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   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.23"
  25 #define TPACPI_SYSFS_VERSION 0x020600
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /* HKEY events */
 149 enum tpacpi_hkey_event_t {
 150         /* Hotkey-related */
 151         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 152         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 153         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 154         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 155         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 156         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 157
 158         /* Reasons for waking up from S3/S4 */
 159         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 160         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 161         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 162         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 163         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 164         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 165
 166         /* Auto-sleep after eject request */
 167         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 168         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 169
 170         /* Misc bay events */
 171         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 172
 173         /* User-interface events */
 174         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 175         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 176         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 177         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 178         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 179         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 180         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 181
 182         /* Thermal events */
 183         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 184         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 185         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 186         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 187         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 188
 189         /* Misc */
 190         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 191 };
 192
 193 /****************************************************************************
 194  * Main driver
 195  */
 196
 197 #define TPACPI_NAME "thinkpad"
 198 #define TPACPI_DESC "ThinkPad ACPI Extras"
 199 #define TPACPI_FILE TPACPI_NAME "_acpi"
 200 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 201 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 202
 203 #define TPACPI_PROC_DIR "ibm"
 204 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 205 #define TPACPI_DRVR_NAME TPACPI_FILE
 206 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 207 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 208
 209 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 210 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 211
 212 #define TPACPI_MAX_ACPI_ARGS 3
 213
 214 /* printk headers */
 215 #define TPACPI_LOG TPACPI_FILE ": "
 216 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 217 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 218 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 219 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 220 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 221 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 222 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 223 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 224
 225 /* Debugging printk groups */
 226 #define TPACPI_DBG_ALL          0xffff
 227 #define TPACPI_DBG_DISCLOSETASK 0x8000
 228 #define TPACPI_DBG_INIT         0x0001
 229 #define TPACPI_DBG_EXIT         0x0002
 230 #define TPACPI_DBG_RFKILL       0x0004
 231 #define TPACPI_DBG_HKEY         0x0008
 232 #define TPACPI_DBG_FAN          0x0010
 233 #define TPACPI_DBG_BRGHT        0x0020
 234 #define TPACPI_DBG_MIXER        0x0040
 235
 236 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 237 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 238 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 239
 240
 241 /****************************************************************************
 242  * Driver-wide structs and misc. variables
 243  */
 244
 245 struct ibm_struct;
 246
 247 struct tp_acpi_drv_struct {
 248         const struct acpi_device_id *hid;
 249         struct acpi_driver *driver;
 250
 251         void (*notify) (struct ibm_struct *, u32);
 252         acpi_handle *handle;
 253         u32 type;
 254         struct acpi_device *device;
 255 };
 256
 257 struct ibm_struct {
 258         char *name;
 259
 260         int (*read) (char *);
 261         int (*write) (char *);
 262         void (*exit) (void);
 263         void (*resume) (void);
 264         void (*suspend) (pm_message_t state);
 265         void (*shutdown) (void);
 266
 267         struct list_head all_drivers;
 268
 269         struct tp_acpi_drv_struct *acpi;
 270
 271         struct {
 272                 u8 acpi_driver_registered:1;
 273                 u8 acpi_notify_installed:1;
 274                 u8 proc_created:1;
 275                 u8 init_called:1;
 276                 u8 experimental:1;
 277         } flags;
 278 };
 279
 280 struct ibm_init_struct {
 281         char param[32];
 282
 283         int (*init) (struct ibm_init_struct *);
 284         struct ibm_struct *data;
 285 };
 286
 287 static struct {
 288         u32 bluetooth:1;
 289         u32 hotkey:1;
 290         u32 hotkey_mask:1;
 291         u32 hotkey_wlsw:1;
 292         u32 hotkey_tablet:1;
 293         u32 light:1;
 294         u32 light_status:1;
 295         u32 bright_16levels:1;
 296         u32 bright_acpimode:1;
 297         u32 wan:1;
 298         u32 uwb:1;
 299         u32 fan_ctrl_status_undef:1;
 300         u32 second_fan:1;
 301         u32 beep_needs_two_args:1;
 302         u32 input_device_registered:1;
 303         u32 platform_drv_registered:1;
 304         u32 platform_drv_attrs_registered:1;
 305         u32 sensors_pdrv_registered:1;
 306         u32 sensors_pdrv_attrs_registered:1;
 307         u32 sensors_pdev_attrs_registered:1;
 308         u32 hotkey_poll_active:1;
 309 } tp_features;
 310
 311 static struct {
 312         u16 hotkey_mask_ff:1;
 313 } tp_warned;
 314
 315 struct thinkpad_id_data {
 316         unsigned int vendor;    /* ThinkPad vendor:
 317                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 318
 319         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 320         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 321
 322         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 323         u16 ec_model;
 324         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 325         u16 ec_release;
 326
 327         char *model_str;        /* ThinkPad T43 */
 328         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 329 };
 330 static struct thinkpad_id_data thinkpad_id;
 331
 332 static enum {
 333         TPACPI_LIFE_INIT = 0,
 334         TPACPI_LIFE_RUNNING,
 335         TPACPI_LIFE_EXITING,
 336 } tpacpi_lifecycle;
 337
 338 static int experimental;
 339 static u32 dbg_level;
 340
 341 static struct workqueue_struct *tpacpi_wq;
 342
 343 enum led_status_t {
 344         TPACPI_LED_OFF = 0,
 345         TPACPI_LED_ON,
 346         TPACPI_LED_BLINK,
 347 };
 348
 349 /* Special LED class that can defer work */
 350 struct tpacpi_led_classdev {
 351         struct led_classdev led_classdev;
 352         struct work_struct work;
 353         enum led_status_t new_state;
 354         unsigned int led;
 355 };
 356
 357 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 358 static int dbg_wlswemul;
 359 static int tpacpi_wlsw_emulstate;
 360 static int dbg_bluetoothemul;
 361 static int tpacpi_bluetooth_emulstate;
 362 static int dbg_wwanemul;
 363 static int tpacpi_wwan_emulstate;
 364 static int dbg_uwbemul;
 365 static int tpacpi_uwb_emulstate;
 366 #endif
 367
 368
 369 /*************************************************************************
 370  *  Debugging helpers
 371  */
 372
 373 #define dbg_printk(a_dbg_level, format, arg...) \
 374         do { if (dbg_level & (a_dbg_level)) \
 375                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 376         } while (0)
 377
 378 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 379 #define vdbg_printk dbg_printk
 380 static const char *str_supported(int is_supported);
 381 #else
 382 #define vdbg_printk(a_dbg_level, format, arg...) \
 383         do { } while (0)
 384 #endif
 385
 386 static void tpacpi_log_usertask(const char * const what)
 387 {
 388         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 389                 what, task_tgid_vnr(current));
 390 }
 391
 392 #define tpacpi_disclose_usertask(what, format, arg...) \
 393         do { \
 394                 if (unlikely( \
 395                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 396                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 397                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 398                                 what, task_tgid_vnr(current), ## arg); \
 399                 } \
 400         } while (0)
 401
 402 /*
 403  * Quirk handling helpers
 404  *
 405  * ThinkPad IDs and versions seen in the field so far
 406  * are two-characters from the set [0-9A-Z], i.e. base 36.
 407  *
 408  * We use values well outside that range as specials.
 409  */
 410
 411 #define TPACPI_MATCH_ANY                0xffffU
 412 #define TPACPI_MATCH_UNKNOWN            0U
 413
 414 /* TPID('1', 'Y') == 0x5931 */
 415 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 416
 417 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 418         { .vendor = PCI_VENDOR_ID_IBM,          \
 419           .bios = TPID(__id1, __id2),           \
 420           .ec = TPACPI_MATCH_ANY,               \
 421           .quirks = (__quirk) }
 422
 423 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 424         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 425           .bios = TPID(__id1, __id2),           \
 426           .ec = TPACPI_MATCH_ANY,               \
 427           .quirks = (__quirk) }
 428
 429 struct tpacpi_quirk {
 430         unsigned int vendor;
 431         u16 bios;
 432         u16 ec;
 433         unsigned long quirks;
 434 };
 435
 436 /**
 437  * tpacpi_check_quirks() - search BIOS/EC version on a list
 438  * @qlist:              array of &struct tpacpi_quirk
 439  * @qlist_size:         number of elements in @qlist
 440  *
 441  * Iterates over a quirks list until one is found that matches the
 442  * ThinkPad's vendor, BIOS and EC model.
 443  *
 444  * Returns 0 if nothing matches, otherwise returns the quirks field of
 445  * the matching &struct tpacpi_quirk entry.
 446  *
 447  * The match criteria is: vendor, ec and bios much match.
 448  */
 449 static unsigned long __init tpacpi_check_quirks(
 450                         const struct tpacpi_quirk *qlist,
 451                         unsigned int qlist_size)
 452 {
 453         while (qlist_size) {
 454                 if ((qlist->vendor == thinkpad_id.vendor ||
 455                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 456                     (qlist->bios == thinkpad_id.bios_model ||
 457                                 qlist->bios == TPACPI_MATCH_ANY) &&
 458                     (qlist->ec == thinkpad_id.ec_model ||
 459                                 qlist->ec == TPACPI_MATCH_ANY))
 460                         return qlist->quirks;
 461
 462                 qlist_size--;
 463                 qlist++;
 464         }
 465         return 0;
 466 }
 467
 468
 469 /****************************************************************************
 470  ****************************************************************************
 471  *
 472  * ACPI Helpers and device model
 473  *
 474  ****************************************************************************
 475  ****************************************************************************/
 476
 477 /*************************************************************************
 478  * ACPI basic handles
 479  */
 480
 481 static acpi_handle root_handle;
 482
 483 #define TPACPI_HANDLE(object, parent, paths...)                 \
 484         static acpi_handle  object##_handle;                    \
 485         static acpi_handle *object##_parent = &parent##_handle; \
 486         static char        *object##_path;                      \
 487         static char        *object##_paths[] = { paths }
 488
 489 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 490            "\\_SB.PCI.ISA.EC",  /* 570 */
 491            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 492            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 493            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 494            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 495            "\\_SB.PCI0.LPC.EC", /* all others */
 496            );
 497
 498 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 499 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 500
 501 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 502                                         /* T4x, X31, X40 */
 503            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 504            "\\CMS",             /* R40, R40e */
 505            );                   /* all others */
 506
 507 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 508            "^HKEY",             /* R30, R31 */
 509            "HKEY",              /* all others */
 510            );                   /* 570 */
 511
 512 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 513            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 514            "\\_SB.PCI0.VID0",   /* 770e */
 515            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 516            "\\_SB.PCI0.AGP.VID",        /* all others */
 517            );                           /* R30, R31 */
 518
 519
 520 /*************************************************************************
 521  * ACPI helpers
 522  */
 523
 524 static int acpi_evalf(acpi_handle handle,
 525                       void *res, char *method, char *fmt, ...)
 526 {
 527         char *fmt0 = fmt;
 528         struct acpi_object_list params;
 529         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 530         struct acpi_buffer result, *resultp;
 531         union acpi_object out_obj;
 532         acpi_status status;
 533         va_list ap;
 534         char res_type;
 535         int success;
 536         int quiet;
 537
 538         if (!*fmt) {
 539                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 540                 return 0;
 541         }
 542
 543         if (*fmt == 'q') {
 544                 quiet = 1;
 545                 fmt++;
 546         } else
 547                 quiet = 0;
 548
 549         res_type = *(fmt++);
 550
 551         params.count = 0;
 552         params.pointer = &in_objs[0];
 553
 554         va_start(ap, fmt);
 555         while (*fmt) {
 556                 char c = *(fmt++);
 557                 switch (c) {
 558                 case 'd':       /* int */
 559                         in_objs[params.count].integer.value = va_arg(ap, int);
 560                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 561                         break;
 562                         /* add more types as needed */
 563                 default:
 564                         printk(TPACPI_ERR "acpi_evalf() called "
 565                                "with invalid format character '%c'\n", c);
 566                         return 0;
 567                 }
 568         }
 569         va_end(ap);
 570
 571         if (res_type != 'v') {
 572                 result.length = sizeof(out_obj);
 573                 result.pointer = &out_obj;
 574                 resultp = &result;
 575         } else
 576                 resultp = NULL;
 577
 578         status = acpi_evaluate_object(handle, method, &params, resultp);
 579
 580         switch (res_type) {
 581         case 'd':               /* int */
 582                 if (res)
 583                         *(int *)res = out_obj.integer.value;
 584                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 585                 break;
 586         case 'v':               /* void */
 587                 success = status == AE_OK;
 588                 break;
 589                 /* add more types as needed */
 590         default:
 591                 printk(TPACPI_ERR "acpi_evalf() called "
 592                        "with invalid format character '%c'\n", res_type);
 593                 return 0;
 594         }
 595
 596         if (!success && !quiet)
 597                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 598                        method, fmt0, status);
 599
 600         return success;
 601 }
 602
 603 static int acpi_ec_read(int i, u8 *p)
 604 {
 605         int v;
 606
 607         if (ecrd_handle) {
 608                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 609                         return 0;
 610                 *p = v;
 611         } else {
 612                 if (ec_read(i, p) < 0)
 613                         return 0;
 614         }
 615
 616         return 1;
 617 }
 618
 619 static int acpi_ec_write(int i, u8 v)
 620 {
 621         if (ecwr_handle) {
 622                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 623                         return 0;
 624         } else {
 625                 if (ec_write(i, v) < 0)
 626                         return 0;
 627         }
 628
 629         return 1;
 630 }
 631
 632 static int issue_thinkpad_cmos_command(int cmos_cmd)
 633 {
 634         if (!cmos_handle)
 635                 return -ENXIO;
 636
 637         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 638                 return -EIO;
 639
 640         return 0;
 641 }
 642
 643 /*************************************************************************
 644  * ACPI device model
 645  */
 646
 647 #define TPACPI_ACPIHANDLE_INIT(object) \
 648         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 649                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 650
 651 static void drv_acpi_handle_init(char *name,
 652                            acpi_handle *handle, acpi_handle parent,
 653                            char **paths, int num_paths, char **path)
 654 {
 655         int i;
 656         acpi_status status;
 657
 658         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 659                 name);
 660
 661         for (i = 0; i < num_paths; i++) {
 662                 status = acpi_get_handle(parent, paths[i], handle);
 663                 if (ACPI_SUCCESS(status)) {
 664                         *path = paths[i];
 665                         dbg_printk(TPACPI_DBG_INIT,
 666                                    "Found ACPI handle %s for %s\n",
 667                                    *path, name);
 668                         return;
 669                 }
 670         }
 671
 672         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 673                     name);
 674         *handle = NULL;
 675 }
 676
 677 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 678 {
 679         struct ibm_struct *ibm = data;
 680
 681         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 682                 return;
 683
 684         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 685                 return;
 686
 687         ibm->acpi->notify(ibm, event);
 688 }
 689
 690 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 691 {
 692         acpi_status status;
 693         int rc;
 694
 695         BUG_ON(!ibm->acpi);
 696
 697         if (!*ibm->acpi->handle)
 698                 return 0;
 699
 700         vdbg_printk(TPACPI_DBG_INIT,
 701                 "setting up ACPI notify for %s\n", ibm->name);
 702
 703         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 704         if (rc < 0) {
 705                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 706                         ibm->name, rc);
 707                 return -ENODEV;
 708         }
 709
 710         ibm->acpi->device->driver_data = ibm;
 711         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 712                 TPACPI_ACPI_EVENT_PREFIX,
 713                 ibm->name);
 714
 715         status = acpi_install_notify_handler(*ibm->acpi->handle,
 716                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 717         if (ACPI_FAILURE(status)) {
 718                 if (status == AE_ALREADY_EXISTS) {
 719                         printk(TPACPI_NOTICE
 720                                "another device driver is already "
 721                                "handling %s events\n", ibm->name);
 722                 } else {
 723                         printk(TPACPI_ERR
 724                                "acpi_install_notify_handler(%s) failed: %d\n",
 725                                ibm->name, status);
 726                 }
 727                 return -ENODEV;
 728         }
 729         ibm->flags.acpi_notify_installed = 1;
 730         return 0;
 731 }
 732
 733 static int __init tpacpi_device_add(struct acpi_device *device)
 734 {
 735         return 0;
 736 }
 737
 738 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 739 {
 740         int rc;
 741
 742         dbg_printk(TPACPI_DBG_INIT,
 743                 "registering %s as an ACPI driver\n", ibm->name);
 744
 745         BUG_ON(!ibm->acpi);
 746
 747         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 748         if (!ibm->acpi->driver) {
 749                 printk(TPACPI_ERR
 750                        "failed to allocate memory for ibm->acpi->driver\n");
 751                 return -ENOMEM;
 752         }
 753
 754         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 755         ibm->acpi->driver->ids = ibm->acpi->hid;
 756
 757         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 758
 759         rc = acpi_bus_register_driver(ibm->acpi->driver);
 760         if (rc < 0) {
 761                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 762                        ibm->name, rc);
 763                 kfree(ibm->acpi->driver);
 764                 ibm->acpi->driver = NULL;
 765         } else if (!rc)
 766                 ibm->flags.acpi_driver_registered = 1;
 767
 768         return rc;
 769 }
 770
 771
 772 /****************************************************************************
 773  ****************************************************************************
 774  *
 775  * Procfs Helpers
 776  *
 777  ****************************************************************************
 778  ****************************************************************************/
 779
 780 static int dispatch_procfs_read(char *page, char **start, off_t off,
 781                         int count, int *eof, void *data)
 782 {
 783         struct ibm_struct *ibm = data;
 784         int len;
 785
 786         if (!ibm || !ibm->read)
 787                 return -EINVAL;
 788
 789         len = ibm->read(page);
 790         if (len < 0)
 791                 return len;
 792
 793         if (len <= off + count)
 794                 *eof = 1;
 795         *start = page + off;
 796         len -= off;
 797         if (len > count)
 798                 len = count;
 799         if (len < 0)
 800                 len = 0;
 801
 802         return len;
 803 }
 804
 805 static int dispatch_procfs_write(struct file *file,
 806                         const char __user *userbuf,
 807                         unsigned long count, void *data)
 808 {
 809         struct ibm_struct *ibm = data;
 810         char *kernbuf;
 811         int ret;
 812
 813         if (!ibm || !ibm->write)
 814                 return -EINVAL;
 815         if (count > PAGE_SIZE - 2)
 816                 return -EINVAL;
 817
 818         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 819         if (!kernbuf)
 820                 return -ENOMEM;
 821
 822         if (copy_from_user(kernbuf, userbuf, count)) {
 823                 kfree(kernbuf);
 824                 return -EFAULT;
 825         }
 826
 827         kernbuf[count] = 0;
 828         strcat(kernbuf, ",");
 829         ret = ibm->write(kernbuf);
 830         if (ret == 0)
 831                 ret = count;
 832
 833         kfree(kernbuf);
 834
 835         return ret;
 836 }
 837
 838 static char *next_cmd(char **cmds)
 839 {
 840         char *start = *cmds;
 841         char *end;
 842
 843         while ((end = strchr(start, ',')) && end == start)
 844                 start = end + 1;
 845
 846         if (!end)
 847                 return NULL;
 848
 849         *end = 0;
 850         *cmds = end + 1;
 851         return start;
 852 }
 853
 854
 855 /****************************************************************************
 856  ****************************************************************************
 857  *
 858  * Device model: input, hwmon and platform
 859  *
 860  ****************************************************************************
 861  ****************************************************************************/
 862
 863 static struct platform_device *tpacpi_pdev;
 864 static struct platform_device *tpacpi_sensors_pdev;
 865 static struct device *tpacpi_hwmon;
 866 static struct input_dev *tpacpi_inputdev;
 867 static struct mutex tpacpi_inputdev_send_mutex;
 868 static LIST_HEAD(tpacpi_all_drivers);
 869
 870 static int tpacpi_suspend_handler(struct platform_device *pdev,
 871                                   pm_message_t state)
 872 {
 873         struct ibm_struct *ibm, *itmp;
 874
 875         list_for_each_entry_safe(ibm, itmp,
 876                                  &tpacpi_all_drivers,
 877                                  all_drivers) {
 878                 if (ibm->suspend)
 879                         (ibm->suspend)(state);
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int tpacpi_resume_handler(struct platform_device *pdev)
 886 {
 887         struct ibm_struct *ibm, *itmp;
 888
 889         list_for_each_entry_safe(ibm, itmp,
 890                                  &tpacpi_all_drivers,
 891                                  all_drivers) {
 892                 if (ibm->resume)
 893                         (ibm->resume)();
 894         }
 895
 896         return 0;
 897 }
 898
 899 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 900 {
 901         struct ibm_struct *ibm, *itmp;
 902
 903         list_for_each_entry_safe(ibm, itmp,
 904                                  &tpacpi_all_drivers,
 905                                  all_drivers) {
 906                 if (ibm->shutdown)
 907                         (ibm->shutdown)();
 908         }
 909 }
 910
 911 static struct platform_driver tpacpi_pdriver = {
 912         .driver = {
 913                 .name = TPACPI_DRVR_NAME,
 914                 .owner = THIS_MODULE,
 915         },
 916         .suspend = tpacpi_suspend_handler,
 917         .resume = tpacpi_resume_handler,
 918         .shutdown = tpacpi_shutdown_handler,
 919 };
 920
 921 static struct platform_driver tpacpi_hwmon_pdriver = {
 922         .driver = {
 923                 .name = TPACPI_HWMON_DRVR_NAME,
 924                 .owner = THIS_MODULE,
 925         },
 926 };
 927
 928 /*************************************************************************
 929  * sysfs support helpers
 930  */
 931
 932 struct attribute_set {
 933         unsigned int members, max_members;
 934         struct attribute_group group;
 935 };
 936
 937 struct attribute_set_obj {
 938         struct attribute_set s;
 939         struct attribute *a;
 940 } __attribute__((packed));
 941
 942 static struct attribute_set *create_attr_set(unsigned int max_members,
 943                                                 const char *name)
 944 {
 945         struct attribute_set_obj *sobj;
 946
 947         if (max_members == 0)
 948                 return NULL;
 949
 950         /* Allocates space for implicit NULL at the end too */
 951         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 952                     max_members * sizeof(struct attribute *),
 953                     GFP_KERNEL);
 954         if (!sobj)
 955                 return NULL;
 956         sobj->s.max_members = max_members;
 957         sobj->s.group.attrs = &sobj->a;
 958         sobj->s.group.name = name;
 959
 960         return &sobj->s;
 961 }
 962
 963 #define destroy_attr_set(_set) \
 964         kfree(_set);
 965
 966 /* not multi-threaded safe, use it in a single thread per set */
 967 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 968 {
 969         if (!s || !attr)
 970                 return -EINVAL;
 971
 972         if (s->members >= s->max_members)
 973                 return -ENOMEM;
 974
 975         s->group.attrs[s->members] = attr;
 976         s->members++;
 977
 978         return 0;
 979 }
 980
 981 static int add_many_to_attr_set(struct attribute_set *s,
 982                         struct attribute **attr,
 983                         unsigned int count)
 984 {
 985         int i, res;
 986
 987         for (i = 0; i < count; i++) {
 988                 res = add_to_attr_set(s, attr[i]);
 989                 if (res)
 990                         return res;
 991         }
 992
 993         return 0;
 994 }
 995
 996 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 997 {
 998         sysfs_remove_group(kobj, &s->group);
 999         destroy_attr_set(s);
1000 }
1001
1002 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1003         sysfs_create_group(_kobj, &_attr_set->group)
1004
1005 static int parse_strtoul(const char *buf,
1006                 unsigned long max, unsigned long *value)
1007 {
1008         char *endp;
1009
1010         while (*buf && isspace(*buf))
1011                 buf++;
1012         *value = simple_strtoul(buf, &endp, 0);
1013         while (*endp && isspace(*endp))
1014                 endp++;
1015         if (*endp || *value > max)
1016                 return -EINVAL;
1017
1018         return 0;
1019 }
1020
1021 static void tpacpi_disable_brightness_delay(void)
1022 {
1023         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1024                 printk(TPACPI_NOTICE
1025                         "ACPI backlight control delay disabled\n");
1026 }
1027
1028 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1029 {
1030         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1031         union acpi_object *obj;
1032         int rc;
1033
1034         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1035                 obj = (union acpi_object *)buffer.pointer;
1036                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1037                         printk(TPACPI_ERR "Unknown _BCL data, "
1038                                "please report this to %s\n", TPACPI_MAIL);
1039                         rc = 0;
1040                 } else {
1041                         rc = obj->package.count;
1042                 }
1043         } else {
1044                 return 0;
1045         }
1046
1047         kfree(buffer.pointer);
1048         return rc;
1049 }
1050
1051 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1052                                         u32 lvl, void *context, void **rv)
1053 {
1054         char name[ACPI_PATH_SEGMENT_LENGTH];
1055         struct acpi_buffer buffer = { sizeof(name), &name };
1056
1057         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1058             !strncmp("_BCL", name, sizeof(name) - 1)) {
1059                 BUG_ON(!rv || !*rv);
1060                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1061                 return AE_CTRL_TERMINATE;
1062         } else {
1063                 return AE_OK;
1064         }
1065 }
1066
1067 /*
1068  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1069  */
1070 static int __init tpacpi_check_std_acpi_brightness_support(void)
1071 {
1072         int status;
1073         int bcl_levels = 0;
1074         void *bcl_ptr = &bcl_levels;
1075
1076         if (!vid_handle) {
1077                 TPACPI_ACPIHANDLE_INIT(vid);
1078         }
1079         if (!vid_handle)
1080                 return 0;
1081
1082         /*
1083          * Search for a _BCL method, and execute it.  This is safe on all
1084          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1085          * BIOS in ACPI backlight control mode.  We do NOT have to care
1086          * about calling the _BCL method in an enabled video device, any
1087          * will do for our purposes.
1088          */
1089
1090         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1091                                      tpacpi_acpi_walk_find_bcl, NULL,
1092                                      &bcl_ptr);
1093
1094         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1095                 tp_features.bright_acpimode = 1;
1096                 return (bcl_levels - 2);
1097         }
1098
1099         return 0;
1100 }
1101
1102 static void printk_deprecated_attribute(const char * const what,
1103                                         const char * const details)
1104 {
1105         tpacpi_log_usertask("deprecated sysfs attribute");
1106         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1107                 "will be removed. %s\n",
1108                 what, details);
1109 }
1110
1111 /*************************************************************************
1112  * rfkill and radio control support helpers
1113  */
1114
1115 /*
1116  * ThinkPad-ACPI firmware handling model:
1117  *
1118  * WLSW (master wireless switch) is event-driven, and is common to all
1119  * firmware-controlled radios.  It cannot be controlled, just monitored,
1120  * as expected.  It overrides all radio state in firmware
1121  *
1122  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1123  * (TODO: verify how WLSW interacts with the returned radio state).
1124  *
1125  * The only time there are shadow radio state changes, is when
1126  * masked-off hotkeys are used.
1127  */
1128
1129 /*
1130  * Internal driver API for radio state:
1131  *
1132  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1133  * bool: true means radio blocked (off)
1134  */
1135 enum tpacpi_rfkill_state {
1136         TPACPI_RFK_RADIO_OFF = 0,
1137         TPACPI_RFK_RADIO_ON
1138 };
1139
1140 /* rfkill switches */
1141 enum tpacpi_rfk_id {
1142         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1143         TPACPI_RFK_WWAN_SW_ID,
1144         TPACPI_RFK_UWB_SW_ID,
1145         TPACPI_RFK_SW_MAX
1146 };
1147
1148 static const char *tpacpi_rfkill_names[] = {
1149         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1150         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1151         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1152         [TPACPI_RFK_SW_MAX] = NULL
1153 };
1154
1155 /* ThinkPad-ACPI rfkill subdriver */
1156 struct tpacpi_rfk {
1157         struct rfkill *rfkill;
1158         enum tpacpi_rfk_id id;
1159         const struct tpacpi_rfk_ops *ops;
1160 };
1161
1162 struct tpacpi_rfk_ops {
1163         /* firmware interface */
1164         int (*get_status)(void);
1165         int (*set_status)(const enum tpacpi_rfkill_state);
1166 };
1167
1168 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1169
1170 /* Query FW and update rfkill sw state for a given rfkill switch */
1171 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1172 {
1173         int status;
1174
1175         if (!tp_rfk)
1176                 return -ENODEV;
1177
1178         status = (tp_rfk->ops->get_status)();
1179         if (status < 0)
1180                 return status;
1181
1182         rfkill_set_sw_state(tp_rfk->rfkill,
1183                             (status == TPACPI_RFK_RADIO_OFF));
1184
1185         return status;
1186 }
1187
1188 /* Query FW and update rfkill sw state for all rfkill switches */
1189 static void tpacpi_rfk_update_swstate_all(void)
1190 {
1191         unsigned int i;
1192
1193         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1194                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1195 }
1196
1197 /*
1198  * Sync the HW-blocking state of all rfkill switches,
1199  * do notice it causes the rfkill core to schedule uevents
1200  */
1201 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1202 {
1203         unsigned int i;
1204         struct tpacpi_rfk *tp_rfk;
1205
1206         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1207                 tp_rfk = tpacpi_rfkill_switches[i];
1208                 if (tp_rfk) {
1209                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1210                                                 blocked)) {
1211                                 /* ignore -- we track sw block */
1212                         }
1213                 }
1214         }
1215 }
1216
1217 /* Call to get the WLSW state from the firmware */
1218 static int hotkey_get_wlsw(void);
1219
1220 /* Call to query WLSW state and update all rfkill switches */
1221 static bool tpacpi_rfk_check_hwblock_state(void)
1222 {
1223         int res = hotkey_get_wlsw();
1224         int hw_blocked;
1225
1226         /* When unknown or unsupported, we have to assume it is unblocked */
1227         if (res < 0)
1228                 return false;
1229
1230         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1231         tpacpi_rfk_update_hwblock_state(hw_blocked);
1232
1233         return hw_blocked;
1234 }
1235
1236 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1237 {
1238         struct tpacpi_rfk *tp_rfk = data;
1239         int res;
1240
1241         dbg_printk(TPACPI_DBG_RFKILL,
1242                    "request to change radio state to %s\n",
1243                    blocked ? "blocked" : "unblocked");
1244
1245         /* try to set radio state */
1246         res = (tp_rfk->ops->set_status)(blocked ?
