drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.24"
  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/seq_file.h>
  65 #include <linux/sysfs.h>
  66 #include <linux/backlight.h>
  67 #include <linux/fb.h>
  68 #include <linux/platform_device.h>
  69 #include <linux/hwmon.h>
  70 #include <linux/hwmon-sysfs.h>
  71 #include <linux/input.h>
  72 #include <linux/leds.h>
  73 #include <linux/rfkill.h>
  74 #include <asm/uaccess.h>
  75
  76 #include <linux/dmi.h>
  77 #include <linux/jiffies.h>
  78 #include <linux/workqueue.h>
  79
  80 #include <sound/core.h>
  81 #include <sound/control.h>
  82 #include <sound/initval.h>
  83
  84 #include <acpi/acpi_drivers.h>
  85
  86 #include <linux/pci_ids.h>
  87
  88
  89 /* ThinkPad CMOS commands */
  90 #define TP_CMOS_VOLUME_DOWN     0
  91 #define TP_CMOS_VOLUME_UP       1
  92 #define TP_CMOS_VOLUME_MUTE     2
  93 #define TP_CMOS_BRIGHTNESS_UP   4
  94 #define TP_CMOS_BRIGHTNESS_DOWN 5
  95 #define TP_CMOS_THINKLIGHT_ON   12
  96 #define TP_CMOS_THINKLIGHT_OFF  13
  97
  98 /* NVRAM Addresses */
  99 enum tp_nvram_addr {
 100         TP_NVRAM_ADDR_HK2               = 0x57,
 101         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
 102         TP_NVRAM_ADDR_VIDEO             = 0x59,
 103         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
 104         TP_NVRAM_ADDR_MIXER             = 0x60,
 105 };
 106
 107 /* NVRAM bit masks */
 108 enum {
 109         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 110         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 111         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 112         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 113         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 114         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 115         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 116         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 117         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 118         TP_NVRAM_MASK_MUTE              = 0x40,
 119         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 120         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 121         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 122 };
 123
 124 /* ACPI HIDs */
 125 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 126
 127 /* Input IDs */
 128 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 129 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 130
 131 /* ACPI \WGSV commands */
 132 enum {
 133         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 134         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 135         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 136         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 137 };
 138
 139 /* TP_ACPI_WGSV_GET_STATE bits */
 140 enum {
 141         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 142         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 143         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 144         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 145         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 146         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 147         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 148         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 149         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 150         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 151 };
 152
 153 /* HKEY events */
 154 enum tpacpi_hkey_event_t {
 155         /* Hotkey-related */
 156         TP_HKEY_EV_HOTKEY_BASE          = 0x1001, /* first hotkey (FN+F1) */
 157         TP_HKEY_EV_BRGHT_UP             = 0x1010, /* Brightness up */
 158         TP_HKEY_EV_BRGHT_DOWN           = 0x1011, /* Brightness down */
 159         TP_HKEY_EV_VOL_UP               = 0x1015, /* Volume up or unmute */
 160         TP_HKEY_EV_VOL_DOWN             = 0x1016, /* Volume down or unmute */
 161         TP_HKEY_EV_VOL_MUTE             = 0x1017, /* Mixer output mute */
 162
 163         /* Reasons for waking up from S3/S4 */
 164         TP_HKEY_EV_WKUP_S3_UNDOCK       = 0x2304, /* undock requested, S3 */
 165         TP_HKEY_EV_WKUP_S4_UNDOCK       = 0x2404, /* undock requested, S4 */
 166         TP_HKEY_EV_WKUP_S3_BAYEJ        = 0x2305, /* bay ejection req, S3 */
 167         TP_HKEY_EV_WKUP_S4_BAYEJ        = 0x2405, /* bay ejection req, S4 */
 168         TP_HKEY_EV_WKUP_S3_BATLOW       = 0x2313, /* battery empty, S3 */
 169         TP_HKEY_EV_WKUP_S4_BATLOW       = 0x2413, /* battery empty, S4 */
 170
 171         /* Auto-sleep after eject request */
 172         TP_HKEY_EV_BAYEJ_ACK            = 0x3003, /* bay ejection complete */
 173         TP_HKEY_EV_UNDOCK_ACK           = 0x4003, /* undock complete */
 174
 175         /* Misc bay events */
 176         TP_HKEY_EV_OPTDRV_EJ            = 0x3006, /* opt. drive tray ejected */
 177
 178         /* User-interface events */
 179         TP_HKEY_EV_LID_CLOSE            = 0x5001, /* laptop lid closed */
 180         TP_HKEY_EV_LID_OPEN             = 0x5002, /* laptop lid opened */
 181         TP_HKEY_EV_TABLET_TABLET        = 0x5009, /* tablet swivel up */
 182         TP_HKEY_EV_TABLET_NOTEBOOK      = 0x500a, /* tablet swivel down */
 183         TP_HKEY_EV_PEN_INSERTED         = 0x500b, /* tablet pen inserted */
 184         TP_HKEY_EV_PEN_REMOVED          = 0x500c, /* tablet pen removed */
 185         TP_HKEY_EV_BRGHT_CHANGED        = 0x5010, /* backlight control event */
 186
 187         /* Thermal events */
 188         TP_HKEY_EV_ALARM_BAT_HOT        = 0x6011, /* battery too hot */
 189         TP_HKEY_EV_ALARM_BAT_XHOT       = 0x6012, /* battery critically hot */
 190         TP_HKEY_EV_ALARM_SENSOR_HOT     = 0x6021, /* sensor too hot */
 191         TP_HKEY_EV_ALARM_SENSOR_XHOT    = 0x6022, /* sensor critically hot */
 192         TP_HKEY_EV_THM_TABLE_CHANGED    = 0x6030, /* thermal table changed */
 193
 194         /* Misc */
 195         TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
 196 };
 197
 198 /****************************************************************************
 199  * Main driver
 200  */
 201
 202 #define TPACPI_NAME "thinkpad"
 203 #define TPACPI_DESC "ThinkPad ACPI Extras"
 204 #define TPACPI_FILE TPACPI_NAME "_acpi"
 205 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 206 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 207
 208 #define TPACPI_PROC_DIR "ibm"
 209 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 210 #define TPACPI_DRVR_NAME TPACPI_FILE
 211 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 212 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 213
 214 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 215 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 216
 217 #define TPACPI_MAX_ACPI_ARGS 3
 218
 219 /* printk headers */
 220 #define TPACPI_LOG TPACPI_FILE ": "
 221 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 222 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 223 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 224 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 225 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 226 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 227 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 228 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 229
 230 /* Debugging printk groups */
 231 #define TPACPI_DBG_ALL          0xffff
 232 #define TPACPI_DBG_DISCLOSETASK 0x8000
 233 #define TPACPI_DBG_INIT         0x0001
 234 #define TPACPI_DBG_EXIT         0x0002
 235 #define TPACPI_DBG_RFKILL       0x0004
 236 #define TPACPI_DBG_HKEY         0x0008
 237 #define TPACPI_DBG_FAN          0x0010
 238 #define TPACPI_DBG_BRGHT        0x0020
 239 #define TPACPI_DBG_MIXER        0x0040
 240
 241 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 242 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 243 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 244
 245
 246 /****************************************************************************
 247  * Driver-wide structs and misc. variables
 248  */
 249
 250 struct ibm_struct;
 251
 252 struct tp_acpi_drv_struct {
 253         const struct acpi_device_id *hid;
 254         struct acpi_driver *driver;
 255
 256         void (*notify) (struct ibm_struct *, u32);
 257         acpi_handle *handle;
 258         u32 type;
 259         struct acpi_device *device;
 260 };
 261
 262 struct ibm_struct {
 263         char *name;
 264
 265         int (*read) (struct seq_file *);
 266         int (*write) (char *);
 267         void (*exit) (void);
 268         void (*resume) (void);
 269         void (*suspend) (pm_message_t state);
 270         void (*shutdown) (void);
 271
 272         struct list_head all_drivers;
 273
 274         struct tp_acpi_drv_struct *acpi;
 275
 276         struct {
 277                 u8 acpi_driver_registered:1;
 278                 u8 acpi_notify_installed:1;
 279                 u8 proc_created:1;
 280                 u8 init_called:1;
 281                 u8 experimental:1;
 282         } flags;
 283 };
 284
 285 struct ibm_init_struct {
 286         char param[32];
 287
 288         int (*init) (struct ibm_init_struct *);
 289         struct ibm_struct *data;
 290 };
 291
 292 static struct {
 293         u32 bluetooth:1;
 294         u32 hotkey:1;
 295         u32 hotkey_mask:1;
 296         u32 hotkey_wlsw:1;
 297         u32 hotkey_tablet:1;
 298         u32 light:1;
 299         u32 light_status:1;
 300         u32 bright_16levels:1;
 301         u32 bright_acpimode:1;
 302         u32 wan:1;
 303         u32 uwb:1;
 304         u32 fan_ctrl_status_undef:1;
 305         u32 second_fan:1;
 306         u32 beep_needs_two_args:1;
 307         u32 mixer_no_level_control:1;
 308         u32 input_device_registered:1;
 309         u32 platform_drv_registered:1;
 310         u32 platform_drv_attrs_registered:1;
 311         u32 sensors_pdrv_registered:1;
 312         u32 sensors_pdrv_attrs_registered:1;
 313         u32 sensors_pdev_attrs_registered:1;
 314         u32 hotkey_poll_active:1;
 315 } tp_features;
 316
 317 static struct {
 318         u16 hotkey_mask_ff:1;
 319         u16 volume_ctrl_forbidden:1;
 320 } tp_warned;
 321
 322 struct thinkpad_id_data {
 323         unsigned int vendor;    /* ThinkPad vendor:
 324                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 325
 326         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 327         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 328
 329         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 330         u16 ec_model;
 331         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 332         u16 ec_release;
 333
 334         char *model_str;        /* ThinkPad T43 */
 335         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 336 };
 337 static struct thinkpad_id_data thinkpad_id;
 338
 339 static enum {
 340         TPACPI_LIFE_INIT = 0,
 341         TPACPI_LIFE_RUNNING,
 342         TPACPI_LIFE_EXITING,
 343 } tpacpi_lifecycle;
 344
 345 static int experimental;
 346 static u32 dbg_level;
 347
 348 static struct workqueue_struct *tpacpi_wq;
 349
 350 enum led_status_t {
 351         TPACPI_LED_OFF = 0,
 352         TPACPI_LED_ON,
 353         TPACPI_LED_BLINK,
 354 };
 355
 356 /* Special LED class that can defer work */
 357 struct tpacpi_led_classdev {
 358         struct led_classdev led_classdev;
 359         struct work_struct work;
 360         enum led_status_t new_state;
 361         unsigned int led;
 362 };
 363
 364 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 365 static int dbg_wlswemul;
 366 static int tpacpi_wlsw_emulstate;
 367 static int dbg_bluetoothemul;
 368 static int tpacpi_bluetooth_emulstate;
 369 static int dbg_wwanemul;
 370 static int tpacpi_wwan_emulstate;
 371 static int dbg_uwbemul;
 372 static int tpacpi_uwb_emulstate;
 373 #endif
 374
 375
 376 /*************************************************************************
 377  *  Debugging helpers
 378  */
 379
 380 #define dbg_printk(a_dbg_level, format, arg...) \
 381         do { if (dbg_level & (a_dbg_level)) \
 382                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 383         } while (0)
 384
 385 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 386 #define vdbg_printk dbg_printk
 387 static const char *str_supported(int is_supported);
 388 #else
 389 #define vdbg_printk(a_dbg_level, format, arg...) \
 390         do { } while (0)
 391 #endif
 392
 393 static void tpacpi_log_usertask(const char * const what)
 394 {
 395         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 396                 what, task_tgid_vnr(current));
 397 }
 398
 399 #define tpacpi_disclose_usertask(what, format, arg...) \
 400         do { \
 401                 if (unlikely( \
 402                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 403                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 404                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 405                                 what, task_tgid_vnr(current), ## arg); \
 406                 } \
 407         } while (0)
 408
 409 /*
 410  * Quirk handling helpers
 411  *
 412  * ThinkPad IDs and versions seen in the field so far
 413  * are two-characters from the set [0-9A-Z], i.e. base 36.
 414  *
 415  * We use values well outside that range as specials.
 416  */
 417
 418 #define TPACPI_MATCH_ANY                0xffffU
 419 #define TPACPI_MATCH_UNKNOWN            0U
 420
 421 /* TPID('1', 'Y') == 0x5931 */
 422 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 423
 424 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 425         { .vendor = PCI_VENDOR_ID_IBM,          \
 426           .bios = TPID(__id1, __id2),           \
 427           .ec = TPACPI_MATCH_ANY,               \
 428           .quirks = (__quirk) }
 429
 430 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 431         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 432           .bios = TPID(__id1, __id2),           \
 433           .ec = TPACPI_MATCH_ANY,               \
 434           .quirks = (__quirk) }
 435
 436 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)   \
 437         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 438           .bios = TPACPI_MATCH_ANY,             \
 439           .ec = TPID(__id1, __id2),             \
 440           .quirks = (__quirk) }
 441
 442 struct tpacpi_quirk {
 443         unsigned int vendor;
 444         u16 bios;
 445         u16 ec;
 446         unsigned long quirks;
 447 };
 448
 449 /**
 450  * tpacpi_check_quirks() - search BIOS/EC version on a list
 451  * @qlist:              array of &struct tpacpi_quirk
 452  * @qlist_size:         number of elements in @qlist
 453  *
 454  * Iterates over a quirks list until one is found that matches the
 455  * ThinkPad's vendor, BIOS and EC model.
