpi_led_classdev *data =
4768                         container_of(work, struct tpacpi_led_classdev, work);
4769
4770         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4771                 light_set_status((data->new_state != TPACPI_LED_OFF));
4772 }
4773
4774 static void light_sysfs_set(struct led_classdev *led_cdev,
4775                         enum led_brightness brightness)
4776 {
4777         struct tpacpi_led_classdev *data =
4778                 container_of(led_cdev,
4779                              struct tpacpi_led_classdev,
4780                              led_classdev);
4781         data->new_state = (brightness != LED_OFF) ?
4782                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4783         queue_work(tpacpi_wq, &data->work);
4784 }
4785
4786 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4787 {
4788         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4789 }
4790
4791 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4792         .led_classdev = {
4793                 .name           = "tpacpi::thinklight",
4794                 .brightness_set = &light_sysfs_set,
4795                 .brightness_get = &light_sysfs_get,
4796         }
4797 };
4798
4799 static int __init light_init(struct ibm_init_struct *iibm)
4800 {
4801         int rc;
4802
4803         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4804
4805         if (tpacpi_is_ibm()) {
4806                 TPACPI_ACPIHANDLE_INIT(ledb);
4807                 TPACPI_ACPIHANDLE_INIT(lght);
4808         }
4809         TPACPI_ACPIHANDLE_INIT(cmos);
4810         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4811
4812         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4813         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4814
4815         if (tp_features.light)
4816                 /* light status not supported on
4817                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4818                 tp_features.light_status =
4819                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4820
4821         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4822                 str_supported(tp_features.light),
4823                 str_supported(tp_features.light_status));
4824
4825         if (!tp_features.light)
4826                 return 1;
4827
4828         rc = led_classdev_register(&tpacpi_pdev->dev,
4829                                    &tpacpi_led_thinklight.led_classdev);
4830
4831         if (rc < 0) {
4832                 tp_features.light = 0;
4833                 tp_features.light_status = 0;
4834         } else  {
4835                 rc = 0;
4836         }
4837
4838         return rc;
4839 }
4840
4841 static void light_exit(void)
4842 {
4843         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4844         flush_workqueue(tpacpi_wq);
4845 }
4846
4847 static int light_read(struct seq_file *m)
4848 {
4849         int status;
4850
4851         if (!tp_features.light) {
4852                 seq_printf(m, "status:\t\tnot supported\n");
4853         } else if (!tp_features.light_status) {
4854                 seq_printf(m, "status:\t\tunknown\n");
4855                 seq_printf(m, "commands:\ton, off\n");
4856         } else {
4857                 status = light_get_status();
4858                 if (status < 0)
4859                         return status;
4860                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4861                 seq_printf(m, "commands:\ton, off\n");
4862         }
4863
4864         return 0;
4865 }
4866
4867 static int light_write(char *buf)
4868 {
4869         char *cmd;
4870         int newstatus = 0;
4871
4872         if (!tp_features.light)
4873                 return -ENODEV;
4874
4875         while ((cmd = next_cmd(&buf))) {
4876                 if (strlencmp(cmd, "on") == 0) {
4877                         newstatus = 1;
4878                 } else if (strlencmp(cmd, "off") == 0) {
4879                         newstatus = 0;
4880                 } else
4881                         return -EINVAL;
4882         }
4883
4884         return light_set_status(newstatus);
4885 }
4886
4887 static struct ibm_struct light_driver_data = {
4888         .name = "light",
4889         .read = light_read,
4890         .write = light_write,
4891         .exit = light_exit,
4892 };
4893
4894 /*************************************************************************
4895  * CMOS subdriver
4896  */
4897
4898 /* sysfs cmos_command -------------------------------------------------- */
4899 static ssize_t cmos_command_store(struct device *dev,
4900                             struct device_attribute *attr,
4901                             const char *buf, size_t count)
4902 {
4903         unsigned long cmos_cmd;
4904         int res;
4905
4906         if (parse_strtoul(buf, 21, &cmos_cmd))
4907                 return -EINVAL;
4908
4909         res = issue_thinkpad_cmos_command(cmos_cmd);
4910         return (res)? res : count;
4911 }
4912
4913 static struct device_attribute dev_attr_cmos_command =
4914         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4915
4916 /* --------------------------------------------------------------------- */
4917
4918 static int __init cmos_init(struct ibm_init_struct *iibm)
4919 {
4920         int res;
4921
4922         vdbg_printk(TPACPI_DBG_INIT,
4923                 "initializing cmos commands subdriver\n");
4924
4925         TPACPI_ACPIHANDLE_INIT(cmos);
4926
4927         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4928                 str_supported(cmos_handle != NULL));
4929
4930         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4931         if (res)
4932                 return res;
4933
4934         return (cmos_handle)? 0 : 1;
4935 }
4936
4937 static void cmos_exit(void)
4938 {
4939         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4940 }
4941
4942 static int cmos_read(struct seq_file *m)
4943 {
4944         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4945            R30, R31, T20-22, X20-21 */
4946         if (!cmos_handle)
4947                 seq_printf(m, "status:\t\tnot supported\n");
4948         else {
4949                 seq_printf(m, "status:\t\tsupported\n");
4950                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4951         }
4952
4953         return 0;
4954 }
4955
4956 static int cmos_write(char *buf)
4957 {
4958         char *cmd;
4959         int cmos_cmd, res;
4960
4961         while ((cmd = next_cmd(&buf))) {
4962                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4963                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4964                         /* cmos_cmd set */
4965                 } else
4966                         return -EINVAL;
4967
4968                 res = issue_thinkpad_cmos_command(cmos_cmd);
4969                 if (res)
4970                         return res;
4971         }
4972
4973         return 0;
4974 }
4975
4976 static struct ibm_struct cmos_driver_data = {
4977         .name = "cmos",
4978         .read = cmos_read,
4979         .write = cmos_write,
4980         .exit = cmos_exit,
4981 };
4982
4983 /*************************************************************************
4984  * LED subdriver
4985  */
4986
4987 enum led_access_mode {
4988         TPACPI_LED_NONE = 0,
4989         TPACPI_LED_570, /* 570 */
4990         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4991         TPACPI_LED_NEW, /* all others */
4992 };
4993
4994 enum {  /* For TPACPI_LED_OLD */
4995         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4996         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4997         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4998 };
4999
5000 static enum led_access_mode led_supported;
5001
5002 static acpi_handle led_handle;
5003
5004 #define TPACPI_LED_NUMLEDS 16
5005 static struct tpacpi_led_classdev *tpacpi_leds;
5006 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5007 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5008         /* there's a limit of 19 chars + NULL before 2.6.26 */
5009         "tpacpi::power",
5010         "tpacpi:orange:batt",
5011         "tpacpi:green:batt",
5012         "tpacpi::dock_active",
5013         "tpacpi::bay_active",
5014         "tpacpi::dock_batt",
5015         "tpacpi::unknown_led",
5016         "tpacpi::standby",
5017         "tpacpi::dock_status1",
5018         "tpacpi::dock_status2",
5019         "tpacpi::unknown_led2",
5020         "tpacpi::unknown_led3",
5021         "tpacpi::thinkvantage",
5022 };
5023 #define TPACPI_SAFE_LEDS        0x1081U
5024
5025 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5026 {
5027 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5028         return false;
5029 #else
5030         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5031 #endif
5032 }
5033
5034 static int led_get_status(const unsigned int led)
5035 {
5036         int status;
5037         enum led_status_t led_s;
5038
5039         switch (led_supported) {
5040         case TPACPI_LED_570:
5041                 if (!acpi_evalf(ec_handle,
5042                                 &status, "GLED", "dd", 1 << led))
5043                         return -EIO;
5044                 led_s = (status == 0)?
5045                                 TPACPI_LED_OFF :
5046                                 ((status == 1)?
5047                                         TPACPI_LED_ON :
5048                                         TPACPI_LED_BLINK);
5049                 tpacpi_led_state_cache[led] = led_s;
5050                 return led_s;
5051         default:
5052                 return -ENXIO;
5053         }
5054
5055         /* not reached */
5056 }
5057
5058 static int led_set_status(const unsigned int led,
5059                           const enum led_status_t ledstatus)
5060 {
5061         /* off, on, blink. Index is led_status_t */
5062         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5063         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5064
5065         int rc = 0;
5066
5067         switch (led_supported) {
5068         case TPACPI_LED_570:
5069                 /* 570 */
5070                 if (unlikely(led > 7))
5071                         return -EINVAL;
5072                 if (unlikely(tpacpi_is_led_restricted(led)))
5073                         return -EPERM;
5074                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5075                                 (1 << led), led_sled_arg1[ledstatus]))
5076                         rc = -EIO;
5077                 break;
5078         case TPACPI_LED_OLD:
5079                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5080                 if (unlikely(led > 7))
5081                         return -EINVAL;
5082                 if (unlikely(tpacpi_is_led_restricted(led)))
5083                         return -EPERM;
5084                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5085                 if (rc >= 0)
5086                         rc = ec_write(TPACPI_LED_EC_HLBL,
5087                                       (ledstatus == TPACPI_LED_BLINK) << led);
5088                 if (rc >= 0)
5089                         rc = ec_write(TPACPI_LED_EC_HLCL,
5090                                       (ledstatus != TPACPI_LED_OFF) << led);
5091                 break;
5092         case TPACPI_LED_NEW:
5093                 /* all others */
5094                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5095                         return -EINVAL;
5096                 if (unlikely(tpacpi_is_led_restricted(led)))
5097                         return -EPERM;
5098                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5099                                 led, led_led_arg1[ledstatus]))
5100                         rc = -EIO;
5101                 break;
5102         default:
5103                 rc = -ENXIO;
5104         }
5105
5106         if (!rc)
5107                 tpacpi_led_state_cache[led] = ledstatus;
5108
5109         return rc;
5110 }
5111
5112 static void led_set_status_worker(struct work_struct *work)
5113 {
5114         struct tpacpi_led_classdev *data =
5115                 container_of(work, struct tpacpi_led_classdev, work);
5116
5117         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5118                 led_set_status(data->led, data->new_state);
5119 }
5120
5121 static void led_sysfs_set(struct led_classdev *led_cdev,
5122                         enum led_brightness brightness)
5123 {
5124         struct tpacpi_led_classdev *data = container_of(led_cdev,
5125                              struct tpacpi_led_classdev, led_classdev);
5126
5127         if (brightness == LED_OFF)
5128                 data->new_state = TPACPI_LED_OFF;
5129         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5130                 data->new_state = TPACPI_LED_ON;
5131         else
5132                 data->new_state = TPACPI_LED_BLINK;
5133
5134         queue_work(tpacpi_wq, &data->work);
5135 }
5136
5137 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5138                         unsigned long *delay_on, unsigned long *delay_off)
5139 {
5140         struct tpacpi_led_classdev *data = container_of(led_cdev,
5141                              struct tpacpi_led_classdev, led_classdev);
5142
5143         /* Can we choose the flash rate? */
5144         if (*delay_on == 0 && *delay_off == 0) {
5145                 /* yes. set them to the hardware blink rate (1 Hz) */
5146                 *delay_on = 500; /* ms */
5147                 *delay_off = 500; /* ms */
5148         } else if ((*delay_on != 500) || (*delay_off != 500))
5149                 return -EINVAL;
5150
5151         data->new_state = TPACPI_LED_BLINK;
5152         queue_work(tpacpi_wq, &data->work);
5153
5154         return 0;
5155 }
5156
5157 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5158 {
5159         int rc;
5160
5161         struct tpacpi_led_classdev *data = container_of(led_cdev,
5162                              struct tpacpi_led_classdev, led_classdev);
5163
5164         rc = led_get_status(data->led);
5165
5166         if (rc == TPACPI_LED_OFF || rc < 0)
5167                 rc = LED_OFF;   /* no error handling in led class :( */
5168         else
5169                 rc = LED_FULL;
5170
5171         return rc;
5172 }
5173
5174 static void led_exit(void)
5175 {
5176         unsigned int i;
5177
5178         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5179                 if (tpacpi_leds[i].led_classdev.name)
5180                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5181         }
5182
5183         flush_workqueue(tpacpi_wq);
5184         kfree(tpacpi_leds);
5185 }
5186
5187 static int __init tpacpi_init_led(unsigned int led)
5188 {
5189         int rc;
5190
5191         tpacpi_leds[led].led = led;
5192
5193         /* LEDs with no name don't get registered */
5194         if (!tpacpi_led_names[led])
5195                 return 0;
5196
5197         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5198         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5199         if (led_supported == TPACPI_LED_570)
5200                 tpacpi_leds[led].led_classdev.brightness_get =
5201                                                 &led_sysfs_get;
5202
5203         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5204
5205         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5206
5207         rc = led_classdev_register(&tpacpi_pdev->dev,
5208                                 &tpacpi_leds[led].led_classdev);
5209         if (rc < 0)
5210                 tpacpi_leds[led].led_classdev.name = NULL;
5211
5212         return rc;
5213 }
5214
5215 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5216         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5217         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5218         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5219
5220         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5221         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5222         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5223         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5224         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5225         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5226         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5227         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5228
5229         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5230         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5231         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5232         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5233         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5234
5235         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5236         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5237         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5238         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5239
5240         /* (1) - may have excess leds enabled on MSB */
5241
5242         /* Defaults (order matters, keep last, don't reorder!) */
5243         { /* Lenovo */
5244           .vendor = PCI_VENDOR_ID_LENOVO,
5245           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5246           .quirks = 0x1fffU,
5247         },
5248         { /* IBM ThinkPads with no EC version string */
5249           .vendor = PCI_VENDOR_ID_IBM,
5250           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5251           .quirks = 0x00ffU,
5252         },
5253         { /* IBM ThinkPads with EC version string */
5254           .vendor = PCI_VENDOR_ID_IBM,
5255           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5256           .quirks = 0x00bfU,
5257         },
5258 };
5259
5260 #undef TPACPI_LEDQ_IBM
5261 #undef TPACPI_LEDQ_LNV
5262
5263 static enum led_access_mode __init led_init_detect_mode(void)
5264 {
5265         acpi_status status;
5266
5267         if (tpacpi_is_ibm()) {
5268                 /* 570 */
5269                 status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5270                 if (ACPI_SUCCESS(status))
5271                         return TPACPI_LED_570;
5272
5273                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5274                 status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5275                 if (ACPI_SUCCESS(status))
5276                         return TPACPI_LED_OLD;
5277         }
5278
5279         /* most others */
5280         status = acpi_get_handle(ec_handle, "LED", &led_handle);
5281         if (ACPI_SUCCESS(status))
5282                 return TPACPI_LED_NEW;
5283
5284         /* R30, R31, and unknown firmwares */
5285         led_handle = NULL;
5286         return TPACPI_LED_NONE;
5287 }
5288
5289 static int __init led_init(struct ibm_init_struct *iibm)
5290 {
5291         unsigned int i;
5292         int rc;
5293         unsigned long useful_leds;
5294
5295         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5296
5297         led_supported = led_init_detect_mode();
5298
5299         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5300                 str_supported(led_supported), led_supported);
5301
5302         if (led_supported == TPACPI_LED_NONE)
5303                 return 1;
5304
5305         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5306                               GFP_KERNEL);
5307         if (!tpacpi_leds) {
5308                 pr_err("Out of memory for LED data\n");
5309                 return -ENOMEM;
5310         }
5311
5312         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5313                                           ARRAY_SIZE(led_useful_qtable));
5314
5315         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5316                 if (!tpacpi_is_led_restricted(i) &&
5317                     test_bit(i, &useful_leds)) {
5318                         rc = tpacpi_init_led(i);
5319                         if (rc < 0) {
5320                                 led_exit();
5321                                 return rc;
5322                         }
5323                 }
5324         }
5325
5326 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5327         pr_notice("warning: userspace override of important "
5328                   "firmware LEDs is enabled\n");
5329 #endif
5330         return 0;
5331 }
5332
5333 #define str_led_status(s) \
5334         ((s) == TPACPI_LED_OFF ? "off" : \
5335                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5336
5337 static int led_read(struct seq_file *m)
5338 {
5339         if (!led_supported) {
5340                 seq_printf(m, "status:\t\tnot supported\n");
5341                 return 0;
5342         }
5343         seq_printf(m, "status:\t\tsupported\n");
5344
5345         if (led_supported == TPACPI_LED_570) {
5346                 /* 570 */
5347                 int i, status;
5348                 for (i = 0; i < 8; i++) {
5349                         status = led_get_status(i);
5350                         if (status < 0)
5351                                 return -EIO;
5352                         seq_printf(m, "%d:\t\t%s\n",
5353                                        i, str_led_status(status));
5354                 }
5355         }
5356
5357         seq_printf(m, "commands:\t"
5358                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5359
5360         return 0;
5361 }
5362
5363 static int led_write(char *buf)
5364 {
5365         char *cmd;
5366         int led, rc;
5367         enum led_status_t s;
5368
5369         if (!led_supported)
5370                 return -ENODEV;
5371
5372         while ((cmd = next_cmd(&buf))) {
5373                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5374                         return -EINVAL;
