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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 0x020700
  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 mixer_no_level_control:1;
 303         u32 input_device_registered:1;
 304         u32 platform_drv_registered:1;
 305         u32 platform_drv_attrs_registered:1;
 306         u32 sensors_pdrv_registered:1;
 307         u32 sensors_pdrv_attrs_registered:1;
 308         u32 sensors_pdev_attrs_registered:1;
 309         u32 hotkey_poll_active:1;
 310 } tp_features;
 311
 312 static struct {
 313         u16 hotkey_mask_ff:1;
 314         u16 volume_ctrl_forbidden:1;
 315 } tp_warned;
 316
 317 struct thinkpad_id_data {
 318         unsigned int vendor;    /* ThinkPad vendor:
 319                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 320
 321         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 322         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 323
 324         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 325         u16 ec_model;
 326         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 327         u16 ec_release;
 328
 329         char *model_str;        /* ThinkPad T43 */
 330         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 331 };
 332 static struct thinkpad_id_data thinkpad_id;
 333
 334 static enum {
 335         TPACPI_LIFE_INIT = 0,
 336         TPACPI_LIFE_RUNNING,
 337         TPACPI_LIFE_EXITING,
 338 } tpacpi_lifecycle;
 339
 340 static int experimental;
 341 static u32 dbg_level;
 342
 343 static struct workqueue_struct *tpacpi_wq;
 344
 345 enum led_status_t {
 346         TPACPI_LED_OFF = 0,
 347         TPACPI_LED_ON,
 348         TPACPI_LED_BLINK,
 349 };
 350
 351 /* Special LED class that can defer work */
 352 struct tpacpi_led_classdev {
 353         struct led_classdev led_classdev;
 354         struct work_struct work;
 355         enum led_status_t new_state;
 356         unsigned int led;
 357 };
 358
 359 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 360 static int dbg_wlswemul;
 361 static int tpacpi_wlsw_emulstate;
 362 static int dbg_bluetoothemul;
 363 static int tpacpi_bluetooth_emulstate;
 364 static int dbg_wwanemul;
 365 static int tpacpi_wwan_emulstate;
 366 static int dbg_uwbemul;
 367 static int tpacpi_uwb_emulstate;
 368 #endif
 369
 370
 371 /*************************************************************************
 372  *  Debugging helpers
 373  */
 374
 375 #define dbg_printk(a_dbg_level, format, arg...) \
 376         do { if (dbg_level & (a_dbg_level)) \
 377                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 378         } while (0)
 379
 380 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 381 #define vdbg_printk dbg_printk
 382 static const char *str_supported(int is_supported);
 383 #else
 384 #define vdbg_printk(a_dbg_level, format, arg...) \
 385         do { } while (0)
 386 #endif
 387
 388 static void tpacpi_log_usertask(const char * const what)
 389 {
 390         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 391                 what, task_tgid_vnr(current));
 392 }
 393
 394 #define tpacpi_disclose_usertask(what, format, arg...) \
 395         do { \
 396                 if (unlikely( \
 397                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 398                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 399                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 400                                 what, task_tgid_vnr(current), ## arg); \
 401                 } \
 402         } while (0)
 403
 404 /*
 405  * Quirk handling helpers
 406  *
 407  * ThinkPad IDs and versions seen in the field so far
 408  * are two-characters from the set [0-9A-Z], i.e. base 36.
 409  *
 410  * We use values well outside that range as specials.
 411  */
 412
 413 #define TPACPI_MATCH_ANY                0xffffU
 414 #define TPACPI_MATCH_UNKNOWN            0U
 415
 416 /* TPID('1', 'Y') == 0x5931 */
 417 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 418
 419 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 420         { .vendor = PCI_VENDOR_ID_IBM,          \
 421           .bios = TPID(__id1, __id2),           \
 422           .ec = TPACPI_MATCH_ANY,               \
 423           .quirks = (__quirk) }
 424
 425 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 426         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 427           .bios = TPID(__id1, __id2),           \
 428           .ec = TPACPI_MATCH_ANY,               \
 429           .quirks = (__quirk) }
 430
 431 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 432         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 433           .bios = TPACPI_MATCH_ANY,             \
 434           .ec = TPID(__id1, __id2),             \
 435           .quirks = (__quirk) }
 436
 437 struct tpacpi_quirk {
 438         unsigned int vendor;
 439         u16 bios;
 440         u16 ec;
 441         unsigned long quirks;
 442 };
 443
 444 /**
 445  * tpacpi_check_quirks() - search BIOS/EC version on a list
 446  * @qlist:              array of &struct tpacpi_quirk
 447  * @qlist_size:         number of elements in @qlist
 448  *
 449  * Iterates over a quirks list until one is found that matches the
 450  * ThinkPad's vendor, BIOS and EC model.
 451  *
 452  * Returns 0 if nothing matches, otherwise returns the quirks field of
 453  * the matching &struct tpacpi_quirk entry.
 454  *
 455  * The match criteria is: vendor, ec and bios much match.
 456  */
 457 static unsigned long __init tpacpi_check_quirks(
 458                         const struct tpacpi_quirk *qlist,
 459                         unsigned int qlist_size)
 460 {
 461         while (qlist_size) {
 462                 if ((qlist->vendor == thinkpad_id.vendor ||
 463                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 464                     (qlist->bios == thinkpad_id.bios_model ||
 465                                 qlist->bios == TPACPI_MATCH_ANY) &&
 466                     (qlist->ec == thinkpad_id.ec_model ||
 467                                 qlist->ec == TPACPI_MATCH_ANY))
 468                         return qlist->quirks;
 469
 470                 qlist_size--;
 471                 qlist++;
 472         }
 473         return 0;
 474 }
 475
 476
 477 /****************************************************************************
 478  ****************************************************************************
 479  *
 480  * ACPI Helpers and device model
 481  *
 482  ****************************************************************************
 483  ****************************************************************************/
 484
 485 /*************************************************************************
 486  * ACPI basic handles
 487  */
 488
 489 static acpi_handle root_handle;
 490
 491 #define TPACPI_HANDLE(object, parent, paths...)                 \
 492         static acpi_handle  object##_handle;                    \
 493         static acpi_handle *object##_parent = &parent##_handle; \
 494         static char        *object##_path;                      \
 495         static char        *object##_paths[] = { paths }
 496
 497 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 498            "\\_SB.PCI.ISA.EC",  /* 570 */
 499            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 500            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 501            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 502            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 503            "\\_SB.PCI0.LPC.EC", /* all others */
 504            );
 505
 506 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 507 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 508
 509 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 510                                         /* T4x, X31, X40 */
 511            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 512            "\\CMS",             /* R40, R40e */
 513            );                   /* all others */
 514
 515 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 516            "^HKEY",             /* R30, R31 */
 517            "HKEY",              /* all others */
 518            );                   /* 570 */
 519
 520 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 521            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 522            "\\_SB.PCI0.VID0",   /* 770e */
 523            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 524            "\\_SB.PCI0.AGP.VID",        /* all others */
 525            );                           /* R30, R31 */
 526
 527
 528 /*************************************************************************
 529  * ACPI helpers
 530  */
 531
 532 static int acpi_evalf(acpi_handle handle,
 533                       void *res, char *method, char *fmt, ...)
 534 {
 535         char *fmt0 = fmt;
 536         struct acpi_object_list params;
 537         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 538         struct acpi_buffer result, *resultp;
 539         union acpi_object out_obj;
 540         acpi_status status;
 541         va_list ap;
 542         char res_type;
 543         int success;
 544         int quiet;
 545
 546         if (!*fmt) {
 547                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 548                 return 0;
 549         }
 550
 551         if (*fmt == 'q') {
 552                 quiet = 1;
 553                 fmt++;
 554         } else
 555                 quiet = 0;
 556
 557         res_type = *(fmt++);
 558
 559         params.count = 0;
 560         params.pointer = &in_objs[0];
 561
 562         va_start(ap, fmt);
 563         while (*fmt) {
 564                 char c = *(fmt++);
 565                 switch (c) {
 566                 case 'd':       /* int */
 567                         in_objs[params.count].integer.value = va_arg(ap, int);
 568                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 569                         break;
 570                         /* add more types as needed */
 571                 default:
 572                         printk(TPACPI_ERR "acpi_evalf() called "
 573                                "with invalid format character '%c'\n", c);
 574                         return 0;
 575                 }
 576         }
 577         va_end(ap);
 578
 579         if (res_type != 'v') {
 580                 result.length = sizeof(out_obj);
 581                 result.pointer = &out_obj;
 582                 resultp = &result;
 583         } else
 584                 resultp = NULL;
 585
 586         status = acpi_evaluate_object(handle, method, &params, resultp);
 587
 588         switch (res_type) {
 589         case 'd':               /* int */
 590                 if (res)
 591                         *(int *)res = out_obj.integer.value;
 592                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 593                 break;
 594         case 'v':               /* void */
 595                 success = status == AE_OK;
 596                 break;
 597                 /* add more types as needed */
 598         default:
 599                 printk(TPACPI_ERR "acpi_evalf() called "
 600                        "with invalid format character '%c'\n", res_type);
 601                 return 0;
 602         }
 603
 604         if (!success && !quiet)
 605                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 606                        method, fmt0, status);
 607
 608         return success;
 609 }
 610
 611 static int acpi_ec_read(int i, u8 *p)
 612 {
 613         int v;
 614
 615         if (ecrd_handle) {
 616                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 617                         return 0;
 618                 *p = v;
 619         } else {
 620                 if (ec_read(i, p) < 0)
 621                         return 0;
 622         }
 623
 624         return 1;
 625 }
 626
 627 static int acpi_ec_write(int i, u8 v)
 628 {
 629         if (ecwr_handle) {
 630                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 631                         return 0;
 632         } else {
 633                 if (ec_write(i, v) < 0)
 634                         return 0;
 635         }
 636
 637         return 1;
 638 }
 639
 640 static int issue_thinkpad_cmos_command(int cmos_cmd)
 641 {
 642         if (!cmos_handle)
 643                 return -ENXIO;
 644
 645         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 646                 return -EIO;
 647
 648         return 0;
 649 }
 650
 651 /*************************************************************************
 652  * ACPI device model
 653  */
 654
 655 #define TPACPI_ACPIHANDLE_INIT(object) \
 656         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 657                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 658
 659 static void drv_acpi_handle_init(char *name,
 660                            acpi_handle *handle, acpi_handle parent,
 661                            char **paths, int num_paths, char **path)
 662 {
 663         int i;
 664         acpi_status status;
 665
 666         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 667                 name);
 668
 669         for (i = 0; i < num_paths; i++) {
 670                 status = acpi_get_handle(parent, paths[i], handle);
 671                 if (ACPI_SUCCESS(status)) {
 672                         *path = paths[i];
 673                         dbg_printk(TPACPI_DBG_INIT,
 674                                    "Found ACPI handle %s for %s\n",
 675                                    *path, name);
 676                         return;
 677                 }
 678         }
 679
 680         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 681                     name);
 682         *handle = NULL;
 683 }
 684
 685 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 686 {
 687         struct ibm_struct *ibm = data;
 688
 689         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 690                 return;
 691
 692         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 693                 return;
 694
 695         ibm->acpi->notify(ibm, event);
 696 }
 697
 698 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 699 {
 700         acpi_status status;
 701         int rc;
 702
 703         BUG_ON(!ibm->acpi);
 704
 705         if (!*ibm->acpi->handle)
 706                 return 0;
 707
 708         vdbg_printk(TPACPI_DBG_INIT,
 709                 "setting up ACPI notify for %s\n", ibm->name);
 710
 711         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 712         if (rc < 0) {
 713                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 714                         ibm->name, rc);
 715                 return -ENODEV;
 716         }
 717
 718         ibm->acpi->device->driver_data = ibm;
 719         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 720                 TPACPI_ACPI_EVENT_PREFIX,
 721                 ibm->name);
 722
 723         status = acpi_install_notify_handler(*ibm->acpi->handle,
 724                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 725         if (ACPI_FAILURE(status)) {
 726                 if (status == AE_ALREADY_EXISTS) {
 727                         printk(TPACPI_NOTICE
 728                                "another device driver is already "
 729                                "handling %s events\n", ibm->name);
 730                 } else {
 731                         printk(TPACPI_ERR
 732                                "acpi_install_notify_handler(%s) failed: %d\n",
 733                                ibm->name, status);
 734                 }
 735                 return -ENODEV;
 736         }
 737         ibm->flags.acpi_notify_installed = 1;
 738         return 0;
 739 }
 740
 741 static int __init tpacpi_device_add(struct acpi_device *device)
 742 {
 743         return 0;
 744 }
 745
 746 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 747 {
 748         int rc;
 749
 750         dbg_printk(TPACPI_DBG_INIT,
 751                 "registering %s as an ACPI driver\n", ibm->name);
 752
 753         BUG_ON(!ibm->acpi);
 754
 755         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 756         if (!ibm->acpi->driver) {
 757                 printk(TPACPI_ERR
 758                        "failed to allocate memory for ibm->acpi->driver\n");
 759                 return -ENOMEM;
 760         }
 761
 762         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 763         ibm->acpi->driver->ids = ibm->acpi->hid;
 764
 765         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 766
 767         rc = acpi_bus_register_driver(ibm->acpi->driver);
 768         if (rc < 0) {
 769                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 770                        ibm->name, rc);
 771                 kfree(ibm->acpi->driver);
 772                 ibm->acpi->driver = NULL;
 773         } else if (!rc)
 774                 ibm->flags.acpi_driver_registered = 1;
 775
 776         return rc;
 777 }
 778
 779
 780 /****************************************************************************
 781  ****************************************************************************
 782  *
 783  * Procfs Helpers
 784  *
 785  ****************************************************************************
 786  ****************************************************************************/
 787
 788 static int dispatch_procfs_read(char *page, char **start, off_t off,
 789                         int count, int *eof, void *data)
 790 {
 791         struct ibm_struct *ibm = data;
 792         int len;
 793
 794         if (!ibm || !ibm->read)
 795                 return -EINVAL;
 796
 797         len = ibm->read(page);
 798         if (len < 0)
 799                 return len;
 800
 801         if (len <= off + count)
 802                 *eof = 1;
 803         *start = page + off;
 804         len -= off;
 805         if (len > count)
 806                 len = count;
 807         if (len < 0)
 808                 len = 0;
 809
 810         return len;
 811 }
 812
 813 static int dispatch_procfs_write(struct file *file,
 814                         const char __user *userbuf,
 815                         unsigned long count, void *data)
 816 {
 817         struct ibm_struct *ibm = data;
 818         char *kernbuf;
 819         int ret;
 820
 821         if (!ibm || !ibm->write)
 822                 return -EINVAL;
 823         if (count > PAGE_SIZE - 2)
 824                 return -EINVAL;
 825
 826         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 827         if (!kernbuf)
 828                 return -ENOMEM;
 829
 830         if (copy_from_user(kernbuf, userbuf, count)) {
 831                 kfree(kernbuf);
 832                 return -EFAULT;
 833         }
 834
 835         kernbuf[count] = 0;
 836         strcat(kernbuf, ",");
 837         ret = ibm->write(kernbuf);
 838         if (ret == 0)
 839                 ret = count;
 840
 841         kfree(kernbuf);
 842
 843         return ret;
 844 }
 845
 846 static char *next_cmd(char **cmds)
 847 {
 848         char *start = *cmds;
 849         char *end;
 850
 851         while ((end = strchr(start, ',')) && end == start)
 852                 start = end + 1;
 853
 854         if (!end)
 855                 return NULL;
 856
 857         *end = 0;
 858         *cmds = end + 1;
 859         return start;
 860 }
 861
 862
 863 /****************************************************************************
 864  ****************************************************************************
 865  *
 866  * Device model: input, hwmon and platform
 867  *
 868  ****************************************************************************
 869  ****************************************************************************/
 870
 871 static struct platform_device *tpacpi_pdev;
 872 static struct platform_device *tpacpi_sensors_pdev;
 873 static struct device *tpacpi_hwmon;
 874 static struct input_dev *tpacpi_inputdev;
 875 static struct mutex tpacpi_inputdev_send_mutex;
 876 static LIST_HEAD(tpacpi_all_drivers);
 877
 878 static int tpacpi_suspend_handler(struct platform_device *pdev,
 879                                   pm_message_t state)
 880 {
 881         struct ibm_struct *ibm, *itmp;
 882
 883         list_for_each_entry_safe(ibm, itmp,
 884                                  &tpacpi_all_drivers,
 885                                  all_drivers) {
 886                 if (ibm->suspend)
 887                         (ibm->suspend)(state);
 888         }
 889
 890         return 0;
 891 }
 892
 893 static int tpacpi_resume_handler(struct platform_device *pdev)
 894 {
 895         struct ibm_struct *ibm, *itmp;
 896
 897         list_for_each_entry_safe(ibm, itmp,
 898                                  &tpacpi_all_drivers,
 899                                  all_drivers) {
 900                 if (ibm->resume)
 901                         (ibm->resume)();
 902         }
 903
 904         return 0;
 905 }
 906
 907 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 908 {
 909         struct ibm_struct *ibm, *itmp;
 910
 911         list_for_each_entry_safe(ibm, itmp,
 912                                  &tpacpi_all_drivers,
 913                                  all_drivers) {
 914                 if (ibm->shutdown)
 915                         (ibm->shutdown)();
 916         }
 917 }
 918
 919 static struct platform_driver tpacpi_pdriver = {
 920         .driver = {
 921                 .name = TPACPI_DRVR_NAME,
 922                 .owner = THIS_MODULE,
 923         },
 924         .suspend = tpacpi_suspend_handler,
 925         .resume = tpacpi_resume_handler,
 926         .shutdown = tpacpi_shutdown_handler,
 927 };
 928
 929 static struct platform_driver tpacpi_hwmon_pdriver = {
 930         .driver = {
 931                 .name = TPACPI_HWMON_DRVR_NAME,
 932                 .owner = THIS_MODULE,
 933         },
 934 };
 935
 936 /*************************************************************************
 937  * sysfs support helpers
 938  */
 939
 940 struct attribute_set {
 941         unsigned int members, max_members;
 942         struct attribute_group group;
 943 };
 944
 945 struct attribute_set_obj {
 946         struct attribute_set s;
 947         struct attribute *a;
 948 } __attribute__((packed));
 949
 950 static struct attribute_set *create_attr_set(unsigned int max_members,
 951                                                 const char *name)
 952 {
 953         struct attribute_set_obj *sobj;
 954
 955         if (max_members == 0)
 956                 return NULL;
 957
 958         /* Allocates space for implicit NULL at the end too */
 959         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 960                     max_members * sizeof(struct attribute *),
 961                     GFP_KERNEL);
 962         if (!sobj)
 963                 return NULL;
 964         sobj->s.max_members = max_members;
 965         sobj->s.group.attrs = &sobj->a;
 966         sobj->s.group.name = name;
 967
 968         return &sobj->s;
 969 }
 970
 971 #define destroy_attr_set(_set) \
 972         kfree(_set);
 973
 974 /* not multi-threaded safe, use it in a single thread per set */
 975 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 976 {
 977         if (!s || !attr)
 978                 return -EINVAL;
 979
 980         if (s->members >= s->max_members)
 981                 return -ENOMEM;
 982
 983         s->group.attrs[s->members] = attr;
 984         s->members++;
 985
 986         return 0;
 987 }
 988
 989 static int add_many_to_attr_set(struct attribute_set *s,
 990                         struct attribute **attr,
 991                         unsigned int count)
 992 {
 993         int i, res;
 994
 995         for (i = 0; i < count; i++) {
 996                 res = add_to_attr_set(s, attr[i]);
 997                 if (res)
 998                         return res;
 999         }
1000
1001         return 0;
1002 }
1003
1004 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1005 {
1006         sysfs_remove_group(kobj, &s->group);
1007         destroy_attr_set(s);
1008 }
1009
1010 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1011         sysfs_create_group(_kobj, &_attr_set->group)
1012
1013 static int parse_strtoul(const char *buf,
1014                 unsigned long max, unsigned long *value)
1015 {
1016         char *endp;
1017
1018         while (*buf && isspace(*buf))
1019                 buf++;
1020         *value = simple_strtoul(buf, &endp, 0);
1021         while (*endp && isspace(*endp))
1022                 endp++;
1023         if (*endp || *value > max)
1024                 return -EINVAL;
1025
1026         return 0;
1027 }
1028
1029 static void tpacpi_disable_brightness_delay(void)
1030 {
1031         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1032                 printk(TPACPI_NOTICE
1033                         "ACPI backlight control delay disabled\n");
1034 }
1035
1036 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1037 {
1038         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1039         union acpi_object *obj;
1040         int rc;
1041
1042         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1043                 obj = (union acpi_object *)buffer.pointer;
1044                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1045                         printk(TPACPI_ERR "Unknown _BCL data, "
1046                                "please report this to %s\n", TPACPI_MAIL);
1047                         rc = 0;
1048                 } else {
1049                         rc = obj->package.count;
1050                 }
1051         } else {
1052                 return 0;
1053         }
1054
1055         kfree(buffer.pointer);
1056         return rc;
1057 }
1058
1059 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1060                                         u32 lvl, void *context, void **rv)
1061 {
1062         char name[ACPI_PATH_SEGMENT_LENGTH];
1063         struct acpi_buffer buffer = { sizeof(name), &name };
1064
1065         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1066             !strncmp("_BCL", name, sizeof(name) - 1)) {
1067                 BUG_ON(!rv || !*rv);
1068                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1069                 return AE_CTRL_TERMINATE;
1070         } else {
1071                 return AE_OK;
1072         }
1073 }
1074
1075 /*
1076  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1077  */
1078 static int __init tpacpi_check_std_acpi_brightness_support(void)
1079 {
1080         int status;
1081         int bcl_levels = 0;
1082         void *bcl_ptr = &bcl_levels;
1083
1084         if (!vid_handle) {
1085                 TPACPI_ACPIHANDLE_INIT(vid);
1086         }
1087         if (!vid_handle)
1088                 return 0;
1089
1090         /*
1091          * Search for a _BCL method, and execute it.  This is safe on all
1092          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1093          * BIOS in ACPI backlight control mode.  We do NOT have to care
1094          * about calling the _BCL method in an enabled video device, any
1095          * will do for our purposes.
1096          */
1097
1098         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1099                                      tpacpi_acpi_walk_find_bcl, NULL,
1100                                      &bcl_ptr);
1101
1102         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1103                 tp_features.bright_acpimode = 1;
1104                 return (bcl_levels - 2);
1105         }
1106
1107         return 0;
1108 }
1109
1110 static void printk_deprecated_attribute(const char * const what,
1111                                         const char * const details)
1112 {
1113         tpacpi_log_usertask("deprecated sysfs attribute");
1114         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1115                 "will be removed. %s\n",
1116                 what, details);
1117 }
1118
1119 /*************************************************************************
1120  * rfkill and radio control support helpers
1121  */
1122
1123 /*
1124  * ThinkPad-ACPI firmware handling model:
1125  *
1126  * WLSW (master wireless switch) is event-driven, and is common to all
1127  * firmware-controlled radios.  It cannot be controlled, just monitored,
1128  * as expected.  It overrides all radio state in firmware
1129  *
1130  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1131  * (TODO: verify how WLSW interacts with the returned radio state).
1132  *
1133  * The only time there are shadow radio state changes, is when
1134  * masked-off hotkeys are used.
1135  */
1136
1137 /*
1138  * Internal driver API for radio state:
1139  *
1140  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1141  * bool: true means radio blocked (off)
1142  */
1143 enum tpacpi_rfkill_state {
1144         TPACPI_RFK_RADIO_OFF = 0,
1145         TPACPI_RFK_RADIO_ON
1146 };
1147
1148 /* rfkill switches */
1149 enum tpacpi_rfk_id {
1150         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1151         TPACPI_RFK_WWAN_SW_ID,
1152         TPACPI_RFK_UWB_SW_ID,
1153         TPACPI_RFK_SW_MAX
1154 };
1155
1156 static const char *tpacpi_rfkill_names[] = {
1157         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1158         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1159         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1160         [TPACPI_RFK_SW_MAX] = NULL
1161 };
1162
1163 /* ThinkPad-ACPI rfkill subdriver */
1164 struct tpacpi_rfk {
1165         struct rfkill *rfkill;
1166         enum tpacpi_rfk_id id;
1167         const struct tpacpi_rfk_ops *ops;
1168 };
1169
1170 struct tpacpi_rfk_ops {
1171         /* firmware interface */
1172         int (*get_status)(void);
1173         int (*set_status)(const enum tpacpi_rfkill_state);
1174 };
1175
1176 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1177
1178 /* Query FW and update rfkill sw state for a given rfkill switch */
1179 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1180 {
1181         int status;
1182
1183         if (!tp_rfk)
1184                 return -ENODEV;
1185
1186         status = (tp_rfk->ops->get_status)();
1187         if (status < 0)
1188                 return status;
1189
1190         rfkill_set_sw_state(tp_rfk->rfkill,
1191                             (status == TPACPI_RFK_RADIO_OFF));
1192
1193         return status;
1194 }
1195
1196 /* Query FW and update rfkill sw state for all rfkill switches */
1197 static void tpacpi_rfk_update_swstate_all(void)
1198 {
1199         unsigned int i;
1200
1201         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1202                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1203 }
1204
1205 /*
1206  * Sync the HW-blocking state of all rfkill switches,
1207  * do notice it causes the rfkill core to schedule uevents
1208  */
1209 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1210 {
1211         unsigned int i;
1212         struct tpacpi_rfk *tp_rfk;
1213
1214         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1215                 tp_rfk = tpacpi_rfkill_switches[i];
1216                 if (tp_rfk) {
1217                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1218                                                 blocked)) {
1219                                 /* ignore -- we track sw block */
1220                         }
1221                 }
1222         }
1223 }
1224
1225 /* Call to get the WLSW state from the firmware */
1226 static int hotkey_get_wlsw(void);
1227
1228 /* Call to query WLSW state and update all rfkill switches */
1229 static bool tpacpi_rfk_check_hwblock_state(void)
1230 {
1231         int res = hotkey_get_wlsw();
1232         int hw_blocked;
1233
1234         /* When unknown or unsupported, we have to assume it is unblocked */
1235         if (res < 0)
1236                 return false;
1237
1238         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1239         tpacpi_rfk_update_hwblock_state(hw_blocked);
1240
1241         return hw_blocked;
1242 }
1243
1244 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1245 {
1246         struct tpacpi_rfk *tp_rfk = data;
1247         int res;
1248
1249         dbg_printk(TPACPI_DBG_RFKILL,
1250                    "request to change radio state to %s\n",
1251                    blocked ? "blocked" : "unblocked");
1252
1253         /* try to set radio state */
1254         res = (tp_rfk->ops->set_status)(blocked ?
1255                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1256
1257         /* and update the rfkill core with whatever the FW really did */
1258         tpacpi_rfk_update_swstate(tp_rfk);
1259
1260         return (res < 0) ? res : 0;
1261 }
1262
1263 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1264         .set_block = tpacpi_rfk_hook_set_block,
1265 };
1266
1267 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1268                         const struct tpacpi_rfk_ops *tp_rfkops,
1269                         const enum rfkill_type rfktype,
1270                         const char *name,
1271                         const bool set_default)
1272 {
1273         struct tpacpi_rfk *atp_rfk;
1274         int res;
1275         bool sw_state = false;
1276         bool hw_state;
1277         int sw_status;
1278
1279         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1280
1281         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1282         if (atp_rfk)
1283                 atp_rfk->rfkill = rfkill_alloc(name,
1284                                                 &tpacpi_pdev->dev,
1285                                                 rfktype,
1286                                                 &tpacpi_rfk_rfkill_ops,
1287                                                 atp_rfk);
1288         if (!atp_rfk || !atp_rfk->rfkill) {
1289                 printk(TPACPI_ERR
1290                         "failed to allocate memory for rfkill class\n");
1291                 kfree(atp_rfk);
1292                 return -ENOMEM;
1293         }
1294
1295         atp_rfk->id = id;
1296         atp_rfk->ops = tp_rfkops;
1297
1298         sw_status = (tp_rfkops->get_status)();
1299         if (sw_status < 0) {
1300                 printk(TPACPI_ERR
1301                         "failed to read initial state for %s, error %d\n",
1302                         name, sw_status);
1303         } else {
1304                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1305                 if (set_default) {
1306                         /* try to keep the initial state, since we ask the
1307                          * firmware to preserve it across S5 in NVRAM */
1308                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1309                 }
1310         }
1311         hw_state = tpacpi_rfk_check_hwblock_state();
1312         rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1313
1314         res = rfkill_register(atp_rfk->rfkill);
1315         if (res < 0) {
1316                 printk(TPACPI_ERR
1317                         "failed to register %s rfkill switch: %d\n",
1318                         name, res);
1319                 rfkill_destroy(atp_rfk->rfkill);
1320                 kfree(atp_rfk);
1321                 return res;
1322         }
1323
1324         tpacpi_rfkill_switches[id] = atp_rfk;
1325
1326         printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n",
1327                 name, (sw_state || hw_state) ? "" : "un");
1328         return 0;
1329 }
1330
1331 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1332 {
1333         struct tpacpi_rfk *tp_rfk;
1334
1335         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1336
1337         tp_rfk = tpacpi_rfkill_switches[id];
1338         if (tp_rfk) {
1339                 rfkill_unregister(tp_rfk->rfkill);
1340                 rfkill_destroy(tp_rfk->rfkill);
1341                 tpacpi_rfkill_switches[id] = NULL;
1342                 kfree(tp_rfk);
1343         }
1344 }
1345
1346 static void printk_deprecated_rfkill_attribute(const char * const what)
1347 {
1348         printk_deprecated_attribute(what,
1349                         "Please switch to generic rfkill before year 2010");
1350 }
1351
1352 /* sysfs <radio> enable ------------------------------------------------ */
1353 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1354                                             struct device_attribute *attr,
1355                                             char *buf)
1356 {
1357         int status;
1358
1359         printk_deprecated_rfkill_attribute(attr->attr.name);
1360
1361         /* This is in the ABI... */
1362         if (tpacpi_rfk_check_hwblock_state()) {
1363                 status = TPACPI_RFK_RADIO_OFF;
1364         } else {
1365                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1366                 if (status < 0)
1367                         return status;
1368         }
1369
1370         return snprintf(buf, PAGE_SIZE, "%d\n",
1371                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1372 }
1373
1374 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1375                             struct device_attribute *attr,
1376                             const char *buf, size_t count)
1377 {
1378         unsigned long t;
1379         int res;
1380
1381         printk_deprecated_rfkill_attribute(attr->attr.name);
1382
1383         if (parse_strtoul(buf, 1, &t))
1384                 return -EINVAL;
1385
1386         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1387
1388         /* This is in the ABI... */
1389         if (tpacpi_rfk_check_hwblock_state() && !!t)
1390                 return -EPERM;
1391
1392         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1393                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1394         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1395
1396         return (res < 0) ? res : count;
1397 }
1398
1399 /* procfs -------------------------------------------------------------- */
1400 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1401 {
1402         int len = 0;
1403
1404         if (id >= TPACPI_RFK_SW_MAX)
1405                 len += sprintf(p + len, "status:\t\tnot supported\n");
1406         else {
1407                 int status;
1408
1409                 /* This is in the ABI... */
1410                 if (tpacpi_rfk_check_hwblock_state()) {
1411                         status = TPACPI_RFK_RADIO_OFF;
1412                 } else {
1413                         status = tpacpi_rfk_update_swstate(
1414                                                 tpacpi_rfkill_switches[id]);
1415                         if (status < 0)
1416                                 return status;
1417                 }
1418
1419                 len += sprintf(p + len, "status:\t\t%s\n",
1420                                 (status == TPACPI_RFK_RADIO_ON) ?