 456  *
 457  * Returns 0 if nothing matches, otherwise returns the quirks field of
 458  * the matching &struct tpacpi_quirk entry.
 459  *
 460  * The match criteria is: vendor, ec and bios much match.
 461  */
 462 static unsigned long __init tpacpi_check_quirks(
 463                         const struct tpacpi_quirk *qlist,
 464                         unsigned int qlist_size)
 465 {
 466         while (qlist_size) {
 467                 if ((qlist->vendor == thinkpad_id.vendor ||
 468                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 469                     (qlist->bios == thinkpad_id.bios_model ||
 470                                 qlist->bios == TPACPI_MATCH_ANY) &&
 471                     (qlist->ec == thinkpad_id.ec_model ||
 472                                 qlist->ec == TPACPI_MATCH_ANY))
 473                         return qlist->quirks;
 474
 475                 qlist_size--;
 476                 qlist++;
 477         }
 478         return 0;
 479 }
 480
 481
 482 /****************************************************************************
 483  ****************************************************************************
 484  *
 485  * ACPI Helpers and device model
 486  *
 487  ****************************************************************************
 488  ****************************************************************************/
 489
 490 /*************************************************************************
 491  * ACPI basic handles
 492  */
 493
 494 static acpi_handle root_handle;
 495
 496 #define TPACPI_HANDLE(object, parent, paths...)                 \
 497         static acpi_handle  object##_handle;                    \
 498         static acpi_handle *object##_parent = &parent##_handle; \
 499         static char        *object##_path;                      \
 500         static char        *object##_paths[] = { paths }
 501
 502 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 503            "\\_SB.PCI.ISA.EC",  /* 570 */
 504            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 505            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 506            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 507            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 508            "\\_SB.PCI0.LPC.EC", /* all others */
 509            );
 510
 511 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 512 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 513
 514 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 515                                         /* T4x, X31, X40 */
 516            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 517            "\\CMS",             /* R40, R40e */
 518            );                   /* all others */
 519
 520 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 521            "^HKEY",             /* R30, R31 */
 522            "HKEY",              /* all others */
 523            );                   /* 570 */
 524
 525 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 526            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 527            "\\_SB.PCI0.VID0",   /* 770e */
 528            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 529            "\\_SB.PCI0.AGP.VID",        /* all others */
 530            );                           /* R30, R31 */
 531
 532
 533 /*************************************************************************
 534  * ACPI helpers
 535  */
 536
 537 static int acpi_evalf(acpi_handle handle,
 538                       void *res, char *method, char *fmt, ...)
 539 {
 540         char *fmt0 = fmt;
 541         struct acpi_object_list params;
 542         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 543         struct acpi_buffer result, *resultp;
 544         union acpi_object out_obj;
 545         acpi_status status;
 546         va_list ap;
 547         char res_type;
 548         int success;
 549         int quiet;
 550
 551         if (!*fmt) {
 552                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 553                 return 0;
 554         }
 555
 556         if (*fmt == 'q') {
 557                 quiet = 1;
 558                 fmt++;
 559         } else
 560                 quiet = 0;
 561
 562         res_type = *(fmt++);
 563
 564         params.count = 0;
 565         params.pointer = &in_objs[0];
 566
 567         va_start(ap, fmt);
 568         while (*fmt) {
 569                 char c = *(fmt++);
 570                 switch (c) {
 571                 case 'd':       /* int */
 572                         in_objs[params.count].integer.value = va_arg(ap, int);
 573                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 574                         break;
 575                         /* add more types as needed */
 576                 default:
 577                         printk(TPACPI_ERR "acpi_evalf() called "
 578                                "with invalid format character '%c'\n", c);
 579                         return 0;
 580                 }
 581         }
 582         va_end(ap);
 583
 584         if (res_type != 'v') {
 585                 result.length = sizeof(out_obj);
 586                 result.pointer = &out_obj;
 587                 resultp = &result;
 588         } else
 589                 resultp = NULL;
 590
 591         status = acpi_evaluate_object(handle, method, &params, resultp);
 592
 593         switch (res_type) {
 594         case 'd':               /* int */
 595                 if (res)
 596                         *(int *)res = out_obj.integer.value;
 597                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 598                 break;
 599         case 'v':               /* void */
 600                 success = status == AE_OK;
 601                 break;
 602                 /* add more types as needed */
 603         default:
 604                 printk(TPACPI_ERR "acpi_evalf() called "
 605                        "with invalid format character '%c'\n", res_type);
 606                 return 0;
 607         }
 608
 609         if (!success && !quiet)
 610                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 611                        method, fmt0, status);
 612
 613         return success;
 614 }
 615
 616 static int acpi_ec_read(int i, u8 *p)
 617 {
 618         int v;
 619
 620         if (ecrd_handle) {
 621                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 622                         return 0;
 623                 *p = v;
 624         } else {
 625                 if (ec_read(i, p) < 0)
 626                         return 0;
 627         }
 628
 629         return 1;
 630 }
 631
 632 static int acpi_ec_write(int i, u8 v)
 633 {
 634         if (ecwr_handle) {
 635                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 636                         return 0;
 637         } else {
 638                 if (ec_write(i, v) < 0)
 639                         return 0;
 640         }
 641
 642         return 1;
 643 }
 644
 645 static int issue_thinkpad_cmos_command(int cmos_cmd)
 646 {
 647         if (!cmos_handle)
 648                 return -ENXIO;
 649
 650         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 651                 return -EIO;
 652
 653         return 0;
 654 }
 655
 656 /*************************************************************************
 657  * ACPI device model
 658  */
 659
 660 #define TPACPI_ACPIHANDLE_INIT(object) \
 661         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 662                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 663
 664 static void drv_acpi_handle_init(char *name,
 665                            acpi_handle *handle, acpi_handle parent,
 666                            char **paths, int num_paths, char **path)
 667 {
 668         int i;
 669         acpi_status status;
 670
 671         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 672                 name);
 673
 674         for (i = 0; i < num_paths; i++) {
 675                 status = acpi_get_handle(parent, paths[i], handle);
 676                 if (ACPI_SUCCESS(status)) {
 677                         *path = paths[i];
 678                         dbg_printk(TPACPI_DBG_INIT,
 679                                    "Found ACPI handle %s for %s\n",
 680                                    *path, name);
 681                         return;
 682                 }
 683         }
 684
 685         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 686                     name);
 687         *handle = NULL;
 688 }
 689
 690 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 691 {
 692         struct ibm_struct *ibm = data;
 693
 694         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 695                 return;
 696
 697         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 698                 return;
 699
 700         ibm->acpi->notify(ibm, event);
 701 }
 702
 703 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 704 {
 705         acpi_status status;
 706         int rc;
 707
 708         BUG_ON(!ibm->acpi);
 709
 710         if (!*ibm->acpi->handle)
 711                 return 0;
 712
 713         vdbg_printk(TPACPI_DBG_INIT,
 714                 "setting up ACPI notify for %s\n", ibm->name);
 715
 716         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 717         if (rc < 0) {
 718                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 719                         ibm->name, rc);
 720                 return -ENODEV;
 721         }
 722
 723         ibm->acpi->device->driver_data = ibm;
 724         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 725                 TPACPI_ACPI_EVENT_PREFIX,
 726                 ibm->name);
 727
 728         status = acpi_install_notify_handler(*ibm->acpi->handle,
 729                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 730         if (ACPI_FAILURE(status)) {
 731                 if (status == AE_ALREADY_EXISTS) {
 732                         printk(TPACPI_NOTICE
 733                                "another device driver is already "
 734                                "handling %s events\n", ibm->name);
 735                 } else {
 736                         printk(TPACPI_ERR
 737                                "acpi_install_notify_handler(%s) failed: %d\n",
 738                                ibm->name, status);
 739                 }
 740                 return -ENODEV;
 741         }
 742         ibm->flags.acpi_notify_installed = 1;
 743         return 0;
 744 }
 745
 746 static int __init tpacpi_device_add(struct acpi_device *device)
 747 {
 748         return 0;
 749 }
 750
 751 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 752 {
 753         int rc;
 754
 755         dbg_printk(TPACPI_DBG_INIT,
 756                 "registering %s as an ACPI driver\n", ibm->name);
 757
 758         BUG_ON(!ibm->acpi);
 759
 760         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 761         if (!ibm->acpi->driver) {
 762                 printk(TPACPI_ERR
 763                        "failed to allocate memory for ibm->acpi->driver\n");
 764                 return -ENOMEM;
 765         }
 766
 767         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 768         ibm->acpi->driver->ids = ibm->acpi->hid;
 769
 770         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 771
 772         rc = acpi_bus_register_driver(ibm->acpi->driver);
 773         if (rc < 0) {
 774                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 775                        ibm->name, rc);
 776                 kfree(ibm->acpi->driver);
 777                 ibm->acpi->driver = NULL;
 778         } else if (!rc)
 779                 ibm->flags.acpi_driver_registered = 1;
 780
 781         return rc;
 782 }
 783
 784
 785 /****************************************************************************
 786  ****************************************************************************
 787  *
 788  * Procfs Helpers
 789  *
 790  ****************************************************************************
 791  ****************************************************************************/
 792
 793 static int dispatch_proc_show(struct seq_file *m, void *v)
 794 {
 795         struct ibm_struct *ibm = m->private;
 796
 797         if (!ibm || !ibm->read)
 798                 return -EINVAL;
 799         return ibm->read(m);
 800 }
 801
 802 static int dispatch_proc_open(struct inode *inode, struct file *file)
 803 {
 804         return single_open(file, dispatch_proc_show, PDE(inode)->data);
 805 }
 806
 807 static ssize_t dispatch_proc_write(struct file *file,
 808                         const char __user *userbuf,
 809                         size_t count, loff_t *pos)
 810 {
 811         struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data;
 812         char *kernbuf;
 813         int ret;
 814
 815         if (!ibm || !ibm->write)
 816                 return -EINVAL;
 817         if (count > PAGE_SIZE - 2)
 818                 return -EINVAL;
 819
 820         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 821         if (!kernbuf)
 822                 return -ENOMEM;
 823
 824         if (copy_from_user(kernbuf, userbuf, count)) {
 825                 kfree(kernbuf);
 826                 return -EFAULT;
 827         }
 828
 829         kernbuf[count] = 0;
 830         strcat(kernbuf, ",");
 831         ret = ibm->write(kernbuf);
 832         if (ret == 0)
 833                 ret = count;
 834
 835         kfree(kernbuf);
 836
 837         return ret;
 838 }
 839
 840 static const struct file_operations dispatch_proc_fops = {
 841         .owner          = THIS_MODULE,
 842         .open           = dispatch_proc_open,
 843         .read           = seq_read,
 844         .llseek         = seq_lseek,
 845         .release        = single_release,
 846         .write          = dispatch_proc_write,
 847 };
 848
 849 static char *next_cmd(char **cmds)
 850 {
 851         char *start = *cmds;
 852         char *end;
 853
 854         while ((end = strchr(start, ',')) && end == start)
 855                 start = end + 1;
 856
 857         if (!end)
 858                 return NULL;
 859
 860         *end = 0;
 861         *cmds = end + 1;
 862         return start;
 863 }
 864
 865
 866 /****************************************************************************
 867  ****************************************************************************
 868  *
 869  * Device model: input, hwmon and platform
 870  *
 871  ****************************************************************************
 872  ****************************************************************************/
 873
 874 static struct platform_device *tpacpi_pdev;
 875 static struct platform_device *tpacpi_sensors_pdev;
 876 static struct device *tpacpi_hwmon;
 877 static struct input_dev *tpacpi_inputdev;
 878 static struct mutex tpacpi_inputdev_send_mutex;
 879 static LIST_HEAD(tpacpi_all_drivers);
 880
 881 static int tpacpi_suspend_handler(struct platform_device *pdev,
 882                                   pm_message_t state)
 883 {
 884         struct ibm_struct *ibm, *itmp;
 885
 886         list_for_each_entry_safe(ibm, itmp,
 887                                  &tpacpi_all_drivers,
 888                                  all_drivers) {
 889                 if (ibm->suspend)
 890                         (ibm->suspend)(state);
 891         }
 892
 893         return 0;
 894 }
 895
 896 static int tpacpi_resume_handler(struct platform_device *pdev)
 897 {
 898         struct ibm_struct *ibm, *itmp;
 899
 900         list_for_each_entry_safe(ibm, itmp,
 901                                  &tpacpi_all_drivers,
 902                                  all_drivers) {
 903                 if (ibm->resume)
 904                         (ibm->resume)();
 905         }
 906
 907         return 0;
 908 }
 909
 910 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 911 {
 912         struct ibm_struct *ibm, *itmp;
 913
 914         list_for_each_entry_safe(ibm, itmp,
 915                                  &tpacpi_all_drivers,
 916                                  all_drivers) {
 917                 if (ibm->shutdown)
 918                         (ibm->shutdown)();
 919         }
 920 }
 921
 922 static struct platform_driver tpacpi_pdriver = {
 923         .driver = {
 924                 .name = TPACPI_DRVR_NAME,
 925                 .owner = THIS_MODULE,
 926         },
 927         .suspend = tpacpi_suspend_handler,
 928         .resume = tpacpi_resume_handler,
 929         .shutdown = tpacpi_shutdown_handler,
 930 };
 931
 932 static struct platform_driver tpacpi_hwmon_pdriver = {
 933         .driver = {
 934                 .name = TPACPI_HWMON_DRVR_NAME,
 935                 .owner = THIS_MODULE,
 936         },
 937 };
 938
 939 /*************************************************************************
 940  * sysfs support helpers
 941  */
 942
 943 struct attribute_set {
 944         unsigned int members, max_members;
 945         struct attribute_group group;
 946 };
 947
 948 struct attribute_set_obj {
 949         struct attribute_set s;
 950         struct attribute *a;
 951 } __attribute__((packed));
 952
 953 static struct attribute_set *create_attr_set(unsigned int max_members,
 954                                                 const char *name)
 955 {
 956         struct attribute_set_obj *sobj;
 957
 958         if (max_members == 0)
 959                 return NULL;
 960
 961         /* Allocates space for implicit NULL at the end too */
 962         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 963                     max_members * sizeof(struct attribute *),
 964                     GFP_KERNEL);
 965         if (!sobj)
 966                 return NULL;
 967         sobj->s.max_members = max_members;
 968         sobj->s.group.attrs = &sobj->a;
 969         sobj->s.group.name = name;
 970
 971         return &sobj->s;
 972 }
 973
 974 #define destroy_attr_set(_set) \
 975         kfree(_set);
 976
 977 /* not multi-threaded safe, use it in a single thread per set */
 978 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 979 {
 980         if (!s || !attr)
 981                 return -EINVAL;
 982
 983         if (s->members >= s->max_members)
 984                 return -ENOMEM;
 985
 986         s->group.attrs[s->members] = attr;
 987         s->members++;
 988
 989         return 0;
 990 }
 991
 992 static int add_many_to_attr_set(struct attribute_set *s,
 993                         struct attribute **attr,
 994                         unsigned int count)
 995 {
 996         int i, res;
 997
 998         for (i = 0; i < count; i++) {
 999                 res = add_to_attr_set(s, attr[i]);
1000                 if (res)
1001                         return res;
1002         }
1003
1004         return 0;
1005 }
1006
1007 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
1008 {
1009         sysfs_remove_group(kobj, &s->group);
1010         destroy_attr_set(s);
1011 }
1012
1013 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
1014         sysfs_create_group(_kobj, &_attr_set->group)
1015
1016 static int parse_strtoul(const char *buf,
1017                 unsigned long max, unsigned long *value)
1018 {
1019         char *endp;
1020
1021         *value = simple_strtoul(skip_spaces(buf), &endp, 0);
1022         endp = skip_spaces(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, 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, struct seq_file *m)
1401 {
1402         if (id >= TPACPI_RFK_SW_MAX)
1403                 seq_printf(m, "status:\t\tnot supported\n");
1404         else {
1405                 int status;
1406
1407                 /* This is in the ABI... */
1408                 if (tpacpi_rfk_check_hwblock_state()) {
1409                         status = TPACPI_RFK_RADIO_OFF;
1410                 } else {
1411                         status = tpacpi_rfk_update_swstate(
1412                                                 tpacpi_rfkill_switches[id]);
1413                         if (status < 0)
1414                                 return status;
1415                 }
1416
1417                 seq_printf(m, "status:\t\t%s\n",
1418                                 (status == TPACPI_RFK_RADIO_ON) ?