5375
5376                 if (strstr(cmd, "off")) {
5377                         s = TPACPI_LED_OFF;
5378                 } else if (strstr(cmd, "on")) {
5379                         s = TPACPI_LED_ON;
5380                 } else if (strstr(cmd, "blink")) {
5381                         s = TPACPI_LED_BLINK;
5382                 } else {
5383                         return -EINVAL;
5384                 }
5385
5386                 rc = led_set_status(led, s);
5387                 if (rc < 0)
5388                         return rc;
5389         }
5390
5391         return 0;
5392 }
5393
5394 static struct ibm_struct led_driver_data = {
5395         .name = "led",
5396         .read = led_read,
5397         .write = led_write,
5398         .exit = led_exit,
5399 };
5400
5401 /*************************************************************************
5402  * Beep subdriver
5403  */
5404
5405 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5406
5407 #define TPACPI_BEEP_Q1 0x0001
5408
5409 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5410         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5411         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5412 };
5413
5414 static int __init beep_init(struct ibm_init_struct *iibm)
5415 {
5416         unsigned long quirks;
5417
5418         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5419
5420         TPACPI_ACPIHANDLE_INIT(beep);
5421
5422         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5423                 str_supported(beep_handle != NULL));
5424
5425         quirks = tpacpi_check_quirks(beep_quirk_table,
5426                                      ARRAY_SIZE(beep_quirk_table));
5427
5428         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5429
5430         return (beep_handle)? 0 : 1;
5431 }
5432
5433 static int beep_read(struct seq_file *m)
5434 {
5435         if (!beep_handle)
5436                 seq_printf(m, "status:\t\tnot supported\n");
5437         else {
5438                 seq_printf(m, "status:\t\tsupported\n");
5439                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5440         }
5441
5442         return 0;
5443 }
5444
5445 static int beep_write(char *buf)
5446 {
5447         char *cmd;
5448         int beep_cmd;
5449
5450         if (!beep_handle)
5451                 return -ENODEV;
5452
5453         while ((cmd = next_cmd(&buf))) {
5454                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5455                     beep_cmd >= 0 && beep_cmd <= 17) {
5456                         /* beep_cmd set */
5457                 } else
5458                         return -EINVAL;
5459                 if (tp_features.beep_needs_two_args) {
5460                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5461                                         beep_cmd, 0))
5462                                 return -EIO;
5463                 } else {
5464                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5465                                         beep_cmd))
5466                                 return -EIO;
5467                 }
5468         }
5469
5470         return 0;
5471 }
5472
5473 static struct ibm_struct beep_driver_data = {
5474         .name = "beep",
5475         .read = beep_read,
5476         .write = beep_write,
5477 };
5478
5479 /*************************************************************************
5480  * Thermal subdriver
5481  */
5482
5483 enum thermal_access_mode {
5484         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5485         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5486         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5487         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5488         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5489 };
5490
5491 enum { /* TPACPI_THERMAL_TPEC_* */
5492         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5493         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5494         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5495
5496         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5497 };
5498
5499
5500 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5501 struct ibm_thermal_sensors_struct {
5502         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5503 };
5504
5505 static enum thermal_access_mode thermal_read_mode;
5506
5507 /* idx is zero-based */
5508 static int thermal_get_sensor(int idx, s32 *value)
5509 {
5510         int t;
5511         s8 tmp;
5512         char tmpi[5];
5513
5514         t = TP_EC_THERMAL_TMP0;
5515
5516         switch (thermal_read_mode) {
5517 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5518         case TPACPI_THERMAL_TPEC_16:
5519                 if (idx >= 8 && idx <= 15) {
5520                         t = TP_EC_THERMAL_TMP8;
5521                         idx -= 8;
5522                 }
5523                 /* fallthrough */
5524 #endif
5525         case TPACPI_THERMAL_TPEC_8:
5526                 if (idx <= 7) {
5527                         if (!acpi_ec_read(t + idx, &tmp))
5528                                 return -EIO;
5529                         *value = tmp * 1000;
5530                         return 0;
5531                 }
5532                 break;
5533
5534         case TPACPI_THERMAL_ACPI_UPDT:
5535                 if (idx <= 7) {
5536                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5537                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5538                                 return -EIO;
5539                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5540                                 return -EIO;
5541                         *value = (t - 2732) * 100;
5542                         return 0;
5543                 }
5544                 break;
5545
5546         case TPACPI_THERMAL_ACPI_TMP07:
5547                 if (idx <= 7) {
5548                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5549                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5550                                 return -EIO;
5551                         if (t > 127 || t < -127)
5552                                 t = TP_EC_THERMAL_TMP_NA;
5553                         *value = t * 1000;
5554                         return 0;
5555                 }
5556                 break;
5557
5558         case TPACPI_THERMAL_NONE:
5559         default:
5560                 return -ENOSYS;
5561         }
5562
5563         return -EINVAL;
5564 }
5565
5566 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5567 {
5568         int res, i;
5569         int n;
5570
5571         n = 8;
5572         i = 0;
5573
5574         if (!s)
5575                 return -EINVAL;
5576
5577         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5578                 n = 16;
5579
5580         for (i = 0 ; i < n; i++) {
5581                 res = thermal_get_sensor(i, &s->temp[i]);
5582                 if (res)
5583                         return res;
5584         }
5585
5586         return n;
5587 }
5588
5589 static void thermal_dump_all_sensors(void)
5590 {
5591         int n, i;
5592         struct ibm_thermal_sensors_struct t;
5593
5594         n = thermal_get_sensors(&t);
5595         if (n <= 0)
5596                 return;
5597
5598         pr_notice("temperatures (Celsius):");
5599
5600         for (i = 0; i < n; i++) {
5601                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5602                         pr_cont(" %d", (int)(t.temp[i] / 1000));
5603                 else
5604                         pr_cont(" N/A");
5605         }
5606
5607         pr_cont("\n");
5608 }
5609
5610 /* sysfs temp##_input -------------------------------------------------- */
5611
5612 static ssize_t thermal_temp_input_show(struct device *dev,
5613                            struct device_attribute *attr,
5614                            char *buf)
5615 {
5616         struct sensor_device_attribute *sensor_attr =
5617                                         to_sensor_dev_attr(attr);
5618         int idx = sensor_attr->index;
5619         s32 value;
5620         int res;
5621
5622         res = thermal_get_sensor(idx, &value);
5623         if (res)
5624                 return res;
5625         if (value == TPACPI_THERMAL_SENSOR_NA)
5626                 return -ENXIO;
5627
5628         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5629 }
5630
5631 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5632          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5633                      thermal_temp_input_show, NULL, _idxB)
5634
5635 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5636         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5637         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5638         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5639         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5640         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5641         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5642         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5643         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5644         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5645         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5646         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5647         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5648         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5649         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5650         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5651         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5652 };
5653
5654 #define THERMAL_ATTRS(X) \
5655         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5656
5657 static struct attribute *thermal_temp_input_attr[] = {
5658         THERMAL_ATTRS(8),
5659         THERMAL_ATTRS(9),
5660         THERMAL_ATTRS(10),
5661         THERMAL_ATTRS(11),
5662         THERMAL_ATTRS(12),
5663         THERMAL_ATTRS(13),
5664         THERMAL_ATTRS(14),
5665         THERMAL_ATTRS(15),
5666         THERMAL_ATTRS(0),
5667         THERMAL_ATTRS(1),
5668         THERMAL_ATTRS(2),
5669         THERMAL_ATTRS(3),
5670         THERMAL_ATTRS(4),
5671         THERMAL_ATTRS(5),
5672         THERMAL_ATTRS(6),
5673         THERMAL_ATTRS(7),
5674         NULL
5675 };
5676
5677 static const struct attribute_group thermal_temp_input16_group = {
5678         .attrs = thermal_temp_input_attr
5679 };
5680
5681 static const struct attribute_group thermal_temp_input8_group = {
5682         .attrs = &thermal_temp_input_attr[8]
5683 };
5684
5685 #undef THERMAL_SENSOR_ATTR_TEMP
5686 #undef THERMAL_ATTRS
5687
5688 /* --------------------------------------------------------------------- */
5689
5690 static int __init thermal_init(struct ibm_init_struct *iibm)
5691 {
5692         u8 t, ta1, ta2;
5693         int i;
5694         int acpi_tmp7;
5695         int res;
5696
5697         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5698
5699         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5700
5701         if (thinkpad_id.ec_model) {
5702                 /*
5703                  * Direct EC access mode: sensors at registers
5704                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5705                  * non-implemented, thermal sensors return 0x80 when
5706                  * not available
5707                  */
5708
5709                 ta1 = ta2 = 0;
5710                 for (i = 0; i < 8; i++) {
5711                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5712                                 ta1 |= t;
5713                         } else {
5714                                 ta1 = 0;
5715                                 break;
5716                         }
5717                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5718                                 ta2 |= t;
5719                         } else {
5720                                 ta1 = 0;
5721                                 break;
5722                         }
5723                 }
5724                 if (ta1 == 0) {
5725                         /* This is sheer paranoia, but we handle it anyway */
5726                         if (acpi_tmp7) {
5727                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5728                                        "falling back to ACPI TMPx access "
5729                                        "mode\n");
5730                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5731                         } else {
5732                                 pr_err("ThinkPad ACPI EC access misbehaving, "
5733                                        "disabling thermal sensors access\n");
5734                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5735                         }
5736                 } else {
5737                         thermal_read_mode =
5738                             (ta2 != 0) ?
5739                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5740                 }
5741         } else if (acpi_tmp7) {
5742                 if (tpacpi_is_ibm() &&
5743                     acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5744                         /* 600e/x, 770e, 770x */
5745                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5746                 } else {
5747                         /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
5748                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5749                 }
5750         } else {
5751                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5752                 thermal_read_mode = TPACPI_THERMAL_NONE;
5753         }
5754
5755         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5756                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5757                 thermal_read_mode);
5758
5759         switch (thermal_read_mode) {
5760         case TPACPI_THERMAL_TPEC_16:
5761                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5762                                 &thermal_temp_input16_group);
5763                 if (res)
5764                         return res;
5765                 break;
5766         case TPACPI_THERMAL_TPEC_8:
5767         case TPACPI_THERMAL_ACPI_TMP07:
5768         case TPACPI_THERMAL_ACPI_UPDT:
5769                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5770                                 &thermal_temp_input8_group);
5771                 if (res)
5772                         return res;
5773                 break;
5774         case TPACPI_THERMAL_NONE:
5775         default:
5776                 return 1;
5777         }
5778
5779         return 0;
5780 }
5781
5782 static void thermal_exit(void)
5783 {
5784         switch (thermal_read_mode) {
5785         case TPACPI_THERMAL_TPEC_16:
5786                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5787                                    &thermal_temp_input16_group);
5788                 break;
5789         case TPACPI_THERMAL_TPEC_8:
5790         case TPACPI_THERMAL_ACPI_TMP07:
5791         case TPACPI_THERMAL_ACPI_UPDT:
5792                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5793                                    &thermal_temp_input8_group);
5794                 break;
5795         case TPACPI_THERMAL_NONE:
5796         default:
5797                 break;
5798         }
5799 }
5800
5801 static int thermal_read(struct seq_file *m)
5802 {
5803         int n, i;
5804         struct ibm_thermal_sensors_struct t;
5805
5806         n = thermal_get_sensors(&t);
5807         if (unlikely(n < 0))
5808                 return n;
5809
5810         seq_printf(m, "temperatures:\t");
5811
5812         if (n > 0) {
5813                 for (i = 0; i < (n - 1); i++)
5814                         seq_printf(m, "%d ", t.temp[i] / 1000);
5815                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5816         } else
5817                 seq_printf(m, "not supported\n");
5818
5819         return 0;
5820 }
5821
5822 static struct ibm_struct thermal_driver_data = {
5823         .name = "thermal",
5824         .read = thermal_read,
5825         .exit = thermal_exit,
5826 };
5827
5828 /*************************************************************************
5829  * Backlight/brightness subdriver
5830  */
5831
5832 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5833
5834 /*
5835  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5836  * CMOS NVRAM byte 0x5E, bits 0-3.
5837  *
5838  * EC HBRV (0x31) has the following layout
5839  *   Bit 7: unknown function
5840  *   Bit 6: unknown function
5841  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5842  *   Bit 4: must be set to zero to avoid problems
5843  *   Bit 3-0: backlight brightness level
5844  *
5845  * brightness_get_raw returns status data in the HBRV layout
5846  *
5847  * WARNING: The X61 has been verified to use HBRV for something else, so
5848  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5849  * testing on the very early *60 Lenovo models...
5850  */
5851
5852 enum {
5853         TP_EC_BACKLIGHT = 0x31,
5854
5855         /* TP_EC_BACKLIGHT bitmasks */
5856         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5857         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5858         TP_EC_BACKLIGHT_MAPSW = 0x20,
5859 };
5860
5861 enum tpacpi_brightness_access_mode {
5862         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5863         TPACPI_BRGHT_MODE_EC,           /* EC control */
5864         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5865         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5866         TPACPI_BRGHT_MODE_MAX
5867 };
5868
5869 static struct backlight_device *ibm_backlight_device;
5870
5871 static enum tpacpi_brightness_access_mode brightness_mode =
5872                 TPACPI_BRGHT_MODE_MAX;
5873
5874 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5875
5876 static struct mutex brightness_mutex;
5877
5878 /* NVRAM brightness access,
5879  * call with brightness_mutex held! */
5880 static unsigned int tpacpi_brightness_nvram_get(void)
5881 {
5882         u8 lnvram;
5883
5884         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5885                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5886                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5887         lnvram &= bright_maxlvl;
5888
5889         return lnvram;
5890 }
5891
5892 static void tpacpi_brightness_checkpoint_nvram(void)
5893 {
5894         u8 lec = 0;
5895         u8 b_nvram;
5896
5897         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5898                 return;
5899
5900         vdbg_printk(TPACPI_DBG_BRGHT,
5901                 "trying to checkpoint backlight level to NVRAM...\n");
5902
5903         if (mutex_lock_killable(&brightness_mutex) < 0)
5904                 return;
5905
5906         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5907                 goto unlock;
5908         lec &= TP_EC_BACKLIGHT_LVLMSK;
5909         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5910
5911         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5912                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5913                 /* NVRAM needs update */
5914                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5915                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5916                 b_nvram |= lec;
5917                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5918                 dbg_printk(TPACPI_DBG_BRGHT,
5919                            "updated NVRAM backlight level to %u (0x%02x)\n",
5920                            (unsigned int) lec, (unsigned int) b_nvram);
5921         } else
5922                 vdbg_printk(TPACPI_DBG_BRGHT,
5923                            "NVRAM backlight level already is %u (0x%02x)\n",
5924                            (unsigned int) lec, (unsigned int) b_nvram);
5925
5926 unlock:
5927         mutex_unlock(&brightness_mutex);
5928 }
5929
5930
5931 /* call with brightness_mutex held! */
5932 static int tpacpi_brightness_get_raw(int *status)
5933 {
5934         u8 lec = 0;
5935
5936         switch (brightness_mode) {
5937         case TPACPI_BRGHT_MODE_UCMS_STEP:
5938                 *status = tpacpi_brightness_nvram_get();
5939                 return 0;
5940         case TPACPI_BRGHT_MODE_EC:
5941         case TPACPI_BRGHT_MODE_ECNVRAM:
5942                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5943                         return -EIO;
5944                 *status = lec;
5945                 return 0;
5946         default:
5947                 return -ENXIO;
5948         }
5949 }
5950
5951 /* call with brightness_mutex held! */
5952 /* do NOT call with illegal backlight level value */
5953 static int tpacpi_brightness_set_ec(unsigned int value)
5954 {
5955         u8 lec = 0;
5956
5957         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5958                 return -EIO;
5959
5960         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5961                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5962                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5963                 return -EIO;
5964
5965         return 0;
5966 }
5967
5968 /* call with brightness_mutex held! */
5969 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5970 {
5971         int cmos_cmd, inc;
5972         unsigned int current_value, i;
5973
5974         current_value = tpacpi_brightness_nvram_get();
5975
5976         if (value == current_value)
5977                 return 0;
5978
5979         cmos_cmd = (value > current_value) ?