1421                                         "enabled" : "disabled");
1422                 len += sprintf(p + len, "commands:\tenable, disable\n");
1423         }
1424
1425         return len;
1426 }
1427
1428 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1429 {
1430         char *cmd;
1431         int status = -1;
1432         int res = 0;
1433
1434         if (id >= TPACPI_RFK_SW_MAX)
1435                 return -ENODEV;
1436
1437         while ((cmd = next_cmd(&buf))) {
1438                 if (strlencmp(cmd, "enable") == 0)
1439                         status = TPACPI_RFK_RADIO_ON;
1440                 else if (strlencmp(cmd, "disable") == 0)
1441                         status = TPACPI_RFK_RADIO_OFF;
1442                 else
1443                         return -EINVAL;
1444         }
1445
1446         if (status != -1) {
1447                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1448                                 (status == TPACPI_RFK_RADIO_ON) ?
1449                                                 "enable" : "disable",
1450                                 tpacpi_rfkill_names[id]);
1451                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1452                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1453         }
1454
1455         return res;
1456 }
1457
1458 /*************************************************************************
1459  * thinkpad-acpi driver attributes
1460  */
1461
1462 /* interface_version --------------------------------------------------- */
1463 static ssize_t tpacpi_driver_interface_version_show(
1464                                 struct device_driver *drv,
1465                                 char *buf)
1466 {
1467         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1468 }
1469
1470 static DRIVER_ATTR(interface_version, S_IRUGO,
1471                 tpacpi_driver_interface_version_show, NULL);
1472
1473 /* debug_level --------------------------------------------------------- */
1474 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1475                                                 char *buf)
1476 {
1477         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1478 }
1479
1480 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1481                                                 const char *buf, size_t count)
1482 {
1483         unsigned long t;
1484
1485         if (parse_strtoul(buf, 0xffff, &t))
1486                 return -EINVAL;
1487
1488         dbg_level = t;
1489
1490         return count;
1491 }
1492
1493 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1494                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1495
1496 /* version ------------------------------------------------------------- */
1497 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1498                                                 char *buf)
1499 {
1500         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1501                         TPACPI_DESC, TPACPI_VERSION);
1502 }
1503
1504 static DRIVER_ATTR(version, S_IRUGO,
1505                 tpacpi_driver_version_show, NULL);
1506
1507 /* --------------------------------------------------------------------- */
1508
1509 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1510
1511 /* wlsw_emulstate ------------------------------------------------------ */
1512 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1513                                                 char *buf)
1514 {
1515         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1516 }
1517
1518 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1519                                                 const char *buf, size_t count)
1520 {
1521         unsigned long t;
1522
1523         if (parse_strtoul(buf, 1, &t))
1524                 return -EINVAL;
1525
1526         if (tpacpi_wlsw_emulstate != !!t) {
1527                 tpacpi_wlsw_emulstate = !!t;
1528                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1529         }
1530
1531         return count;
1532 }
1533
1534 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1535                 tpacpi_driver_wlsw_emulstate_show,
1536                 tpacpi_driver_wlsw_emulstate_store);
1537
1538 /* bluetooth_emulstate ------------------------------------------------- */
1539 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1540                                         struct device_driver *drv,
1541                                         char *buf)
1542 {
1543         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1544 }
1545
1546 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1547                                         struct device_driver *drv,
1548                                         const char *buf, size_t count)
1549 {
1550         unsigned long t;
1551
1552         if (parse_strtoul(buf, 1, &t))
1553                 return -EINVAL;
1554
1555         tpacpi_bluetooth_emulstate = !!t;
1556
1557         return count;
1558 }
1559
1560 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1561                 tpacpi_driver_bluetooth_emulstate_show,
1562                 tpacpi_driver_bluetooth_emulstate_store);
1563
1564 /* wwan_emulstate ------------------------------------------------- */
1565 static ssize_t tpacpi_driver_wwan_emulstate_show(
1566                                         struct device_driver *drv,
1567                                         char *buf)
1568 {
1569         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1570 }
1571
1572 static ssize_t tpacpi_driver_wwan_emulstate_store(
1573                                         struct device_driver *drv,
1574                                         const char *buf, size_t count)
1575 {
1576         unsigned long t;
1577
1578         if (parse_strtoul(buf, 1, &t))
1579                 return -EINVAL;
1580
1581         tpacpi_wwan_emulstate = !!t;
1582
1583         return count;
1584 }
1585
1586 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1587                 tpacpi_driver_wwan_emulstate_show,
1588                 tpacpi_driver_wwan_emulstate_store);
1589
1590 /* uwb_emulstate ------------------------------------------------- */
1591 static ssize_t tpacpi_driver_uwb_emulstate_show(
1592                                         struct device_driver *drv,
1593                                         char *buf)
1594 {
1595         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1596 }
1597
1598 static ssize_t tpacpi_driver_uwb_emulstate_store(
1599                                         struct device_driver *drv,
1600                                         const char *buf, size_t count)
1601 {
1602         unsigned long t;
1603
1604         if (parse_strtoul(buf, 1, &t))
1605                 return -EINVAL;
1606
1607         tpacpi_uwb_emulstate = !!t;
1608
1609         return count;
1610 }
1611
1612 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1613                 tpacpi_driver_uwb_emulstate_show,
1614                 tpacpi_driver_uwb_emulstate_store);
1615 #endif
1616
1617 /* --------------------------------------------------------------------- */
1618
1619 static struct driver_attribute *tpacpi_driver_attributes[] = {
1620         &driver_attr_debug_level, &driver_attr_version,
1621         &driver_attr_interface_version,
1622 };
1623
1624 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1625 {
1626         int i, res;
1627
1628         i = 0;
1629         res = 0;
1630         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1631                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1632                 i++;
1633         }
1634
1635 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1636         if (!res && dbg_wlswemul)
1637                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1638         if (!res && dbg_bluetoothemul)
1639                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1640         if (!res && dbg_wwanemul)
1641                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1642         if (!res && dbg_uwbemul)
1643                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1644 #endif
1645
1646         return res;
1647 }
1648
1649 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1650 {
1651         int i;
1652
1653         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1654                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1655
1656 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1657         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1658         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1659         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1660         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1661 #endif
1662 }
1663
1664 /*************************************************************************
1665  * Firmware Data
1666  */
1667
1668 /*
1669  * Table of recommended minimum BIOS versions
1670  *
1671  * Reasons for listing:
1672  *    1. Stable BIOS, listed because the unknown ammount of
1673  *       bugs and bad ACPI behaviour on older versions
1674  *
1675  *    2. BIOS or EC fw with known bugs that trigger on Linux
1676  *
1677  *    3. BIOS with known reduced functionality in older versions
1678  *
1679  *  We recommend the latest BIOS and EC version.
1680  *  We only support the latest BIOS and EC fw version as a rule.
1681  *
1682  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1683  *  Information from users in ThinkWiki
1684  *
1685  *  WARNING: we use this table also to detect that the machine is
1686  *  a ThinkPad in some cases, so don't remove entries lightly.
1687  */
1688
1689 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1690         { .vendor       = (__v),                        \
1691           .bios         = TPID(__id1, __id2),           \
1692           .ec           = TPACPI_MATCH_ANY,             \
1693           .quirks       = TPACPI_MATCH_ANY << 16        \
1694                           | (__bv1) << 8 | (__bv2) }
1695
1696 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1697                 __eid, __ev1, __ev2)                    \
1698         { .vendor       = (__v),                        \
1699           .bios         = TPID(__bid1, __bid2),         \
1700           .ec           = __eid,                        \
1701           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1702                           | (__bv1) << 8 | (__bv2) }
1703
1704 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1705         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1706
1707 /* Outdated IBM BIOSes often lack the EC id string */
1708 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1709         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1710                 __bv1, __bv2, TPID(__id1, __id2),       \
1711                 __ev1, __ev2),                          \
1712         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1713                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1714                 __ev1, __ev2)
1715
1716 /* Outdated IBM BIOSes often lack the EC id string */
1717 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1718                 __eid1, __eid2, __ev1, __ev2)           \
1719         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1720                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1721                 __ev1, __ev2),                          \
1722         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1723                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1724                 __ev1, __ev2)
1725
1726 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1727         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1728
1729 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1730         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1731                 __bv1, __bv2, TPID(__id1, __id2),       \
1732                 __ev1, __ev2)
1733
1734 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1735                 __eid1, __eid2, __ev1, __ev2)           \
1736         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1737                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1738                 __ev1, __ev2)
1739
1740 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1741         /*  Numeric models ------------------ */
1742         /*      FW MODEL   BIOS VERS          */
1743         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1744         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1745         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1746         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1747         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1748         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1749         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1750         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1751         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1752
1753         /* A-series ------------------------- */
1754         /*      FW MODEL   BIOS VERS  EC VERS */
1755         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1756         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1757         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1758         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1759         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1760         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1761         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1762         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1763         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1764         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1765         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1766
1767         /* G-series ------------------------- */
1768         /*      FW MODEL   BIOS VERS          */
1769         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1770         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1771
1772         /* R-series, T-series --------------- */
1773         /*      FW MODEL   BIOS VERS  EC VERS */
1774         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1775         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1776         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1777         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1778         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1779         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1780         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1781                                                     T40/p, T41/p, T42/p (1) */
1782         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1783         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1784         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1785         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1786
1787         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1788         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1789         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1790         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1791         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1792         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1793
1794         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1795         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1796         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1797
1798         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1799         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1800         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1801
1802         /* X-series ------------------------- */
1803         /*      FW MODEL   BIOS VERS  EC VERS */
1804         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1805         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1806         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1807         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1808         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1809         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1810         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1811
1812         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1813         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1814
1815         /* (0) - older versions lack DMI EC fw string and functionality */
1816         /* (1) - older versions known to lack functionality */
1817 };
1818
1819 #undef TPV_QL1
1820 #undef TPV_QL0
1821 #undef TPV_QI2
1822 #undef TPV_QI1
1823 #undef TPV_QI0
1824 #undef TPV_Q_X
1825 #undef TPV_Q
1826
1827 static void __init tpacpi_check_outdated_fw(void)
1828 {
1829         unsigned long fwvers;
1830         u16 ec_version, bios_version;
1831
1832         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1833                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1834
1835         if (!fwvers)
1836                 return;
1837
1838         bios_version = fwvers & 0xffffU;
1839         ec_version = (fwvers >> 16) & 0xffffU;
1840
1841         /* note that unknown versions are set to 0x0000 and we use that */
1842         if ((bios_version > thinkpad_id.bios_release) ||
1843             (ec_version > thinkpad_id.ec_release &&
1844                                 ec_version != TPACPI_MATCH_ANY)) {
1845                 /*
1846                  * The changelogs would let us track down the exact
1847                  * reason, but it is just too much of a pain to track
1848                  * it.  We only list BIOSes that are either really
1849                  * broken, or really stable to begin with, so it is
1850                  * best if the user upgrades the firmware anyway.
1851                  */
1852                 printk(TPACPI_WARN
1853                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1854                 printk(TPACPI_WARN
1855                         "WARNING: This firmware may be missing critical bug "
1856                         "fixes and/or important features\n");
1857         }
1858 }
1859
1860 static bool __init tpacpi_is_fw_known(void)
1861 {
1862         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1863                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1864 }
1865
1866 /****************************************************************************
1867  ****************************************************************************
1868  *
1869  * Subdrivers
1870  *
1871  ****************************************************************************
1872  ****************************************************************************/
1873
1874 /*************************************************************************
1875  * thinkpad-acpi init subdriver
1876  */
1877
1878 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1879 {
1880         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1881         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1882
1883         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1884                 (thinkpad_id.bios_version_str) ?
1885                         thinkpad_id.bios_version_str : "unknown",
1886                 (thinkpad_id.ec_version_str) ?
1887                         thinkpad_id.ec_version_str : "unknown");
1888
1889         if (thinkpad_id.vendor && thinkpad_id.model_str)
1890                 printk(TPACPI_INFO "%s %s, model %s\n",
1891                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1892                                 "IBM" : ((thinkpad_id.vendor ==
1893                                                 PCI_VENDOR_ID_LENOVO) ?
1894                                         "Lenovo" : "Unknown vendor"),
1895                         thinkpad_id.model_str,
1896                         (thinkpad_id.nummodel_str) ?
1897                                 thinkpad_id.nummodel_str : "unknown");
1898
1899         tpacpi_check_outdated_fw();
1900         return 0;
1901 }
1902
1903 static int thinkpad_acpi_driver_read(char *p)
1904 {
1905         int len = 0;
1906
1907         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1908         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1909
1910         return len;
1911 }
1912
1913 static struct ibm_struct thinkpad_acpi_driver_data = {
1914         .name = "driver",
1915         .read = thinkpad_acpi_driver_read,
1916 };
1917
1918 /*************************************************************************
1919  * Hotkey subdriver
1920  */
1921
1922 /*
1923  * ThinkPad firmware event model
1924  *
1925  * The ThinkPad firmware has two main event interfaces: normal ACPI
1926  * notifications (which follow the ACPI standard), and a private event
1927  * interface.
1928  *
1929  * The private event interface also issues events for the hotkeys.  As
1930  * the driver gained features, the event handling code ended up being
1931  * built around the hotkey subdriver.  This will need to be refactored
1932  * to a more formal event API eventually.
1933  *
1934  * Some "hotkeys" are actually supposed to be used as event reports,
1935  * such as "brightness has changed", "volume has changed", depending on
1936  * the ThinkPad model and how the firmware is operating.
1937  *
1938  * Unlike other classes, hotkey-class events have mask/unmask control on
1939  * non-ancient firmware.  However, how it behaves changes a lot with the
1940  * firmware model and version.
1941  */
1942
1943 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1944         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1945         TP_ACPI_HOTKEYSCAN_FNF2,
1946         TP_ACPI_HOTKEYSCAN_FNF3,
1947         TP_ACPI_HOTKEYSCAN_FNF4,
1948         TP_ACPI_HOTKEYSCAN_FNF5,
1949         TP_ACPI_HOTKEYSCAN_FNF6,
1950         TP_ACPI_HOTKEYSCAN_FNF7,
1951         TP_ACPI_HOTKEYSCAN_FNF8,
1952         TP_ACPI_HOTKEYSCAN_FNF9,
1953         TP_ACPI_HOTKEYSCAN_FNF10,
1954         TP_ACPI_HOTKEYSCAN_FNF11,
1955         TP_ACPI_HOTKEYSCAN_FNF12,
1956         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1957         TP_ACPI_HOTKEYSCAN_FNINSERT,
1958         TP_ACPI_HOTKEYSCAN_FNDELETE,
1959         TP_ACPI_HOTKEYSCAN_FNHOME,
1960         TP_ACPI_HOTKEYSCAN_FNEND,
1961         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1962         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1963         TP_ACPI_HOTKEYSCAN_FNSPACE,
1964         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1965         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1966         TP_ACPI_HOTKEYSCAN_MUTE,
1967         TP_ACPI_HOTKEYSCAN_THINKPAD,
1968 };
1969
1970 enum {  /* Keys/events available through NVRAM polling */
1971         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1972         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1973 };
1974
1975 enum {  /* Positions of some of the keys in hotkey masks */
1976         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1977         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1978         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1979         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1980         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1981         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1982         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1983         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1984         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1985         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1986         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1987 };
1988
1989 enum {  /* NVRAM to ACPI HKEY group map */
1990         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1991                                           TP_ACPI_HKEY_ZOOM_MASK |
1992                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1993                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1994         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1995                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1996         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1997                                           TP_ACPI_HKEY_VOLDWN_MASK |
1998                                           TP_ACPI_HKEY_MUTE_MASK,
1999 };
2000
2001 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2002 struct tp_nvram_state {
2003        u16 thinkpad_toggle:1;
2004        u16 zoom_toggle:1;
2005        u16 display_toggle:1;
2006        u16 thinklight_toggle:1;
2007        u16 hibernate_toggle:1;
2008        u16 displayexp_toggle:1;
2009        u16 display_state:1;
2010        u16 brightness_toggle:1;
2011        u16 volume_toggle:1;
2012        u16 mute:1;
2013
2014        u8 brightness_level;
2015        u8 volume_level;
2016 };
2017
2018 /* kthread for the hotkey poller */
2019 static struct task_struct *tpacpi_hotkey_task;
2020
2021 /* Acquired while the poller kthread is running, use to sync start/stop */
2022 static struct mutex hotkey_thread_mutex;
2023
2024 /*
2025  * Acquire mutex to write poller control variables as an
2026  * atomic block.
2027  *
2028  * Increment hotkey_config_change when changing them if you
2029  * want the kthread to forget old state.
2030  *
2031  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2032  */
2033 static struct mutex hotkey_thread_data_mutex;
2034 static unsigned int hotkey_config_change;
2035
2036 /*
2037  * hotkey poller control variables
2038  *
2039  * Must be atomic or readers will also need to acquire mutex
2040  *
2041  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2042  * should be used only when the changes need to be taken as
2043  * a block, OR when one needs to force the kthread to forget
2044  * old state.
2045  */
2046 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2047 static unsigned int hotkey_poll_freq = 10; /* Hz */
2048
2049 #define HOTKEY_CONFIG_CRITICAL_START \
2050         do { \
2051                 mutex_lock(&hotkey_thread_data_mutex); \
2052                 hotkey_config_change++; \
2053         } while (0);
2054 #define HOTKEY_CONFIG_CRITICAL_END \
2055         mutex_unlock(&hotkey_thread_data_mutex);
2056
2057 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2058
2059 #define hotkey_source_mask 0U
2060 #define HOTKEY_CONFIG_CRITICAL_START
2061 #define HOTKEY_CONFIG_CRITICAL_END
2062
2063 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2064
2065 static struct mutex hotkey_mutex;
2066
2067 static enum {   /* Reasons for waking up */
2068         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2069         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2070         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2071 } hotkey_wakeup_reason;
2072
2073 static int hotkey_autosleep_ack;
2074
2075 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2076 static u32 hotkey_all_mask;             /* all events supported in fw */
2077 static u32 hotkey_reserved_mask;        /* events better left disabled */
2078 static u32 hotkey_driver_mask;          /* events needed by the driver */
2079 static u32 hotkey_user_mask;            /* events visible to userspace */
2080 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2081
2082 static unsigned int hotkey_report_mode;
2083
2084 static u16 *hotkey_keycode_map;
2085
2086 static struct attribute_set *hotkey_dev_attributes;
2087
2088 static void tpacpi_driver_event(const unsigned int hkey_event);
2089 static void hotkey_driver_event(const unsigned int scancode);
2090
2091 /* HKEY.MHKG() return bits */
2092 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2093
2094 static int hotkey_get_wlsw(void)
2095 {
2096         int status;
2097
2098         if (!tp_features.hotkey_wlsw)
2099                 return -ENODEV;
2100
2101 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2102         if (dbg_wlswemul)
2103                 return (tpacpi_wlsw_emulstate) ?
2104                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2105 #endif
2106
2107         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2108                 return -EIO;
2109
2110         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2111 }
2112
2113 static int hotkey_get_tablet_mode(int *status)
2114 {
2115         int s;
2116
2117         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2118                 return -EIO;
2119
2120         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2121         return 0;
2122 }
2123
2124 /*
2125  * Reads current event mask from firmware, and updates
2126  * hotkey_acpi_mask accordingly.  Also resets any bits
2127  * from hotkey_user_mask that are unavailable to be
2128  * delivered (shadow requirement of the userspace ABI).
2129  *
2130  * Call with hotkey_mutex held
2131  */
2132 static int hotkey_mask_get(void)
2133 {
2134         if (tp_features.hotkey_mask) {
2135                 u32 m = 0;
2136
2137                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2138                         return -EIO;
2139
2140                 hotkey_acpi_mask = m;
2141         } else {
2142                 /* no mask support doesn't mean no event support... */
2143                 hotkey_acpi_mask = hotkey_all_mask;
2144         }
2145
2146         /* sync userspace-visible mask */
2147         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2148
2149         return 0;
2150 }
2151
2152 void static hotkey_mask_warn_incomplete_mask(void)
2153 {
2154         /* log only what the user can fix... */
2155         const u32 wantedmask = hotkey_driver_mask &
2156                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2157                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2158
2159         if (wantedmask)
2160                 printk(TPACPI_NOTICE
2161                         "required events 0x%08x not enabled!\n",
2162                         wantedmask);
2163 }
2164
2165 /*
2166  * Set the firmware mask when supported
2167  *
2168  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2169  *
2170  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2171  *
2172  * Call with hotkey_mutex held
2173  */
2174 static int hotkey_mask_set(u32 mask)
2175 {
2176         int i;
2177         int rc = 0;
2178
2179         const u32 fwmask = mask & ~hotkey_source_mask;
2180
2181         if (tp_features.hotkey_mask) {
2182                 for (i = 0; i < 32; i++) {
2183                         if (!acpi_evalf(hkey_handle,
2184                                         NULL, "MHKM", "vdd", i + 1,
2185                                         !!(mask & (1 << i)))) {
2186                                 rc = -EIO;
2187                                 break;
2188                         }
2189                 }
2190         }
2191
2192         /*
2193          * We *must* make an inconditional call to hotkey_mask_get to
2194          * refresh hotkey_acpi_mask and update hotkey_user_mask
2195          *
2196          * Take the opportunity to also log when we cannot _enable_
2197          * a given event.
2198          */
2199         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2200                 printk(TPACPI_NOTICE
2201                        "asked for hotkey mask 0x%08x, but "
2202                        "firmware forced it to 0x%08x\n",
2203                        fwmask, hotkey_acpi_mask);
2204         }
2205
2206         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2207                 hotkey_mask_warn_incomplete_mask();
2208
2209         return rc;
2210 }
2211
2212 /*
2213  * Sets hotkey_user_mask and tries to set the firmware mask
2214  *
2215  * Call with hotkey_mutex held
2216  */
2217 static int hotkey_user_mask_set(const u32 mask)
2218 {
2219         int rc;
2220
2221         /* Give people a chance to notice they are doing something that
2222          * is bound to go boom on their users sooner or later */
2223         if (!tp_warned.hotkey_mask_ff &&
2224             (mask == 0xffff || mask == 0xffffff ||
2225              mask == 0xffffffff)) {
2226                 tp_warned.hotkey_mask_ff = 1;
2227                 printk(TPACPI_NOTICE
2228                        "setting the hotkey mask to 0x%08x is likely "
2229                        "not the best way to go about it\n", mask);
2230                 printk(TPACPI_NOTICE
2231                        "please consider using the driver defaults, "
2232                        "and refer to up-to-date thinkpad-acpi "
2233                        "documentation\n");
2234         }
2235
2236         /* Try to enable what the user asked for, plus whatever we need.
2237          * this syncs everything but won't enable bits in hotkey_user_mask */
2238         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2239
2240         /* Enable the available bits in hotkey_user_mask */
2241         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2242
2243         return rc;
2244 }
2245
2246 /*
2247  * Sets the driver hotkey mask.
2248  *
2249  * Can be called even if the hotkey subdriver is inactive
2250  */
2251 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2252 {
2253         int rc;
2254
2255         /* Do the right thing if hotkey_init has not been called yet */
2256         if (!tp_features.hotkey) {
2257                 hotkey_driver_mask = mask;
2258                 return 0;
2259         }
2260
2261         mutex_lock(&hotkey_mutex);
2262
2263         HOTKEY_CONFIG_CRITICAL_START
2264         hotkey_driver_mask = mask;
2265 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2266         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2267 #endif
2268         HOTKEY_CONFIG_CRITICAL_END
2269
2270         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2271                                                         ~hotkey_source_mask);
2272         mutex_unlock(&hotkey_mutex);
2273
2274         return rc;
2275 }
2276
2277 static int hotkey_status_get(int *status)
2278 {
2279         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2280                 return -EIO;
2281
2282         return 0;
2283 }
2284
2285 static int hotkey_status_set(bool enable)
2286 {
2287         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2288                 return -EIO;
2289
2290         return 0;
2291 }
2292
2293 static void tpacpi_input_send_tabletsw(void)
2294 {
2295         int state;
2296
2297         if (tp_features.hotkey_tablet &&
2298             !hotkey_get_tablet_mode(&state)) {
2299                 mutex_lock(&tpacpi_inputdev_send_mutex);
2300
2301                 input_report_switch(tpacpi_inputdev,
2302                                     SW_TABLET_MODE, !!state);
2303                 input_sync(tpacpi_inputdev);
2304
2305                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2306         }
2307 }
2308
2309 /* Do NOT call without validating scancode first */
2310 static void tpacpi_input_send_key(const unsigned int scancode)
2311 {
2312         const unsigned int keycode = hotkey_keycode_map[scancode];
2313
2314         if (keycode != KEY_RESERVED) {
2315                 mutex_lock(&tpacpi_inputdev_send_mutex);
2316
2317                 input_report_key(tpacpi_inputdev, keycode, 1);
2318                 if (keycode == KEY_UNKNOWN)
2319                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2320                                     scancode);
2321                 input_sync(tpacpi_inputdev);
2322
2323                 input_report_key(tpacpi_inputdev, keycode, 0);
2324                 if (keycode == KEY_UNKNOWN)
2325                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2326                                     scancode);
2327                 input_sync(tpacpi_inputdev);
2328
2329                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2330         }
2331 }
2332
2333 /* Do NOT call without validating scancode first */
2334 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2335 {
2336         hotkey_driver_event(scancode);
2337         if (hotkey_user_mask & (1 << scancode))
2338                 tpacpi_input_send_key(scancode);
2339 }
2340
2341 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2342 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2343
2344 /* Do NOT call without validating scancode first */
2345 static void tpacpi_hotkey_send_key(unsigned int scancode)
2346 {
2347         tpacpi_input_send_key_masked(scancode);
2348         if (hotkey_report_mode < 2) {
2349                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2350                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2351         }
2352 }
2353
2354 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2355 {
2356         u8 d;
2357
2358         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2359                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2360                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2361                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2362                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2363                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2364         }
2365         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2366                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2367                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2368         }
2369         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2370                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2371                 n->displayexp_toggle =
2372                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2373         }
2374         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2375                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2376                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2377                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2378                 n->brightness_toggle =
2379                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2380         }
2381         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2382                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2383                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2384                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2385                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2386                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2387         }
2388 }
2389
2390 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2391                                            struct tp_nvram_state *newn,
2392                                            const u32 event_mask)
2393 {
2394
2395 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2396         do { \
2397                 if ((event_mask & (1 << __scancode)) && \
2398                     oldn->__member != newn->__member) \
2399                         tpacpi_hotkey_send_key(__scancode); \
2400         } while (0)
2401
2402 #define TPACPI_MAY_SEND_KEY(__scancode) \
2403         do { \
2404                 if (event_mask & (1 << __scancode)) \
2405                         tpacpi_hotkey_send_key(__scancode); \
2406         } while (0)
2407
2408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2411         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2412
2413         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2414
2415         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2416
2417         /* handle volume */
2418         if (oldn->volume_toggle != newn->volume_toggle) {
2419                 if (oldn->mute != newn->mute) {
2420                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2421                 }
2422                 if (oldn->volume_level > newn->volume_level) {
2423                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2424                 } else if (oldn->volume_level < newn->volume_level) {
2425                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2426                 } else if (oldn->mute == newn->mute) {
2427                         /* repeated key presses that didn't change state */
2428                         if (newn->mute) {
2429                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2430                         } else if (newn->volume_level != 0) {
2431                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2432                         } else {
2433                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2434                         }
2435                 }
2436         }
2437
2438         /* handle brightness */
2439         if (oldn->brightness_toggle != newn->brightness_toggle) {
2440                 if (oldn->brightness_level < newn->brightness_level) {
2441                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2442                 } else if (oldn->brightness_level > newn->brightness_level) {
2443                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2444                 } else {
2445                         /* repeated key presses that didn't change state */
2446                         if (newn->brightness_level != 0) {
2447                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2448                         } else {
2449                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2450                         }
2451                 }
2452         }
2453
2454 #undef TPACPI_COMPARE_KEY
2455 #undef TPACPI_MAY_SEND_KEY
2456 }
2457
2458 /*
2459  * Polling driver
2460  *
2461  * We track all events in hotkey_source_mask all the time, since
2462  * most of them are edge-based.  We only issue those requested by
2463  * hotkey_user_mask or hotkey_driver_mask, though.