1419                                         "enabled" : "disabled");
1420                 seq_printf(m, "commands:\tenable, disable\n");
1421         }
1422
1423         return 0;
1424 }
1425
1426 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1427 {
1428         char *cmd;
1429         int status = -1;
1430         int res = 0;
1431
1432         if (id >= TPACPI_RFK_SW_MAX)
1433                 return -ENODEV;
1434
1435         while ((cmd = next_cmd(&buf))) {
1436                 if (strlencmp(cmd, "enable") == 0)
1437                         status = TPACPI_RFK_RADIO_ON;
1438                 else if (strlencmp(cmd, "disable") == 0)
1439                         status = TPACPI_RFK_RADIO_OFF;
1440                 else
1441                         return -EINVAL;
1442         }
1443
1444         if (status != -1) {
1445                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1446                                 (status == TPACPI_RFK_RADIO_ON) ?
1447                                                 "enable" : "disable",
1448                                 tpacpi_rfkill_names[id]);
1449                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1450                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1451         }
1452
1453         return res;
1454 }
1455
1456 /*************************************************************************
1457  * thinkpad-acpi driver attributes
1458  */
1459
1460 /* interface_version --------------------------------------------------- */
1461 static ssize_t tpacpi_driver_interface_version_show(
1462                                 struct device_driver *drv,
1463                                 char *buf)
1464 {
1465         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1466 }
1467
1468 static DRIVER_ATTR(interface_version, S_IRUGO,
1469                 tpacpi_driver_interface_version_show, NULL);
1470
1471 /* debug_level --------------------------------------------------------- */
1472 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1473                                                 char *buf)
1474 {
1475         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1476 }
1477
1478 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1479                                                 const char *buf, size_t count)
1480 {
1481         unsigned long t;
1482
1483         if (parse_strtoul(buf, 0xffff, &t))
1484                 return -EINVAL;
1485
1486         dbg_level = t;
1487
1488         return count;
1489 }
1490
1491 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1492                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1493
1494 /* version ------------------------------------------------------------- */
1495 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1496                                                 char *buf)
1497 {
1498         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1499                         TPACPI_DESC, TPACPI_VERSION);
1500 }
1501
1502 static DRIVER_ATTR(version, S_IRUGO,
1503                 tpacpi_driver_version_show, NULL);
1504
1505 /* --------------------------------------------------------------------- */
1506
1507 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1508
1509 /* wlsw_emulstate ------------------------------------------------------ */
1510 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1511                                                 char *buf)
1512 {
1513         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1514 }
1515
1516 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1517                                                 const char *buf, size_t count)
1518 {
1519         unsigned long t;
1520
1521         if (parse_strtoul(buf, 1, &t))
1522                 return -EINVAL;
1523
1524         if (tpacpi_wlsw_emulstate != !!t) {
1525                 tpacpi_wlsw_emulstate = !!t;
1526                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1527         }
1528
1529         return count;
1530 }
1531
1532 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1533                 tpacpi_driver_wlsw_emulstate_show,
1534                 tpacpi_driver_wlsw_emulstate_store);
1535
1536 /* bluetooth_emulstate ------------------------------------------------- */
1537 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1538                                         struct device_driver *drv,
1539                                         char *buf)
1540 {
1541         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1542 }
1543
1544 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1545                                         struct device_driver *drv,
1546                                         const char *buf, size_t count)
1547 {
1548         unsigned long t;
1549
1550         if (parse_strtoul(buf, 1, &t))
1551                 return -EINVAL;
1552
1553         tpacpi_bluetooth_emulstate = !!t;
1554
1555         return count;
1556 }
1557
1558 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1559                 tpacpi_driver_bluetooth_emulstate_show,
1560                 tpacpi_driver_bluetooth_emulstate_store);
1561
1562 /* wwan_emulstate ------------------------------------------------- */
1563 static ssize_t tpacpi_driver_wwan_emulstate_show(
1564                                         struct device_driver *drv,
1565                                         char *buf)
1566 {
1567         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1568 }
1569
1570 static ssize_t tpacpi_driver_wwan_emulstate_store(
1571                                         struct device_driver *drv,
1572                                         const char *buf, size_t count)
1573 {
1574         unsigned long t;
1575
1576         if (parse_strtoul(buf, 1, &t))
1577                 return -EINVAL;
1578
1579         tpacpi_wwan_emulstate = !!t;
1580
1581         return count;
1582 }
1583
1584 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1585                 tpacpi_driver_wwan_emulstate_show,
1586                 tpacpi_driver_wwan_emulstate_store);
1587
1588 /* uwb_emulstate ------------------------------------------------- */
1589 static ssize_t tpacpi_driver_uwb_emulstate_show(
1590                                         struct device_driver *drv,
1591                                         char *buf)
1592 {
1593         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1594 }
1595
1596 static ssize_t tpacpi_driver_uwb_emulstate_store(
1597                                         struct device_driver *drv,
1598                                         const char *buf, size_t count)
1599 {
1600         unsigned long t;
1601
1602         if (parse_strtoul(buf, 1, &t))
1603                 return -EINVAL;
1604
1605         tpacpi_uwb_emulstate = !!t;
1606
1607         return count;
1608 }
1609
1610 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1611                 tpacpi_driver_uwb_emulstate_show,
1612                 tpacpi_driver_uwb_emulstate_store);
1613 #endif
1614
1615 /* --------------------------------------------------------------------- */
1616
1617 static struct driver_attribute *tpacpi_driver_attributes[] = {
1618         &driver_attr_debug_level, &driver_attr_version,
1619         &driver_attr_interface_version,
1620 };
1621
1622 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1623 {
1624         int i, res;
1625
1626         i = 0;
1627         res = 0;
1628         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1629                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1630                 i++;
1631         }
1632
1633 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1634         if (!res && dbg_wlswemul)
1635                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1636         if (!res && dbg_bluetoothemul)
1637                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1638         if (!res && dbg_wwanemul)
1639                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1640         if (!res && dbg_uwbemul)
1641                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1642 #endif
1643
1644         return res;
1645 }
1646
1647 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1648 {
1649         int i;
1650
1651         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1652                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1653
1654 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1655         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1656         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1657         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1658         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1659 #endif
1660 }
1661
1662 /*************************************************************************
1663  * Firmware Data
1664  */
1665
1666 /*
1667  * Table of recommended minimum BIOS versions
1668  *
1669  * Reasons for listing:
1670  *    1. Stable BIOS, listed because the unknown ammount of
1671  *       bugs and bad ACPI behaviour on older versions
1672  *
1673  *    2. BIOS or EC fw with known bugs that trigger on Linux
1674  *
1675  *    3. BIOS with known reduced functionality in older versions
1676  *
1677  *  We recommend the latest BIOS and EC version.
1678  *  We only support the latest BIOS and EC fw version as a rule.
1679  *
1680  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1681  *  Information from users in ThinkWiki
1682  *
1683  *  WARNING: we use this table also to detect that the machine is
1684  *  a ThinkPad in some cases, so don't remove entries lightly.
1685  */
1686
1687 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1688         { .vendor       = (__v),                        \
1689           .bios         = TPID(__id1, __id2),           \
1690           .ec           = TPACPI_MATCH_ANY,             \
1691           .quirks       = TPACPI_MATCH_ANY << 16        \
1692                           | (__bv1) << 8 | (__bv2) }
1693
1694 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1695                 __eid, __ev1, __ev2)                    \
1696         { .vendor       = (__v),                        \
1697           .bios         = TPID(__bid1, __bid2),         \
1698           .ec           = __eid,                        \
1699           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1700                           | (__bv1) << 8 | (__bv2) }
1701
1702 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1703         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1704
1705 /* Outdated IBM BIOSes often lack the EC id string */
1706 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1707         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1708                 __bv1, __bv2, TPID(__id1, __id2),       \
1709                 __ev1, __ev2),                          \
1710         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1711                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1712                 __ev1, __ev2)
1713
1714 /* Outdated IBM BIOSes often lack the EC id string */
1715 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1716                 __eid1, __eid2, __ev1, __ev2)           \
1717         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1718                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1719                 __ev1, __ev2),                          \
1720         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1721                 __bv1, __bv2, TPACPI_MATCH_UNKNOWN,     \
1722                 __ev1, __ev2)
1723
1724 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1725         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1726
1727 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1728         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1729                 __bv1, __bv2, TPID(__id1, __id2),       \
1730                 __ev1, __ev2)
1731
1732 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1733                 __eid1, __eid2, __ev1, __ev2)           \
1734         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1735                 __bv1, __bv2, TPID(__eid1, __eid2),     \
1736                 __ev1, __ev2)
1737
1738 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1739         /*  Numeric models ------------------ */
1740         /*      FW MODEL   BIOS VERS          */
1741         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1742         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1743         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1744         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1745         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1746         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1747         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1748         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1749         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1750
1751         /* A-series ------------------------- */
1752         /*      FW MODEL   BIOS VERS  EC VERS */
1753         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1754         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1755         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1756         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1757         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1758         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1759         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1760         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1761         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1762         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1763         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1764
1765         /* G-series ------------------------- */
1766         /*      FW MODEL   BIOS VERS          */
1767         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1768         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1769
1770         /* R-series, T-series --------------- */
1771         /*      FW MODEL   BIOS VERS  EC VERS */
1772         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1773         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1774         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1775         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1776         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1777         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1778         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1779                                                     T40/p, T41/p, T42/p (1) */
1780         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1781         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1782         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1783         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1784
1785         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1786         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1787         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1788         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1789         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1790         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1791
1792         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1793         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1794         TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1795
1796         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1797         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1798         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1799
1800         /* X-series ------------------------- */
1801         /*      FW MODEL   BIOS VERS  EC VERS */
1802         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1803         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1804         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1805         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1806         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1807         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1808         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1809
1810         TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1811         TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1812
1813         /* (0) - older versions lack DMI EC fw string and functionality */
1814         /* (1) - older versions known to lack functionality */
1815 };
1816
1817 #undef TPV_QL1
1818 #undef TPV_QL0
1819 #undef TPV_QI2
1820 #undef TPV_QI1
1821 #undef TPV_QI0
1822 #undef TPV_Q_X
1823 #undef TPV_Q
1824
1825 static void __init tpacpi_check_outdated_fw(void)
1826 {
1827         unsigned long fwvers;
1828         u16 ec_version, bios_version;
1829
1830         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1831                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1832
1833         if (!fwvers)
1834                 return;
1835
1836         bios_version = fwvers & 0xffffU;
1837         ec_version = (fwvers >> 16) & 0xffffU;
1838
1839         /* note that unknown versions are set to 0x0000 and we use that */
1840         if ((bios_version > thinkpad_id.bios_release) ||
1841             (ec_version > thinkpad_id.ec_release &&
1842                                 ec_version != TPACPI_MATCH_ANY)) {
1843                 /*
1844                  * The changelogs would let us track down the exact
1845                  * reason, but it is just too much of a pain to track
1846                  * it.  We only list BIOSes that are either really
1847                  * broken, or really stable to begin with, so it is
1848                  * best if the user upgrades the firmware anyway.