5980                         TP_CMOS_BRIGHTNESS_UP :
5981                         TP_CMOS_BRIGHTNESS_DOWN;
5982         inc = (value > current_value) ? 1 : -1;
5983
5984         for (i = current_value; i != value; i += inc)
5985                 if (issue_thinkpad_cmos_command(cmos_cmd))
5986                         return -EIO;
5987
5988         return 0;
5989 }
5990
5991 /* May return EINTR which can always be mapped to ERESTARTSYS */
5992 static int brightness_set(unsigned int value)
5993 {
5994         int res;
5995
5996         if (value > bright_maxlvl || value < 0)
5997                 return -EINVAL;
5998
5999         vdbg_printk(TPACPI_DBG_BRGHT,
6000                         "set backlight level to %d\n", value);
6001
6002         res = mutex_lock_killable(&brightness_mutex);
6003         if (res < 0)
6004                 return res;
6005
6006         switch (brightness_mode) {
6007         case TPACPI_BRGHT_MODE_EC:
6008         case TPACPI_BRGHT_MODE_ECNVRAM:
6009                 res = tpacpi_brightness_set_ec(value);
6010                 break;
6011         case TPACPI_BRGHT_MODE_UCMS_STEP:
6012                 res = tpacpi_brightness_set_ucmsstep(value);
6013                 break;
6014         default:
6015                 res = -ENXIO;
6016         }
6017
6018         mutex_unlock(&brightness_mutex);
6019         return res;
6020 }
6021
6022 /* sysfs backlight class ----------------------------------------------- */
6023
6024 static int brightness_update_status(struct backlight_device *bd)
6025 {
6026         unsigned int level =
6027                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6028                  bd->props.power == FB_BLANK_UNBLANK) ?
6029                                 bd->props.brightness : 0;
6030
6031         dbg_printk(TPACPI_DBG_BRGHT,
6032                         "backlight: attempt to set level to %d\n",
6033                         level);
6034
6035         /* it is the backlight class's job (caller) to handle
6036          * EINTR and other errors properly */
6037         return brightness_set(level);
6038 }
6039
6040 static int brightness_get(struct backlight_device *bd)
6041 {
6042         int status, res;
6043
6044         res = mutex_lock_killable(&brightness_mutex);
6045         if (res < 0)
6046                 return 0;
6047
6048         res = tpacpi_brightness_get_raw(&status);
6049
6050         mutex_unlock(&brightness_mutex);
6051
6052         if (res < 0)
6053                 return 0;
6054
6055         return status & TP_EC_BACKLIGHT_LVLMSK;
6056 }
6057
6058 static void tpacpi_brightness_notify_change(void)
6059 {
6060         backlight_force_update(ibm_backlight_device,
6061                                BACKLIGHT_UPDATE_HOTKEY);
6062 }
6063
6064 static const struct backlight_ops ibm_backlight_data = {
6065         .get_brightness = brightness_get,
6066         .update_status  = brightness_update_status,
6067 };
6068
6069 /* --------------------------------------------------------------------- */
6070
6071 /*
6072  * Call _BCL method of video device.  On some ThinkPads this will
6073  * switch the firmware to the ACPI brightness control mode.
6074  */
6075
6076 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6077 {
6078         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6079         union acpi_object *obj;
6080         int rc;
6081
6082         if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) {
6083                 obj = (union acpi_object *)buffer.pointer;
6084                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
6085                         pr_err("Unknown _BCL data, please report this to %s\n",
6086                                TPACPI_MAIL);
6087                         rc = 0;
6088                 } else {
6089                         rc = obj->package.count;
6090                 }
6091         } else {
6092                 return 0;
6093         }
6094
6095         kfree(buffer.pointer);
6096         return rc;
6097 }
6098
6099
6100 /*
6101  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6102  */
6103 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6104 {
6105         acpi_handle video_device;
6106         int bcl_levels = 0;
6107
6108         tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device);
6109         if (video_device)
6110                 bcl_levels = tpacpi_query_bcl_levels(video_device);
6111
6112         tp_features.bright_acpimode = (bcl_levels > 0);
6113
6114         return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6115 }
6116
6117 /*
6118  * These are only useful for models that have only one possibility
6119  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6120  * these quirks.
6121  */
6122 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6123 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6124 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6125
6126 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6127         /* Models with ATI GPUs known to require ECNVRAM mode */
6128         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6129
6130         /* Models with ATI GPUs that can use ECNVRAM */
6131         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),      /* R50,51 T40-42 */
6132         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6133         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),      /* R52 */
6134         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6135
6136         /* Models with Intel Extreme Graphics 2 */
6137         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),    /* X40 */
6138         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6139         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6140
6141         /* Models with Intel GMA900 */
6142         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6143         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6144         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6145 };
6146
6147 /*
6148  * Returns < 0 for error, otherwise sets tp_features.bright_*
6149  * and bright_maxlvl.
6150  */
6151 static void __init tpacpi_detect_brightness_capabilities(void)
6152 {
6153         unsigned int b;
6154
6155         vdbg_printk(TPACPI_DBG_INIT,
6156                     "detecting firmware brightness interface capabilities\n");
6157
6158         /* we could run a quirks check here (same table used by
6159          * brightness_init) if needed */
6160
6161         /*
6162          * We always attempt to detect acpi support, so as to switch
6163          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6164          * going to publish a backlight interface
6165          */
6166         b = tpacpi_check_std_acpi_brightness_support();
6167         switch (b) {
6168         case 16:
6169                 bright_maxlvl = 15;
6170                 pr_info("detected a 16-level brightness capable ThinkPad\n");
6171                 break;
6172         case 8:
6173         case 0:
6174                 bright_maxlvl = 7;
6175                 pr_info("detected a 8-level brightness capable ThinkPad\n");
6176                 break;
6177         default:
6178                 pr_err("Unsupported brightness interface, "
6179                        "please contact %s\n", TPACPI_MAIL);
6180                 tp_features.bright_unkfw = 1;
6181                 bright_maxlvl = b - 1;
6182         }
6183 }
6184
6185 static int __init brightness_init(struct ibm_init_struct *iibm)
6186 {
6187         struct backlight_properties props;
6188         int b;
6189         unsigned long quirks;
6190
6191         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6192
6193         mutex_init(&brightness_mutex);
6194
6195         quirks = tpacpi_check_quirks(brightness_quirk_table,
6196                                 ARRAY_SIZE(brightness_quirk_table));
6197
6198         /* tpacpi_detect_brightness_capabilities() must have run already */
6199
6200         /* if it is unknown, we don't handle it: it wouldn't be safe */
6201         if (tp_features.bright_unkfw)
6202                 return 1;
6203
6204         if (!brightness_enable) {
6205                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6206                            "brightness support disabled by "
6207                            "module parameter\n");
6208                 return 1;
6209         }
6210
6211         if (acpi_video_backlight_support()) {
6212                 if (brightness_enable > 1) {
6213                         pr_info("Standard ACPI backlight interface "
6214                                 "available, not loading native one\n");
6215                         return 1;
6216                 } else if (brightness_enable == 1) {
6217                         pr_warn("Cannot enable backlight brightness support, "
6218                                 "ACPI is already handling it.  Refer to the "
6219                                 "acpi_backlight kernel parameter.\n");
6220                         return 1;
6221                 }
6222         } else if (tp_features.bright_acpimode && brightness_enable > 1) {
6223                 pr_notice("Standard ACPI backlight interface not "
6224                           "available, thinkpad_acpi native "
6225                           "brightness control enabled\n");
6226         }
6227
6228         /*
6229          * Check for module parameter bogosity, note that we
6230          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6231          * able to detect "unspecified"
6232          */
6233         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6234                 return -EINVAL;
6235
6236         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6237         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6238             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6239                 if (quirks & TPACPI_BRGHT_Q_EC)
6240                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6241                 else
6242                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6243
6244                 dbg_printk(TPACPI_DBG_BRGHT,
6245                            "driver auto-selected brightness_mode=%d\n",
6246                            brightness_mode);
6247         }
6248
6249         /* Safety */
6250         if (!tpacpi_is_ibm() &&
6251             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6252              brightness_mode == TPACPI_BRGHT_MODE_EC))
6253                 return -EINVAL;
6254
6255         if (tpacpi_brightness_get_raw(&b) < 0)
6256                 return 1;
6257
6258         memset(&props, 0, sizeof(struct backlight_properties));
6259         props.type = BACKLIGHT_PLATFORM;
6260         props.max_brightness = bright_maxlvl;
6261         props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6262         ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6263                                                          NULL, NULL,
6264                                                          &ibm_backlight_data,
6265                                                          &props);
6266         if (IS_ERR(ibm_backlight_device)) {
6267                 int rc = PTR_ERR(ibm_backlight_device);
6268                 ibm_backlight_device = NULL;
6269                 pr_err("Could not register backlight device\n");
6270                 return rc;
6271         }
6272         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6273                         "brightness is supported\n");
6274
6275         if (quirks & TPACPI_BRGHT_Q_ASK) {
6276                 pr_notice("brightness: will use unverified default: "
6277                           "brightness_mode=%d\n", brightness_mode);
6278                 pr_notice("brightness: please report to %s whether it works well "
6279                           "or not on your ThinkPad\n", TPACPI_MAIL);
6280         }
6281
6282         /* Added by mistake in early 2007.  Probably useless, but it could
6283          * be working around some unknown firmware problem where the value
6284          * read at startup doesn't match the real hardware state... so leave
6285          * it in place just in case */
6286         backlight_update_status(ibm_backlight_device);
6287
6288         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6289                         "brightness: registering brightness hotkeys "
6290                         "as change notification\n");
6291         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6292                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6293                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);
6294         return 0;
6295 }
6296
6297 static void brightness_suspend(void)
6298 {
6299         tpacpi_brightness_checkpoint_nvram();
6300 }
6301
6302 static void brightness_shutdown(void)
6303 {
6304         tpacpi_brightness_checkpoint_nvram();
6305 }
6306
6307 static void brightness_exit(void)
6308 {
6309         if (ibm_backlight_device) {
6310                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6311                             "calling backlight_device_unregister()\n");
6312                 backlight_device_unregister(ibm_backlight_device);
6313         }
6314
6315         tpacpi_brightness_checkpoint_nvram();
6316 }
6317
6318 static int brightness_read(struct seq_file *m)
6319 {
6320         int level;
6321
6322         level = brightness_get(NULL);
6323         if (level < 0) {
6324                 seq_printf(m, "level:\t\tunreadable\n");
6325         } else {
6326                 seq_printf(m, "level:\t\t%d\n", level);
6327                 seq_printf(m, "commands:\tup, down\n");
6328                 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6329                                bright_maxlvl);
6330         }
6331
6332         return 0;
6333 }
6334
6335 static int brightness_write(char *buf)
6336 {
6337         int level;
6338         int rc;
6339         char *cmd;
6340
6341         level = brightness_get(NULL);
6342         if (level < 0)
6343                 return level;
6344
6345         while ((cmd = next_cmd(&buf))) {
6346                 if (strlencmp(cmd, "up") == 0) {
6347                         if (level < bright_maxlvl)
6348                                 level++;
6349                 } else if (strlencmp(cmd, "down") == 0) {
6350                         if (level > 0)
6351                                 level--;
6352                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6353                            level >= 0 && level <= bright_maxlvl) {
6354                         /* new level set */
6355                 } else
6356                         return -EINVAL;
6357         }
6358
6359         tpacpi_disclose_usertask("procfs brightness",
6360                         "set level to %d\n", level);
6361
6362         /*
6363          * Now we know what the final level should be, so we try to set it.
6364          * Doing it this way makes the syscall restartable in case of EINTR
6365          */
6366         rc = brightness_set(level);
6367         if (!rc && ibm_backlight_device)
6368                 backlight_force_update(ibm_backlight_device,
6369                                         BACKLIGHT_UPDATE_SYSFS);
6370         return (rc == -EINTR)? -ERESTARTSYS : rc;
6371 }
6372
6373 static struct ibm_struct brightness_driver_data = {
6374         .name = "brightness",
6375         .read = brightness_read,
6376         .write = brightness_write,
6377         .exit = brightness_exit,
6378         .suspend = brightness_suspend,
6379         .shutdown = brightness_shutdown,
6380 };
6381
6382 /*************************************************************************
6383  * Volume subdriver
6384  */
6385
6386 /*
6387  * IBM ThinkPads have a simple volume controller with MUTE gating.
6388  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6389  *
6390  * Since the *61 series (and probably also the later *60 series), Lenovo
6391  * ThinkPads only implement the MUTE gate.
6392  *
6393  * EC register 0x30
6394  *   Bit 6: MUTE (1 mutes sound)
6395  *   Bit 3-0: Volume
6396  *   Other bits should be zero as far as we know.
6397  *
6398  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6399  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6400  * such as bit 7 which is used to detect repeated presses of MUTE,
6401  * and we leave them unchanged.