1247                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1248
1249         /* and update the rfkill core with whatever the FW really did */
1250         tpacpi_rfk_update_swstate(tp_rfk);
1251
1252         return (res < 0) ? res : 0;
1253 }
1254
1255 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1256         .set_block = tpacpi_rfk_hook_set_block,
1257 };
1258
1259 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1260                         const struct tpacpi_rfk_ops *tp_rfkops,
1261                         const enum rfkill_type rfktype,
1262                         const char *name,
1263                         const bool set_default)
1264 {
1265         struct tpacpi_rfk *atp_rfk;
1266         int res;
1267         bool sw_state = false;
1268         bool hw_state;
1269         int sw_status;
1270
1271         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1272
1273         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1274         if (atp_rfk)
1275                 atp_rfk->rfkill = rfkill_alloc(name,
1276                                                 &tpacpi_pdev->dev,
1277                                                 rfktype,
1278                                                 &tpacpi_rfk_rfkill_ops,
1279                                                 atp_rfk);
1280         if (!atp_rfk || !atp_rfk->rfkill) {
1281                 printk(TPACPI_ERR
1282                         "failed to allocate memory for rfkill class\n");
1283                 kfree(atp_rfk);
1284                 return -ENOMEM;
1285         }
1286
1287         atp_rfk->id = id;
1288         atp_rfk->ops = tp_rfkops;
1289
1290         sw_status = (tp_rfkops->get_status)();
1291         if (sw_status < 0) {
1292                 printk(TPACPI_ERR
1293                         "failed to read initial state for %s, error %d\n",
1294                         name, sw_status);
1295         } else {
1296                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1297                 if (set_default) {
1298                         /* try to keep the initial state, since we ask the
1299                          * firmware to preserve it across S5 in NVRAM */
1300                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1301                 }
1302         }
1303         hw_state = tpacpi_rfk_check_hwblock_state();
1304         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1305
1306         res = rfkill_register(atp_rfk->rfkill);
1307         if (res < 0) {
1308                 printk(TPACPI_ERR
1309                         "failed to register %s rfkill switch: %d\n",
1310                         name, res);
1311                 rfkill_destroy(atp_rfk->rfkill);
1312                 kfree(atp_rfk);
1313                 return res;
1314         }
1315
1316         tpacpi_rfkill_switches[id] = atp_rfk;
1317
1318         printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1319                 name, (sw_state || hw_state) ? "" : "un");
1320         return 0;
1321 }
1322
1323 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1324 {
1325         struct tpacpi_rfk *tp_rfk;
1326
1327         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1328
1329         tp_rfk = tpacpi_rfkill_switches[id];
1330         if (tp_rfk) {
1331                 rfkill_unregister(tp_rfk->rfkill);
1332                 rfkill_destroy(tp_rfk->rfkill);
1333                 tpacpi_rfkill_switches[id] = NULL;
1334                 kfree(tp_rfk);
1335         }
1336 }
1337
1338 static void printk_deprecated_rfkill_attribute(const char * const what)
1339 {
1340         printk_deprecated_attribute(what,
1341                         "Please switch to generic rfkill before year 2010");
1342 }
1343
1344 /* sysfs <radio> enable ------------------------------------------------ */
1345 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1346                                             struct device_attribute *attr,
1347                                             char *buf)
1348 {
1349         int status;
1350
1351         printk_deprecated_rfkill_attribute(attr->attr.name);
1352
1353         /* This is in the ABI... */
1354         if (tpacpi_rfk_check_hwblock_state()) {
1355                 status = TPACPI_RFK_RADIO_OFF;
1356         } else {
1357                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1358                 if (status < 0)
1359                         return status;
1360         }
1361
1362         return snprintf(buf, PAGE_SIZE, "%d\n",
1363                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1364 }
1365
1366 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1367                             struct device_attribute *attr,
1368                             const char *buf, size_t count)
1369 {
1370         unsigned long t;
1371         int res;
1372
1373         printk_deprecated_rfkill_attribute(attr->attr.name);
1374
1375         if (parse_strtoul(buf, 1, &t))
1376                 return -EINVAL;
1377
1378         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1379
1380         /* This is in the ABI... */
1381         if (tpacpi_rfk_check_hwblock_state() && !!t)
1382                 return -EPERM;
1383
1384         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1385                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1386         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1387
1388         return (res < 0) ? res : count;
1389 }
1390
1391 /* procfs -------------------------------------------------------------- */
1392 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1393 {
1394         int len = 0;
1395
1396         if (id >= TPACPI_RFK_SW_MAX)
1397                 len += sprintf(p + len, "status:\t\tnot supported\n");
1398         else {
1399                 int status;
1400
1401                 /* This is in the ABI... */
1402                 if (tpacpi_rfk_check_hwblock_state()) {
1403                         status = TPACPI_RFK_RADIO_OFF;
1404                 } else {
1405                         status = tpacpi_rfk_update_swstate(
1406                                                 tpacpi_rfkill_switches[id]);
1407                         if (status < 0)
1408                                 return status;
1409                 }
1410
1411                 len += sprintf(p + len, "status:\t\t%s\n",
1412                                 (status == TPACPI_RFK_RADIO_ON) ?
1413                                         "enabled" : "disabled");
1414                 len += sprintf(p + len, "commands:\tenable, disable\n");
1415         }
1416
1417         return len;
1418 }
1419
1420 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1421 {
1422         char *cmd;
1423         int status = -1;
1424         int res = 0;
1425
1426         if (id >= TPACPI_RFK_SW_MAX)
1427                 return -ENODEV;
1428
1429         while ((cmd = next_cmd(&buf))) {
1430                 if (strlencmp(cmd, "enable") == 0)
1431                         status = TPACPI_RFK_RADIO_ON;
1432                 else if (strlencmp(cmd, "disable") == 0)
1433                         status = TPACPI_RFK_RADIO_OFF;
1434                 else
1435                         return -EINVAL;
1436         }
1437
1438         if (status != -1) {
1439                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1440                                 (status == TPACPI_RFK_RADIO_ON) ?
1441                                                 "enable" : "disable",
1442                                 tpacpi_rfkill_names[id]);
1443                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1444                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1445         }
1446
1447         return res;
1448 }
1449
1450 /*************************************************************************
1451  * thinkpad-acpi driver attributes
1452  */
1453
1454 /* interface_version --------------------------------------------------- */
1455 static ssize_t tpacpi_driver_interface_version_show(
1456                                 struct device_driver *drv,
1457                                 char *buf)
1458 {
1459         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1460 }
1461
1462 static DRIVER_ATTR(interface_version, S_IRUGO,
1463                 tpacpi_driver_interface_version_show, NULL);
1464
1465 /* debug_level --------------------------------------------------------- */
1466 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1467                                                 char *buf)
1468 {
1469         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1470 }
1471
1472 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1473                                                 const char *buf, size_t count)
1474 {
1475         unsigned long t;
1476
1477         if (parse_strtoul(buf, 0xffff, &t))
1478                 return -EINVAL;
1479
1480         dbg_level = t;
1481
1482         return count;
1483 }
1484
1485 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1486                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1487
1488 /* version ------------------------------------------------------------- */
1489 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1490                                                 char *buf)
1491 {
1492         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1493                         TPACPI_DESC, TPACPI_VERSION);
1494 }
1495
1496 static DRIVER_ATTR(version, S_IRUGO,
1497                 tpacpi_driver_version_show, NULL);
1498
1499 /* --------------------------------------------------------------------- */
1500
1501 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1502
1503 /* wlsw_emulstate ------------------------------------------------------ */
1504 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1505                                                 char *buf)
1506 {
1507         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1508 }
1509
1510 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1511                                                 const char *buf, size_t count)
1512 {
1513         unsigned long t;
1514
1515         if (parse_strtoul(buf, 1, &t))
1516                 return -EINVAL;
1517
1518         if (tpacpi_wlsw_emulstate != !!t) {
1519                 tpacpi_wlsw_emulstate = !!t;
1520                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1521         }
1522
1523         return count;
1524 }
1525
1526 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1527                 tpacpi_driver_wlsw_emulstate_show,
1528                 tpacpi_driver_wlsw_emulstate_store);
1529
1530 /* bluetooth_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1532                                         struct device_driver *drv,
1533                                         char *buf)
1534 {
1535         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1539                                         struct device_driver *drv,
1540                                         const char *buf, size_t count)
1541 {
1542         unsigned long t;
1543
1544         if (parse_strtoul(buf, 1, &t))
1545                 return -EINVAL;
1546
1547         tpacpi_bluetooth_emulstate = !!t;
1548
1549         return count;
1550 }
1551
1552 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1553                 tpacpi_driver_bluetooth_emulstate_show,
1554                 tpacpi_driver_bluetooth_emulstate_store);
1555
1556 /* wwan_emulstate ------------------------------------------------- */
1557 static ssize_t tpacpi_driver_wwan_emulstate_show(
1558                                         struct device_driver *drv,
1559                                         char *buf)
1560 {
1561         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1562 }
1563
1564 static ssize_t tpacpi_driver_wwan_emulstate_store(
1565                                         struct device_driver *drv,
1566                                         const char *buf, size_t count)
1567 {
1568         unsigned long t;
1569
1570         if (parse_strtoul(buf, 1, &t))
1571                 return -EINVAL;
1572
1573         tpacpi_wwan_emulstate = !!t;
1574
1575         return count;
1576 }
1577
1578 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1579                 tpacpi_driver_wwan_emulstate_show,
1580                 tpacpi_driver_wwan_emulstate_store);
1581
1582 /* uwb_emulstate ------------------------------------------------- */
1583 static ssize_t tpacpi_driver_uwb_emulstate_show(
1584                                         struct device_driver *drv,
1585                                         char *buf)
1586 {
1587         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1588 }
1589
1590 static ssize_t tpacpi_driver_uwb_emulstate_store(
1591                                         struct device_driver *drv,
1592                                         const char *buf, size_t count)
1593 {
1594         unsigned long t;
1595
1596         if (parse_strtoul(buf, 1, &t))
1597                 return -EINVAL;
1598
1599         tpacpi_uwb_emulstate = !!t;
1600
1601         return count;
1602 }
1603
1604 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1605                 tpacpi_driver_uwb_emulstate_show,
1606                 tpacpi_driver_uwb_emulstate_store);
1607 #endif
1608
1609 /* --------------------------------------------------------------------- */
1610
1611 static struct driver_attribute *tpacpi_driver_attributes[] = {
1612         &driver_attr_debug_level, &driver_attr_version,
1613         &driver_attr_interface_version,
1614 };
1615
1616 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1617 {
1618         int i, res;
1619
1620         i = 0;
1621         res = 0;
1622         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1623                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1624                 i++;
1625         }
1626
1627 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1628         if (!res && dbg_wlswemul)
1629                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1630         if (!res && dbg_bluetoothemul)
1631                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1632         if (!res && dbg_wwanemul)
1633                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1634         if (!res && dbg_uwbemul)
1635                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1636 #endif
1637
1638         return res;
1639 }
1640
1641 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1642 {
1643         int i;
1644
1645         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1646                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1647
1648 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1649         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1650         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1651         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1652         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1653 #endif
1654 }
1655
1656 /*************************************************************************
1657  * Firmware Data
1658  */
1659
1660 /*
1661  * Table of recommended minimum BIOS versions
1662  *
1663  * Reasons for listing:
1664  *    1. Stable BIOS, listed because the unknown ammount of
1665  *       bugs and bad ACPI behaviour on older versions
1666  *
1667  *    2. BIOS or EC fw with known bugs that trigger on Linux
1668  *
1669  *    3. BIOS with known reduced functionality in older versions
1670  *
1671  *  We recommend the latest BIOS and EC version.
1672  *  We only support the latest BIOS and EC fw version as a rule.
1673  *
1674  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1675  *  Information from users in ThinkWiki
1676  *
1677  *  WARNING: we use this table also to detect that the machine is
1678  *  a ThinkPad in some cases, so don't remove entries lightly.
1679  */
1680
1681 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1682         { .vendor       = (__v),                        \
1683           .bios         = TPID(__id1, __id2),           \
1684           .ec           = TPACPI_MATCH_ANY,             \
1685           .quirks       = TPACPI_MATCH_ANY << 16        \
1686                           | (__bv1) << 8 | (__bv2) }
1687
1688 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1689                 __eid, __ev1, __ev2)                    \
1690         { .vendor       = (__v),                        \
1691           .bios         = TPID(__bid1, __bid2),         \
1692           .ec           = __eid,                        \
1693           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1694                           | (__bv1) << 8 | (__bv2) }
1695
1696 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1697         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1698
1699 /* Outdated IBM BIOSes often lack the EC id string */
1700 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1701         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1702                 __bv1, __bv2, TPID(__id1, __id2),       \
1703                 __ev1, __ev2),                          \
1704         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1705                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1706                 __ev1, __ev2)
1707
1708 /* Outdated IBM BIOSes often lack the EC id string */
1709 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1710                 __eid1, __eid2, __ev1, __ev2)           \
1711         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1712                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1713                 __ev1, __ev2),                          \
1714         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1715                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1716                 __ev1, __ev2)
1717
1718 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1719         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1720
1721 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1722         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1723                 __bv1, __bv2, TPID(__id1, __id2),       \
1724                 __ev1, __ev2)
1725
1726 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1727                 __eid1, __eid2, __ev1, __ev2)           \
1728         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1729                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1730                 __ev1, __ev2)
1731
1732 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1733         /*  Numeric models ------------------ */
1734         /*      FW MODEL   BIOS VERS          */
1735         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1736         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1737         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1738         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1739         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1740         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1741         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1742         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1743         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1744
1745         /* A-series ------------------------- */
1746         /*      FW MODEL   BIOS VERS  EC VERS */
1747         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1748         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1749         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1750         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1751         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1752         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1753         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1754         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1755         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1756         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1757         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1758
1759         /* G-series ------------------------- */
1760         /*      FW MODEL   BIOS VERS          */
1761         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1762         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1763
1764         /* R-series, T-series --------------- */
1765         /*      FW MODEL   BIOS VERS  EC VERS */
1766         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1767         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1768         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1769         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1770         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1771         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1772         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1773                                                     T40/p, T41/p, T42/p (1) */
1774         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1775         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1776         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1777         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1778
1779         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1780         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1781         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1782         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1783         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1784         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1785
1786         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1787         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1788         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1789
1790         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1791         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1792         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1793
1794         /* X-series ------------------------- */
1795         /*      FW MODEL   BIOS VERS  EC VERS */
1796         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1797         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1798         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1799         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1800         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1801         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1802         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1803
1804         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1805         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1806
1807         /* (0) - older versions lack DMI EC fw string and functionality */
1808         /* (1) - older versions known to lack functionality */
1809 };
1810
1811 #undef TPV_QL1
1812 #undef TPV_QL0
1813 #undef TPV_QI2
1814 #undef TPV_QI1
1815 #undef TPV_QI0
1816 #undef TPV_Q_X
1817 #undef TPV_Q
1818
1819 static void __init tpacpi_check_outdated_fw(void)
1820 {
1821         unsigned long fwvers;
1822         u16 ec_version, bios_version;
1823
1824         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1825                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1826
1827         if (!fwvers)
1828                 return;
1829
1830         bios_version = fwvers & 0xffffU;
1831         ec_version = (fwvers >> 16) & 0xffffU;
1832
1833         /* note that unknown versions are set to 0x0000 and we use that */
1834         if ((bios_version > thinkpad_id.bios_release) ||
1835             (ec_version > thinkpad_id.ec_release &&
1836                                 ec_version != TPACPI_MATCH_ANY)) {
1837                 /*
1838                  * The changelogs would let us track down the exact
1839                  * reason, but it is just too much of a pain to track
1840                  * it.  We only list BIOSes that are either really
1841                  * broken, or really stable to begin with, so it is
1842                  * best if the user upgrades the firmware anyway.
1843                  */
1844                 printk(TPACPI_WARN
1845                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1846                 printk(TPACPI_WARN
1847                         "WARNING: This firmware may be missing critical bug "
1848                         "fixes and/or important features\n");
1849         }
1850 }
1851
1852 static bool __init tpacpi_is_fw_known(void)
1853 {
1854         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1855                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1856 }
1857
1858 /****************************************************************************
1859  ****************************************************************************
1860  *
1861  * Subdrivers
1862  *
1863  ****************************************************************************
1864  ****************************************************************************/
1865
1866 /*************************************************************************
1867  * thinkpad-acpi init subdriver
1868  */
1869
1870 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1871 {
1872         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1873         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1874
1875         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1876                 (thinkpad_id.bios_version_str) ?
1877                         thinkpad_id.bios_version_str : "unknown",
1878                 (thinkpad_id.ec_version_str) ?
1879                         thinkpad_id.ec_version_str : "unknown");
1880
1881         if (thinkpad_id.vendor && thinkpad_id.model_str)
1882                 printk(TPACPI_INFO "%s %s, model %s\n",
1883                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1884                                 "IBM" : ((thinkpad_id.vendor ==
1885                                                 PCI_VENDOR_ID_LENOVO) ?
1886                                         "Lenovo" : "Unknown vendor"),
1887                         thinkpad_id.model_str,
1888                         (thinkpad_id.nummodel_str) ?
1889                                 thinkpad_id.nummodel_str : "unknown");
1890
1891         tpacpi_check_outdated_fw();
1892         return 0;
1893 }
1894
1895 static int thinkpad_acpi_driver_read(char *p)
1896 {
1897         int len = 0;
1898
1899         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1900         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1901
1902         return len;
1903 }
1904
1905 static struct ibm_struct thinkpad_acpi_driver_data = {
1906         .name = "driver",
1907         .read = thinkpad_acpi_driver_read,
1908 };
1909
1910 /*************************************************************************
1911  * Hotkey subdriver
1912  */
1913
1914 /*
1915  * ThinkPad firmware event model
1916  *
1917  * The ThinkPad firmware has two main event interfaces: normal ACPI
1918  * notifications (which follow the ACPI standard), and a private event
1919  * interface.
1920  *
1921  * The private event interface also issues events for the hotkeys.  As
1922  * the driver gained features, the event handling code ended up being
1923  * built around the hotkey subdriver.  This will need to be refactored
1924  * to a more formal event API eventually.
1925  *
1926  * Some "hotkeys" are actually supposed to be used as event reports,
1927  * such as "brightness has changed", "volume has changed", depending on
1928  * the ThinkPad model and how the firmware is operating.
1929  *
1930  * Unlike other classes, hotkey-class events have mask/unmask control on
1931  * non-ancient firmware.  However, how it behaves changes a lot with the
1932  * firmware model and version.
1933  */
1934
1935 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1936         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1937         TP_ACPI_HOTKEYSCAN_FNF2,
1938         TP_ACPI_HOTKEYSCAN_FNF3,
1939         TP_ACPI_HOTKEYSCAN_FNF4,
1940         TP_ACPI_HOTKEYSCAN_FNF5,
1941         TP_ACPI_HOTKEYSCAN_FNF6,
1942         TP_ACPI_HOTKEYSCAN_FNF7,
1943         TP_ACPI_HOTKEYSCAN_FNF8,
1944         TP_ACPI_HOTKEYSCAN_FNF9,
1945         TP_ACPI_HOTKEYSCAN_FNF10,
1946         TP_ACPI_HOTKEYSCAN_FNF11,
1947         TP_ACPI_HOTKEYSCAN_FNF12,
1948         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1949         TP_ACPI_HOTKEYSCAN_FNINSERT,
1950         TP_ACPI_HOTKEYSCAN_FNDELETE,
1951         TP_ACPI_HOTKEYSCAN_FNHOME,
1952         TP_ACPI_HOTKEYSCAN_FNEND,
1953         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1954         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1955         TP_ACPI_HOTKEYSCAN_FNSPACE,
1956         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1957         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1958         TP_ACPI_HOTKEYSCAN_MUTE,
1959         TP_ACPI_HOTKEYSCAN_THINKPAD,
1960 };
1961
1962 enum {  /* Keys/events available through NVRAM polling */
1963         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1964         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1965 };
1966
1967 enum {  /* Positions of some of the keys in hotkey masks */
1968         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1969         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1970         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1971         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1972         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1973         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1974         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1975         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1976         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1977         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1978         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1979 };
1980
1981 enum {  /* NVRAM to ACPI HKEY group map */
1982         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1983                                           TP_ACPI_HKEY_ZOOM_MASK |
1984                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1985                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1986         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1987                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1988         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1989                                           TP_ACPI_HKEY_VOLDWN_MASK |
1990                                           TP_ACPI_HKEY_MUTE_MASK,
1991 };
1992
1993 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1994 struct tp_nvram_state {
1995        u16 thinkpad_toggle:1;
1996        u16 zoom_toggle:1;
1997        u16 display_toggle:1;
1998        u16 thinklight_toggle:1;
1999        u16 hibernate_toggle:1;
2000        u16 displayexp_toggle:1;
2001        u16 display_state:1;
2002        u16 brightness_toggle:1;
2003        u16 volume_toggle:1;
2004        u16 mute:1;
2005
2006        u8 brightness_level;
2007        u8 volume_level;
2008 };
2009
2010 /* kthread for the hotkey poller */
2011 static struct task_struct *tpacpi_hotkey_task;
2012
2013 /* Acquired while the poller kthread is running, use to sync start/stop */
2014 static struct mutex hotkey_thread_mutex;
2015
2016 /*
2017  * Acquire mutex to write poller control variables as an
2018  * atomic block.
2019  *
2020  * Increment hotkey_config_change when changing them if you
2021  * want the kthread to forget old state.
2022  *
2023  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2024  */
2025 static struct mutex hotkey_thread_data_mutex;
2026 static unsigned int hotkey_config_change;
2027
2028 /*
2029  * hotkey poller control variables
2030  *
2031  * Must be atomic or readers will also need to acquire mutex
2032  *
2033  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2034  * should be used only when the changes need to be taken as
2035  * a block, OR when one needs to force the kthread to forget
2036  * old state.
2037  */
2038 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2039 static unsigned int hotkey_poll_freq = 10; /* Hz */
2040
2041 #define HOTKEY_CONFIG_CRITICAL_START \
2042         do { \
2043                 mutex_lock(&hotkey_thread_data_mutex); \
2044                 hotkey_config_change++; \
2045         } while (0);
2046 #define HOTKEY_CONFIG_CRITICAL_END \
2047         mutex_unlock(&hotkey_thread_data_mutex);
2048
2049 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2050
2051 #define hotkey_source_mask 0U
2052 #define HOTKEY_CONFIG_CRITICAL_START
2053 #define HOTKEY_CONFIG_CRITICAL_END
2054
2055 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2056
2057 static struct mutex hotkey_mutex;
2058
2059 static enum {   /* Reasons for waking up */
2060         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2061         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2062         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2063 } hotkey_wakeup_reason;
2064
2065 static int hotkey_autosleep_ack;
2066
2067 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2068 static u32 hotkey_all_mask;             /* all events supported in fw */
2069 static u32 hotkey_reserved_mask;        /* events better left disabled */
2070 static u32 hotkey_driver_mask;          /* events needed by the driver */
2071 static u32 hotkey_user_mask;            /* events visible to userspace */
2072 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2073
2074 static unsigned int hotkey_report_mode;
2075
2076 static u16 *hotkey_keycode_map;
2077
2078 static struct attribute_set *hotkey_dev_attributes;
2079
2080 static void tpacpi_driver_event(const unsigned int hkey_event);
2081 static void hotkey_driver_event(const unsigned int scancode);
2082
2083 /* HKEY.MHKG() return bits */
2084 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2085
2086 static int hotkey_get_wlsw(void)
2087 {
2088         int status;
2089
2090         if (!tp_features.hotkey_wlsw)
2091                 return -ENODEV;
2092
2093 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2094         if (dbg_wlswemul)
2095                 return (tpacpi_wlsw_emulstate) ?
2096                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2097 #endif
2098
2099         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2100                 return -EIO;
2101
2102         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2103 }
2104
2105 static int hotkey_get_tablet_mode(int *status)
2106 {
2107         int s;
2108
2109         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2110                 return -EIO;
2111
2112         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2113         return 0;
2114 }
2115
2116 /*
2117  * Reads current event mask from firmware, and updates
2118  * hotkey_acpi_mask accordingly.  Also resets any bits
2119  * from hotkey_user_mask that are unavailable to be
2120  * delivered (shadow requirement of the userspace ABI).
2121  *
2122  * Call with hotkey_mutex held
2123  */
2124 static int hotkey_mask_get(void)
2125 {
2126         if (tp_features.hotkey_mask) {
2127                 u32 m = 0;
2128
2129                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2130                         return -EIO;
2131
2132                 hotkey_acpi_mask = m;
2133         } else {
2134                 /* no mask support doesn't mean no event support... */
2135                 hotkey_acpi_mask = hotkey_all_mask;
2136         }
2137
2138         /* sync userspace-visible mask */
2139         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2140
2141         return 0;
2142 }
2143
2144 void static hotkey_mask_warn_incomplete_mask(void)
2145 {
2146         /* log only what the user can fix... */
2147         const u32 wantedmask = hotkey_driver_mask &
2148                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2149                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2150
2151         if (wantedmask)
2152                 printk(TPACPI_NOTICE
2153                         "required events 0x%08x not enabled!\n",
2154                         wantedmask);
2155 }
2156
2157 /*
2158  * Set the firmware mask when supported
2159  *
2160  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2161  *
2162  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2163  *
2164  * Call with hotkey_mutex held
2165  */
2166 static int hotkey_mask_set(u32 mask)
2167 {
2168         int i;
2169         int rc = 0;
2170
2171         const u32 fwmask = mask & ~hotkey_source_mask;
2172
2173         if (tp_features.hotkey_mask) {
2174                 for (i = 0; i < 32; i++) {
2175                         if (!acpi_evalf(hkey_handle,
2176                                         NULL, "MHKM", "vdd", i + 1,
2177                                         !!(mask & (1 << i)))) {
2178                                 rc = -EIO;
2179                                 break;
2180                         }
2181                 }
2182         }
2183
2184         /*
2185          * We *must* make an inconditional call to hotkey_mask_get to
2186          * refresh hotkey_acpi_mask and update hotkey_user_mask
2187          *
2188          * Take the opportunity to also log when we cannot _enable_
2189          * a given event.
2190          */
2191         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2192                 printk(TPACPI_NOTICE
2193                        "asked for hotkey mask 0x%08x, but "
2194                        "firmware forced it to 0x%08x\n",
2195                        fwmask, hotkey_acpi_mask);
2196         }
2197
2198         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2199                 hotkey_mask_warn_incomplete_mask();
2200
2201         return rc;
2202 }
2203
2204 /*
2205  * Sets hotkey_user_mask and tries to set the firmware mask
2206  *
2207  * Call with hotkey_mutex held
2208  */
2209 static int hotkey_user_mask_set(const u32 mask)
2210 {
2211         int rc;
2212
2213         /* Give people a chance to notice they are doing something that
2214          * is bound to go boom on their users sooner or later */
2215         if (!tp_warned.hotkey_mask_ff &&
2216             (mask == 0xffff || mask == 0xffffff ||
2217              mask == 0xffffffff)) {
2218                 tp_warned.hotkey_mask_ff = 1;
2219                 printk(TPACPI_NOTICE
2220                        "setting the hotkey mask to 0x%08x is likely "
2221                        "not the best way to go about it\n", mask);
2222                 printk(TPACPI_NOTICE
2223                        "please consider using the driver defaults, "
2224                        "and refer to up-to-date thinkpad-acpi "
2225                        "documentation\n");
2226         }
2227
2228         /* Try to enable what the user asked for, plus whatever we need.
2229          * this syncs everything but won't enable bits in hotkey_user_mask */
2230         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2231
2232         /* Enable the available bits in hotkey_user_mask */
2233         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2234
2235         return rc;
2236 }
2237
2238 /*
2239  * Sets the driver hotkey mask.