2464  */
2465 static int hotkey_kthread(void *data)
2466 {
2467         struct tp_nvram_state s[2];
2468         u32 poll_mask, event_mask;
2469         unsigned int si, so;
2470         unsigned long t;
2471         unsigned int change_detector, must_reset;
2472         unsigned int poll_freq;
2473
2474         mutex_lock(&hotkey_thread_mutex);
2475
2476         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2477                 goto exit;
2478
2479         set_freezable();
2480
2481         so = 0;
2482         si = 1;
2483         t = 0;
2484
2485         /* Initial state for compares */
2486         mutex_lock(&hotkey_thread_data_mutex);
2487         change_detector = hotkey_config_change;
2488         poll_mask = hotkey_source_mask;
2489         event_mask = hotkey_source_mask &
2490                         (hotkey_driver_mask | hotkey_user_mask);
2491         poll_freq = hotkey_poll_freq;
2492         mutex_unlock(&hotkey_thread_data_mutex);
2493         hotkey_read_nvram(&s[so], poll_mask);
2494
2495         while (!kthread_should_stop()) {
2496                 if (t == 0) {
2497                         if (likely(poll_freq))
2498                                 t = 1000/poll_freq;
2499                         else
2500                                 t = 100;        /* should never happen... */
2501                 }
2502                 t = msleep_interruptible(t);
2503                 if (unlikely(kthread_should_stop()))
2504                         break;
2505                 must_reset = try_to_freeze();
2506                 if (t > 0 && !must_reset)
2507                         continue;
2508
2509                 mutex_lock(&hotkey_thread_data_mutex);
2510                 if (must_reset || hotkey_config_change != change_detector) {
2511                         /* forget old state on thaw or config change */
2512                         si = so;
2513                         t = 0;
2514                         change_detector = hotkey_config_change;
2515                 }
2516                 poll_mask = hotkey_source_mask;
2517                 event_mask = hotkey_source_mask &
2518                                 (hotkey_driver_mask | hotkey_user_mask);
2519                 poll_freq = hotkey_poll_freq;
2520                 mutex_unlock(&hotkey_thread_data_mutex);
2521
2522                 if (likely(poll_mask)) {
2523                         hotkey_read_nvram(&s[si], poll_mask);
2524                         if (likely(si != so)) {
2525                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2526                                                                 event_mask);
2527                         }
2528                 }
2529
2530                 so = si;
2531                 si ^= 1;
2532         }
2533
2534 exit:
2535         mutex_unlock(&hotkey_thread_mutex);
2536         return 0;
2537 }
2538
2539 /* call with hotkey_mutex held */
2540 static void hotkey_poll_stop_sync(void)
2541 {
2542         if (tpacpi_hotkey_task) {
2543                 if (frozen(tpacpi_hotkey_task) ||
2544                     freezing(tpacpi_hotkey_task))
2545                         thaw_process(tpacpi_hotkey_task);
2546
2547                 kthread_stop(tpacpi_hotkey_task);
2548                 tpacpi_hotkey_task = NULL;
2549                 mutex_lock(&hotkey_thread_mutex);
2550                 /* at this point, the thread did exit */
2551                 mutex_unlock(&hotkey_thread_mutex);
2552         }
2553 }
2554
2555 /* call with hotkey_mutex held */
2556 static void hotkey_poll_setup(bool may_warn)
2557 {
2558         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2559         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2560
2561         if (hotkey_poll_freq > 0 &&
2562             (poll_driver_mask ||
2563              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2564                 if (!tpacpi_hotkey_task) {
2565                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2566                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2567                         if (IS_ERR(tpacpi_hotkey_task)) {
2568                                 tpacpi_hotkey_task = NULL;
2569                                 printk(TPACPI_ERR
2570                                        "could not create kernel thread "
2571                                        "for hotkey polling\n");
2572                         }
2573                 }
2574         } else {
2575                 hotkey_poll_stop_sync();
2576                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2577                     hotkey_poll_freq == 0) {
2578                         printk(TPACPI_NOTICE
2579                                 "hot keys 0x%08x and/or events 0x%08x "
2580                                 "require polling, which is currently "
2581                                 "disabled\n",
2582                                 poll_user_mask, poll_driver_mask);
2583                 }
2584         }
2585 }
2586
2587 static void hotkey_poll_setup_safe(bool may_warn)
2588 {
2589         mutex_lock(&hotkey_mutex);
2590         hotkey_poll_setup(may_warn);
2591         mutex_unlock(&hotkey_mutex);
2592 }
2593
2594 /* call with hotkey_mutex held */
2595 static void hotkey_poll_set_freq(unsigned int freq)
2596 {
2597         if (!freq)
2598                 hotkey_poll_stop_sync();
2599
2600         hotkey_poll_freq = freq;
2601 }
2602
2603 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2604
2605 static void hotkey_poll_setup_safe(bool __unused)
2606 {
2607 }
2608
2609 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2610
2611 static int hotkey_inputdev_open(struct input_dev *dev)
2612 {
2613         switch (tpacpi_lifecycle) {
2614         case TPACPI_LIFE_INIT:
2615                 /*
2616                  * hotkey_init will call hotkey_poll_setup_safe
2617                  * at the appropriate moment
2618                  */
2619                 return 0;
2620         case TPACPI_LIFE_EXITING:
2621                 return -EBUSY;
2622         case TPACPI_LIFE_RUNNING:
2623                 hotkey_poll_setup_safe(false);
2624                 return 0;
2625         }
2626
2627         /* Should only happen if tpacpi_lifecycle is corrupt */
2628         BUG();
2629         return -EBUSY;
2630 }
2631
2632 static void hotkey_inputdev_close(struct input_dev *dev)
2633 {
2634         /* disable hotkey polling when possible */
2635         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2636             !(hotkey_source_mask & hotkey_driver_mask))
2637                 hotkey_poll_setup_safe(false);
2638 }
2639
2640 /* sysfs hotkey enable ------------------------------------------------- */
2641 static ssize_t hotkey_enable_show(struct device *dev,
2642                            struct device_attribute *attr,
2643                            char *buf)
2644 {
2645         int res, status;
2646
2647         printk_deprecated_attribute("hotkey_enable",
2648                         "Hotkey reporting is always enabled");
2649
2650         res = hotkey_status_get(&status);
2651         if (res)
2652                 return res;
2653
2654         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2655 }
2656
2657 static ssize_t hotkey_enable_store(struct device *dev,
2658                             struct device_attribute *attr,
2659                             const char *buf, size_t count)
2660 {
2661         unsigned long t;
2662
2663         printk_deprecated_attribute("hotkey_enable",
2664                         "Hotkeys can be disabled through hotkey_mask");
2665
2666         if (parse_strtoul(buf, 1, &t))
2667                 return -EINVAL;
2668
2669         if (t == 0)
2670                 return -EPERM;
2671
2672         return count;
2673 }
2674
2675 static struct device_attribute dev_attr_hotkey_enable =
2676         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2677                 hotkey_enable_show, hotkey_enable_store);
2678
2679 /* sysfs hotkey mask --------------------------------------------------- */
2680 static ssize_t hotkey_mask_show(struct device *dev,
2681                            struct device_attribute *attr,
2682                            char *buf)
2683 {
2684         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2685 }
2686
2687 static ssize_t hotkey_mask_store(struct device *dev,
2688                             struct device_attribute *attr,
2689                             const char *buf, size_t count)
2690 {
2691         unsigned long t;
2692         int res;
2693
2694         if (parse_strtoul(buf, 0xffffffffUL, &t))
2695                 return -EINVAL;
2696
2697         if (mutex_lock_killable(&hotkey_mutex))
2698                 return -ERESTARTSYS;
2699
2700         res = hotkey_user_mask_set(t);
2701
2702 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2703         hotkey_poll_setup(true);
2704 #endif
2705
2706         mutex_unlock(&hotkey_mutex);
2707
2708         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2709
2710         return (res) ? res : count;
2711 }
2712
2713 static struct device_attribute dev_attr_hotkey_mask =
2714         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2715                 hotkey_mask_show, hotkey_mask_store);
2716
2717 /* sysfs hotkey bios_enabled ------------------------------------------- */
2718 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2719                            struct device_attribute *attr,
2720                            char *buf)
2721 {
2722         return sprintf(buf, "0\n");
2723 }
2724
2725 static struct device_attribute dev_attr_hotkey_bios_enabled =
2726         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2727
2728 /* sysfs hotkey bios_mask ---------------------------------------------- */
2729 static ssize_t hotkey_bios_mask_show(struct device *dev,
2730                            struct device_attribute *attr,
2731                            char *buf)
2732 {
2733         printk_deprecated_attribute("hotkey_bios_mask",
2734                         "This attribute is useless.");
2735         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2736 }
2737
2738 static struct device_attribute dev_attr_hotkey_bios_mask =
2739         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2740
2741 /* sysfs hotkey all_mask ----------------------------------------------- */
2742 static ssize_t hotkey_all_mask_show(struct device *dev,
2743                            struct device_attribute *attr,
2744                            char *buf)
2745 {
2746         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2747                                 hotkey_all_mask | hotkey_source_mask);
2748 }
2749
2750 static struct device_attribute dev_attr_hotkey_all_mask =
2751         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2752
2753 /* sysfs hotkey recommended_mask --------------------------------------- */
2754 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2755                                             struct device_attribute *attr,
2756                                             char *buf)
2757 {
2758         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2759                         (hotkey_all_mask | hotkey_source_mask)
2760                         & ~hotkey_reserved_mask);
2761 }
2762
2763 static struct device_attribute dev_attr_hotkey_recommended_mask =
2764         __ATTR(hotkey_recommended_mask, S_IRUGO,
2765                 hotkey_recommended_mask_show, NULL);
2766
2767 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2768
2769 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2770 static ssize_t hotkey_source_mask_show(struct device *dev,
2771                            struct device_attribute *attr,
2772                            char *buf)
2773 {
2774         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2775 }
2776
2777 static ssize_t hotkey_source_mask_store(struct device *dev,
2778                             struct device_attribute *attr,
2779                             const char *buf, size_t count)
2780 {
2781         unsigned long t;
2782         u32 r_ev;
2783         int rc;
2784
2785         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2786                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2787                 return -EINVAL;
2788
2789         if (mutex_lock_killable(&hotkey_mutex))
2790                 return -ERESTARTSYS;
2791
2792         HOTKEY_CONFIG_CRITICAL_START
2793         hotkey_source_mask = t;
2794         HOTKEY_CONFIG_CRITICAL_END
2795
2796         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2797                         ~hotkey_source_mask);
2798         hotkey_poll_setup(true);
2799
2800         /* check if events needed by the driver got disabled */
2801         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2802                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2803
2804         mutex_unlock(&hotkey_mutex);
2805
2806         if (rc < 0)
2807                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2808                         "firmware event mask!\n");
2809
2810         if (r_ev)
2811                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2812                         "some important events were disabled: "
2813                         "0x%04x\n", r_ev);
2814
2815         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2816
2817         return (rc < 0) ? rc : count;
2818 }
2819
2820 static struct device_attribute dev_attr_hotkey_source_mask =
2821         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2822                 hotkey_source_mask_show, hotkey_source_mask_store);
2823
2824 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2825 static ssize_t hotkey_poll_freq_show(struct device *dev,
2826                            struct device_attribute *attr,
2827                            char *buf)
2828 {
2829         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2830 }
2831
2832 static ssize_t hotkey_poll_freq_store(struct device *dev,
2833                             struct device_attribute *attr,
2834                             const char *buf, size_t count)
2835 {
2836         unsigned long t;
2837
2838         if (parse_strtoul(buf, 25, &t))
2839                 return -EINVAL;
2840
2841         if (mutex_lock_killable(&hotkey_mutex))
2842                 return -ERESTARTSYS;
2843
2844         hotkey_poll_set_freq(t);
2845         hotkey_poll_setup(true);
2846
2847         mutex_unlock(&hotkey_mutex);
2848
2849         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2850
2851         return count;
2852 }
2853
2854 static struct device_attribute dev_attr_hotkey_poll_freq =
2855         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2856                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2857
2858 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2859
2860 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2861 static ssize_t hotkey_radio_sw_show(struct device *dev,
2862                            struct device_attribute *attr,
2863                            char *buf)
2864 {
2865         int res;
2866         res = hotkey_get_wlsw();
2867         if (res < 0)
2868                 return res;
2869
2870         /* Opportunistic update */
2871         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2872
2873         return snprintf(buf, PAGE_SIZE, "%d\n",
2874                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2875 }
2876
2877 static struct device_attribute dev_attr_hotkey_radio_sw =
2878         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2879
2880 static void hotkey_radio_sw_notify_change(void)
2881 {
2882         if (tp_features.hotkey_wlsw)
2883                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2884                              "hotkey_radio_sw");
2885 }
2886
2887 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2888 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2889                            struct device_attribute *attr,
2890                            char *buf)
2891 {
2892         int res, s;
2893         res = hotkey_get_tablet_mode(&s);
2894         if (res < 0)
2895                 return res;
2896
2897         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2898 }
2899
2900 static struct device_attribute dev_attr_hotkey_tablet_mode =
2901         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2902
2903 static void hotkey_tablet_mode_notify_change(void)
2904 {
2905         if (tp_features.hotkey_tablet)
2906                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2907                              "hotkey_tablet_mode");
2908 }
2909
2910 /* sysfs hotkey report_mode -------------------------------------------- */
2911 static ssize_t hotkey_report_mode_show(struct device *dev,
2912                            struct device_attribute *attr,
2913                            char *buf)
2914 {
2915         return snprintf(buf, PAGE_SIZE, "%d\n",
2916                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2917 }
2918
2919 static struct device_attribute dev_attr_hotkey_report_mode =
2920         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2921
2922 /* sysfs wakeup reason (pollable) -------------------------------------- */
2923 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2924                            struct device_attribute *attr,
2925                            char *buf)
2926 {
2927         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2928 }
2929
2930 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2931         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2932
2933 static void hotkey_wakeup_reason_notify_change(void)
2934 {
2935         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2936                      "wakeup_reason");
2937 }
2938
2939 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2940 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2941                            struct device_attribute *attr,
2942                            char *buf)
2943 {
2944         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2945 }
2946
2947 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2948         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2949                hotkey_wakeup_hotunplug_complete_show, NULL);
2950
2951 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2952 {
2953         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2954                      "wakeup_hotunplug_complete");
2955 }
2956
2957 /* --------------------------------------------------------------------- */
2958
2959 static struct attribute *hotkey_attributes[] __initdata = {
2960         &dev_attr_hotkey_enable.attr,
2961         &dev_attr_hotkey_bios_enabled.attr,
2962         &dev_attr_hotkey_bios_mask.attr,
2963         &dev_attr_hotkey_report_mode.attr,
2964         &dev_attr_hotkey_wakeup_reason.attr,
2965         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2966         &dev_attr_hotkey_mask.attr,
2967         &dev_attr_hotkey_all_mask.attr,
2968         &dev_attr_hotkey_recommended_mask.attr,
2969 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2970         &dev_attr_hotkey_source_mask.attr,
2971         &dev_attr_hotkey_poll_freq.attr,
2972 #endif
2973 };
2974
2975 /*
2976  * Sync both the hw and sw blocking state of all switches
2977  */
2978 static void tpacpi_send_radiosw_update(void)
2979 {
2980         int wlsw;
2981
2982         /*
2983          * We must sync all rfkill controllers *before* issuing any
2984          * rfkill input events, or we will race the rfkill core input
2985          * handler.
2986          *
2987          * tpacpi_inputdev_send_mutex works as a syncronization point
2988          * for the above.
2989          *
2990          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2991          */
2992
2993         wlsw = hotkey_get_wlsw();
2994
2995         /* Sync hw blocking state first if it is hw-blocked */
2996         if (wlsw == TPACPI_RFK_RADIO_OFF)
2997                 tpacpi_rfk_update_hwblock_state(true);
2998
2999         /* Sync sw blocking state */
3000         tpacpi_rfk_update_swstate_all();
3001
3002         /* Sync hw blocking state last if it is hw-unblocked */
3003         if (wlsw == TPACPI_RFK_RADIO_ON)
3004                 tpacpi_rfk_update_hwblock_state(false);
3005
3006         /* Issue rfkill input event for WLSW switch */
3007         if (!(wlsw < 0)) {
3008                 mutex_lock(&tpacpi_inputdev_send_mutex);
3009
3010                 input_report_switch(tpacpi_inputdev,
3011                                     SW_RFKILL_ALL, (wlsw > 0));
3012                 input_sync(tpacpi_inputdev);
3013
3014                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3015         }
3016
3017         /*
3018          * this can be unconditional, as we will poll state again
3019          * if userspace uses the notify to read data
3020          */
3021         hotkey_radio_sw_notify_change();
3022 }
3023
3024 static void hotkey_exit(void)
3025 {
3026 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3027         mutex_lock(&hotkey_mutex);
3028         hotkey_poll_stop_sync();
3029         mutex_unlock(&hotkey_mutex);
3030 #endif
3031
3032         if (hotkey_dev_attributes)
3033                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3034
3035         kfree(hotkey_keycode_map);
3036
3037         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3038                    "restoring original HKEY status and mask\n");
3039         /* yes, there is a bitwise or below, we want the
3040          * functions to be called even if one of them fail */
3041         if (((tp_features.hotkey_mask &&
3042               hotkey_mask_set(hotkey_orig_mask)) |
3043              hotkey_status_set(false)) != 0)
3044                 printk(TPACPI_ERR
3045                        "failed to restore hot key mask "
3046                        "to BIOS defaults\n");
3047 }
3048
3049 static void __init hotkey_unmap(const unsigned int scancode)
3050 {
3051         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3052                 clear_bit(hotkey_keycode_map[scancode],
3053                           tpacpi_inputdev->keybit);
3054                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3055         }
3056 }
3057
3058 /*
3059  * HKEY quirks:
3060  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3061  */
3062
3063 #define TPACPI_HK_Q_INIMASK     0x0001
3064
3065 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3066         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3067         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3068         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3069         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3070         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3071         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3072         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3073         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3074         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3075         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3076         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3077         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3078         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3079         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3080         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3081         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3082         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3083         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3084         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3085 };
3086
3087 static int __init hotkey_init(struct ibm_init_struct *iibm)
3088 {
3089         /* Requirements for changing the default keymaps:
3090          *
3091          * 1. Many of the keys are mapped to KEY_RESERVED for very
3092          *    good reasons.  Do not change them unless you have deep
3093          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3094          *    the various ThinkPad models.  The driver behaves
3095          *    differently for KEY_RESERVED: such keys have their
3096          *    hot key mask *unset* in mask_recommended, and also
3097          *    in the initial hot key mask programmed into the
3098          *    firmware at driver load time, which means the firm-
3099          *    ware may react very differently if you change them to
3100          *    something else;
3101          *
3102          * 2. You must be subscribed to the linux-thinkpad and
3103          *    ibm-acpi-devel mailing lists, and you should read the
3104          *    list archives since 2007 if you want to change the
3105          *    keymaps.  This requirement exists so that you will
3106          *    know the past history of problems with the thinkpad-
3107          *    acpi driver keymaps, and also that you will be
3108          *    listening to any bug reports;
3109          *
3110          * 3. Do not send thinkpad-acpi specific patches directly to
3111          *    for merging, *ever*.  Send them to the linux-acpi
3112          *    mailinglist for comments.  Merging is to be done only
3113          *    through acpi-test and the ACPI maintainer.
3114          *
3115          * If the above is too much to ask, don't change the keymap.
3116          * Ask the thinkpad-acpi maintainer to do it, instead.
3117          */
3118         static u16 ibm_keycode_map[] __initdata = {
3119                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3120                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3121                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3122                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3123
3124                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3125                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3126                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3127                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3128
3129                 /* brightness: firmware always reacts to them */
3130                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3131                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3132
3133                 /* Thinklight: firmware always react to it */
3134                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3135
3136                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3137                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3138
3139                 /* Volume: firmware always react to it and reprograms
3140                  * the built-in *extra* mixer.  Never map it to control
3141                  * another mixer by default. */
3142                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3143                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3144                 KEY_RESERVED,   /* 0x16: MUTE */
3145
3146                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3147
3148                 /* (assignments unknown, please report if found) */
3149                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3150                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3151         };
3152         static u16 lenovo_keycode_map[] __initdata = {
3153                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3154                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3155                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3156                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3157
3158                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3159                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3160                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3161                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3162
3163                 /* These should be enabled --only-- when ACPI video
3164                  * is disabled (i.e. in "vendor" mode), and are handled
3165                  * in a special way by the init code */
3166                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3167                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3168
3169                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3170
3171                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3172                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3173
3174                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3175                  * react to it and reprograms the built-in *extra* mixer.
3176                  * Never map it to control another mixer by default.
3177                  *
3178                  * T60?, T61, R60?, R61: firmware and EC tries to send
3179                  * these over the regular keyboard, so these are no-ops,
3180                  * but there are still weird bugs re. MUTE, so do not
3181                  * change unless you get test reports from all Lenovo
3182                  * models.  May cause the BIOS to interfere with the
3183                  * HDA mixer.
3184                  */
3185                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3186                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3187                 KEY_RESERVED,   /* 0x16: MUTE */
3188
3189                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3190
3191                 /* (assignments unknown, please report if found) */
3192                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3193                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3194         };
3195
3196 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3197 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3198 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3199
3200         int res, i;
3201         int status;
3202         int hkeyv;
3203         bool radiosw_state  = false;
3204         bool tabletsw_state = false;
3205
3206         unsigned long quirks;
3207
3208         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3209                         "initializing hotkey subdriver\n");
3210
3211         BUG_ON(!tpacpi_inputdev);
3212         BUG_ON(tpacpi_inputdev->open != NULL ||
3213                tpacpi_inputdev->close != NULL);
3214
3215         TPACPI_ACPIHANDLE_INIT(hkey);
3216         mutex_init(&hotkey_mutex);
3217
3218 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3219         mutex_init(&hotkey_thread_mutex);
3220         mutex_init(&hotkey_thread_data_mutex);
3221 #endif
3222
3223         /* hotkey not supported on 570 */
3224         tp_features.hotkey = hkey_handle != NULL;
3225
3226         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3227                 "hotkeys are %s\n",
3228                 str_supported(tp_features.hotkey));
3229
3230         if (!tp_features.hotkey)
3231                 return 1;
3232
3233         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3234                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3235
3236         tpacpi_disable_brightness_delay();
3237
3238         /* MUST have enough space for all attributes to be added to
3239          * hotkey_dev_attributes */
3240         hotkey_dev_attributes = create_attr_set(
3241                                         ARRAY_SIZE(hotkey_attributes) + 2,
3242                                         NULL);
3243         if (!hotkey_dev_attributes)
3244                 return -ENOMEM;
3245         res = add_many_to_attr_set(hotkey_dev_attributes,
3246                         hotkey_attributes,
3247                         ARRAY_SIZE(hotkey_attributes));
3248         if (res)
3249                 goto err_exit;
3250
3251         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3252            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3253            for HKEY interface version 0x100 */
3254         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3255                 if ((hkeyv >> 8) != 1) {
3256                         printk(TPACPI_ERR "unknown version of the "
3257                                "HKEY interface: 0x%x\n", hkeyv);
3258                         printk(TPACPI_ERR "please report this to %s\n",
3259                                TPACPI_MAIL);
3260                 } else {
3261                         /*
3262                          * MHKV 0x100 in A31, R40, R40e,
3263                          * T4x, X31, and later
3264                          */
3265                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3266                                 "firmware HKEY interface version: 0x%x\n",
3267                                 hkeyv);
3268
3269                         /* Paranoia check AND init hotkey_all_mask */
3270                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3271                                         "MHKA", "qd")) {
3272                                 printk(TPACPI_ERR
3273                                        "missing MHKA handler, "
3274                                        "please report this to %s\n",
3275                                        TPACPI_MAIL);
3276                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3277                                 hotkey_all_mask = 0x080cU;
3278                         } else {
3279                                 tp_features.hotkey_mask = 1;
3280                         }
3281                 }
3282         }
3283
3284         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3285                 "hotkey masks are %s\n",
3286                 str_supported(tp_features.hotkey_mask));
3287
3288         /* Init hotkey_all_mask if not initialized yet */
3289         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3290             (quirks & TPACPI_HK_Q_INIMASK))
3291                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3292
3293         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3294         if (tp_features.hotkey_mask) {
3295                 /* hotkey_source_mask *must* be zero for
3296                  * the first hotkey_mask_get to return hotkey_orig_mask */
3297                 res = hotkey_mask_get();
3298                 if (res)
3299                         goto err_exit;
3300
3301                 hotkey_orig_mask = hotkey_acpi_mask;
3302         } else {
3303                 hotkey_orig_mask = hotkey_all_mask;
3304                 hotkey_acpi_mask = hotkey_all_mask;
3305         }
3306
3307 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3308         if (dbg_wlswemul) {
3309                 tp_features.hotkey_wlsw = 1;
3310                 radiosw_state = !!tpacpi_wlsw_emulstate;
3311                 printk(TPACPI_INFO
3312                         "radio switch emulation enabled\n");
3313         } else
3314 #endif
3315         /* Not all thinkpads have a hardware radio switch */
3316         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3317                 tp_features.hotkey_wlsw = 1;
3318                 radiosw_state = !!status;
3319                 printk(TPACPI_INFO
3320                         "radio switch found; radios are %s\n",
3321                         enabled(status, 0));
3322         }
3323         if (tp_features.hotkey_wlsw)
3324                 res = add_to_attr_set(hotkey_dev_attributes,
3325                                 &dev_attr_hotkey_radio_sw.attr);
3326
3327         /* For X41t, X60t, X61t Tablets... */
3328         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3329                 tp_features.hotkey_tablet = 1;
3330                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3331                 printk(TPACPI_INFO
3332                         "possible tablet mode switch found; "
3333                         "ThinkPad in %s mode\n",
3334                         (tabletsw_state) ? "tablet" : "laptop");
3335                 res = add_to_attr_set(hotkey_dev_attributes,
3336                                 &dev_attr_hotkey_tablet_mode.attr);
3337         }
3338
3339         if (!res)
3340                 res = register_attr_set_with_sysfs(
3341                                 hotkey_dev_attributes,
3342                                 &tpacpi_pdev->dev.kobj);
3343         if (res)
3344                 goto err_exit;
3345
3346         /* Set up key map */
3347
3348         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3349                                         GFP_KERNEL);
3350         if (!hotkey_keycode_map) {
3351                 printk(TPACPI_ERR
3352                         "failed to allocate memory for key map\n");
3353                 res = -ENOMEM;
3354                 goto err_exit;
3355         }
3356
3357         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3358                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3359                            "using Lenovo default hot key map\n");
3360                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3361                         TPACPI_HOTKEY_MAP_SIZE);
3362         } else {
3363                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3364                            "using IBM default hot key map\n");
3365                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3366                         TPACPI_HOTKEY_MAP_SIZE);
3367         }
3368
3369         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3370         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3371         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3372         tpacpi_inputdev->keycode = hotkey_keycode_map;
3373         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3374                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3375                         input_set_capability(tpacpi_inputdev, EV_KEY,
3376                                                 hotkey_keycode_map[i]);
3377                 } else {
3378                         if (i < sizeof(hotkey_reserved_mask)*8)
3379                                 hotkey_reserved_mask |= 1 << i;
3380                 }
3381         }
3382
3383         if (tp_features.hotkey_wlsw) {
3384                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3385                 input_report_switch(tpacpi_inputdev,
3386                                     SW_RFKILL_ALL, radiosw_state);
3387         }
3388         if (tp_features.hotkey_tablet) {
3389                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3390                 input_report_switch(tpacpi_inputdev,
3391                                     SW_TABLET_MODE, tabletsw_state);
3392         }
3393
3394         /* Do not issue duplicate brightness change events to
3395          * userspace */
3396         if (!tp_features.bright_acpimode)
3397                 /* update bright_acpimode... */
3398                 tpacpi_check_std_acpi_brightness_support();
3399
3400         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3401                 printk(TPACPI_INFO
3402                        "This ThinkPad has standard ACPI backlight "
3403                        "brightness control, supported by the ACPI "
3404                        "video driver\n");
3405                 printk(TPACPI_NOTICE
3406                        "Disabling thinkpad-acpi brightness events "
3407                        "by default...\n");
3408
3409                 /* Disable brightness up/down on Lenovo thinkpads when
3410                  * ACPI is handling them, otherwise it is plain impossible
3411                  * for userspace to do something even remotely sane */
3412                 hotkey_reserved_mask |=
3413                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3414                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3415                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3416                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3417         }
3418
3419 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3420         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3421                                 & ~hotkey_all_mask
3422                                 & ~hotkey_reserved_mask;
3423
3424         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3425                     "hotkey source mask 0x%08x, polling freq %u\n",
3426                     hotkey_source_mask, hotkey_poll_freq);
3427 #endif
3428
3429         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3430                         "enabling firmware HKEY event interface...\n");
3431         res = hotkey_status_set(true);
3432         if (res) {
3433                 hotkey_exit();
3434                 return res;
3435         }
3436         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3437                                | hotkey_driver_mask)
3438                               & ~hotkey_source_mask);
3439         if (res < 0 && res != -ENXIO) {
3440                 hotkey_exit();
3441                 return res;
3442         }
3443         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3444                                 & ~hotkey_reserved_mask;
3445         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3446                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3447                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3448
3449         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3450                         "legacy ibm/hotkey event reporting over procfs %s\n",
3451                         (hotkey_report_mode < 2) ?