6402  */
6403
6404 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
6405
6406 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
6407 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6408 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6409
6410 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
6411 static char *alsa_id = "ThinkPadEC";
6412 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
6413
6414 struct tpacpi_alsa_data {
6415         struct snd_card *card;
6416         struct snd_ctl_elem_id *ctl_mute_id;
6417         struct snd_ctl_elem_id *ctl_vol_id;
6418 };
6419
6420 static struct snd_card *alsa_card;
6421
6422 enum {
6423         TP_EC_AUDIO = 0x30,
6424
6425         /* TP_EC_AUDIO bits */
6426         TP_EC_AUDIO_MUTESW = 6,
6427
6428         /* TP_EC_AUDIO bitmasks */
6429         TP_EC_AUDIO_LVL_MSK = 0x0F,
6430         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6431
6432         /* Maximum volume */
6433         TP_EC_VOLUME_MAX = 14,
6434 };
6435
6436 enum tpacpi_volume_access_mode {
6437         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6438         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6439         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6440         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6441         TPACPI_VOL_MODE_MAX
6442 };
6443
6444 enum tpacpi_volume_capabilities {
6445         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6446         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6447         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6448         TPACPI_VOL_CAP_MAX
6449 };
6450
6451 static enum tpacpi_volume_access_mode volume_mode =
6452         TPACPI_VOL_MODE_MAX;
6453
6454 static enum tpacpi_volume_capabilities volume_capabilities;
6455 static bool volume_control_allowed;
6456
6457 /*
6458  * Used to syncronize writers to TP_EC_AUDIO and
6459  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6460  */
6461 static struct mutex volume_mutex;
6462
6463 static void tpacpi_volume_checkpoint_nvram(void)
6464 {
6465         u8 lec = 0;
6466         u8 b_nvram;
6467         u8 ec_mask;
6468
6469         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6470                 return;
6471         if (!volume_control_allowed)
6472                 return;
6473
6474         vdbg_printk(TPACPI_DBG_MIXER,
6475                 "trying to checkpoint mixer state to NVRAM...\n");
6476
6477         if (tp_features.mixer_no_level_control)
6478                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6479         else
6480                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6481
6482         if (mutex_lock_killable(&volume_mutex) < 0)
6483                 return;
6484
6485         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6486                 goto unlock;
6487         lec &= ec_mask;
6488         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6489
6490         if (lec != (b_nvram & ec_mask)) {
6491                 /* NVRAM needs update */
6492                 b_nvram &= ~ec_mask;
6493                 b_nvram |= lec;
6494                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6495                 dbg_printk(TPACPI_DBG_MIXER,
6496                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6497                            (unsigned int) lec, (unsigned int) b_nvram);
6498         } else {
6499                 vdbg_printk(TPACPI_DBG_MIXER,
6500                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6501                            (unsigned int) lec, (unsigned int) b_nvram);
6502         }
6503
6504 unlock:
6505         mutex_unlock(&volume_mutex);
6506 }
6507
6508 static int volume_get_status_ec(u8 *status)
6509 {
6510         u8 s;
6511
6512         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6513                 return -EIO;
6514
6515         *status = s;
6516
6517         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6518
6519         return 0;
6520 }
6521
6522 static int volume_get_status(u8 *status)
6523 {
6524         return volume_get_status_ec(status);
6525 }
6526
6527 static int volume_set_status_ec(const u8 status)
6528 {
6529         if (!acpi_ec_write(TP_EC_AUDIO, status))
6530                 return -EIO;
6531
6532         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6533
6534         return 0;
6535 }
6536
6537 static int volume_set_status(const u8 status)
6538 {
6539         return volume_set_status_ec(status);
6540 }
6541
6542 /* returns < 0 on error, 0 on no change, 1 on change */
6543 static int __volume_set_mute_ec(const bool mute)
6544 {
6545         int rc;
6546         u8 s, n;
6547
6548         if (mutex_lock_killable(&volume_mutex) < 0)
6549                 return -EINTR;
6550
6551         rc = volume_get_status_ec(&s);
6552         if (rc)
6553                 goto unlock;
6554
6555         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6556                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6557
6558         if (n != s) {
6559                 rc = volume_set_status_ec(n);
6560                 if (!rc)
6561                         rc = 1;
6562         }
6563
6564 unlock:
6565         mutex_unlock(&volume_mutex);
6566         return rc;
6567 }
6568
6569 static int volume_alsa_set_mute(const bool mute)
6570 {
6571         dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
6572                    (mute) ? "" : "un");
6573         return __volume_set_mute_ec(mute);
6574 }
6575
6576 static int volume_set_mute(const bool mute)
6577 {
6578         int rc;
6579
6580         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6581                    (mute) ? "" : "un");
6582
6583         rc = __volume_set_mute_ec(mute);
6584         return (rc < 0) ? rc : 0;
6585 }
6586
6587 /* returns < 0 on error, 0 on no change, 1 on change */
6588 static int __volume_set_volume_ec(const u8 vol)
6589 {
6590         int rc;
6591         u8 s, n;
6592
6593         if (vol > TP_EC_VOLUME_MAX)
6594                 return -EINVAL;
6595
6596         if (mutex_lock_killable(&volume_mutex) < 0)
6597                 return -EINTR;
6598
6599         rc = volume_get_status_ec(&s);
6600         if (rc)
6601                 goto unlock;
6602
6603         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6604
6605         if (n != s) {
6606                 rc = volume_set_status_ec(n);
6607                 if (!rc)
6608                         rc = 1;
6609         }
6610
6611 unlock:
6612         mutex_unlock(&volume_mutex);
6613         return rc;
6614 }
6615
6616 static int volume_alsa_set_volume(const u8 vol)
6617 {
6618         dbg_printk(TPACPI_DBG_MIXER,
6619                    "ALSA: trying to set volume level to %hu\n", vol);
6620         return __volume_set_volume_ec(vol);
6621 }
6622
6623 static void volume_alsa_notify_change(void)
6624 {
6625         struct tpacpi_alsa_data *d;
6626
6627         if (alsa_card && alsa_card->private_data) {
6628                 d = alsa_card->private_data;
6629                 if (d->ctl_mute_id)
6630                         snd_ctl_notify(alsa_card,
6631                                         SNDRV_CTL_EVENT_MASK_VALUE,
6632                                         d->ctl_mute_id);
6633                 if (d->ctl_vol_id)
6634                         snd_ctl_notify(alsa_card,
6635                                         SNDRV_CTL_EVENT_MASK_VALUE,
6636                                         d->ctl_vol_id);
6637         }
6638 }
6639
6640 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6641                                 struct snd_ctl_elem_info *uinfo)
6642 {
6643         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6644         uinfo->count = 1;
6645         uinfo->value.integer.min = 0;
6646         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6647         return 0;
6648 }
6649
6650 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6651                                 struct snd_ctl_elem_value *ucontrol)
6652 {
6653         u8 s;
6654         int rc;
6655
6656         rc = volume_get_status(&s);
6657         if (rc < 0)
6658                 return rc;
6659
6660         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6661         return 0;
6662 }
6663
6664 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6665                                 struct snd_ctl_elem_value *ucontrol)
6666 {
6667         tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
6668                                  ucontrol->value.integer.value[0]);
6669         return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
6670 }
6671
6672 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6673
6674 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6675                                 struct snd_ctl_elem_value *ucontrol)
6676 {
6677         u8 s;
6678         int rc;
6679
6680         rc = volume_get_status(&s);
6681         if (rc < 0)
6682                 return rc;
6683
6684         ucontrol->value.integer.value[0] =
6685                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6686         return 0;
6687 }
6688
6689 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6690                                 struct snd_ctl_elem_value *ucontrol)
6691 {
6692         tpacpi_disclose_usertask("ALSA", "%smute\n",
6693                                  ucontrol->value.integer.value[0] ?
6694                                         "un" : "");
6695         return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
6696 }
6697
6698 static struct snd_kcontrol_new volume_alsa_control_vol = {
6699         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6700         .name = "Console Playback Volume",
6701         .index = 0,
6702         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6703         .info = volume_alsa_vol_info,
6704         .get = volume_alsa_vol_get,
6705 };
6706
6707 static struct snd_kcontrol_new volume_alsa_control_mute = {
6708         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6709         .name = "Console Playback Switch",
6710         .index = 0,
6711         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6712         .info = volume_alsa_mute_info,
6713         .get = volume_alsa_mute_get,
6714 };
6715
6716 static void volume_suspend(void)
6717 {
6718         tpacpi_volume_checkpoint_nvram();
6719 }
6720
6721 static void volume_resume(void)
6722 {
6723         volume_alsa_notify_change();
6724 }
6725
6726 static void volume_shutdown(void)
6727 {
6728         tpacpi_volume_checkpoint_nvram();
6729 }
6730
6731 static void volume_exit(void)
6732 {
6733         if (alsa_card) {
6734                 snd_card_free(alsa_card);
6735                 alsa_card = NULL;
6736         }
6737
6738         tpacpi_volume_checkpoint_nvram();
6739 }
6740
6741 static int __init volume_create_alsa_mixer(void)
6742 {
6743         struct snd_card *card;
6744         struct tpacpi_alsa_data *data;
6745         struct snd_kcontrol *ctl_vol;
6746         struct snd_kcontrol *ctl_mute;
6747         int rc;
6748
6749         rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6750                             sizeof(struct tpacpi_alsa_data), &card);
6751         if (rc < 0 || !card) {
6752                 pr_err("Failed to create ALSA card structures: %d\n", rc);
6753                 return 1;
6754         }
6755
6756         BUG_ON(!card->private_data);
6757         data = card->private_data;
6758         data->card = card;
6759
6760         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6761                 sizeof(card->driver));
6762         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6763                 sizeof(card->shortname));
6764         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6765                  (thinkpad_id.ec_version_str) ?
6766                         thinkpad_id.ec_version_str : "(unknown)");
6767         snprintf(card->longname, sizeof(card->longname),
6768                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6769                  (thinkpad_id.ec_version_str) ?
6770                         thinkpad_id.ec_version_str : "unknown");
6771
6772         if (volume_control_allowed) {
6773                 volume_alsa_control_vol.put = volume_alsa_vol_put;
6774                 volume_alsa_control_vol.access =
6775                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6776
6777                 volume_alsa_control_mute.put = volume_alsa_mute_put;
6778                 volume_alsa_control_mute.access =
6779                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6780         }
6781
6782         if (!tp_features.mixer_no_level_control) {
6783                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6784                 rc = snd_ctl_add(card, ctl_vol);
6785                 if (rc < 0) {
6786                         pr_err("Failed to create ALSA volume control: %d\n",
6787                                rc);
6788                         goto err_exit;
6789                 }
6790                 data->ctl_vol_id = &ctl_vol->id;
6791         }
6792
6793         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6794         rc = snd_ctl_add(card, ctl_mute);
6795         if (rc < 0) {
6796                 pr_err("Failed to create ALSA mute control: %d\n", rc);
6797                 goto err_exit;
6798         }
6799         data->ctl_mute_id = &ctl_mute->id;
6800
6801         snd_card_set_dev(card, &tpacpi_pdev->dev);
6802         rc = snd_card_register(card);
6803         if (rc < 0) {
6804                 pr_err("Failed to register ALSA card: %d\n", rc);
6805                 goto err_exit;
6806         }
6807
6808         alsa_card = card;
6809         return 0;
6810
6811 err_exit:
6812         snd_card_free(card);
6813         return 1;
6814 }
6815
6816 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
6817 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
6818
6819 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6820         /* Whitelist volume level on all IBM by default */
6821         { .vendor = PCI_VENDOR_ID_IBM,
6822           .bios   = TPACPI_MATCH_ANY,
6823           .ec     = TPACPI_MATCH_ANY,
6824           .quirks = TPACPI_VOL_Q_LEVEL },
6825
6826         /* Lenovo models with volume control (needs confirmation) */
6827         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6828         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6829         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6830         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6831         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6832         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6833         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6834
6835         /* Whitelist mute-only on all Lenovo by default */
6836         { .vendor = PCI_VENDOR_ID_LENOVO,
6837           .bios   = TPACPI_MATCH_ANY,
6838           .ec     = TPACPI_MATCH_ANY,
6839           .quirks = TPACPI_VOL_Q_MUTEONLY }
6840 };
6841
6842 static int __init volume_init(struct ibm_init_struct *iibm)
6843 {
6844         unsigned long quirks;
6845         int rc;
6846
6847         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6848
6849         mutex_init(&volume_mutex);
6850
6851         /*
6852          * Check for module parameter bogosity, note that we
6853          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6854          * able to detect "unspecified"
6855          */
6856         if (volume_mode > TPACPI_VOL_MODE_MAX)
6857                 return -EINVAL;
6858
6859         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6860                 pr_err("UCMS step volume mode not implemented, "
6861                        "please contact %s\n", TPACPI_MAIL);
6862                 return 1;
6863         }
6864
6865         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6866                 return -EINVAL;
6867
6868         /*
6869          * The ALSA mixer is our primary interface.
6870          * When disabled, don't install the subdriver at all
6871          */
6872         if (!alsa_enable) {
6873                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6874                             "ALSA mixer disabled by parameter, "
6875                             "not loading volume subdriver...\n");
6876                 return 1;
6877         }
6878
6879         quirks = tpacpi_check_quirks(volume_quirk_table,
6880                                      ARRAY_SIZE(volume_quirk_table));
6881
6882         switch (volume_capabilities) {
6883         case TPACPI_VOL_CAP_AUTO:
6884                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6885                         tp_features.mixer_no_level_control = 1;
6886                 else if (quirks & TPACPI_VOL_Q_LEVEL)
6887                         tp_features.mixer_no_level_control = 0;
6888                 else
6889                         return 1; /* no mixer */
6890                 break;
6891         case TPACPI_VOL_CAP_VOLMUTE:
6892                 tp_features.mixer_no_level_control = 0;
6893                 break;
6894         case TPACPI_VOL_CAP_MUTEONLY:
6895                 tp_features.mixer_no_level_control = 1;
6896                 break;
6897         default:
6898                 return 1;
6899         }
6900
6901         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6902                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6903                                 "using user-supplied volume_capabilities=%d\n",
6904                                 volume_capabilities);
6905
6906         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6907             volume_mode == TPACPI_VOL_MODE_MAX) {
6908                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6909
6910                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6911                                 "driver auto-selected volume_mode=%d\n",
6912                                 volume_mode);
6913         } else {
6914                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6915                                 "using user-supplied volume_mode=%d\n",
6916                                 volume_mode);
6917         }
6918
6919         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6920                         "mute is supported, volume control is %s\n",
6921                         str_supported(!tp_features.mixer_no_level_control));
6922
6923         rc = volume_create_alsa_mixer();
6924         if (rc) {
6925                 pr_err("Could not create the ALSA mixer interface\n");
6926                 return rc;
6927         }
6928
6929         pr_info("Console audio control enabled, mode: %s\n",
6930                 (volume_control_allowed) ?
6931                         "override (read/write)" :
6932                         "monitor (read only)");
6933
6934         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6935                 "registering volume hotkeys as change notification\n");
6936         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6937                         | TP_ACPI_HKEY_VOLUP_MASK
6938                         | TP_ACPI_HKEY_VOLDWN_MASK
6939                         | TP_ACPI_HKEY_MUTE_MASK);
6940
6941         return 0;
6942 }
6943
6944 static int volume_read(struct seq_file *m)
6945 {
6946         u8 status;
6947
6948         if (volume_get_status(&status) < 0) {
6949                 seq_printf(m, "level:\t\tunreadable\n");
6950         } else {
6951                 if (tp_features.mixer_no_level_control)
6952                         seq_printf(m, "level:\t\tunsupported\n");
6953                 else
6954                         seq_printf(m, "level:\t\t%d\n",
6955                                         status & TP_EC_AUDIO_LVL_MSK);
6956
6957                 seq_printf(m, "mute:\t\t%s\n",
6958                                 onoff(status, TP_EC_AUDIO_MUTESW));
6959
6960                 if (volume_control_allowed) {
6961                         seq_printf(m, "commands:\tunmute, mute\n");
6962                         if (!tp_features.mixer_no_level_control) {
6963                                 seq_printf(m,
6964                                                "commands:\tup, down\n");
6965                                 seq_printf(m,
6966                                                "commands:\tlevel <level>"
6967                                                " (<level> is 0-%d)\n",
6968                                                TP_EC_VOLUME_MAX);
6969                         }
6970                 }
6971         }
6972
6973         return 0;
6974 }
6975
6976 static int volume_write(char *buf)
6977 {
6978         u8 s;
6979         u8 new_level, new_mute;
6980         int l;
6981         char *cmd;
6982         int rc;
6983
6984         /*
6985          * We do allow volume control at driver startup, so that the
6986          * user can set initial state through the volume=... parameter hack.