2240  *
2241  * Can be called even if the hotkey subdriver is inactive
2242  */
2243 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2244 {
2245         int rc;
2246
2247         /* Do the right thing if hotkey_init has not been called yet */
2248         if (!tp_features.hotkey) {
2249                 hotkey_driver_mask = mask;
2250                 return 0;
2251         }
2252
2253         mutex_lock(&hotkey_mutex);
2254
2255         HOTKEY_CONFIG_CRITICAL_START
2256         hotkey_driver_mask = mask;
2257 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2258         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2259 #endif
2260         HOTKEY_CONFIG_CRITICAL_END
2261
2262         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2263                                                         ~hotkey_source_mask);
2264         mutex_unlock(&hotkey_mutex);
2265
2266         return rc;
2267 }
2268
2269 static int hotkey_status_get(int *status)
2270 {
2271         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2272                 return -EIO;
2273
2274         return 0;
2275 }
2276
2277 static int hotkey_status_set(bool enable)
2278 {
2279         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2280                 return -EIO;
2281
2282         return 0;
2283 }
2284
2285 static void tpacpi_input_send_tabletsw(void)
2286 {
2287         int state;
2288
2289         if (tp_features.hotkey_tablet &&
2290             !hotkey_get_tablet_mode(&state)) {
2291                 mutex_lock(&tpacpi_inputdev_send_mutex);
2292
2293                 input_report_switch(tpacpi_inputdev,
2294                                     SW_TABLET_MODE, !!state);
2295                 input_sync(tpacpi_inputdev);
2296
2297                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2298         }
2299 }
2300
2301 /* Do NOT call without validating scancode first */
2302 static void tpacpi_input_send_key(const unsigned int scancode)
2303 {
2304         const unsigned int keycode = hotkey_keycode_map[scancode];
2305
2306         if (keycode != KEY_RESERVED) {
2307                 mutex_lock(&tpacpi_inputdev_send_mutex);
2308
2309                 input_report_key(tpacpi_inputdev, keycode, 1);
2310                 if (keycode == KEY_UNKNOWN)
2311                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2312                                     scancode);
2313                 input_sync(tpacpi_inputdev);
2314
2315                 input_report_key(tpacpi_inputdev, keycode, 0);
2316                 if (keycode == KEY_UNKNOWN)
2317                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2318                                     scancode);
2319                 input_sync(tpacpi_inputdev);
2320
2321                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2322         }
2323 }
2324
2325 /* Do NOT call without validating scancode first */
2326 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2327 {
2328         hotkey_driver_event(scancode);
2329         if (hotkey_user_mask & (1 << scancode))
2330                 tpacpi_input_send_key(scancode);
2331 }
2332
2333 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2334 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2335
2336 /* Do NOT call without validating scancode first */
2337 static void tpacpi_hotkey_send_key(unsigned int scancode)
2338 {
2339         tpacpi_input_send_key_masked(scancode);
2340         if (hotkey_report_mode < 2) {
2341                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2342                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2343         }
2344 }
2345
2346 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2347 {
2348         u8 d;
2349
2350         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2351                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2352                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2353                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2354                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2355                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2356         }
2357         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2358                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2359                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2360         }
2361         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2362                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2363                 n->displayexp_toggle =
2364                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2365         }
2366         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2367                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2368                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2369                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2370                 n->brightness_toggle =
2371                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2372         }
2373         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2374                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2375                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2376                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2377                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2378                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2379         }
2380 }
2381
2382 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2383                                            struct tp_nvram_state *newn,
2384                                            const u32 event_mask)
2385 {
2386
2387 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2388         do { \
2389                 if ((event_mask & (1 << __scancode)) && \
2390                     oldn->__member != newn->__member) \
2391                         tpacpi_hotkey_send_key(__scancode); \
2392         } while (0)
2393
2394 #define TPACPI_MAY_SEND_KEY(__scancode) \
2395         do { \
2396                 if (event_mask & (1 << __scancode)) \
2397                         tpacpi_hotkey_send_key(__scancode); \
2398         } while (0)
2399
2400         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2401         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2402         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2403         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2404
2405         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2406
2407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2408
2409         /* handle volume */
2410         if (oldn->volume_toggle != newn->volume_toggle) {
2411                 if (oldn->mute != newn->mute) {
2412                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2413                 }
2414                 if (oldn->volume_level > newn->volume_level) {
2415                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2416                 } else if (oldn->volume_level < newn->volume_level) {
2417                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2418                 } else if (oldn->mute == newn->mute) {
2419                         /* repeated key presses that didn't change state */
2420                         if (newn->mute) {
2421                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2422                         } else if (newn->volume_level != 0) {
2423                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2424                         } else {
2425                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2426                         }
2427                 }
2428         }
2429
2430         /* handle brightness */
2431         if (oldn->brightness_toggle != newn->brightness_toggle) {
2432                 if (oldn->brightness_level < newn->brightness_level) {
2433                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2434                 } else if (oldn->brightness_level > newn->brightness_level) {
2435                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2436                 } else {
2437                         /* repeated key presses that didn't change state */
2438                         if (newn->brightness_level != 0) {
2439                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440                         } else {
2441                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2442                         }
2443                 }
2444         }
2445
2446 #undef TPACPI_COMPARE_KEY
2447 #undef TPACPI_MAY_SEND_KEY
2448 }
2449
2450 /*
2451  * Polling driver
2452  *
2453  * We track all events in hotkey_source_mask all the time, since
2454  * most of them are edge-based.  We only issue those requested by
2455  * hotkey_user_mask or hotkey_driver_mask, though.
2456  */
2457 static int hotkey_kthread(void *data)
2458 {
2459         struct tp_nvram_state s[2];
2460         u32 poll_mask, event_mask;
2461         unsigned int si, so;
2462         unsigned long t;
2463         unsigned int change_detector, must_reset;
2464         unsigned int poll_freq;
2465
2466         mutex_lock(&hotkey_thread_mutex);
2467
2468         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2469                 goto exit;
2470
2471         set_freezable();
2472
2473         so = 0;
2474         si = 1;
2475         t = 0;
2476
2477         /* Initial state for compares */
2478         mutex_lock(&hotkey_thread_data_mutex);
2479         change_detector = hotkey_config_change;
2480         poll_mask = hotkey_source_mask;
2481         event_mask = hotkey_source_mask &
2482                         (hotkey_driver_mask | hotkey_user_mask);
2483         poll_freq = hotkey_poll_freq;
2484         mutex_unlock(&hotkey_thread_data_mutex);
2485         hotkey_read_nvram(&s[so], poll_mask);
2486
2487         while (!kthread_should_stop()) {
2488                 if (t == 0) {
2489                         if (likely(poll_freq))
2490                                 t = 1000/poll_freq;
2491                         else
2492                                 t = 100;        /* should never happen... */
2493                 }
2494                 t = msleep_interruptible(t);
2495                 if (unlikely(kthread_should_stop()))
2496                         break;
2497                 must_reset = try_to_freeze();
2498                 if (t > 0 && !must_reset)
2499                         continue;
2500
2501                 mutex_lock(&hotkey_thread_data_mutex);
2502                 if (must_reset || hotkey_config_change != change_detector) {
2503                         /* forget old state on thaw or config change */
2504                         si = so;
2505                         t = 0;
2506                         change_detector = hotkey_config_change;
2507                 }
2508                 poll_mask = hotkey_source_mask;
2509                 event_mask = hotkey_source_mask &
2510                                 (hotkey_driver_mask | hotkey_user_mask);
2511                 poll_freq = hotkey_poll_freq;
2512                 mutex_unlock(&hotkey_thread_data_mutex);
2513
2514                 if (likely(poll_mask)) {
2515                         hotkey_read_nvram(&s[si], poll_mask);
2516                         if (likely(si != so)) {
2517                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2518                                                                 event_mask);
2519                         }
2520                 }
2521
2522                 so = si;
2523                 si ^= 1;
2524         }
2525
2526 exit:
2527         mutex_unlock(&hotkey_thread_mutex);
2528         return 0;
2529 }
2530
2531 /* call with hotkey_mutex held */
2532 static void hotkey_poll_stop_sync(void)
2533 {
2534         if (tpacpi_hotkey_task) {
2535                 if (frozen(tpacpi_hotkey_task) ||
2536                     freezing(tpacpi_hotkey_task))
2537                         thaw_process(tpacpi_hotkey_task);
2538
2539                 kthread_stop(tpacpi_hotkey_task);
2540                 tpacpi_hotkey_task = NULL;
2541                 mutex_lock(&hotkey_thread_mutex);
2542                 /* at this point, the thread did exit */
2543                 mutex_unlock(&hotkey_thread_mutex);
2544         }
2545 }
2546
2547 /* call with hotkey_mutex held */
2548 static void hotkey_poll_setup(bool may_warn)
2549 {
2550         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2551         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2552
2553         if (hotkey_poll_freq > 0 &&
2554             (poll_driver_mask ||
2555              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2556                 if (!tpacpi_hotkey_task) {
2557                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2558                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2559                         if (IS_ERR(tpacpi_hotkey_task)) {
2560                                 tpacpi_hotkey_task = NULL;
2561                                 printk(TPACPI_ERR
2562                                        "could not create kernel thread "
2563                                        "for hotkey polling\n");
2564                         }
2565                 }
2566         } else {
2567                 hotkey_poll_stop_sync();
2568                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2569                     hotkey_poll_freq == 0) {
2570                         printk(TPACPI_NOTICE
2571                                 "hot keys 0x%08x and/or events 0x%08x "
2572                                 "require polling, which is currently "
2573                                 "disabled\n",
2574                                 poll_user_mask, poll_driver_mask);
2575                 }
2576         }
2577 }
2578
2579 static void hotkey_poll_setup_safe(bool may_warn)
2580 {
2581         mutex_lock(&hotkey_mutex);
2582         hotkey_poll_setup(may_warn);
2583         mutex_unlock(&hotkey_mutex);
2584 }
2585
2586 /* call with hotkey_mutex held */
2587 static void hotkey_poll_set_freq(unsigned int freq)
2588 {
2589         if (!freq)
2590                 hotkey_poll_stop_sync();
2591
2592         hotkey_poll_freq = freq;
2593 }
2594
2595 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2596
2597 static void hotkey_poll_setup_safe(bool __unused)
2598 {
2599 }
2600
2601 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2602
2603 static int hotkey_inputdev_open(struct input_dev *dev)
2604 {
2605         switch (tpacpi_lifecycle) {
2606         case TPACPI_LIFE_INIT:
2607                 /*
2608                  * hotkey_init will call hotkey_poll_setup_safe
2609                  * at the appropriate moment
2610                  */
2611                 return 0;
2612         case TPACPI_LIFE_EXITING:
2613                 return -EBUSY;
2614         case TPACPI_LIFE_RUNNING:
2615                 hotkey_poll_setup_safe(false);
2616                 return 0;
2617         }
2618
2619         /* Should only happen if tpacpi_lifecycle is corrupt */
2620         BUG();
2621         return -EBUSY;
2622 }
2623
2624 static void hotkey_inputdev_close(struct input_dev *dev)
2625 {
2626         /* disable hotkey polling when possible */
2627         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2628             !(hotkey_source_mask & hotkey_driver_mask))
2629                 hotkey_poll_setup_safe(false);
2630 }
2631
2632 /* sysfs hotkey enable ------------------------------------------------- */
2633 static ssize_t hotkey_enable_show(struct device *dev,
2634                            struct device_attribute *attr,
2635                            char *buf)
2636 {
2637         int res, status;
2638
2639         printk_deprecated_attribute("hotkey_enable",
2640                         "Hotkey reporting is always enabled");
2641
2642         res = hotkey_status_get(&status);
2643         if (res)
2644                 return res;
2645
2646         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2647 }
2648
2649 static ssize_t hotkey_enable_store(struct device *dev,
2650                             struct device_attribute *attr,
2651                             const char *buf, size_t count)
2652 {
2653         unsigned long t;
2654
2655         printk_deprecated_attribute("hotkey_enable",
2656                         "Hotkeys can be disabled through hotkey_mask");
2657
2658         if (parse_strtoul(buf, 1, &t))
2659                 return -EINVAL;
2660
2661         if (t == 0)
2662                 return -EPERM;
2663
2664         return count;
2665 }
2666
2667 static struct device_attribute dev_attr_hotkey_enable =
2668         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2669                 hotkey_enable_show, hotkey_enable_store);
2670
2671 /* sysfs hotkey mask --------------------------------------------------- */
2672 static ssize_t hotkey_mask_show(struct device *dev,
2673                            struct device_attribute *attr,
2674                            char *buf)
2675 {
2676         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2677 }
2678
2679 static ssize_t hotkey_mask_store(struct device *dev,
2680                             struct device_attribute *attr,
2681                             const char *buf, size_t count)
2682 {
2683         unsigned long t;
2684         int res;
2685
2686         if (parse_strtoul(buf, 0xffffffffUL, &t))
2687                 return -EINVAL;
2688
2689         if (mutex_lock_killable(&hotkey_mutex))
2690                 return -ERESTARTSYS;
2691
2692         res = hotkey_user_mask_set(t);
2693
2694 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2695         hotkey_poll_setup(true);
2696 #endif
2697
2698         mutex_unlock(&hotkey_mutex);
2699
2700         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2701
2702         return (res) ? res : count;
2703 }
2704
2705 static struct device_attribute dev_attr_hotkey_mask =
2706         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2707                 hotkey_mask_show, hotkey_mask_store);
2708
2709 /* sysfs hotkey bios_enabled ------------------------------------------- */
2710 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2711                            struct device_attribute *attr,
2712                            char *buf)
2713 {
2714         return sprintf(buf, "0\n");
2715 }
2716
2717 static struct device_attribute dev_attr_hotkey_bios_enabled =
2718         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2719
2720 /* sysfs hotkey bios_mask ---------------------------------------------- */
2721 static ssize_t hotkey_bios_mask_show(struct device *dev,
2722                            struct device_attribute *attr,
2723                            char *buf)
2724 {
2725         printk_deprecated_attribute("hotkey_bios_mask",
2726                         "This attribute is useless.");
2727         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2728 }
2729
2730 static struct device_attribute dev_attr_hotkey_bios_mask =
2731         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2732
2733 /* sysfs hotkey all_mask ----------------------------------------------- */
2734 static ssize_t hotkey_all_mask_show(struct device *dev,
2735                            struct device_attribute *attr,
2736                            char *buf)
2737 {
2738         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2739                                 hotkey_all_mask | hotkey_source_mask);
2740 }
2741
2742 static struct device_attribute dev_attr_hotkey_all_mask =
2743         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2744
2745 /* sysfs hotkey recommended_mask --------------------------------------- */
2746 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2747                                             struct device_attribute *attr,
2748                                             char *buf)
2749 {
2750         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2751                         (hotkey_all_mask | hotkey_source_mask)
2752                         & ~hotkey_reserved_mask);
2753 }
2754
2755 static struct device_attribute dev_attr_hotkey_recommended_mask =
2756         __ATTR(hotkey_recommended_mask, S_IRUGO,
2757                 hotkey_recommended_mask_show, NULL);
2758
2759 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2760
2761 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2762 static ssize_t hotkey_source_mask_show(struct device *dev,
2763                            struct device_attribute *attr,
2764                            char *buf)
2765 {
2766         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2767 }
2768
2769 static ssize_t hotkey_source_mask_store(struct device *dev,
2770                             struct device_attribute *attr,
2771                             const char *buf, size_t count)
2772 {
2773         unsigned long t;
2774         u32 r_ev;
2775         int rc;
2776
2777         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2778                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2779                 return -EINVAL;
2780
2781         if (mutex_lock_killable(&hotkey_mutex))
2782                 return -ERESTARTSYS;
2783
2784         HOTKEY_CONFIG_CRITICAL_START
2785         hotkey_source_mask = t;
2786         HOTKEY_CONFIG_CRITICAL_END
2787
2788         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2789                         ~hotkey_source_mask);
2790         hotkey_poll_setup(true);
2791
2792         /* check if events needed by the driver got disabled */
2793         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2794                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2795
2796         mutex_unlock(&hotkey_mutex);
2797
2798         if (rc < 0)
2799                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2800                         "firmware event mask!\n");
2801
2802         if (r_ev)
2803                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2804                         "some important events were disabled: "
2805                         "0x%04x\n", r_ev);
2806
2807         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2808
2809         return (rc < 0) ? rc : count;
2810 }
2811
2812 static struct device_attribute dev_attr_hotkey_source_mask =
2813         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2814                 hotkey_source_mask_show, hotkey_source_mask_store);
2815
2816 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2817 static ssize_t hotkey_poll_freq_show(struct device *dev,
2818                            struct device_attribute *attr,
2819                            char *buf)
2820 {
2821         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2822 }
2823
2824 static ssize_t hotkey_poll_freq_store(struct device *dev,
2825                             struct device_attribute *attr,
2826                             const char *buf, size_t count)
2827 {
2828         unsigned long t;
2829
2830         if (parse_strtoul(buf, 25, &t))
2831                 return -EINVAL;
2832
2833         if (mutex_lock_killable(&hotkey_mutex))
2834                 return -ERESTARTSYS;
2835
2836         hotkey_poll_set_freq(t);
2837         hotkey_poll_setup(true);
2838
2839         mutex_unlock(&hotkey_mutex);
2840
2841         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2842
2843         return count;
2844 }
2845
2846 static struct device_attribute dev_attr_hotkey_poll_freq =
2847         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2848                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2849
2850 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2851
2852 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2853 static ssize_t hotkey_radio_sw_show(struct device *dev,
2854                            struct device_attribute *attr,
2855                            char *buf)
2856 {
2857         int res;
2858         res = hotkey_get_wlsw();
2859         if (res < 0)
2860                 return res;
2861
2862         /* Opportunistic update */
2863         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2864
2865         return snprintf(buf, PAGE_SIZE, "%d\n",
2866                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2867 }
2868
2869 static struct device_attribute dev_attr_hotkey_radio_sw =
2870         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2871
2872 static void hotkey_radio_sw_notify_change(void)
2873 {
2874         if (tp_features.hotkey_wlsw)
2875                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2876                              "hotkey_radio_sw");
2877 }
2878
2879 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2880 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2881                            struct device_attribute *attr,
2882                            char *buf)
2883 {
2884         int res, s;
2885         res = hotkey_get_tablet_mode(&s);
2886         if (res < 0)
2887                 return res;
2888
2889         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2890 }
2891
2892 static struct device_attribute dev_attr_hotkey_tablet_mode =
2893         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2894
2895 static void hotkey_tablet_mode_notify_change(void)
2896 {
2897         if (tp_features.hotkey_tablet)
2898                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2899                              "hotkey_tablet_mode");
2900 }
2901
2902 /* sysfs hotkey report_mode -------------------------------------------- */
2903 static ssize_t hotkey_report_mode_show(struct device *dev,
2904                            struct device_attribute *attr,
2905                            char *buf)
2906 {
2907         return snprintf(buf, PAGE_SIZE, "%d\n",
2908                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2909 }
2910
2911 static struct device_attribute dev_attr_hotkey_report_mode =
2912         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2913
2914 /* sysfs wakeup reason (pollable) -------------------------------------- */
2915 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2916                            struct device_attribute *attr,
2917                            char *buf)
2918 {
2919         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2920 }
2921
2922 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2923         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2924
2925 static void hotkey_wakeup_reason_notify_change(void)
2926 {
2927         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2928                      "wakeup_reason");
2929 }
2930
2931 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2932 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2933                            struct device_attribute *attr,
2934                            char *buf)
2935 {
2936         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2937 }
2938
2939 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2940         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2941                hotkey_wakeup_hotunplug_complete_show, NULL);
2942
2943 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2944 {
2945         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2946                      "wakeup_hotunplug_complete");
2947 }
2948
2949 /* --------------------------------------------------------------------- */
2950
2951 static struct attribute *hotkey_attributes[] __initdata = {
2952         &dev_attr_hotkey_enable.attr,
2953         &dev_attr_hotkey_bios_enabled.attr,
2954         &dev_attr_hotkey_bios_mask.attr,
2955         &dev_attr_hotkey_report_mode.attr,
2956         &dev_attr_hotkey_wakeup_reason.attr,
2957         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2958         &dev_attr_hotkey_mask.attr,
2959         &dev_attr_hotkey_all_mask.attr,
2960         &dev_attr_hotkey_recommended_mask.attr,
2961 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2962         &dev_attr_hotkey_source_mask.attr,
2963         &dev_attr_hotkey_poll_freq.attr,
2964 #endif
2965 };
2966
2967 /*
2968  * Sync both the hw and sw blocking state of all switches
2969  */
2970 static void tpacpi_send_radiosw_update(void)
2971 {
2972         int wlsw;
2973
2974         /*
2975          * We must sync all rfkill controllers *before* issuing any
2976          * rfkill input events, or we will race the rfkill core input
2977          * handler.
2978          *
2979          * tpacpi_inputdev_send_mutex works as a syncronization point
2980          * for the above.
2981          *
2982          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2983          */
2984
2985         wlsw = hotkey_get_wlsw();
2986
2987         /* Sync hw blocking state first if it is hw-blocked */
2988         if (wlsw == TPACPI_RFK_RADIO_OFF)
2989                 tpacpi_rfk_update_hwblock_state(true);
2990
2991         /* Sync sw blocking state */
2992         tpacpi_rfk_update_swstate_all();
2993
2994         /* Sync hw blocking state last if it is hw-unblocked */
2995         if (wlsw == TPACPI_RFK_RADIO_ON)
2996                 tpacpi_rfk_update_hwblock_state(false);
2997
2998         /* Issue rfkill input event for WLSW switch */
2999         if (!(wlsw < 0)) {
3000                 mutex_lock(&tpacpi_inputdev_send_mutex);
3001
3002                 input_report_switch(tpacpi_inputdev,
3003                                     SW_RFKILL_ALL, (wlsw > 0));
3004                 input_sync(tpacpi_inputdev);
3005
3006                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3007         }
3008
3009         /*
3010          * this can be unconditional, as we will poll state again
3011          * if userspace uses the notify to read data
3012          */
3013         hotkey_radio_sw_notify_change();
3014 }
3015
3016 static void hotkey_exit(void)
3017 {
3018 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3019         mutex_lock(&hotkey_mutex);
3020         hotkey_poll_stop_sync();
3021         mutex_unlock(&hotkey_mutex);
3022 #endif
3023
3024         if (hotkey_dev_attributes)
3025                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3026
3027         kfree(hotkey_keycode_map);
3028
3029         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3030                    "restoring original HKEY status and mask\n");
3031         /* yes, there is a bitwise or below, we want the
3032          * functions to be called even if one of them fail */
3033         if (((tp_features.hotkey_mask &&
3034               hotkey_mask_set(hotkey_orig_mask)) |
3035              hotkey_status_set(false)) != 0)
3036                 printk(TPACPI_ERR
3037                        "failed to restore hot key mask "
3038                        "to BIOS defaults\n");
3039 }
3040
3041 static void __init hotkey_unmap(const unsigned int scancode)
3042 {
3043         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3044                 clear_bit(hotkey_keycode_map[scancode],
3045                           tpacpi_inputdev->keybit);
3046                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3047         }
3048 }
3049
3050 /*
3051  * HKEY quirks:
3052  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3053  */
3054
3055 #define TPACPI_HK_Q_INIMASK     0x0001
3056
3057 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3058         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3059         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3060         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3061         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3062         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3063         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3064         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3065         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3066         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3067         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3068         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3069         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3070         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3071         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3072         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3073         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3074         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3075         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3076         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3077 };
3078
3079 static int __init hotkey_init(struct ibm_init_struct *iibm)
3080 {
3081         /* Requirements for changing the default keymaps:
3082          *
3083          * 1. Many of the keys are mapped to KEY_RESERVED for very
3084          *    good reasons.  Do not change them unless you have deep
3085          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3086          *    the various ThinkPad models.  The driver behaves
3087          *    differently for KEY_RESERVED: such keys have their
3088          *    hot key mask *unset* in mask_recommended, and also
3089          *    in the initial hot key mask programmed into the
3090          *    firmware at driver load time, which means the firm-
3091          *    ware may react very differently if you change them to
3092          *    something else;
3093          *
3094          * 2. You must be subscribed to the linux-thinkpad and
3095          *    ibm-acpi-devel mailing lists, and you should read the
3096          *    list archives since 2007 if you want to change the
3097          *    keymaps.  This requirement exists so that you will
3098          *    know the past history of problems with the thinkpad-
3099          *    acpi driver keymaps, and also that you will be
3100          *    listening to any bug reports;
3101          *
3102          * 3. Do not send thinkpad-acpi specific patches directly to
3103          *    for merging, *ever*.  Send them to the linux-acpi
3104          *    mailinglist for comments.  Merging is to be done only
3105          *    through acpi-test and the ACPI maintainer.
3106          *
3107          * If the above is too much to ask, don't change the keymap.
3108          * Ask the thinkpad-acpi maintainer to do it, instead.
3109          */
3110         static u16 ibm_keycode_map[] __initdata = {
3111                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3112                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3113                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3114                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3115
3116                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3117                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3118                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3119                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3120
3121                 /* brightness: firmware always reacts to them */
3122                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3123                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3124
3125                 /* Thinklight: firmware always react to it */
3126                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3127
3128                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3129                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3130
3131                 /* Volume: firmware always react to it and reprograms
3132                  * the built-in *extra* mixer.  Never map it to control
3133                  * another mixer by default. */
3134                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3135                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3136                 KEY_RESERVED,   /* 0x16: MUTE */
3137
3138                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3139
3140                 /* (assignments unknown, please report if found) */
3141                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3142                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3143         };
3144         static u16 lenovo_keycode_map[] __initdata = {
3145                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3146                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3147                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3148                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3149
3150                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3151                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3152                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3153                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3154
3155                 /* These should be enabled --only-- when ACPI video
3156                  * is disabled (i.e. in "vendor" mode), and are handled
3157                  * in a special way by the init code */
3158                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3159                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3160
3161                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3162
3163                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3164                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3165
3166                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3167                  * react to it and reprograms the built-in *extra* mixer.
3168                  * Never map it to control another mixer by default.
3169                  *
3170                  * T60?, T61, R60?, R61: firmware and EC tries to send
3171                  * these over the regular keyboard, so these are no-ops,
3172                  * but there are still weird bugs re. MUTE, so do not
3173                  * change unless you get test reports from all Lenovo
3174                  * models.  May cause the BIOS to interfere with the
3175                  * HDA mixer.
3176                  */
3177                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3178                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3179                 KEY_RESERVED,   /* 0x16: MUTE */
3180
3181                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3182
3183                 /* (assignments unknown, please report if found) */
3184                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3185                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3186         };
3187
3188 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3189 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3190 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3191
3192         int res, i;
3193         int status;
3194         int hkeyv;
3195         bool radiosw_state  = false;
3196         bool tabletsw_state = false;
3197
3198         unsigned long quirks;
3199
3200         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3201                         "initializing hotkey subdriver\n");
3202
3203         BUG_ON(!tpacpi_inputdev);
3204         BUG_ON(tpacpi_inputdev->open != NULL ||
3205                tpacpi_inputdev->close != NULL);
3206
3207         TPACPI_ACPIHANDLE_INIT(hkey);
3208         mutex_init(&hotkey_mutex);
3209
3210 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3211         mutex_init(&hotkey_thread_mutex);
3212         mutex_init(&hotkey_thread_data_mutex);
3213 #endif
3214
3215         /* hotkey not supported on 570 */
3216         tp_features.hotkey = hkey_handle != NULL;
3217
3218         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3219                 "hotkeys are %s\n",
3220                 str_supported(tp_features.hotkey));
3221
3222         if (!tp_features.hotkey)
3223                 return 1;
3224
3225         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3226                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3227
3228         tpacpi_disable_brightness_delay();
3229
3230         /* MUST have enough space for all attributes to be added to
3231          * hotkey_dev_attributes */
3232         hotkey_dev_attributes = create_attr_set(
3233                                         ARRAY_SIZE(hotkey_attributes) + 2,
3234                                         NULL);
3235         if (!hotkey_dev_attributes)
3236                 return -ENOMEM;
3237         res = add_many_to_attr_set(hotkey_dev_attributes,
3238                         hotkey_attributes,
3239                         ARRAY_SIZE(hotkey_attributes));
3240         if (res)
3241                 goto err_exit;
3242
3243         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3244            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3245            for HKEY interface version 0x100 */
3246         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3247                 if ((hkeyv >> 8) != 1) {
3248                         printk(TPACPI_ERR "unknown version of the "
3249                                "HKEY interface: 0x%x\n", hkeyv);
3250                         printk(TPACPI_ERR "please report this to %s\n",
3251                                TPACPI_MAIL);
3252                 } else {
3253                         /*
3254                          * MHKV 0x100 in A31, R40, R40e,
3255                          * T4x, X31, and later
3256                          */
3257                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3258                                 "firmware HKEY interface version: 0x%x\n",
3259                                 hkeyv);
3260
3261                         /* Paranoia check AND init hotkey_all_mask */
3262                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3263                                         "MHKA", "qd")) {
3264                                 printk(TPACPI_ERR
3265                                        "missing MHKA handler, "
3266                                        "please report this to %s\n",
3267                                        TPACPI_MAIL);
3268                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3269                                 hotkey_all_mask = 0x080cU;
3270                         } else {
3271                                 tp_features.hotkey_mask = 1;
3272                         }
3273                 }
3274         }
3275
3276         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3277                 "hotkey masks are %s\n",
3278                 str_supported(tp_features.hotkey_mask));
3279
3280         /* Init hotkey_all_mask if not initialized yet */
3281         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3282             (quirks & TPACPI_HK_Q_INIMASK))
3283                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3284
3285         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3286         if (tp_features.hotkey_mask) {
3287                 /* hotkey_source_mask *must* be zero for
3288                  * the first hotkey_mask_get to return hotkey_orig_mask */
3289                 res = hotkey_mask_get();
3290                 if (res)
3291                         goto err_exit;
3292
3293                 hotkey_orig_mask = hotkey_acpi_mask;
3294         } else {
3295                 hotkey_orig_mask = hotkey_all_mask;
3296                 hotkey_acpi_mask = hotkey_all_mask;
3297         }
3298
3299 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3300         if (dbg_wlswemul) {
3301                 tp_features.hotkey_wlsw = 1;
3302                 radiosw_state = !!tpacpi_wlsw_emulstate;
3303                 printk(TPACPI_INFO
3304                         "radio switch emulation enabled\n");
3305         } else
3306 #endif
3307         /* Not all thinkpads have a hardware radio switch */
3308         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3309                 tp_features.hotkey_wlsw = 1;
3310                 radiosw_state = !!status;
3311                 printk(TPACPI_INFO
3312                         "radio switch found; radios are %s\n",
3313                         enabled(status, 0));
3314         }
3315         if (tp_features.hotkey_wlsw)
3316                 res = add_to_attr_set(hotkey_dev_attributes,
3317                                 &dev_attr_hotkey_radio_sw.attr);
3318
3319         /* For X41t, X60t, X61t Tablets... */
3320         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3321                 tp_features.hotkey_tablet = 1;
3322                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3323                 printk(TPACPI_INFO
3324                         "possible tablet mode switch found; "
3325                         "ThinkPad in %s mode\n",
3326                         (tabletsw_state) ? "tablet" : "laptop");
3327                 res = add_to_attr_set(hotkey_dev_attributes,
3328                                 &dev_attr_hotkey_tablet_mode.attr);
3329         }
3330
3331         if (!res)
3332                 res = register_attr_set_with_sysfs(
3333                                 hotkey_dev_attributes,
3334                                 &tpacpi_pdev->dev.kobj);
3335         if (res)
3336                 goto err_exit;
3337
3338         /* Set up key map */
3339
3340         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3341                                         GFP_KERNEL);
3342         if (!hotkey_keycode_map) {
3343                 printk(TPACPI_ERR
3344                         "failed to allocate memory for key map\n");
3345                 res = -ENOMEM;
3346                 goto err_exit;
3347         }
3348
3349         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3350                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3351                            "using Lenovo default hot key map\n");
3352                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3353                         TPACPI_HOTKEY_MAP_SIZE);
3354         } else {
3355                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3356                            "using IBM default hot key map\n");
3357                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3358                         TPACPI_HOTKEY_MAP_SIZE);
3359         }
3360
3361         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3362         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3363         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3364         tpacpi_inputdev->keycode = hotkey_keycode_map;
3365         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3366                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3367                         input_set_capability(tpacpi_inputdev, EV_KEY,
3368                                                 hotkey_keycode_map[i]);
3369                 } else {
3370                         if (i < sizeof(hotkey_reserved_mask)*8)
3371                                 hotkey_reserved_mask |= 1 << i;
3372                 }
3373         }
3374
3375         if (tp_features.hotkey_wlsw) {
3376                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3377                 input_report_switch(tpacpi_inputdev,
3378                                     SW_RFKILL_ALL, radiosw_state);
3379         }
3380         if (tp_features.hotkey_tablet) {
3381                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3382                 input_report_switch(tpacpi_inputdev,
3383                                     SW_TABLET_MODE, tabletsw_state);
3384         }
3385
3386         /* Do not issue duplicate brightness change events to
3387          * userspace */
3388         if (!tp_features.bright_acpimode)
3389                 /* update bright_acpimode... */
3390                 tpacpi_check_std_acpi_brightness_support();
3391
3392         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3393                 printk(TPACPI_INFO
3394                        "This ThinkPad has standard ACPI backlight "
3395                        "brightness control, supported by the ACPI "
3396                        "video driver\n");
3397                 printk(TPACPI_NOTICE
3398                        "Disabling thinkpad-acpi brightness events "
3399                        "by default...\n");
3400
3401                 /* Disable brightness up/down on Lenovo thinkpads when
3402                  * ACPI is handling them, otherwise it is plain impossible
3403                  * for userspace to do something even remotely sane */
3404                 hotkey_reserved_mask |=
3405                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3406                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3407                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3408                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3409         }
3410
3411 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3412         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3413                                 & ~hotkey_all_mask
3414                                 & ~hotkey_reserved_mask;
3415
3416         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3417                     "hotkey source mask 0x%08x, polling freq %u\n",
3418                     hotkey_source_mask, hotkey_poll_freq);
3419 #endif
3420
3421         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3422                         "enabling firmware HKEY event interface...\n");
3423         res = hotkey_status_set(true);
3424         if (res) {
3425                 hotkey_exit();
3426                 return res;
3427         }
3428         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3429                                | hotkey_driver_mask)
3430                               & ~hotkey_source_mask);
3431         if (res < 0 && res != -ENXIO) {
3432                 hotkey_exit();
3433                 return res;
3434         }
3435         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3436                                 & ~hotkey_reserved_mask;
3437         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3438                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3439                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3440
3441         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3442                         "legacy ibm/hotkey event reporting over procfs %s\n",
3443                         (hotkey_report_mode < 2) ?