3452                                 "enabled" : "disabled");
3453
3454         tpacpi_inputdev->open = &hotkey_inputdev_open;
3455         tpacpi_inputdev->close = &hotkey_inputdev_close;
3456
3457         hotkey_poll_setup_safe(true);
3458
3459         return 0;
3460
3461 err_exit:
3462         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3463         hotkey_dev_attributes = NULL;
3464
3465         return (res < 0)? res : 1;
3466 }
3467
3468 static bool hotkey_notify_hotkey(const u32 hkey,
3469                                  bool *send_acpi_ev,
3470                                  bool *ignore_acpi_ev)
3471 {
3472         /* 0x1000-0x1FFF: key presses */
3473         unsigned int scancode = hkey & 0xfff;
3474         *send_acpi_ev = true;
3475         *ignore_acpi_ev = false;
3476
3477         if (scancode > 0 && scancode < 0x21) {
3478                 scancode--;
3479                 if (!(hotkey_source_mask & (1 << scancode))) {
3480                         tpacpi_input_send_key_masked(scancode);
3481                         *send_acpi_ev = false;
3482                 } else {
3483                         *ignore_acpi_ev = true;
3484                 }
3485                 return true;
3486         }
3487         return false;
3488 }
3489
3490 static bool hotkey_notify_wakeup(const u32 hkey,
3491                                  bool *send_acpi_ev,
3492                                  bool *ignore_acpi_ev)
3493 {
3494         /* 0x2000-0x2FFF: Wakeup reason */
3495         *send_acpi_ev = true;
3496         *ignore_acpi_ev = false;
3497
3498         switch (hkey) {
3499         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3500         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3501                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3502                 *ignore_acpi_ev = true;
3503                 break;
3504
3505         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3506         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3507                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3508                 *ignore_acpi_ev = true;
3509                 break;
3510
3511         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3512         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3513                 printk(TPACPI_ALERT
3514                         "EMERGENCY WAKEUP: battery almost empty\n");
3515                 /* how to auto-heal: */
3516                 /* 2313: woke up from S3, go to S4/S5 */
3517                 /* 2413: woke up from S4, go to S5 */
3518                 break;
3519
3520         default:
3521                 return false;
3522         }
3523
3524         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3525                 printk(TPACPI_INFO
3526                        "woke up due to a hot-unplug "
3527                        "request...\n");
3528                 hotkey_wakeup_reason_notify_change();
3529         }
3530         return true;
3531 }
3532
3533 static bool hotkey_notify_usrevent(const u32 hkey,
3534                                  bool *send_acpi_ev,
3535                                  bool *ignore_acpi_ev)
3536 {
3537         /* 0x5000-0x5FFF: human interface helpers */
3538         *send_acpi_ev = true;
3539         *ignore_acpi_ev = false;
3540
3541         switch (hkey) {
3542         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3543         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3544                 return true;
3545
3546         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3547         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3548                 tpacpi_input_send_tabletsw();
3549                 hotkey_tablet_mode_notify_change();
3550                 *send_acpi_ev = false;
3551                 return true;
3552
3553         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3554         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3555         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3556                 /* do not propagate these events */
3557                 *ignore_acpi_ev = true;
3558                 return true;
3559
3560         default:
3561                 return false;
3562         }
3563 }
3564
3565 static void thermal_dump_all_sensors(void);
3566
3567 static bool hotkey_notify_thermal(const u32 hkey,
3568                                  bool *send_acpi_ev,
3569                                  bool *ignore_acpi_ev)
3570 {
3571         bool known = true;
3572
3573         /* 0x6000-0x6FFF: thermal alarms */
3574         *send_acpi_ev = true;
3575         *ignore_acpi_ev = false;
3576
3577         switch (hkey) {
3578         case TP_HKEY_EV_THM_TABLE_CHANGED:
3579                 printk(TPACPI_INFO
3580                         "EC reports that Thermal Table has changed\n");
3581                 /* recommended action: do nothing, we don't have
3582                  * Lenovo ATM information */
3583                 return true;
3584         case TP_HKEY_EV_ALARM_BAT_HOT:
3585                 printk(TPACPI_CRIT
3586                         "THERMAL ALARM: battery is too hot!\n");
3587                 /* recommended action: warn user through gui */
3588                 break;
3589         case TP_HKEY_EV_ALARM_BAT_XHOT:
3590                 printk(TPACPI_ALERT
3591                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3592                 /* recommended action: immediate sleep/hibernate */
3593                 break;
3594         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3595                 printk(TPACPI_CRIT
3596                         "THERMAL ALARM: "
3597                         "a sensor reports something is too hot!\n");
3598                 /* recommended action: warn user through gui, that */
3599                 /* some internal component is too hot */
3600                 break;
3601         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3602                 printk(TPACPI_ALERT
3603                         "THERMAL EMERGENCY: "
3604                         "a sensor reports something is extremely hot!\n");
3605                 /* recommended action: immediate sleep/hibernate */
3606                 break;
3607         default:
3608                 printk(TPACPI_ALERT
3609                          "THERMAL ALERT: unknown thermal alarm received\n");
3610                 known = false;
3611         }
3612
3613         thermal_dump_all_sensors();
3614
3615         return known;
3616 }
3617
3618 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3619 {
3620         u32 hkey;
3621         bool send_acpi_ev;
3622         bool ignore_acpi_ev;
3623         bool known_ev;
3624
3625         if (event != 0x80) {
3626                 printk(TPACPI_ERR
3627                        "unknown HKEY notification event %d\n", event);
3628                 /* forward it to userspace, maybe it knows how to handle it */
3629                 acpi_bus_generate_netlink_event(
3630                                         ibm->acpi->device->pnp.device_class,
3631                                         dev_name(&ibm->acpi->device->dev),
3632                                         event, 0);
3633                 return;
3634         }
3635
3636         while (1) {
3637                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3638                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3639                         return;
3640                 }
3641
3642                 if (hkey == 0) {
3643                         /* queue empty */
3644                         return;
3645                 }
3646
3647                 send_acpi_ev = true;
3648                 ignore_acpi_ev = false;
3649
3650                 switch (hkey >> 12) {
3651                 case 1:
3652                         /* 0x1000-0x1FFF: key presses */
3653                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3654                                                  &ignore_acpi_ev);
3655                         break;
3656                 case 2:
3657                         /* 0x2000-0x2FFF: Wakeup reason */
3658                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3659                                                  &ignore_acpi_ev);
3660                         break;
3661                 case 3:
3662                         /* 0x3000-0x3FFF: bay-related wakeups */
3663                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3664                                 hotkey_autosleep_ack = 1;
3665                                 printk(TPACPI_INFO
3666                                        "bay ejected\n");
3667                                 hotkey_wakeup_hotunplug_complete_notify_change();
3668                                 known_ev = true;
3669                         } else {
3670                                 known_ev = false;
3671                         }
3672                         break;
3673                 case 4:
3674                         /* 0x4000-0x4FFF: dock-related wakeups */
3675                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3676                                 hotkey_autosleep_ack = 1;
3677                                 printk(TPACPI_INFO
3678                                        "undocked\n");
3679                                 hotkey_wakeup_hotunplug_complete_notify_change();
3680                                 known_ev = true;
3681                         } else {
3682                                 known_ev = false;
3683                         }
3684                         break;
3685                 case 5:
3686                         /* 0x5000-0x5FFF: human interface helpers */
3687                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3688                                                  &ignore_acpi_ev);
3689                         break;
3690                 case 6:
3691                         /* 0x6000-0x6FFF: thermal alarms */
3692                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3693                                                  &ignore_acpi_ev);
3694                         break;
3695                 case 7:
3696                         /* 0x7000-0x7FFF: misc */
3697                         if (tp_features.hotkey_wlsw &&
3698                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3699                                 tpacpi_send_radiosw_update();
3700                                 send_acpi_ev = 0;
3701                                 known_ev = true;
3702                                 break;
3703                         }
3704                         /* fallthrough to default */
3705                 default:
3706                         known_ev = false;
3707                 }
3708                 if (!known_ev) {
3709                         printk(TPACPI_NOTICE
3710                                "unhandled HKEY event 0x%04x\n", hkey);
3711                         printk(TPACPI_NOTICE
3712                                "please report the conditions when this "
3713                                "event happened to %s\n", TPACPI_MAIL);
3714                 }
3715
3716                 /* Legacy events */
3717                 if (!ignore_acpi_ev &&
3718                     (send_acpi_ev || hotkey_report_mode < 2)) {
3719                         acpi_bus_generate_proc_event(ibm->acpi->device,
3720                                                      event, hkey);
3721                 }
3722
3723                 /* netlink events */
3724                 if (!ignore_acpi_ev && send_acpi_ev) {
3725                         acpi_bus_generate_netlink_event(
3726                                         ibm->acpi->device->pnp.device_class,
3727                                         dev_name(&ibm->acpi->device->dev),
3728                                         event, hkey);
3729                 }
3730         }
3731 }
3732
3733 static void hotkey_suspend(pm_message_t state)
3734 {
3735         /* Do these on suspend, we get the events on early resume! */
3736         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3737         hotkey_autosleep_ack = 0;
3738 }
3739
3740 static void hotkey_resume(void)
3741 {
3742         tpacpi_disable_brightness_delay();
3743
3744         if (hotkey_status_set(true) < 0 ||
3745             hotkey_mask_set(hotkey_acpi_mask) < 0)
3746                 printk(TPACPI_ERR
3747                        "error while attempting to reset the event "
3748                        "firmware interface\n");
3749
3750         tpacpi_send_radiosw_update();
3751         hotkey_tablet_mode_notify_change();
3752         hotkey_wakeup_reason_notify_change();
3753         hotkey_wakeup_hotunplug_complete_notify_change();
3754         hotkey_poll_setup_safe(false);
3755 }
3756
3757 /* procfs -------------------------------------------------------------- */
3758 static int hotkey_read(char *p)
3759 {
3760         int res, status;
3761         int len = 0;
3762
3763         if (!tp_features.hotkey) {
3764                 len += sprintf(p + len, "status:\t\tnot supported\n");
3765                 return len;
3766         }
3767
3768         if (mutex_lock_killable(&hotkey_mutex))
3769                 return -ERESTARTSYS;
3770         res = hotkey_status_get(&status);
3771         if (!res)
3772                 res = hotkey_mask_get();
3773         mutex_unlock(&hotkey_mutex);
3774         if (res)
3775                 return res;
3776
3777         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3778         if (hotkey_all_mask) {
3779                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_user_mask);
3780                 len += sprintf(p + len,
3781                                "commands:\tenable, disable, reset, <mask>\n");
3782         } else {
3783                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3784                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3785         }
3786
3787         return len;
3788 }
3789
3790 static void hotkey_enabledisable_warn(bool enable)
3791 {
3792         tpacpi_log_usertask("procfs hotkey enable/disable");
3793         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3794                         TPACPI_WARN
3795                         "hotkey enable/disable functionality has been "
3796                         "removed from the driver.  Hotkeys are always "
3797                         "enabled\n"))
3798                 printk(TPACPI_ERR
3799                         "Please remove the hotkey=enable module "
3800                         "parameter, it is deprecated.  Hotkeys are always "
3801                         "enabled\n");
3802 }
3803
3804 static int hotkey_write(char *buf)
3805 {
3806         int res;
3807         u32 mask;
3808         char *cmd;
3809
3810         if (!tp_features.hotkey)
3811                 return -ENODEV;
3812
3813         if (mutex_lock_killable(&hotkey_mutex))
3814                 return -ERESTARTSYS;
3815
3816         mask = hotkey_user_mask;
3817
3818         res = 0;
3819         while ((cmd = next_cmd(&buf))) {
3820                 if (strlencmp(cmd, "enable") == 0) {
3821                         hotkey_enabledisable_warn(1);
3822                 } else if (strlencmp(cmd, "disable") == 0) {
3823                         hotkey_enabledisable_warn(0);
3824                         res = -EPERM;
3825                 } else if (strlencmp(cmd, "reset") == 0) {
3826                         mask = (hotkey_all_mask | hotkey_source_mask)
3827                                 & ~hotkey_reserved_mask;
3828                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3829                         /* mask set */
3830                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3831                         /* mask set */
3832                 } else {
3833                         res = -EINVAL;
3834                         goto errexit;
3835                 }
3836         }
3837
3838         if (!res) {
3839                 tpacpi_disclose_usertask("procfs hotkey",
3840                         "set mask to 0x%08x\n", mask);
3841                 res = hotkey_user_mask_set(mask);
3842         }
3843
3844 errexit:
3845         mutex_unlock(&hotkey_mutex);
3846         return res;
3847 }
3848
3849 static const struct acpi_device_id ibm_htk_device_ids[] = {
3850         {TPACPI_ACPI_HKEY_HID, 0},
3851         {"", 0},
3852 };
3853
3854 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3855         .hid = ibm_htk_device_ids,
3856         .notify = hotkey_notify,
3857         .handle = &hkey_handle,
3858         .type = ACPI_DEVICE_NOTIFY,
3859 };
3860
3861 static struct ibm_struct hotkey_driver_data = {
3862         .name = "hotkey",
3863         .read = hotkey_read,
3864         .write = hotkey_write,
3865         .exit = hotkey_exit,
3866         .resume = hotkey_resume,
3867         .suspend = hotkey_suspend,
3868         .acpi = &ibm_hotkey_acpidriver,
3869 };
3870
3871 /*************************************************************************
3872  * Bluetooth subdriver
3873  */
3874
3875 enum {
3876         /* ACPI GBDC/SBDC bits */
3877         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3878         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3879         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3880                                                    off / last state */
3881 };
3882
3883 enum {
3884         /* ACPI \BLTH commands */
3885         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3886         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3887         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3888         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3889         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3890 };
3891
3892 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3893
3894 static int bluetooth_get_status(void)
3895 {
3896         int status;
3897
3898 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3899         if (dbg_bluetoothemul)
3900                 return (tpacpi_bluetooth_emulstate) ?
3901                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3902 #endif
3903
3904         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3905                 return -EIO;
3906
3907         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3908                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3909 }
3910
3911 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3912 {
3913         int status;
3914
3915         vdbg_printk(TPACPI_DBG_RFKILL,
3916                 "will attempt to %s bluetooth\n",
3917                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3918
3919 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3920         if (dbg_bluetoothemul) {
3921                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3922                 return 0;
3923         }
3924 #endif
3925
3926         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3927         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3928         if (state == TPACPI_RFK_RADIO_ON)
3929                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3930
3931         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3932                 return -EIO;
3933
3934         return 0;
3935 }
3936
3937 /* sysfs bluetooth enable ---------------------------------------------- */
3938 static ssize_t bluetooth_enable_show(struct device *dev,
3939                            struct device_attribute *attr,
3940                            char *buf)
3941 {
3942         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3943                         attr, buf);
3944 }
3945
3946 static ssize_t bluetooth_enable_store(struct device *dev,
3947                             struct device_attribute *attr,
3948                             const char *buf, size_t count)
3949 {
3950         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3951                                 attr, buf, count);
3952 }
3953
3954 static struct device_attribute dev_attr_bluetooth_enable =
3955         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3956                 bluetooth_enable_show, bluetooth_enable_store);
3957
3958 /* --------------------------------------------------------------------- */
3959
3960 static struct attribute *bluetooth_attributes[] = {
3961         &dev_attr_bluetooth_enable.attr,
3962         NULL
3963 };
3964
3965 static const struct attribute_group bluetooth_attr_group = {
3966         .attrs = bluetooth_attributes,
3967 };
3968
3969 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3970         .get_status = bluetooth_get_status,
3971         .set_status = bluetooth_set_status,
3972 };
3973
3974 static void bluetooth_shutdown(void)
3975 {
3976         /* Order firmware to save current state to NVRAM */
3977         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3978                         TP_ACPI_BLTH_SAVE_STATE))
3979                 printk(TPACPI_NOTICE
3980                         "failed to save bluetooth state to NVRAM\n");
3981         else
3982                 vdbg_printk(TPACPI_DBG_RFKILL,
3983                         "bluestooth state saved to NVRAM\n");
3984 }
3985
3986 static void bluetooth_exit(void)
3987 {
3988         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3989                         &bluetooth_attr_group);
3990
3991         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3992
3993         bluetooth_shutdown();
3994 }
3995
3996 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3997 {
3998         int res;
3999         int status = 0;
4000
4001         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4002                         "initializing bluetooth subdriver\n");
4003
4004         TPACPI_ACPIHANDLE_INIT(hkey);
4005
4006         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4007            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4008         tp_features.bluetooth = hkey_handle &&
4009             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4010
4011         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4012                 "bluetooth is %s, status 0x%02x\n",
4013                 str_supported(tp_features.bluetooth),
4014                 status);
4015
4016 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4017         if (dbg_bluetoothemul) {
4018                 tp_features.bluetooth = 1;
4019                 printk(TPACPI_INFO
4020                         "bluetooth switch emulation enabled\n");
4021         } else
4022 #endif
4023         if (tp_features.bluetooth &&
4024             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4025                 /* no bluetooth hardware present in system */
4026                 tp_features.bluetooth = 0;
4027                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4028                            "bluetooth hardware not installed\n");
4029         }
4030
4031         if (!tp_features.bluetooth)
4032                 return 1;
4033
4034         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4035                                 &bluetooth_tprfk_ops,
4036                                 RFKILL_TYPE_BLUETOOTH,
4037                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4038                                 true);
4039         if (res)
4040                 return res;
4041
4042         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4043                                 &bluetooth_attr_group);
4044         if (res) {
4045                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4046                 return res;
4047         }
4048
4049         return 0;
4050 }
4051
4052 /* procfs -------------------------------------------------------------- */
4053 static int bluetooth_read(char *p)
4054 {
4055         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
4056 }
4057
4058 static int bluetooth_write(char *buf)
4059 {
4060         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4061 }
4062
4063 static struct ibm_struct bluetooth_driver_data = {
4064         .name = "bluetooth",
4065         .read = bluetooth_read,
4066         .write = bluetooth_write,
4067         .exit = bluetooth_exit,
4068         .shutdown = bluetooth_shutdown,
4069 };
4070
4071 /*************************************************************************
4072  * Wan subdriver
4073  */
4074
4075 enum {
4076         /* ACPI GWAN/SWAN bits */
4077         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4078         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4079         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4080                                                    off / last state */
4081 };
4082
4083 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4084
4085 static int wan_get_status(void)
4086 {
4087         int status;
4088
4089 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4090         if (dbg_wwanemul)
4091                 return (tpacpi_wwan_emulstate) ?
4092                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4093 #endif
4094
4095         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4096                 return -EIO;
4097
4098         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4099                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4100 }
4101
4102 static int wan_set_status(enum tpacpi_rfkill_state state)
4103 {
4104         int status;
4105
4106         vdbg_printk(TPACPI_DBG_RFKILL,
4107                 "will attempt to %s wwan\n",
4108                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4109
4110 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4111         if (dbg_wwanemul) {
4112                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4113                 return 0;
4114         }
4115 #endif
4116
4117         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4118         status = TP_ACPI_WANCARD_RESUMECTRL;
4119         if (state == TPACPI_RFK_RADIO_ON)
4120                 status |= TP_ACPI_WANCARD_RADIOSSW;
4121
4122         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4123                 return -EIO;
4124
4125         return 0;
4126 }
4127
4128 /* sysfs wan enable ---------------------------------------------------- */
4129 static ssize_t wan_enable_show(struct device *dev,
4130                            struct device_attribute *attr,
4131                            char *buf)
4132 {
4133         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4134                         attr, buf);
4135 }
4136
4137 static ssize_t wan_enable_store(struct device *dev,
4138                             struct device_attribute *attr,
4139                             const char *buf, size_t count)
4140 {
4141         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4142                         attr, buf, count);
4143 }
4144
4145 static struct device_attribute dev_attr_wan_enable =
4146         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4147                 wan_enable_show, wan_enable_store);
4148
4149 /* --------------------------------------------------------------------- */
4150
4151 static struct attribute *wan_attributes[] = {
4152         &dev_attr_wan_enable.attr,
4153         NULL
4154 };
4155
4156 static const struct attribute_group wan_attr_group = {
4157         .attrs = wan_attributes,
4158 };
4159
4160 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4161         .get_status = wan_get_status,
4162         .set_status = wan_set_status,
4163 };
4164
4165 static void wan_shutdown(void)
4166 {
4167         /* Order firmware to save current state to NVRAM */
4168         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4169                         TP_ACPI_WGSV_SAVE_STATE))
4170                 printk(TPACPI_NOTICE
4171                         "failed to save WWAN state to NVRAM\n");
4172         else
4173                 vdbg_printk(TPACPI_DBG_RFKILL,
4174                         "WWAN state saved to NVRAM\n");
4175 }
4176
4177 static void wan_exit(void)
4178 {
4179         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4180                 &wan_attr_group);
4181
4182         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4183
4184         wan_shutdown();
4185 }
4186
4187 static int __init wan_init(struct ibm_init_struct *iibm)
4188 {
4189         int res;
4190         int status = 0;
4191
4192         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4193                         "initializing wan subdriver\n");
4194
4195         TPACPI_ACPIHANDLE_INIT(hkey);
4196
4197         tp_features.wan = hkey_handle &&
4198             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4199
4200         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4201                 "wan is %s, status 0x%02x\n",
4202                 str_supported(tp_features.wan),
4203                 status);
4204
4205 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4206         if (dbg_wwanemul) {
4207                 tp_features.wan = 1;
4208                 printk(TPACPI_INFO
4209                         "wwan switch emulation enabled\n");
4210         } else
4211 #endif
4212         if (tp_features.wan &&
4213             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4214                 /* no wan hardware present in system */
4215                 tp_features.wan = 0;
4216                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4217                            "wan hardware not installed\n");
4218         }
4219
4220         if (!tp_features.wan)
4221                 return 1;
4222
4223         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4224                                 &wan_tprfk_ops,
4225                                 RFKILL_TYPE_WWAN,
4226                                 TPACPI_RFK_WWAN_SW_NAME,
4227                                 true);
4228         if (res)
4229                 return res;
4230
4231         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4232                                 &wan_attr_group);
4233
4234         if (res) {
4235                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4236                 return res;
4237         }
4238
4239         return 0;
4240 }
4241
4242 /* procfs -------------------------------------------------------------- */
4243 static int wan_read(char *p)
4244 {
4245         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4246 }
4247
4248 static int wan_write(char *buf)
4249 {
4250         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4251 }
4252
4253 static struct ibm_struct wan_driver_data = {
4254         .name = "wan",
4255         .read = wan_read,
4256         .write = wan_write,
4257         .exit = wan_exit,
4258         .shutdown = wan_shutdown,
4259 };
4260
4261 /*************************************************************************
4262  * UWB subdriver
4263  */
4264
4265 enum {
4266         /* ACPI GUWB/SUWB bits */
4267         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4268         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4269 };
4270
4271 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4272
4273 static int uwb_get_status(void)
4274 {
4275         int status;
4276
4277 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4278         if (dbg_uwbemul)
4279                 return (tpacpi_uwb_emulstate) ?
4280                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4281 #endif
4282
4283         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4284                 return -EIO;
4285
4286         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4287                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4288 }
4289
4290 static int uwb_set_status(enum tpacpi_rfkill_state state)
4291 {
4292         int status;
4293
4294         vdbg_printk(TPACPI_DBG_RFKILL,
4295                 "will attempt to %s UWB\n",
4296                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4297
4298 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4299         if (dbg_uwbemul) {
4300                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4301                 return 0;
4302         }
4303 #endif
4304
4305         if (state == TPACPI_RFK_RADIO_ON)
4306                 status = TP_ACPI_UWB_RADIOSSW;
4307         else
4308                 status = 0;
4309
4310         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4311                 return -EIO;
4312
4313         return 0;
4314 }
4315
4316 /* --------------------------------------------------------------------- */
4317
4318 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4319         .get_status = uwb_get_status,
4320         .set_status = uwb_set_status,
4321 };
4322
4323 static void uwb_exit(void)
4324 {
4325         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4326 }
4327
4328 static int __init uwb_init(struct ibm_init_struct *iibm)
4329 {
4330         int res;
4331         int status = 0;
4332
4333         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4334                         "initializing uwb subdriver\n");
4335
4336         TPACPI_ACPIHANDLE_INIT(hkey);
4337
4338         tp_features.uwb = hkey_handle &&
4339             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4340
4341         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4342                 "uwb is %s, status 0x%02x\n",
4343                 str_supported(tp_features.uwb),
4344                 status);
4345
4346 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4347         if (dbg_uwbemul) {
4348                 tp_features.uwb = 1;
4349                 printk(TPACPI_INFO
4350                         "uwb switch emulation enabled\n");
4351         } else
4352 #endif
4353         if (tp_features.uwb &&
4354             !(status & TP_ACPI_UWB_HWPRESENT)) {
4355                 /* no uwb hardware present in system */
4356                 tp_features.uwb = 0;
4357                 dbg_printk(TPACPI_DBG_INIT,
4358                            "uwb hardware not installed\n");
4359         }
4360
4361         if (!tp_features.uwb)
4362                 return 1;
4363
4364         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4365                                 &uwb_tprfk_ops,
4366                                 RFKILL_TYPE_UWB,
4367                                 TPACPI_RFK_UWB_SW_NAME,
4368                                 false);
4369         return res;
4370 }
4371
4372 static struct ibm_struct uwb_driver_data = {
4373         .name = "uwb",
4374         .exit = uwb_exit,
4375         .flags.experimental = 1,
4376 };
4377
4378 /*************************************************************************
4379  * Video subdriver
4380  */
4381
4382 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4383
4384 enum video_access_mode {
4385         TPACPI_VIDEO_NONE = 0,
4386         TPACPI_VIDEO_570,       /* 570 */
4387         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4388         TPACPI_VIDEO_NEW,       /* all others */
4389 };
4390
4391 enum {  /* video status flags, based on VIDEO_570 */
4392         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4393         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4394         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4395 };
4396
4397 enum {  /* TPACPI_VIDEO_570 constants */
4398         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4399         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4400                                                  * video_status_flags */
4401         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4402         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4403 };
4404
4405 static enum video_access_mode video_supported;
4406 static int video_orig_autosw;
4407
4408 static int video_autosw_get(void);
4409 static int video_autosw_set(int enable);
4410
4411 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4412
4413 static int __init video_init(struct ibm_init_struct *iibm)
4414 {
4415         int ivga;
4416
4417         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4418
4419         TPACPI_ACPIHANDLE_INIT(vid);
4420         TPACPI_ACPIHANDLE_INIT(vid2);
4421
4422         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4423                 /* G41, assume IVGA doesn't change */
4424                 vid_handle = vid2_handle;
4425
4426         if (!vid_handle)
4427                 /* video switching not supported on R30, R31 */
4428                 video_supported = TPACPI_VIDEO_NONE;
4429         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4430                 /* 570 */
4431                 video_supported = TPACPI_VIDEO_570;
4432         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4433                 /* 600e/x, 770e, 770x */
4434                 video_supported = TPACPI_VIDEO_770;
4435         else
4436                 /* all others */
4437                 video_supported = TPACPI_VIDEO_NEW;
4438
4439         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4440                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4441                 video_supported);
4442
4443         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4444 }
4445
4446 static void video_exit(void)
4447 {
4448         dbg_printk(TPACPI_DBG_EXIT,
4449                    "restoring original video autoswitch mode\n");
4450         if (video_autosw_set(video_orig_autosw))
4451                 printk(TPACPI_ERR "error while trying to restore original "
4452                         "video autoswitch mode\n");
4453 }
4454
4455 static int video_outputsw_get(void)
4456 {
4457         int status = 0;
4458         int i;
4459
4460         switch (video_supported) {
4461         case TPACPI_VIDEO_570:
4462                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4463                                  TP_ACPI_VIDEO_570_PHSCMD))
4464                         return -EIO;
4465                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4466                 break;
4467         case TPACPI_VIDEO_770:
4468                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4469                         return -EIO;
4470                 if (i)
4471                         status |= TP_ACPI_VIDEO_S_LCD;
4472                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4473                         return -EIO;
4474                 if (i)
4475                         status |= TP_ACPI_VIDEO_S_CRT;
4476                 break;
4477         case TPACPI_VIDEO_NEW:
4478                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4479                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4480                         return -EIO;
4481                 if (i)
4482                         status |= TP_ACPI_VIDEO_S_CRT;
4483
4484                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4485                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4486                         return -EIO;
4487                 if (i)
4488                         status |= TP_ACPI_VIDEO_S_LCD;
4489                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4490                         return -EIO;
4491                 if (i)
4492                         status |= TP_ACPI_VIDEO_S_DVI;
4493                 break;
4494         default:
4495                 return -ENOSYS;
4496         }
4497
4498         return status;
4499 }
4500
4501 static int video_outputsw_set(int status)
4502 {
4503         int autosw;
4504         int res = 0;
4505
4506         switch (video_supported) {
4507         case TPACPI_VIDEO_570:
4508                 res = acpi_evalf(NULL, NULL,
4509                                  "\\_SB.PHS2", "vdd",
4510                                  TP_ACPI_VIDEO_570_PHS2CMD,
4511                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4512                 break;
4513         case TPACPI_VIDEO_770:
4514                 autosw = video_autosw_get();
4515                 if (autosw < 0)
4516                         return autosw;
4517
4518                 res = video_autosw_set(1);
4519                 if (res)
4520                         return res;
4521                 res = acpi_evalf(vid_handle, NULL,
4522                                  "ASWT", "vdd", status * 0x100, 0);
4523                 if (!autosw && video_autosw_set(autosw)) {
4524                         printk(TPACPI_ERR
4525                                "video auto-switch left enabled due to error\n");
4526                         return -EIO;
4527                 }
4528                 break;
4529         case TPACPI_VIDEO_NEW:
4530                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4531                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4532                 break;
4533         default:
4534                 return -ENOSYS;
4535         }
4536
4537         return (res)? 0 : -EIO;
4538 }
4539
4540 static int video_autosw_get(void)
4541 {
4542         int autosw = 0;
4543
4544         switch (video_supported) {
4545         case TPACPI_VIDEO_570:
4546                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4547                         return -EIO;
4548                 break;
4549         case TPACPI_VIDEO_770:
4550         case TPACPI_VIDEO_NEW:
4551                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4552                         return -EIO;
4553                 break;
4554         default:
4555                 return -ENOSYS;
4556         }
4557
4558         return autosw & 1;
4559 }
4560
4561 static int video_autosw_set(int enable)
4562 {
4563         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4564                 return -EIO;
4565         return 0;
4566 }
4567
4568 static int video_outputsw_cycle(void)
4569 {
4570         int autosw = video_autosw_get();
4571         int res;
4572
4573         if (autosw < 0)
4574                 return autosw;
4575
4576         switch (video_supported) {
4577         case TPACPI_VIDEO_570:
4578                 res = video_autosw_set(1);
4579                 if (res)
4580                         return res;
4581                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4582                 break;
4583         case TPACPI_VIDEO_770:
4584         case TPACPI_VIDEO_NEW:
4585                 res = video_autosw_set(1);
4586                 if (res)
4587                         return res;
4588                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4589                 break;
4590         default:
4591                 return -ENOSYS;
4592         }
4593         if (!autosw && video_autosw_set(autosw)) {
4594                 printk(TPACPI_ERR
4595                        "video auto-switch left enabled due to error\n");
4596                 return -EIO;
4597         }
4598
4599         return (res)? 0 : -EIO;
4600 }
4601
4602 static int video_expand_toggle(void)
4603 {
4604         switch (video_supported) {
4605         case TPACPI_VIDEO_570:
4606                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4607                         0 : -EIO;
4608         case TPACPI_VIDEO_770:
4609                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4610                         0 : -EIO;
4611         case TPACPI_VIDEO_NEW:
4612                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4613                         0 : -EIO;
4614         default:
4615                 return -ENOSYS;
4616         }
4617         /* not reached */
4618 }
4619
4620 static int video_read(char *p)
4621 {
4622         int status, autosw;
4623         int len = 0;
4624
4625         if (video_supported == TPACPI_VIDEO_NONE) {
4626                 len += sprintf(p + len, "status:\t\tnot supported\n");
4627                 return len;
4628         }
4629
4630         status = video_outputsw_get();
4631         if (status < 0)
4632                 return status;
4633
4634         autosw = video_autosw_get();
4635         if (autosw < 0)
4636                 return autosw;
4637
4638         len += sprintf(p + len, "status:\t\tsupported\n");
4639         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4640         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4641         if (video_supported == TPACPI_VIDEO_NEW)
4642                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4643         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4644         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4645         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4646         if (video_supported == TPACPI_VIDEO_NEW)
4647                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4648         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4649         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4650
4651         return len;
4652 }
4653
4654 static int video_write(char *buf)
4655 {
4656         char *cmd;
4657         int enable, disable, status;
4658         int res;
4659
4660         if (video_supported == TPACPI_VIDEO_NONE)
4661                 return -ENODEV;
4662
4663         enable = 0;
4664         disable = 0;
4665
4666         while ((cmd = next_cmd(&buf))) {
4667                 if (strlencmp(cmd, "lcd_enable") == 0) {
4668                         enable |= TP_ACPI_VIDEO_S_LCD;
4669                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4670                         disable |= TP_ACPI_VIDEO_S_LCD;
4671                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4672                         enable |= TP_ACPI_VIDEO_S_CRT;
4673                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4674                         disable |= TP_ACPI_VIDEO_S_CRT;
4675                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4676                            strlencmp(cmd, "dvi_enable") == 0) {
4677                         enable |= TP_ACPI_VIDEO_S_DVI;
4678                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4679                            strlencmp(cmd, "dvi_disable") == 0) {
4680                         disable |= TP_ACPI_VIDEO_S_DVI;
4681                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4682                         res = video_autosw_set(1);
4683                         if (res)
4684                                 return res;
4685                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4686                         res = video_autosw_set(0);
4687                         if (res)
4688                                 return res;
4689                 } else if (strlencmp(cmd, "video_switch") == 0) {
4690                         res = video_outputsw_cycle();
4691                         if (res)
4692                                 return res;
4693                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4694                         res = video_expand_toggle();
4695                         if (res)
4696                                 return res;
4697                 } else
4698                         return -EINVAL;
4699         }
4700
4701         if (enable || disable) {
4702                 status = video_outputsw_get();
4703                 if (status < 0)
4704                         return status;
4705                 res = video_outputsw_set((status & ~disable) | enable);
4706                 if (res)
4707                         return res;
4708         }
4709
4710         return 0;
4711 }
4712
4713 static struct ibm_struct video_driver_data = {
4714         .name = "video",
4715         .read = video_read,
4716         .write = video_write,
4717         .exit = video_exit,
4718 };
4719
4720 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4721
4722 /*************************************************************************
4723  * Light (thinklight) subdriver
4724  */
4725
4726 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4727 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4728
4729 static int light_get_status(void)
4730 {
4731         int status = 0;
4732
4733         if (tp_features.light_status) {
4734                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4735                         return -EIO;
4736                 return (!!status);
4737         }
4738
4739         return -ENXIO;
4740 }
4741
4742 static int light_set_status(int status)
4743 {
4744         int rc;
4745
4746         if (tp_features.light) {
4747                 if (cmos_handle) {
4748                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4749                                         (status)?