6987          */
6988         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6989                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6990                         tp_warned.volume_ctrl_forbidden = 1;
6991                         pr_notice("Console audio control in monitor mode, "
6992                                   "changes are not allowed\n");
6993                         pr_notice("Use the volume_control=1 module parameter "
6994                                   "to enable volume control\n");
6995                 }
6996                 return -EPERM;
6997         }
6998
6999         rc = volume_get_status(&s);
7000         if (rc < 0)
7001                 return rc;
7002
7003         new_level = s & TP_EC_AUDIO_LVL_MSK;
7004         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7005
7006         while ((cmd = next_cmd(&buf))) {
7007                 if (!tp_features.mixer_no_level_control) {
7008                         if (strlencmp(cmd, "up") == 0) {
7009                                 if (new_mute)
7010                                         new_mute = 0;
7011                                 else if (new_level < TP_EC_VOLUME_MAX)
7012                                         new_level++;
7013                                 continue;
7014                         } else if (strlencmp(cmd, "down") == 0) {
7015                                 if (new_mute)
7016                                         new_mute = 0;
7017                                 else if (new_level > 0)
7018                                         new_level--;
7019                                 continue;
7020                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
7021                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
7022                                         new_level = l;
7023                                 continue;
7024                         }
7025                 }
7026                 if (strlencmp(cmd, "mute") == 0)
7027                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
7028                 else if (strlencmp(cmd, "unmute") == 0)
7029                         new_mute = 0;
7030                 else
7031                         return -EINVAL;
7032         }
7033
7034         if (tp_features.mixer_no_level_control) {
7035                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
7036                                         new_mute ? "" : "un");
7037                 rc = volume_set_mute(!!new_mute);
7038         } else {
7039                 tpacpi_disclose_usertask("procfs volume",
7040                                         "%smute and set level to %d\n",
7041                                         new_mute ? "" : "un", new_level);
7042                 rc = volume_set_status(new_mute | new_level);
7043         }
7044         volume_alsa_notify_change();
7045
7046         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7047 }
7048
7049 static struct ibm_struct volume_driver_data = {
7050         .name = "volume",
7051         .read = volume_read,
7052         .write = volume_write,
7053         .exit = volume_exit,
7054         .suspend = volume_suspend,
7055         .resume = volume_resume,
7056         .shutdown = volume_shutdown,
7057 };
7058
7059 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7060
7061 #define alsa_card NULL
7062
7063 static void inline volume_alsa_notify_change(void)
7064 {
7065 }
7066
7067 static int __init volume_init(struct ibm_init_struct *iibm)
7068 {
7069         pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7070
7071         return 1;
7072 }
7073
7074 static struct ibm_struct volume_driver_data = {
7075         .name = "volume",
7076 };
7077
7078 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7079
7080 /*************************************************************************
7081  * Fan subdriver
7082  */
7083
7084 /*
7085  * FAN ACCESS MODES
7086  *
7087  * TPACPI_FAN_RD_ACPI_GFAN:
7088  *      ACPI GFAN method: returns fan level
7089  *
7090  *      see TPACPI_FAN_WR_ACPI_SFAN
7091  *      EC 0x2f (HFSP) not available if GFAN exists
7092  *
7093  * TPACPI_FAN_WR_ACPI_SFAN:
7094  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7095  *
7096  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7097  *      it for writing.
7098  *
7099  * TPACPI_FAN_WR_TPEC:
7100  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7101  *      Supported on almost all ThinkPads
7102  *
7103  *      Fan speed changes of any sort (including those caused by the
7104  *      disengaged mode) are usually done slowly by the firmware as the
7105  *      maximum amount of fan duty cycle change per second seems to be
7106  *      limited.
7107  *
7108  *      Reading is not available if GFAN exists.
7109  *      Writing is not available if SFAN exists.
7110  *
7111  *      Bits
7112  *       7      automatic mode engaged;
7113  *              (default operation mode of the ThinkPad)
7114  *              fan level is ignored in this mode.
7115  *       6      full speed mode (takes precedence over bit 7);
7116  *              not available on all thinkpads.  May disable
7117  *              the tachometer while the fan controller ramps up
7118  *              the speed (which can take up to a few *minutes*).
7119  *              Speeds up fan to 100% duty-cycle, which is far above
7120  *              the standard RPM levels.  It is not impossible that
7121  *              it could cause hardware damage.
7122  *      5-3     unused in some models.  Extra bits for fan level
7123  *              in others, but still useless as all values above
7124  *              7 map to the same speed as level 7 in these models.
7125  *      2-0     fan level (0..7 usually)
7126  *                      0x00 = stop
7127  *                      0x07 = max (set when temperatures critical)
7128  *              Some ThinkPads may have other levels, see
7129  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7130  *
7131  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7132  *      boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7133  *      does so, its initial value is meaningless (0x07).
7134  *
7135  *      For firmware bugs, refer to:
7136  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7137  *
7138  *      ----
7139  *
7140  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7141  *      Main fan tachometer reading (in RPM)
7142  *
7143  *      This register is present on all ThinkPads with a new-style EC, and
7144  *      it is known not to be present on the A21m/e, and T22, as there is
7145  *      something else in offset 0x84 according to the ACPI DSDT.  Other
7146  *      ThinkPads from this same time period (and earlier) probably lack the
7147  *      tachometer as well.
7148  *
7149  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7150  *      was never fixed by IBM to report the EC firmware version string
7151  *      probably support the tachometer (like the early X models), so
7152  *      detecting it is quite hard.  We need more data to know for sure.
7153  *
7154  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7155  *      might result.
7156  *
7157  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
7158  *      mode.
7159  *
7160  *      For firmware bugs, refer to:
7161  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7162  *
7163  *      ----
7164  *
7165  *      ThinkPad EC register 0x31 bit 0 (only on select models)
7166  *
7167  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
7168  *      show the speed of the main fan.  When bit 0 of EC register 0x31
7169  *      is one, the tachometer registers show the speed of the auxiliary
7170  *      fan.
7171  *
7172  *      Fan control seems to affect both fans, regardless of the state
7173  *      of this bit.
7174  *
7175  *      So far, only the firmware for the X60/X61 non-tablet versions
7176  *      seem to support this (firmware TP-7M).
7177  *
7178  * TPACPI_FAN_WR_ACPI_FANS:
7179  *      ThinkPad X31, X40, X41.  Not available in the X60.
7180  *
7181  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
7182  *      high speed.  ACPI DSDT seems to map these three speeds to levels
7183  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7184  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7185  *
7186  *      The speeds are stored on handles
7187  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7188  *
7189  *      There are three default speed sets, accessible as handles:
7190  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7191  *
7192  *      ACPI DSDT switches which set is in use depending on various
7193  *      factors.
7194  *
7195  *      TPACPI_FAN_WR_TPEC is also available and should be used to
7196  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7197  *      but the ACPI tables just mention level 7.
7198  */
7199
7200 enum {                                  /* Fan control constants */
7201         fan_status_offset = 0x2f,       /* EC register 0x2f */
7202         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
7203                                          * 0x84 must be read before 0x85 */
7204         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
7205                                            bit 0 selects which fan is active */
7206
7207         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
7208         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
7209
7210         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
7211 };
7212
7213 enum fan_status_access_mode {
7214         TPACPI_FAN_NONE = 0,            /* No fan status or control */
7215         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
7216         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7217 };
7218
7219 enum fan_control_access_mode {
7220         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
7221         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
7222         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
7223         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
7224 };
7225
7226 enum fan_control_commands {
7227         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
7228         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
7229         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
7230                                                  * and also watchdog cmd */
7231 };
7232
7233 static bool fan_control_allowed;
7234
7235 static enum fan_status_access_mode fan_status_access_mode;
7236 static enum fan_control_access_mode fan_control_access_mode;
7237 static enum fan_control_commands fan_control_commands;
7238
7239 static u8 fan_control_initial_status;
7240 static u8 fan_control_desired_level;
7241 static u8 fan_control_resume_level;
7242 static int fan_watchdog_maxinterval;
7243
7244 static struct mutex fan_mutex;
7245
7246 static void fan_watchdog_fire(struct work_struct *ignored);
7247 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7248
7249 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
7250 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7251            "\\FSPD",            /* 600e/x, 770e, 770x */
7252            );                   /* all others */
7253 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7254            "JFNS",              /* 770x-JL */
7255            );                   /* all others */
7256
7257 /*
7258  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7259  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7260  * be in auto mode (0x80).
7261  *
7262  * This is corrected by any write to HFSP either by the driver, or
7263  * by the firmware.
7264  *
7265  * We assume 0x07 really means auto mode while this quirk is active,
7266  * as this is far more likely than the ThinkPad being in level 7,
7267  * which is only used by the firmware during thermal emergencies.
7268  *
7269  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7270  * TP-70 (T43, R52), which are known to be buggy.
7271  */
7272
7273 static void fan_quirk1_setup(void)
7274 {
7275         if (fan_control_initial_status == 0x07) {
7276                 pr_notice("fan_init: initial fan status is unknown, "
7277                           "assuming it is in auto mode\n");
7278                 tp_features.fan_ctrl_status_undef = 1;
7279         }
7280 }
7281
7282 static void fan_quirk1_handle(u8 *fan_status)
7283 {
7284         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7285                 if (*fan_status != fan_control_initial_status) {
7286                         /* something changed the HFSP regisnter since
7287                          * driver init time, so it is not undefined
7288                          * anymore */
7289                         tp_features.fan_ctrl_status_undef = 0;
7290                 } else {
7291                         /* Return most likely status. In fact, it
7292                          * might be the only possible status */
7293                         *fan_status = TP_EC_FAN_AUTO;
7294                 }
7295         }
7296 }
7297
7298 /* Select main fan on X60/X61, NOOP on others */
7299 static bool fan_select_fan1(void)
7300 {
7301         if (tp_features.second_fan) {
7302                 u8 val;
7303
7304                 if (ec_read(fan_select_offset, &val) < 0)
7305                         return false;
7306                 val &= 0xFEU;
7307                 if (ec_write(fan_select_offset, val) < 0)
7308                         return false;
7309         }
7310         return true;
7311 }
7312
7313 /* Select secondary fan on X60/X61 */
7314 static bool fan_select_fan2(void)
7315 {
7316         u8 val;
7317
7318         if (!tp_features.second_fan)
7319                 return false;
7320
7321         if (ec_read(fan_select_offset, &val) < 0)
7322                 return false;
7323         val |= 0x01U;
7324         if (ec_write(fan_select_offset, val) < 0)
7325                 return false;
7326
7327         return true;
7328 }
7329
7330 /*
7331  * Call with fan_mutex held
7332  */
7333 static void fan_update_desired_level(u8 status)
7334 {
7335         if ((status &
7336              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7337                 if (status > 7)
7338                         fan_control_desired_level = 7;
7339                 else
7340                         fan_control_desired_level = status;
7341         }
7342 }
7343
7344 static int fan_get_status(u8 *status)
7345 {
7346         u8 s;
7347
7348         /* TODO:
7349          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7350
7351         switch (fan_status_access_mode) {
7352         case TPACPI_FAN_RD_ACPI_GFAN: {
7353                 /* 570, 600e/x, 770e, 770x */
7354                 int res;
7355
7356                 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
7357                         return -EIO;
7358
7359                 if (likely(status))
7360                         *status = res & 0x07;
7361
7362                 break;
7363         }
7364         case TPACPI_FAN_RD_TPEC:
7365                 /* all except 570, 600e/x, 770e, 770x */
7366                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7367                         return -EIO;
7368
7369                 if (likely(status)) {
7370                         *status = s;
7371                         fan_quirk1_handle(status);
7372                 }
7373
7374                 break;
7375
7376         default:
7377                 return -ENXIO;
7378         }
7379
7380         return 0;
7381 }
7382
7383 static int fan_get_status_safe(u8 *status)
7384 {
7385         int rc;
7386         u8 s;
7387
7388         if (mutex_lock_killable(&fan_mutex))
7389                 return -ERESTARTSYS;
7390         rc = fan_get_status(&s);
7391         if (!rc)
7392                 fan_update_desired_level(s);
7393         mutex_unlock(&fan_mutex);
7394
7395         if (status)
7396                 *status = s;
7397
7398         return rc;
7399 }
7400
7401 static int fan_get_speed(unsigned int *speed)
7402 {
7403         u8 hi, lo;
7404
7405         switch (fan_status_access_mode) {
7406         case TPACPI_FAN_RD_TPEC:
7407                 /* all except 570, 600e/x, 770e, 770x */
7408                 if (unlikely(!fan_select_fan1()))
7409                         return -EIO;
7410                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7411                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7412                         return -EIO;
7413
7414                 if (likely(speed))
7415                         *speed = (hi << 8) | lo;
7416
7417                 break;
7418
7419         default:
7420                 return -ENXIO;
7421         }
7422
7423         return 0;
7424 }
7425
7426 static int fan2_get_speed(unsigned int *speed)
7427 {
7428         u8 hi, lo;
7429         bool rc;
7430
7431         switch (fan_status_access_mode) {
7432         case TPACPI_FAN_RD_TPEC:
7433                 /* all except 570, 600e/x, 770e, 770x */
7434                 if (unlikely(!fan_select_fan2()))
7435                         return -EIO;
7436                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7437                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7438                 fan_select_fan1(); /* play it safe */
7439                 if (rc)
7440                         return -EIO;
7441
7442                 if (likely(speed))
7443                         *speed = (hi << 8) | lo;
7444
7445                 break;
7446
7447         default:
7448                 return -ENXIO;
7449         }
7450
7451         return 0;
7452 }
7453
7454 static int fan_set_level(int level)
7455 {
7456         if (!fan_control_allowed)
7457                 return -EPERM;
7458
7459         switch (fan_control_access_mode) {
7460         case TPACPI_FAN_WR_ACPI_SFAN:
7461                 if (level >= 0 && level <= 7) {
7462                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7463                                 return -EIO;
7464                 } else
7465                         return -EINVAL;
7466                 break;
7467
7468         case TPACPI_FAN_WR_ACPI_FANS:
7469         case TPACPI_FAN_WR_TPEC:
7470                 if (!(level & TP_EC_FAN_AUTO) &&
7471                     !(level & TP_EC_FAN_FULLSPEED) &&
7472                     ((level < 0) || (level > 7)))
7473                         return -EINVAL;
7474
7475                 /* safety net should the EC not support AUTO
7476                  * or FULLSPEED mode bits and just ignore them */
7477                 if (level & TP_EC_FAN_FULLSPEED)
7478                         level |= 7;     /* safety min speed 7 */
7479                 else if (level & TP_EC_FAN_AUTO)
7480                         level |= 4;     /* safety min speed 4 */
7481
7482                 if (!acpi_ec_write(fan_status_offset, level))
7483                         return -EIO;
7484                 else
7485                         tp_features.fan_ctrl_status_undef = 0;
7486                 break;
7487
7488         default:
7489                 return -ENXIO;
7490         }
7491
7492         vdbg_printk(TPACPI_DBG_FAN,
7493                 "fan control: set fan control register to 0x%02x\n", level);
7494         return 0;
7495 }
7496
7497 static int fan_set_level_safe(int level)
7498 {
7499         int rc;
7500
7501         if (!fan_control_allowed)
7502                 return -EPERM;
7503
7504         if (mutex_lock_killable(&fan_mutex))
7505                 return -ERESTARTSYS;
7506
7507         if (level == TPACPI_FAN_LAST_LEVEL)
7508                 level = fan_control_desired_level;
7509
7510         rc = fan_set_level(level);
7511         if (!rc)
7512                 fan_update_desired_level(level);
7513
7514         mutex_unlock(&fan_mutex);
7515         return rc;
7516 }
7517
7518 static int fan_set_enable(void)
7519 {
7520         u8 s;
7521         int rc;
7522
7523         if (!fan_control_allowed)
7524                 return -EPERM;
7525
7526         if (mutex_lock_killable(&fan_mutex))
7527                 return -ERESTARTSYS;
7528
7529         switch (fan_control_access_mode) {
7530         case TPACPI_FAN_WR_ACPI_FANS:
7531         case TPACPI_FAN_WR_TPEC:
7532                 rc = fan_get_status(&s);
7533                 if (rc < 0)
7534                         break;
7535
7536                 /* Don't go out of emergency fan mode */
7537                 if (s != 7) {
7538                         s &= 0x07;
7539                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7540                 }
7541
7542                 if (!acpi_ec_write(fan_status_offset, s))
7543                         rc = -EIO;
7544                 else {
7545                         tp_features.fan_ctrl_status_undef = 0;
7546                         rc = 0;
7547                 }
7548                 break;
7549
7550         case TPACPI_FAN_WR_ACPI_SFAN:
7551                 rc = fan_get_status(&s);
7552                 if (rc < 0)
7553                         break;
7554
7555                 s &= 0x07;
7556
7557                 /* Set fan to at least level 4 */
7558                 s |= 4;
7559
7560                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7561                         rc = -EIO;
7562                 else
7563                         rc = 0;
7564                 break;
7565
7566         default:
7567                 rc = -ENXIO;
7568         }
7569
7570         mutex_unlock(&fan_mutex);
7571
7572         if (!rc)
7573                 vdbg_printk(TPACPI_DBG_FAN,
7574                         "fan control: set fan control register to 0x%02x\n",
7575                         s);
7576         return rc;
7577 }
7578
7579 static int fan_set_disable(void)
7580 {
7581         int rc;
7582
7583         if (!fan_control_allowed)
7584                 return -EPERM;
7585
7586         if (mutex_lock_killable(&fan_mutex))
7587                 return -ERESTARTSYS;
7588
7589         rc = 0;
7590         switch (fan_control_access_mode) {
7591         case TPACPI_FAN_WR_ACPI_FANS:
7592         case TPACPI_FAN_WR_TPEC:
7593                 if (!acpi_ec_write(fan_status_offset, 0x00))
7594                         rc = -EIO;
7595                 else {
7596                         fan_control_desired_level = 0;
7597                         tp_features.fan_ctrl_status_undef = 0;
7598                 }
7599                 break;
7600
7601         case TPACPI_FAN_WR_ACPI_SFAN:
7602                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7603                         rc = -EIO;
7604                 else
7605                         fan_control_desired_level = 0;
7606                 break;
7607
7608         default:
7609                 rc = -ENXIO;
7610         }
7611
7612         if (!rc)
7613                 vdbg_printk(TPACPI_DBG_FAN,
7614                         "fan control: set fan control register to 0\n");
7615
7616         mutex_unlock(&fan_mutex);
7617         return rc;
7618 }
7619
7620 static int fan_set_speed(int speed)
7621 {
7622         int rc;
7623
7624         if (!fan_control_allowed)
7625                 return -EPERM;
7626
7627         if (mutex_lock_killable(&fan_mutex))
7628                 return -ERESTARTSYS;
7629
7630         rc = 0;
7631         switch (fan_control_access_mode) {
7632         case TPACPI_FAN_WR_ACPI_FANS:
7633                 if (speed >= 0 && speed <= 65535) {
7634                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7635                                         speed, speed, speed))
7636                                 rc = -EIO;
7637                 } else
7638                         rc = -EINVAL;
7639                 break;
7640
7641         default:
7642                 rc = -ENXIO;
7643         }
7644
7645         mutex_unlock(&fan_mutex);
7646         return rc;
7647 }
7648
7649 static void fan_watchdog_reset(void)
7650 {
7651         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7652                 return;
7653
7654         if (fan_watchdog_maxinterval > 0 &&
7655             tpacpi_lifecycle != TPACPI_LIFE_EXITING)
7656                 mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
7657                         msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
7658         else
7659                 cancel_delayed_work(&fan_watchdog_task);
7660 }
7661
7662 static void fan_watchdog_fire(struct work_struct *ignored)
7663 {
7664         int rc;
7665
7666         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7667                 return;
7668
7669         pr_notice("fan watchdog: enabling fan\n");
7670         rc = fan_set_enable();
7671         if (rc < 0) {
7672                 pr_err("fan watchdog: error %d while enabling fan, "
7673                        "will try again later...\n", -rc);
7674                 /* reschedule for later */
7675                 fan_watchdog_reset();
7676         }
7677 }
7678
7679 /*
7680  * SYSFS fan layout: hwmon compatible (device)
7681  *
7682  * pwm*_enable:
7683  *      0: "disengaged" mode
7684  *      1: manual mode
7685  *      2: native EC "auto" mode (recommended, hardware default)
7686  *
7687  * pwm*: set speed in manual mode, ignored otherwise.