3444                                 "enabled" : "disabled");
3445
3446         tpacpi_inputdev->open = &hotkey_inputdev_open;
3447         tpacpi_inputdev->close = &hotkey_inputdev_close;
3448
3449         hotkey_poll_setup_safe(true);
3450
3451         return 0;
3452
3453 err_exit:
3454         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3455         hotkey_dev_attributes = NULL;
3456
3457         return (res < 0)? res : 1;
3458 }
3459
3460 static bool hotkey_notify_hotkey(const u32 hkey,
3461                                  bool *send_acpi_ev,
3462                                  bool *ignore_acpi_ev)
3463 {
3464         /* 0x1000-0x1FFF: key presses */
3465         unsigned int scancode = hkey & 0xfff;
3466         *send_acpi_ev = true;
3467         *ignore_acpi_ev = false;
3468
3469         if (scancode > 0 && scancode < 0x21) {
3470                 scancode--;
3471                 if (!(hotkey_source_mask & (1 << scancode))) {
3472                         tpacpi_input_send_key_masked(scancode);
3473                         *send_acpi_ev = false;
3474                 } else {
3475                         *ignore_acpi_ev = true;
3476                 }
3477                 return true;
3478         }
3479         return false;
3480 }
3481
3482 static bool hotkey_notify_wakeup(const u32 hkey,
3483                                  bool *send_acpi_ev,
3484                                  bool *ignore_acpi_ev)
3485 {
3486         /* 0x2000-0x2FFF: Wakeup reason */
3487         *send_acpi_ev = true;
3488         *ignore_acpi_ev = false;
3489
3490         switch (hkey) {
3491         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3492         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3493                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3494                 *ignore_acpi_ev = true;
3495                 break;
3496
3497         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3498         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3499                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3500                 *ignore_acpi_ev = true;
3501                 break;
3502
3503         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3504         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3505                 printk(TPACPI_ALERT
3506                         "EMERGENCY WAKEUP: battery almost empty\n");
3507                 /* how to auto-heal: */
3508                 /* 2313: woke up from S3, go to S4/S5 */
3509                 /* 2413: woke up from S4, go to S5 */
3510                 break;
3511
3512         default:
3513                 return false;
3514         }
3515
3516         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3517                 printk(TPACPI_INFO
3518                        "woke up due to a hot-unplug "
3519                        "request...\n");
3520                 hotkey_wakeup_reason_notify_change();
3521         }
3522         return true;
3523 }
3524
3525 static bool hotkey_notify_usrevent(const u32 hkey,
3526                                  bool *send_acpi_ev,
3527                                  bool *ignore_acpi_ev)
3528 {
3529         /* 0x5000-0x5FFF: human interface helpers */
3530         *send_acpi_ev = true;
3531         *ignore_acpi_ev = false;
3532
3533         switch (hkey) {
3534         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3535         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3536                 return true;
3537
3538         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3539         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3540                 tpacpi_input_send_tabletsw();
3541                 hotkey_tablet_mode_notify_change();
3542                 *send_acpi_ev = false;
3543                 return true;
3544
3545         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3546         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3547         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3548                 /* do not propagate these events */
3549                 *ignore_acpi_ev = true;
3550                 return true;
3551
3552         default:
3553                 return false;
3554         }
3555 }
3556
3557 static void thermal_dump_all_sensors(void);
3558
3559 static bool hotkey_notify_thermal(const u32 hkey,
3560                                  bool *send_acpi_ev,
3561                                  bool *ignore_acpi_ev)
3562 {
3563         bool known = true;
3564
3565         /* 0x6000-0x6FFF: thermal alarms */
3566         *send_acpi_ev = true;
3567         *ignore_acpi_ev = false;
3568
3569         switch (hkey) {
3570         case TP_HKEY_EV_THM_TABLE_CHANGED:
3571                 printk(TPACPI_INFO
3572                         "EC reports that Thermal Table has changed\n");
3573                 /* recommended action: do nothing, we don't have
3574                  * Lenovo ATM information */
3575                 return true;
3576         case TP_HKEY_EV_ALARM_BAT_HOT:
3577                 printk(TPACPI_CRIT
3578                         "THERMAL ALARM: battery is too hot!\n");
3579                 /* recommended action: warn user through gui */
3580                 break;
3581         case TP_HKEY_EV_ALARM_BAT_XHOT:
3582                 printk(TPACPI_ALERT
3583                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3584                 /* recommended action: immediate sleep/hibernate */
3585                 break;
3586         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3587                 printk(TPACPI_CRIT
3588                         "THERMAL ALARM: "
3589                         "a sensor reports something is too hot!\n");
3590                 /* recommended action: warn user through gui, that */
3591                 /* some internal component is too hot */
3592                 break;
3593         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3594                 printk(TPACPI_ALERT
3595                         "THERMAL EMERGENCY: "
3596                         "a sensor reports something is extremely hot!\n");
3597                 /* recommended action: immediate sleep/hibernate */
3598                 break;
3599         default:
3600                 printk(TPACPI_ALERT
3601                          "THERMAL ALERT: unknown thermal alarm received\n");
3602                 known = false;
3603         }
3604
3605         thermal_dump_all_sensors();
3606
3607         return known;
3608 }
3609
3610 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3611 {
3612         u32 hkey;
3613         bool send_acpi_ev;
3614         bool ignore_acpi_ev;
3615         bool known_ev;
3616
3617         if (event != 0x80) {
3618                 printk(TPACPI_ERR
3619                        "unknown HKEY notification event %d\n", event);
3620                 /* forward it to userspace, maybe it knows how to handle it */
3621                 acpi_bus_generate_netlink_event(
3622                                         ibm->acpi->device->pnp.device_class,
3623                                         dev_name(&ibm->acpi->device->dev),
3624                                         event, 0);
3625                 return;
3626         }
3627
3628         while (1) {
3629                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3630                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3631                         return;
3632                 }
3633
3634                 if (hkey == 0) {
3635                         /* queue empty */
3636                         return;
3637                 }
3638
3639                 send_acpi_ev = true;
3640                 ignore_acpi_ev = false;
3641
3642                 switch (hkey >> 12) {
3643                 case 1:
3644                         /* 0x1000-0x1FFF: key presses */
3645                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3646                                                  &ignore_acpi_ev);
3647                         break;
3648                 case 2:
3649                         /* 0x2000-0x2FFF: Wakeup reason */
3650                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3651                                                  &ignore_acpi_ev);
3652                         break;
3653                 case 3:
3654                         /* 0x3000-0x3FFF: bay-related wakeups */
3655                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3656                                 hotkey_autosleep_ack = 1;
3657                                 printk(TPACPI_INFO
3658                                        "bay ejected\n");
3659                                 hotkey_wakeup_hotunplug_complete_notify_change();
3660                                 known_ev = true;
3661                         } else {
3662                                 known_ev = false;
3663                         }
3664                         break;
3665                 case 4:
3666                         /* 0x4000-0x4FFF: dock-related wakeups */
3667                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3668                                 hotkey_autosleep_ack = 1;
3669                                 printk(TPACPI_INFO
3670                                        "undocked\n");
3671                                 hotkey_wakeup_hotunplug_complete_notify_change();
3672                                 known_ev = true;
3673                         } else {
3674                                 known_ev = false;
3675                         }
3676                         break;
3677                 case 5:
3678                         /* 0x5000-0x5FFF: human interface helpers */
3679                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3680                                                  &ignore_acpi_ev);
3681                         break;
3682                 case 6:
3683                         /* 0x6000-0x6FFF: thermal alarms */
3684                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3685                                                  &ignore_acpi_ev);
3686                         break;
3687                 case 7:
3688                         /* 0x7000-0x7FFF: misc */
3689                         if (tp_features.hotkey_wlsw &&
3690                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3691                                 tpacpi_send_radiosw_update();
3692                                 send_acpi_ev = 0;
3693                                 known_ev = true;
3694                                 break;
3695                         }
3696                         /* fallthrough to default */
3697                 default:
3698                         known_ev = false;
3699                 }
3700                 if (!known_ev) {
3701                         printk(TPACPI_NOTICE
3702                                "unhandled HKEY event 0x%04x\n", hkey);
3703                         printk(TPACPI_NOTICE
3704                                "please report the conditions when this "
3705                                "event happened to %s\n", TPACPI_MAIL);
3706                 }
3707
3708                 /* Legacy events */
3709                 if (!ignore_acpi_ev &&
3710                     (send_acpi_ev || hotkey_report_mode < 2)) {
3711                         acpi_bus_generate_proc_event(ibm->acpi->device,
3712                                                      event, hkey);
3713                 }
3714
3715                 /* netlink events */
3716                 if (!ignore_acpi_ev && send_acpi_ev) {
3717                         acpi_bus_generate_netlink_event(
3718                                         ibm->acpi->device->pnp.device_class,
3719                                         dev_name(&ibm->acpi->device->dev),
3720                                         event, hkey);
3721                 }
3722         }
3723 }
3724
3725 static void hotkey_suspend(pm_message_t state)
3726 {
3727         /* Do these on suspend, we get the events on early resume! */
3728         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3729         hotkey_autosleep_ack = 0;
3730 }
3731
3732 static void hotkey_resume(void)
3733 {
3734         tpacpi_disable_brightness_delay();
3735
3736         if (hotkey_status_set(true) < 0 ||
3737             hotkey_mask_set(hotkey_acpi_mask) < 0)
3738                 printk(TPACPI_ERR
3739                        "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(char *p)
3751 {
3752         int res, status;
3753         int len = 0;
3754
3755         if (!tp_features.hotkey) {
3756                 len += sprintf(p + len, "status:\t\tnot supported\n");
3757                 return len;
3758         }
3759
3760         if (mutex_lock_killable(&hotkey_mutex))
3761                 return -ERESTARTSYS;
3762         res = hotkey_status_get(&status);
3763         if (!res)
3764                 res = hotkey_mask_get();
3765         mutex_unlock(&hotkey_mutex);
3766         if (res)
3767                 return res;
3768
3769         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3770         if (hotkey_all_mask) {
3771                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3772                 len += sprintf(p + len,
3773                                "commands:\tenable, disable, reset, <mask>\n");
3774         } else {
3775                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3776                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3777         }
3778
3779         return len;
3780 }
3781
3782 static void hotkey_enabledisable_warn(bool enable)
3783 {
3784         tpacpi_log_usertask("procfs hotkey enable/disable");
3785         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3786                         TPACPI_WARN
3787                         "hotkey enable/disable functionality has been "
3788                         "removed from the driver.  Hotkeys are always "
3789                         "enabled\n"))
3790                 printk(TPACPI_ERR
3791                         "Please remove the hotkey=enable module "
3792                         "parameter, it is deprecated.  Hotkeys are always "
3793                         "enabled\n");
3794 }
3795
3796 static int hotkey_write(char *buf)
3797 {
3798         int res;
3799         u32 mask;
3800         char *cmd;
3801
3802         if (!tp_features.hotkey)
3803                 return -ENODEV;
3804
3805         if (mutex_lock_killable(&hotkey_mutex))
3806                 return -ERESTARTSYS;
3807
3808         mask = hotkey_user_mask;
3809
3810         res = 0;
3811         while ((cmd = next_cmd(&buf))) {
3812                 if (strlencmp(cmd, "enable") == 0) {
3813                         hotkey_enabledisable_warn(1);
3814                 } else if (strlencmp(cmd, "disable") == 0) {
3815                         hotkey_enabledisable_warn(0);
3816                         res = -EPERM;
3817                 } else if (strlencmp(cmd, "reset") == 0) {
3818                         mask = (hotkey_all_mask | hotkey_source_mask)
3819                                 & ~hotkey_reserved_mask;
3820                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3821                         /* mask set */
3822                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3823                         /* mask set */
3824                 } else {
3825                         res = -EINVAL;
3826                         goto errexit;
3827                 }
3828         }
3829
3830         if (!res) {
3831                 tpacpi_disclose_usertask("procfs hotkey",
3832                         "set mask to 0x%08x\n", mask);
3833                 res = hotkey_user_mask_set(mask);
3834         }
3835
3836 errexit:
3837         mutex_unlock(&hotkey_mutex);
3838         return res;
3839 }
3840
3841 static const struct acpi_device_id ibm_htk_device_ids[] = {
3842         {TPACPI_ACPI_HKEY_HID, 0},
3843         {"", 0},
3844 };
3845
3846 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3847         .hid = ibm_htk_device_ids,
3848         .notify = hotkey_notify,
3849         .handle = &hkey_handle,
3850         .type = ACPI_DEVICE_NOTIFY,
3851 };
3852
3853 static struct ibm_struct hotkey_driver_data = {
3854         .name = "hotkey",
3855         .read = hotkey_read,
3856         .write = hotkey_write,
3857         .exit = hotkey_exit,
3858         .resume = hotkey_resume,
3859         .suspend = hotkey_suspend,
3860         .acpi = &ibm_hotkey_acpidriver,
3861 };
3862
3863 /*************************************************************************
3864  * Bluetooth subdriver
3865  */
3866
3867 enum {
3868         /* ACPI GBDC/SBDC bits */
3869         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3870         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3871         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3872                                                    off / last state */
3873 };
3874
3875 enum {
3876         /* ACPI \BLTH commands */
3877         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3878         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3879         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3880         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3881         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3882 };
3883
3884 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3885
3886 static int bluetooth_get_status(void)
3887 {
3888         int status;
3889
3890 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3891         if (dbg_bluetoothemul)
3892                 return (tpacpi_bluetooth_emulstate) ?
3893                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3894 #endif
3895
3896         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3897                 return -EIO;
3898
3899         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3900                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3901 }
3902
3903 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3904 {
3905         int status;
3906
3907         vdbg_printk(TPACPI_DBG_RFKILL,
3908                 "will attempt to %s bluetooth\n",
3909                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3910
3911 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3912         if (dbg_bluetoothemul) {
3913                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3914                 return 0;
3915         }
3916 #endif
3917
3918         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3919         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3920         if (state == TPACPI_RFK_RADIO_ON)
3921                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3922
3923         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3924                 return -EIO;
3925
3926         return 0;
3927 }
3928
3929 /* sysfs bluetooth enable ---------------------------------------------- */
3930 static ssize_t bluetooth_enable_show(struct device *dev,
3931                            struct device_attribute *attr,
3932                            char *buf)
3933 {
3934         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3935                         attr, buf);
3936 }
3937
3938 static ssize_t bluetooth_enable_store(struct device *dev,
3939                             struct device_attribute *attr,
3940                             const char *buf, size_t count)
3941 {
3942         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3943                                 attr, buf, count);
3944 }
3945
3946 static struct device_attribute dev_attr_bluetooth_enable =
3947         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3948                 bluetooth_enable_show, bluetooth_enable_store);
3949
3950 /* --------------------------------------------------------------------- */
3951
3952 static struct attribute *bluetooth_attributes[] = {
3953         &dev_attr_bluetooth_enable.attr,
3954         NULL
3955 };
3956
3957 static const struct attribute_group bluetooth_attr_group = {
3958         .attrs = bluetooth_attributes,
3959 };
3960
3961 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3962         .get_status = bluetooth_get_status,
3963         .set_status = bluetooth_set_status,
3964 };
3965
3966 static void bluetooth_shutdown(void)
3967 {
3968         /* Order firmware to save current state to NVRAM */
3969         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3970                         TP_ACPI_BLTH_SAVE_STATE))
3971                 printk(TPACPI_NOTICE
3972                         "failed to save bluetooth state to NVRAM\n");
3973         else
3974                 vdbg_printk(TPACPI_DBG_RFKILL,
3975                         "bluestooth state saved to NVRAM\n");
3976 }
3977
3978 static void bluetooth_exit(void)
3979 {
3980         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3981                         &bluetooth_attr_group);
3982
3983         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3984
3985         bluetooth_shutdown();
3986 }
3987
3988 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3989 {
3990         int res;
3991         int status = 0;
3992
3993         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3994                         "initializing bluetooth subdriver\n");
3995
3996         TPACPI_ACPIHANDLE_INIT(hkey);
3997
3998         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3999            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4000         tp_features.bluetooth = hkey_handle &&
4001             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4002
4003         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4004                 "bluetooth is %s, status 0x%02x\n",
4005                 str_supported(tp_features.bluetooth),
4006                 status);
4007
4008 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4009         if (dbg_bluetoothemul) {
4010                 tp_features.bluetooth = 1;
4011                 printk(TPACPI_INFO
4012                         "bluetooth switch emulation enabled\n");
4013         } else
4014 #endif
4015         if (tp_features.bluetooth &&
4016             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4017                 /* no bluetooth hardware present in system */
4018                 tp_features.bluetooth = 0;
4019                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4020                            "bluetooth hardware not installed\n");
4021         }
4022
4023         if (!tp_features.bluetooth)
4024                 return 1;
4025
4026         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4027                                 &bluetooth_tprfk_ops,
4028                                 RFKILL_TYPE_BLUETOOTH,
4029                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4030                                 true);
4031         if (res)
4032                 return res;
4033
4034         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4035                                 &bluetooth_attr_group);
4036         if (res) {
4037                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4038                 return res;
4039         }
4040
4041         return 0;
4042 }
4043
4044 /* procfs -------------------------------------------------------------- */
4045 static int bluetooth_read(char *p)
4046 {
4047         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4048 }
4049
4050 static int bluetooth_write(char *buf)
4051 {
4052         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4053 }
4054
4055 static struct ibm_struct bluetooth_driver_data = {
4056         .name = "bluetooth",
4057         .read = bluetooth_read,
4058         .write = bluetooth_write,
4059         .exit = bluetooth_exit,
4060         .shutdown = bluetooth_shutdown,
4061 };
4062
4063 /*************************************************************************
4064  * Wan subdriver
4065  */
4066
4067 enum {
4068         /* ACPI GWAN/SWAN bits */
4069         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4070         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4071         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4072                                                    off / last state */
4073 };
4074
4075 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4076
4077 static int wan_get_status(void)
4078 {
4079         int status;
4080
4081 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4082         if (dbg_wwanemul)
4083                 return (tpacpi_wwan_emulstate) ?
4084                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4085 #endif
4086
4087         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4088                 return -EIO;
4089
4090         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4091                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4092 }
4093
4094 static int wan_set_status(enum tpacpi_rfkill_state state)
4095 {
4096         int status;
4097
4098         vdbg_printk(TPACPI_DBG_RFKILL,
4099                 "will attempt to %s wwan\n",
4100                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4101
4102 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4103         if (dbg_wwanemul) {
4104                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4105                 return 0;
4106         }
4107 #endif
4108
4109         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4110         status = TP_ACPI_WANCARD_RESUMECTRL;
4111         if (state == TPACPI_RFK_RADIO_ON)
4112                 status |= TP_ACPI_WANCARD_RADIOSSW;
4113
4114         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4115                 return -EIO;
4116
4117         return 0;
4118 }
4119
4120 /* sysfs wan enable ---------------------------------------------------- */
4121 static ssize_t wan_enable_show(struct device *dev,
4122                            struct device_attribute *attr,
4123                            char *buf)
4124 {
4125         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4126                         attr, buf);
4127 }
4128
4129 static ssize_t wan_enable_store(struct device *dev,
4130                             struct device_attribute *attr,
4131                             const char *buf, size_t count)
4132 {
4133         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4134                         attr, buf, count);
4135 }
4136
4137 static struct device_attribute dev_attr_wan_enable =
4138         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4139                 wan_enable_show, wan_enable_store);
4140
4141 /* --------------------------------------------------------------------- */
4142
4143 static struct attribute *wan_attributes[] = {
4144         &dev_attr_wan_enable.attr,
4145         NULL
4146 };
4147
4148 static const struct attribute_group wan_attr_group = {
4149         .attrs = wan_attributes,
4150 };
4151
4152 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4153         .get_status = wan_get_status,
4154         .set_status = wan_set_status,
4155 };
4156
4157 static void wan_shutdown(void)
4158 {
4159         /* Order firmware to save current state to NVRAM */
4160         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4161                         TP_ACPI_WGSV_SAVE_STATE))
4162                 printk(TPACPI_NOTICE
4163                         "failed to save WWAN state to NVRAM\n");
4164         else
4165                 vdbg_printk(TPACPI_DBG_RFKILL,
4166                         "WWAN state saved to NVRAM\n");
4167 }
4168
4169 static void wan_exit(void)
4170 {
4171         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4172                 &wan_attr_group);
4173
4174         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4175
4176         wan_shutdown();
4177 }
4178
4179 static int __init wan_init(struct ibm_init_struct *iibm)
4180 {
4181         int res;
4182         int status = 0;
4183
4184         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4185                         "initializing wan subdriver\n");
4186
4187         TPACPI_ACPIHANDLE_INIT(hkey);
4188
4189         tp_features.wan = hkey_handle &&
4190             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4191
4192         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4193                 "wan is %s, status 0x%02x\n",
4194                 str_supported(tp_features.wan),
4195                 status);
4196
4197 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4198         if (dbg_wwanemul) {
4199                 tp_features.wan = 1;
4200                 printk(TPACPI_INFO
4201                         "wwan switch emulation enabled\n");
4202         } else
4203 #endif
4204         if (tp_features.wan &&
4205             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4206                 /* no wan hardware present in system */
4207                 tp_features.wan = 0;
4208                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4209                            "wan hardware not installed\n");
4210         }
4211
4212         if (!tp_features.wan)
4213                 return 1;
4214
4215         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4216                                 &wan_tprfk_ops,
4217                                 RFKILL_TYPE_WWAN,
4218                                 TPACPI_RFK_WWAN_SW_NAME,
4219                                 true);
4220         if (res)
4221                 return res;
4222
4223         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4224                                 &wan_attr_group);
4225
4226         if (res) {
4227                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4228                 return res;
4229         }
4230
4231         return 0;
4232 }
4233
4234 /* procfs -------------------------------------------------------------- */
4235 static int wan_read(char *p)
4236 {
4237         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4238 }
4239
4240 static int wan_write(char *buf)
4241 {
4242         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4243 }
4244
4245 static struct ibm_struct wan_driver_data = {
4246         .name = "wan",
4247         .read = wan_read,
4248         .write = wan_write,
4249         .exit = wan_exit,
4250         .shutdown = wan_shutdown,
4251 };
4252
4253 /*************************************************************************
4254  * UWB subdriver
4255  */
4256
4257 enum {
4258         /* ACPI GUWB/SUWB bits */
4259         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4260         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4261 };
4262
4263 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4264
4265 static int uwb_get_status(void)
4266 {
4267         int status;
4268
4269 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4270         if (dbg_uwbemul)
4271                 return (tpacpi_uwb_emulstate) ?