4750                                                 TP_CMOS_THINKLIGHT_ON :
4751                                                 TP_CMOS_THINKLIGHT_OFF);
4752                 } else {
4753                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4754                                         (status)? 1 : 0);
4755                 }
4756                 return (rc)? 0 : -EIO;
4757         }
4758
4759         return -ENXIO;
4760 }
4761
4762 static void light_set_status_worker(struct work_struct *work)
4763 {
4764         struct tpacpi_led_classdev *data =
4765                         container_of(work, struct tpacpi_led_classdev, work);
4766
4767         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4768                 light_set_status((data->new_state != TPACPI_LED_OFF));
4769 }
4770
4771 static void light_sysfs_set(struct led_classdev *led_cdev,
4772                         enum led_brightness brightness)
4773 {
4774         struct tpacpi_led_classdev *data =
4775                 container_of(led_cdev,
4776                              struct tpacpi_led_classdev,
4777                              led_classdev);
4778         data->new_state = (brightness != LED_OFF) ?
4779                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4780         queue_work(tpacpi_wq, &data->work);
4781 }
4782
4783 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4784 {
4785         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4786 }
4787
4788 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4789         .led_classdev = {
4790                 .name           = "tpacpi::thinklight",
4791                 .brightness_set = &light_sysfs_set,
4792                 .brightness_get = &light_sysfs_get,
4793         }
4794 };
4795
4796 static int __init light_init(struct ibm_init_struct *iibm)
4797 {
4798         int rc;
4799
4800         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4801
4802         TPACPI_ACPIHANDLE_INIT(ledb);
4803         TPACPI_ACPIHANDLE_INIT(lght);
4804         TPACPI_ACPIHANDLE_INIT(cmos);
4805         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4806
4807         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4808         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4809
4810         if (tp_features.light)
4811                 /* light status not supported on
4812                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4813                 tp_features.light_status =
4814                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4815
4816         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4817                 str_supported(tp_features.light),
4818                 str_supported(tp_features.light_status));
4819
4820         if (!tp_features.light)
4821                 return 1;
4822
4823         rc = led_classdev_register(&tpacpi_pdev->dev,
4824                                    &tpacpi_led_thinklight.led_classdev);
4825
4826         if (rc < 0) {
4827                 tp_features.light = 0;
4828                 tp_features.light_status = 0;
4829         } else  {
4830                 rc = 0;
4831         }
4832
4833         return rc;
4834 }
4835
4836 static void light_exit(void)
4837 {
4838         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4839         if (work_pending(&tpacpi_led_thinklight.work))
4840                 flush_workqueue(tpacpi_wq);
4841 }
4842
4843 static int light_read(char *p)
4844 {
4845         int len = 0;
4846         int status;
4847
4848         if (!tp_features.light) {
4849                 len += sprintf(p + len, "status:\t\tnot supported\n");
4850         } else if (!tp_features.light_status) {
4851                 len += sprintf(p + len, "status:\t\tunknown\n");
4852                 len += sprintf(p + len, "commands:\ton, off\n");
4853         } else {
4854                 status = light_get_status();
4855                 if (status < 0)
4856                         return status;
4857                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4858                 len += sprintf(p + len, "commands:\ton, off\n");
4859         }
4860
4861         return len;
4862 }
4863
4864 static int light_write(char *buf)
4865 {
4866         char *cmd;
4867         int newstatus = 0;
4868
4869         if (!tp_features.light)
4870                 return -ENODEV;
4871
4872         while ((cmd = next_cmd(&buf))) {
4873                 if (strlencmp(cmd, "on") == 0) {
4874                         newstatus = 1;
4875                 } else if (strlencmp(cmd, "off") == 0) {
4876                         newstatus = 0;
4877                 } else
4878                         return -EINVAL;
4879         }
4880
4881         return light_set_status(newstatus);
4882 }
4883
4884 static struct ibm_struct light_driver_data = {
4885         .name = "light",
4886         .read = light_read,
4887         .write = light_write,
4888         .exit = light_exit,
4889 };
4890
4891 /*************************************************************************
4892  * CMOS subdriver
4893  */
4894
4895 /* sysfs cmos_command -------------------------------------------------- */
4896 static ssize_t cmos_command_store(struct device *dev,
4897                             struct device_attribute *attr,
4898                             const char *buf, size_t count)
4899 {
4900         unsigned long cmos_cmd;
4901         int res;
4902
4903         if (parse_strtoul(buf, 21, &cmos_cmd))
4904                 return -EINVAL;
4905
4906         res = issue_thinkpad_cmos_command(cmos_cmd);
4907         return (res)? res : count;
4908 }
4909
4910 static struct device_attribute dev_attr_cmos_command =
4911         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4912
4913 /* --------------------------------------------------------------------- */
4914
4915 static int __init cmos_init(struct ibm_init_struct *iibm)
4916 {
4917         int res;
4918
4919         vdbg_printk(TPACPI_DBG_INIT,
4920                 "initializing cmos commands subdriver\n");
4921
4922         TPACPI_ACPIHANDLE_INIT(cmos);
4923
4924         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4925                 str_supported(cmos_handle != NULL));
4926
4927         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4928         if (res)
4929                 return res;
4930
4931         return (cmos_handle)? 0 : 1;
4932 }
4933
4934 static void cmos_exit(void)
4935 {
4936         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4937 }
4938
4939 static int cmos_read(char *p)
4940 {
4941         int len = 0;
4942
4943         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4944            R30, R31, T20-22, X20-21 */
4945         if (!cmos_handle)
4946                 len += sprintf(p + len, "status:\t\tnot supported\n");
4947         else {
4948                 len += sprintf(p + len, "status:\t\tsupported\n");
4949                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4950         }
4951
4952         return len;
4953 }
4954
4955 static int cmos_write(char *buf)
4956 {
4957         char *cmd;
4958         int cmos_cmd, res;
4959
4960         while ((cmd = next_cmd(&buf))) {
4961                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4962                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4963                         /* cmos_cmd set */
4964                 } else
4965                         return -EINVAL;
4966
4967                 res = issue_thinkpad_cmos_command(cmos_cmd);
4968                 if (res)
4969                         return res;
4970         }
4971
4972         return 0;
4973 }
4974
4975 static struct ibm_struct cmos_driver_data = {
4976         .name = "cmos",
4977         .read = cmos_read,
4978         .write = cmos_write,
4979         .exit = cmos_exit,
4980 };
4981
4982 /*************************************************************************
4983  * LED subdriver
4984  */
4985
4986 enum led_access_mode {
4987         TPACPI_LED_NONE = 0,
4988         TPACPI_LED_570, /* 570 */
4989         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4990         TPACPI_LED_NEW, /* all others */
4991 };
4992
4993 enum {  /* For TPACPI_LED_OLD */
4994         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4995         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4996         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4997 };
4998
4999 static enum led_access_mode led_supported;
5000
5001 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
5002            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
5003                                 /* T20-22, X20-21 */
5004            "LED",               /* all others */
5005            );                   /* R30, R31 */
5006
5007 #define TPACPI_LED_NUMLEDS 16
5008 static struct tpacpi_led_classdev *tpacpi_leds;
5009 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5010 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5011         /* there's a limit of 19 chars + NULL before 2.6.26 */
5012         "tpacpi::power",
5013         "tpacpi:orange:batt",
5014         "tpacpi:green:batt",
5015         "tpacpi::dock_active",
5016         "tpacpi::bay_active",
5017         "tpacpi::dock_batt",
5018         "tpacpi::unknown_led",
5019         "tpacpi::standby",
5020         "tpacpi::dock_status1",
5021         "tpacpi::dock_status2",
5022         "tpacpi::unknown_led2",
5023         "tpacpi::unknown_led3",
5024         "tpacpi::thinkvantage",
5025 };
5026 #define TPACPI_SAFE_LEDS        0x1081U
5027
5028 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5029 {
5030 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5031         return false;
5032 #else
5033         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5034 #endif
5035 }
5036
5037 static int led_get_status(const unsigned int led)
5038 {
5039         int status;
5040         enum led_status_t led_s;
5041
5042         switch (led_supported) {
5043         case TPACPI_LED_570:
5044                 if (!acpi_evalf(ec_handle,
5045                                 &status, "GLED", "dd", 1 << led))
5046                         return -EIO;
5047                 led_s = (status == 0)?
5048                                 TPACPI_LED_OFF :
5049                                 ((status == 1)?
5050                                         TPACPI_LED_ON :
5051                                         TPACPI_LED_BLINK);
5052                 tpacpi_led_state_cache[led] = led_s;
5053                 return led_s;
5054         default:
5055                 return -ENXIO;
5056         }
5057
5058         /* not reached */
5059 }
5060
5061 static int led_set_status(const unsigned int led,
5062                           const enum led_status_t ledstatus)
5063 {
5064         /* off, on, blink. Index is led_status_t */
5065         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5066         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5067
5068         int rc = 0;
5069
5070         switch (led_supported) {
5071         case TPACPI_LED_570:
5072                 /* 570 */
5073                 if (unlikely(led > 7))
5074                         return -EINVAL;
5075                 if (unlikely(tpacpi_is_led_restricted(led)))
5076                         return -EPERM;
5077                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5078                                 (1 << led), led_sled_arg1[ledstatus]))
5079                         rc = -EIO;
5080                 break;
5081         case TPACPI_LED_OLD:
5082                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5083                 if (unlikely(led > 7))
5084                         return -EINVAL;
5085                 if (unlikely(tpacpi_is_led_restricted(led)))
5086                         return -EPERM;
5087                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5088                 if (rc >= 0)
5089                         rc = ec_write(TPACPI_LED_EC_HLBL,
5090                                       (ledstatus == TPACPI_LED_BLINK) << led);
5091                 if (rc >= 0)
5092                         rc = ec_write(TPACPI_LED_EC_HLCL,
5093                                       (ledstatus != TPACPI_LED_OFF) << led);
5094                 break;
5095         case TPACPI_LED_NEW:
5096                 /* all others */
5097                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5098                         return -EINVAL;
5099                 if (unlikely(tpacpi_is_led_restricted(led)))
5100                         return -EPERM;
5101                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5102                                 led, led_led_arg1[ledstatus]))
5103                         rc = -EIO;
5104                 break;
5105         default:
5106                 rc = -ENXIO;
5107         }
5108
5109         if (!rc)
5110                 tpacpi_led_state_cache[led] = ledstatus;
5111
5112         return rc;
5113 }
5114
5115 static void led_set_status_worker(struct work_struct *work)
5116 {
5117         struct tpacpi_led_classdev *data =
5118                 container_of(work, struct tpacpi_led_classdev, work);
5119
5120         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5121                 led_set_status(data->led, data->new_state);
5122 }
5123
5124 static void led_sysfs_set(struct led_classdev *led_cdev,
5125                         enum led_brightness brightness)
5126 {
5127         struct tpacpi_led_classdev *data = container_of(led_cdev,
5128                              struct tpacpi_led_classdev, led_classdev);
5129
5130         if (brightness == LED_OFF)
5131                 data->new_state = TPACPI_LED_OFF;
5132         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5133                 data->new_state = TPACPI_LED_ON;
5134         else
5135                 data->new_state = TPACPI_LED_BLINK;
5136
5137         queue_work(tpacpi_wq, &data->work);
5138 }
5139
5140 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5141                         unsigned long *delay_on, unsigned long *delay_off)
5142 {
5143         struct tpacpi_led_classdev *data = container_of(led_cdev,
5144                              struct tpacpi_led_classdev, led_classdev);
5145
5146         /* Can we choose the flash rate? */
5147         if (*delay_on == 0 && *delay_off == 0) {
5148                 /* yes. set them to the hardware blink rate (1 Hz) */
5149                 *delay_on = 500; /* ms */
5150                 *delay_off = 500; /* ms */
5151         } else if ((*delay_on != 500) || (*delay_off != 500))
5152                 return -EINVAL;
5153
5154         data->new_state = TPACPI_LED_BLINK;
5155         queue_work(tpacpi_wq, &data->work);
5156
5157         return 0;
5158 }
5159
5160 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5161 {
5162         int rc;
5163
5164         struct tpacpi_led_classdev *data = container_of(led_cdev,
5165                              struct tpacpi_led_classdev, led_classdev);
5166
5167         rc = led_get_status(data->led);
5168
5169         if (rc == TPACPI_LED_OFF || rc < 0)
5170                 rc = LED_OFF;   /* no error handling in led class :( */
5171         else
5172                 rc = LED_FULL;
5173
5174         return rc;
5175 }
5176
5177 static void led_exit(void)
5178 {
5179         unsigned int i;
5180
5181         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5182                 if (tpacpi_leds[i].led_classdev.name)
5183                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5184         }
5185
5186         kfree(tpacpi_leds);
5187 }
5188
5189 static int __init tpacpi_init_led(unsigned int led)
5190 {
5191         int rc;
5192
5193         tpacpi_leds[led].led = led;
5194
5195         /* LEDs with no name don't get registered */
5196         if (!tpacpi_led_names[led])
5197                 return 0;
5198
5199         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5200         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5201         if (led_supported == TPACPI_LED_570)
5202                 tpacpi_leds[led].led_classdev.brightness_get =
5203                                                 &led_sysfs_get;
5204
5205         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5206
5207         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5208
5209         rc = led_classdev_register(&tpacpi_pdev->dev,
5210                                 &tpacpi_leds[led].led_classdev);
5211         if (rc < 0)
5212                 tpacpi_leds[led].led_classdev.name = NULL;
5213
5214         return rc;
5215 }
5216
5217 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5218         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5219         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5220         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5221
5222         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5223         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5224         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5225         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5226         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5227         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5228         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5229         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5230
5231         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5232         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5233         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5234         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5235         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5236
5237         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5238         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5239         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5240         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5241
5242         /* (1) - may have excess leds enabled on MSB */
5243
5244         /* Defaults (order matters, keep last, don't reorder!) */
5245         { /* Lenovo */
5246           .vendor = PCI_VENDOR_ID_LENOVO,
5247           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5248           .quirks = 0x1fffU,
5249         },
5250         { /* IBM ThinkPads with no EC version string */
5251           .vendor = PCI_VENDOR_ID_IBM,
5252           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5253           .quirks = 0x00ffU,
5254         },
5255         { /* IBM ThinkPads with EC version string */
5256           .vendor = PCI_VENDOR_ID_IBM,
5257           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5258           .quirks = 0x00bfU,
5259         },
5260 };
5261
5262 #undef TPACPI_LEDQ_IBM
5263 #undef TPACPI_LEDQ_LNV
5264
5265 static int __init led_init(struct ibm_init_struct *iibm)
5266 {
5267         unsigned int i;
5268         int rc;
5269         unsigned long useful_leds;
5270
5271         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5272
5273         TPACPI_ACPIHANDLE_INIT(led);
5274
5275         if (!led_handle)
5276                 /* led not supported on R30, R31 */
5277                 led_supported = TPACPI_LED_NONE;
5278         else if (strlencmp(led_path, "SLED") == 0)
5279                 /* 570 */
5280                 led_supported = TPACPI_LED_570;
5281         else if (strlencmp(led_path, "SYSL") == 0)
5282                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5283                 led_supported = TPACPI_LED_OLD;
5284         else
5285                 /* all others */
5286                 led_supported = TPACPI_LED_NEW;
5287
5288         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5289                 str_supported(led_supported), led_supported);
5290
5291         if (led_supported == TPACPI_LED_NONE)
5292                 return 1;
5293
5294         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5295                               GFP_KERNEL);
5296         if (!tpacpi_leds) {
5297                 printk(TPACPI_ERR "Out of memory for LED data\n");
5298                 return -ENOMEM;
5299         }
5300
5301         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5302                                           ARRAY_SIZE(led_useful_qtable));
5303
5304         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5305                 if (!tpacpi_is_led_restricted(i) &&
5306                     test_bit(i, &useful_leds)) {
5307                         rc = tpacpi_init_led(i);
5308                         if (rc < 0) {
5309                                 led_exit();
5310                                 return rc;
5311                         }
5312                 }
5313         }
5314
5315 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5316         printk(TPACPI_NOTICE
5317                 "warning: userspace override of important "
5318                 "firmware LEDs is enabled\n");
5319 #endif
5320         return 0;
5321 }
5322
5323 #define str_led_status(s) \
5324         ((s) == TPACPI_LED_OFF ? "off" : \
5325                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5326
5327 static int led_read(char *p)
5328 {
5329         int len = 0;
5330
5331         if (!led_supported) {
5332                 len += sprintf(p + len, "status:\t\tnot supported\n");
5333                 return len;
5334         }
5335         len += sprintf(p + len, "status:\t\tsupported\n");
5336
5337         if (led_supported == TPACPI_LED_570) {
5338                 /* 570 */
5339                 int i, status;
5340                 for (i = 0; i < 8; i++) {
5341                         status = led_get_status(i);
5342                         if (status < 0)
5343                                 return -EIO;
5344                         len += sprintf(p + len, "%d:\t\t%s\n",
5345                                        i, str_led_status(status));
5346                 }
5347         }
5348
5349         len += sprintf(p + len, "commands:\t"
5350                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5351
5352         return len;
5353 }
5354
5355 static int led_write(char *buf)
5356 {
5357         char *cmd;
5358         int led, rc;
5359         enum led_status_t s;
5360
5361         if (!led_supported)
5362                 return -ENODEV;
5363
5364         while ((cmd = next_cmd(&buf))) {
5365                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5366                         return -EINVAL;
5367
5368                 if (strstr(cmd, "off")) {
5369                         s = TPACPI_LED_OFF;
5370                 } else if (strstr(cmd, "on")) {
5371                         s = TPACPI_LED_ON;
5372                 } else if (strstr(cmd, "blink")) {
5373                         s = TPACPI_LED_BLINK;
5374                 } else {
5375                         return -EINVAL;
5376                 }
5377
5378                 rc = led_set_status(led, s);
5379                 if (rc < 0)
5380                         return rc;
5381         }
5382
5383         return 0;
5384 }
5385
5386 static struct ibm_struct led_driver_data = {
5387         .name = "led",
5388         .read = led_read,
5389         .write = led_write,
5390         .exit = led_exit,
5391 };
5392
5393 /*************************************************************************
5394  * Beep subdriver
5395  */
5396
5397 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5398
5399 #define TPACPI_BEEP_Q1 0x0001
5400
5401 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5402         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5403         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5404 };
5405
5406 static int __init beep_init(struct ibm_init_struct *iibm)
5407 {
5408         unsigned long quirks;
5409
5410         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5411
5412         TPACPI_ACPIHANDLE_INIT(beep);
5413
5414         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5415                 str_supported(beep_handle != NULL));
5416
5417         quirks = tpacpi_check_quirks(beep_quirk_table,
5418                                      ARRAY_SIZE(beep_quirk_table));
5419
5420         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5421
5422         return (beep_handle)? 0 : 1;
5423 }
5424
5425 static int beep_read(char *p)
5426 {
5427         int len = 0;
5428
5429         if (!beep_handle)
5430                 len += sprintf(p + len, "status:\t\tnot supported\n");
5431         else {
5432                 len += sprintf(p + len, "status:\t\tsupported\n");
5433                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5434         }
5435
5436         return len;
5437 }
5438
5439 static int beep_write(char *buf)
5440 {
5441         char *cmd;
5442         int beep_cmd;
5443
5444         if (!beep_handle)
5445                 return -ENODEV;
5446
5447         while ((cmd = next_cmd(&buf))) {
5448                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5449                     beep_cmd >= 0 && beep_cmd <= 17) {
5450                         /* beep_cmd set */
5451                 } else
5452                         return -EINVAL;
5453                 if (tp_features.beep_needs_two_args) {
5454                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5455                                         beep_cmd, 0))
5456                                 return -EIO;
5457                 } else {
5458                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5459                                         beep_cmd))
5460                                 return -EIO;
5461                 }
5462         }
5463
5464         return 0;
5465 }
5466
5467 static struct ibm_struct beep_driver_data = {
5468         .name = "beep",
5469         .read = beep_read,
5470         .write = beep_write,
5471 };
5472
5473 /*************************************************************************
5474  * Thermal subdriver
5475  */
5476
5477 enum thermal_access_mode {
5478         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5479         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5480         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5481         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5482         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5483 };
5484
5485 enum { /* TPACPI_THERMAL_TPEC_* */
5486         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5487         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5488         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5489
5490         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5491 };
5492
5493
5494 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5495 struct ibm_thermal_sensors_struct {
5496         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5497 };
5498
5499 static enum thermal_access_mode thermal_read_mode;
5500
5501 /* idx is zero-based */
5502 static int thermal_get_sensor(int idx, s32 *value)
5503 {
5504         int t;
5505         s8 tmp;
5506         char tmpi[5];
5507
5508         t = TP_EC_THERMAL_TMP0;
5509
5510         switch (thermal_read_mode) {
5511 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5512         case TPACPI_THERMAL_TPEC_16:
5513                 if (idx >= 8 && idx <= 15) {
5514                         t = TP_EC_THERMAL_TMP8;
5515                         idx -= 8;
5516                 }
5517                 /* fallthrough */
5518 #endif
5519         case TPACPI_THERMAL_TPEC_8:
5520                 if (idx <= 7) {
5521                         if (!acpi_ec_read(t + idx, &tmp))
5522                                 return -EIO;
5523                         *value = tmp * 1000;
5524                         return 0;
5525                 }
5526                 break;
5527
5528         case TPACPI_THERMAL_ACPI_UPDT:
5529                 if (idx <= 7) {
5530                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5531                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5532                                 return -EIO;
5533                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5534                                 return -EIO;
5535                         *value = (t - 2732) * 100;
5536                         return 0;
5537                 }
5538                 break;
5539
5540         case TPACPI_THERMAL_ACPI_TMP07:
5541                 if (idx <= 7) {
5542                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5543                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5544                                 return -EIO;
5545                         if (t > 127 || t < -127)
5546                                 t = TP_EC_THERMAL_TMP_NA;
5547                         *value = t * 1000;
5548                         return 0;
5549                 }
5550                 break;
5551
5552         case TPACPI_THERMAL_NONE:
5553         default:
5554                 return -ENOSYS;
5555         }
5556
5557         return -EINVAL;
5558 }
5559
5560 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5561 {
5562         int res, i;
5563         int n;
5564
5565         n = 8;
5566         i = 0;
5567
5568         if (!s)
5569                 return -EINVAL;
5570
5571         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5572                 n = 16;
5573
5574         for (i = 0 ; i < n; i++) {
5575                 res = thermal_get_sensor(i, &s->temp[i]);
5576                 if (res)
5577                         return res;
5578         }
5579
5580         return n;
5581 }
5582
5583 static void thermal_dump_all_sensors(void)
5584 {
5585         int n, i;
5586         struct ibm_thermal_sensors_struct t;
5587
5588         n = thermal_get_sensors(&t);
5589         if (n <= 0)
5590                 return;
5591
5592         printk(TPACPI_NOTICE
5593                 "temperatures (Celsius):");
5594
5595         for (i = 0; i < n; i++) {
5596                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5597                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5598                 else
5599                         printk(KERN_CONT " N/A");
5600         }
5601
5602         printk(KERN_CONT "\n");
5603 }
5604
5605 /* sysfs temp##_input -------------------------------------------------- */
5606
5607 static ssize_t thermal_temp_input_show(struct device *dev,
5608                            struct device_attribute *attr,
5609                            char *buf)
5610 {
5611         struct sensor_device_attribute *sensor_attr =
5612                                         to_sensor_dev_attr(attr);
5613         int idx = sensor_attr->index;
5614         s32 value;
5615         int res;
5616
5617         res = thermal_get_sensor(idx, &value);
5618         if (res)
5619                 return res;
5620         if (value == TPACPI_THERMAL_SENSOR_NA)
5621                 return -ENXIO;
5622
5623         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5624 }
5625
5626 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5627          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5628                      thermal_temp_input_show, NULL, _idxB)
5629
5630 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5631         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5632         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5633         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5634         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5635         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5636         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5637         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5638         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5639         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5640         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5641         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5642         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5643         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5644         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5645         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5646         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5647 };
5648
5649 #define THERMAL_ATTRS(X) \
5650         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5651
5652 static struct attribute *thermal_temp_input_attr[] = {
5653         THERMAL_ATTRS(8),
5654         THERMAL_ATTRS(9),
5655         THERMAL_ATTRS(10),
5656         THERMAL_ATTRS(11),
5657         THERMAL_ATTRS(12),
5658         THERMAL_ATTRS(13),
5659         THERMAL_ATTRS(14),
5660         THERMAL_ATTRS(15),
5661         THERMAL_ATTRS(0),
5662         THERMAL_ATTRS(1),
5663         THERMAL_ATTRS(2),
5664         THERMAL_ATTRS(3),
5665         THERMAL_ATTRS(4),
5666         THERMAL_ATTRS(5),
5667         THERMAL_ATTRS(6),
5668         THERMAL_ATTRS(7),
5669         NULL
5670 };
5671
5672 static const struct attribute_group thermal_temp_input16_group = {
5673         .attrs = thermal_temp_input_attr
5674 };
5675
5676 static const struct attribute_group thermal_temp_input8_group = {
5677         .attrs = &thermal_temp_input_attr[8]
5678 };
5679
5680 #undef THERMAL_SENSOR_ATTR_TEMP
5681 #undef THERMAL_ATTRS
5682
5683 /* --------------------------------------------------------------------- */
5684
5685 static int __init thermal_init(struct ibm_init_struct *iibm)
5686 {
5687         u8 t, ta1, ta2;
5688         int i;
5689         int acpi_tmp7;
5690         int res;
5691
5692         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5693
5694         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5695
5696         if (thinkpad_id.ec_model) {
5697                 /*
5698                  * Direct EC access mode: sensors at registers
5699                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5700                  * non-implemented, thermal sensors return 0x80 when
5701                  * not available
5702                  */
5703
5704                 ta1 = ta2 = 0;
5705                 for (i = 0; i < 8; i++) {
5706                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5707                                 ta1 |= t;
5708                         } else {
5709                                 ta1 = 0;
5710                                 break;
5711                         }
5712                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5713                                 ta2 |= t;
5714                         } else {
5715                                 ta1 = 0;
5716                                 break;
5717                         }
5718                 }
5719                 if (ta1 == 0) {
5720                         /* This is sheer paranoia, but we handle it anyway */
5721                         if (acpi_tmp7) {
5722                                 printk(TPACPI_ERR
5723                                        "ThinkPad ACPI EC access misbehaving, "
5724                                        "falling back to ACPI TMPx access "
5725                                        "mode\n");
5726                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5727                         } else {
5728                                 printk(TPACPI_ERR
5729                                        "ThinkPad ACPI EC access misbehaving, "
5730                                        "disabling thermal sensors access\n");
5731                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5732                         }
5733                 } else {
5734                         thermal_read_mode =
5735                             (ta2 != 0) ?