7688  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7689  *      interpolation.
7690  *
7691  * fan*_input: tachometer reading, RPM
7692  *
7693  *
7694  * SYSFS fan layout: extensions
7695  *
7696  * fan_watchdog (driver):
7697  *      fan watchdog interval in seconds, 0 disables (default), max 120
7698  */
7699
7700 /* sysfs fan pwm1_enable ----------------------------------------------- */
7701 static ssize_t fan_pwm1_enable_show(struct device *dev,
7702                                     struct device_attribute *attr,
7703                                     char *buf)
7704 {
7705         int res, mode;
7706         u8 status;
7707
7708         res = fan_get_status_safe(&status);
7709         if (res)
7710                 return res;
7711
7712         if (status & TP_EC_FAN_FULLSPEED) {
7713                 mode = 0;
7714         } else if (status & TP_EC_FAN_AUTO) {
7715                 mode = 2;
7716         } else
7717                 mode = 1;
7718
7719         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7720 }
7721
7722 static ssize_t fan_pwm1_enable_store(struct device *dev,
7723                                      struct device_attribute *attr,
7724                                      const char *buf, size_t count)
7725 {
7726         unsigned long t;
7727         int res, level;
7728
7729         if (parse_strtoul(buf, 2, &t))
7730                 return -EINVAL;
7731
7732         tpacpi_disclose_usertask("hwmon pwm1_enable",
7733                         "set fan mode to %lu\n", t);
7734
7735         switch (t) {
7736         case 0:
7737                 level = TP_EC_FAN_FULLSPEED;
7738                 break;
7739         case 1:
7740                 level = TPACPI_FAN_LAST_LEVEL;
7741                 break;
7742         case 2:
7743                 level = TP_EC_FAN_AUTO;
7744                 break;
7745         case 3:
7746                 /* reserved for software-controlled auto mode */
7747                 return -ENOSYS;
7748         default:
7749                 return -EINVAL;
7750         }
7751
7752         res = fan_set_level_safe(level);
7753         if (res == -ENXIO)
7754                 return -EINVAL;
7755         else if (res < 0)
7756                 return res;
7757
7758         fan_watchdog_reset();
7759
7760         return count;
7761 }
7762
7763 static struct device_attribute dev_attr_fan_pwm1_enable =
7764         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7765                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7766
7767 /* sysfs fan pwm1 ------------------------------------------------------ */
7768 static ssize_t fan_pwm1_show(struct device *dev,
7769                              struct device_attribute *attr,
7770                              char *buf)
7771 {
7772         int res;
7773         u8 status;
7774
7775         res = fan_get_status_safe(&status);
7776         if (res)
7777                 return res;
7778
7779         if ((status &
7780              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7781                 status = fan_control_desired_level;
7782
7783         if (status > 7)
7784                 status = 7;
7785
7786         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7787 }
7788
7789 static ssize_t fan_pwm1_store(struct device *dev,
7790                               struct device_attribute *attr,
7791                               const char *buf, size_t count)
7792 {
7793         unsigned long s;
7794         int rc;
7795         u8 status, newlevel;
7796
7797         if (parse_strtoul(buf, 255, &s))
7798                 return -EINVAL;
7799
7800         tpacpi_disclose_usertask("hwmon pwm1",
7801                         "set fan speed to %lu\n", s);
7802
7803         /* scale down from 0-255 to 0-7 */
7804         newlevel = (s >> 5) & 0x07;
7805
7806         if (mutex_lock_killable(&fan_mutex))
7807                 return -ERESTARTSYS;
7808
7809         rc = fan_get_status(&status);
7810         if (!rc && (status &
7811                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7812                 rc = fan_set_level(newlevel);
7813                 if (rc == -ENXIO)
7814                         rc = -EINVAL;
7815                 else if (!rc) {
7816                         fan_update_desired_level(newlevel);
7817                         fan_watchdog_reset();
7818                 }
7819         }
7820
7821         mutex_unlock(&fan_mutex);
7822         return (rc)? rc : count;
7823 }
7824
7825 static struct device_attribute dev_attr_fan_pwm1 =
7826         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7827                 fan_pwm1_show, fan_pwm1_store);
7828
7829 /* sysfs fan fan1_input ------------------------------------------------ */
7830 static ssize_t fan_fan1_input_show(struct device *dev,
7831                            struct device_attribute *attr,
7832                            char *buf)
7833 {
7834         int res;
7835         unsigned int speed;
7836
7837         res = fan_get_speed(&speed);
7838         if (res < 0)
7839                 return res;
7840
7841         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7842 }
7843
7844 static struct device_attribute dev_attr_fan_fan1_input =
7845         __ATTR(fan1_input, S_IRUGO,
7846                 fan_fan1_input_show, NULL);
7847
7848 /* sysfs fan fan2_input ------------------------------------------------ */
7849 static ssize_t fan_fan2_input_show(struct device *dev,
7850                            struct device_attribute *attr,
7851                            char *buf)
7852 {
7853         int res;
7854         unsigned int speed;
7855
7856         res = fan2_get_speed(&speed);
7857         if (res < 0)
7858                 return res;
7859
7860         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7861 }
7862
7863 static struct device_attribute dev_attr_fan_fan2_input =
7864         __ATTR(fan2_input, S_IRUGO,
7865                 fan_fan2_input_show, NULL);
7866
7867 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7868 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7869                                      char *buf)
7870 {
7871         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7872 }
7873
7874 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7875                                       const char *buf, size_t count)
7876 {
7877         unsigned long t;
7878
7879         if (parse_strtoul(buf, 120, &t))
7880                 return -EINVAL;
7881
7882         if (!fan_control_allowed)
7883                 return -EPERM;
7884
7885         fan_watchdog_maxinterval = t;
7886         fan_watchdog_reset();
7887
7888         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7889
7890         return count;
7891 }
7892
7893 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7894                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7895
7896 /* --------------------------------------------------------------------- */
7897 static struct attribute *fan_attributes[] = {
7898         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7899         &dev_attr_fan_fan1_input.attr,
7900         NULL, /* for fan2_input */
7901         NULL
7902 };
7903
7904 static const struct attribute_group fan_attr_group = {
7905         .attrs = fan_attributes,
7906 };
7907
7908 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7909 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7910
7911 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7912         { .vendor = PCI_VENDOR_ID_IBM,          \
7913           .bios = TPACPI_MATCH_ANY,             \
7914           .ec = TPID(__id1, __id2),             \
7915           .quirks = __quirks }
7916
7917 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7918         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7919           .bios = TPACPI_MATCH_ANY,             \
7920           .ec = TPID(__id1, __id2),             \
7921           .quirks = __quirks }
7922
7923 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7924         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7925         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7926         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7927         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7928         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7929 };
7930
7931 #undef TPACPI_FAN_QL
7932 #undef TPACPI_FAN_QI
7933
7934 static int __init fan_init(struct ibm_init_struct *iibm)
7935 {
7936         int rc;
7937         unsigned long quirks;
7938
7939         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7940                         "initializing fan subdriver\n");
7941
7942         mutex_init(&fan_mutex);
7943         fan_status_access_mode = TPACPI_FAN_NONE;
7944         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7945         fan_control_commands = 0;
7946         fan_watchdog_maxinterval = 0;
7947         tp_features.fan_ctrl_status_undef = 0;
7948         tp_features.second_fan = 0;
7949         fan_control_desired_level = 7;
7950
7951         if (tpacpi_is_ibm()) {
7952                 TPACPI_ACPIHANDLE_INIT(fans);
7953                 TPACPI_ACPIHANDLE_INIT(gfan);
7954                 TPACPI_ACPIHANDLE_INIT(sfan);
7955         }
7956
7957         quirks = tpacpi_check_quirks(fan_quirk_table,
7958                                      ARRAY_SIZE(fan_quirk_table));
7959
7960         if (gfan_handle) {
7961                 /* 570, 600e/x, 770e, 770x */
7962                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7963         } else {
7964                 /* all other ThinkPads: note that even old-style
7965                  * ThinkPad ECs supports the fan control register */
7966                 if (likely(acpi_ec_read(fan_status_offset,
7967                                         &fan_control_initial_status))) {
7968                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7969                         if (quirks & TPACPI_FAN_Q1)
7970                                 fan_quirk1_setup();
7971                         if (quirks & TPACPI_FAN_2FAN) {
7972                                 tp_features.second_fan = 1;
7973                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7974                                         "secondary fan support enabled\n");
7975                         }
7976                 } else {
7977                         pr_err("ThinkPad ACPI EC access misbehaving, "
7978                                "fan status and control unavailable\n");
7979                         return 1;
7980                 }
7981         }
7982
7983         if (sfan_handle) {
7984                 /* 570, 770x-JL */
7985                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7986                 fan_control_commands |=
7987                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7988         } else {
7989                 if (!gfan_handle) {
7990                         /* gfan without sfan means no fan control */
7991                         /* all other models implement TP EC 0x2f control */
7992
7993                         if (fans_handle) {
7994                                 /* X31, X40, X41 */
7995                                 fan_control_access_mode =
7996                                     TPACPI_FAN_WR_ACPI_FANS;
7997                                 fan_control_commands |=
7998                                     TPACPI_FAN_CMD_SPEED |
7999                                     TPACPI_FAN_CMD_LEVEL |
8000                                     TPACPI_FAN_CMD_ENABLE;
8001                         } else {
8002                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8003                                 fan_control_commands |=
8004                                     TPACPI_FAN_CMD_LEVEL |
8005                                     TPACPI_FAN_CMD_ENABLE;
8006                         }
8007                 }
8008         }
8009
8010         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8011                 "fan is %s, modes %d, %d\n",
8012                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8013                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
8014                 fan_status_access_mode, fan_control_access_mode);
8015
8016         /* fan control master switch */
8017         if (!fan_control_allowed) {
8018                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
8019                 fan_control_commands = 0;
8020                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8021                            "fan control features disabled by parameter\n");
8022         }
8023
8024         /* update fan_control_desired_level */
8025         if (fan_status_access_mode != TPACPI_FAN_NONE)
8026                 fan_get_status_safe(NULL);
8027
8028         if (fan_status_access_mode != TPACPI_FAN_NONE ||
8029             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
8030                 if (tp_features.second_fan) {
8031                         /* attach second fan tachometer */
8032                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
8033                                         &dev_attr_fan_fan2_input.attr;
8034                 }
8035                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
8036                                          &fan_attr_group);
8037                 if (rc < 0)
8038                         return rc;
8039
8040                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
8041                                         &driver_attr_fan_watchdog);
8042                 if (rc < 0) {
8043                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
8044                                         &fan_attr_group);
8045                         return rc;
8046                 }
8047                 return 0;
8048         } else
8049                 return 1;
8050 }
8051
8052 static void fan_exit(void)
8053 {
8054         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8055                     "cancelling any pending fan watchdog tasks\n");
8056
8057         /* FIXME: can we really do this unconditionally? */
8058         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8059         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8060                            &driver_attr_fan_watchdog);
8061
8062         cancel_delayed_work(&fan_watchdog_task);
8063         flush_workqueue(tpacpi_wq);
8064 }
8065
8066 static void fan_suspend(void)
8067 {
8068         int rc;
8069
8070         if (!fan_control_allowed)
8071                 return;
8072
8073         /* Store fan status in cache */
8074         fan_control_resume_level = 0;
8075         rc = fan_get_status_safe(&fan_control_resume_level);
8076         if (rc < 0)
8077                 pr_notice("failed to read fan level for later "
8078                           "restore during resume: %d\n", rc);
8079
8080         /* if it is undefined, don't attempt to restore it.
8081          * KEEP THIS LAST */
8082         if (tp_features.fan_ctrl_status_undef)
8083                 fan_control_resume_level = 0;
8084 }
8085
8086 static void fan_resume(void)
8087 {
8088         u8 current_level = 7;
8089         bool do_set = false;
8090         int rc;
8091
8092         /* DSDT *always* updates status on resume */
8093         tp_features.fan_ctrl_status_undef = 0;
8094
8095         if (!fan_control_allowed ||
8096             !fan_control_resume_level ||
8097             (fan_get_status_safe(&current_level) < 0))
8098                 return;
8099
8100         switch (fan_control_access_mode) {
8101         case TPACPI_FAN_WR_ACPI_SFAN:
8102                 /* never decrease fan level */
8103                 do_set = (fan_control_resume_level > current_level);
8104                 break;
8105         case TPACPI_FAN_WR_ACPI_FANS:
8106         case TPACPI_FAN_WR_TPEC:
8107                 /* never decrease fan level, scale is:
8108                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8109                  *
8110                  * We expect the firmware to set either 7 or AUTO, but we
8111                  * handle FULLSPEED out of paranoia.
8112                  *
8113                  * So, we can safely only restore FULLSPEED or 7, anything
8114                  * else could slow the fan.  Restoring AUTO is useless, at
8115                  * best that's exactly what the DSDT already set (it is the
8116                  * slower it uses).
8117                  *
8118                  * Always keep in mind that the DSDT *will* have set the
8119                  * fans to what the vendor supposes is the best level.  We
8120                  * muck with it only to speed the fan up.