4272                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4273 #endif
4274
4275         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4276                 return -EIO;
4277
4278         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4279                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4280 }
4281
4282 static int uwb_set_status(enum tpacpi_rfkill_state state)
4283 {
4284         int status;
4285
4286         vdbg_printk(TPACPI_DBG_RFKILL,
4287                 "will attempt to %s UWB\n",
4288                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4289
4290 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4291         if (dbg_uwbemul) {
4292                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4293                 return 0;
4294         }
4295 #endif
4296
4297         if (state == TPACPI_RFK_RADIO_ON)
4298                 status = TP_ACPI_UWB_RADIOSSW;
4299         else
4300                 status = 0;
4301
4302         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4303                 return -EIO;
4304
4305         return 0;
4306 }
4307
4308 /* --------------------------------------------------------------------- */
4309
4310 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4311         .get_status = uwb_get_status,
4312         .set_status = uwb_set_status,
4313 };
4314
4315 static void uwb_exit(void)
4316 {
4317         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4318 }
4319
4320 static int __init uwb_init(struct ibm_init_struct *iibm)
4321 {
4322         int res;
4323         int status = 0;
4324
4325         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4326                         "initializing uwb subdriver\n");
4327
4328         TPACPI_ACPIHANDLE_INIT(hkey);
4329
4330         tp_features.uwb = hkey_handle &&
4331             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4332
4333         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4334                 "uwb is %s, status 0x%02x\n",
4335                 str_supported(tp_features.uwb),
4336                 status);
4337
4338 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4339         if (dbg_uwbemul) {
4340                 tp_features.uwb = 1;
4341                 printk(TPACPI_INFO
4342                         "uwb switch emulation enabled\n");
4343         } else
4344 #endif
4345         if (tp_features.uwb &&
4346             !(status & TP_ACPI_UWB_HWPRESENT)) {
4347                 /* no uwb hardware present in system */
4348                 tp_features.uwb = 0;
4349                 dbg_printk(TPACPI_DBG_INIT,
4350                            "uwb hardware not installed\n");
4351         }
4352
4353         if (!tp_features.uwb)
4354                 return 1;
4355
4356         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4357                                 &uwb_tprfk_ops,
4358                                 RFKILL_TYPE_UWB,
4359                                 TPACPI_RFK_UWB_SW_NAME,
4360                                 false);
4361         return res;
4362 }
4363
4364 static struct ibm_struct uwb_driver_data = {
4365         .name = "uwb",
4366         .exit = uwb_exit,
4367         .flags.experimental = 1,
4368 };
4369
4370 /*************************************************************************
4371  * Video subdriver
4372  */
4373
4374 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4375
4376 enum video_access_mode {
4377         TPACPI_VIDEO_NONE = 0,
4378         TPACPI_VIDEO_570,       /* 570 */
4379         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4380         TPACPI_VIDEO_NEW,       /* all others */
4381 };
4382
4383 enum {  /* video status flags, based on VIDEO_570 */
4384         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4385         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4386         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4387 };
4388
4389 enum {  /* TPACPI_VIDEO_570 constants */
4390         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4391         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4392                                                  * video_status_flags */
4393         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4394         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4395 };
4396
4397 static enum video_access_mode video_supported;
4398 static int video_orig_autosw;
4399
4400 static int video_autosw_get(void);
4401 static int video_autosw_set(int enable);
4402
4403 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4404
4405 static int __init video_init(struct ibm_init_struct *iibm)
4406 {
4407         int ivga;
4408
4409         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4410
4411         TPACPI_ACPIHANDLE_INIT(vid);
4412         TPACPI_ACPIHANDLE_INIT(vid2);
4413
4414         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4415                 /* G41, assume IVGA doesn't change */
4416                 vid_handle = vid2_handle;
4417
4418         if (!vid_handle)
4419                 /* video switching not supported on R30, R31 */
4420                 video_supported = TPACPI_VIDEO_NONE;
4421         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4422                 /* 570 */
4423                 video_supported = TPACPI_VIDEO_570;
4424         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4425                 /* 600e/x, 770e, 770x */
4426                 video_supported = TPACPI_VIDEO_770;
4427         else
4428                 /* all others */
4429                 video_supported = TPACPI_VIDEO_NEW;
4430
4431         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4432                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4433                 video_supported);
4434
4435         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4436 }
4437
4438 static void video_exit(void)
4439 {
4440         dbg_printk(TPACPI_DBG_EXIT,
4441                    "restoring original video autoswitch mode\n");
4442         if (video_autosw_set(video_orig_autosw))
4443                 printk(TPACPI_ERR "error while trying to restore original "
4444                         "video autoswitch mode\n");
4445 }
4446
4447 static int video_outputsw_get(void)
4448 {
4449         int status = 0;
4450         int i;
4451
4452         switch (video_supported) {
4453         case TPACPI_VIDEO_570:
4454                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4455                                  TP_ACPI_VIDEO_570_PHSCMD))
4456                         return -EIO;
4457                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4458                 break;
4459         case TPACPI_VIDEO_770:
4460                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4461                         return -EIO;
4462                 if (i)
4463                         status |= TP_ACPI_VIDEO_S_LCD;
4464                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4465                         return -EIO;
4466                 if (i)
4467                         status |= TP_ACPI_VIDEO_S_CRT;
4468                 break;
4469         case TPACPI_VIDEO_NEW:
4470                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4471                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4472                         return -EIO;
4473                 if (i)
4474                         status |= TP_ACPI_VIDEO_S_CRT;
4475
4476                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4477                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4478                         return -EIO;
4479                 if (i)
4480                         status |= TP_ACPI_VIDEO_S_LCD;
4481                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4482                         return -EIO;
4483                 if (i)
4484                         status |= TP_ACPI_VIDEO_S_DVI;
4485                 break;
4486         default:
4487                 return -ENOSYS;
4488         }
4489
4490         return status;
4491 }
4492
4493 static int video_outputsw_set(int status)
4494 {
4495         int autosw;
4496         int res = 0;
4497
4498         switch (video_supported) {
4499         case TPACPI_VIDEO_570:
4500                 res = acpi_evalf(NULL, NULL,
4501                                  "\\_SB.PHS2", "vdd",
4502                                  TP_ACPI_VIDEO_570_PHS2CMD,
4503                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4504                 break;
4505         case TPACPI_VIDEO_770:
4506                 autosw = video_autosw_get();
4507                 if (autosw < 0)
4508                         return autosw;
4509
4510                 res = video_autosw_set(1);
4511                 if (res)
4512                         return res;
4513                 res = acpi_evalf(vid_handle, NULL,
4514                                  "ASWT", "vdd", status * 0x100, 0);
4515                 if (!autosw && video_autosw_set(autosw)) {
4516                         printk(TPACPI_ERR
4517                                "video auto-switch left enabled due to error\n");
4518                         return -EIO;
4519                 }
4520                 break;
4521         case TPACPI_VIDEO_NEW:
4522                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4523                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4524                 break;
4525         default:
4526                 return -ENOSYS;
4527         }
4528
4529         return (res)? 0 : -EIO;
4530 }
4531
4532 static int video_autosw_get(void)
4533 {
4534         int autosw = 0;
4535
4536         switch (video_supported) {
4537         case TPACPI_VIDEO_570:
4538                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4539                         return -EIO;
4540                 break;
4541         case TPACPI_VIDEO_770:
4542         case TPACPI_VIDEO_NEW:
4543                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4544                         return -EIO;
4545                 break;
4546         default:
4547                 return -ENOSYS;
4548         }
4549
4550         return autosw & 1;
4551 }
4552
4553 static int video_autosw_set(int enable)
4554 {
4555         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4556                 return -EIO;
4557         return 0;
4558 }
4559
4560 static int video_outputsw_cycle(void)
4561 {
4562         int autosw = video_autosw_get();
4563         int res;
4564
4565         if (autosw < 0)
4566                 return autosw;
4567
4568         switch (video_supported) {
4569         case TPACPI_VIDEO_570:
4570                 res = video_autosw_set(1);
4571                 if (res)
4572                         return res;
4573                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4574                 break;
4575         case TPACPI_VIDEO_770:
4576         case TPACPI_VIDEO_NEW:
4577                 res = video_autosw_set(1);
4578                 if (res)
4579                         return res;
4580                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4581                 break;
4582         default:
4583                 return -ENOSYS;
4584         }
4585         if (!autosw && video_autosw_set(autosw)) {
4586                 printk(TPACPI_ERR
4587                        "video auto-switch left enabled due to error\n");
4588                 return -EIO;
4589         }
4590
4591         return (res)? 0 : -EIO;
4592 }
4593
4594 static int video_expand_toggle(void)
4595 {
4596         switch (video_supported) {
4597         case TPACPI_VIDEO_570:
4598                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4599                         0 : -EIO;
4600         case TPACPI_VIDEO_770:
4601                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4602                         0 : -EIO;
4603         case TPACPI_VIDEO_NEW:
4604                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4605                         0 : -EIO;
4606         default:
4607                 return -ENOSYS;
4608         }
4609         /* not reached */
4610 }
4611
4612 static int video_read(char *p)
4613 {
4614         int status, autosw;
4615         int len = 0;
4616
4617         if (video_supported == TPACPI_VIDEO_NONE) {
4618                 len += sprintf(p + len, "status:\t\tnot supported\n");
4619                 return len;
4620         }
4621
4622         status = video_outputsw_get();
4623         if (status < 0)
4624                 return status;
4625
4626         autosw = video_autosw_get();
4627         if (autosw < 0)
4628                 return autosw;
4629
4630         len += sprintf(p + len, "status:\t\tsupported\n");
4631         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4632         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4633         if (video_supported == TPACPI_VIDEO_NEW)
4634                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4635         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4636         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4637         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4638         if (video_supported == TPACPI_VIDEO_NEW)
4639                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4640         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4641         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4642
4643         return len;
4644 }
4645
4646 static int video_write(char *buf)
4647 {
4648         char *cmd;
4649         int enable, disable, status;
4650         int res;
4651
4652         if (video_supported == TPACPI_VIDEO_NONE)
4653                 return -ENODEV;
4654
4655         enable = 0;
4656         disable = 0;
4657
4658         while ((cmd = next_cmd(&buf))) {
4659                 if (strlencmp(cmd, "lcd_enable") == 0) {
4660                         enable |= TP_ACPI_VIDEO_S_LCD;
4661                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4662                         disable |= TP_ACPI_VIDEO_S_LCD;
4663                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4664                         enable |= TP_ACPI_VIDEO_S_CRT;
4665                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4666                         disable |= TP_ACPI_VIDEO_S_CRT;
4667                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4668                            strlencmp(cmd, "dvi_enable") == 0) {
4669                         enable |= TP_ACPI_VIDEO_S_DVI;
4670                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671                            strlencmp(cmd, "dvi_disable") == 0) {
4672                         disable |= TP_ACPI_VIDEO_S_DVI;
4673                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4674                         res = video_autosw_set(1);
4675                         if (res)
4676                                 return res;
4677                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4678                         res = video_autosw_set(0);
4679                         if (res)
4680                                 return res;
4681                 } else if (strlencmp(cmd, "video_switch") == 0) {
4682                         res = video_outputsw_cycle();
4683                         if (res)
4684                                 return res;
4685                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4686                         res = video_expand_toggle();
4687                         if (res)
4688                                 return res;
4689                 } else
4690                         return -EINVAL;
4691         }
4692
4693         if (enable || disable) {
4694                 status = video_outputsw_get();
4695                 if (status < 0)
4696                         return status;
4697                 res = video_outputsw_set((status & ~disable) | enable);
4698                 if (res)
4699                         return res;
4700         }
4701
4702         return 0;
4703 }
4704
4705 static struct ibm_struct video_driver_data = {
4706         .name = "video",
4707         .read = video_read,
4708         .write = video_write,
4709         .exit = video_exit,
4710 };
4711
4712 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4713
4714 /*************************************************************************
4715  * Light (thinklight) subdriver
4716  */
4717
4718 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4719 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4720
4721 static int light_get_status(void)
4722 {
4723         int status = 0;
4724
4725         if (tp_features.light_status) {
4726                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4727                         return -EIO;
4728                 return (!!status);
4729         }
4730
4731         return -ENXIO;
4732 }
4733
4734 static int light_set_status(int status)
4735 {
4736         int rc;
4737
4738         if (tp_features.light) {
4739                 if (cmos_handle) {
4740                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4741                                         (status)?
4742                                                 TP_CMOS_THINKLIGHT_ON :
4743                                                 TP_CMOS_THINKLIGHT_OFF);
4744                 } else {
4745                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4746                                         (status)? 1 : 0);
4747                 }
4748                 return (rc)? 0 : -EIO;
4749         }
4750
4751         return -ENXIO;
4752 }
4753
4754 static void light_set_status_worker(struct work_struct *work)
4755 {
4756         struct tpacpi_led_classdev *data =
4757                         container_of(work, struct tpacpi_led_classdev, work);
4758
4759         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4760                 light_set_status((data->new_state != TPACPI_LED_OFF));
4761 }
4762
4763 static void light_sysfs_set(struct led_classdev *led_cdev,
4764                         enum led_brightness brightness)
4765 {
4766         struct tpacpi_led_classdev *data =
4767                 container_of(led_cdev,
4768                              struct tpacpi_led_classdev,
4769                              led_classdev);
4770         data->new_state = (brightness != LED_OFF) ?
4771                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4772         queue_work(tpacpi_wq, &data->work);
4773 }
4774
4775 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4776 {
4777         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4778 }
4779
4780 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4781         .led_classdev = {
4782                 .name           = "tpacpi::thinklight",
4783                 .brightness_set = &light_sysfs_set,
4784                 .brightness_get = &light_sysfs_get,
4785         }
4786 };
4787
4788 static int __init light_init(struct ibm_init_struct *iibm)
4789 {
4790         int rc;
4791
4792         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4793
4794         TPACPI_ACPIHANDLE_INIT(ledb);
4795         TPACPI_ACPIHANDLE_INIT(lght);
4796         TPACPI_ACPIHANDLE_INIT(cmos);
4797         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4798
4799         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4800         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4801
4802         if (tp_features.light)
4803                 /* light status not supported on
4804                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4805                 tp_features.light_status =
4806                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4807
4808         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4809                 str_supported(tp_features.light),
4810                 str_supported(tp_features.light_status));
4811
4812         if (!tp_features.light)
4813                 return 1;
4814
4815         rc = led_classdev_register(&tpacpi_pdev->dev,
4816                                    &tpacpi_led_thinklight.led_classdev);
4817
4818         if (rc < 0) {
4819                 tp_features.light = 0;
4820                 tp_features.light_status = 0;
4821         } else  {
4822                 rc = 0;
4823         }
4824
4825         return rc;
4826 }
4827
4828 static void light_exit(void)
4829 {
4830         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4831         if (work_pending(&tpacpi_led_thinklight.work))
4832                 flush_workqueue(tpacpi_wq);
4833 }
4834
4835 static int light_read(char *p)
4836 {
4837         int len = 0;
4838         int status;
4839
4840         if (!tp_features.light) {
4841                 len += sprintf(p + len, "status:\t\tnot supported\n");
4842         } else if (!tp_features.light_status) {
4843                 len += sprintf(p + len, "status:\t\tunknown\n");
4844                 len += sprintf(p + len, "commands:\ton, off\n");
4845         } else {
4846                 status = light_get_status();
4847                 if (status < 0)
4848                         return status;
4849                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4850                 len += sprintf(p + len, "commands:\ton, off\n");
4851         }
4852
4853         return len;
4854 }
4855
4856 static int light_write(char *buf)
4857 {
4858         char *cmd;
4859         int newstatus = 0;
4860
4861         if (!tp_features.light)
4862                 return -ENODEV;
4863
4864         while ((cmd = next_cmd(&buf))) {
4865                 if (strlencmp(cmd, "on") == 0) {
4866                         newstatus = 1;
4867                 } else if (strlencmp(cmd, "off") == 0) {
4868                         newstatus = 0;
4869                 } else
4870                         return -EINVAL;
4871         }
4872
4873         return light_set_status(newstatus);
4874 }
4875
4876 static struct ibm_struct light_driver_data = {
4877         .name = "light",
4878         .read = light_read,
4879         .write = light_write,
4880         .exit = light_exit,
4881 };
4882
4883 /*************************************************************************
4884  * CMOS subdriver
4885  */
4886
4887 /* sysfs cmos_command -------------------------------------------------- */
4888 static ssize_t cmos_command_store(struct device *dev,
4889                             struct device_attribute *attr,
4890                             const char *buf, size_t count)
4891 {
4892         unsigned long cmos_cmd;
4893         int res;
4894
4895         if (parse_strtoul(buf, 21, &cmos_cmd))
4896                 return -EINVAL;
4897
4898         res = issue_thinkpad_cmos_command(cmos_cmd);
4899         return (res)? res : count;
4900 }
4901
4902 static struct device_attribute dev_attr_cmos_command =
4903         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4904
4905 /* --------------------------------------------------------------------- */
4906
4907 static int __init cmos_init(struct ibm_init_struct *iibm)
4908 {
4909         int res;
4910
4911         vdbg_printk(TPACPI_DBG_INIT,
4912                 "initializing cmos commands subdriver\n");
4913
4914         TPACPI_ACPIHANDLE_INIT(cmos);
4915
4916         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4917                 str_supported(cmos_handle != NULL));
4918
4919         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4920         if (res)
4921                 return res;
4922
4923         return (cmos_handle)? 0 : 1;
4924 }
4925
4926 static void cmos_exit(void)
4927 {
4928         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4929 }
4930
4931 static int cmos_read(char *p)
4932 {
4933         int len = 0;
4934
4935         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4936            R30, R31, T20-22, X20-21 */
4937         if (!cmos_handle)
4938                 len += sprintf(p + len, "status:\t\tnot supported\n");
4939         else {
4940                 len += sprintf(p + len, "status:\t\tsupported\n");
4941                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4942         }
4943
4944         return len;
4945 }
4946
4947 static int cmos_write(char *buf)
4948 {
4949         char *cmd;
4950         int cmos_cmd, res;
4951
4952         while ((cmd = next_cmd(&buf))) {
4953                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4954                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4955                         /* cmos_cmd set */
4956                 } else
4957                         return -EINVAL;
4958
4959                 res = issue_thinkpad_cmos_command(cmos_cmd);
4960                 if (res)
4961                         return res;
4962         }
4963
4964         return 0;
4965 }
4966
4967 static struct ibm_struct cmos_driver_data = {
4968         .name = "cmos",
4969         .read = cmos_read,
4970         .write = cmos_write,
4971         .exit = cmos_exit,
4972 };
4973
4974 /*************************************************************************
4975  * LED subdriver
4976  */
4977
4978 enum led_access_mode {
4979         TPACPI_LED_NONE = 0,
4980         TPACPI_LED_570, /* 570 */
4981         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4982         TPACPI_LED_NEW, /* all others */
4983 };
4984
4985 enum {  /* For TPACPI_LED_OLD */
4986         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4987         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4988         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4989 };
4990
4991 static enum led_access_mode led_supported;
4992
4993 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4994            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4995                                 /* T20-22, X20-21 */
4996            "LED",               /* all others */
4997            );                   /* R30, R31 */
4998
4999 #define TPACPI_LED_NUMLEDS 16
5000 static struct tpacpi_led_classdev *tpacpi_leds;
5001 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5002 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5003         /* there's a limit of 19 chars + NULL before 2.6.26 */
5004         "tpacpi::power",
5005         "tpacpi:orange:batt",
5006         "tpacpi:green:batt",
5007         "tpacpi::dock_active",
5008         "tpacpi::bay_active",
5009         "tpacpi::dock_batt",
5010         "tpacpi::unknown_led",
5011         "tpacpi::standby",
5012         "tpacpi::dock_status1",
5013         "tpacpi::dock_status2",
5014         "tpacpi::unknown_led2",
5015         "tpacpi::unknown_led3",
5016         "tpacpi::thinkvantage",
5017 };
5018 #define TPACPI_SAFE_LEDS        0x1081U
5019
5020 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5021 {
5022 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5023         return false;
5024 #else
5025         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5026 #endif
5027 }
5028
5029 static int led_get_status(const unsigned int led)
5030 {
5031         int status;
5032         enum led_status_t led_s;
5033
5034         switch (led_supported) {
5035         case TPACPI_LED_570:
5036                 if (!acpi_evalf(ec_handle,
5037                                 &status, "GLED", "dd", 1 << led))
5038                         return -EIO;
5039                 led_s = (status == 0)?
5040                                 TPACPI_LED_OFF :
5041                                 ((status == 1)?
5042                                         TPACPI_LED_ON :
5043                                         TPACPI_LED_BLINK);
5044                 tpacpi_led_state_cache[led] = led_s;
5045                 return led_s;
5046         default:
5047                 return -ENXIO;
5048         }
5049
5050         /* not reached */
5051 }
5052
5053 static int led_set_status(const unsigned int led,
5054                           const enum led_status_t ledstatus)
5055 {
5056         /* off, on, blink. Index is led_status_t */
5057         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5058         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5059
5060         int rc = 0;
5061
5062         switch (led_supported) {
5063         case TPACPI_LED_570:
5064                 /* 570 */
5065                 if (unlikely(led > 7))
5066                         return -EINVAL;
5067                 if (unlikely(tpacpi_is_led_restricted(led)))
5068                         return -EPERM;
5069                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5070                                 (1 << led), led_sled_arg1[ledstatus]))
5071                         rc = -EIO;
5072                 break;
5073         case TPACPI_LED_OLD:
5074                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5075                 if (unlikely(led > 7))
5076                         return -EINVAL;
5077                 if (unlikely(tpacpi_is_led_restricted(led)))
5078                         return -EPERM;
5079                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5080                 if (rc >= 0)
5081                         rc = ec_write(TPACPI_LED_EC_HLBL,
5082                                       (ledstatus == TPACPI_LED_BLINK) << led);
5083                 if (rc >= 0)
5084                         rc = ec_write(TPACPI_LED_EC_HLCL,
5085                                       (ledstatus != TPACPI_LED_OFF) << led);
5086                 break;
5087         case TPACPI_LED_NEW:
5088                 /* all others */
5089                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5090                         return -EINVAL;
5091                 if (unlikely(tpacpi_is_led_restricted(led)))
5092                         return -EPERM;
5093                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5094                                 led, led_led_arg1[ledstatus]))
5095                         rc = -EIO;
5096                 break;
5097         default:
5098                 rc = -ENXIO;
5099         }
5100
5101         if (!rc)
5102                 tpacpi_led_state_cache[led] = ledstatus;
5103
5104         return rc;
5105 }
5106
5107 static void led_set_status_worker(struct work_struct *work)
5108 {
5109         struct tpacpi_led_classdev *data =
5110                 container_of(work, struct tpacpi_led_classdev, work);
5111
5112         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5113                 led_set_status(data->led, data->new_state);
5114 }
5115
5116 static void led_sysfs_set(struct led_classdev *led_cdev,
5117                         enum led_brightness brightness)
5118 {
5119         struct tpacpi_led_classdev *data = container_of(led_cdev,
5120                              struct tpacpi_led_classdev, led_classdev);
5121
5122         if (brightness == LED_OFF)
5123                 data->new_state = TPACPI_LED_OFF;
5124         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5125                 data->new_state = TPACPI_LED_ON;
5126         else
5127                 data->new_state = TPACPI_LED_BLINK;
5128
5129         queue_work(tpacpi_wq, &data->work);
5130 }
5131
5132 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5133                         unsigned long *delay_on, unsigned long *delay_off)
5134 {
5135         struct tpacpi_led_classdev *data = container_of(led_cdev,
5136                              struct tpacpi_led_classdev, led_classdev);
5137
5138         /* Can we choose the flash rate? */
5139         if (*delay_on == 0 && *delay_off == 0) {
5140                 /* yes. set them to the hardware blink rate (1 Hz) */
5141                 *delay_on = 500; /* ms */
5142                 *delay_off = 500; /* ms */
5143         } else if ((*delay_on != 500) || (*delay_off != 500))
5144                 return -EINVAL;
5145
5146         data->new_state = TPACPI_LED_BLINK;
5147         queue_work(tpacpi_wq, &data->work);
5148
5149         return 0;
5150 }
5151
5152 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5153 {
5154         int rc;
5155
5156         struct tpacpi_led_classdev *data = container_of(led_cdev,
5157                              struct tpacpi_led_classdev, led_classdev);
5158
5159         rc = led_get_status(data->led);
5160
5161         if (rc == TPACPI_LED_OFF || rc < 0)
5162                 rc = LED_OFF;   /* no error handling in led class :( */
5163         else
5164                 rc = LED_FULL;
5165
5166         return rc;
5167 }
5168
5169 static void led_exit(void)
5170 {
5171         unsigned int i;
5172
5173         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5174                 if (tpacpi_leds[i].led_classdev.name)
5175                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5176         }
5177
5178         kfree(tpacpi_leds);
5179 }
5180
5181 static int __init tpacpi_init_led(unsigned int led)
5182 {
5183         int rc;
5184
5185         tpacpi_leds[led].led = led;
5186
5187         /* LEDs with no name don't get registered */
5188         if (!tpacpi_led_names[led])
5189                 return 0;
5190
5191         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5192         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5193         if (led_supported == TPACPI_LED_570)
5194                 tpacpi_leds[led].led_classdev.brightness_get =
5195                                                 &led_sysfs_get;
5196
5197         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5198
5199         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5200
5201         rc = led_classdev_register(&tpacpi_pdev->dev,
5202                                 &tpacpi_leds[led].led_classdev);
5203         if (rc < 0)
5204                 tpacpi_leds[led].led_classdev.name = NULL;
5205
5206         return rc;
5207 }
5208
5209 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5210         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5211         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5212         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5213
5214         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5215         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5216         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5217         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5218         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5219         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5220         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5221         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5222
5223         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5224         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5225         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5226         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5227         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5228
5229         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5230         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5231         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5232         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5233
5234         /* (1) - may have excess leds enabled on MSB */
5235
5236         /* Defaults (order matters, keep last, don't reorder!) */
5237         { /* Lenovo */
5238           .vendor = PCI_VENDOR_ID_LENOVO,
5239           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5240           .quirks = 0x1fffU,
5241         },
5242         { /* IBM ThinkPads with no EC version string */
5243           .vendor = PCI_VENDOR_ID_IBM,
5244           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5245           .quirks = 0x00ffU,
5246         },
5247         { /* IBM ThinkPads with EC version string */
5248           .vendor = PCI_VENDOR_ID_IBM,
5249           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5250           .quirks = 0x00bfU,
5251         },
5252 };
5253
5254 #undef TPACPI_LEDQ_IBM
5255 #undef TPACPI_LEDQ_LNV
5256
5257 static int __init led_init(struct ibm_init_struct *iibm)
5258 {
5259         unsigned int i;
5260         int rc;
5261         unsigned long useful_leds;
5262
5263         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5264
5265         TPACPI_ACPIHANDLE_INIT(led);
5266
5267         if (!led_handle)
5268                 /* led not supported on R30, R31 */
5269                 led_supported = TPACPI_LED_NONE;
5270         else if (strlencmp(led_path, "SLED") == 0)
5271                 /* 570 */
5272                 led_supported = TPACPI_LED_570;
5273         else if (strlencmp(led_path, "SYSL") == 0)
5274                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5275                 led_supported = TPACPI_LED_OLD;
5276         else
5277                 /* all others */
5278                 led_supported = TPACPI_LED_NEW;
5279
5280         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5281                 str_supported(led_supported), led_supported);
5282
5283         if (led_supported == TPACPI_LED_NONE)
5284                 return 1;
5285
5286         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5287                               GFP_KERNEL);
5288         if (!tpacpi_leds) {
5289                 printk(TPACPI_ERR "Out of memory for LED data\n");
5290                 return -ENOMEM;
5291         }
5292
5293         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5294                                           ARRAY_SIZE(led_useful_qtable));
5295
5296         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5297                 if (!tpacpi_is_led_restricted(i) &&
5298                     test_bit(i, &useful_leds)) {
5299                         rc = tpacpi_init_led(i);
5300                         if (rc < 0) {
5301                                 led_exit();
5302                                 return rc;
5303                         }
5304                 }
5305         }
5306
5307 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5308         printk(TPACPI_NOTICE
5309                 "warning: userspace override of important "
5310                 "firmware LEDs is enabled\n");
5311 #endif
5312         return 0;
5313 }
5314
5315 #define str_led_status(s) \
5316         ((s) == TPACPI_LED_OFF ? "off" : \
5317                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5318
5319 static int led_read(char *p)
5320 {
5321         int len = 0;
5322
5323         if (!led_supported) {
5324                 len += sprintf(p + len, "status:\t\tnot supported\n");
5325                 return len;
5326         }
5327         len += sprintf(p + len, "status:\t\tsupported\n");
5328
5329         if (led_supported == TPACPI_LED_570) {
5330                 /* 570 */
5331                 int i, status;
5332                 for (i = 0; i < 8; i++) {
5333                         status = led_get_status(i);
5334                         if (status < 0)
5335                                 return -EIO;
5336                         len += sprintf(p + len, "%d:\t\t%s\n",
5337                                        i, str_led_status(status));
5338                 }
5339         }
5340
5341         len += sprintf(p + len, "commands:\t"
5342                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5343
5344         return len;
5345 }
5346
5347 static int led_write(char *buf)
5348 {
5349         char *cmd;
5350         int led, rc;
5351         enum led_status_t s;
5352
5353         if (!led_supported)
5354                 return -ENODEV;
5355
5356         while ((cmd = next_cmd(&buf))) {
5357                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5358                         return -EINVAL;
5359
5360                 if (strstr(cmd, "off")) {
5361                         s = TPACPI_LED_OFF;
5362                 } else if (strstr(cmd, "on")) {
5363                         s = TPACPI_LED_ON;
5364                 } else if (strstr(cmd, "blink")) {
5365                         s = TPACPI_LED_BLINK;
5366                 } else {
5367                         return -EINVAL;
5368                 }
5369
5370                 rc = led_set_status(led, s);
5371                 if (rc < 0)
5372                         return rc;
5373         }
5374
5375         return 0;
5376 }
5377
5378 static struct ibm_struct led_driver_data = {
5379         .name = "led",
5380         .read = led_read,
5381         .write = led_write,
5382         .exit = led_exit,
5383 };
5384
5385 /*************************************************************************
5386  * Beep subdriver
5387  */
5388
5389 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5390
5391 #define TPACPI_BEEP_Q1 0x0001
5392
5393 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5394         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5395         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5396 };
5397
5398 static int __init beep_init(struct ibm_init_struct *iibm)
5399 {
5400         unsigned long quirks;
5401
5402         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5403
5404         TPACPI_ACPIHANDLE_INIT(beep);
5405
5406         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5407                 str_supported(beep_handle != NULL));
5408
5409         quirks = tpacpi_check_quirks(beep_quirk_table,
5410                                      ARRAY_SIZE(beep_quirk_table));
5411
5412         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5413
5414         return (beep_handle)? 0 : 1;
5415 }
5416
5417 static int beep_read(char *p)
5418 {
5419         int len = 0;
5420
5421         if (!beep_handle)
5422                 len += sprintf(p + len, "status:\t\tnot supported\n");
5423         else {
5424                 len += sprintf(p + len, "status:\t\tsupported\n");
5425                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5426         }
5427
5428         return len;
5429 }
5430
5431 static int beep_write(char *buf)
5432 {
5433         char *cmd;
5434         int beep_cmd;
5435
5436         if (!beep_handle)
5437                 return -ENODEV;
5438
5439         while ((cmd = next_cmd(&buf))) {
5440                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5441                     beep_cmd >= 0 && beep_cmd <= 17) {
5442                         /* beep_cmd set */
5443                 } else
5444                         return -EINVAL;
5445                 if (tp_features.beep_needs_two_args) {
5446                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5447                                         beep_cmd, 0))
5448                                 return -EIO;
5449                 } else {
5450                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5451                                         beep_cmd))
5452                                 return -EIO;
5453                 }
5454         }
5455
5456         return 0;
5457 }
5458
5459 static struct ibm_struct beep_driver_data = {
5460         .name = "beep",
5461         .read = beep_read,
5462         .write = beep_write,
5463 };
5464
5465 /*************************************************************************
5466  * Thermal subdriver
5467  */
5468
5469 enum thermal_access_mode {
5470         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5471         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5472         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5473         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5474         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5475 };
5476
5477 enum { /* TPACPI_THERMAL_TPEC_* */
5478         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5479         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5480         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5481
5482         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5483 };
5484
5485
5486 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5487 struct ibm_thermal_sensors_struct {
5488         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5489 };
5490
5491 static enum thermal_access_mode thermal_read_mode;
5492
5493 /* idx is zero-based */
5494 static int thermal_get_sensor(int idx, s32 *value)
5495 {
5496         int t;
5497         s8 tmp;
5498         char tmpi[5];
5499
5500         t = TP_EC_THERMAL_TMP0;
5501
5502         switch (thermal_read_mode) {
5503 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5504         case TPACPI_THERMAL_TPEC_16:
5505                 if (idx >= 8 && idx <= 15) {
5506                         t = TP_EC_THERMAL_TMP8;
5507                         idx -= 8;
5508                 }
5509                 /* fallthrough */
5510 #endif
5511         case TPACPI_THERMAL_TPEC_8:
5512                 if (idx <= 7) {
5513                         if (!acpi_ec_read(t + idx, &tmp))
5514                                 return -EIO;
5515                         *value = tmp * 1000;
5516                         return 0;
5517                 }
5518                 break;
5519
5520         case TPACPI_THERMAL_ACPI_UPDT:
5521                 if (idx <= 7) {
5522                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5523                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5524                                 return -EIO;
5525                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5526                                 return -EIO;
5527                         *value = (t - 2732) * 100;
5528                         return 0;
5529                 }
5530                 break;
5531
5532         case TPACPI_THERMAL_ACPI_TMP07:
5533                 if (idx <= 7) {
5534                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5535                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5536                                 return -EIO;
5537                         if (t > 127 || t < -127)
5538                                 t = TP_EC_THERMAL_TMP_NA;
5539                         *value = t * 1000;
5540                         return 0;
5541                 }
5542                 break;
5543
5544         case TPACPI_THERMAL_NONE:
5545         default:
5546                 return -ENOSYS;
5547         }
5548
5549         return -EINVAL;
5550 }
5551
5552 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5553 {
5554         int res, i;
5555         int n;
5556
5557         n = 8;
5558         i = 0;
5559
5560         if (!s)
5561                 return -EINVAL;
5562
5563         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5564                 n = 16;
5565
5566         for (i = 0 ; i < n; i++) {
5567                 res = thermal_get_sensor(i, &s->temp[i]);
5568                 if (res)
5569                         return res;
5570         }
5571
5572         return n;
5573 }
5574
5575 static void thermal_dump_all_sensors(void)
5576 {
5577         int n, i;
5578         struct ibm_thermal_sensors_struct t;
5579
5580         n = thermal_get_sensors(&t);
5581         if (n <= 0)
5582                 return;
5583
5584         printk(TPACPI_NOTICE
5585                 "temperatures (Celsius):");
5586
5587         for (i = 0; i < n; i++) {
5588                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5589                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5590                 else
5591                         printk(KERN_CONT " N/A");
5592         }
5593
5594         printk(KERN_CONT "\n");
5595 }
5596
5597 /* sysfs temp##_input -------------------------------------------------- */
5598
5599 static ssize_t thermal_temp_input_show(struct device *dev,
5600                            struct device_attribute *attr,
5601                            char *buf)
5602 {
5603         struct sensor_device_attribute *sensor_attr =
5604                                         to_sensor_dev_attr(attr);
5605         int idx = sensor_attr->index;
5606         s32 value;
5607         int res;
5608
5609         res = thermal_get_sensor(idx, &value);
5610         if (res)
5611                 return res;
5612         if (value == TPACPI_THERMAL_SENSOR_NA)
5613                 return -ENXIO;
5614
5615         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5616 }
5617
5618 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5619          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5620                      thermal_temp_input_show, NULL, _idxB)
5621
5622 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5623         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5624         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5625         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5626         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5627         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5628         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5629         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5630         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5631         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5632         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5633         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5634         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5635         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5636         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5637         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5638         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5639 };
5640
5641 #define THERMAL_ATTRS(X) \
5642         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5643
5644 static struct attribute *thermal_temp_input_attr[] = {
5645         THERMAL_ATTRS(8),
5646         THERMAL_ATTRS(9),
5647         THERMAL_ATTRS(10),
5648         THERMAL_ATTRS(11),
5649         THERMAL_ATTRS(12),
5650         THERMAL_ATTRS(13),
5651         THERMAL_ATTRS(14),
5652         THERMAL_ATTRS(15),
5653         THERMAL_ATTRS(0),
5654         THERMAL_ATTRS(1),
5655         THERMAL_ATTRS(2),
5656         THERMAL_ATTRS(3),
5657         THERMAL_ATTRS(4),
5658         THERMAL_ATTRS(5),
5659         THERMAL_ATTRS(6),
5660         THERMAL_ATTRS(7),
5661         NULL
5662 };
5663
5664 static const struct attribute_group thermal_temp_input16_group = {
5665         .attrs = thermal_temp_input_attr
5666 };
5667
5668 static const struct attribute_group thermal_temp_input8_group = {
5669         .attrs = &thermal_temp_input_attr[8]
5670 };
5671
5672 #undef THERMAL_SENSOR_ATTR_TEMP
5673 #undef THERMAL_ATTRS
5674
5675 /* --------------------------------------------------------------------- */
5676
5677 static int __init thermal_init(struct ibm_init_struct *iibm)
5678 {
5679         u8 t, ta1, ta2;
5680         int i;
5681         int acpi_tmp7;
5682         int res;
5683
5684         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5685
5686         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5687
5688         if (thinkpad_id.ec_model) {
5689                 /*
5690                  * Direct EC access mode: sensors at registers
5691                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5692                  * non-implemented, thermal sensors return 0x80 when
5693                  * not available
5694                  */
5695
5696                 ta1 = ta2 = 0;
5697                 for (i = 0; i < 8; i++) {
5698                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5699                                 ta1 |= t;
5700                         } else {
5701                                 ta1 = 0;
5702                                 break;
5703                         }
5704                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5705                                 ta2 |= t;
5706                         } else {
5707                                 ta1 = 0;
5708                                 break;
5709                         }
5710                 }
5711                 if (ta1 == 0) {
5712                         /* This is sheer paranoia, but we handle it anyway */
5713                         if (acpi_tmp7) {
5714                                 printk(TPACPI_ERR
5715                                        "ThinkPad ACPI EC access misbehaving, "
5716                                        "falling back to ACPI TMPx access "
5717                                        "mode\n");
5718                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5719                         } else {
5720                                 printk(TPACPI_ERR
5721                                        "ThinkPad ACPI EC access misbehaving, "
5722                                        "disabling thermal sensors access\n");
5723                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5724                         }
5725                 } else {
5726                         thermal_read_mode =
5727                             (ta2 != 0) ?