1849                  */
1850                 printk(TPACPI_WARN
1851                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1852                 printk(TPACPI_WARN
1853                         "WARNING: This firmware may be missing critical bug "
1854                         "fixes and/or important features\n");
1855         }
1856 }
1857
1858 static bool __init tpacpi_is_fw_known(void)
1859 {
1860         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1861                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1862 }
1863
1864 /****************************************************************************
1865  ****************************************************************************
1866  *
1867  * Subdrivers
1868  *
1869  ****************************************************************************
1870  ****************************************************************************/
1871
1872 /*************************************************************************
1873  * thinkpad-acpi init subdriver
1874  */
1875
1876 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1877 {
1878         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1879         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1880
1881         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1882                 (thinkpad_id.bios_version_str) ?
1883                         thinkpad_id.bios_version_str : "unknown",
1884                 (thinkpad_id.ec_version_str) ?
1885                         thinkpad_id.ec_version_str : "unknown");
1886
1887         if (thinkpad_id.vendor && thinkpad_id.model_str)
1888                 printk(TPACPI_INFO "%s %s, model %s\n",
1889                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1890                                 "IBM" : ((thinkpad_id.vendor ==
1891                                                 PCI_VENDOR_ID_LENOVO) ?
1892                                         "Lenovo" : "Unknown vendor"),
1893                         thinkpad_id.model_str,
1894                         (thinkpad_id.nummodel_str) ?
1895                                 thinkpad_id.nummodel_str : "unknown");
1896
1897         tpacpi_check_outdated_fw();
1898         return 0;
1899 }
1900
1901 static int thinkpad_acpi_driver_read(struct seq_file *m)
1902 {
1903         seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1904         seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1905         return 0;
1906 }
1907
1908 static struct ibm_struct thinkpad_acpi_driver_data = {
1909         .name = "driver",
1910         .read = thinkpad_acpi_driver_read,
1911 };
1912
1913 /*************************************************************************
1914  * Hotkey subdriver
1915  */
1916
1917 /*
1918  * ThinkPad firmware event model
1919  *
1920  * The ThinkPad firmware has two main event interfaces: normal ACPI
1921  * notifications (which follow the ACPI standard), and a private event
1922  * interface.
1923  *
1924  * The private event interface also issues events for the hotkeys.  As
1925  * the driver gained features, the event handling code ended up being
1926  * built around the hotkey subdriver.  This will need to be refactored
1927  * to a more formal event API eventually.
1928  *
1929  * Some "hotkeys" are actually supposed to be used as event reports,
1930  * such as "brightness has changed", "volume has changed", depending on
1931  * the ThinkPad model and how the firmware is operating.
1932  *
1933  * Unlike other classes, hotkey-class events have mask/unmask control on
1934  * non-ancient firmware.  However, how it behaves changes a lot with the
1935  * firmware model and version.
1936  */
1937
1938 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1939         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1940         TP_ACPI_HOTKEYSCAN_FNF2,
1941         TP_ACPI_HOTKEYSCAN_FNF3,
1942         TP_ACPI_HOTKEYSCAN_FNF4,
1943         TP_ACPI_HOTKEYSCAN_FNF5,
1944         TP_ACPI_HOTKEYSCAN_FNF6,
1945         TP_ACPI_HOTKEYSCAN_FNF7,
1946         TP_ACPI_HOTKEYSCAN_FNF8,
1947         TP_ACPI_HOTKEYSCAN_FNF9,
1948         TP_ACPI_HOTKEYSCAN_FNF10,
1949         TP_ACPI_HOTKEYSCAN_FNF11,
1950         TP_ACPI_HOTKEYSCAN_FNF12,
1951         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1952         TP_ACPI_HOTKEYSCAN_FNINSERT,
1953         TP_ACPI_HOTKEYSCAN_FNDELETE,
1954         TP_ACPI_HOTKEYSCAN_FNHOME,
1955         TP_ACPI_HOTKEYSCAN_FNEND,
1956         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1957         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1958         TP_ACPI_HOTKEYSCAN_FNSPACE,
1959         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1960         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1961         TP_ACPI_HOTKEYSCAN_MUTE,
1962         TP_ACPI_HOTKEYSCAN_THINKPAD,
1963 };
1964
1965 enum {  /* Keys/events available through NVRAM polling */
1966         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1967         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1968 };
1969
1970 enum {  /* Positions of some of the keys in hotkey masks */
1971         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1972         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1973         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1974         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1975         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1976         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1977         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1978         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1979         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1980         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1981         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1982 };
1983
1984 enum {  /* NVRAM to ACPI HKEY group map */
1985         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1986                                           TP_ACPI_HKEY_ZOOM_MASK |
1987                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1988                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1989         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1990                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1991         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1992                                           TP_ACPI_HKEY_VOLDWN_MASK |
1993                                           TP_ACPI_HKEY_MUTE_MASK,
1994 };
1995
1996 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1997 struct tp_nvram_state {
1998        u16 thinkpad_toggle:1;
1999        u16 zoom_toggle:1;
2000        u16 display_toggle:1;
2001        u16 thinklight_toggle:1;
2002        u16 hibernate_toggle:1;
2003        u16 displayexp_toggle:1;
2004        u16 display_state:1;
2005        u16 brightness_toggle:1;
2006        u16 volume_toggle:1;
2007        u16 mute:1;
2008
2009        u8 brightness_level;
2010        u8 volume_level;
2011 };
2012
2013 /* kthread for the hotkey poller */
2014 static struct task_struct *tpacpi_hotkey_task;
2015
2016 /* Acquired while the poller kthread is running, use to sync start/stop */
2017 static struct mutex hotkey_thread_mutex;
2018
2019 /*
2020  * Acquire mutex to write poller control variables as an
2021  * atomic block.
2022  *
2023  * Increment hotkey_config_change when changing them if you
2024  * want the kthread to forget old state.
2025  *
2026  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2027  */
2028 static struct mutex hotkey_thread_data_mutex;
2029 static unsigned int hotkey_config_change;
2030
2031 /*
2032  * hotkey poller control variables
2033  *
2034  * Must be atomic or readers will also need to acquire mutex
2035  *
2036  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
2037  * should be used only when the changes need to be taken as
2038  * a block, OR when one needs to force the kthread to forget
2039  * old state.
2040  */
2041 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
2042 static unsigned int hotkey_poll_freq = 10; /* Hz */
2043
2044 #define HOTKEY_CONFIG_CRITICAL_START \
2045         do { \
2046                 mutex_lock(&hotkey_thread_data_mutex); \
2047                 hotkey_config_change++; \
2048         } while (0);
2049 #define HOTKEY_CONFIG_CRITICAL_END \
2050         mutex_unlock(&hotkey_thread_data_mutex);
2051
2052 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2053
2054 #define hotkey_source_mask 0U
2055 #define HOTKEY_CONFIG_CRITICAL_START
2056 #define HOTKEY_CONFIG_CRITICAL_END
2057
2058 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2059
2060 static struct mutex hotkey_mutex;
2061
2062 static enum {   /* Reasons for waking up */
2063         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
2064         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
2065         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
2066 } hotkey_wakeup_reason;
2067
2068 static int hotkey_autosleep_ack;
2069
2070 static u32 hotkey_orig_mask;            /* events the BIOS had enabled */
2071 static u32 hotkey_all_mask;             /* all events supported in fw */
2072 static u32 hotkey_reserved_mask;        /* events better left disabled */
2073 static u32 hotkey_driver_mask;          /* events needed by the driver */
2074 static u32 hotkey_user_mask;            /* events visible to userspace */
2075 static u32 hotkey_acpi_mask;            /* events enabled in firmware */
2076
2077 static unsigned int hotkey_report_mode;
2078
2079 static u16 *hotkey_keycode_map;
2080
2081 static struct attribute_set *hotkey_dev_attributes;
2082
2083 static void tpacpi_driver_event(const unsigned int hkey_event);
2084 static void hotkey_driver_event(const unsigned int scancode);
2085
2086 /* HKEY.MHKG() return bits */
2087 #define TP_HOTKEY_TABLET_MASK (1 << 3)
2088
2089 static int hotkey_get_wlsw(void)
2090 {
2091         int status;
2092
2093         if (!tp_features.hotkey_wlsw)
2094                 return -ENODEV;
2095
2096 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2097         if (dbg_wlswemul)
2098                 return (tpacpi_wlsw_emulstate) ?
2099                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2100 #endif
2101
2102         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2103                 return -EIO;
2104
2105         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2106 }
2107
2108 static int hotkey_get_tablet_mode(int *status)
2109 {
2110         int s;
2111
2112         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2113                 return -EIO;
2114
2115         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2116         return 0;
2117 }
2118
2119 /*
2120  * Reads current event mask from firmware, and updates
2121  * hotkey_acpi_mask accordingly.  Also resets any bits
2122  * from hotkey_user_mask that are unavailable to be
2123  * delivered (shadow requirement of the userspace ABI).
2124  *
2125  * Call with hotkey_mutex held
2126  */
2127 static int hotkey_mask_get(void)
2128 {
2129         if (tp_features.hotkey_mask) {
2130                 u32 m = 0;
2131
2132                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2133                         return -EIO;
2134
2135                 hotkey_acpi_mask = m;
2136         } else {
2137                 /* no mask support doesn't mean no event support... */
2138                 hotkey_acpi_mask = hotkey_all_mask;
2139         }
2140
2141         /* sync userspace-visible mask */
2142         hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2143
2144         return 0;
2145 }
2146
2147 void static hotkey_mask_warn_incomplete_mask(void)
2148 {
2149         /* log only what the user can fix... */
2150         const u32 wantedmask = hotkey_driver_mask &
2151                 ~(hotkey_acpi_mask | hotkey_source_mask) &
2152                 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2153
2154         if (wantedmask)
2155                 printk(TPACPI_NOTICE
2156                         "required events 0x%08x not enabled!\n",
2157                         wantedmask);
2158 }
2159
2160 /*
2161  * Set the firmware mask when supported
2162  *
2163  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2164  *
2165  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2166  *
2167  * Call with hotkey_mutex held
2168  */
2169 static int hotkey_mask_set(u32 mask)
2170 {
2171         int i;
2172         int rc = 0;
2173
2174         const u32 fwmask = mask & ~hotkey_source_mask;
2175
2176         if (tp_features.hotkey_mask) {
2177                 for (i = 0; i < 32; i++) {
2178                         if (!acpi_evalf(hkey_handle,
2179                                         NULL, "MHKM", "vdd", i + 1,
2180                                         !!(mask & (1 << i)))) {
2181                                 rc = -EIO;
2182                                 break;
2183                         }
2184                 }
2185         }
2186
2187         /*
2188          * We *must* make an inconditional call to hotkey_mask_get to
2189          * refresh hotkey_acpi_mask and update hotkey_user_mask
2190          *
2191          * Take the opportunity to also log when we cannot _enable_
2192          * a given event.
2193          */
2194         if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2195                 printk(TPACPI_NOTICE
2196                        "asked for hotkey mask 0x%08x, but "
2197                        "firmware forced it to 0x%08x\n",
2198                        fwmask, hotkey_acpi_mask);
2199         }
2200
2201         if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2202                 hotkey_mask_warn_incomplete_mask();
2203
2204         return rc;
2205 }
2206
2207 /*
2208  * Sets hotkey_user_mask and tries to set the firmware mask
2209  *
2210  * Call with hotkey_mutex held
2211  */
2212 static int hotkey_user_mask_set(const u32 mask)
2213 {
2214         int rc;
2215
2216         /* Give people a chance to notice they are doing something that
2217          * is bound to go boom on their users sooner or later */
2218         if (!tp_warned.hotkey_mask_ff &&
2219             (mask == 0xffff || mask == 0xffffff ||
2220              mask == 0xffffffff)) {
2221                 tp_warned.hotkey_mask_ff = 1;
2222                 printk(TPACPI_NOTICE
2223                        "setting the hotkey mask to 0x%08x is likely "
2224                        "not the best way to go about it\n", mask);
2225                 printk(TPACPI_NOTICE
2226                        "please consider using the driver defaults, "
2227                        "and refer to up-to-date thinkpad-acpi "
2228                        "documentation\n");
2229         }
2230
2231         /* Try to enable what the user asked for, plus whatever we need.
2232          * this syncs everything but won't enable bits in hotkey_user_mask */
2233         rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2234
2235         /* Enable the available bits in hotkey_user_mask */
2236         hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2237
2238         return rc;
2239 }
2240
2241 /*
2242  * Sets the driver hotkey mask.