8121                  */
8122                 if (fan_control_resume_level != 7 &&
8123                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8124                         return;
8125                 else
8126                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8127                                  (current_level != fan_control_resume_level);
8128                 break;
8129         default:
8130                 return;
8131         }
8132         if (do_set) {
8133                 pr_notice("restoring fan level to 0x%02x\n",
8134                           fan_control_resume_level);
8135                 rc = fan_set_level_safe(fan_control_resume_level);
8136                 if (rc < 0)
8137                         pr_notice("failed to restore fan level: %d\n", rc);
8138         }
8139 }
8140
8141 static int fan_read(struct seq_file *m)
8142 {
8143         int rc;
8144         u8 status;
8145         unsigned int speed = 0;
8146
8147         switch (fan_status_access_mode) {
8148         case TPACPI_FAN_RD_ACPI_GFAN:
8149                 /* 570, 600e/x, 770e, 770x */
8150                 rc = fan_get_status_safe(&status);
8151                 if (rc < 0)
8152                         return rc;
8153
8154                 seq_printf(m, "status:\t\t%s\n"
8155                                "level:\t\t%d\n",
8156                                (status != 0) ? "enabled" : "disabled", status);
8157                 break;
8158
8159         case TPACPI_FAN_RD_TPEC:
8160                 /* all except 570, 600e/x, 770e, 770x */
8161                 rc = fan_get_status_safe(&status);
8162                 if (rc < 0)
8163                         return rc;
8164
8165                 seq_printf(m, "status:\t\t%s\n",
8166                                (status != 0) ? "enabled" : "disabled");
8167
8168                 rc = fan_get_speed(&speed);
8169                 if (rc < 0)
8170                         return rc;
8171
8172                 seq_printf(m, "speed:\t\t%d\n", speed);
8173
8174                 if (status & TP_EC_FAN_FULLSPEED)
8175                         /* Disengaged mode takes precedence */
8176                         seq_printf(m, "level:\t\tdisengaged\n");
8177                 else if (status & TP_EC_FAN_AUTO)
8178                         seq_printf(m, "level:\t\tauto\n");
8179                 else
8180                         seq_printf(m, "level:\t\t%d\n", status);
8181                 break;
8182
8183         case TPACPI_FAN_NONE:
8184         default:
8185                 seq_printf(m, "status:\t\tnot supported\n");
8186         }
8187
8188         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8189                 seq_printf(m, "commands:\tlevel <level>");
8190
8191                 switch (fan_control_access_mode) {
8192                 case TPACPI_FAN_WR_ACPI_SFAN:
8193                         seq_printf(m, " (<level> is 0-7)\n");
8194                         break;
8195
8196                 default:
8197                         seq_printf(m, " (<level> is 0-7, "
8198                                        "auto, disengaged, full-speed)\n");
8199                         break;
8200                 }
8201         }
8202
8203         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8204                 seq_printf(m, "commands:\tenable, disable\n"
8205                                "commands:\twatchdog <timeout> (<timeout> "
8206                                "is 0 (off), 1-120 (seconds))\n");
8207
8208         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8209                 seq_printf(m, "commands:\tspeed <speed>"
8210                                " (<speed> is 0-65535)\n");
8211
8212         return 0;
8213 }
8214
8215 static int fan_write_cmd_level(const char *cmd, int *rc)
8216 {
8217         int level;
8218
8219         if (strlencmp(cmd, "level auto") == 0)
8220                 level = TP_EC_FAN_AUTO;
8221         else if ((strlencmp(cmd, "level disengaged") == 0) |
8222                         (strlencmp(cmd, "level full-speed") == 0))
8223                 level = TP_EC_FAN_FULLSPEED;
8224         else if (sscanf(cmd, "level %d", &level) != 1)
8225                 return 0;
8226
8227         *rc = fan_set_level_safe(level);
8228         if (*rc == -ENXIO)
8229                 pr_err("level command accepted for unsupported access mode %d\n",
8230                        fan_control_access_mode);
8231         else if (!*rc)
8232                 tpacpi_disclose_usertask("procfs fan",
8233                         "set level to %d\n", level);
8234
8235         return 1;
8236 }
8237
8238 static int fan_write_cmd_enable(const char *cmd, int *rc)
8239 {
8240         if (strlencmp(cmd, "enable") != 0)
8241                 return 0;
8242
8243         *rc = fan_set_enable();
8244         if (*rc == -ENXIO)
8245                 pr_err("enable command accepted for unsupported access mode %d\n",
8246                        fan_control_access_mode);
8247         else if (!*rc)
8248                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8249
8250         return 1;
8251 }
8252
8253 static int fan_write_cmd_disable(const char *cmd, int *rc)
8254 {
8255         if (strlencmp(cmd, "disable") != 0)
8256                 return 0;
8257
8258         *rc = fan_set_disable();
8259         if (*rc == -ENXIO)
8260                 pr_err("disable command accepted for unsupported access mode %d\n",
8261                        fan_control_access_mode);
8262         else if (!*rc)
8263                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8264
8265         return 1;
8266 }
8267
8268 static int fan_write_cmd_speed(const char *cmd, int *rc)
8269 {
8270         int speed;
8271
8272         /* TODO:
8273          * Support speed <low> <medium> <high> ? */
8274
8275         if (sscanf(cmd, "speed %d", &speed) != 1)
8276                 return 0;
8277
8278         *rc = fan_set_speed(speed);
8279         if (*rc == -ENXIO)
8280                 pr_err("speed command accepted for unsupported access mode %d\n",
8281                        fan_control_access_mode);
8282         else if (!*rc)
8283                 tpacpi_disclose_usertask("procfs fan",
8284                         "set speed to %d\n", speed);
8285
8286         return 1;
8287 }
8288
8289 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8290 {
8291         int interval;
8292
8293         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8294                 return 0;
8295
8296         if (interval < 0 || interval > 120)
8297                 *rc = -EINVAL;
8298         else {
8299                 fan_watchdog_maxinterval = interval;
8300                 tpacpi_disclose_usertask("procfs fan",
8301                         "set watchdog timer to %d\n",
8302                         interval);
8303         }
8304
8305         return 1;
8306 }
8307
8308 static int fan_write(char *buf)
8309 {
8310         char *cmd;
8311         int rc = 0;
8312
8313         while (!rc && (cmd = next_cmd(&buf))) {
8314                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8315                       fan_write_cmd_level(cmd, &rc)) &&
8316                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8317                       (fan_write_cmd_enable(cmd, &rc) ||
8318                        fan_write_cmd_disable(cmd, &rc) ||
8319                        fan_write_cmd_watchdog(cmd, &rc))) &&
8320                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8321                       fan_write_cmd_speed(cmd, &rc))
8322                     )
8323                         rc = -EINVAL;
8324                 else if (!rc)
8325                         fan_watchdog_reset();
8326         }
8327
8328         return rc;
8329 }
8330
8331 static struct ibm_struct fan_driver_data = {
8332         .name = "fan",
8333         .read = fan_read,
8334         .write = fan_write,
8335         .exit = fan_exit,
8336         .suspend = fan_suspend,
8337         .resume = fan_resume,
8338 };
8339
8340 /****************************************************************************
8341  ****************************************************************************
8342  *
8343  * Infrastructure
8344  *
8345  ****************************************************************************
8346  ****************************************************************************/
8347
8348 /*
8349  * HKEY event callout for other subdrivers go here
8350  * (yes, it is ugly, but it is quick, safe, and gets the job done
8351  */
8352 static void tpacpi_driver_event(const unsigned int hkey_event)
8353 {
8354         if (ibm_backlight_device) {
8355                 switch (hkey_event) {
8356                 case TP_HKEY_EV_BRGHT_UP:
8357                 case TP_HKEY_EV_BRGHT_DOWN:
8358                         tpacpi_brightness_notify_change();
8359                 }
8360         }
8361         if (alsa_card) {
8362                 switch (hkey_event) {
8363                 case TP_HKEY_EV_VOL_UP:
8364                 case TP_HKEY_EV_VOL_DOWN:
8365                 case TP_HKEY_EV_VOL_MUTE:
8366                         volume_alsa_notify_change();
8367                 }
8368         }
8369 }
8370
8371 static void hotkey_driver_event(const unsigned int scancode)
8372 {
8373         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8374 }
8375
8376 /* sysfs name ---------------------------------------------------------- */
8377 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8378                            struct device_attribute *attr,
8379                            char *buf)
8380 {
8381         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8382 }
8383
8384 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8385         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8386
8387 /* --------------------------------------------------------------------- */
8388
8389 /* /proc support */
8390 static struct proc_dir_entry *proc_dir;
8391
8392 /*
8393  * Module and infrastructure proble, init and exit handling
8394  */
8395
8396 static bool force_load;
8397
8398 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8399 static const char * __init str_supported(int is_supported)
8400 {
8401         static char text_unsupported[] __initdata = "not supported";
8402
8403         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8404 }
8405 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8406
8407 static void ibm_exit(struct ibm_struct *ibm)
8408 {
8409         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8410
8411         list_del_init(&ibm->all_drivers);
8412
8413         if (ibm->flags.acpi_notify_installed) {
8414                 dbg_printk(TPACPI_DBG_EXIT,
8415                         "%s: acpi_remove_notify_handler\n", ibm->name);
8416                 BUG_ON(!ibm->acpi);
8417                 acpi_remove_notify_handler(*ibm->acpi->handle,
8418                                            ibm->acpi->type,
8419                                            dispatch_acpi_notify);
8420                 ibm->flags.acpi_notify_installed = 0;
8421         }
8422
8423         if (ibm->flags.proc_created) {
8424                 dbg_printk(TPACPI_DBG_EXIT,
8425                         "%s: remove_proc_entry\n", ibm->name);
8426                 remove_proc_entry(ibm->name, proc_dir);
8427                 ibm->flags.proc_created = 0;
8428         }
8429
8430         if (ibm->flags.acpi_driver_registered) {
8431                 dbg_printk(TPACPI_DBG_EXIT,
8432                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8433                 BUG_ON(!ibm->acpi);
8434                 acpi_bus_unregister_driver(ibm->acpi->driver);
8435                 kfree(ibm->acpi->driver);
8436                 ibm->acpi->driver = NULL;
8437                 ibm->flags.acpi_driver_registered = 0;
8438         }
8439
8440         if (ibm->flags.init_called && ibm->exit) {
8441                 ibm->exit();
8442                 ibm->flags.init_called = 0;
8443         }
8444
8445         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8446 }
8447
8448 static int __init ibm_init(struct ibm_init_struct *iibm)
8449 {
8450         int ret;
8451         struct ibm_struct *ibm = iibm->data;
8452         struct proc_dir_entry *entry;
8453
8454         BUG_ON(ibm == NULL);
8455
8456         INIT_LIST_HEAD(&ibm->all_drivers);
8457
8458         if (ibm->flags.experimental && !experimental)
8459                 return 0;
8460
8461         dbg_printk(TPACPI_DBG_INIT,
8462                 "probing for %s\n", ibm->name);
8463
8464         if (iibm->init) {
8465                 ret = iibm->init(iibm);
8466                 if (ret > 0)
8467                         return 0;       /* probe failed */
8468                 if (ret)
8469                         return ret;
8470
8471                 ibm->flags.init_called = 1;
8472         }
8473
8474         if (ibm->acpi) {
8475                 if (ibm->acpi->hid) {
8476                         ret = register_tpacpi_subdriver(ibm);
8477                         if (ret)
8478                                 goto err_out;
8479                 }
8480
8481                 if (ibm->acpi->notify) {
8482                         ret = setup_acpi_notify(ibm);
8483                         if (ret == -ENODEV) {
8484                                 pr_notice("disabling subdriver %s\n",
8485                                           ibm->name);
8486                                 ret = 0;
8487                                 goto err_out;
8488                         }
8489                         if (ret < 0)
8490                                 goto err_out;
8491                 }
8492         }
8493
8494         dbg_printk(TPACPI_DBG_INIT,
8495                 "%s installed\n", ibm->name);
8496
8497         if (ibm->read) {
8498                 umode_t mode = iibm->base_procfs_mode;
8499
8500                 if (!mode)
8501                         mode = S_IRUGO;
8502                 if (ibm->write)
8503                         mode |= S_IWUSR;
8504                 entry = proc_create_data(ibm->name, mode, proc_dir,
8505                                          &dispatch_proc_fops, ibm);
8506                 if (!entry) {
8507                         pr_err("unable to create proc entry %s\n", ibm->name);
8508                         ret = -ENODEV;
8509                         goto err_out;
8510                 }
8511                 ibm->flags.proc_created = 1;
8512         }
8513
8514         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8515
8516         return 0;
8517
8518 err_out:
8519         dbg_printk(TPACPI_DBG_INIT,
8520                 "%s: at error exit path with result %d\n",
8521                 ibm->name, ret);
8522
8523         ibm_exit(ibm);
8524         return (ret < 0)? ret : 0;
8525 }
8526
8527 /* Probing */
8528
8529 static bool __pure __init tpacpi_is_fw_digit(const char c)
8530 {
8531         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8532 }
8533
8534 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8535 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8536                                                 const char t)
8537 {
8538         return s && strlen(s) >= 8 &&
8539                 tpacpi_is_fw_digit(s[0]) &&
8540                 tpacpi_is_fw_digit(s[1]) &&
8541                 s[2] == t &&
8542                 (s[3] == 'T' || s[3] == 'N') &&
8543                 tpacpi_is_fw_digit(s[4]) &&
8544                 tpacpi_is_fw_digit(s[5]);
8545 }
8546
8547 /* returns 0 - probe ok, or < 0 - probe error.
8548  * Probe ok doesn't mean thinkpad found.
8549  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8550 static int __must_check __init get_thinkpad_model_data(
8551                                                 struct thinkpad_id_data *tp)
8552 {
8553         const struct dmi_device *dev = NULL;
8554         char ec_fw_string[18];
8555         char const *s;
8556
8557         if (!tp)
8558                 return -EINVAL;
8559
8560         memset(tp, 0, sizeof(*tp));
8561
8562         if (dmi_name_in_vendors("IBM"))
8563                 tp->vendor = PCI_VENDOR_ID_IBM;
8564         else if (dmi_name_in_vendors("LENOVO"))
8565                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8566         else
8567                 return 0;
8568
8569         s = dmi_get_system_info(DMI_BIOS_VERSION);
8570         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8571         if (s && !tp->bios_version_str)
8572                 return -ENOMEM;
8573
8574         /* Really ancient ThinkPad 240X will fail this, which is fine */
8575         if (!(tpacpi_is_valid_fw_id(tp->bios_version_str, 'E') ||
8576               tpacpi_is_valid_fw_id(tp->bios_version_str, 'C')))
8577                 return 0;
8578
8579         tp->bios_model = tp->bios_version_str[0]
8580                          | (tp->bios_version_str[1] << 8);
8581         tp->bios_release = (tp->bios_version_str[4] << 8)
8582                          | tp->bios_version_str[5];
8583
8584         /*
8585          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8586          * X32 or newer, all Z series;  Some models must have an
8587          * up-to-date BIOS or they will not be detected.