5736                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5737                 }
5738         } else if (acpi_tmp7) {
5739                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5740                         /* 600e/x, 770e, 770x */
5741                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5742                 } else {
5743                         /* Standard ACPI TMPx access, max 8 sensors */
5744                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5745                 }
5746         } else {
5747                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5748                 thermal_read_mode = TPACPI_THERMAL_NONE;
5749         }
5750
5751         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5752                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5753                 thermal_read_mode);
5754
5755         switch (thermal_read_mode) {
5756         case TPACPI_THERMAL_TPEC_16:
5757                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5758                                 &thermal_temp_input16_group);
5759                 if (res)
5760                         return res;
5761                 break;
5762         case TPACPI_THERMAL_TPEC_8:
5763         case TPACPI_THERMAL_ACPI_TMP07:
5764         case TPACPI_THERMAL_ACPI_UPDT:
5765                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5766                                 &thermal_temp_input8_group);
5767                 if (res)
5768                         return res;
5769                 break;
5770         case TPACPI_THERMAL_NONE:
5771         default:
5772                 return 1;
5773         }
5774
5775         return 0;
5776 }
5777
5778 static void thermal_exit(void)
5779 {
5780         switch (thermal_read_mode) {
5781         case TPACPI_THERMAL_TPEC_16:
5782                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5783                                    &thermal_temp_input16_group);
5784                 break;
5785         case TPACPI_THERMAL_TPEC_8:
5786         case TPACPI_THERMAL_ACPI_TMP07:
5787         case TPACPI_THERMAL_ACPI_UPDT:
5788                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5789                                    &thermal_temp_input16_group);
5790                 break;
5791         case TPACPI_THERMAL_NONE:
5792         default:
5793                 break;
5794         }
5795 }
5796
5797 static int thermal_read(char *p)
5798 {
5799         int len = 0;
5800         int n, i;
5801         struct ibm_thermal_sensors_struct t;
5802
5803         n = thermal_get_sensors(&t);
5804         if (unlikely(n < 0))
5805                 return n;
5806
5807         len += sprintf(p + len, "temperatures:\t");
5808
5809         if (n > 0) {
5810                 for (i = 0; i < (n - 1); i++)
5811                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5812                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5813         } else
5814                 len += sprintf(p + len, "not supported\n");
5815
5816         return len;
5817 }
5818
5819 static struct ibm_struct thermal_driver_data = {
5820         .name = "thermal",
5821         .read = thermal_read,
5822         .exit = thermal_exit,
5823 };
5824
5825 /*************************************************************************
5826  * EC Dump subdriver
5827  */
5828
5829 static u8 ecdump_regs[256];
5830
5831 static int ecdump_read(char *p)
5832 {
5833         int len = 0;
5834         int i, j;
5835         u8 v;
5836
5837         len += sprintf(p + len, "EC      "
5838                        " +00 +01 +02 +03 +04 +05 +06 +07"
5839                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5840         for (i = 0; i < 256; i += 16) {
5841                 len += sprintf(p + len, "EC 0x%02x:", i);
5842                 for (j = 0; j < 16; j++) {
5843                         if (!acpi_ec_read(i + j, &v))
5844                                 break;
5845                         if (v != ecdump_regs[i + j])
5846                                 len += sprintf(p + len, " *%02x", v);
5847                         else
5848                                 len += sprintf(p + len, "  %02x", v);
5849                         ecdump_regs[i + j] = v;
5850                 }
5851                 len += sprintf(p + len, "\n");
5852                 if (j != 16)
5853                         break;
5854         }
5855
5856         /* These are way too dangerous to advertise openly... */
5857 #if 0
5858         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5859                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5860         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5861                        " (<offset> is 00-ff, <value> is 0-255)\n");
5862 #endif
5863         return len;
5864 }
5865
5866 static int ecdump_write(char *buf)
5867 {
5868         char *cmd;
5869         int i, v;
5870
5871         while ((cmd = next_cmd(&buf))) {
5872                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5873                         /* i and v set */
5874                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5875                         /* i and v set */
5876                 } else
5877                         return -EINVAL;
5878                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5879                         if (!acpi_ec_write(i, v))
5880                                 return -EIO;
5881                 } else
5882                         return -EINVAL;
5883         }
5884
5885         return 0;
5886 }
5887
5888 static struct ibm_struct ecdump_driver_data = {
5889         .name = "ecdump",
5890         .read = ecdump_read,
5891         .write = ecdump_write,
5892         .flags.experimental = 1,
5893 };
5894
5895 /*************************************************************************
5896  * Backlight/brightness subdriver
5897  */
5898
5899 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5900
5901 /*
5902  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5903  * CMOS NVRAM byte 0x5E, bits 0-3.
5904  *
5905  * EC HBRV (0x31) has the following layout
5906  *   Bit 7: unknown function
5907  *   Bit 6: unknown function
5908  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5909  *   Bit 4: must be set to zero to avoid problems
5910  *   Bit 3-0: backlight brightness level
5911  *
5912  * brightness_get_raw returns status data in the HBRV layout
5913  *
5914  * WARNING: The X61 has been verified to use HBRV for something else, so
5915  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5916  * testing on the very early *60 Lenovo models...
5917  */
5918
5919 enum {
5920         TP_EC_BACKLIGHT = 0x31,
5921
5922         /* TP_EC_BACKLIGHT bitmasks */
5923         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5924         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5925         TP_EC_BACKLIGHT_MAPSW = 0x20,
5926 };
5927
5928 enum tpacpi_brightness_access_mode {
5929         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5930         TPACPI_BRGHT_MODE_EC,           /* EC control */
5931         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5932         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5933         TPACPI_BRGHT_MODE_MAX
5934 };
5935
5936 static struct backlight_device *ibm_backlight_device;
5937
5938 static enum tpacpi_brightness_access_mode brightness_mode =
5939                 TPACPI_BRGHT_MODE_MAX;
5940
5941 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5942
5943 static struct mutex brightness_mutex;
5944
5945 /* NVRAM brightness access,
5946  * call with brightness_mutex held! */
5947 static unsigned int tpacpi_brightness_nvram_get(void)
5948 {
5949         u8 lnvram;
5950
5951         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5952                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5953                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5954         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5955
5956         return lnvram;
5957 }
5958
5959 static void tpacpi_brightness_checkpoint_nvram(void)
5960 {
5961         u8 lec = 0;
5962         u8 b_nvram;
5963
5964         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5965                 return;
5966
5967         vdbg_printk(TPACPI_DBG_BRGHT,
5968                 "trying to checkpoint backlight level to NVRAM...\n");
5969
5970         if (mutex_lock_killable(&brightness_mutex) < 0)
5971                 return;
5972
5973         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5974                 goto unlock;
5975         lec &= TP_EC_BACKLIGHT_LVLMSK;
5976         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5977
5978         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5979                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5980                 /* NVRAM needs update */
5981                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5982                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5983                 b_nvram |= lec;
5984                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5985                 dbg_printk(TPACPI_DBG_BRGHT,
5986                            "updated NVRAM backlight level to %u (0x%02x)\n",
5987                            (unsigned int) lec, (unsigned int) b_nvram);
5988         } else
5989                 vdbg_printk(TPACPI_DBG_BRGHT,
5990                            "NVRAM backlight level already is %u (0x%02x)\n",
5991                            (unsigned int) lec, (unsigned int) b_nvram);
5992
5993 unlock:
5994         mutex_unlock(&brightness_mutex);
5995 }
5996
5997
5998 /* call with brightness_mutex held! */
5999 static int tpacpi_brightness_get_raw(int *status)
6000 {
6001         u8 lec = 0;
6002
6003         switch (brightness_mode) {
6004         case TPACPI_BRGHT_MODE_UCMS_STEP:
6005                 *status = tpacpi_brightness_nvram_get();
6006                 return 0;
6007         case TPACPI_BRGHT_MODE_EC:
6008         case TPACPI_BRGHT_MODE_ECNVRAM:
6009                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6010                         return -EIO;
6011                 *status = lec;
6012                 return 0;
6013         default:
6014                 return -ENXIO;
6015         }
6016 }
6017
6018 /* call with brightness_mutex held! */
6019 /* do NOT call with illegal backlight level value */
6020 static int tpacpi_brightness_set_ec(unsigned int value)
6021 {
6022         u8 lec = 0;
6023
6024         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6025                 return -EIO;
6026
6027         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6028                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6029                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6030                 return -EIO;
6031
6032         return 0;
6033 }
6034
6035 /* call with brightness_mutex held! */
6036 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6037 {
6038         int cmos_cmd, inc;
6039         unsigned int current_value, i;
6040
6041         current_value = tpacpi_brightness_nvram_get();
6042
6043         if (value == current_value)
6044                 return 0;
6045
6046         cmos_cmd = (value > current_value) ?
6047                         TP_CMOS_BRIGHTNESS_UP :
6048                         TP_CMOS_BRIGHTNESS_DOWN;
6049         inc = (value > current_value) ? 1 : -1;
6050
6051         for (i = current_value; i != value; i += inc)
6052                 if (issue_thinkpad_cmos_command(cmos_cmd))
6053                         return -EIO;
6054
6055         return 0;
6056 }
6057
6058 /* May return EINTR which can always be mapped to ERESTARTSYS */
6059 static int brightness_set(unsigned int value)
6060 {
6061         int res;
6062
6063         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6064             value < 0)
6065                 return -EINVAL;
6066
6067         vdbg_printk(TPACPI_DBG_BRGHT,
6068                         "set backlight level to %d\n", value);
6069
6070         res = mutex_lock_killable(&brightness_mutex);
6071         if (res < 0)
6072                 return res;
6073
6074         switch (brightness_mode) {
6075         case TPACPI_BRGHT_MODE_EC:
6076         case TPACPI_BRGHT_MODE_ECNVRAM:
6077                 res = tpacpi_brightness_set_ec(value);
6078                 break;
6079         case TPACPI_BRGHT_MODE_UCMS_STEP:
6080                 res = tpacpi_brightness_set_ucmsstep(value);
6081                 break;
6082         default:
6083                 res = -ENXIO;
6084         }
6085
6086         mutex_unlock(&brightness_mutex);
6087         return res;
6088 }
6089
6090 /* sysfs backlight class ----------------------------------------------- */
6091
6092 static int brightness_update_status(struct backlight_device *bd)
6093 {
6094         unsigned int level =
6095                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6096                  bd->props.power == FB_BLANK_UNBLANK) ?
6097                                 bd->props.brightness : 0;
6098
6099         dbg_printk(TPACPI_DBG_BRGHT,
6100                         "backlight: attempt to set level to %d\n",
6101                         level);
6102
6103         /* it is the backlight class's job (caller) to handle
6104          * EINTR and other errors properly */
6105         return brightness_set(level);
6106 }
6107
6108 static int brightness_get(struct backlight_device *bd)
6109 {
6110         int status, res;
6111
6112         res = mutex_lock_killable(&brightness_mutex);
6113         if (res < 0)
6114                 return 0;
6115
6116         res = tpacpi_brightness_get_raw(&status);
6117
6118         mutex_unlock(&brightness_mutex);
6119
6120         if (res < 0)
6121                 return 0;
6122
6123         return status & TP_EC_BACKLIGHT_LVLMSK;
6124 }
6125
6126 static void tpacpi_brightness_notify_change(void)
6127 {
6128         backlight_force_update(ibm_backlight_device,
6129                                BACKLIGHT_UPDATE_HOTKEY);
6130 }
6131
6132 static struct backlight_ops ibm_backlight_data = {
6133         .get_brightness = brightness_get,
6134         .update_status  = brightness_update_status,
6135 };
6136
6137 /* --------------------------------------------------------------------- */
6138
6139 /*
6140  * These are only useful for models that have only one possibility
6141  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6142  * these quirks.
6143  */
6144 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6145 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6146 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6147
6148 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6149         /* Models with ATI GPUs known to require ECNVRAM mode */
6150         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6151
6152         /* Models with ATI GPUs that can use ECNVRAM */
6153         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6154         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6155         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6156         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6157
6158         /* Models with Intel Extreme Graphics 2 */
6159         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6160         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6161         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6162
6163         /* Models with Intel GMA900 */
6164         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6165         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6166         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6167 };
6168
6169 static int __init brightness_init(struct ibm_init_struct *iibm)
6170 {
6171         int b;
6172         unsigned long quirks;
6173
6174         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6175
6176         mutex_init(&brightness_mutex);
6177
6178         quirks = tpacpi_check_quirks(brightness_quirk_table,
6179                                 ARRAY_SIZE(brightness_quirk_table));
6180
6181         /*
6182          * We always attempt to detect acpi support, so as to switch
6183          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6184          * going to publish a backlight interface
6185          */
6186         b = tpacpi_check_std_acpi_brightness_support();
6187         if (b > 0) {
6188
6189                 if (acpi_video_backlight_support()) {
6190                         if (brightness_enable > 1) {
6191                                 printk(TPACPI_NOTICE
6192                                        "Standard ACPI backlight interface "
6193                                        "available, not loading native one.\n");
6194                                 return 1;
6195                         } else if (brightness_enable == 1) {
6196                                 printk(TPACPI_NOTICE
6197                                        "Backlight control force enabled, even if standard "
6198                                        "ACPI backlight interface is available\n");
6199                         }
6200                 } else {
6201                         if (brightness_enable > 1) {
6202                                 printk(TPACPI_NOTICE
6203                                        "Standard ACPI backlight interface not "
6204                                        "available, thinkpad_acpi native "
6205                                        "brightness control enabled\n");
6206                         }
6207                 }
6208         }
6209
6210         if (!brightness_enable) {
6211                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6212                            "brightness support disabled by "
6213                            "module parameter\n");
6214                 return 1;
6215         }
6216
6217         if (b > 16) {
6218                 printk(TPACPI_ERR
6219                        "Unsupported brightness interface, "
6220                        "please contact %s\n", TPACPI_MAIL);
6221                 return 1;
6222         }
6223         if (b == 16)
6224                 tp_features.bright_16levels = 1;
6225
6226         /*
6227          * Check for module parameter bogosity, note that we
6228          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6229          * able to detect "unspecified"
6230          */
6231         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6232                 return -EINVAL;
6233
6234         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6235         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6236             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6237                 if (quirks & TPACPI_BRGHT_Q_EC)
6238                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6239                 else
6240                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6241
6242                 dbg_printk(TPACPI_DBG_BRGHT,
6243                            "driver auto-selected brightness_mode=%d\n",
6244                            brightness_mode);
6245         }
6246
6247         /* Safety */
6248         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6249             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6250              brightness_mode == TPACPI_BRGHT_MODE_EC))
6251                 return -EINVAL;
6252
6253         if (tpacpi_brightness_get_raw(&b) < 0)
6254                 return 1;
6255
6256         if (tp_features.bright_16levels)
6257                 printk(TPACPI_INFO
6258                        "detected a 16-level brightness capable ThinkPad\n");
6259
6260         ibm_backlight_device = backlight_device_register(
6261                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6262                                         &ibm_backlight_data);
6263         if (IS_ERR(ibm_backlight_device)) {
6264                 int rc = PTR_ERR(ibm_backlight_device);
6265                 ibm_backlight_device = NULL;
6266                 printk(TPACPI_ERR "Could not register backlight device\n");
6267                 return rc;
6268         }
6269         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6270                         "brightness is supported\n");
6271
6272         if (quirks & TPACPI_BRGHT_Q_ASK) {
6273                 printk(TPACPI_NOTICE
6274                         "brightness: will use unverified default: "
6275                         "brightness_mode=%d\n", brightness_mode);
6276                 printk(TPACPI_NOTICE
6277                         "brightness: please report to %s whether it works well "
6278                         "or not on your ThinkPad\n", TPACPI_MAIL);
6279         }
6280
6281         ibm_backlight_device->props.max_brightness =
6282                                 (tp_features.bright_16levels)? 15 : 7;
6283         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6284         backlight_update_status(ibm_backlight_device);
6285
6286         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6287                         "brightness: registering brightness hotkeys "
6288                         "as change notification\n");
6289         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6290                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6291                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6292         return 0;
6293 }
6294
6295 static void brightness_suspend(pm_message_t state)
6296 {
6297         tpacpi_brightness_checkpoint_nvram();
6298 }
6299
6300 static void brightness_shutdown(void)
6301 {
6302         tpacpi_brightness_checkpoint_nvram();
6303 }
6304
6305 static void brightness_exit(void)
6306 {
6307         if (ibm_backlight_device) {
6308                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6309                             "calling backlight_device_unregister()\n");
6310                 backlight_device_unregister(ibm_backlight_device);
6311         }
6312
6313         tpacpi_brightness_checkpoint_nvram();
6314 }
6315
6316 static int brightness_read(char *p)
6317 {
6318         int len = 0;
6319         int level;
6320
6321         level = brightness_get(NULL);
6322         if (level < 0) {
6323                 len += sprintf(p + len, "level:\t\tunreadable\n");
6324         } else {
6325                 len += sprintf(p + len, "level:\t\t%d\n", level);
6326                 len += sprintf(p + len, "commands:\tup, down\n");
6327                 len += sprintf(p + len, "commands:\tlevel <level>"
6328                                " (<level> is 0-%d)\n",
6329                                (tp_features.bright_16levels) ? 15 : 7);
6330         }
6331
6332         return len;
6333 }
6334
6335 static int brightness_write(char *buf)
6336 {
6337         int level;
6338         int rc;
6339         char *cmd;
6340         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6341
6342         level = brightness_get(NULL);
6343         if (level < 0)
6344                 return level;
6345
6346         while ((cmd = next_cmd(&buf))) {
6347                 if (strlencmp(cmd, "up") == 0) {
6348                         if (level < max_level)
6349                                 level++;
6350                 } else if (strlencmp(cmd, "down") == 0) {
6351                         if (level > 0)
6352                                 level--;
6353                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6354                            level >= 0 && level <= max_level) {
6355                         /* new level set */
6356                 } else
6357                         return -EINVAL;
6358         }
6359
6360         tpacpi_disclose_usertask("procfs brightness",
6361                         "set level to %d\n", level);
6362
6363         /*
6364          * Now we know what the final level should be, so we try to set it.
6365          * Doing it this way makes the syscall restartable in case of EINTR
6366          */
6367         rc = brightness_set(level);
6368         if (!rc && ibm_backlight_device)
6369                 backlight_force_update(ibm_backlight_device,
6370                                         BACKLIGHT_UPDATE_SYSFS);
6371         return (rc == -EINTR)? -ERESTARTSYS : rc;
6372 }
6373
6374 static struct ibm_struct brightness_driver_data = {
6375         .name = "brightness",
6376         .read = brightness_read,
6377         .write = brightness_write,
6378         .exit = brightness_exit,
6379         .suspend = brightness_suspend,
6380         .shutdown = brightness_shutdown,
6381 };
6382
6383 /*************************************************************************
6384  * Volume subdriver
6385  */
6386
6387 /*
6388  * IBM ThinkPads have a simple volume controller with MUTE gating.
6389  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6390  *
6391  * Since the *61 series (and probably also the later *60 series), Lenovo
6392  * ThinkPads only implement the MUTE gate.
6393  *
6394  * EC register 0x30
6395  *   Bit 6: MUTE (1 mutes sound)
6396  *   Bit 3-0: Volume
6397  *   Other bits should be zero as far as we know.
6398  *
6399  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6400  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6401  * such as bit 7 which is used to detect repeated presses of MUTE,
6402  * and we leave them unchanged.
6403  */
6404
6405 enum {
6406         TP_EC_AUDIO = 0x30,
6407
6408         /* TP_EC_AUDIO bits */
6409         TP_EC_AUDIO_MUTESW = 6,
6410
6411         /* TP_EC_AUDIO bitmasks */
6412         TP_EC_AUDIO_LVL_MSK = 0x0F,
6413         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6414
6415         /* Maximum volume */
6416         TP_EC_VOLUME_MAX = 14,
6417 };
6418
6419 enum tpacpi_volume_access_mode {
6420         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6421         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6422         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6423         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6424         TPACPI_VOL_MODE_MAX
6425 };
6426
6427 enum tpacpi_volume_capabilities {
6428         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6429         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6430         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6431         TPACPI_VOL_CAP_MAX
6432 };
6433
6434 static enum tpacpi_volume_access_mode volume_mode =
6435         TPACPI_VOL_MODE_MAX;
6436
6437 static enum tpacpi_volume_capabilities volume_capabilities;
6438 static int volume_control_allowed;
6439
6440 /*
6441  * Used to syncronize writers to TP_EC_AUDIO and
6442  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6443  */
6444 static struct mutex volume_mutex;
6445
6446 static void tpacpi_volume_checkpoint_nvram(void)
6447 {
6448         u8 lec = 0;
6449         u8 b_nvram;
6450         u8 ec_mask;
6451
6452         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6453                 return;
6454         if (!volume_control_allowed)
6455                 return;
6456
6457         vdbg_printk(TPACPI_DBG_MIXER,
6458                 "trying to checkpoint mixer state to NVRAM...\n");
6459
6460         if (tp_features.mixer_no_level_control)
6461                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6462         else
6463                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6464
6465         if (mutex_lock_killable(&volume_mutex) < 0)
6466                 return;
6467
6468         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6469                 goto unlock;
6470         lec &= ec_mask;
6471         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6472
6473         if (lec != (b_nvram & ec_mask)) {
6474                 /* NVRAM needs update */
6475                 b_nvram &= ~ec_mask;
6476                 b_nvram |= lec;
6477                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6478                 dbg_printk(TPACPI_DBG_MIXER,
6479                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6480                            (unsigned int) lec, (unsigned int) b_nvram);
6481         } else {
6482                 vdbg_printk(TPACPI_DBG_MIXER,
6483                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6484                            (unsigned int) lec, (unsigned int) b_nvram);
6485         }
6486
6487 unlock:
6488         mutex_unlock(&volume_mutex);
6489 }
6490
6491 static int volume_get_status_ec(u8 *status)
6492 {
6493         u8 s;
6494
6495         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6496                 return -EIO;
6497
6498         *status = s;
6499
6500         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6501
6502         return 0;
6503 }
6504
6505 static int volume_get_status(u8 *status)
6506 {
6507         return volume_get_status_ec(status);
6508 }
6509
6510 static int volume_set_status_ec(const u8 status)
6511 {
6512         if (!acpi_ec_write(TP_EC_AUDIO, status))
6513                 return -EIO;
6514
6515         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6516
6517         return 0;
6518 }
6519
6520 static int volume_set_status(const u8 status)
6521 {
6522         return volume_set_status_ec(status);
6523 }
6524
6525 static int volume_set_mute_ec(const bool mute)
6526 {
6527         int rc;
6528         u8 s, n;
6529
6530         if (mutex_lock_killable(&volume_mutex) < 0)
6531                 return -EINTR;
6532
6533         rc = volume_get_status_ec(&s);
6534         if (rc)
6535                 goto unlock;
6536
6537         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6538                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6539
6540         if (n != s)
6541                 rc = volume_set_status_ec(n);
6542
6543 unlock:
6544         mutex_unlock(&volume_mutex);
6545         return rc;
6546 }
6547
6548 static int volume_set_mute(const bool mute)
6549 {
6550         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6551                    (mute) ? "" : "un");
6552         return volume_set_mute_ec(mute);
6553 }
6554
6555 static int volume_set_volume_ec(const u8 vol)
6556 {
6557         int rc;
6558         u8 s, n;
6559
6560         if (vol > TP_EC_VOLUME_MAX)
6561                 return -EINVAL;
6562
6563         if (mutex_lock_killable(&volume_mutex) < 0)
6564                 return -EINTR;
6565
6566         rc = volume_get_status_ec(&s);
6567         if (rc)
6568                 goto unlock;
6569
6570         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6571
6572         if (n != s)
6573                 rc = volume_set_status_ec(n);
6574
6575 unlock:
6576         mutex_unlock(&volume_mutex);
6577         return rc;
6578 }
6579
6580 static int volume_set_volume(const u8 vol)
6581 {
6582         dbg_printk(TPACPI_DBG_MIXER,
6583                    "trying to set volume level to %hu\n", vol);
6584         return volume_set_volume_ec(vol);
6585 }
6586
6587 static void volume_suspend(pm_message_t state)
6588 {
6589         tpacpi_volume_checkpoint_nvram();
6590 }
6591
6592 static void volume_shutdown(void)
6593 {
6594         tpacpi_volume_checkpoint_nvram();
6595 }
6596
6597 static void volume_exit(void)
6598 {
6599         tpacpi_volume_checkpoint_nvram();
6600 }
6601
6602 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
6603 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
6604
6605 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6606         /* Whitelist volume level on all IBM by default */
6607         { .vendor = PCI_VENDOR_ID_IBM,
6608           .bios   = TPACPI_MATCH_ANY,
6609           .ec     = TPACPI_MATCH_ANY,
6610           .quirks = TPACPI_VOL_Q_LEVEL },
6611
6612         /* Lenovo models with volume control (needs confirmation) */
6613         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6614         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6615         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6616         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6617         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6618         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6619         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6620
6621         /* Whitelist mute-only on all Lenovo by default */
6622         { .vendor = PCI_VENDOR_ID_LENOVO,
6623           .bios   = TPACPI_MATCH_ANY,
6624           .ec     = TPACPI_MATCH_ANY,
6625           .quirks = TPACPI_VOL_Q_MUTEONLY }
6626 };
6627
6628 static int __init volume_init(struct ibm_init_struct *iibm)
6629 {
6630         unsigned long quirks;
6631
6632         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6633
6634         mutex_init(&volume_mutex);
6635
6636         /*
6637          * Check for module parameter bogosity, note that we
6638          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6639          * able to detect "unspecified"
6640          */
6641         if (volume_mode > TPACPI_VOL_MODE_MAX)
6642                 return -EINVAL;
6643
6644         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6645                 printk(TPACPI_ERR
6646                         "UCMS step volume mode not implemented, "
6647                         "please contact %s\n", TPACPI_MAIL);
6648                 return 1;
6649         }
6650
6651         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6652                 return -EINVAL;
6653
6654         quirks = tpacpi_check_quirks(volume_quirk_table,
6655                                      ARRAY_SIZE(volume_quirk_table));
6656
6657         switch (volume_capabilities) {
6658         case TPACPI_VOL_CAP_AUTO:
6659                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6660                         tp_features.mixer_no_level_control = 1;
6661                 else if (quirks & TPACPI_VOL_Q_LEVEL)
6662                         tp_features.mixer_no_level_control = 0;
6663                 else
6664                         return 1; /* no mixer */
6665                 break;
6666         case TPACPI_VOL_CAP_VOLMUTE:
6667                 tp_features.mixer_no_level_control = 0;
6668                 break;
6669         case TPACPI_VOL_CAP_MUTEONLY:
6670                 tp_features.mixer_no_level_control = 1;
6671                 break;
6672         default:
6673                 return 1;
6674         }
6675
6676         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6677                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6678                                 "using user-supplied volume_capabilities=%d\n",
6679                                 volume_capabilities);
6680
6681         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6682             volume_mode == TPACPI_VOL_MODE_MAX) {
6683                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6684
6685                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6686                                 "driver auto-selected volume_mode=%d\n",
6687                                 volume_mode);
6688         } else {
6689                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6690                                 "using user-supplied volume_mode=%d\n",
6691                                 volume_mode);
6692         }
6693
6694         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6695                         "mute is supported, volume control is %s\n",
6696                         str_supported(!tp_features.mixer_no_level_control));
6697
6698         printk(TPACPI_INFO
6699                 "Console audio control enabled, mode: %s\n",
6700                 (volume_control_allowed) ?
6701                         "override (read/write)" :
6702                         "monitor (read only)");
6703
6704         return 0;
6705 }
6706
6707 static int volume_read(char *p)
6708 {
6709         int len = 0;
6710         u8 status;
6711
6712         if (volume_get_status(&status) < 0) {
6713                 len += sprintf(p + len, "level:\t\tunreadable\n");
6714         } else {
6715                 if (tp_features.mixer_no_level_control)
6716                         len += sprintf(p + len, "level:\t\tunsupported\n");
6717                 else
6718                         len += sprintf(p + len, "level:\t\t%d\n",
6719                                         status & TP_EC_AUDIO_LVL_MSK);
6720
6721                 len += sprintf(p + len, "mute:\t\t%s\n",
6722                                 onoff(status, TP_EC_AUDIO_MUTESW));
6723
6724                 if (volume_control_allowed) {
6725                         len += sprintf(p + len, "commands:\tunmute, mute\n");
6726                         if (!tp_features.mixer_no_level_control) {
6727                                 len += sprintf(p + len,
6728                                                "commands:\tup, down\n");
6729                                 len += sprintf(p + len,
6730                                                "commands:\tlevel <level>"
6731                                                " (<level> is 0-%d)\n",
6732                                                TP_EC_VOLUME_MAX);
6733                         }
6734                 }
6735         }
6736
6737         return len;
6738 }
6739
6740 static int volume_write(char *buf)
6741 {
6742         u8 s;
6743         u8 new_level, new_mute;
6744         int l;
6745         char *cmd;
6746         int rc;
6747
6748         /*
6749          * We do allow volume control at driver startup, so that the
6750          * user can set initial state through the volume=... parameter hack.
6751          */
6752         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6753                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6754                         tp_warned.volume_ctrl_forbidden = 1;
6755                         printk(TPACPI_NOTICE
6756                                 "Console audio control in monitor mode, "
6757                                 "changes are not allowed.\n");
6758                         printk(TPACPI_NOTICE
6759                                 "Use the volume_control=1 module parameter "
6760                                 "to enable volume control\n");
6761                 }
6762                 return -EPERM;
6763         }
6764
6765         rc = volume_get_status(&s);
6766         if (rc < 0)
6767                 return rc;
6768
6769         new_level = s & TP_EC_AUDIO_LVL_MSK;
6770         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
6771
6772         while ((cmd = next_cmd(&buf))) {
6773                 if (!tp_features.mixer_no_level_control) {
6774                         if (strlencmp(cmd, "up") == 0) {
6775                                 if (new_mute)
6776                                         new_mute = 0;
6777                                 else if (new_level < TP_EC_VOLUME_MAX)
6778                                         new_level++;
6779                                 continue;
6780                         } else if (strlencmp(cmd, "down") == 0) {
6781                                 if (new_mute)
6782                                         new_mute = 0;
6783                                 else if (new_level > 0)
6784                                         new_level--;
6785                                 continue;
6786                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
6787                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
6788                                         new_level = l;
6789                                 continue;
6790                         }
6791                 }
6792                 if (strlencmp(cmd, "mute") == 0)
6793                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
6794                 else if (strlencmp(cmd, "unmute") == 0)
6795                         new_mute = 0;
6796                 else
6797                         return -EINVAL;
6798         }
6799
6800         if (tp_features.mixer_no_level_control) {
6801                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
6802                                         new_mute ? "" : "un");
6803                 rc = volume_set_mute(!!new_mute);
6804         } else {
6805                 tpacpi_disclose_usertask("procfs volume",
6806                                         "%smute and set level to %d\n",
6807                                         new_mute ? "" : "un", new_level);
6808                 rc = volume_set_status(new_mute | new_level);
6809         }
6810
6811         return (rc == -EINTR) ? -ERESTARTSYS : rc;
6812 }
6813
6814 static struct ibm_struct volume_driver_data = {
6815         .name = "volume",
6816         .read = volume_read,
6817         .write = volume_write,
6818         .exit = volume_exit,
6819         .suspend = volume_suspend,
6820         .shutdown = volume_shutdown,
6821 };
6822
6823 /*************************************************************************
6824  * Fan subdriver
6825  */
6826
6827 /*
6828  * FAN ACCESS MODES
6829  *
6830  * TPACPI_FAN_RD_ACPI_GFAN:
6831  *      ACPI GFAN method: returns fan level
6832  *
6833  *      see TPACPI_FAN_WR_ACPI_SFAN
6834  *      EC 0x2f (HFSP) not available if GFAN exists
6835  *
6836  * TPACPI_FAN_WR_ACPI_SFAN:
6837  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6838  *
6839  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6840  *      it for writing.