5728                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5729                 }
5730         } else if (acpi_tmp7) {
5731                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5732                         /* 600e/x, 770e, 770x */
5733                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5734                 } else {
5735                         /* Standard ACPI TMPx access, max 8 sensors */
5736                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5737                 }
5738         } else {
5739                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5740                 thermal_read_mode = TPACPI_THERMAL_NONE;
5741         }
5742
5743         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5744                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5745                 thermal_read_mode);
5746
5747         switch (thermal_read_mode) {
5748         case TPACPI_THERMAL_TPEC_16:
5749                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5750                                 &thermal_temp_input16_group);
5751                 if (res)
5752                         return res;
5753                 break;
5754         case TPACPI_THERMAL_TPEC_8:
5755         case TPACPI_THERMAL_ACPI_TMP07:
5756         case TPACPI_THERMAL_ACPI_UPDT:
5757                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5758                                 &thermal_temp_input8_group);
5759                 if (res)
5760                         return res;
5761                 break;
5762         case TPACPI_THERMAL_NONE:
5763         default:
5764                 return 1;
5765         }
5766
5767         return 0;
5768 }
5769
5770 static void thermal_exit(void)
5771 {
5772         switch (thermal_read_mode) {
5773         case TPACPI_THERMAL_TPEC_16:
5774                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5775                                    &thermal_temp_input16_group);
5776                 break;
5777         case TPACPI_THERMAL_TPEC_8:
5778         case TPACPI_THERMAL_ACPI_TMP07:
5779         case TPACPI_THERMAL_ACPI_UPDT:
5780                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5781                                    &thermal_temp_input16_group);
5782                 break;
5783         case TPACPI_THERMAL_NONE:
5784         default:
5785                 break;
5786         }
5787 }
5788
5789 static int thermal_read(char *p)
5790 {
5791         int len = 0;
5792         int n, i;
5793         struct ibm_thermal_sensors_struct t;
5794
5795         n = thermal_get_sensors(&t);
5796         if (unlikely(n < 0))
5797                 return n;
5798
5799         len += sprintf(p + len, "temperatures:\t");
5800
5801         if (n > 0) {
5802                 for (i = 0; i < (n - 1); i++)
5803                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5804                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5805         } else
5806                 len += sprintf(p + len, "not supported\n");
5807
5808         return len;
5809 }
5810
5811 static struct ibm_struct thermal_driver_data = {
5812         .name = "thermal",
5813         .read = thermal_read,
5814         .exit = thermal_exit,
5815 };
5816
5817 /*************************************************************************
5818  * EC Dump subdriver
5819  */
5820
5821 static u8 ecdump_regs[256];
5822
5823 static int ecdump_read(char *p)
5824 {
5825         int len = 0;
5826         int i, j;
5827         u8 v;
5828
5829         len += sprintf(p + len, "EC      "
5830                        " +00 +01 +02 +03 +04 +05 +06 +07"
5831                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5832         for (i = 0; i < 256; i += 16) {
5833                 len += sprintf(p + len, "EC 0x%02x:", i);
5834                 for (j = 0; j < 16; j++) {
5835                         if (!acpi_ec_read(i + j, &v))
5836                                 break;
5837                         if (v != ecdump_regs[i + j])
5838                                 len += sprintf(p + len, " *%02x", v);
5839                         else
5840                                 len += sprintf(p + len, "  %02x", v);
5841                         ecdump_regs[i + j] = v;
5842                 }
5843                 len += sprintf(p + len, "\n");
5844                 if (j != 16)
5845                         break;
5846         }
5847
5848         /* These are way too dangerous to advertise openly... */
5849 #if 0
5850         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5851                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5852         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5853                        " (<offset> is 00-ff, <value> is 0-255)\n");
5854 #endif
5855         return len;
5856 }
5857
5858 static int ecdump_write(char *buf)
5859 {
5860         char *cmd;
5861         int i, v;
5862
5863         while ((cmd = next_cmd(&buf))) {
5864                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5865                         /* i and v set */
5866                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5867                         /* i and v set */
5868                 } else
5869                         return -EINVAL;
5870                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5871                         if (!acpi_ec_write(i, v))
5872                                 return -EIO;
5873                 } else
5874                         return -EINVAL;
5875         }
5876
5877         return 0;
5878 }
5879
5880 static struct ibm_struct ecdump_driver_data = {
5881         .name = "ecdump",
5882         .read = ecdump_read,
5883         .write = ecdump_write,
5884         .flags.experimental = 1,
5885 };
5886
5887 /*************************************************************************
5888  * Backlight/brightness subdriver
5889  */
5890
5891 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5892
5893 /*
5894  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5895  * CMOS NVRAM byte 0x5E, bits 0-3.
5896  *
5897  * EC HBRV (0x31) has the following layout
5898  *   Bit 7: unknown function
5899  *   Bit 6: unknown function
5900  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5901  *   Bit 4: must be set to zero to avoid problems
5902  *   Bit 3-0: backlight brightness level
5903  *
5904  * brightness_get_raw returns status data in the HBRV layout
5905  *
5906  * WARNING: The X61 has been verified to use HBRV for something else, so
5907  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5908  * testing on the very early *60 Lenovo models...
5909  */
5910
5911 enum {
5912         TP_EC_BACKLIGHT = 0x31,
5913
5914         /* TP_EC_BACKLIGHT bitmasks */
5915         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5916         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5917         TP_EC_BACKLIGHT_MAPSW = 0x20,
5918 };
5919
5920 enum tpacpi_brightness_access_mode {
5921         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5922         TPACPI_BRGHT_MODE_EC,           /* EC control */
5923         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5924         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5925         TPACPI_BRGHT_MODE_MAX
5926 };
5927
5928 static struct backlight_device *ibm_backlight_device;
5929
5930 static enum tpacpi_brightness_access_mode brightness_mode =
5931                 TPACPI_BRGHT_MODE_MAX;
5932
5933 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5934
5935 static struct mutex brightness_mutex;
5936
5937 /* NVRAM brightness access,
5938  * call with brightness_mutex held! */
5939 static unsigned int tpacpi_brightness_nvram_get(void)
5940 {
5941         u8 lnvram;
5942
5943         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5944                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5945                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5946         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5947
5948         return lnvram;
5949 }
5950
5951 static void tpacpi_brightness_checkpoint_nvram(void)
5952 {
5953         u8 lec = 0;
5954         u8 b_nvram;
5955
5956         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5957                 return;
5958
5959         vdbg_printk(TPACPI_DBG_BRGHT,
5960                 "trying to checkpoint backlight level to NVRAM...\n");
5961
5962         if (mutex_lock_killable(&brightness_mutex) < 0)
5963                 return;
5964
5965         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5966                 goto unlock;
5967         lec &= TP_EC_BACKLIGHT_LVLMSK;
5968         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5969
5970         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5971                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5972                 /* NVRAM needs update */
5973                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5974                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5975                 b_nvram |= lec;
5976                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5977                 dbg_printk(TPACPI_DBG_BRGHT,
5978                            "updated NVRAM backlight level to %u (0x%02x)\n",
5979                            (unsigned int) lec, (unsigned int) b_nvram);
5980         } else
5981                 vdbg_printk(TPACPI_DBG_BRGHT,
5982                            "NVRAM backlight level already is %u (0x%02x)\n",
5983                            (unsigned int) lec, (unsigned int) b_nvram);
5984
5985 unlock:
5986         mutex_unlock(&brightness_mutex);
5987 }
5988
5989
5990 /* call with brightness_mutex held! */
5991 static int tpacpi_brightness_get_raw(int *status)
5992 {
5993         u8 lec = 0;
5994
5995         switch (brightness_mode) {
5996         case TPACPI_BRGHT_MODE_UCMS_STEP:
5997                 *status = tpacpi_brightness_nvram_get();
5998                 return 0;
5999         case TPACPI_BRGHT_MODE_EC:
6000         case TPACPI_BRGHT_MODE_ECNVRAM:
6001                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6002                         return -EIO;
6003                 *status = lec;
6004                 return 0;
6005         default:
6006                 return -ENXIO;
6007         }
6008 }
6009
6010 /* call with brightness_mutex held! */
6011 /* do NOT call with illegal backlight level value */
6012 static int tpacpi_brightness_set_ec(unsigned int value)
6013 {
6014         u8 lec = 0;
6015
6016         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6017                 return -EIO;
6018
6019         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6020                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6021                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6022                 return -EIO;
6023
6024         return 0;
6025 }
6026
6027 /* call with brightness_mutex held! */
6028 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6029 {
6030         int cmos_cmd, inc;
6031         unsigned int current_value, i;
6032
6033         current_value = tpacpi_brightness_nvram_get();
6034
6035         if (value == current_value)
6036                 return 0;
6037
6038         cmos_cmd = (value > current_value) ?
6039                         TP_CMOS_BRIGHTNESS_UP :
6040                         TP_CMOS_BRIGHTNESS_DOWN;
6041         inc = (value > current_value) ? 1 : -1;
6042
6043         for (i = current_value; i != value; i += inc)
6044                 if (issue_thinkpad_cmos_command(cmos_cmd))
6045                         return -EIO;
6046
6047         return 0;
6048 }
6049
6050 /* May return EINTR which can always be mapped to ERESTARTSYS */
6051 static int brightness_set(unsigned int value)
6052 {
6053         int res;
6054
6055         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6056             value < 0)
6057                 return -EINVAL;
6058
6059         vdbg_printk(TPACPI_DBG_BRGHT,
6060                         "set backlight level to %d\n", value);
6061
6062         res = mutex_lock_killable(&brightness_mutex);
6063         if (res < 0)
6064                 return res;
6065
6066         switch (brightness_mode) {
6067         case TPACPI_BRGHT_MODE_EC:
6068         case TPACPI_BRGHT_MODE_ECNVRAM:
6069                 res = tpacpi_brightness_set_ec(value);
6070                 break;
6071         case TPACPI_BRGHT_MODE_UCMS_STEP:
6072                 res = tpacpi_brightness_set_ucmsstep(value);
6073                 break;
6074         default:
6075                 res = -ENXIO;
6076         }
6077
6078         mutex_unlock(&brightness_mutex);
6079         return res;
6080 }
6081
6082 /* sysfs backlight class ----------------------------------------------- */
6083
6084 static int brightness_update_status(struct backlight_device *bd)
6085 {
6086         unsigned int level =
6087                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6088                  bd->props.power == FB_BLANK_UNBLANK) ?
6089                                 bd->props.brightness : 0;
6090
6091         dbg_printk(TPACPI_DBG_BRGHT,
6092                         "backlight: attempt to set level to %d\n",
6093                         level);
6094
6095         /* it is the backlight class's job (caller) to handle
6096          * EINTR and other errors properly */
6097         return brightness_set(level);
6098 }
6099
6100 static int brightness_get(struct backlight_device *bd)
6101 {
6102         int status, res;
6103
6104         res = mutex_lock_killable(&brightness_mutex);
6105         if (res < 0)
6106                 return 0;
6107
6108         res = tpacpi_brightness_get_raw(&status);
6109
6110         mutex_unlock(&brightness_mutex);
6111
6112         if (res < 0)
6113                 return 0;
6114
6115         return status & TP_EC_BACKLIGHT_LVLMSK;
6116 }
6117
6118 static void tpacpi_brightness_notify_change(void)
6119 {
6120         backlight_force_update(ibm_backlight_device,
6121                                BACKLIGHT_UPDATE_HOTKEY);
6122 }
6123
6124 static struct backlight_ops ibm_backlight_data = {
6125         .get_brightness = brightness_get,
6126         .update_status  = brightness_update_status,
6127 };
6128
6129 /* --------------------------------------------------------------------- */
6130
6131 /*
6132  * These are only useful for models that have only one possibility
6133  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6134  * these quirks.
6135  */
6136 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6137 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6138 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6139
6140 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6141         /* Models with ATI GPUs known to require ECNVRAM mode */
6142         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6143
6144         /* Models with ATI GPUs that can use ECNVRAM */
6145         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6146         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6147         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6148         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6149
6150         /* Models with Intel Extreme Graphics 2 */
6151         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6152         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6153         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6154
6155         /* Models with Intel GMA900 */
6156         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6157         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6158         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6159 };
6160
6161 static int __init brightness_init(struct ibm_init_struct *iibm)
6162 {
6163         int b;
6164         unsigned long quirks;
6165
6166         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6167
6168         mutex_init(&brightness_mutex);
6169
6170         quirks = tpacpi_check_quirks(brightness_quirk_table,
6171                                 ARRAY_SIZE(brightness_quirk_table));
6172
6173         /*
6174          * We always attempt to detect acpi support, so as to switch
6175          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6176          * going to publish a backlight interface
6177          */
6178         b = tpacpi_check_std_acpi_brightness_support();
6179         if (b > 0) {
6180
6181                 if (acpi_video_backlight_support()) {
6182                         if (brightness_enable > 1) {
6183                                 printk(TPACPI_NOTICE
6184                                        "Standard ACPI backlight interface "
6185                                        "available, not loading native one.\n");
6186                                 return 1;
6187                         } else if (brightness_enable == 1) {
6188                                 printk(TPACPI_NOTICE
6189                                        "Backlight control force enabled, even if standard "
6190                                        "ACPI backlight interface is available\n");
6191                         }
6192                 } else {
6193                         if (brightness_enable > 1) {
6194                                 printk(TPACPI_NOTICE
6195                                        "Standard ACPI backlight interface not "
6196                                        "available, thinkpad_acpi native "
6197                                        "brightness control enabled\n");
6198                         }
6199                 }
6200         }
6201
6202         if (!brightness_enable) {
6203                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6204                            "brightness support disabled by "
6205                            "module parameter\n");
6206                 return 1;
6207         }
6208
6209         if (b > 16) {
6210                 printk(TPACPI_ERR
6211                        "Unsupported brightness interface, "
6212                        "please contact %s\n", TPACPI_MAIL);
6213                 return 1;
6214         }
6215         if (b == 16)
6216                 tp_features.bright_16levels = 1;
6217
6218         /*
6219          * Check for module parameter bogosity, note that we
6220          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6221          * able to detect "unspecified"
6222          */
6223         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6224                 return -EINVAL;
6225
6226         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6227         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6228             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6229                 if (quirks & TPACPI_BRGHT_Q_EC)
6230                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6231                 else
6232                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6233
6234                 dbg_printk(TPACPI_DBG_BRGHT,
6235                            "driver auto-selected brightness_mode=%d\n",
6236                            brightness_mode);
6237         }
6238
6239         /* Safety */
6240         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6241             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6242              brightness_mode == TPACPI_BRGHT_MODE_EC))
6243                 return -EINVAL;
6244
6245         if (tpacpi_brightness_get_raw(&b) < 0)
6246                 return 1;
6247
6248         if (tp_features.bright_16levels)
6249                 printk(TPACPI_INFO
6250                        "detected a 16-level brightness capable ThinkPad\n");
6251
6252         ibm_backlight_device = backlight_device_register(
6253                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6254                                         &ibm_backlight_data);
6255         if (IS_ERR(ibm_backlight_device)) {
6256                 int rc = PTR_ERR(ibm_backlight_device);
6257                 ibm_backlight_device = NULL;
6258                 printk(TPACPI_ERR "Could not register backlight device\n");
6259                 return rc;
6260         }
6261         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6262                         "brightness is supported\n");
6263
6264         if (quirks & TPACPI_BRGHT_Q_ASK) {
6265                 printk(TPACPI_NOTICE
6266                         "brightness: will use unverified default: "
6267                         "brightness_mode=%d\n", brightness_mode);
6268                 printk(TPACPI_NOTICE
6269                         "brightness: please report to %s whether it works well "
6270                         "or not on your ThinkPad\n", TPACPI_MAIL);
6271         }
6272
6273         ibm_backlight_device->props.max_brightness =
6274                                 (tp_features.bright_16levels)? 15 : 7;
6275         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6276         backlight_update_status(ibm_backlight_device);
6277
6278         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6279                         "brightness: registering brightness hotkeys "
6280                         "as change notification\n");
6281         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6282                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6283                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6284         return 0;
6285 }
6286
6287 static void brightness_suspend(pm_message_t state)
6288 {
6289         tpacpi_brightness_checkpoint_nvram();
6290 }
6291
6292 static void brightness_shutdown(void)
6293 {
6294         tpacpi_brightness_checkpoint_nvram();
6295 }
6296
6297 static void brightness_exit(void)
6298 {
6299         if (ibm_backlight_device) {
6300                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6301                             "calling backlight_device_unregister()\n");
6302                 backlight_device_unregister(ibm_backlight_device);
6303         }
6304
6305         tpacpi_brightness_checkpoint_nvram();
6306 }
6307
6308 static int brightness_read(char *p)
6309 {
6310         int len = 0;
6311         int level;
6312
6313         level = brightness_get(NULL);
6314         if (level < 0) {
6315                 len += sprintf(p + len, "level:\t\tunreadable\n");
6316         } else {
6317                 len += sprintf(p + len, "level:\t\t%d\n", level);
6318                 len += sprintf(p + len, "commands:\tup, down\n");
6319                 len += sprintf(p + len, "commands:\tlevel <level>"
6320                                " (<level> is 0-%d)\n",
6321                                (tp_features.bright_16levels) ? 15 : 7);
6322         }
6323
6324         return len;
6325 }
6326
6327 static int brightness_write(char *buf)
6328 {
6329         int level;
6330         int rc;
6331         char *cmd;
6332         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6333
6334         level = brightness_get(NULL);
6335         if (level < 0)
6336                 return level;
6337
6338         while ((cmd = next_cmd(&buf))) {
6339                 if (strlencmp(cmd, "up") == 0) {
6340                         if (level < max_level)
6341                                 level++;
6342                 } else if (strlencmp(cmd, "down") == 0) {
6343                         if (level > 0)
6344                                 level--;
6345                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6346                            level >= 0 && level <= max_level) {
6347                         /* new level set */
6348                 } else
6349                         return -EINVAL;
6350         }
6351
6352         tpacpi_disclose_usertask("procfs brightness",
6353                         "set level to %d\n", level);
6354
6355         /*
6356          * Now we know what the final level should be, so we try to set it.
6357          * Doing it this way makes the syscall restartable in case of EINTR
6358          */
6359         rc = brightness_set(level);
6360         if (!rc && ibm_backlight_device)
6361                 backlight_force_update(ibm_backlight_device,
6362                                         BACKLIGHT_UPDATE_SYSFS);
6363         return (rc == -EINTR)? -ERESTARTSYS : rc;
6364 }
6365
6366 static struct ibm_struct brightness_driver_data = {
6367         .name = "brightness",
6368         .read = brightness_read,
6369         .write = brightness_write,
6370         .exit = brightness_exit,
6371         .suspend = brightness_suspend,
6372         .shutdown = brightness_shutdown,
6373 };
6374
6375 /*************************************************************************
6376  * Volume subdriver
6377  */
6378
6379 /*
6380  * IBM ThinkPads have a simple volume controller with MUTE gating.
6381  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6382  *
6383  * Since the *61 series (and probably also the later *60 series), Lenovo
6384  * ThinkPads only implement the MUTE gate.
6385  *
6386  * EC register 0x30
6387  *   Bit 6: MUTE (1 mutes sound)
6388  *   Bit 3-0: Volume
6389  *   Other bits should be zero as far as we know.
6390  *
6391  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6392  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6393  * such as bit 7 which is used to detect repeated presses of MUTE,
6394  * and we leave them unchanged.
6395  */
6396
6397 enum {
6398         TP_EC_AUDIO = 0x30,
6399
6400         /* TP_EC_AUDIO bits */
6401         TP_EC_AUDIO_MUTESW = 6,
6402
6403         /* TP_EC_AUDIO bitmasks */
6404         TP_EC_AUDIO_LVL_MSK = 0x0F,
6405         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6406
6407         /* Maximum volume */
6408         TP_EC_VOLUME_MAX = 14,
6409 };
6410
6411 enum tpacpi_volume_access_mode {
6412         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6413         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6414         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6415         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6416         TPACPI_VOL_MODE_MAX
6417 };
6418
6419 static enum tpacpi_volume_access_mode volume_mode =
6420         TPACPI_VOL_MODE_MAX;
6421
6422
6423 /*
6424  * Used to syncronize writers to TP_EC_AUDIO and
6425  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6426  */
6427 static struct mutex volume_mutex;
6428
6429 static void tpacpi_volume_checkpoint_nvram(void)
6430 {
6431         u8 lec = 0;
6432         u8 b_nvram;
6433         const u8 ec_mask = TP_EC_AUDIO_LVL_MSK | TP_EC_AUDIO_MUTESW_MSK;
6434
6435         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6436                 return;
6437
6438         vdbg_printk(TPACPI_DBG_MIXER,
6439                 "trying to checkpoint mixer state to NVRAM...\n");
6440
6441         if (mutex_lock_killable(&volume_mutex) < 0)
6442                 return;
6443
6444         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6445                 goto unlock;
6446         lec &= ec_mask;
6447         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6448
6449         if (lec != (b_nvram & ec_mask)) {
6450                 /* NVRAM needs update */
6451                 b_nvram &= ~ec_mask;
6452                 b_nvram |= lec;
6453                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6454                 dbg_printk(TPACPI_DBG_MIXER,
6455                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6456                            (unsigned int) lec, (unsigned int) b_nvram);
6457         } else {
6458                 vdbg_printk(TPACPI_DBG_MIXER,
6459                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6460                            (unsigned int) lec, (unsigned int) b_nvram);
6461         }
6462
6463 unlock:
6464         mutex_unlock(&volume_mutex);
6465 }
6466
6467 static int volume_get_status_ec(u8 *status)
6468 {
6469         u8 s;
6470
6471         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6472                 return -EIO;
6473
6474         *status = s;
6475
6476         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6477
6478         return 0;
6479 }
6480
6481 static int volume_get_status(u8 *status)
6482 {
6483         return volume_get_status_ec(status);
6484 }
6485
6486 static int volume_set_status_ec(const u8 status)
6487 {
6488         if (!acpi_ec_write(TP_EC_AUDIO, status))
6489                 return -EIO;
6490
6491         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6492
6493         return 0;
6494 }
6495
6496 static int volume_set_status(const u8 status)
6497 {
6498         return volume_set_status_ec(status);
6499 }
6500
6501 static int volume_set_mute_ec(const bool mute)
6502 {
6503         int rc;
6504         u8 s, n;
6505
6506         if (mutex_lock_killable(&volume_mutex) < 0)
6507                 return -EINTR;
6508
6509         rc = volume_get_status_ec(&s);
6510         if (rc)
6511                 goto unlock;
6512
6513         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6514                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6515
6516         if (n != s)
6517                 rc = volume_set_status_ec(n);
6518
6519 unlock:
6520         mutex_unlock(&volume_mutex);
6521         return rc;
6522 }
6523
6524 static int volume_set_mute(const bool mute)
6525 {
6526         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6527                    (mute) ? "" : "un");
6528         return volume_set_mute_ec(mute);
6529 }
6530
6531 static int volume_set_volume_ec(const u8 vol)
6532 {
6533         int rc;
6534         u8 s, n;
6535
6536         if (vol > TP_EC_VOLUME_MAX)
6537                 return -EINVAL;
6538
6539         if (mutex_lock_killable(&volume_mutex) < 0)
6540                 return -EINTR;
6541
6542         rc = volume_get_status_ec(&s);
6543         if (rc)
6544                 goto unlock;
6545
6546         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6547
6548         if (n != s)
6549                 rc = volume_set_status_ec(n);
6550
6551 unlock:
6552         mutex_unlock(&volume_mutex);
6553         return rc;
6554 }
6555
6556 static int volume_set_volume(const u8 vol)
6557 {
6558         dbg_printk(TPACPI_DBG_MIXER,
6559                    "trying to set volume level to %hu\n", vol);
6560         return volume_set_volume_ec(vol);
6561 }
6562
6563 static void volume_suspend(pm_message_t state)
6564 {
6565         tpacpi_volume_checkpoint_nvram();
6566 }
6567
6568 static void volume_shutdown(void)
6569 {
6570         tpacpi_volume_checkpoint_nvram();
6571 }
6572
6573 static void volume_exit(void)
6574 {
6575         tpacpi_volume_checkpoint_nvram();
6576 }
6577
6578 static int __init volume_init(struct ibm_init_struct *iibm)
6579 {
6580         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6581
6582         mutex_init(&volume_mutex);
6583
6584         /*
6585          * Check for module parameter bogosity, note that we
6586          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6587          * able to detect "unspecified"
6588          */
6589         if (volume_mode > TPACPI_VOL_MODE_MAX)
6590                 return -EINVAL;
6591
6592         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6593                 printk(TPACPI_ERR
6594                         "UCMS step volume mode not implemented, "
6595                         "please contact %s\n", TPACPI_MAIL);
6596                 return 1;
6597         }
6598
6599         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6600             volume_mode == TPACPI_VOL_MODE_MAX) {
6601                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6602
6603                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6604                                 "driver auto-selected volume_mode=%d\n",
6605                                 volume_mode);
6606         } else {
6607                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6608                                 "using user-supplied volume_mode=%d\n",
6609                                 volume_mode);
6610         }
6611
6612         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6613                         "volume is supported\n");
6614
6615         return 0;
6616 }
6617
6618 static int volume_read(char *p)
6619 {
6620         int len = 0;
6621         u8 status;
6622
6623         if (volume_get_status(&status) < 0) {
6624                 len += sprintf(p + len, "level:\t\tunreadable\n");
6625         } else {
6626                 len += sprintf(p + len, "level:\t\t%d\n",
6627                                 status & TP_EC_AUDIO_LVL_MSK);
6628                 len += sprintf(p + len, "mute:\t\t%s\n",
6629                                 onoff(status, TP_EC_AUDIO_MUTESW));
6630                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6631                 len += sprintf(p + len, "commands:\tlevel <level>"
6632                                " (<level> is 0-%d)\n", TP_EC_VOLUME_MAX);
6633         }
6634
6635         return len;
6636 }
6637
6638 static int volume_write(char *buf)
6639 {
6640         u8 s;
6641         u8 new_level, new_mute;
6642         int l;
6643         char *cmd;
6644         int rc;
6645
6646         rc = volume_get_status(&s);
6647         if (rc < 0)
6648                 return rc;
6649
6650         new_level = s & TP_EC_AUDIO_LVL_MSK;
6651         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
6652
6653         while ((cmd = next_cmd(&buf))) {
6654                 if (strlencmp(cmd, "up") == 0) {
6655                         if (new_mute)
6656                                 new_mute = 0;
6657                         else if (new_level < TP_EC_VOLUME_MAX)
6658                                 new_level++;
6659                 } else if (strlencmp(cmd, "down") == 0) {
6660                         if (new_mute)
6661                                 new_mute = 0;
6662                         else if (new_level > 0)
6663                                 new_level--;
6664                 } else if (sscanf(cmd, "level %u", &l) == 1 &&
6665                            l >= 0 && l <= TP_EC_VOLUME_MAX) {
6666                                 new_level = l;
6667                 } else if (strlencmp(cmd, "mute") == 0) {
6668                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
6669                 } else
6670                         return -EINVAL;
6671         }
6672
6673         tpacpi_disclose_usertask("procfs volume",
6674                                 "%smute and set level to %d\n",
6675                                 new_mute ? "" : "un", new_level);
6676
6677         rc = volume_set_status(new_mute | new_level);
6678
6679         return (rc == -EINTR) ? -ERESTARTSYS : rc;
6680 }
6681
6682 static struct ibm_struct volume_driver_data = {
6683         .name = "volume",
6684         .read = volume_read,
6685         .write = volume_write,
6686         .exit = volume_exit,
6687         .suspend = volume_suspend,
6688         .shutdown = volume_shutdown,
6689 };
6690
6691 /*************************************************************************
6692  * Fan subdriver
6693  */
6694
6695 /*
6696  * FAN ACCESS MODES
6697  *
6698  * TPACPI_FAN_RD_ACPI_GFAN:
6699  *      ACPI GFAN method: returns fan level
6700  *
6701  *      see TPACPI_FAN_WR_ACPI_SFAN
6702  *      EC 0x2f (HFSP) not available if GFAN exists
6703  *
6704  * TPACPI_FAN_WR_ACPI_SFAN:
6705  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6706  *
6707  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6708  *      it for writing.