8588          *
8589          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8590          */
8591         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8592                 if (sscanf(dev->name,
8593                            "IBM ThinkPad Embedded Controller -[%17c",
8594                            ec_fw_string) == 1) {
8595                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8596                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8597
8598                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8599                         if (!tp->ec_version_str)
8600                                 return -ENOMEM;
8601
8602                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8603                                 tp->ec_model = ec_fw_string[0]
8604                                                 | (ec_fw_string[1] << 8);
8605                                 tp->ec_release = (ec_fw_string[4] << 8)
8606                                                 | ec_fw_string[5];
8607                         } else {
8608                                 pr_notice("ThinkPad firmware release %s "
8609                                           "doesn't match the known patterns\n",
8610                                           ec_fw_string);
8611                                 pr_notice("please report this to %s\n",
8612                                           TPACPI_MAIL);
8613                         }
8614                         break;
8615                 }
8616         }
8617
8618         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8619         if (s && !(strnicmp(s, "ThinkPad", 8) && strnicmp(s, "Lenovo", 6))) {
8620                 tp->model_str = kstrdup(s, GFP_KERNEL);
8621                 if (!tp->model_str)
8622                         return -ENOMEM;
8623         } else {
8624                 s = dmi_get_system_info(DMI_BIOS_VENDOR);
8625                 if (s && !(strnicmp(s, "Lenovo", 6))) {
8626                         tp->model_str = kstrdup(s, GFP_KERNEL);
8627                         if (!tp->model_str)
8628                                 return -ENOMEM;
8629                 }
8630         }
8631
8632         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8633         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8634         if (s && !tp->nummodel_str)
8635                 return -ENOMEM;
8636
8637         return 0;
8638 }
8639
8640 static int __init probe_for_thinkpad(void)
8641 {
8642         int is_thinkpad;
8643
8644         if (acpi_disabled)
8645                 return -ENODEV;
8646
8647         /* It would be dangerous to run the driver in this case */
8648         if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
8649                 return -ENODEV;
8650
8651         /*
8652          * Non-ancient models have better DMI tagging, but very old models
8653          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8654          */
8655         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8656                       (thinkpad_id.ec_model != 0) ||
8657                       tpacpi_is_fw_known();
8658
8659         /* The EC handler is required */
8660         tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
8661         if (!ec_handle) {
8662                 if (is_thinkpad)
8663                         pr_err("Not yet supported ThinkPad detected!\n");
8664                 return -ENODEV;
8665         }
8666
8667         if (!is_thinkpad && !force_load)
8668                 return -ENODEV;
8669
8670         return 0;
8671 }
8672
8673 static void __init thinkpad_acpi_init_banner(void)
8674 {
8675         pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
8676         pr_info("%s\n", TPACPI_URL);
8677
8678         pr_info("ThinkPad BIOS %s, EC %s\n",
8679                 (thinkpad_id.bios_version_str) ?
8680                         thinkpad_id.bios_version_str : "unknown",
8681                 (thinkpad_id.ec_version_str) ?
8682                         thinkpad_id.ec_version_str : "unknown");
8683
8684         BUG_ON(!thinkpad_id.vendor);
8685
8686         if (thinkpad_id.model_str)
8687                 pr_info("%s %s, model %s\n",
8688                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
8689                                 "IBM" : ((thinkpad_id.vendor ==
8690                                                 PCI_VENDOR_ID_LENOVO) ?
8691                                         "Lenovo" : "Unknown vendor"),
8692                         thinkpad_id.model_str,
8693                         (thinkpad_id.nummodel_str) ?
8694                                 thinkpad_id.nummodel_str : "unknown");
8695 }
8696
8697 /* Module init, exit, parameters */
8698
8699 static struct ibm_init_struct ibms_init[] __initdata = {
8700         {
8701                 .data = &thinkpad_acpi_driver_data,
8702         },
8703         {
8704                 .init = hotkey_init,
8705                 .data = &hotkey_driver_data,
8706         },
8707         {
8708                 .init = bluetooth_init,
8709                 .data = &bluetooth_driver_data,
8710         },
8711         {
8712                 .init = wan_init,
8713                 .data = &wan_driver_data,
8714         },
8715         {
8716                 .init = uwb_init,
8717                 .data = &uwb_driver_data,
8718         },
8719 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8720         {
8721                 .init = video_init,
8722                 .base_procfs_mode = S_IRUSR,
8723                 .data = &video_driver_data,
8724         },
8725 #endif
8726         {
8727                 .init = light_init,
8728                 .data = &light_driver_data,
8729         },
8730         {
8731                 .init = cmos_init,
8732                 .data = &cmos_driver_data,
8733         },
8734         {
8735                 .init = led_init,
8736                 .data = &led_driver_data,
8737         },
8738         {
8739                 .init = beep_init,
8740                 .data = &beep_driver_data,
8741         },
8742         {
8743                 .init = thermal_init,
8744                 .data = &thermal_driver_data,
8745         },
8746         {
8747                 .init = brightness_init,
8748                 .data = &brightness_driver_data,
8749         },
8750         {
8751                 .init = volume_init,
8752                 .data = &volume_driver_data,
8753         },
8754         {
8755                 .init = fan_init,
8756                 .data = &fan_driver_data,
8757         },
8758 };
8759
8760 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8761 {
8762         unsigned int i;
8763         struct ibm_struct *ibm;
8764
8765         if (!kp || !kp->name || !val)
8766                 return -EINVAL;
8767
8768         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8769                 ibm = ibms_init[i].data;
8770                 WARN_ON(ibm == NULL);
8771
8772                 if (!ibm || !ibm->name)
8773                         continue;
8774
8775                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8776                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8777                                 return -ENOSPC;
8778                         strcpy(ibms_init[i].param, val);
8779                         strcat(ibms_init[i].param, ",");
8780                         return 0;
8781                 }
8782         }
8783
8784         return -EINVAL;
8785 }
8786
8787 module_param(experimental, int, 0444);
8788 MODULE_PARM_DESC(experimental,
8789                  "Enables experimental features when non-zero");
8790
8791 module_param_named(debug, dbg_level, uint, 0);
8792 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8793
8794 module_param(force_load, bool, 0444);
8795 MODULE_PARM_DESC(force_load,
8796                  "Attempts to load the driver even on a "
8797                  "mis-identified ThinkPad when true");
8798
8799 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8800 MODULE_PARM_DESC(fan_control,
8801                  "Enables setting fan parameters features when true");
8802
8803 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8804 MODULE_PARM_DESC(brightness_mode,
8805                  "Selects brightness control strategy: "
8806                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8807
8808 module_param(brightness_enable, uint, 0444);
8809 MODULE_PARM_DESC(brightness_enable,
8810                  "Enables backlight control when 1, disables when 0");
8811
8812 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
8813 module_param_named(volume_mode, volume_mode, uint, 0444);
8814 MODULE_PARM_DESC(volume_mode,
8815                  "Selects volume control strategy: "
8816                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8817
8818 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8819 MODULE_PARM_DESC(volume_capabilities,
8820                  "Selects the mixer capabilites: "
8821                  "0=auto, 1=volume and mute, 2=mute only");
8822
8823 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8824 MODULE_PARM_DESC(volume_control,
8825                  "Enables software override for the console audio "
8826                  "control when true");
8827
8828 /* ALSA module API parameters */
8829 module_param_named(index, alsa_index, int, 0444);
8830 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8831 module_param_named(id, alsa_id, charp, 0444);
8832 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8833 module_param_named(enable, alsa_enable, bool, 0444);
8834 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8835 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
8836
8837 #define TPACPI_PARAM(feature) \
8838         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8839         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8840                          "at module load, see documentation")
8841
8842 TPACPI_PARAM(hotkey);
8843 TPACPI_PARAM(bluetooth);
8844 TPACPI_PARAM(video);
8845 TPACPI_PARAM(light);
8846 TPACPI_PARAM(cmos);
8847 TPACPI_PARAM(led);
8848 TPACPI_PARAM(beep);
8849 TPACPI_PARAM(brightness);
8850 TPACPI_PARAM(volume);
8851 TPACPI_PARAM(fan);
8852
8853 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8854 module_param(dbg_wlswemul, uint, 0444);
8855 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8856 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8857 MODULE_PARM_DESC(wlsw_state,
8858                  "Initial state of the emulated WLSW switch");
8859
8860 module_param(dbg_bluetoothemul, uint, 0444);
8861 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8862 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8863 MODULE_PARM_DESC(bluetooth_state,
8864                  "Initial state of the emulated bluetooth switch");
8865
8866 module_param(dbg_wwanemul, uint, 0444);
8867 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8868 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8869 MODULE_PARM_DESC(wwan_state,
8870                  "Initial state of the emulated WWAN switch");
8871
8872 module_param(dbg_uwbemul, uint, 0444);
8873 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8874 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8875 MODULE_PARM_DESC(uwb_state,
8876                  "Initial state of the emulated UWB switch");
8877 #endif
8878
8879 static void thinkpad_acpi_module_exit(void)
8880 {
8881         struct ibm_struct *ibm, *itmp;
8882
8883         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8884
8885         list_for_each_entry_safe_reverse(ibm, itmp,
8886                                          &tpacpi_all_drivers,
8887                                          all_drivers) {
8888                 ibm_exit(ibm);
8889         }
8890
8891         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8892
8893         if (tpacpi_inputdev) {
8894                 if (tp_features.input_device_registered)
8895                         input_unregister_device(tpacpi_inputdev);
8896                 else
8897                         input_free_device(tpacpi_inputdev);
8898                 kfree(hotkey_keycode_map);
8899         }
8900
8901         if (tpacpi_hwmon)
8902                 hwmon_device_unregister(tpacpi_hwmon);
8903
8904         if (tp_features.sensors_pdev_attrs_registered)
8905                 device_remove_file(&tpacpi_sensors_pdev->dev,
8906                                    &dev_attr_thinkpad_acpi_pdev_name);
8907         if (tpacpi_sensors_pdev)
8908                 platform_device_unregister(tpacpi_sensors_pdev);
8909         if (tpacpi_pdev)
8910                 platform_device_unregister(tpacpi_pdev);
8911
8912         if (tp_features.sensors_pdrv_attrs_registered)
8913                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8914         if (tp_features.platform_drv_attrs_registered)
8915                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8916
8917         if (tp_features.sensors_pdrv_registered)
8918                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8919
8920         if (tp_features.platform_drv_registered)
8921                 platform_driver_unregister(&tpacpi_pdriver);
8922
8923         if (proc_dir)
8924                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8925
8926         if (tpacpi_wq)
8927                 destroy_workqueue(tpacpi_wq);
8928
8929         kfree(thinkpad_id.bios_version_str);
8930         kfree(thinkpad_id.ec_version_str);
8931         kfree(thinkpad_id.model_str);
8932         kfree(thinkpad_id.nummodel_str);
8933 }
8934
8935
8936 static int __init thinkpad_acpi_module_init(void)
8937 {
8938         int ret, i;
8939
8940         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8941
8942         /* Driver-level probe */
8943
8944         ret = get_thinkpad_model_data(&thinkpad_id);
8945         if (ret) {
8946                 pr_err("unable to get DMI data: %d\n", ret);
8947                 thinkpad_acpi_module_exit();
8948                 return ret;
8949         }
8950         ret = probe_for_thinkpad();
8951         if (ret) {
8952                 thinkpad_acpi_module_exit();
8953                 return ret;
8954         }
8955
8956         /* Driver initialization */
8957
8958         thinkpad_acpi_init_banner();
8959         tpacpi_check_outdated_fw();
8960
8961         TPACPI_ACPIHANDLE_INIT(ecrd);
8962         TPACPI_ACPIHANDLE_INIT(ecwr);
8963
8964         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8965         if (!tpacpi_wq) {
8966                 thinkpad_acpi_module_exit();
8967                 return -ENOMEM;
8968         }
8969
8970         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8971         if (!proc_dir) {
8972                 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
8973                 thinkpad_acpi_module_exit();
8974                 return -ENODEV;
8975         }
8976
8977         ret = platform_driver_register(&tpacpi_pdriver);
8978         if (ret) {
8979                 pr_err("unable to register main platform driver\n");
8980                 thinkpad_acpi_module_exit();
8981                 return ret;
8982         }
8983         tp_features.platform_drv_registered = 1;
8984
8985         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8986         if (ret) {
8987                 pr_err("unable to register hwmon platform driver\n");
8988                 thinkpad_acpi_module_exit();
8989                 return ret;
8990         }
8991         tp_features.sensors_pdrv_registered = 1;
8992
8993         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8994         if (!ret) {
8995                 tp_features.platform_drv_attrs_registered = 1;
8996                 ret = tpacpi_create_driver_attributes(
8997                                         &tpacpi_hwmon_pdriver.driver);
8998         }
8999         if (ret) {
9000                 pr_err("unable to create sysfs driver attributes\n");
9001                 thinkpad_acpi_module_exit();
9002                 return ret;
9003         }
9004         tp_features.sensors_pdrv_attrs_registered = 1;
9005
9006
9007         /* Device initialization */
9008         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
9009                                                         NULL, 0);
9010         if (IS_ERR(tpacpi_pdev)) {
9011                 ret = PTR_ERR(tpacpi_pdev);
9012                 tpacpi_pdev = NULL;
9013                 pr_err("unable to register platform device\n");
9014                 thinkpad_acpi_module_exit();
9015                 return ret;
9016         }
9017         tpacpi_sensors_pdev = platform_device_register_simple(
9018                                                 TPACPI_HWMON_DRVR_NAME,
9019                                                 -1, NULL, 0);
9020         if (IS_ERR(tpacpi_sensors_pdev)) {
9021                 ret = PTR_ERR(tpacpi_sensors_pdev);
9022                 tpacpi_sensors_pdev = NULL;
9023                 pr_err("unable to register hwmon platform device\n");
9024                 thinkpad_acpi_module_exit();
9025                 return ret;
9026         }
9027         ret = device_create_file(&tpacpi_sensors_pdev->dev,
9028                                  &dev_attr_thinkpad_acpi_pdev_name);
9029         if (ret) {
9030                 pr_err("unable to create sysfs hwmon device attributes\n");
9031                 thinkpad_acpi_module_exit();
9032                 return ret;
9033         }
9034         tp_features.sensors_pdev_attrs_registered = 1;
9035         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
9036         if (IS_ERR(tpacpi_hwmon)) {
9037                 ret = PTR_ERR(tpacpi_hwmon);
9038                 tpacpi_hwmon = NULL;
9039                 pr_err("unable to register hwmon device\n");
9040                 thinkpad_acpi_module_exit();
9041                 return ret;
9042         }
9043         mutex_init(&tpacpi_inputdev_send_mutex);
9044         tpacpi_inputdev = input_allocate_device();
9045         if (!tpacpi_inputdev) {
9046                 pr_err("unable to allocate input device\n");
9047                 thinkpad_acpi_module_exit();
9048                 return -ENOMEM;
9049         } else {
9050                 /* Prepare input device, but don't register */
9051                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
9052                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
9053                 tpacpi_inputdev->id.bustype = BUS_HOST;
9054                 tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
9055                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
9056                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
9057                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
9058         }
9059
9060         /* Init subdriver dependencies */
9061         tpacpi_detect_brightness_capabilities();
9062
9063         /* Init subdrivers */
9064         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
9065                 ret = ibm_init(&ibms_init[i]);
9066                 if (ret >= 0 && *ibms_init[i].param)
9067                         ret = ibms_init[i].data->write(ibms_init[i].param);
9068                 if (ret < 0) {
9069                         thinkpad_acpi_module_exit();
9070                         return ret;
9071                 }
9072         }
9073
9074         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9075
9076         ret = input_register_device(tpacpi_inputdev);
9077         if (ret < 0) {
9078                 pr_err("unable to register input device\n");
9079                 thinkpad_acpi_module_exit();
9080                 return ret;
9081         } else {
9082                 tp_features.input_device_registered = 1;
9083         }
9084
9085         return 0;
9086 }
9087
9088 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9089
9090 /*
9091  * This will autoload the driver in almost every ThinkPad
9092  * in widespread use.
9093  *
9094  * Only _VERY_ old models, like the 240, 240x and 570 lack
9095  * the HKEY event interface.
9096  */
9097 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9098
9099 /*
9100  * DMI matching for module autoloading
9101  *
9102  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9103  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9104  *
9105  * Only models listed in thinkwiki will be supported, so add yours
9106  * if it is not there yet.
9107  */
9108 #define IBM_BIOS_MODULE_ALIAS(__type) \
9109         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9110
9111 /* Ancient thinkpad BIOSes have to be identified by
9112  * BIOS type or model number, and there are far less
9113  * BIOS types than model numbers... */
9114 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
9115
9116 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9117 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9118 MODULE_DESCRIPTION(TPACPI_DESC);
9119 MODULE_VERSION(TPACPI_VERSION);
9120 MODULE_LICENSE("GPL");
9121
9122 module_init(thinkpad_acpi_module_init);
9123 module_exit(thinkpad_acpi_module_exit);