6841  *
6842  * TPACPI_FAN_WR_TPEC:
6843  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6844  *      Supported on almost all ThinkPads
6845  *
6846  *      Fan speed changes of any sort (including those caused by the
6847  *      disengaged mode) are usually done slowly by the firmware as the
6848  *      maximum ammount of fan duty cycle change per second seems to be
6849  *      limited.
6850  *
6851  *      Reading is not available if GFAN exists.
6852  *      Writing is not available if SFAN exists.
6853  *
6854  *      Bits
6855  *       7      automatic mode engaged;
6856  *              (default operation mode of the ThinkPad)
6857  *              fan level is ignored in this mode.
6858  *       6      full speed mode (takes precedence over bit 7);
6859  *              not available on all thinkpads.  May disable
6860  *              the tachometer while the fan controller ramps up
6861  *              the speed (which can take up to a few *minutes*).
6862  *              Speeds up fan to 100% duty-cycle, which is far above
6863  *              the standard RPM levels.  It is not impossible that
6864  *              it could cause hardware damage.
6865  *      5-3     unused in some models.  Extra bits for fan level
6866  *              in others, but still useless as all values above
6867  *              7 map to the same speed as level 7 in these models.
6868  *      2-0     fan level (0..7 usually)
6869  *                      0x00 = stop
6870  *                      0x07 = max (set when temperatures critical)
6871  *              Some ThinkPads may have other levels, see
6872  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6873  *
6874  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6875  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6876  *      does so, its initial value is meaningless (0x07).
6877  *
6878  *      For firmware bugs, refer to:
6879  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6880  *
6881  *      ----
6882  *
6883  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6884  *      Main fan tachometer reading (in RPM)
6885  *
6886  *      This register is present on all ThinkPads with a new-style EC, and
6887  *      it is known not to be present on the A21m/e, and T22, as there is
6888  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6889  *      ThinkPads from this same time period (and earlier) probably lack the
6890  *      tachometer as well.
6891  *
6892  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6893  *      was never fixed by IBM to report the EC firmware version string
6894  *      probably support the tachometer (like the early X models), so
6895  *      detecting it is quite hard.  We need more data to know for sure.
6896  *
6897  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6898  *      might result.
6899  *
6900  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6901  *      mode.
6902  *
6903  *      For firmware bugs, refer to:
6904  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6905  *
6906  *      ----
6907  *
6908  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6909  *
6910  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6911  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6912  *      is one, the tachometer registers show the speed of the auxiliary
6913  *      fan.
6914  *
6915  *      Fan control seems to affect both fans, regardless of the state
6916  *      of this bit.
6917  *
6918  *      So far, only the firmware for the X60/X61 non-tablet versions
6919  *      seem to support this (firmware TP-7M).
6920  *
6921  * TPACPI_FAN_WR_ACPI_FANS:
6922  *      ThinkPad X31, X40, X41.  Not available in the X60.
6923  *
6924  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6925  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6926  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6927  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6928  *
6929  *      The speeds are stored on handles
6930  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6931  *
6932  *      There are three default speed sets, acessible as handles:
6933  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6934  *
6935  *      ACPI DSDT switches which set is in use depending on various
6936  *      factors.
6937  *
6938  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6939  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6940  *      but the ACPI tables just mention level 7.
6941  */
6942
6943 enum {                                  /* Fan control constants */
6944         fan_status_offset = 0x2f,       /* EC register 0x2f */
6945         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6946                                          * 0x84 must be read before 0x85 */
6947         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6948                                            bit 0 selects which fan is active */
6949
6950         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6951         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6952
6953         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6954 };
6955
6956 enum fan_status_access_mode {
6957         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6958         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6959         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6960 };
6961
6962 enum fan_control_access_mode {
6963         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6964         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6965         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6966         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6967 };
6968
6969 enum fan_control_commands {
6970         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6971         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6972         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6973                                                  * and also watchdog cmd */
6974 };
6975
6976 static int fan_control_allowed;
6977
6978 static enum fan_status_access_mode fan_status_access_mode;
6979 static enum fan_control_access_mode fan_control_access_mode;
6980 static enum fan_control_commands fan_control_commands;
6981
6982 static u8 fan_control_initial_status;
6983 static u8 fan_control_desired_level;
6984 static u8 fan_control_resume_level;
6985 static int fan_watchdog_maxinterval;
6986
6987 static struct mutex fan_mutex;
6988
6989 static void fan_watchdog_fire(struct work_struct *ignored);
6990 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6991
6992 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6993 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6994            "\\FSPD",            /* 600e/x, 770e, 770x */
6995            );                   /* all others */
6996 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6997            "JFNS",              /* 770x-JL */
6998            );                   /* all others */
6999
7000 /*
7001  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7002  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7003  * be in auto mode (0x80).
7004  *
7005  * This is corrected by any write to HFSP either by the driver, or
7006  * by the firmware.
7007  *
7008  * We assume 0x07 really means auto mode while this quirk is active,
7009  * as this is far more likely than the ThinkPad being in level 7,
7010  * which is only used by the firmware during thermal emergencies.
7011  *
7012  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7013  * TP-70 (T43, R52), which are known to be buggy.
7014  */
7015
7016 static void fan_quirk1_setup(void)
7017 {
7018         if (fan_control_initial_status == 0x07) {
7019                 printk(TPACPI_NOTICE
7020                        "fan_init: initial fan status is unknown, "
7021                        "assuming it is in auto mode\n");
7022                 tp_features.fan_ctrl_status_undef = 1;
7023         }
7024 }
7025
7026 static void fan_quirk1_handle(u8 *fan_status)
7027 {
7028         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7029                 if (*fan_status != fan_control_initial_status) {
7030                         /* something changed the HFSP regisnter since
7031                          * driver init time, so it is not undefined
7032                          * anymore */
7033                         tp_features.fan_ctrl_status_undef = 0;
7034                 } else {
7035                         /* Return most likely status. In fact, it
7036                          * might be the only possible status */
7037                         *fan_status = TP_EC_FAN_AUTO;
7038                 }
7039         }
7040 }
7041
7042 /* Select main fan on X60/X61, NOOP on others */
7043 static bool fan_select_fan1(void)
7044 {
7045         if (tp_features.second_fan) {
7046                 u8 val;
7047
7048                 if (ec_read(fan_select_offset, &val) < 0)
7049                         return false;
7050                 val &= 0xFEU;
7051                 if (ec_write(fan_select_offset, val) < 0)
7052                         return false;
7053         }
7054         return true;
7055 }
7056
7057 /* Select secondary fan on X60/X61 */
7058 static bool fan_select_fan2(void)
7059 {
7060         u8 val;
7061
7062         if (!tp_features.second_fan)
7063                 return false;
7064
7065         if (ec_read(fan_select_offset, &val) < 0)
7066                 return false;
7067         val |= 0x01U;
7068         if (ec_write(fan_select_offset, val) < 0)
7069                 return false;
7070
7071         return true;
7072 }
7073
7074 /*
7075  * Call with fan_mutex held
7076  */
7077 static void fan_update_desired_level(u8 status)
7078 {
7079         if ((status &
7080              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7081                 if (status > 7)
7082                         fan_control_desired_level = 7;
7083                 else
7084                         fan_control_desired_level = status;
7085         }
7086 }
7087
7088 static int fan_get_status(u8 *status)
7089 {
7090         u8 s;
7091
7092         /* TODO:
7093          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7094
7095         switch (fan_status_access_mode) {
7096         case TPACPI_FAN_RD_ACPI_GFAN:
7097                 /* 570, 600e/x, 770e, 770x */
7098
7099                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7100                         return -EIO;
7101
7102                 if (likely(status))
7103                         *status = s & 0x07;
7104
7105                 break;
7106
7107         case TPACPI_FAN_RD_TPEC:
7108                 /* all except 570, 600e/x, 770e, 770x */
7109                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7110                         return -EIO;
7111
7112                 if (likely(status)) {
7113                         *status = s;
7114                         fan_quirk1_handle(status);
7115                 }
7116
7117                 break;
7118
7119         default:
7120                 return -ENXIO;
7121         }
7122
7123         return 0;
7124 }
7125
7126 static int fan_get_status_safe(u8 *status)
7127 {
7128         int rc;
7129         u8 s;
7130
7131         if (mutex_lock_killable(&fan_mutex))
7132                 return -ERESTARTSYS;
7133         rc = fan_get_status(&s);
7134         if (!rc)
7135                 fan_update_desired_level(s);
7136         mutex_unlock(&fan_mutex);
7137
7138         if (status)
7139                 *status = s;
7140
7141         return rc;
7142 }
7143
7144 static int fan_get_speed(unsigned int *speed)
7145 {
7146         u8 hi, lo;
7147
7148         switch (fan_status_access_mode) {
7149         case TPACPI_FAN_RD_TPEC:
7150                 /* all except 570, 600e/x, 770e, 770x */
7151                 if (unlikely(!fan_select_fan1()))
7152                         return -EIO;
7153                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7154                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7155                         return -EIO;
7156
7157                 if (likely(speed))
7158                         *speed = (hi << 8) | lo;
7159
7160                 break;
7161
7162         default:
7163                 return -ENXIO;
7164         }
7165
7166         return 0;
7167 }
7168
7169 static int fan2_get_speed(unsigned int *speed)
7170 {
7171         u8 hi, lo;
7172         bool rc;
7173
7174         switch (fan_status_access_mode) {
7175         case TPACPI_FAN_RD_TPEC:
7176                 /* all except 570, 600e/x, 770e, 770x */
7177                 if (unlikely(!fan_select_fan2()))
7178                         return -EIO;
7179                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7180                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7181                 fan_select_fan1(); /* play it safe */
7182                 if (rc)
7183                         return -EIO;
7184
7185                 if (likely(speed))
7186                         *speed = (hi << 8) | lo;
7187
7188                 break;
7189
7190         default:
7191                 return -ENXIO;
7192         }
7193
7194         return 0;
7195 }
7196
7197 static int fan_set_level(int level)
7198 {
7199         if (!fan_control_allowed)
7200                 return -EPERM;
7201
7202         switch (fan_control_access_mode) {
7203         case TPACPI_FAN_WR_ACPI_SFAN:
7204                 if (level >= 0 && level <= 7) {
7205                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7206                                 return -EIO;
7207                 } else
7208                         return -EINVAL;
7209                 break;
7210
7211         case TPACPI_FAN_WR_ACPI_FANS:
7212         case TPACPI_FAN_WR_TPEC:
7213                 if (!(level & TP_EC_FAN_AUTO) &&
7214                     !(level & TP_EC_FAN_FULLSPEED) &&
7215                     ((level < 0) || (level > 7)))
7216                         return -EINVAL;
7217
7218                 /* safety net should the EC not support AUTO
7219                  * or FULLSPEED mode bits and just ignore them */
7220                 if (level & TP_EC_FAN_FULLSPEED)
7221                         level |= 7;     /* safety min speed 7 */
7222                 else if (level & TP_EC_FAN_AUTO)
7223                         level |= 4;     /* safety min speed 4 */
7224
7225                 if (!acpi_ec_write(fan_status_offset, level))
7226                         return -EIO;
7227                 else
7228                         tp_features.fan_ctrl_status_undef = 0;
7229                 break;
7230
7231         default:
7232                 return -ENXIO;
7233         }
7234
7235         vdbg_printk(TPACPI_DBG_FAN,
7236                 "fan control: set fan control register to 0x%02x\n", level);
7237         return 0;
7238 }
7239
7240 static int fan_set_level_safe(int level)
7241 {
7242         int rc;
7243
7244         if (!fan_control_allowed)
7245                 return -EPERM;
7246
7247         if (mutex_lock_killable(&fan_mutex))
7248                 return -ERESTARTSYS;
7249
7250         if (level == TPACPI_FAN_LAST_LEVEL)
7251                 level = fan_control_desired_level;
7252
7253         rc = fan_set_level(level);
7254         if (!rc)
7255                 fan_update_desired_level(level);
7256
7257         mutex_unlock(&fan_mutex);
7258         return rc;
7259 }
7260
7261 static int fan_set_enable(void)
7262 {
7263         u8 s;
7264         int rc;
7265
7266         if (!fan_control_allowed)
7267                 return -EPERM;
7268
7269         if (mutex_lock_killable(&fan_mutex))
7270                 return -ERESTARTSYS;
7271
7272         switch (fan_control_access_mode) {
7273         case TPACPI_FAN_WR_ACPI_FANS:
7274         case TPACPI_FAN_WR_TPEC:
7275                 rc = fan_get_status(&s);
7276                 if (rc < 0)
7277                         break;
7278
7279                 /* Don't go out of emergency fan mode */
7280                 if (s != 7) {
7281                         s &= 0x07;
7282                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7283                 }
7284
7285                 if (!acpi_ec_write(fan_status_offset, s))
7286                         rc = -EIO;
7287                 else {
7288                         tp_features.fan_ctrl_status_undef = 0;
7289                         rc = 0;
7290                 }
7291                 break;
7292
7293         case TPACPI_FAN_WR_ACPI_SFAN:
7294                 rc = fan_get_status(&s);
7295                 if (rc < 0)
7296                         break;
7297
7298                 s &= 0x07;
7299
7300                 /* Set fan to at least level 4 */
7301                 s |= 4;
7302
7303                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7304                         rc = -EIO;
7305                 else
7306                         rc = 0;
7307                 break;
7308
7309         default:
7310                 rc = -ENXIO;
7311         }
7312
7313         mutex_unlock(&fan_mutex);
7314
7315         if (!rc)
7316                 vdbg_printk(TPACPI_DBG_FAN,
7317                         "fan control: set fan control register to 0x%02x\n",
7318                         s);
7319         return rc;
7320 }
7321
7322 static int fan_set_disable(void)
7323 {
7324         int rc;
7325
7326         if (!fan_control_allowed)
7327                 return -EPERM;
7328
7329         if (mutex_lock_killable(&fan_mutex))
7330                 return -ERESTARTSYS;
7331
7332         rc = 0;
7333         switch (fan_control_access_mode) {
7334         case TPACPI_FAN_WR_ACPI_FANS:
7335         case TPACPI_FAN_WR_TPEC:
7336                 if (!acpi_ec_write(fan_status_offset, 0x00))
7337                         rc = -EIO;
7338                 else {
7339                         fan_control_desired_level = 0;
7340                         tp_features.fan_ctrl_status_undef = 0;
7341                 }
7342                 break;
7343
7344         case TPACPI_FAN_WR_ACPI_SFAN:
7345                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7346                         rc = -EIO;
7347                 else
7348                         fan_control_desired_level = 0;
7349                 break;
7350
7351         default:
7352                 rc = -ENXIO;
7353         }
7354
7355         if (!rc)
7356                 vdbg_printk(TPACPI_DBG_FAN,
7357                         "fan control: set fan control register to 0\n");
7358
7359         mutex_unlock(&fan_mutex);
7360         return rc;
7361 }
7362
7363 static int fan_set_speed(int speed)
7364 {
7365         int rc;
7366
7367         if (!fan_control_allowed)
7368                 return -EPERM;
7369
7370         if (mutex_lock_killable(&fan_mutex))
7371                 return -ERESTARTSYS;
7372
7373         rc = 0;
7374         switch (fan_control_access_mode) {
7375         case TPACPI_FAN_WR_ACPI_FANS:
7376                 if (speed >= 0 && speed <= 65535) {
7377                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7378                                         speed, speed, speed))
7379                                 rc = -EIO;
7380                 } else
7381                         rc = -EINVAL;
7382                 break;
7383
7384         default:
7385                 rc = -ENXIO;
7386         }
7387
7388         mutex_unlock(&fan_mutex);
7389         return rc;
7390 }
7391
7392 static void fan_watchdog_reset(void)
7393 {
7394         static int fan_watchdog_active;
7395
7396         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7397                 return;
7398
7399         if (fan_watchdog_active)
7400                 cancel_delayed_work(&fan_watchdog_task);
7401
7402         if (fan_watchdog_maxinterval > 0 &&
7403             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7404                 fan_watchdog_active = 1;
7405                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7406                                 msecs_to_jiffies(fan_watchdog_maxinterval
7407                                                  * 1000))) {
7408                         printk(TPACPI_ERR
7409                                "failed to queue the fan watchdog, "
7410                                "watchdog will not trigger\n");
7411                 }
7412         } else
7413                 fan_watchdog_active = 0;
7414 }
7415
7416 static void fan_watchdog_fire(struct work_struct *ignored)
7417 {
7418         int rc;
7419
7420         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7421                 return;
7422
7423         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7424         rc = fan_set_enable();
7425         if (rc < 0) {
7426                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7427                         "will try again later...\n", -rc);
7428                 /* reschedule for later */
7429                 fan_watchdog_reset();
7430         }
7431 }
7432
7433 /*
7434  * SYSFS fan layout: hwmon compatible (device)
7435  *
7436  * pwm*_enable:
7437  *      0: "disengaged" mode
7438  *      1: manual mode
7439  *      2: native EC "auto" mode (recommended, hardware default)
7440  *
7441  * pwm*: set speed in manual mode, ignored otherwise.
7442  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7443  *      interpolation.
7444  *
7445  * fan*_input: tachometer reading, RPM
7446  *
7447  *
7448  * SYSFS fan layout: extensions
7449  *
7450  * fan_watchdog (driver):
7451  *      fan watchdog interval in seconds, 0 disables (default), max 120
7452  */
7453
7454 /* sysfs fan pwm1_enable ----------------------------------------------- */
7455 static ssize_t fan_pwm1_enable_show(struct device *dev,
7456                                     struct device_attribute *attr,
7457                                     char *buf)
7458 {
7459         int res, mode;
7460         u8 status;
7461
7462         res = fan_get_status_safe(&status);
7463         if (res)
7464                 return res;
7465
7466         if (status & TP_EC_FAN_FULLSPEED) {
7467                 mode = 0;
7468         } else if (status & TP_EC_FAN_AUTO) {
7469                 mode = 2;
7470         } else
7471                 mode = 1;
7472
7473         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7474 }
7475
7476 static ssize_t fan_pwm1_enable_store(struct device *dev,
7477                                      struct device_attribute *attr,
7478                                      const char *buf, size_t count)
7479 {
7480         unsigned long t;
7481         int res, level;
7482
7483         if (parse_strtoul(buf, 2, &t))
7484                 return -EINVAL;
7485
7486         tpacpi_disclose_usertask("hwmon pwm1_enable",
7487                         "set fan mode to %lu\n", t);
7488
7489         switch (t) {
7490         case 0:
7491                 level = TP_EC_FAN_FULLSPEED;
7492                 break;
7493         case 1:
7494                 level = TPACPI_FAN_LAST_LEVEL;
7495                 break;
7496         case 2:
7497                 level = TP_EC_FAN_AUTO;
7498                 break;
7499         case 3:
7500                 /* reserved for software-controlled auto mode */
7501                 return -ENOSYS;
7502         default:
7503                 return -EINVAL;
7504         }
7505
7506         res = fan_set_level_safe(level);
7507         if (res == -ENXIO)
7508                 return -EINVAL;
7509         else if (res < 0)
7510                 return res;
7511
7512         fan_watchdog_reset();
7513
7514         return count;
7515 }
7516
7517 static struct device_attribute dev_attr_fan_pwm1_enable =
7518         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7519                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7520
7521 /* sysfs fan pwm1 ------------------------------------------------------ */
7522 static ssize_t fan_pwm1_show(struct device *dev,
7523                              struct device_attribute *attr,
7524                              char *buf)
7525 {
7526         int res;
7527         u8 status;
7528
7529         res = fan_get_status_safe(&status);
7530         if (res)
7531                 return res;
7532
7533         if ((status &
7534              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7535                 status = fan_control_desired_level;
7536
7537         if (status > 7)
7538                 status = 7;
7539
7540         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7541 }
7542
7543 static ssize_t fan_pwm1_store(struct device *dev,
7544                               struct device_attribute *attr,
7545                               const char *buf, size_t count)
7546 {
7547         unsigned long s;
7548         int rc;
7549         u8 status, newlevel;
7550
7551         if (parse_strtoul(buf, 255, &s))
7552                 return -EINVAL;
7553
7554         tpacpi_disclose_usertask("hwmon pwm1",
7555                         "set fan speed to %lu\n", s);
7556
7557         /* scale down from 0-255 to 0-7 */
7558         newlevel = (s >> 5) & 0x07;
7559
7560         if (mutex_lock_killable(&fan_mutex))
7561                 return -ERESTARTSYS;
7562
7563         rc = fan_get_status(&status);
7564         if (!rc && (status &
7565                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7566                 rc = fan_set_level(newlevel);
7567                 if (rc == -ENXIO)
7568                         rc = -EINVAL;
7569                 else if (!rc) {
7570                         fan_update_desired_level(newlevel);
7571                         fan_watchdog_reset();
7572                 }
7573         }
7574
7575         mutex_unlock(&fan_mutex);
7576         return (rc)? rc : count;
7577 }
7578
7579 static struct device_attribute dev_attr_fan_pwm1 =
7580         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7581                 fan_pwm1_show, fan_pwm1_store);
7582
7583 /* sysfs fan fan1_input ------------------------------------------------ */
7584 static ssize_t fan_fan1_input_show(struct device *dev,
7585                            struct device_attribute *attr,
7586                            char *buf)
7587 {
7588         int res;
7589         unsigned int speed;
7590
7591         res = fan_get_speed(&speed);
7592         if (res < 0)
7593                 return res;
7594
7595         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7596 }
7597
7598 static struct device_attribute dev_attr_fan_fan1_input =
7599         __ATTR(fan1_input, S_IRUGO,
7600                 fan_fan1_input_show, NULL);
7601
7602 /* sysfs fan fan2_input ------------------------------------------------ */
7603 static ssize_t fan_fan2_input_show(struct device *dev,
7604                            struct device_attribute *attr,
7605                            char *buf)
7606 {
7607         int res;
7608         unsigned int speed;
7609
7610         res = fan2_get_speed(&speed);
7611         if (res < 0)
7612                 return res;
7613
7614         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7615 }
7616
7617 static struct device_attribute dev_attr_fan_fan2_input =
7618         __ATTR(fan2_input, S_IRUGO,
7619                 fan_fan2_input_show, NULL);
7620
7621 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7622 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7623                                      char *buf)
7624 {
7625         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7626 }
7627
7628 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7629                                       const char *buf, size_t count)
7630 {
7631         unsigned long t;
7632
7633         if (parse_strtoul(buf, 120, &t))
7634                 return -EINVAL;
7635
7636         if (!fan_control_allowed)
7637                 return -EPERM;
7638
7639         fan_watchdog_maxinterval = t;
7640         fan_watchdog_reset();
7641
7642         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7643
7644         return count;
7645 }
7646
7647 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7648                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7649
7650 /* --------------------------------------------------------------------- */
7651 static struct attribute *fan_attributes[] = {
7652         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7653         &dev_attr_fan_fan1_input.attr,
7654         NULL, /* for fan2_input */
7655         NULL
7656 };
7657
7658 static const struct attribute_group fan_attr_group = {
7659         .attrs = fan_attributes,
7660 };
7661
7662 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7663 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7664
7665 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7666         { .vendor = PCI_VENDOR_ID_IBM,          \
7667           .bios = TPACPI_MATCH_ANY,             \
7668           .ec = TPID(__id1, __id2),             \
7669           .quirks = __quirks }
7670
7671 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7672         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7673           .bios = TPACPI_MATCH_ANY,             \
7674           .ec = TPID(__id1, __id2),             \
7675           .quirks = __quirks }
7676
7677 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7678         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7679         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7680         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7681         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7682         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7683 };
7684
7685 #undef TPACPI_FAN_QL
7686 #undef TPACPI_FAN_QI
7687
7688 static int __init fan_init(struct ibm_init_struct *iibm)
7689 {
7690         int rc;
7691         unsigned long quirks;
7692
7693         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7694                         "initializing fan subdriver\n");
7695
7696         mutex_init(&fan_mutex);
7697         fan_status_access_mode = TPACPI_FAN_NONE;
7698         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7699         fan_control_commands = 0;
7700         fan_watchdog_maxinterval = 0;
7701         tp_features.fan_ctrl_status_undef = 0;
7702         tp_features.second_fan = 0;
7703         fan_control_desired_level = 7;
7704
7705         TPACPI_ACPIHANDLE_INIT(fans);
7706         TPACPI_ACPIHANDLE_INIT(gfan);
7707         TPACPI_ACPIHANDLE_INIT(sfan);
7708
7709         quirks = tpacpi_check_quirks(fan_quirk_table,
7710                                      ARRAY_SIZE(fan_quirk_table));
7711
7712         if (gfan_handle) {
7713                 /* 570, 600e/x, 770e, 770x */
7714                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7715         } else {
7716                 /* all other ThinkPads: note that even old-style
7717                  * ThinkPad ECs supports the fan control register */
7718                 if (likely(acpi_ec_read(fan_status_offset,
7719                                         &fan_control_initial_status))) {
7720                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7721                         if (quirks & TPACPI_FAN_Q1)
7722                                 fan_quirk1_setup();
7723                         if (quirks & TPACPI_FAN_2FAN) {
7724                                 tp_features.second_fan = 1;
7725                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7726                                         "secondary fan support enabled\n");
7727                         }
7728                 } else {
7729                         printk(TPACPI_ERR
7730                                "ThinkPad ACPI EC access misbehaving, "
7731                                "fan status and control unavailable\n");
7732                         return 1;
7733                 }
7734         }
7735
7736         if (sfan_handle) {
7737                 /* 570, 770x-JL */
7738                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7739                 fan_control_commands |=
7740                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7741         } else {
7742                 if (!gfan_handle) {
7743                         /* gfan without sfan means no fan control */
7744                         /* all other models implement TP EC 0x2f control */
7745
7746                         if (fans_handle) {
7747                                 /* X31, X40, X41 */
7748                                 fan_control_access_mode =
7749                                     TPACPI_FAN_WR_ACPI_FANS;
7750                                 fan_control_commands |=
7751                                     TPACPI_FAN_CMD_SPEED |
7752                                     TPACPI_FAN_CMD_LEVEL |
7753                                     TPACPI_FAN_CMD_ENABLE;
7754                         } else {
7755                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7756                                 fan_control_commands |=
7757                                     TPACPI_FAN_CMD_LEVEL |
7758                                     TPACPI_FAN_CMD_ENABLE;
7759                         }
7760                 }
7761         }
7762
7763         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7764                 "fan is %s, modes %d, %d\n",
7765                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7766                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7767                 fan_status_access_mode, fan_control_access_mode);
7768
7769         /* fan control master switch */
7770         if (!fan_control_allowed) {
7771                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7772                 fan_control_commands = 0;
7773                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7774                            "fan control features disabled by parameter\n");
7775         }
7776
7777         /* update fan_control_desired_level */
7778         if (fan_status_access_mode != TPACPI_FAN_NONE)
7779                 fan_get_status_safe(NULL);
7780
7781         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7782             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7783                 if (tp_features.second_fan) {
7784                         /* attach second fan tachometer */
7785                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7786                                         &dev_attr_fan_fan2_input.attr;
7787                 }
7788                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7789                                          &fan_attr_group);
7790                 if (rc < 0)
7791                         return rc;
7792
7793                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7794                                         &driver_attr_fan_watchdog);
7795                 if (rc < 0) {
7796                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7797                                         &fan_attr_group);
7798                         return rc;
7799                 }
7800                 return 0;
7801         } else
7802                 return 1;
7803 }
7804
7805 static void fan_exit(void)
7806 {
7807         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7808                     "cancelling any pending fan watchdog tasks\n");
7809
7810         /* FIXME: can we really do this unconditionally? */
7811         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7812         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7813                            &driver_attr_fan_watchdog);
7814
7815         cancel_delayed_work(&fan_watchdog_task);
7816         flush_workqueue(tpacpi_wq);
7817 }
7818
7819 static void fan_suspend(pm_message_t state)
7820 {
7821         int rc;
7822
7823         if (!fan_control_allowed)
7824                 return;
7825
7826         /* Store fan status in cache */
7827         fan_control_resume_level = 0;
7828         rc = fan_get_status_safe(&fan_control_resume_level);
7829         if (rc < 0)
7830                 printk(TPACPI_NOTICE
7831                         "failed to read fan level for later "
7832                         "restore during resume: %d\n", rc);
7833
7834         /* if it is undefined, don't attempt to restore it.
7835          * KEEP THIS LAST */
7836         if (tp_features.fan_ctrl_status_undef)
7837                 fan_control_resume_level = 0;
7838 }
7839
7840 static void fan_resume(void)
7841 {
7842         u8 current_level = 7;
7843         bool do_set = false;
7844         int rc;
7845
7846         /* DSDT *always* updates status on resume */
7847         tp_features.fan_ctrl_status_undef = 0;
7848
7849         if (!fan_control_allowed ||
7850             !fan_control_resume_level ||
7851             (fan_get_status_safe(&current_level) < 0))
7852                 return;
7853
7854         switch (fan_control_access_mode) {
7855         case TPACPI_FAN_WR_ACPI_SFAN:
7856                 /* never decrease fan level */
7857                 do_set = (fan_control_resume_level > current_level);
7858                 break;
7859         case TPACPI_FAN_WR_ACPI_FANS:
7860         case TPACPI_FAN_WR_TPEC:
7861                 /* never decrease fan level, scale is:
7862                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7863                  *
7864                  * We expect the firmware to set either 7 or AUTO, but we
7865                  * handle FULLSPEED out of paranoia.
7866                  *
7867                  * So, we can safely only restore FULLSPEED or 7, anything
7868                  * else could slow the fan.  Restoring AUTO is useless, at
7869                  * best that's exactly what the DSDT already set (it is the
7870                  * slower it uses).
7871                  *
7872                  * Always keep in mind that the DSDT *will* have set the
7873                  * fans to what the vendor supposes is the best level.  We
7874                  * muck with it only to speed the fan up.