2243  *
2244  * Can be called even if the hotkey subdriver is inactive
2245  */
2246 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2247 {
2248         int rc;
2249
2250         /* Do the right thing if hotkey_init has not been called yet */
2251         if (!tp_features.hotkey) {
2252                 hotkey_driver_mask = mask;
2253                 return 0;
2254         }
2255
2256         mutex_lock(&hotkey_mutex);
2257
2258         HOTKEY_CONFIG_CRITICAL_START
2259         hotkey_driver_mask = mask;
2260 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2261         hotkey_source_mask |= (mask & ~hotkey_all_mask);
2262 #endif
2263         HOTKEY_CONFIG_CRITICAL_END
2264
2265         rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2266                                                         ~hotkey_source_mask);
2267         mutex_unlock(&hotkey_mutex);
2268
2269         return rc;
2270 }
2271
2272 static int hotkey_status_get(int *status)
2273 {
2274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2275                 return -EIO;
2276
2277         return 0;
2278 }
2279
2280 static int hotkey_status_set(bool enable)
2281 {
2282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2283                 return -EIO;
2284
2285         return 0;
2286 }
2287
2288 static void tpacpi_input_send_tabletsw(void)
2289 {
2290         int state;
2291
2292         if (tp_features.hotkey_tablet &&
2293             !hotkey_get_tablet_mode(&state)) {
2294                 mutex_lock(&tpacpi_inputdev_send_mutex);
2295
2296                 input_report_switch(tpacpi_inputdev,
2297                                     SW_TABLET_MODE, !!state);
2298                 input_sync(tpacpi_inputdev);
2299
2300                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2301         }
2302 }
2303
2304 /* Do NOT call without validating scancode first */
2305 static void tpacpi_input_send_key(const unsigned int scancode)
2306 {
2307         const unsigned int keycode = hotkey_keycode_map[scancode];
2308
2309         if (keycode != KEY_RESERVED) {
2310                 mutex_lock(&tpacpi_inputdev_send_mutex);
2311
2312                 input_report_key(tpacpi_inputdev, keycode, 1);
2313                 if (keycode == KEY_UNKNOWN)
2314                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2315                                     scancode);
2316                 input_sync(tpacpi_inputdev);
2317
2318                 input_report_key(tpacpi_inputdev, keycode, 0);
2319                 if (keycode == KEY_UNKNOWN)
2320                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2321                                     scancode);
2322                 input_sync(tpacpi_inputdev);
2323
2324                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2325         }
2326 }
2327
2328 /* Do NOT call without validating scancode first */
2329 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2330 {
2331         hotkey_driver_event(scancode);
2332         if (hotkey_user_mask & (1 << scancode))
2333                 tpacpi_input_send_key(scancode);
2334 }
2335
2336 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2337 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2338
2339 /* Do NOT call without validating scancode first */
2340 static void tpacpi_hotkey_send_key(unsigned int scancode)
2341 {
2342         tpacpi_input_send_key_masked(scancode);
2343         if (hotkey_report_mode < 2) {
2344                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2345                                 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode);
2346         }
2347 }
2348
2349 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2350 {
2351         u8 d;
2352
2353         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2354                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2355                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2356                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2357                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2358                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2359         }
2360         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2361                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2362                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2363         }
2364         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2365                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2366                 n->displayexp_toggle =
2367                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2368         }
2369         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2370                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2371                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2372                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2373                 n->brightness_toggle =
2374                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2375         }
2376         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2377                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2378                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2379                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2380                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2381                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2382         }
2383 }
2384
2385 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2386                                            struct tp_nvram_state *newn,
2387                                            const u32 event_mask)
2388 {
2389
2390 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2391         do { \
2392                 if ((event_mask & (1 << __scancode)) && \
2393                     oldn->__member != newn->__member) \
2394                         tpacpi_hotkey_send_key(__scancode); \
2395         } while (0)
2396
2397 #define TPACPI_MAY_SEND_KEY(__scancode) \
2398         do { \
2399                 if (event_mask & (1 << __scancode)) \
2400                         tpacpi_hotkey_send_key(__scancode); \
2401         } while (0)
2402
2403         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2404         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2405         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2406         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2407
2408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2409
2410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2411
2412         /* handle volume */
2413         if (oldn->volume_toggle != newn->volume_toggle) {
2414                 if (oldn->mute != newn->mute) {
2415                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2416                 }
2417                 if (oldn->volume_level > newn->volume_level) {
2418                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2419                 } else if (oldn->volume_level < newn->volume_level) {
2420                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2421                 } else if (oldn->mute == newn->mute) {
2422                         /* repeated key presses that didn't change state */
2423                         if (newn->mute) {
2424                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2425                         } else if (newn->volume_level != 0) {
2426                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2427                         } else {
2428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2429                         }
2430                 }
2431         }
2432
2433         /* handle brightness */
2434         if (oldn->brightness_toggle != newn->brightness_toggle) {
2435                 if (oldn->brightness_level < newn->brightness_level) {
2436                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2437                 } else if (oldn->brightness_level > newn->brightness_level) {
2438                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2439                 } else {
2440                         /* repeated key presses that didn't change state */
2441                         if (newn->brightness_level != 0) {
2442                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2443                         } else {
2444                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2445                         }
2446                 }
2447         }
2448
2449 #undef TPACPI_COMPARE_KEY
2450 #undef TPACPI_MAY_SEND_KEY
2451 }
2452
2453 /*
2454  * Polling driver
2455  *
2456  * We track all events in hotkey_source_mask all the time, since
2457  * most of them are edge-based.  We only issue those requested by
2458  * hotkey_user_mask or hotkey_driver_mask, though.
2459  */
2460 static int hotkey_kthread(void *data)
2461 {
2462         struct tp_nvram_state s[2];
2463         u32 poll_mask, event_mask;
2464         unsigned int si, so;
2465         unsigned long t;
2466         unsigned int change_detector, must_reset;
2467         unsigned int poll_freq;
2468
2469         mutex_lock(&hotkey_thread_mutex);
2470
2471         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2472                 goto exit;
2473
2474         set_freezable();
2475
2476         so = 0;
2477         si = 1;
2478         t = 0;
2479
2480         /* Initial state for compares */
2481         mutex_lock(&hotkey_thread_data_mutex);
2482         change_detector = hotkey_config_change;
2483         poll_mask = hotkey_source_mask;
2484         event_mask = hotkey_source_mask &
2485                         (hotkey_driver_mask | hotkey_user_mask);
2486         poll_freq = hotkey_poll_freq;
2487         mutex_unlock(&hotkey_thread_data_mutex);
2488         hotkey_read_nvram(&s[so], poll_mask);
2489
2490         while (!kthread_should_stop()) {
2491                 if (t == 0) {
2492                         if (likely(poll_freq))
2493                                 t = 1000/poll_freq;
2494                         else
2495                                 t = 100;        /* should never happen... */
2496                 }
2497                 t = msleep_interruptible(t);
2498                 if (unlikely(kthread_should_stop()))
2499                         break;
2500                 must_reset = try_to_freeze();
2501                 if (t > 0 && !must_reset)
2502                         continue;
2503
2504                 mutex_lock(&hotkey_thread_data_mutex);
2505                 if (must_reset || hotkey_config_change != change_detector) {
2506                         /* forget old state on thaw or config change */
2507                         si = so;
2508                         t = 0;
2509                         change_detector = hotkey_config_change;
2510                 }
2511                 poll_mask = hotkey_source_mask;
2512                 event_mask = hotkey_source_mask &
2513                                 (hotkey_driver_mask | hotkey_user_mask);
2514                 poll_freq = hotkey_poll_freq;
2515                 mutex_unlock(&hotkey_thread_data_mutex);
2516
2517                 if (likely(poll_mask)) {
2518                         hotkey_read_nvram(&s[si], poll_mask);
2519                         if (likely(si != so)) {
2520                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2521                                                                 event_mask);
2522                         }
2523                 }
2524
2525                 so = si;
2526                 si ^= 1;
2527         }
2528
2529 exit:
2530         mutex_unlock(&hotkey_thread_mutex);
2531         return 0;
2532 }
2533
2534 /* call with hotkey_mutex held */
2535 static void hotkey_poll_stop_sync(void)
2536 {
2537         if (tpacpi_hotkey_task) {
2538                 if (frozen(tpacpi_hotkey_task) ||
2539                     freezing(tpacpi_hotkey_task))
2540                         thaw_process(tpacpi_hotkey_task);
2541
2542                 kthread_stop(tpacpi_hotkey_task);
2543                 tpacpi_hotkey_task = NULL;
2544                 mutex_lock(&hotkey_thread_mutex);
2545                 /* at this point, the thread did exit */
2546                 mutex_unlock(&hotkey_thread_mutex);
2547         }
2548 }
2549
2550 /* call with hotkey_mutex held */
2551 static void hotkey_poll_setup(bool may_warn)
2552 {
2553         const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2554         const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2555
2556         if (hotkey_poll_freq > 0 &&
2557             (poll_driver_mask ||
2558              (poll_user_mask && tpacpi_inputdev->users > 0))) {
2559                 if (!tpacpi_hotkey_task) {
2560                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2561                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2562                         if (IS_ERR(tpacpi_hotkey_task)) {
2563                                 tpacpi_hotkey_task = NULL;
2564                                 printk(TPACPI_ERR
2565                                        "could not create kernel thread "
2566                                        "for hotkey polling\n");
2567                         }
2568                 }
2569         } else {
2570                 hotkey_poll_stop_sync();
2571                 if (may_warn && (poll_driver_mask || poll_user_mask) &&
2572                     hotkey_poll_freq == 0) {
2573                         printk(TPACPI_NOTICE
2574                                 "hot keys 0x%08x and/or events 0x%08x "
2575                                 "require polling, which is currently "
2576                                 "disabled\n",
2577                                 poll_user_mask, poll_driver_mask);
2578                 }
2579         }
2580 }
2581
2582 static void hotkey_poll_setup_safe(bool may_warn)
2583 {
2584         mutex_lock(&hotkey_mutex);
2585         hotkey_poll_setup(may_warn);
2586         mutex_unlock(&hotkey_mutex);
2587 }
2588
2589 /* call with hotkey_mutex held */
2590 static void hotkey_poll_set_freq(unsigned int freq)
2591 {
2592         if (!freq)
2593                 hotkey_poll_stop_sync();
2594
2595         hotkey_poll_freq = freq;
2596 }
2597
2598 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2599
2600 static void hotkey_poll_setup_safe(bool __unused)
2601 {
2602 }
2603
2604 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2605
2606 static int hotkey_inputdev_open(struct input_dev *dev)
2607 {
2608         switch (tpacpi_lifecycle) {
2609         case TPACPI_LIFE_INIT:
2610                 /*
2611                  * hotkey_init will call hotkey_poll_setup_safe
2612                  * at the appropriate moment
2613                  */
2614                 return 0;
2615         case TPACPI_LIFE_EXITING:
2616                 return -EBUSY;
2617         case TPACPI_LIFE_RUNNING:
2618                 hotkey_poll_setup_safe(false);
2619                 return 0;
2620         }
2621
2622         /* Should only happen if tpacpi_lifecycle is corrupt */
2623         BUG();
2624         return -EBUSY;
2625 }
2626
2627 static void hotkey_inputdev_close(struct input_dev *dev)
2628 {
2629         /* disable hotkey polling when possible */
2630         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
2631             !(hotkey_source_mask & hotkey_driver_mask))
2632                 hotkey_poll_setup_safe(false);
2633 }
2634
2635 /* sysfs hotkey enable ------------------------------------------------- */
2636 static ssize_t hotkey_enable_show(struct device *dev,
2637                            struct device_attribute *attr,
2638                            char *buf)
2639 {
2640         int res, status;
2641
2642         printk_deprecated_attribute("hotkey_enable",
2643                         "Hotkey reporting is always enabled");
2644
2645         res = hotkey_status_get(&status);
2646         if (res)
2647                 return res;
2648
2649         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2650 }
2651
2652 static ssize_t hotkey_enable_store(struct device *dev,
2653                             struct device_attribute *attr,
2654                             const char *buf, size_t count)
2655 {
2656         unsigned long t;
2657
2658         printk_deprecated_attribute("hotkey_enable",
2659                         "Hotkeys can be disabled through hotkey_mask");
2660
2661         if (parse_strtoul(buf, 1, &t))
2662                 return -EINVAL;
2663
2664         if (t == 0)
2665                 return -EPERM;
2666
2667         return count;
2668 }
2669
2670 static struct device_attribute dev_attr_hotkey_enable =
2671         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2672                 hotkey_enable_show, hotkey_enable_store);
2673
2674 /* sysfs hotkey mask --------------------------------------------------- */
2675 static ssize_t hotkey_mask_show(struct device *dev,
2676                            struct device_attribute *attr,
2677                            char *buf)
2678 {
2679         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask);
2680 }
2681
2682 static ssize_t hotkey_mask_store(struct device *dev,
2683                             struct device_attribute *attr,
2684                             const char *buf, size_t count)
2685 {
2686         unsigned long t;
2687         int res;
2688
2689         if (parse_strtoul(buf, 0xffffffffUL, &t))
2690                 return -EINVAL;
2691
2692         if (mutex_lock_killable(&hotkey_mutex))
2693                 return -ERESTARTSYS;
2694
2695         res = hotkey_user_mask_set(t);
2696
2697 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2698         hotkey_poll_setup(true);
2699 #endif
2700
2701         mutex_unlock(&hotkey_mutex);
2702
2703         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2704
2705         return (res) ? res : count;
2706 }
2707
2708 static struct device_attribute dev_attr_hotkey_mask =
2709         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2710                 hotkey_mask_show, hotkey_mask_store);
2711
2712 /* sysfs hotkey bios_enabled ------------------------------------------- */
2713 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2714                            struct device_attribute *attr,
2715                            char *buf)
2716 {
2717         return sprintf(buf, "0\n");
2718 }
2719
2720 static struct device_attribute dev_attr_hotkey_bios_enabled =
2721         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2722
2723 /* sysfs hotkey bios_mask ---------------------------------------------- */
2724 static ssize_t hotkey_bios_mask_show(struct device *dev,
2725                            struct device_attribute *attr,
2726                            char *buf)
2727 {
2728         printk_deprecated_attribute("hotkey_bios_mask",
2729                         "This attribute is useless.");
2730         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2731 }
2732
2733 static struct device_attribute dev_attr_hotkey_bios_mask =
2734         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2735