6709  *
6710  * TPACPI_FAN_WR_TPEC:
6711  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6712  *      Supported on almost all ThinkPads
6713  *
6714  *      Fan speed changes of any sort (including those caused by the
6715  *      disengaged mode) are usually done slowly by the firmware as the
6716  *      maximum ammount of fan duty cycle change per second seems to be
6717  *      limited.
6718  *
6719  *      Reading is not available if GFAN exists.
6720  *      Writing is not available if SFAN exists.
6721  *
6722  *      Bits
6723  *       7      automatic mode engaged;
6724  *              (default operation mode of the ThinkPad)
6725  *              fan level is ignored in this mode.
6726  *       6      full speed mode (takes precedence over bit 7);
6727  *              not available on all thinkpads.  May disable
6728  *              the tachometer while the fan controller ramps up
6729  *              the speed (which can take up to a few *minutes*).
6730  *              Speeds up fan to 100% duty-cycle, which is far above
6731  *              the standard RPM levels.  It is not impossible that
6732  *              it could cause hardware damage.
6733  *      5-3     unused in some models.  Extra bits for fan level
6734  *              in others, but still useless as all values above
6735  *              7 map to the same speed as level 7 in these models.
6736  *      2-0     fan level (0..7 usually)
6737  *                      0x00 = stop
6738  *                      0x07 = max (set when temperatures critical)
6739  *              Some ThinkPads may have other levels, see
6740  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6741  *
6742  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6743  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6744  *      does so, its initial value is meaningless (0x07).
6745  *
6746  *      For firmware bugs, refer to:
6747  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6748  *
6749  *      ----
6750  *
6751  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6752  *      Main fan tachometer reading (in RPM)
6753  *
6754  *      This register is present on all ThinkPads with a new-style EC, and
6755  *      it is known not to be present on the A21m/e, and T22, as there is
6756  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6757  *      ThinkPads from this same time period (and earlier) probably lack the
6758  *      tachometer as well.
6759  *
6760  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6761  *      was never fixed by IBM to report the EC firmware version string
6762  *      probably support the tachometer (like the early X models), so
6763  *      detecting it is quite hard.  We need more data to know for sure.
6764  *
6765  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6766  *      might result.
6767  *
6768  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6769  *      mode.
6770  *
6771  *      For firmware bugs, refer to:
6772  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6773  *
6774  *      ----
6775  *
6776  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6777  *
6778  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6779  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6780  *      is one, the tachometer registers show the speed of the auxiliary
6781  *      fan.
6782  *
6783  *      Fan control seems to affect both fans, regardless of the state
6784  *      of this bit.
6785  *
6786  *      So far, only the firmware for the X60/X61 non-tablet versions
6787  *      seem to support this (firmware TP-7M).
6788  *
6789  * TPACPI_FAN_WR_ACPI_FANS:
6790  *      ThinkPad X31, X40, X41.  Not available in the X60.
6791  *
6792  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6793  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6794  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6795  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6796  *
6797  *      The speeds are stored on handles
6798  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6799  *
6800  *      There are three default speed sets, acessible as handles:
6801  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6802  *
6803  *      ACPI DSDT switches which set is in use depending on various
6804  *      factors.
6805  *
6806  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6807  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6808  *      but the ACPI tables just mention level 7.
6809  */
6810
6811 enum {                                  /* Fan control constants */
6812         fan_status_offset = 0x2f,       /* EC register 0x2f */
6813         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6814                                          * 0x84 must be read before 0x85 */
6815         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6816                                            bit 0 selects which fan is active */
6817
6818         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6819         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6820
6821         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6822 };
6823
6824 enum fan_status_access_mode {
6825         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6826         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6827         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6828 };
6829
6830 enum fan_control_access_mode {
6831         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6832         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6833         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6834         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6835 };
6836
6837 enum fan_control_commands {
6838         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6839         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6840         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6841                                                  * and also watchdog cmd */
6842 };
6843
6844 static int fan_control_allowed;
6845
6846 static enum fan_status_access_mode fan_status_access_mode;
6847 static enum fan_control_access_mode fan_control_access_mode;
6848 static enum fan_control_commands fan_control_commands;
6849
6850 static u8 fan_control_initial_status;
6851 static u8 fan_control_desired_level;
6852 static u8 fan_control_resume_level;
6853 static int fan_watchdog_maxinterval;
6854
6855 static struct mutex fan_mutex;
6856
6857 static void fan_watchdog_fire(struct work_struct *ignored);
6858 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6859
6860 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6861 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6862            "\\FSPD",            /* 600e/x, 770e, 770x */
6863            );                   /* all others */
6864 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6865            "JFNS",              /* 770x-JL */
6866            );                   /* all others */
6867
6868 /*
6869  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6870  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6871  * be in auto mode (0x80).
6872  *
6873  * This is corrected by any write to HFSP either by the driver, or
6874  * by the firmware.
6875  *
6876  * We assume 0x07 really means auto mode while this quirk is active,
6877  * as this is far more likely than the ThinkPad being in level 7,
6878  * which is only used by the firmware during thermal emergencies.
6879  *
6880  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6881  * TP-70 (T43, R52), which are known to be buggy.
6882  */
6883
6884 static void fan_quirk1_setup(void)
6885 {
6886         if (fan_control_initial_status == 0x07) {
6887                 printk(TPACPI_NOTICE
6888                        "fan_init: initial fan status is unknown, "
6889                        "assuming it is in auto mode\n");
6890                 tp_features.fan_ctrl_status_undef = 1;
6891         }
6892 }
6893
6894 static void fan_quirk1_handle(u8 *fan_status)
6895 {
6896         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6897                 if (*fan_status != fan_control_initial_status) {
6898                         /* something changed the HFSP regisnter since
6899                          * driver init time, so it is not undefined
6900                          * anymore */
6901                         tp_features.fan_ctrl_status_undef = 0;
6902                 } else {
6903                         /* Return most likely status. In fact, it
6904                          * might be the only possible status */
6905                         *fan_status = TP_EC_FAN_AUTO;
6906                 }
6907         }
6908 }
6909
6910 /* Select main fan on X60/X61, NOOP on others */
6911 static bool fan_select_fan1(void)
6912 {
6913         if (tp_features.second_fan) {
6914                 u8 val;
6915
6916                 if (ec_read(fan_select_offset, &val) < 0)
6917                         return false;
6918                 val &= 0xFEU;
6919                 if (ec_write(fan_select_offset, val) < 0)
6920                         return false;
6921         }
6922         return true;
6923 }
6924
6925 /* Select secondary fan on X60/X61 */
6926 static bool fan_select_fan2(void)
6927 {
6928         u8 val;
6929
6930         if (!tp_features.second_fan)
6931                 return false;
6932
6933         if (ec_read(fan_select_offset, &val) < 0)
6934                 return false;
6935         val |= 0x01U;
6936         if (ec_write(fan_select_offset, val) < 0)
6937                 return false;
6938
6939         return true;
6940 }
6941
6942 /*
6943  * Call with fan_mutex held
6944  */
6945 static void fan_update_desired_level(u8 status)
6946 {
6947         if ((status &
6948              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6949                 if (status > 7)
6950                         fan_control_desired_level = 7;
6951                 else
6952                         fan_control_desired_level = status;
6953         }
6954 }
6955
6956 static int fan_get_status(u8 *status)
6957 {
6958         u8 s;
6959
6960         /* TODO:
6961          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6962
6963         switch (fan_status_access_mode) {
6964         case TPACPI_FAN_RD_ACPI_GFAN:
6965                 /* 570, 600e/x, 770e, 770x */
6966
6967                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6968                         return -EIO;
6969
6970                 if (likely(status))
6971                         *status = s & 0x07;
6972
6973                 break;
6974
6975         case TPACPI_FAN_RD_TPEC:
6976                 /* all except 570, 600e/x, 770e, 770x */
6977                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6978                         return -EIO;
6979
6980                 if (likely(status)) {
6981                         *status = s;
6982                         fan_quirk1_handle(status);
6983                 }
6984
6985                 break;
6986
6987         default:
6988                 return -ENXIO;
6989         }
6990
6991         return 0;
6992 }
6993
6994 static int fan_get_status_safe(u8 *status)
6995 {
6996         int rc;
6997         u8 s;
6998
6999         if (mutex_lock_killable(&fan_mutex))
7000                 return -ERESTARTSYS;
7001         rc = fan_get_status(&s);
7002         if (!rc)
7003                 fan_update_desired_level(s);
7004         mutex_unlock(&fan_mutex);
7005
7006         if (status)
7007                 *status = s;
7008
7009         return rc;
7010 }
7011
7012 static int fan_get_speed(unsigned int *speed)
7013 {
7014         u8 hi, lo;
7015
7016         switch (fan_status_access_mode) {
7017         case TPACPI_FAN_RD_TPEC:
7018                 /* all except 570, 600e/x, 770e, 770x */
7019                 if (unlikely(!fan_select_fan1()))
7020                         return -EIO;
7021                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7022                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7023                         return -EIO;
7024
7025                 if (likely(speed))
7026                         *speed = (hi << 8) | lo;
7027
7028                 break;
7029
7030         default:
7031                 return -ENXIO;
7032         }
7033
7034         return 0;
7035 }
7036
7037 static int fan2_get_speed(unsigned int *speed)
7038 {
7039         u8 hi, lo;
7040         bool rc;
7041
7042         switch (fan_status_access_mode) {
7043         case TPACPI_FAN_RD_TPEC:
7044                 /* all except 570, 600e/x, 770e, 770x */
7045                 if (unlikely(!fan_select_fan2()))
7046                         return -EIO;
7047                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7048                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7049                 fan_select_fan1(); /* play it safe */
7050                 if (rc)
7051                         return -EIO;
7052
7053                 if (likely(speed))
7054                         *speed = (hi << 8) | lo;
7055
7056                 break;
7057
7058         default:
7059                 return -ENXIO;
7060         }
7061
7062         return 0;
7063 }
7064
7065 static int fan_set_level(int level)
7066 {
7067         if (!fan_control_allowed)
7068                 return -EPERM;
7069
7070         switch (fan_control_access_mode) {
7071         case TPACPI_FAN_WR_ACPI_SFAN:
7072                 if (level >= 0 && level <= 7) {
7073                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7074                                 return -EIO;
7075                 } else
7076                         return -EINVAL;
7077                 break;
7078
7079         case TPACPI_FAN_WR_ACPI_FANS:
7080         case TPACPI_FAN_WR_TPEC:
7081                 if (!(level & TP_EC_FAN_AUTO) &&
7082                     !(level & TP_EC_FAN_FULLSPEED) &&
7083                     ((level < 0) || (level > 7)))
7084                         return -EINVAL;
7085
7086                 /* safety net should the EC not support AUTO
7087                  * or FULLSPEED mode bits and just ignore them */
7088                 if (level & TP_EC_FAN_FULLSPEED)
7089                         level |= 7;     /* safety min speed 7 */
7090                 else if (level & TP_EC_FAN_AUTO)
7091                         level |= 4;     /* safety min speed 4 */
7092
7093                 if (!acpi_ec_write(fan_status_offset, level))
7094                         return -EIO;
7095                 else
7096                         tp_features.fan_ctrl_status_undef = 0;
7097                 break;
7098
7099         default:
7100                 return -ENXIO;
7101         }
7102
7103         vdbg_printk(TPACPI_DBG_FAN,
7104                 "fan control: set fan control register to 0x%02x\n", level);
7105         return 0;
7106 }
7107
7108 static int fan_set_level_safe(int level)
7109 {
7110         int rc;
7111
7112         if (!fan_control_allowed)
7113                 return -EPERM;
7114
7115         if (mutex_lock_killable(&fan_mutex))
7116                 return -ERESTARTSYS;
7117
7118         if (level == TPACPI_FAN_LAST_LEVEL)
7119                 level = fan_control_desired_level;
7120
7121         rc = fan_set_level(level);
7122         if (!rc)
7123                 fan_update_desired_level(level);
7124
7125         mutex_unlock(&fan_mutex);
7126         return rc;
7127 }
7128
7129 static int fan_set_enable(void)
7130 {
7131         u8 s;
7132         int rc;
7133
7134         if (!fan_control_allowed)
7135                 return -EPERM;
7136
7137         if (mutex_lock_killable(&fan_mutex))
7138                 return -ERESTARTSYS;
7139
7140         switch (fan_control_access_mode) {
7141         case TPACPI_FAN_WR_ACPI_FANS:
7142         case TPACPI_FAN_WR_TPEC:
7143                 rc = fan_get_status(&s);
7144                 if (rc < 0)
7145                         break;
7146
7147                 /* Don't go out of emergency fan mode */
7148                 if (s != 7) {
7149                         s &= 0x07;
7150                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7151                 }
7152
7153                 if (!acpi_ec_write(fan_status_offset, s))
7154                         rc = -EIO;
7155                 else {
7156                         tp_features.fan_ctrl_status_undef = 0;
7157                         rc = 0;
7158                 }
7159                 break;
7160
7161         case TPACPI_FAN_WR_ACPI_SFAN:
7162                 rc = fan_get_status(&s);
7163                 if (rc < 0)
7164                         break;
7165
7166                 s &= 0x07;
7167
7168                 /* Set fan to at least level 4 */
7169                 s |= 4;
7170
7171                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7172                         rc = -EIO;
7173                 else
7174                         rc = 0;
7175                 break;
7176
7177         default:
7178                 rc = -ENXIO;
7179         }
7180
7181         mutex_unlock(&fan_mutex);
7182
7183         if (!rc)
7184                 vdbg_printk(TPACPI_DBG_FAN,
7185                         "fan control: set fan control register to 0x%02x\n",
7186                         s);
7187         return rc;
7188 }
7189
7190 static int fan_set_disable(void)
7191 {
7192         int rc;
7193
7194         if (!fan_control_allowed)
7195                 return -EPERM;
7196
7197         if (mutex_lock_killable(&fan_mutex))
7198                 return -ERESTARTSYS;
7199
7200         rc = 0;
7201         switch (fan_control_access_mode) {
7202         case TPACPI_FAN_WR_ACPI_FANS:
7203         case TPACPI_FAN_WR_TPEC:
7204                 if (!acpi_ec_write(fan_status_offset, 0x00))
7205                         rc = -EIO;
7206                 else {
7207                         fan_control_desired_level = 0;
7208                         tp_features.fan_ctrl_status_undef = 0;
7209                 }
7210                 break;
7211
7212         case TPACPI_FAN_WR_ACPI_SFAN:
7213                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7214                         rc = -EIO;
7215                 else
7216                         fan_control_desired_level = 0;
7217                 break;
7218
7219         default:
7220                 rc = -ENXIO;
7221         }
7222
7223         if (!rc)
7224                 vdbg_printk(TPACPI_DBG_FAN,
7225                         "fan control: set fan control register to 0\n");
7226
7227         mutex_unlock(&fan_mutex);
7228         return rc;
7229 }
7230
7231 static int fan_set_speed(int speed)
7232 {
7233         int rc;
7234
7235         if (!fan_control_allowed)
7236                 return -EPERM;
7237
7238         if (mutex_lock_killable(&fan_mutex))
7239                 return -ERESTARTSYS;
7240
7241         rc = 0;
7242         switch (fan_control_access_mode) {
7243         case TPACPI_FAN_WR_ACPI_FANS:
7244                 if (speed >= 0 && speed <= 65535) {
7245                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7246                                         speed, speed, speed))
7247                                 rc = -EIO;
7248                 } else
7249                         rc = -EINVAL;
7250                 break;
7251
7252         default:
7253                 rc = -ENXIO;
7254         }
7255
7256         mutex_unlock(&fan_mutex);
7257         return rc;
7258 }
7259
7260 static void fan_watchdog_reset(void)
7261 {
7262         static int fan_watchdog_active;
7263
7264         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7265                 return;
7266
7267         if (fan_watchdog_active)
7268                 cancel_delayed_work(&fan_watchdog_task);
7269
7270         if (fan_watchdog_maxinterval > 0 &&
7271             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7272                 fan_watchdog_active = 1;
7273                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7274                                 msecs_to_jiffies(fan_watchdog_maxinterval
7275                                                  * 1000))) {
7276                         printk(TPACPI_ERR
7277                                "failed to queue the fan watchdog, "
7278                                "watchdog will not trigger\n");
7279                 }
7280         } else
7281                 fan_watchdog_active = 0;
7282 }
7283
7284 static void fan_watchdog_fire(struct work_struct *ignored)
7285 {
7286         int rc;
7287
7288         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7289                 return;
7290
7291         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7292         rc = fan_set_enable();
7293         if (rc < 0) {
7294                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7295                         "will try again later...\n", -rc);
7296                 /* reschedule for later */
7297                 fan_watchdog_reset();
7298         }
7299 }
7300
7301 /*
7302  * SYSFS fan layout: hwmon compatible (device)
7303  *
7304  * pwm*_enable:
7305  *      0: "disengaged" mode
7306  *      1: manual mode
7307  *      2: native EC "auto" mode (recommended, hardware default)
7308  *
7309  * pwm*: set speed in manual mode, ignored otherwise.
7310  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7311  *      interpolation.
7312  *
7313  * fan*_input: tachometer reading, RPM
7314  *
7315  *
7316  * SYSFS fan layout: extensions
7317  *
7318  * fan_watchdog (driver):
7319  *      fan watchdog interval in seconds, 0 disables (default), max 120
7320  */
7321
7322 /* sysfs fan pwm1_enable ----------------------------------------------- */
7323 static ssize_t fan_pwm1_enable_show(struct device *dev,
7324                                     struct device_attribute *attr,
7325                                     char *buf)
7326 {
7327         int res, mode;
7328         u8 status;
7329
7330         res = fan_get_status_safe(&status);
7331         if (res)
7332                 return res;
7333
7334         if (status & TP_EC_FAN_FULLSPEED) {
7335                 mode = 0;
7336         } else if (status & TP_EC_FAN_AUTO) {
7337                 mode = 2;
7338         } else
7339                 mode = 1;
7340
7341         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7342 }
7343
7344 static ssize_t fan_pwm1_enable_store(struct device *dev,
7345                                      struct device_attribute *attr,
7346                                      const char *buf, size_t count)
7347 {
7348         unsigned long t;
7349         int res, level;
7350
7351         if (parse_strtoul(buf, 2, &t))
7352                 return -EINVAL;
7353
7354         tpacpi_disclose_usertask("hwmon pwm1_enable",
7355                         "set fan mode to %lu\n", t);
7356
7357         switch (t) {
7358         case 0:
7359                 level = TP_EC_FAN_FULLSPEED;
7360                 break;
7361         case 1:
7362                 level = TPACPI_FAN_LAST_LEVEL;
7363                 break;
7364         case 2:
7365                 level = TP_EC_FAN_AUTO;
7366                 break;
7367         case 3:
7368                 /* reserved for software-controlled auto mode */
7369                 return -ENOSYS;
7370         default:
7371                 return -EINVAL;
7372         }
7373
7374         res = fan_set_level_safe(level);
7375         if (res == -ENXIO)
7376                 return -EINVAL;
7377         else if (res < 0)
7378                 return res;
7379
7380         fan_watchdog_reset();
7381
7382         return count;
7383 }
7384
7385 static struct device_attribute dev_attr_fan_pwm1_enable =
7386         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7387                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7388
7389 /* sysfs fan pwm1 ------------------------------------------------------ */
7390 static ssize_t fan_pwm1_show(struct device *dev,
7391                              struct device_attribute *attr,
7392                              char *buf)
7393 {
7394         int res;
7395         u8 status;
7396
7397         res = fan_get_status_safe(&status);
7398         if (res)
7399                 return res;
7400
7401         if ((status &
7402              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7403                 status = fan_control_desired_level;
7404
7405         if (status > 7)
7406                 status = 7;
7407
7408         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7409 }
7410
7411 static ssize_t fan_pwm1_store(struct device *dev,
7412                               struct device_attribute *attr,
7413                               const char *buf, size_t count)
7414 {
7415         unsigned long s;
7416         int rc;
7417         u8 status, newlevel;
7418
7419         if (parse_strtoul(buf, 255, &s))
7420                 return -EINVAL;
7421
7422         tpacpi_disclose_usertask("hwmon pwm1",
7423                         "set fan speed to %lu\n", s);
7424
7425         /* scale down from 0-255 to 0-7 */
7426         newlevel = (s >> 5) & 0x07;
7427
7428         if (mutex_lock_killable(&fan_mutex))
7429                 return -ERESTARTSYS;
7430
7431         rc = fan_get_status(&status);
7432         if (!rc && (status &
7433                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7434                 rc = fan_set_level(newlevel);
7435                 if (rc == -ENXIO)
7436                         rc = -EINVAL;
7437                 else if (!rc) {
7438                         fan_update_desired_level(newlevel);
7439                         fan_watchdog_reset();
7440                 }
7441         }
7442
7443         mutex_unlock(&fan_mutex);
7444         return (rc)? rc : count;
7445 }
7446
7447 static struct device_attribute dev_attr_fan_pwm1 =
7448         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7449                 fan_pwm1_show, fan_pwm1_store);
7450
7451 /* sysfs fan fan1_input ------------------------------------------------ */
7452 static ssize_t fan_fan1_input_show(struct device *dev,
7453                            struct device_attribute *attr,
7454                            char *buf)
7455 {
7456         int res;
7457         unsigned int speed;
7458
7459         res = fan_get_speed(&speed);
7460         if (res < 0)
7461                 return res;
7462
7463         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7464 }
7465
7466 static struct device_attribute dev_attr_fan_fan1_input =
7467         __ATTR(fan1_input, S_IRUGO,
7468                 fan_fan1_input_show, NULL);
7469
7470 /* sysfs fan fan2_input ------------------------------------------------ */
7471 static ssize_t fan_fan2_input_show(struct device *dev,
7472                            struct device_attribute *attr,
7473                            char *buf)
7474 {
7475         int res;
7476         unsigned int speed;
7477
7478         res = fan2_get_speed(&speed);
7479         if (res < 0)
7480                 return res;
7481
7482         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7483 }
7484
7485 static struct device_attribute dev_attr_fan_fan2_input =
7486         __ATTR(fan2_input, S_IRUGO,
7487                 fan_fan2_input_show, NULL);
7488
7489 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7490 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7491                                      char *buf)
7492 {
7493         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7494 }
7495
7496 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7497                                       const char *buf, size_t count)
7498 {
7499         unsigned long t;
7500
7501         if (parse_strtoul(buf, 120, &t))
7502                 return -EINVAL;
7503
7504         if (!fan_control_allowed)
7505                 return -EPERM;
7506
7507         fan_watchdog_maxinterval = t;
7508         fan_watchdog_reset();
7509
7510         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7511
7512         return count;
7513 }
7514
7515 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7516                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7517
7518 /* --------------------------------------------------------------------- */
7519 static struct attribute *fan_attributes[] = {
7520         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7521         &dev_attr_fan_fan1_input.attr,
7522         NULL, /* for fan2_input */
7523         NULL
7524 };
7525
7526 static const struct attribute_group fan_attr_group = {
7527         .attrs = fan_attributes,
7528 };
7529
7530 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7531 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7532
7533 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7534         { .vendor = PCI_VENDOR_ID_IBM,          \
7535           .bios = TPACPI_MATCH_ANY,             \
7536           .ec = TPID(__id1, __id2),             \
7537           .quirks = __quirks }
7538
7539 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7540         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7541           .bios = TPACPI_MATCH_ANY,             \
7542           .ec = TPID(__id1, __id2),             \
7543           .quirks = __quirks }
7544
7545 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7546         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7547         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7548         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7549         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7550         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7551 };
7552
7553 #undef TPACPI_FAN_QL
7554 #undef TPACPI_FAN_QI
7555
7556 static int __init fan_init(struct ibm_init_struct *iibm)
7557 {
7558         int rc;
7559         unsigned long quirks;
7560
7561         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7562                         "initializing fan subdriver\n");
7563
7564         mutex_init(&fan_mutex);
7565         fan_status_access_mode = TPACPI_FAN_NONE;
7566         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7567         fan_control_commands = 0;
7568         fan_watchdog_maxinterval = 0;
7569         tp_features.fan_ctrl_status_undef = 0;
7570         tp_features.second_fan = 0;
7571         fan_control_desired_level = 7;
7572
7573         TPACPI_ACPIHANDLE_INIT(fans);
7574         TPACPI_ACPIHANDLE_INIT(gfan);
7575         TPACPI_ACPIHANDLE_INIT(sfan);
7576
7577         quirks = tpacpi_check_quirks(fan_quirk_table,
7578                                      ARRAY_SIZE(fan_quirk_table));
7579
7580         if (gfan_handle) {
7581                 /* 570, 600e/x, 770e, 770x */
7582                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7583         } else {
7584                 /* all other ThinkPads: note that even old-style
7585                  * ThinkPad ECs supports the fan control register */
7586                 if (likely(acpi_ec_read(fan_status_offset,
7587                                         &fan_control_initial_status))) {
7588                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7589                         if (quirks & TPACPI_FAN_Q1)
7590                                 fan_quirk1_setup();
7591                         if (quirks & TPACPI_FAN_2FAN) {
7592                                 tp_features.second_fan = 1;
7593                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7594                                         "secondary fan support enabled\n");
7595                         }
7596                 } else {
7597                         printk(TPACPI_ERR
7598                                "ThinkPad ACPI EC access misbehaving, "
7599                                "fan status and control unavailable\n");
7600                         return 1;
7601                 }
7602         }
7603
7604         if (sfan_handle) {
7605                 /* 570, 770x-JL */
7606                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7607                 fan_control_commands |=
7608                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7609         } else {
7610                 if (!gfan_handle) {
7611                         /* gfan without sfan means no fan control */
7612                         /* all other models implement TP EC 0x2f control */
7613
7614                         if (fans_handle) {
7615                                 /* X31, X40, X41 */
7616                                 fan_control_access_mode =
7617                                     TPACPI_FAN_WR_ACPI_FANS;
7618                                 fan_control_commands |=
7619                                     TPACPI_FAN_CMD_SPEED |
7620                                     TPACPI_FAN_CMD_LEVEL |
7621                                     TPACPI_FAN_CMD_ENABLE;
7622                         } else {
7623                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7624                                 fan_control_commands |=
7625                                     TPACPI_FAN_CMD_LEVEL |
7626                                     TPACPI_FAN_CMD_ENABLE;
7627                         }
7628                 }
7629         }
7630
7631         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7632                 "fan is %s, modes %d, %d\n",
7633                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7634                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7635                 fan_status_access_mode, fan_control_access_mode);
7636
7637         /* fan control master switch */
7638         if (!fan_control_allowed) {
7639                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7640                 fan_control_commands = 0;
7641                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7642                            "fan control features disabled by parameter\n");
7643         }
7644
7645         /* update fan_control_desired_level */
7646         if (fan_status_access_mode != TPACPI_FAN_NONE)
7647                 fan_get_status_safe(NULL);
7648
7649         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7650             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7651                 if (tp_features.second_fan) {
7652                         /* attach second fan tachometer */
7653                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7654                                         &dev_attr_fan_fan2_input.attr;
7655                 }
7656                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7657                                          &fan_attr_group);
7658                 if (rc < 0)
7659                         return rc;
7660
7661                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7662                                         &driver_attr_fan_watchdog);
7663                 if (rc < 0) {
7664                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7665                                         &fan_attr_group);
7666                         return rc;
7667                 }
7668                 return 0;
7669         } else
7670                 return 1;
7671 }
7672
7673 static void fan_exit(void)
7674 {
7675         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7676                     "cancelling any pending fan watchdog tasks\n");
7677
7678         /* FIXME: can we really do this unconditionally? */
7679         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7680         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7681                            &driver_attr_fan_watchdog);
7682
7683         cancel_delayed_work(&fan_watchdog_task);
7684         flush_workqueue(tpacpi_wq);
7685 }
7686
7687 static void fan_suspend(pm_message_t state)
7688 {
7689         int rc;
7690
7691         if (!fan_control_allowed)
7692                 return;
7693
7694         /* Store fan status in cache */
7695         fan_control_resume_level = 0;
7696         rc = fan_get_status_safe(&fan_control_resume_level);
7697         if (rc < 0)
7698                 printk(TPACPI_NOTICE
7699                         "failed to read fan level for later "
7700                         "restore during resume: %d\n", rc);
7701
7702         /* if it is undefined, don't attempt to restore it.
7703          * KEEP THIS LAST */
7704         if (tp_features.fan_ctrl_status_undef)
7705                 fan_control_resume_level = 0;
7706 }
7707
7708 static void fan_resume(void)
7709 {
7710         u8 current_level = 7;
7711         bool do_set = false;
7712         int rc;
7713
7714         /* DSDT *always* updates status on resume */
7715         tp_features.fan_ctrl_status_undef = 0;
7716
7717         if (!fan_control_allowed ||
7718             !fan_control_resume_level ||
7719             (fan_get_status_safe(&current_level) < 0))
7720                 return;
7721
7722         switch (fan_control_access_mode) {
7723         case TPACPI_FAN_WR_ACPI_SFAN:
7724                 /* never decrease fan level */
7725                 do_set = (fan_control_resume_level > current_level);
7726                 break;
7727         case TPACPI_FAN_WR_ACPI_FANS:
7728         case TPACPI_FAN_WR_TPEC:
7729                 /* never decrease fan level, scale is:
7730                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7731                  *
7732                  * We expect the firmware to set either 7 or AUTO, but we
7733                  * handle FULLSPEED out of paranoia.
7734                  *
7735                  * So, we can safely only restore FULLSPEED or 7, anything
7736                  * else could slow the fan.  Restoring AUTO is useless, at
7737                  * best that's exactly what the DSDT already set (it is the
7738                  * slower it uses).