7875                  */
7876                 if (fan_control_resume_level != 7 &&
7877                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7878                         return;
7879                 else
7880                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7881                                  (current_level != fan_control_resume_level);
7882                 break;
7883         default:
7884                 return;
7885         }
7886         if (do_set) {
7887                 printk(TPACPI_NOTICE
7888                         "restoring fan level to 0x%02x\n",
7889                         fan_control_resume_level);
7890                 rc = fan_set_level_safe(fan_control_resume_level);
7891                 if (rc < 0)
7892                         printk(TPACPI_NOTICE
7893                                 "failed to restore fan level: %d\n", rc);
7894         }
7895 }
7896
7897 static int fan_read(char *p)
7898 {
7899         int len = 0;
7900         int rc;
7901         u8 status;
7902         unsigned int speed = 0;
7903
7904         switch (fan_status_access_mode) {
7905         case TPACPI_FAN_RD_ACPI_GFAN:
7906                 /* 570, 600e/x, 770e, 770x */
7907                 rc = fan_get_status_safe(&status);
7908                 if (rc < 0)
7909                         return rc;
7910
7911                 len += sprintf(p + len, "status:\t\t%s\n"
7912                                "level:\t\t%d\n",
7913                                (status != 0) ? "enabled" : "disabled", status);
7914                 break;
7915
7916         case TPACPI_FAN_RD_TPEC:
7917                 /* all except 570, 600e/x, 770e, 770x */
7918                 rc = fan_get_status_safe(&status);
7919                 if (rc < 0)
7920                         return rc;
7921
7922                 len += sprintf(p + len, "status:\t\t%s\n",
7923                                (status != 0) ? "enabled" : "disabled");
7924
7925                 rc = fan_get_speed(&speed);
7926                 if (rc < 0)
7927                         return rc;
7928
7929                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7930
7931                 if (status & TP_EC_FAN_FULLSPEED)
7932                         /* Disengaged mode takes precedence */
7933                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7934                 else if (status & TP_EC_FAN_AUTO)
7935                         len += sprintf(p + len, "level:\t\tauto\n");
7936                 else
7937                         len += sprintf(p + len, "level:\t\t%d\n", status);
7938                 break;
7939
7940         case TPACPI_FAN_NONE:
7941         default:
7942                 len += sprintf(p + len, "status:\t\tnot supported\n");
7943         }
7944
7945         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7946                 len += sprintf(p + len, "commands:\tlevel <level>");
7947
7948                 switch (fan_control_access_mode) {
7949                 case TPACPI_FAN_WR_ACPI_SFAN:
7950                         len += sprintf(p + len, " (<level> is 0-7)\n");
7951                         break;
7952
7953                 default:
7954                         len += sprintf(p + len, " (<level> is 0-7, "
7955                                        "auto, disengaged, full-speed)\n");
7956                         break;
7957                 }
7958         }
7959
7960         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7961                 len += sprintf(p + len, "commands:\tenable, disable\n"
7962                                "commands:\twatchdog <timeout> (<timeout> "
7963                                "is 0 (off), 1-120 (seconds))\n");
7964
7965         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7966                 len += sprintf(p + len, "commands:\tspeed <speed>"
7967                                " (<speed> is 0-65535)\n");
7968
7969         return len;
7970 }
7971
7972 static int fan_write_cmd_level(const char *cmd, int *rc)
7973 {
7974         int level;
7975
7976         if (strlencmp(cmd, "level auto") == 0)
7977                 level = TP_EC_FAN_AUTO;
7978         else if ((strlencmp(cmd, "level disengaged") == 0) |
7979                         (strlencmp(cmd, "level full-speed") == 0))
7980                 level = TP_EC_FAN_FULLSPEED;
7981         else if (sscanf(cmd, "level %d", &level) != 1)
7982                 return 0;
7983
7984         *rc = fan_set_level_safe(level);
7985         if (*rc == -ENXIO)
7986                 printk(TPACPI_ERR "level command accepted for unsupported "
7987                        "access mode %d", fan_control_access_mode);
7988         else if (!*rc)
7989                 tpacpi_disclose_usertask("procfs fan",
7990                         "set level to %d\n", level);
7991
7992         return 1;
7993 }
7994
7995 static int fan_write_cmd_enable(const char *cmd, int *rc)
7996 {
7997         if (strlencmp(cmd, "enable") != 0)
7998                 return 0;
7999
8000         *rc = fan_set_enable();
8001         if (*rc == -ENXIO)
8002                 printk(TPACPI_ERR "enable command accepted for unsupported "
8003                        "access mode %d", fan_control_access_mode);
8004         else if (!*rc)
8005                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8006
8007         return 1;
8008 }
8009
8010 static int fan_write_cmd_disable(const char *cmd, int *rc)
8011 {
8012         if (strlencmp(cmd, "disable") != 0)
8013                 return 0;
8014
8015         *rc = fan_set_disable();
8016         if (*rc == -ENXIO)
8017                 printk(TPACPI_ERR "disable command accepted for unsupported "
8018                        "access mode %d", fan_control_access_mode);
8019         else if (!*rc)
8020                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8021
8022         return 1;
8023 }
8024
8025 static int fan_write_cmd_speed(const char *cmd, int *rc)
8026 {
8027         int speed;
8028
8029         /* TODO:
8030          * Support speed <low> <medium> <high> ? */
8031
8032         if (sscanf(cmd, "speed %d", &speed) != 1)
8033                 return 0;
8034
8035         *rc = fan_set_speed(speed);
8036         if (*rc == -ENXIO)
8037                 printk(TPACPI_ERR "speed command accepted for unsupported "
8038                        "access mode %d", fan_control_access_mode);
8039         else if (!*rc)
8040                 tpacpi_disclose_usertask("procfs fan",
8041                         "set speed to %d\n", speed);
8042
8043         return 1;
8044 }
8045
8046 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8047 {
8048         int interval;
8049
8050         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8051                 return 0;
8052
8053         if (interval < 0 || interval > 120)
8054                 *rc = -EINVAL;
8055         else {
8056                 fan_watchdog_maxinterval = interval;
8057                 tpacpi_disclose_usertask("procfs fan",
8058                         "set watchdog timer to %d\n",
8059                         interval);
8060         }
8061
8062         return 1;
8063 }
8064
8065 static int fan_write(char *buf)
8066 {
8067         char *cmd;
8068         int rc = 0;
8069
8070         while (!rc && (cmd = next_cmd(&buf))) {
8071                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8072                       fan_write_cmd_level(cmd, &rc)) &&
8073                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8074                       (fan_write_cmd_enable(cmd, &rc) ||
8075                        fan_write_cmd_disable(cmd, &rc) ||
8076                        fan_write_cmd_watchdog(cmd, &rc))) &&
8077                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8078                       fan_write_cmd_speed(cmd, &rc))
8079                     )
8080                         rc = -EINVAL;
8081                 else if (!rc)
8082                         fan_watchdog_reset();
8083         }
8084
8085         return rc;
8086 }
8087
8088 static struct ibm_struct fan_driver_data = {
8089         .name = "fan",
8090         .read = fan_read,
8091         .write = fan_write,
8092         .exit = fan_exit,
8093         .suspend = fan_suspend,
8094         .resume = fan_resume,
8095 };
8096
8097 /****************************************************************************
8098  ****************************************************************************
8099  *
8100  * Infrastructure
8101  *
8102  ****************************************************************************
8103  ****************************************************************************/
8104
8105 /*
8106  * HKEY event callout for other subdrivers go here
8107  * (yes, it is ugly, but it is quick, safe, and gets the job done
8108  */
8109 static void tpacpi_driver_event(const unsigned int hkey_event)
8110 {
8111         if (ibm_backlight_device) {
8112                 switch (hkey_event) {
8113                 case TP_HKEY_EV_BRGHT_UP:
8114                 case TP_HKEY_EV_BRGHT_DOWN:
8115                         tpacpi_brightness_notify_change();
8116                 }
8117         }
8118 }
8119
8120
8121
8122 static void hotkey_driver_event(const unsigned int scancode)
8123 {
8124         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8125 }
8126
8127 /* sysfs name ---------------------------------------------------------- */
8128 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8129                            struct device_attribute *attr,
8130                            char *buf)
8131 {
8132         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8133 }
8134
8135 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8136         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8137
8138 /* --------------------------------------------------------------------- */
8139
8140 /* /proc support */
8141 static struct proc_dir_entry *proc_dir;
8142
8143 /*
8144  * Module and infrastructure proble, init and exit handling
8145  */
8146
8147 static int force_load;
8148
8149 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8150 static const char * __init str_supported(int is_supported)
8151 {
8152         static char text_unsupported[] __initdata = "not supported";
8153
8154         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8155 }
8156 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8157
8158 static void ibm_exit(struct ibm_struct *ibm)
8159 {
8160         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8161
8162         list_del_init(&ibm->all_drivers);
8163
8164         if (ibm->flags.acpi_notify_installed) {
8165                 dbg_printk(TPACPI_DBG_EXIT,
8166                         "%s: acpi_remove_notify_handler\n", ibm->name);
8167                 BUG_ON(!ibm->acpi);
8168                 acpi_remove_notify_handler(*ibm->acpi->handle,
8169                                            ibm->acpi->type,
8170                                            dispatch_acpi_notify);
8171                 ibm->flags.acpi_notify_installed = 0;
8172                 ibm->flags.acpi_notify_installed = 0;
8173         }
8174
8175         if (ibm->flags.proc_created) {
8176                 dbg_printk(TPACPI_DBG_EXIT,
8177                         "%s: remove_proc_entry\n", ibm->name);
8178                 remove_proc_entry(ibm->name, proc_dir);
8179                 ibm->flags.proc_created = 0;
8180         }
8181
8182         if (ibm->flags.acpi_driver_registered) {
8183                 dbg_printk(TPACPI_DBG_EXIT,
8184                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8185                 BUG_ON(!ibm->acpi);
8186                 acpi_bus_unregister_driver(ibm->acpi->driver);
8187                 kfree(ibm->acpi->driver);
8188                 ibm->acpi->driver = NULL;
8189                 ibm->flags.acpi_driver_registered = 0;
8190         }
8191
8192         if (ibm->flags.init_called && ibm->exit) {
8193                 ibm->exit();
8194                 ibm->flags.init_called = 0;
8195         }
8196
8197         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8198 }
8199
8200 static int __init ibm_init(struct ibm_init_struct *iibm)
8201 {
8202         int ret;
8203         struct ibm_struct *ibm = iibm->data;
8204         struct proc_dir_entry *entry;
8205
8206         BUG_ON(ibm == NULL);
8207
8208         INIT_LIST_HEAD(&ibm->all_drivers);
8209
8210         if (ibm->flags.experimental && !experimental)
8211                 return 0;
8212
8213         dbg_printk(TPACPI_DBG_INIT,
8214                 "probing for %s\n", ibm->name);
8215
8216         if (iibm->init) {
8217                 ret = iibm->init(iibm);
8218                 if (ret > 0)
8219                         return 0;       /* probe failed */
8220                 if (ret)
8221                         return ret;
8222
8223                 ibm->flags.init_called = 1;
8224         }
8225
8226         if (ibm->acpi) {
8227                 if (ibm->acpi->hid) {
8228                         ret = register_tpacpi_subdriver(ibm);
8229                         if (ret)
8230                                 goto err_out;
8231                 }
8232
8233                 if (ibm->acpi->notify) {
8234                         ret = setup_acpi_notify(ibm);
8235                         if (ret == -ENODEV) {
8236                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8237                                         ibm->name);
8238                                 ret = 0;
8239                                 goto err_out;
8240                         }
8241                         if (ret < 0)
8242                                 goto err_out;
8243                 }
8244         }
8245
8246         dbg_printk(TPACPI_DBG_INIT,
8247                 "%s installed\n", ibm->name);
8248
8249         if (ibm->read) {
8250                 entry = create_proc_entry(ibm->name,
8251                                           S_IFREG | S_IRUGO | S_IWUSR,
8252                                           proc_dir);
8253                 if (!entry) {
8254                         printk(TPACPI_ERR "unable to create proc entry %s\n",
8255                                ibm->name);
8256                         ret = -ENODEV;
8257                         goto err_out;
8258                 }
8259                 entry->data = ibm;
8260                 entry->read_proc = &dispatch_procfs_read;
8261                 if (ibm->write)
8262                         entry->write_proc = &dispatch_procfs_write;
8263                 ibm->flags.proc_created = 1;
8264         }
8265
8266         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8267
8268         return 0;
8269
8270 err_out:
8271         dbg_printk(TPACPI_DBG_INIT,
8272                 "%s: at error exit path with result %d\n",
8273                 ibm->name, ret);
8274
8275         ibm_exit(ibm);
8276         return (ret < 0)? ret : 0;
8277 }
8278
8279 /* Probing */
8280
8281 static bool __pure __init tpacpi_is_fw_digit(const char c)
8282 {
8283         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8284 }
8285
8286 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8287 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8288                                                 const char t)
8289 {
8290         return s && strlen(s) >= 8 &&
8291                 tpacpi_is_fw_digit(s[0]) &&
8292                 tpacpi_is_fw_digit(s[1]) &&
8293                 s[2] == t && s[3] == 'T' &&
8294                 tpacpi_is_fw_digit(s[4]) &&
8295                 tpacpi_is_fw_digit(s[5]) &&
8296                 s[6] == 'W' && s[7] == 'W';
8297 }
8298
8299 /* returns 0 - probe ok, or < 0 - probe error.
8300  * Probe ok doesn't mean thinkpad found.
8301  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8302 static int __must_check __init get_thinkpad_model_data(
8303                                                 struct thinkpad_id_data *tp)
8304 {
8305         const struct dmi_device *dev = NULL;
8306         char ec_fw_string[18];
8307         char const *s;
8308
8309         if (!tp)
8310                 return -EINVAL;
8311
8312         memset(tp, 0, sizeof(*tp));
8313
8314         if (dmi_name_in_vendors("IBM"))
8315                 tp->vendor = PCI_VENDOR_ID_IBM;
8316         else if (dmi_name_in_vendors("LENOVO"))
8317                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8318         else
8319                 return 0;
8320
8321         s = dmi_get_system_info(DMI_BIOS_VERSION);
8322         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8323         if (s && !tp->bios_version_str)
8324                 return -ENOMEM;
8325
8326         /* Really ancient ThinkPad 240X will fail this, which is fine */
8327         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8328                 return 0;
8329
8330         tp->bios_model = tp->bios_version_str[0]
8331                          | (tp->bios_version_str[1] << 8);
8332         tp->bios_release = (tp->bios_version_str[4] << 8)
8333                          | tp->bios_version_str[5];
8334
8335         /*
8336          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8337          * X32 or newer, all Z series;  Some models must have an
8338          * up-to-date BIOS or they will not be detected.
8339          *
8340          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8341          */
8342         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8343                 if (sscanf(dev->name,
8344                            "IBM ThinkPad Embedded Controller -[%17c",
8345                            ec_fw_string) == 1) {
8346                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8347                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8348
8349                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8350                         if (!tp->ec_version_str)
8351                                 return -ENOMEM;
8352
8353                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8354                                 tp->ec_model = ec_fw_string[0]
8355                                                 | (ec_fw_string[1] << 8);
8356                                 tp->ec_release = (ec_fw_string[4] << 8)
8357                                                 | ec_fw_string[5];
8358                         } else {
8359                                 printk(TPACPI_NOTICE
8360                                         "ThinkPad firmware release %s "
8361                                         "doesn't match the known patterns\n",
8362                                         ec_fw_string);
8363                                 printk(TPACPI_NOTICE
8364                                         "please report this to %s\n",
8365                                         TPACPI_MAIL);
8366                         }
8367                         break;
8368                 }
8369         }
8370
8371         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8372         if (s && !strnicmp(s, "ThinkPad", 8)) {
8373                 tp->model_str = kstrdup(s, GFP_KERNEL);
8374                 if (!tp->model_str)
8375                         return -ENOMEM;
8376         }
8377
8378         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8379         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8380         if (s && !tp->nummodel_str)
8381                 return -ENOMEM;
8382
8383         return 0;
8384 }
8385
8386 static int __init probe_for_thinkpad(void)
8387 {
8388         int is_thinkpad;
8389
8390         if (acpi_disabled)
8391                 return -ENODEV;
8392
8393         /*
8394          * Non-ancient models have better DMI tagging, but very old models
8395          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8396          */
8397         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8398                       (thinkpad_id.ec_model != 0) ||
8399                       tpacpi_is_fw_known();
8400
8401         /* ec is required because many other handles are relative to it */
8402         TPACPI_ACPIHANDLE_INIT(ec);
8403         if (!ec_handle) {
8404                 if (is_thinkpad)
8405                         printk(TPACPI_ERR
8406                                 "Not yet supported ThinkPad detected!\n");
8407                 return -ENODEV;
8408         }
8409
8410         if (!is_thinkpad && !force_load)
8411                 return -ENODEV;
8412
8413         return 0;
8414 }
8415
8416
8417 /* Module init, exit, parameters */
8418
8419 static struct ibm_init_struct ibms_init[] __initdata = {
8420         {
8421                 .init = thinkpad_acpi_driver_init,
8422                 .data = &thinkpad_acpi_driver_data,
8423         },
8424         {
8425                 .init = hotkey_init,
8426                 .data = &hotkey_driver_data,
8427         },
8428         {
8429                 .init = bluetooth_init,
8430                 .data = &bluetooth_driver_data,
8431         },
8432         {
8433                 .init = wan_init,
8434                 .data = &wan_driver_data,
8435         },
8436         {
8437                 .init = uwb_init,
8438                 .data = &uwb_driver_data,
8439         },
8440 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8441         {
8442                 .init = video_init,
8443                 .data = &video_driver_data,
8444         },
8445 #endif
8446         {
8447                 .init = light_init,
8448                 .data = &light_driver_data,
8449         },
8450         {
8451                 .init = cmos_init,
8452                 .data = &cmos_driver_data,
8453         },
8454         {
8455                 .init = led_init,
8456                 .data = &led_driver_data,
8457         },
8458         {
8459                 .init = beep_init,
8460                 .data = &beep_driver_data,
8461         },
8462         {
8463                 .init = thermal_init,
8464                 .data = &thermal_driver_data,
8465         },
8466         {
8467                 .data = &ecdump_driver_data,
8468         },
8469         {
8470                 .init = brightness_init,
8471                 .data = &brightness_driver_data,
8472         },
8473         {
8474                 .init = volume_init,
8475                 .data = &volume_driver_data,
8476         },
8477         {
8478                 .init = fan_init,
8479                 .data = &fan_driver_data,
8480         },
8481 };
8482
8483 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8484 {
8485         unsigned int i;
8486         struct ibm_struct *ibm;
8487
8488         if (!kp || !kp->name || !val)
8489                 return -EINVAL;
8490
8491         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8492                 ibm = ibms_init[i].data;
8493                 WARN_ON(ibm == NULL);
8494
8495                 if (!ibm || !ibm->name)
8496                         continue;
8497
8498                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8499                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8500                                 return -ENOSPC;
8501                         strcpy(ibms_init[i].param, val);
8502                         strcat(ibms_init[i].param, ",");
8503                         return 0;
8504                 }
8505         }
8506
8507         return -EINVAL;
8508 }
8509
8510 module_param(experimental, int, 0444);
8511 MODULE_PARM_DESC(experimental,
8512                  "Enables experimental features when non-zero");
8513
8514 module_param_named(debug, dbg_level, uint, 0);
8515 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8516
8517 module_param(force_load, bool, 0444);
8518 MODULE_PARM_DESC(force_load,
8519                  "Attempts to load the driver even on a "
8520                  "mis-identified ThinkPad when true");
8521
8522 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8523 MODULE_PARM_DESC(fan_control,
8524                  "Enables setting fan parameters features when true");
8525
8526 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8527 MODULE_PARM_DESC(brightness_mode,
8528                  "Selects brightness control strategy: "
8529                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8530
8531 module_param(brightness_enable, uint, 0444);
8532 MODULE_PARM_DESC(brightness_enable,
8533                  "Enables backlight control when 1, disables when 0");
8534
8535 module_param(hotkey_report_mode, uint, 0444);
8536 MODULE_PARM_DESC(hotkey_report_mode,
8537                  "used for backwards compatibility with userspace, "
8538                  "see documentation");
8539
8540 module_param_named(volume_mode, volume_mode, uint, 0444);
8541 MODULE_PARM_DESC(volume_mode,
8542                  "Selects volume control strategy: "
8543                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8544
8545 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8546 MODULE_PARM_DESC(volume_capabilities,
8547                  "Selects the mixer capabilites: "
8548                  "0=auto, 1=volume and mute, 2=mute only");
8549
8550 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8551 MODULE_PARM_DESC(volume_control,
8552                  "Enables software override for the console audio "
8553                  "control when true");
8554
8555 #define TPACPI_PARAM(feature) \
8556         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8557         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8558                          "at module load, see documentation")
8559
8560 TPACPI_PARAM(hotkey);
8561 TPACPI_PARAM(bluetooth);
8562 TPACPI_PARAM(video);
8563 TPACPI_PARAM(light);
8564 TPACPI_PARAM(cmos);
8565 TPACPI_PARAM(led);
8566 TPACPI_PARAM(beep);
8567 TPACPI_PARAM(ecdump);
8568 TPACPI_PARAM(brightness);
8569 TPACPI_PARAM(volume);
8570 TPACPI_PARAM(fan);
8571
8572 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8573 module_param(dbg_wlswemul, uint, 0444);
8574 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8575 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8576 MODULE_PARM_DESC(wlsw_state,
8577                  "Initial state of the emulated WLSW switch");
8578
8579 module_param(dbg_bluetoothemul, uint, 0444);
8580 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8581 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8582 MODULE_PARM_DESC(bluetooth_state,
8583                  "Initial state of the emulated bluetooth switch");
8584
8585 module_param(dbg_wwanemul, uint, 0444);
8586 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8587 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8588 MODULE_PARM_DESC(wwan_state,
8589                  "Initial state of the emulated WWAN switch");
8590
8591 module_param(dbg_uwbemul, uint, 0444);
8592 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8593 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8594 MODULE_PARM_DESC(uwb_state,
8595                  "Initial state of the emulated UWB switch");
8596 #endif
8597
8598 static void thinkpad_acpi_module_exit(void)
8599 {
8600         struct ibm_struct *ibm, *itmp;
8601
8602         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8603
8604         list_for_each_entry_safe_reverse(ibm, itmp,
8605                                          &tpacpi_all_drivers,
8606                                          all_drivers) {
8607                 ibm_exit(ibm);
8608         }
8609
8610         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8611
8612         if (tpacpi_inputdev) {
8613                 if (tp_features.input_device_registered)
8614                         input_unregister_device(tpacpi_inputdev);
8615                 else
8616                         input_free_device(tpacpi_inputdev);
8617         }
8618
8619         if (tpacpi_hwmon)
8620                 hwmon_device_unregister(tpacpi_hwmon);
8621
8622         if (tp_features.sensors_pdev_attrs_registered)
8623                 device_remove_file(&tpacpi_sensors_pdev->dev,
8624                                    &dev_attr_thinkpad_acpi_pdev_name);
8625         if (tpacpi_sensors_pdev)
8626                 platform_device_unregister(tpacpi_sensors_pdev);
8627         if (tpacpi_pdev)
8628                 platform_device_unregister(tpacpi_pdev);
8629
8630         if (tp_features.sensors_pdrv_attrs_registered)
8631                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8632         if (tp_features.platform_drv_attrs_registered)
8633                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8634
8635         if (tp_features.sensors_pdrv_registered)
8636                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8637
8638         if (tp_features.platform_drv_registered)
8639                 platform_driver_unregister(&tpacpi_pdriver);
8640
8641         if (proc_dir)
8642                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8643
8644         if (tpacpi_wq)
8645                 destroy_workqueue(tpacpi_wq);
8646
8647         kfree(thinkpad_id.bios_version_str);
8648         kfree(thinkpad_id.ec_version_str);
8649         kfree(thinkpad_id.model_str);
8650 }
8651
8652
8653 static int __init thinkpad_acpi_module_init(void)
8654 {
8655         int ret, i;
8656
8657         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8658
8659         /* Parameter checking */
8660         if (hotkey_report_mode > 2)
8661                 return -EINVAL;
8662
8663         /* Driver-level probe */
8664
8665         ret = get_thinkpad_model_data(&thinkpad_id);
8666         if (ret) {
8667                 printk(TPACPI_ERR
8668                         "unable to get DMI data: %d\n", ret);
8669                 thinkpad_acpi_module_exit();
8670                 return ret;
8671         }
8672         ret = probe_for_thinkpad();
8673         if (ret) {
8674                 thinkpad_acpi_module_exit();
8675                 return ret;
8676         }
8677
8678         /* Driver initialization */
8679
8680         TPACPI_ACPIHANDLE_INIT(ecrd);
8681         TPACPI_ACPIHANDLE_INIT(ecwr);
8682
8683         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8684         if (!tpacpi_wq) {
8685                 thinkpad_acpi_module_exit();
8686                 return -ENOMEM;
8687         }
8688
8689         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8690         if (!proc_dir) {
8691                 printk(TPACPI_ERR
8692                        "unable to create proc dir " TPACPI_PROC_DIR);
8693                 thinkpad_acpi_module_exit();
8694                 return -ENODEV;
8695         }
8696
8697         ret = platform_driver_register(&tpacpi_pdriver);
8698         if (ret) {
8699                 printk(TPACPI_ERR
8700                        "unable to register main platform driver\n");
8701                 thinkpad_acpi_module_exit();
8702                 return ret;
8703         }
8704         tp_features.platform_drv_registered = 1;
8705
8706         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8707         if (ret) {
8708                 printk(TPACPI_ERR
8709                        "unable to register hwmon platform driver\n");
8710                 thinkpad_acpi_module_exit();
8711                 return ret;
8712         }
8713         tp_features.sensors_pdrv_registered = 1;
8714
8715         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8716         if (!ret) {
8717                 tp_features.platform_drv_attrs_registered = 1;
8718                 ret = tpacpi_create_driver_attributes(
8719                                         &tpacpi_hwmon_pdriver.driver);
8720         }
8721         if (ret) {
8722                 printk(TPACPI_ERR
8723                        "unable to create sysfs driver attributes\n");
8724                 thinkpad_acpi_module_exit();
8725                 return ret;
8726         }
8727         tp_features.sensors_pdrv_attrs_registered = 1;
8728
8729
8730         /* Device initialization */
8731         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8732                                                         NULL, 0);
8733         if (IS_ERR(tpacpi_pdev)) {
8734                 ret = PTR_ERR(tpacpi_pdev);
8735                 tpacpi_pdev = NULL;
8736                 printk(TPACPI_ERR "unable to register platform device\n");
8737                 thinkpad_acpi_module_exit();
8738                 return ret;
8739         }
8740         tpacpi_sensors_pdev = platform_device_register_simple(
8741                                                 TPACPI_HWMON_DRVR_NAME,
8742                                                 -1, NULL, 0);
8743         if (IS_ERR(tpacpi_sensors_pdev)) {
8744                 ret = PTR_ERR(tpacpi_sensors_pdev);
8745                 tpacpi_sensors_pdev = NULL;
8746                 printk(TPACPI_ERR
8747                        "unable to register hwmon platform device\n");
8748                 thinkpad_acpi_module_exit();
8749                 return ret;
8750         }
8751         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8752                                  &dev_attr_thinkpad_acpi_pdev_name);
8753         if (ret) {
8754                 printk(TPACPI_ERR
8755                        "unable to create sysfs hwmon device attributes\n");
8756                 thinkpad_acpi_module_exit();
8757                 return ret;
8758         }
8759         tp_features.sensors_pdev_attrs_registered = 1;
8760         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8761         if (IS_ERR(tpacpi_hwmon)) {
8762                 ret = PTR_ERR(tpacpi_hwmon);
8763                 tpacpi_hwmon = NULL;
8764                 printk(TPACPI_ERR "unable to register hwmon device\n");
8765                 thinkpad_acpi_module_exit();
8766                 return ret;
8767         }
8768         mutex_init(&tpacpi_inputdev_send_mutex);
8769         tpacpi_inputdev = input_allocate_device();
8770         if (!tpacpi_inputdev) {
8771                 printk(TPACPI_ERR "unable to allocate input device\n");
8772                 thinkpad_acpi_module_exit();
8773                 return -ENOMEM;
8774         } else {
8775                 /* Prepare input device, but don't register */
8776                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8777                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8778                 tpacpi_inputdev->id.bustype = BUS_HOST;
8779                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8780                                                 thinkpad_id.vendor :
8781                                                 PCI_VENDOR_ID_IBM;
8782                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8783                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8784                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8785         }
8786         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8787                 ret = ibm_init(&ibms_init[i]);
8788                 if (ret >= 0 && *ibms_init[i].param)
8789                         ret = ibms_init[i].data->write(ibms_init[i].param);
8790                 if (ret < 0) {
8791                         thinkpad_acpi_module_exit();
8792                         return ret;
8793                 }
8794         }
8795         ret = input_register_device(tpacpi_inputdev);
8796         if (ret < 0) {
8797                 printk(TPACPI_ERR "unable to register input device\n");
8798                 thinkpad_acpi_module_exit();
8799                 return ret;
8800         } else {
8801                 tp_features.input_device_registered = 1;
8802         }
8803
8804         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8805         return 0;
8806 }
8807
8808 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8809
8810 /*
8811  * This will autoload the driver in almost every ThinkPad
8812  * in widespread use.
8813  *
8814  * Only _VERY_ old models, like the 240, 240x and 570 lack
8815  * the HKEY event interface.
8816  */
8817 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8818
8819 /*
8820  * DMI matching for module autoloading
8821  *
8822  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8823  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8824  *
8825  * Only models listed in thinkwiki will be supported, so add yours
8826  * if it is not there yet.
8827  */
8828 #define IBM_BIOS_MODULE_ALIAS(__type) \
8829         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8830
8831 /* Ancient thinkpad BIOSes have to be identified by
8832  * BIOS type or model number, and there are far less
8833  * BIOS types than model numbers... */
8834 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8835
8836 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8837 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8838 MODULE_DESCRIPTION(TPACPI_DESC);
8839 MODULE_VERSION(TPACPI_VERSION);
8840 MODULE_LICENSE("GPL");
8841
8842 module_init(thinkpad_acpi_module_init);
8843 module_exit(thinkpad_acpi_module_exit);