2736 /* sysfs hotkey all_mask ----------------------------------------------- */
2737 static ssize_t hotkey_all_mask_show(struct device *dev,
2738                            struct device_attribute *attr,
2739                            char *buf)
2740 {
2741         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2742                                 hotkey_all_mask | hotkey_source_mask);
2743 }
2744
2745 static struct device_attribute dev_attr_hotkey_all_mask =
2746         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2747
2748 /* sysfs hotkey recommended_mask --------------------------------------- */
2749 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2750                                             struct device_attribute *attr,
2751                                             char *buf)
2752 {
2753         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2754                         (hotkey_all_mask | hotkey_source_mask)
2755                         & ~hotkey_reserved_mask);
2756 }
2757
2758 static struct device_attribute dev_attr_hotkey_recommended_mask =
2759         __ATTR(hotkey_recommended_mask, S_IRUGO,
2760                 hotkey_recommended_mask_show, NULL);
2761
2762 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2763
2764 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2765 static ssize_t hotkey_source_mask_show(struct device *dev,
2766                            struct device_attribute *attr,
2767                            char *buf)
2768 {
2769         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2770 }
2771
2772 static ssize_t hotkey_source_mask_store(struct device *dev,
2773                             struct device_attribute *attr,
2774                             const char *buf, size_t count)
2775 {
2776         unsigned long t;
2777         u32 r_ev;
2778         int rc;
2779
2780         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2781                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2782                 return -EINVAL;
2783
2784         if (mutex_lock_killable(&hotkey_mutex))
2785                 return -ERESTARTSYS;
2786
2787         HOTKEY_CONFIG_CRITICAL_START
2788         hotkey_source_mask = t;
2789         HOTKEY_CONFIG_CRITICAL_END
2790
2791         rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2792                         ~hotkey_source_mask);
2793         hotkey_poll_setup(true);
2794
2795         /* check if events needed by the driver got disabled */
2796         r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2797                 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2798
2799         mutex_unlock(&hotkey_mutex);
2800
2801         if (rc < 0)
2802                 printk(TPACPI_ERR "hotkey_source_mask: failed to update the"
2803                         "firmware event mask!\n");
2804
2805         if (r_ev)
2806                 printk(TPACPI_NOTICE "hotkey_source_mask: "
2807                         "some important events were disabled: "
2808                         "0x%04x\n", r_ev);
2809
2810         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2811
2812         return (rc < 0) ? rc : count;
2813 }
2814
2815 static struct device_attribute dev_attr_hotkey_source_mask =
2816         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2817                 hotkey_source_mask_show, hotkey_source_mask_store);
2818
2819 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2820 static ssize_t hotkey_poll_freq_show(struct device *dev,
2821                            struct device_attribute *attr,
2822                            char *buf)
2823 {
2824         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2825 }
2826
2827 static ssize_t hotkey_poll_freq_store(struct device *dev,
2828                             struct device_attribute *attr,
2829                             const char *buf, size_t count)
2830 {
2831         unsigned long t;
2832
2833         if (parse_strtoul(buf, 25, &t))
2834                 return -EINVAL;
2835
2836         if (mutex_lock_killable(&hotkey_mutex))
2837                 return -ERESTARTSYS;
2838
2839         hotkey_poll_set_freq(t);
2840         hotkey_poll_setup(true);
2841
2842         mutex_unlock(&hotkey_mutex);
2843
2844         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2845
2846         return count;
2847 }
2848
2849 static struct device_attribute dev_attr_hotkey_poll_freq =
2850         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2851                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2852
2853 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2854
2855 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2856 static ssize_t hotkey_radio_sw_show(struct device *dev,
2857                            struct device_attribute *attr,
2858                            char *buf)
2859 {
2860         int res;
2861         res = hotkey_get_wlsw();
2862         if (res < 0)
2863                 return res;
2864
2865         /* Opportunistic update */
2866         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2867
2868         return snprintf(buf, PAGE_SIZE, "%d\n",
2869                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2870 }
2871
2872 static struct device_attribute dev_attr_hotkey_radio_sw =
2873         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2874
2875 static void hotkey_radio_sw_notify_change(void)
2876 {
2877         if (tp_features.hotkey_wlsw)
2878                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2879                              "hotkey_radio_sw");
2880 }
2881
2882 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2883 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2884                            struct device_attribute *attr,
2885                            char *buf)
2886 {
2887         int res, s;
2888         res = hotkey_get_tablet_mode(&s);
2889         if (res < 0)
2890                 return res;
2891
2892         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2893 }
2894
2895 static struct device_attribute dev_attr_hotkey_tablet_mode =
2896         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2897
2898 static void hotkey_tablet_mode_notify_change(void)
2899 {
2900         if (tp_features.hotkey_tablet)
2901                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2902                              "hotkey_tablet_mode");
2903 }
2904
2905 /* sysfs hotkey report_mode -------------------------------------------- */
2906 static ssize_t hotkey_report_mode_show(struct device *dev,
2907                            struct device_attribute *attr,
2908                            char *buf)
2909 {
2910         return snprintf(buf, PAGE_SIZE, "%d\n",
2911                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2912 }
2913
2914 static struct device_attribute dev_attr_hotkey_report_mode =
2915         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2916
2917 /* sysfs wakeup reason (pollable) -------------------------------------- */
2918 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2919                            struct device_attribute *attr,
2920                            char *buf)
2921 {
2922         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2923 }
2924
2925 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2926         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2927
2928 static void hotkey_wakeup_reason_notify_change(void)
2929 {
2930         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2931                      "wakeup_reason");
2932 }
2933
2934 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2935 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2936                            struct device_attribute *attr,
2937                            char *buf)
2938 {
2939         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2940 }
2941
2942 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2943         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2944                hotkey_wakeup_hotunplug_complete_show, NULL);
2945
2946 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2947 {
2948         sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2949                      "wakeup_hotunplug_complete");
2950 }
2951
2952 /* --------------------------------------------------------------------- */
2953
2954 static struct attribute *hotkey_attributes[] __initdata = {
2955         &dev_attr_hotkey_enable.attr,
2956         &dev_attr_hotkey_bios_enabled.attr,
2957         &dev_attr_hotkey_bios_mask.attr,
2958         &dev_attr_hotkey_report_mode.attr,
2959         &dev_attr_hotkey_wakeup_reason.attr,
2960         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2961         &dev_attr_hotkey_mask.attr,
2962         &dev_attr_hotkey_all_mask.attr,
2963         &dev_attr_hotkey_recommended_mask.attr,
2964 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2965         &dev_attr_hotkey_source_mask.attr,
2966         &dev_attr_hotkey_poll_freq.attr,
2967 #endif
2968 };
2969
2970 /*
2971  * Sync both the hw and sw blocking state of all switches
2972  */
2973 static void tpacpi_send_radiosw_update(void)
2974 {
2975         int wlsw;
2976
2977         /*
2978          * We must sync all rfkill controllers *before* issuing any
2979          * rfkill input events, or we will race the rfkill core input
2980          * handler.
2981          *
2982          * tpacpi_inputdev_send_mutex works as a syncronization point
2983          * for the above.
2984          *
2985          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2986          */
2987
2988         wlsw = hotkey_get_wlsw();
2989
2990         /* Sync hw blocking state first if it is hw-blocked */
2991         if (wlsw == TPACPI_RFK_RADIO_OFF)
2992                 tpacpi_rfk_update_hwblock_state(true);
2993
2994         /* Sync sw blocking state */
2995         tpacpi_rfk_update_swstate_all();
2996
2997         /* Sync hw blocking state last if it is hw-unblocked */
2998         if (wlsw == TPACPI_RFK_RADIO_ON)
2999                 tpacpi_rfk_update_hwblock_state(false);
3000
3001         /* Issue rfkill input event for WLSW switch */
3002         if (!(wlsw < 0)) {
3003                 mutex_lock(&tpacpi_inputdev_send_mutex);
3004
3005                 input_report_switch(tpacpi_inputdev,
3006                                     SW_RFKILL_ALL, (wlsw > 0));
3007                 input_sync(tpacpi_inputdev);
3008
3009                 mutex_unlock(&tpacpi_inputdev_send_mutex);
3010         }
3011
3012         /*
3013          * this can be unconditional, as we will poll state again
3014          * if userspace uses the notify to read data
3015          */
3016         hotkey_radio_sw_notify_change();
3017 }
3018
3019 static void hotkey_exit(void)
3020 {
3021 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3022         mutex_lock(&hotkey_mutex);
3023         hotkey_poll_stop_sync();
3024         mutex_unlock(&hotkey_mutex);
3025 #endif
3026
3027         if (hotkey_dev_attributes)
3028                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3029
3030         kfree(hotkey_keycode_map);
3031
3032         dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3033                    "restoring original HKEY status and mask\n");
3034         /* yes, there is a bitwise or below, we want the
3035          * functions to be called even if one of them fail */
3036         if (((tp_features.hotkey_mask &&
3037               hotkey_mask_set(hotkey_orig_mask)) |
3038              hotkey_status_set(false)) != 0)
3039                 printk(TPACPI_ERR
3040                        "failed to restore hot key mask "
3041                        "to BIOS defaults\n");
3042 }
3043
3044 static void __init hotkey_unmap(const unsigned int scancode)
3045 {
3046         if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3047                 clear_bit(hotkey_keycode_map[scancode],
3048                           tpacpi_inputdev->keybit);
3049                 hotkey_keycode_map[scancode] = KEY_RESERVED;
3050         }
3051 }
3052
3053 /*
3054  * HKEY quirks:
3055  *   TPACPI_HK_Q_INIMASK:       Supports FN+F3,FN+F4,FN+F12
3056  */
3057
3058 #define TPACPI_HK_Q_INIMASK     0x0001
3059
3060 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3061         TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3062         TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3063         TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3064         TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3065         TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3066         TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3067         TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3068         TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3069         TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3070         TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3071         TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3072         TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3073         TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3074         TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3075         TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3076         TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3077         TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3078         TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3079         TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3080 };
3081
3082 static int __init hotkey_init(struct ibm_init_struct *iibm)
3083 {
3084         /* Requirements for changing the default keymaps:
3085          *
3086          * 1. Many of the keys are mapped to KEY_RESERVED for very
3087          *    good reasons.  Do not change them unless you have deep
3088          *    knowledge on the IBM and Lenovo ThinkPad firmware for
3089          *    the various ThinkPad models.  The driver behaves
3090          *    differently for KEY_RESERVED: such keys have their
3091          *    hot key mask *unset* in mask_recommended, and also
3092          *    in the initial hot key mask programmed into the
3093          *    firmware at driver load time, which means the firm-
3094          *    ware may react very differently if you change them to
3095          *    something else;
3096          *
3097          * 2. You must be subscribed to the linux-thinkpad and
3098          *    ibm-acpi-devel mailing lists, and you should read the
3099          *    list archives since 2007 if you want to change the
3100          *    keymaps.  This requirement exists so that you will
3101          *    know the past history of problems with the thinkpad-
3102          *    acpi driver keymaps, and also that you will be
3103          *    listening to any bug reports;
3104          *
3105          * 3. Do not send thinkpad-acpi specific patches directly to
3106          *    for merging, *ever*.  Send them to the linux-acpi
3107          *    mailinglist for comments.  Merging is to be done only
3108          *    through acpi-test and the ACPI maintainer.
3109          *
3110          * If the above is too much to ask, don't change the keymap.
3111          * Ask the thinkpad-acpi maintainer to do it, instead.
3112          */
3113         static u16 ibm_keycode_map[] __initdata = {
3114                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3115                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
3116                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3117                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3118
3119                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3120                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3121                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3122                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3123
3124                 /* brightness: firmware always reacts to them */
3125                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
3126                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
3127
3128                 /* Thinklight: firmware always react to it */
3129                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3130
3131                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3132                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3133
3134                 /* Volume: firmware always react to it and reprograms
3135                  * the built-in *extra* mixer.  Never map it to control
3136                  * another mixer by default. */
3137                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3138                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3139                 KEY_RESERVED,   /* 0x16: MUTE */
3140
3141                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3142
3143                 /* (assignments unknown, please report if found) */
3144                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3145                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3146         };
3147         static u16 lenovo_keycode_map[] __initdata = {
3148                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3149                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
3150                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3151                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
3152
3153                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3154                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
3155                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
3156                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
3157
3158                 /* These should be enabled --only-- when ACPI video
3159                  * is disabled (i.e. in "vendor" mode), and are handled
3160                  * in a special way by the init code */
3161                 KEY_BRIGHTNESSUP,       /* 0x0F: FN+HOME (brightness up) */
3162                 KEY_BRIGHTNESSDOWN,     /* 0x10: FN+END (brightness down) */
3163
3164                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
3165
3166                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
3167                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
3168
3169                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
3170                  * react to it and reprograms the built-in *extra* mixer.
3171                  * Never map it to control another mixer by default.
3172                  *
3173                  * T60?, T61, R60?, R61: firmware and EC tries to send
3174                  * these over the regular keyboard, so these are no-ops,
3175                  * but there are still weird bugs re. MUTE, so do not
3176                  * change unless you get test reports from all Lenovo
3177                  * models.  May cause the BIOS to interfere with the
3178                  * HDA mixer.