7739                  *
7740                  * Always keep in mind that the DSDT *will* have set the
7741                  * fans to what the vendor supposes is the best level.  We
7742                  * muck with it only to speed the fan up.
7743                  */
7744                 if (fan_control_resume_level != 7 &&
7745                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7746                         return;
7747                 else
7748                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7749                                  (current_level != fan_control_resume_level);
7750                 break;
7751         default:
7752                 return;
7753         }
7754         if (do_set) {
7755                 printk(TPACPI_NOTICE
7756                         "restoring fan level to 0x%02x\n",
7757                         fan_control_resume_level);
7758                 rc = fan_set_level_safe(fan_control_resume_level);
7759                 if (rc < 0)
7760                         printk(TPACPI_NOTICE
7761                                 "failed to restore fan level: %d\n", rc);
7762         }
7763 }
7764
7765 static int fan_read(char *p)
7766 {
7767         int len = 0;
7768         int rc;
7769         u8 status;
7770         unsigned int speed = 0;
7771
7772         switch (fan_status_access_mode) {
7773         case TPACPI_FAN_RD_ACPI_GFAN:
7774                 /* 570, 600e/x, 770e, 770x */
7775                 rc = fan_get_status_safe(&status);
7776                 if (rc < 0)
7777                         return rc;
7778
7779                 len += sprintf(p + len, "status:\t\t%s\n"
7780                                "level:\t\t%d\n",
7781                                (status != 0) ? "enabled" : "disabled", status);
7782                 break;
7783
7784         case TPACPI_FAN_RD_TPEC:
7785                 /* all except 570, 600e/x, 770e, 770x */
7786                 rc = fan_get_status_safe(&status);
7787                 if (rc < 0)
7788                         return rc;
7789
7790                 len += sprintf(p + len, "status:\t\t%s\n",
7791                                (status != 0) ? "enabled" : "disabled");
7792
7793                 rc = fan_get_speed(&speed);
7794                 if (rc < 0)
7795                         return rc;
7796
7797                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7798
7799                 if (status & TP_EC_FAN_FULLSPEED)
7800                         /* Disengaged mode takes precedence */
7801                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7802                 else if (status & TP_EC_FAN_AUTO)
7803                         len += sprintf(p + len, "level:\t\tauto\n");
7804                 else
7805                         len += sprintf(p + len, "level:\t\t%d\n", status);
7806                 break;
7807
7808         case TPACPI_FAN_NONE:
7809         default:
7810                 len += sprintf(p + len, "status:\t\tnot supported\n");
7811         }
7812
7813         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7814                 len += sprintf(p + len, "commands:\tlevel <level>");
7815
7816                 switch (fan_control_access_mode) {
7817                 case TPACPI_FAN_WR_ACPI_SFAN:
7818                         len += sprintf(p + len, " (<level> is 0-7)\n");
7819                         break;
7820
7821                 default:
7822                         len += sprintf(p + len, " (<level> is 0-7, "
7823                                        "auto, disengaged, full-speed)\n");
7824                         break;
7825                 }
7826         }
7827
7828         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7829                 len += sprintf(p + len, "commands:\tenable, disable\n"
7830                                "commands:\twatchdog <timeout> (<timeout> "
7831                                "is 0 (off), 1-120 (seconds))\n");
7832
7833         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7834                 len += sprintf(p + len, "commands:\tspeed <speed>"
7835                                " (<speed> is 0-65535)\n");
7836
7837         return len;
7838 }
7839
7840 static int fan_write_cmd_level(const char *cmd, int *rc)
7841 {
7842         int level;
7843
7844         if (strlencmp(cmd, "level auto") == 0)
7845                 level = TP_EC_FAN_AUTO;
7846         else if ((strlencmp(cmd, "level disengaged") == 0) |
7847                         (strlencmp(cmd, "level full-speed") == 0))
7848                 level = TP_EC_FAN_FULLSPEED;
7849         else if (sscanf(cmd, "level %d", &level) != 1)
7850                 return 0;
7851
7852         *rc = fan_set_level_safe(level);
7853         if (*rc == -ENXIO)
7854                 printk(TPACPI_ERR "level command accepted for unsupported "
7855                        "access mode %d", fan_control_access_mode);
7856         else if (!*rc)
7857                 tpacpi_disclose_usertask("procfs fan",
7858                         "set level to %d\n", level);
7859
7860         return 1;
7861 }
7862
7863 static int fan_write_cmd_enable(const char *cmd, int *rc)
7864 {
7865         if (strlencmp(cmd, "enable") != 0)
7866                 return 0;
7867
7868         *rc = fan_set_enable();
7869         if (*rc == -ENXIO)
7870                 printk(TPACPI_ERR "enable command accepted for unsupported "
7871                        "access mode %d", fan_control_access_mode);
7872         else if (!*rc)
7873                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7874
7875         return 1;
7876 }
7877
7878 static int fan_write_cmd_disable(const char *cmd, int *rc)
7879 {
7880         if (strlencmp(cmd, "disable") != 0)
7881                 return 0;
7882
7883         *rc = fan_set_disable();
7884         if (*rc == -ENXIO)
7885                 printk(TPACPI_ERR "disable command accepted for unsupported "
7886                        "access mode %d", fan_control_access_mode);
7887         else if (!*rc)
7888                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7889
7890         return 1;
7891 }
7892
7893 static int fan_write_cmd_speed(const char *cmd, int *rc)
7894 {
7895         int speed;
7896
7897         /* TODO:
7898          * Support speed <low> <medium> <high> ? */
7899
7900         if (sscanf(cmd, "speed %d", &speed) != 1)
7901                 return 0;
7902
7903         *rc = fan_set_speed(speed);
7904         if (*rc == -ENXIO)
7905                 printk(TPACPI_ERR "speed command accepted for unsupported "
7906                        "access mode %d", fan_control_access_mode);
7907         else if (!*rc)
7908                 tpacpi_disclose_usertask("procfs fan",
7909                         "set speed to %d\n", speed);
7910
7911         return 1;
7912 }
7913
7914 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7915 {
7916         int interval;
7917
7918         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7919                 return 0;
7920
7921         if (interval < 0 || interval > 120)
7922                 *rc = -EINVAL;
7923         else {
7924                 fan_watchdog_maxinterval = interval;
7925                 tpacpi_disclose_usertask("procfs fan",
7926                         "set watchdog timer to %d\n",
7927                         interval);
7928         }
7929
7930         return 1;
7931 }
7932
7933 static int fan_write(char *buf)
7934 {
7935         char *cmd;
7936         int rc = 0;
7937
7938         while (!rc && (cmd = next_cmd(&buf))) {
7939                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7940                       fan_write_cmd_level(cmd, &rc)) &&
7941                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7942                       (fan_write_cmd_enable(cmd, &rc) ||
7943                        fan_write_cmd_disable(cmd, &rc) ||
7944                        fan_write_cmd_watchdog(cmd, &rc))) &&
7945                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7946                       fan_write_cmd_speed(cmd, &rc))
7947                     )
7948                         rc = -EINVAL;
7949                 else if (!rc)
7950                         fan_watchdog_reset();
7951         }
7952
7953         return rc;
7954 }
7955
7956 static struct ibm_struct fan_driver_data = {
7957         .name = "fan",
7958         .read = fan_read,
7959         .write = fan_write,
7960         .exit = fan_exit,
7961         .suspend = fan_suspend,
7962         .resume = fan_resume,
7963 };
7964
7965 /****************************************************************************
7966  ****************************************************************************
7967  *
7968  * Infrastructure
7969  *
7970  ****************************************************************************
7971  ****************************************************************************/
7972
7973 /*
7974  * HKEY event callout for other subdrivers go here
7975  * (yes, it is ugly, but it is quick, safe, and gets the job done
7976  */
7977 static void tpacpi_driver_event(const unsigned int hkey_event)
7978 {
7979         if (ibm_backlight_device) {
7980                 switch (hkey_event) {
7981                 case TP_HKEY_EV_BRGHT_UP:
7982                 case TP_HKEY_EV_BRGHT_DOWN:
7983                         tpacpi_brightness_notify_change();
7984                 }
7985         }
7986 }
7987
7988
7989
7990 static void hotkey_driver_event(const unsigned int scancode)
7991 {
7992         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
7993 }
7994
7995 /* sysfs name ---------------------------------------------------------- */
7996 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7997                            struct device_attribute *attr,
7998                            char *buf)
7999 {
8000         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8001 }
8002
8003 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8004         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8005
8006 /* --------------------------------------------------------------------- */
8007
8008 /* /proc support */
8009 static struct proc_dir_entry *proc_dir;
8010
8011 /*
8012  * Module and infrastructure proble, init and exit handling
8013  */
8014
8015 static int force_load;
8016
8017 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8018 static const char * __init str_supported(int is_supported)
8019 {
8020         static char text_unsupported[] __initdata = "not supported";
8021
8022         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8023 }
8024 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8025
8026 static void ibm_exit(struct ibm_struct *ibm)
8027 {
8028         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8029
8030         list_del_init(&ibm->all_drivers);
8031
8032         if (ibm->flags.acpi_notify_installed) {
8033                 dbg_printk(TPACPI_DBG_EXIT,
8034                         "%s: acpi_remove_notify_handler\n", ibm->name);
8035                 BUG_ON(!ibm->acpi);
8036                 acpi_remove_notify_handler(*ibm->acpi->handle,
8037                                            ibm->acpi->type,
8038                                            dispatch_acpi_notify);
8039                 ibm->flags.acpi_notify_installed = 0;
8040                 ibm->flags.acpi_notify_installed = 0;
8041         }
8042
8043         if (ibm->flags.proc_created) {
8044                 dbg_printk(TPACPI_DBG_EXIT,
8045                         "%s: remove_proc_entry\n", ibm->name);
8046                 remove_proc_entry(ibm->name, proc_dir);
8047                 ibm->flags.proc_created = 0;
8048         }
8049
8050         if (ibm->flags.acpi_driver_registered) {
8051                 dbg_printk(TPACPI_DBG_EXIT,
8052                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8053                 BUG_ON(!ibm->acpi);
8054                 acpi_bus_unregister_driver(ibm->acpi->driver);
8055                 kfree(ibm->acpi->driver);
8056                 ibm->acpi->driver = NULL;
8057                 ibm->flags.acpi_driver_registered = 0;
8058         }
8059
8060         if (ibm->flags.init_called && ibm->exit) {
8061                 ibm->exit();
8062                 ibm->flags.init_called = 0;
8063         }
8064
8065         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8066 }
8067
8068 static int __init ibm_init(struct ibm_init_struct *iibm)
8069 {
8070         int ret;
8071         struct ibm_struct *ibm = iibm->data;
8072         struct proc_dir_entry *entry;
8073
8074         BUG_ON(ibm == NULL);
8075
8076         INIT_LIST_HEAD(&ibm->all_drivers);
8077
8078         if (ibm->flags.experimental && !experimental)
8079                 return 0;
8080
8081         dbg_printk(TPACPI_DBG_INIT,
8082                 "probing for %s\n", ibm->name);
8083
8084         if (iibm->init) {
8085                 ret = iibm->init(iibm);
8086                 if (ret > 0)
8087                         return 0;       /* probe failed */
8088                 if (ret)
8089                         return ret;
8090
8091                 ibm->flags.init_called = 1;
8092         }
8093
8094         if (ibm->acpi) {
8095                 if (ibm->acpi->hid) {
8096                         ret = register_tpacpi_subdriver(ibm);
8097                         if (ret)
8098                                 goto err_out;
8099                 }
8100
8101                 if (ibm->acpi->notify) {
8102                         ret = setup_acpi_notify(ibm);
8103                         if (ret == -ENODEV) {
8104                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8105                                         ibm->name);
8106                                 ret = 0;
8107                                 goto err_out;
8108                         }
8109                         if (ret < 0)
8110                                 goto err_out;
8111                 }
8112         }
8113
8114         dbg_printk(TPACPI_DBG_INIT,
8115                 "%s installed\n", ibm->name);
8116
8117         if (ibm->read) {
8118                 entry = create_proc_entry(ibm->name,
8119                                           S_IFREG | S_IRUGO | S_IWUSR,
8120                                           proc_dir);
8121                 if (!entry) {
8122                         printk(TPACPI_ERR "unable to create proc entry %s\n",
8123                                ibm->name);
8124                         ret = -ENODEV;
8125                         goto err_out;
8126                 }
8127                 entry->data = ibm;
8128                 entry->read_proc = &dispatch_procfs_read;
8129                 if (ibm->write)
8130                         entry->write_proc = &dispatch_procfs_write;
8131                 ibm->flags.proc_created = 1;
8132         }
8133
8134         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8135
8136         return 0;
8137
8138 err_out:
8139         dbg_printk(TPACPI_DBG_INIT,
8140                 "%s: at error exit path with result %d\n",
8141                 ibm->name, ret);
8142
8143         ibm_exit(ibm);
8144         return (ret < 0)? ret : 0;
8145 }
8146
8147 /* Probing */
8148
8149 static bool __pure __init tpacpi_is_fw_digit(const char c)
8150 {
8151         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8152 }
8153
8154 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8155 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8156                                                 const char t)
8157 {
8158         return s && strlen(s) >= 8 &&
8159                 tpacpi_is_fw_digit(s[0]) &&
8160                 tpacpi_is_fw_digit(s[1]) &&
8161                 s[2] == t && s[3] == 'T' &&
8162                 tpacpi_is_fw_digit(s[4]) &&
8163                 tpacpi_is_fw_digit(s[5]) &&
8164                 s[6] == 'W' && s[7] == 'W';
8165 }
8166
8167 /* returns 0 - probe ok, or < 0 - probe error.
8168  * Probe ok doesn't mean thinkpad found.
8169  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8170 static int __must_check __init get_thinkpad_model_data(
8171                                                 struct thinkpad_id_data *tp)
8172 {
8173         const struct dmi_device *dev = NULL;
8174         char ec_fw_string[18];
8175         char const *s;
8176
8177         if (!tp)
8178                 return -EINVAL;
8179
8180         memset(tp, 0, sizeof(*tp));
8181
8182         if (dmi_name_in_vendors("IBM"))
8183                 tp->vendor = PCI_VENDOR_ID_IBM;
8184         else if (dmi_name_in_vendors("LENOVO"))
8185                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8186         else
8187                 return 0;
8188
8189         s = dmi_get_system_info(DMI_BIOS_VERSION);
8190         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8191         if (s && !tp->bios_version_str)
8192                 return -ENOMEM;
8193
8194         /* Really ancient ThinkPad 240X will fail this, which is fine */
8195         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8196                 return 0;
8197
8198         tp->bios_model = tp->bios_version_str[0]
8199                          | (tp->bios_version_str[1] << 8);
8200         tp->bios_release = (tp->bios_version_str[4] << 8)
8201                          | tp->bios_version_str[5];
8202
8203         /*
8204          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8205          * X32 or newer, all Z series;  Some models must have an
8206          * up-to-date BIOS or they will not be detected.
8207          *
8208          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8209          */
8210         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8211                 if (sscanf(dev->name,
8212                            "IBM ThinkPad Embedded Controller -[%17c",
8213                            ec_fw_string) == 1) {
8214                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8215                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8216
8217                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8218                         if (!tp->ec_version_str)
8219                                 return -ENOMEM;
8220
8221                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8222                                 tp->ec_model = ec_fw_string[0]
8223                                                 | (ec_fw_string[1] << 8);
8224                                 tp->ec_release = (ec_fw_string[4] << 8)
8225                                                 | ec_fw_string[5];
8226                         } else {
8227                                 printk(TPACPI_NOTICE
8228                                         "ThinkPad firmware release %s "
8229                                         "doesn't match the known patterns\n",
8230                                         ec_fw_string);
8231                                 printk(TPACPI_NOTICE
8232                                         "please report this to %s\n",
8233                                         TPACPI_MAIL);
8234                         }
8235                         break;
8236                 }
8237         }
8238
8239         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8240         if (s && !strnicmp(s, "ThinkPad", 8)) {
8241                 tp->model_str = kstrdup(s, GFP_KERNEL);
8242                 if (!tp->model_str)
8243                         return -ENOMEM;
8244         }
8245
8246         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8247         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8248         if (s && !tp->nummodel_str)
8249                 return -ENOMEM;
8250
8251         return 0;
8252 }
8253
8254 static int __init probe_for_thinkpad(void)
8255 {
8256         int is_thinkpad;
8257
8258         if (acpi_disabled)
8259                 return -ENODEV;
8260
8261         /*
8262          * Non-ancient models have better DMI tagging, but very old models
8263          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8264          */
8265         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8266                       (thinkpad_id.ec_model != 0) ||
8267                       tpacpi_is_fw_known();
8268
8269         /* ec is required because many other handles are relative to it */
8270         TPACPI_ACPIHANDLE_INIT(ec);
8271         if (!ec_handle) {
8272                 if (is_thinkpad)
8273                         printk(TPACPI_ERR
8274                                 "Not yet supported ThinkPad detected!\n");
8275                 return -ENODEV;
8276         }
8277
8278         if (!is_thinkpad && !force_load)
8279                 return -ENODEV;
8280
8281         return 0;
8282 }
8283
8284
8285 /* Module init, exit, parameters */
8286
8287 static struct ibm_init_struct ibms_init[] __initdata = {
8288         {
8289                 .init = thinkpad_acpi_driver_init,
8290                 .data = &thinkpad_acpi_driver_data,
8291         },
8292         {
8293                 .init = hotkey_init,
8294                 .data = &hotkey_driver_data,
8295         },
8296         {
8297                 .init = bluetooth_init,
8298                 .data = &bluetooth_driver_data,
8299         },
8300         {
8301                 .init = wan_init,
8302                 .data = &wan_driver_data,
8303         },
8304         {
8305                 .init = uwb_init,
8306                 .data = &uwb_driver_data,
8307         },
8308 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8309         {
8310                 .init = video_init,
8311                 .data = &video_driver_data,
8312         },
8313 #endif
8314         {
8315                 .init = light_init,
8316                 .data = &light_driver_data,
8317         },
8318         {
8319                 .init = cmos_init,
8320                 .data = &cmos_driver_data,
8321         },
8322         {
8323                 .init = led_init,
8324                 .data = &led_driver_data,
8325         },
8326         {
8327                 .init = beep_init,
8328                 .data = &beep_driver_data,
8329         },
8330         {
8331                 .init = thermal_init,
8332                 .data = &thermal_driver_data,
8333         },
8334         {
8335                 .data = &ecdump_driver_data,
8336         },
8337         {
8338                 .init = brightness_init,
8339                 .data = &brightness_driver_data,
8340         },
8341         {
8342                 .init = volume_init,
8343                 .data = &volume_driver_data,
8344         },
8345         {
8346                 .init = fan_init,
8347                 .data = &fan_driver_data,
8348         },
8349 };
8350
8351 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8352 {
8353         unsigned int i;
8354         struct ibm_struct *ibm;
8355
8356         if (!kp || !kp->name || !val)
8357                 return -EINVAL;
8358
8359         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8360                 ibm = ibms_init[i].data;
8361                 WARN_ON(ibm == NULL);
8362
8363                 if (!ibm || !ibm->name)
8364                         continue;
8365
8366                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8367                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8368                                 return -ENOSPC;
8369                         strcpy(ibms_init[i].param, val);
8370                         strcat(ibms_init[i].param, ",");
8371                         return 0;
8372                 }
8373         }
8374
8375         return -EINVAL;
8376 }
8377
8378 module_param(experimental, int, 0444);
8379 MODULE_PARM_DESC(experimental,
8380                  "Enables experimental features when non-zero");
8381
8382 module_param_named(debug, dbg_level, uint, 0);
8383 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8384
8385 module_param(force_load, bool, 0444);
8386 MODULE_PARM_DESC(force_load,
8387                  "Attempts to load the driver even on a "
8388                  "mis-identified ThinkPad when true");
8389
8390 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8391 MODULE_PARM_DESC(fan_control,
8392                  "Enables setting fan parameters features when true");
8393
8394 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8395 MODULE_PARM_DESC(brightness_mode,
8396                  "Selects brightness control strategy: "
8397                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8398
8399 module_param(brightness_enable, uint, 0444);
8400 MODULE_PARM_DESC(brightness_enable,
8401                  "Enables backlight control when 1, disables when 0");
8402
8403 module_param(hotkey_report_mode, uint, 0444);
8404 MODULE_PARM_DESC(hotkey_report_mode,
8405                  "used for backwards compatibility with userspace, "
8406                  "see documentation");
8407
8408 module_param_named(volume_mode, volume_mode, uint, 0444);
8409 MODULE_PARM_DESC(volume_mode,
8410                  "Selects volume control strategy: "
8411                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8412
8413 #define TPACPI_PARAM(feature) \
8414         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8415         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8416                          "at module load, see documentation")
8417
8418 TPACPI_PARAM(hotkey);
8419 TPACPI_PARAM(bluetooth);
8420 TPACPI_PARAM(video);
8421 TPACPI_PARAM(light);
8422 TPACPI_PARAM(cmos);
8423 TPACPI_PARAM(led);
8424 TPACPI_PARAM(beep);
8425 TPACPI_PARAM(ecdump);
8426 TPACPI_PARAM(brightness);
8427 TPACPI_PARAM(volume);
8428 TPACPI_PARAM(fan);
8429
8430 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8431 module_param(dbg_wlswemul, uint, 0444);
8432 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8433 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8434 MODULE_PARM_DESC(wlsw_state,
8435                  "Initial state of the emulated WLSW switch");
8436
8437 module_param(dbg_bluetoothemul, uint, 0444);
8438 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8439 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8440 MODULE_PARM_DESC(bluetooth_state,
8441                  "Initial state of the emulated bluetooth switch");
8442
8443 module_param(dbg_wwanemul, uint, 0444);
8444 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8445 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8446 MODULE_PARM_DESC(wwan_state,
8447                  "Initial state of the emulated WWAN switch");
8448
8449 module_param(dbg_uwbemul, uint, 0444);
8450 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8451 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8452 MODULE_PARM_DESC(uwb_state,
8453                  "Initial state of the emulated UWB switch");
8454 #endif
8455
8456 static void thinkpad_acpi_module_exit(void)
8457 {
8458         struct ibm_struct *ibm, *itmp;
8459
8460         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8461
8462         list_for_each_entry_safe_reverse(ibm, itmp,
8463                                          &tpacpi_all_drivers,
8464                                          all_drivers) {
8465                 ibm_exit(ibm);
8466         }
8467
8468         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8469
8470         if (tpacpi_inputdev) {
8471                 if (tp_features.input_device_registered)
8472                         input_unregister_device(tpacpi_inputdev);
8473                 else
8474                         input_free_device(tpacpi_inputdev);
8475         }
8476
8477         if (tpacpi_hwmon)
8478                 hwmon_device_unregister(tpacpi_hwmon);
8479
8480         if (tp_features.sensors_pdev_attrs_registered)
8481                 device_remove_file(&tpacpi_sensors_pdev->dev,
8482                                    &dev_attr_thinkpad_acpi_pdev_name);
8483         if (tpacpi_sensors_pdev)
8484                 platform_device_unregister(tpacpi_sensors_pdev);
8485         if (tpacpi_pdev)
8486                 platform_device_unregister(tpacpi_pdev);
8487
8488         if (tp_features.sensors_pdrv_attrs_registered)
8489                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8490         if (tp_features.platform_drv_attrs_registered)
8491                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8492
8493         if (tp_features.sensors_pdrv_registered)
8494                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8495
8496         if (tp_features.platform_drv_registered)
8497                 platform_driver_unregister(&tpacpi_pdriver);
8498
8499         if (proc_dir)
8500                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8501
8502         if (tpacpi_wq)
8503                 destroy_workqueue(tpacpi_wq);
8504
8505         kfree(thinkpad_id.bios_version_str);
8506         kfree(thinkpad_id.ec_version_str);
8507         kfree(thinkpad_id.model_str);
8508 }
8509
8510
8511 static int __init thinkpad_acpi_module_init(void)
8512 {
8513         int ret, i;
8514
8515         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8516
8517         /* Parameter checking */
8518         if (hotkey_report_mode > 2)
8519                 return -EINVAL;
8520
8521         /* Driver-level probe */
8522
8523         ret = get_thinkpad_model_data(&thinkpad_id);
8524         if (ret) {
8525                 printk(TPACPI_ERR
8526                         "unable to get DMI data: %d\n", ret);
8527                 thinkpad_acpi_module_exit();
8528                 return ret;
8529         }
8530         ret = probe_for_thinkpad();
8531         if (ret) {
8532                 thinkpad_acpi_module_exit();
8533                 return ret;
8534         }
8535
8536         /* Driver initialization */
8537
8538         TPACPI_ACPIHANDLE_INIT(ecrd);
8539         TPACPI_ACPIHANDLE_INIT(ecwr);
8540
8541         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8542         if (!tpacpi_wq) {
8543                 thinkpad_acpi_module_exit();
8544                 return -ENOMEM;
8545         }
8546
8547         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8548         if (!proc_dir) {
8549                 printk(TPACPI_ERR
8550                        "unable to create proc dir " TPACPI_PROC_DIR);
8551                 thinkpad_acpi_module_exit();
8552                 return -ENODEV;
8553         }
8554
8555         ret = platform_driver_register(&tpacpi_pdriver);
8556         if (ret) {
8557                 printk(TPACPI_ERR
8558                        "unable to register main platform driver\n");
8559                 thinkpad_acpi_module_exit();
8560                 return ret;
8561         }
8562         tp_features.platform_drv_registered = 1;
8563
8564         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8565         if (ret) {
8566                 printk(TPACPI_ERR
8567                        "unable to register hwmon platform driver\n");
8568                 thinkpad_acpi_module_exit();
8569                 return ret;
8570         }
8571         tp_features.sensors_pdrv_registered = 1;
8572
8573         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8574         if (!ret) {
8575                 tp_features.platform_drv_attrs_registered = 1;
8576                 ret = tpacpi_create_driver_attributes(
8577                                         &tpacpi_hwmon_pdriver.driver);
8578         }
8579         if (ret) {
8580                 printk(TPACPI_ERR
8581                        "unable to create sysfs driver attributes\n");
8582                 thinkpad_acpi_module_exit();
8583                 return ret;
8584         }
8585         tp_features.sensors_pdrv_attrs_registered = 1;
8586
8587
8588         /* Device initialization */
8589         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8590                                                         NULL, 0);
8591         if (IS_ERR(tpacpi_pdev)) {
8592                 ret = PTR_ERR(tpacpi_pdev);
8593                 tpacpi_pdev = NULL;
8594                 printk(TPACPI_ERR "unable to register platform device\n");
8595                 thinkpad_acpi_module_exit();
8596                 return ret;
8597         }
8598         tpacpi_sensors_pdev = platform_device_register_simple(
8599                                                 TPACPI_HWMON_DRVR_NAME,
8600                                                 -1, NULL, 0);
8601         if (IS_ERR(tpacpi_sensors_pdev)) {
8602                 ret = PTR_ERR(tpacpi_sensors_pdev);
8603                 tpacpi_sensors_pdev = NULL;
8604                 printk(TPACPI_ERR
8605                        "unable to register hwmon platform device\n");
8606                 thinkpad_acpi_module_exit();
8607                 return ret;
8608         }
8609         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8610                                  &dev_attr_thinkpad_acpi_pdev_name);
8611         if (ret) {
8612                 printk(TPACPI_ERR
8613                        "unable to create sysfs hwmon device attributes\n");
8614                 thinkpad_acpi_module_exit();
8615                 return ret;
8616         }
8617         tp_features.sensors_pdev_attrs_registered = 1;
8618         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8619         if (IS_ERR(tpacpi_hwmon)) {
8620                 ret = PTR_ERR(tpacpi_hwmon);
8621                 tpacpi_hwmon = NULL;
8622                 printk(TPACPI_ERR "unable to register hwmon device\n");
8623                 thinkpad_acpi_module_exit();
8624                 return ret;
8625         }
8626         mutex_init(&tpacpi_inputdev_send_mutex);
8627         tpacpi_inputdev = input_allocate_device();
8628         if (!tpacpi_inputdev) {
8629                 printk(TPACPI_ERR "unable to allocate input device\n");
8630                 thinkpad_acpi_module_exit();
8631                 return -ENOMEM;
8632         } else {
8633                 /* Prepare input device, but don't register */
8634                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8635                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8636                 tpacpi_inputdev->id.bustype = BUS_HOST;
8637                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8638                                                 thinkpad_id.vendor :
8639                                                 PCI_VENDOR_ID_IBM;
8640                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8641                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8642                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8643         }
8644         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8645                 ret = ibm_init(&ibms_init[i]);
8646                 if (ret >= 0 && *ibms_init[i].param)
8647                         ret = ibms_init[i].data->write(ibms_init[i].param);
8648                 if (ret < 0) {
8649                         thinkpad_acpi_module_exit();
8650                         return ret;
8651                 }
8652         }
8653         ret = input_register_device(tpacpi_inputdev);
8654         if (ret < 0) {
8655                 printk(TPACPI_ERR "unable to register input device\n");
8656                 thinkpad_acpi_module_exit();
8657                 return ret;
8658         } else {
8659                 tp_features.input_device_registered = 1;
8660         }
8661
8662         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8663         return 0;
8664 }
8665
8666 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8667
8668 /*
8669  * This will autoload the driver in almost every ThinkPad
8670  * in widespread use.
8671  *
8672  * Only _VERY_ old models, like the 240, 240x and 570 lack
8673  * the HKEY event interface.
8674  */
8675 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8676
8677 /*
8678  * DMI matching for module autoloading
8679  *
8680  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8681  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8682  *
8683  * Only models listed in thinkwiki will be supported, so add yours
8684  * if it is not there yet.
8685  */
8686 #define IBM_BIOS_MODULE_ALIAS(__type) \
8687         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8688
8689 /* Ancient thinkpad BIOSes have to be identified by
8690  * BIOS type or model number, and there are far less
8691  * BIOS types than model numbers... */
8692 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8693
8694 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8695 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8696 MODULE_DESCRIPTION(TPACPI_DESC);
8697 MODULE_VERSION(TPACPI_VERSION);
8698 MODULE_LICENSE("GPL");
8699
8700 module_init(thinkpad_acpi_module_init);
8701 module_exit(thinkpad_acpi_module_exit);