3179                  */
3180                 KEY_RESERVED,   /* 0x14: VOLUME UP */
3181                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
3182                 KEY_RESERVED,   /* 0x16: MUTE */
3183
3184                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
3185
3186                 /* (assignments unknown, please report if found) */
3187                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3188                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3189         };
3190
3191 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
3192 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
3193 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
3194
3195         int res, i;
3196         int status;
3197         int hkeyv;
3198         bool radiosw_state  = false;
3199         bool tabletsw_state = false;
3200
3201         unsigned long quirks;
3202
3203         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3204                         "initializing hotkey subdriver\n");
3205
3206         BUG_ON(!tpacpi_inputdev);
3207         BUG_ON(tpacpi_inputdev->open != NULL ||
3208                tpacpi_inputdev->close != NULL);
3209
3210         TPACPI_ACPIHANDLE_INIT(hkey);
3211         mutex_init(&hotkey_mutex);
3212
3213 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3214         mutex_init(&hotkey_thread_mutex);
3215         mutex_init(&hotkey_thread_data_mutex);
3216 #endif
3217
3218         /* hotkey not supported on 570 */
3219         tp_features.hotkey = hkey_handle != NULL;
3220
3221         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3222                 "hotkeys are %s\n",
3223                 str_supported(tp_features.hotkey));
3224
3225         if (!tp_features.hotkey)
3226                 return 1;
3227
3228         quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3229                                      ARRAY_SIZE(tpacpi_hotkey_qtable));
3230
3231         tpacpi_disable_brightness_delay();
3232
3233         /* MUST have enough space for all attributes to be added to
3234          * hotkey_dev_attributes */
3235         hotkey_dev_attributes = create_attr_set(
3236                                         ARRAY_SIZE(hotkey_attributes) + 2,
3237                                         NULL);
3238         if (!hotkey_dev_attributes)
3239                 return -ENOMEM;
3240         res = add_many_to_attr_set(hotkey_dev_attributes,
3241                         hotkey_attributes,
3242                         ARRAY_SIZE(hotkey_attributes));
3243         if (res)
3244                 goto err_exit;
3245
3246         /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3247            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3248            for HKEY interface version 0x100 */
3249         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3250                 if ((hkeyv >> 8) != 1) {
3251                         printk(TPACPI_ERR "unknown version of the "
3252                                "HKEY interface: 0x%x\n", hkeyv);
3253                         printk(TPACPI_ERR "please report this to %s\n",
3254                                TPACPI_MAIL);
3255                 } else {
3256                         /*
3257                          * MHKV 0x100 in A31, R40, R40e,
3258                          * T4x, X31, and later
3259                          */
3260                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3261                                 "firmware HKEY interface version: 0x%x\n",
3262                                 hkeyv);
3263
3264                         /* Paranoia check AND init hotkey_all_mask */
3265                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3266                                         "MHKA", "qd")) {
3267                                 printk(TPACPI_ERR
3268                                        "missing MHKA handler, "
3269                                        "please report this to %s\n",
3270                                        TPACPI_MAIL);
3271                                 /* Fallback: pre-init for FN+F3,F4,F12 */
3272                                 hotkey_all_mask = 0x080cU;
3273                         } else {
3274                                 tp_features.hotkey_mask = 1;
3275                         }
3276                 }
3277         }
3278
3279         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3280                 "hotkey masks are %s\n",
3281                 str_supported(tp_features.hotkey_mask));
3282
3283         /* Init hotkey_all_mask if not initialized yet */
3284         if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3285             (quirks & TPACPI_HK_Q_INIMASK))
3286                 hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3287
3288         /* Init hotkey_acpi_mask and hotkey_orig_mask */
3289         if (tp_features.hotkey_mask) {
3290                 /* hotkey_source_mask *must* be zero for
3291                  * the first hotkey_mask_get to return hotkey_orig_mask */
3292                 res = hotkey_mask_get();
3293                 if (res)
3294                         goto err_exit;
3295
3296                 hotkey_orig_mask = hotkey_acpi_mask;
3297         } else {
3298                 hotkey_orig_mask = hotkey_all_mask;
3299                 hotkey_acpi_mask = hotkey_all_mask;
3300         }
3301
3302 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3303         if (dbg_wlswemul) {
3304                 tp_features.hotkey_wlsw = 1;
3305                 radiosw_state = !!tpacpi_wlsw_emulstate;
3306                 printk(TPACPI_INFO
3307                         "radio switch emulation enabled\n");
3308         } else
3309 #endif
3310         /* Not all thinkpads have a hardware radio switch */
3311         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3312                 tp_features.hotkey_wlsw = 1;
3313                 radiosw_state = !!status;
3314                 printk(TPACPI_INFO
3315                         "radio switch found; radios are %s\n",
3316                         enabled(status, 0));
3317         }
3318         if (tp_features.hotkey_wlsw)
3319                 res = add_to_attr_set(hotkey_dev_attributes,
3320                                 &dev_attr_hotkey_radio_sw.attr);
3321
3322         /* For X41t, X60t, X61t Tablets... */
3323         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3324                 tp_features.hotkey_tablet = 1;
3325                 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK);
3326                 printk(TPACPI_INFO
3327                         "possible tablet mode switch found; "
3328                         "ThinkPad in %s mode\n",
3329                         (tabletsw_state) ? "tablet" : "laptop");
3330                 res = add_to_attr_set(hotkey_dev_attributes,
3331                                 &dev_attr_hotkey_tablet_mode.attr);
3332         }
3333
3334         if (!res)
3335                 res = register_attr_set_with_sysfs(
3336                                 hotkey_dev_attributes,
3337                                 &tpacpi_pdev->dev.kobj);
3338         if (res)
3339                 goto err_exit;
3340
3341         /* Set up key map */
3342
3343         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3344                                         GFP_KERNEL);
3345         if (!hotkey_keycode_map) {
3346                 printk(TPACPI_ERR
3347                         "failed to allocate memory for key map\n");
3348                 res = -ENOMEM;
3349                 goto err_exit;
3350         }
3351
3352         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3353                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3354                            "using Lenovo default hot key map\n");
3355                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3356                         TPACPI_HOTKEY_MAP_SIZE);
3357         } else {
3358                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3359                            "using IBM default hot key map\n");
3360                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3361                         TPACPI_HOTKEY_MAP_SIZE);
3362         }
3363
3364         input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3365         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3366         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3367         tpacpi_inputdev->keycode = hotkey_keycode_map;
3368         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3369                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3370                         input_set_capability(tpacpi_inputdev, EV_KEY,
3371                                                 hotkey_keycode_map[i]);
3372                 } else {
3373                         if (i < sizeof(hotkey_reserved_mask)*8)
3374                                 hotkey_reserved_mask |= 1 << i;
3375                 }
3376         }
3377
3378         if (tp_features.hotkey_wlsw) {
3379                 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3380                 input_report_switch(tpacpi_inputdev,
3381                                     SW_RFKILL_ALL, radiosw_state);
3382         }
3383         if (tp_features.hotkey_tablet) {
3384                 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3385                 input_report_switch(tpacpi_inputdev,
3386                                     SW_TABLET_MODE, tabletsw_state);
3387         }
3388
3389         /* Do not issue duplicate brightness change events to
3390          * userspace */
3391         if (!tp_features.bright_acpimode)
3392                 /* update bright_acpimode... */
3393                 tpacpi_check_std_acpi_brightness_support();
3394
3395         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3396                 printk(TPACPI_INFO
3397                        "This ThinkPad has standard ACPI backlight "
3398                        "brightness control, supported by the ACPI "
3399                        "video driver\n");
3400                 printk(TPACPI_NOTICE
3401                        "Disabling thinkpad-acpi brightness events "
3402                        "by default...\n");
3403
3404                 /* Disable brightness up/down on Lenovo thinkpads when
3405                  * ACPI is handling them, otherwise it is plain impossible
3406                  * for userspace to do something even remotely sane */
3407                 hotkey_reserved_mask |=
3408                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3409                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3410                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3411                 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3412         }
3413
3414 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3415         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3416                                 & ~hotkey_all_mask
3417                                 & ~hotkey_reserved_mask;
3418
3419         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3420                     "hotkey source mask 0x%08x, polling freq %u\n",
3421                     hotkey_source_mask, hotkey_poll_freq);
3422 #endif
3423
3424         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3425                         "enabling firmware HKEY event interface...\n");
3426         res = hotkey_status_set(true);
3427         if (res) {
3428                 hotkey_exit();
3429                 return res;
3430         }
3431         res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3432                                | hotkey_driver_mask)
3433                               & ~hotkey_source_mask);
3434         if (res < 0 && res != -ENXIO) {
3435                 hotkey_exit();
3436                 return res;
3437         }
3438         hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3439                                 & ~hotkey_reserved_mask;
3440         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3441                 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3442                 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3443
3444         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3445                         "legacy ibm/hotkey event reporting over procfs %s\n",
3446                         (hotkey_report_mode < 2) ?
3447                                 "enabled" : "disabled");
3448
3449         tpacpi_inputdev->open = &hotkey_inputdev_open;
3450         tpacpi_inputdev->close = &hotkey_inputdev_close;
3451
3452         hotkey_poll_setup_safe(true);
3453
3454         return 0;
3455
3456 err_exit:
3457         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3458         hotkey_dev_attributes = NULL;
3459
3460         return (res < 0)? res : 1;
3461 }
3462
3463 static bool hotkey_notify_hotkey(const u32 hkey,
3464                                  bool *send_acpi_ev,
3465                                  bool *ignore_acpi_ev)
3466 {
3467         /* 0x1000-0x1FFF: key presses */
3468         unsigned int scancode = hkey & 0xfff;
3469         *send_acpi_ev = true;
3470         *ignore_acpi_ev = false;
3471
3472         if (scancode > 0 && scancode < 0x21) {
3473                 scancode--;
3474                 if (!(hotkey_source_mask & (1 << scancode))) {
3475                         tpacpi_input_send_key_masked(scancode);
3476                         *send_acpi_ev = false;
3477                 } else {
3478                         *ignore_acpi_ev = true;
3479                 }
3480                 return true;
3481         }
3482         return false;
3483 }
3484
3485 static bool hotkey_notify_wakeup(const u32 hkey,
3486                                  bool *send_acpi_ev,
3487                                  bool *ignore_acpi_ev)
3488 {
3489         /* 0x2000-0x2FFF: Wakeup reason */
3490         *send_acpi_ev = true;
3491         *ignore_acpi_ev = false;
3492
3493         switch (hkey) {
3494         case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3495         case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3496                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3497                 *ignore_acpi_ev = true;
3498                 break;
3499
3500         case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3501         case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3502                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3503                 *ignore_acpi_ev = true;
3504                 break;
3505
3506         case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3507         case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3508                 printk(TPACPI_ALERT
3509                         "EMERGENCY WAKEUP: battery almost empty\n");
3510                 /* how to auto-heal: */
3511                 /* 2313: woke up from S3, go to S4/S5 */
3512                 /* 2413: woke up from S4, go to S5 */
3513                 break;
3514
3515         default:
3516                 return false;
3517         }
3518
3519         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3520                 printk(TPACPI_INFO
3521                        "woke up due to a hot-unplug "
3522                        "request...\n");
3523                 hotkey_wakeup_reason_notify_change();
3524         }
3525         return true;
3526 }
3527
3528 static bool hotkey_notify_usrevent(const u32 hkey,
3529                                  bool *send_acpi_ev,
3530                                  bool *ignore_acpi_ev)
3531 {
3532         /* 0x5000-0x5FFF: human interface helpers */
3533         *send_acpi_ev = true;
3534         *ignore_acpi_ev = false;
3535
3536         switch (hkey) {
3537         case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3538         case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3539                 return true;
3540
3541         case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3542         case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3543                 tpacpi_input_send_tabletsw();
3544                 hotkey_tablet_mode_notify_change();
3545                 *send_acpi_ev = false;
3546                 return true;
3547
3548         case TP_HKEY_EV_LID_CLOSE:      /* Lid closed */
3549         case TP_HKEY_EV_LID_OPEN:       /* Lid opened */
3550         case TP_HKEY_EV_BRGHT_CHANGED:  /* brightness changed */
3551                 /* do not propagate these events */
3552                 *ignore_acpi_ev = true;
3553                 return true;
3554
3555         default:
3556                 return false;
3557         }
3558 }
3559
3560 static void thermal_dump_all_sensors(void);
3561
3562 static bool hotkey_notify_thermal(const u32 hkey,
3563                                  bool *send_acpi_ev,
3564                                  bool *ignore_acpi_ev)
3565 {
3566         bool known = true;
3567
3568         /* 0x6000-0x6FFF: thermal alarms */
3569         *send_acpi_ev = true;
3570         *ignore_acpi_ev = false;
3571
3572         switch (hkey) {
3573         case TP_HKEY_EV_THM_TABLE_CHANGED:
3574                 printk(TPACPI_INFO
3575                         "EC reports that Thermal Table has changed\n");
3576                 /* recommended action: do nothing, we don't have
3577                  * Lenovo ATM information */
3578                 return true;
3579         case TP_HKEY_EV_ALARM_BAT_HOT:
3580                 printk(TPACPI_CRIT
3581                         "THERMAL ALARM: battery is too hot!\n");
3582                 /* recommended action: warn user through gui */
3583                 break;
3584         case TP_HKEY_EV_ALARM_BAT_XHOT:
3585                 printk(TPACPI_ALERT
3586                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3587                 /* recommended action: immediate sleep/hibernate */
3588                 break;
3589         case TP_HKEY_EV_ALARM_SENSOR_HOT:
3590                 printk(TPACPI_CRIT
3591                         "THERMAL ALARM: "
3592                         "a sensor reports something is too hot!\n");
3593                 /* recommended action: warn user through gui, that */
3594                 /* some internal component is too hot */
3595                 break;
3596         case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3597                 printk(TPACPI_ALERT
3598                         "THERMAL EMERGENCY: "
3599                         "a sensor reports something is extremely hot!\n");
3600                 /* recommended action: immediate sleep/hibernate */
3601                 break;
3602         default:
3603                 printk(TPACPI_ALERT
3604                          "THERMAL ALERT: unknown thermal alarm received\n");
3605                 known = false;
3606         }
3607
3608         thermal_dump_all_sensors();
3609
3610         return known;
3611 }
3612
3613 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3614 {
3615         u32 hkey;
3616         bool send_acpi_ev;
3617         bool ignore_acpi_ev;
3618         bool known_ev;
3619
3620         if (event != 0x80) {
3621                 printk(TPACPI_ERR
3622                        "unknown HKEY notification event %d\n", event);
3623                 /* forward it to userspace, maybe it knows how to handle it */
3624                 acpi_bus_generate_netlink_event(
3625                                         ibm->acpi->device->pnp.device_class,
3626                                         dev_name(&ibm->acpi->device->dev),
3627                                         event, 0);
3628                 return;
3629         }
3630
3631         while (1) {
3632                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3633                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3634                         return;
3635                 }
3636
3637                 if (hkey == 0) {
3638                         /* queue empty */
3639                         return;
3640                 }
3641
3642                 send_acpi_ev = true;
3643                 ignore_acpi_ev = false;
3644
3645                 switch (hkey >> 12) {
3646                 case 1:
3647                         /* 0x1000-0x1FFF: key presses */
3648                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3649                                                  &ignore_acpi_ev);
3650                         break;
3651                 case 2:
3652                         /* 0x2000-0x2FFF: Wakeup reason */
3653                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3654                                                  &ignore_acpi_ev);
3655                         break;
3656                 case 3:
3657                         /* 0x3000-0x3FFF: bay-related wakeups */
3658                         if (hkey == TP_HKEY_EV_BAYEJ_ACK) {
3659                                 hotkey_autosleep_ack = 1;
3660                                 printk(TPACPI_INFO
3661                                        "bay ejected\n");
3662                                 hotkey_wakeup_hotunplug_complete_notify_change();
3663                                 known_ev = true;
3664                         } else {
3665                                 known_ev = false;
3666                         }
3667                         break;
3668                 case 4:
3669                         /* 0x4000-0x4FFF: dock-related wakeups */
3670                         if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
3671                                 hotkey_autosleep_ack = 1;
3672                                 printk(TPACPI_INFO
3673                                        "undocked\n");
3674                                 hotkey_wakeup_hotunplug_complete_notify_change();
3675                                 known_ev = true;
3676                         } else {
3677                                 known_ev = false;
3678                         }
3679                         break;
3680                 case 5:
3681                         /* 0x5000-0x5FFF: human interface helpers */
3682                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3683                                                  &ignore_acpi_ev);
3684                         break;
3685                 case 6:
3686                         /* 0x6000-0x6FFF: thermal alarms */
3687                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3688                                                  &ignore_acpi_ev);
3689                         break;
3690                 case 7:
3691                         /* 0x7000-0x7FFF: misc */
3692                         if (tp_features.hotkey_wlsw &&
3693                                         hkey == TP_HKEY_EV_RFKILL_CHANGED) {
3694                                 tpacpi_send_radiosw_update();
3695                                 send_acpi_ev = 0;
3696                                 known_ev = true;
3697                                 break;
3698                         }
3699                         /* fallthrough to default */
3700                 default:
3701                         known_ev = false;
3702                 }
3703                 if (!known_ev) {
3704                         printk(TPACPI_NOTICE
3705                                "unhandled HKEY event 0x%04x\n", hkey);
3706                         printk(TPACPI_NOTICE
3707                                "please report the conditions when this "
3708                                "event happened to %s\n", TPACPI_MAIL);
3709                 }
3710
3711                 /* Legacy events */
3712                 if (!ignore_acpi_ev &&
3713                     (send_acpi_ev || hotkey_report_mode < 2)) {
3714                         acpi_bus_generate_proc_event(ibm->acpi->device,
3715                                                      event, hkey);
3716                 }
3717
3718                 /* netlink events */
3719                 if (!ignore_acpi_ev && send_acpi_ev) {
3720                         acpi_bus_generate_netlink_event(
3721                                         ibm->acpi->device->pnp.device_class,
3722                                         dev_name(&ibm->acpi->device->dev),
3723                                         event, hkey);
3724                 }
3725         }
3726 }
3727
3728 static void hotkey_suspend(pm_message_t state)
3729 {
3730         /* Do these on suspend, we get the events on early resume! */
3731         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3732         hotkey_autosleep_ack = 0;
3733 }
3734
3735 static void hotkey_resume(void)
3736 {
3737         tpacpi_disable_brightness_delay();
3738
3739         if (hotkey_status_set(true) < 0 ||
3740             hotkey_mask_set(hotkey_acpi_mask) < 0)
3741                 printk(TPACPI_ERR
3742                        "error while attempting to reset the event "
3743                        "firmware interface\n");
3744
3745         tpacpi_send_radiosw_update();
3746         hotkey_tablet_mode_notify_change();
3747         hotkey_wakeup_reason_notify_change();
3748         hotkey_wakeup_hotunplug_complete_notify_change();
3749         hotkey_poll_setup_safe(false);
3750 }
3751
3752 /* procfs -------------------------------------------------------------- */
3753 static int hotkey_read(struct seq_file *m)
3754 {
3755         int res, status;
3756
3757         if (!tp_features.hotkey) {
3758                 seq_printf(m, "status:\t\tnot supported\n");
3759                 return 0;
3760         }
3761
3762         if (mutex_lock_killable(&hotkey_mutex))
3763                 return -ERESTARTSYS;
3764         res = hotkey_status_get(&status);
3765         if (!res)
3766                 res = hotkey_mask_get();
3767         mutex_unlock(&hotkey_mutex);
3768         if (res)
3769                 return res;
3770
3771         seq_printf(m, "status:\t\t%s\n", enabled(status, 0));
3772         if (hotkey_all_mask) {
3773                 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
3774                 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
3775         } else {
3776                 seq_printf(m, "mask:\t\tnot supported\n");
3777                 seq_printf(m, "commands:\tenable, disable, reset\n");
3778         }
3779
3780         return 0;
3781 }
3782
3783 static void hotkey_enabledisable_warn(bool enable)
3784 {
3785         tpacpi_log_usertask("procfs hotkey enable/disable");
3786         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3787                         TPACPI_WARN
3788                         "hotkey enable/disable functionality has been "
3789                         "removed from the driver.  Hotkeys are always "
3790                         "enabled\n"))
3791                 printk(TPACPI_ERR
3792                         "Please remove the hotkey=enable module "
3793                         "parameter, it is deprecated.  Hotkeys are always "
3794                         "enabled\n");
3795 }
3796
3797 static int hotkey_write(char *buf)
3798 {
3799         int res;
3800         u32 mask;
3801         char *cmd;
3802
3803         if (!tp_features.hotkey)
3804                 return -ENODEV;
3805
3806         if (mutex_lock_killable(&hotkey_mutex))
3807                 return -ERESTARTSYS;
3808
3809         mask = hotkey_user_mask;
3810
3811         res = 0;
3812         while ((cmd = next_cmd(&buf))) {
3813                 if (strlencmp(cmd, "enable") == 0) {
3814                         hotkey_enabledisable_warn(1);
3815                 } else if (strlencmp(cmd, "disable") == 0) {
3816                         hotkey_enabledisable_warn(0);
3817                         res = -EPERM;
3818                 } else if (strlencmp(cmd, "reset") == 0) {
3819                         mask = (hotkey_all_mask | hotkey_source_mask)
3820                                 & ~hotkey_reserved_mask;
3821                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3822                         /* mask set */
3823                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3824                         /* mask set */
3825                 } else {
3826                         res = -EINVAL;
3827                         goto errexit;
3828                 }
3829         }
3830
3831         if (!res) {
3832                 tpacpi_disclose_usertask("procfs hotkey",
3833                         "set mask to 0x%08x\n", mask);
3834                 res = hotkey_user_mask_set(mask);
3835         }
3836
3837 errexit:
3838         mutex_unlock(&hotkey_mutex);
3839         return res;
3840 }
3841
3842 static const struct acpi_device_id ibm_htk_device_ids[] = {
3843         {TPACPI_ACPI_HKEY_HID, 0},
3844         {"", 0},
3845 };
3846
3847 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3848         .hid = ibm_htk_device_ids,
3849         .notify = hotkey_notify,
3850         .handle = &hkey_handle,
3851         .type = ACPI_DEVICE_NOTIFY,
3852 };
3853
3854 static struct ibm_struct hotkey_driver_data = {
3855         .name = "hotkey",
3856         .read = hotkey_read,
3857         .write = hotkey_write,
3858         .exit = hotkey_exit,
3859         .resume = hotkey_resume,
3860         .suspend = hotkey_suspend,
3861         .acpi = &ibm_hotkey_acpidriver,
3862 };
3863
3864 /*************************************************************************
3865  * Bluetooth subdriver
3866  */
3867
3868 enum {
3869         /* ACPI GBDC/SBDC bits */
3870         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3871         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3872         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3873                                                    off / last state */
3874 };
3875
3876 enum {
3877         /* ACPI \BLTH commands */
3878         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3879         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3880         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3881         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3882         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3883 };
3884
3885 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3886
3887 static int bluetooth_get_status(void)
3888 {
3889         int status;
3890
3891 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3892         if (dbg_bluetoothemul)
3893                 return (tpacpi_bluetooth_emulstate) ?
3894                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3895 #endif
3896
3897         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3898                 return -EIO;
3899
3900         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3901                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3902 }
3903
3904 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3905 {
3906         int status;
3907
3908         vdbg_printk(TPACPI_DBG_RFKILL,
3909                 "will attempt to %s bluetooth\n",
3910                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3911
3912 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3913         if (dbg_bluetoothemul) {
3914                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3915                 return 0;
3916         }
3917 #endif
3918
3919         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3920         status = TP_ACPI_BLUETOOTH_RESUMECTRL;
3921         if (state == TPACPI_RFK_RADIO_ON)
3922                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
3923
3924         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3925                 return -EIO;
3926
3927         return 0;
3928 }
3929
3930 /* sysfs bluetooth enable ---------------------------------------------- */
3931 static ssize_t bluetooth_enable_show(struct device *dev,
3932                            struct device_attribute *attr,
3933                            char *buf)
3934 {
3935         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3936                         attr, buf);
3937 }
3938
3939 static ssize_t bluetooth_enable_store(struct device *dev,
3940                             struct device_attribute *attr,
3941                             const char *buf, size_t count)
3942 {
3943         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3944                                 attr, buf, count);
3945 }
3946
3947 static struct device_attribute dev_attr_bluetooth_enable =
3948         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3949                 bluetooth_enable_show, bluetooth_enable_store);
3950
3951 /* --------------------------------------------------------------------- */
3952
3953 static struct attribute *bluetooth_attributes[] = {
3954         &dev_attr_bluetooth_enable.attr,
3955         NULL
3956 };
3957
3958 static const struct attribute_group bluetooth_attr_group = {
3959         .attrs = bluetooth_attributes,
3960 };
3961
3962 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3963         .get_status = bluetooth_get_status,
3964         .set_status = bluetooth_set_status,
3965 };
3966
3967 static void bluetooth_shutdown(void)
3968 {
3969         /* Order firmware to save current state to NVRAM */
3970         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3971                         TP_ACPI_BLTH_SAVE_STATE))
3972                 printk(TPACPI_NOTICE
3973                         "failed to save bluetooth state to NVRAM\n");
3974         else
3975                 vdbg_printk(TPACPI_DBG_RFKILL,
3976                         "bluestooth state saved to NVRAM\n");
3977 }
3978
3979 static void bluetooth_exit(void)
3980 {
3981         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3982                         &bluetooth_attr_group);
3983
3984         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3985
3986         bluetooth_shutdown();
3987 }
3988
3989 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3990 {
3991         int res;
3992         int status = 0;
3993
3994         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3995                         "initializing bluetooth subdriver\n");
3996
3997         TPACPI_ACPIHANDLE_INIT(hkey);
3998
3999         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4000            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4001         tp_features.bluetooth = hkey_handle &&
4002             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4003
4004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4005                 "bluetooth is %s, status 0x%02x\n",
4006                 str_supported(tp_features.bluetooth),
4007                 status);
4008
4009 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4010         if (dbg_bluetoothemul) {
4011                 tp_features.bluetooth = 1;
4012                 printk(TPACPI_INFO
4013                         "bluetooth switch emulation enabled\n");
4014         } else
4015 #endif
4016         if (tp_features.bluetooth &&
4017             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4018                 /* no bluetooth hardware present in system */
4019                 tp_features.bluetooth = 0;
4020                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4021                            "bluetooth hardware not installed\n");
4022         }
4023
4024         if (!tp_features.bluetooth)
4025                 return 1;
4026
4027         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4028                                 &bluetooth_tprfk_ops,
4029                                 RFKILL_TYPE_BLUETOOTH,
4030                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
4031                                 true);
4032         if (res)
4033                 return res;
4034
4035         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4036                                 &bluetooth_attr_group);
4037         if (res) {
4038                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4039                 return res;
4040         }
4041
4042         return 0;
4043 }
4044
4045 /* procfs -------------------------------------------------------------- */
4046 static int bluetooth_read(struct seq_file *m)
4047 {
4048         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4049 }
4050
4051 static int bluetooth_write(char *buf)
4052 {
4053         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4054 }
4055
4056 static struct ibm_struct bluetooth_driver_data = {
4057         .name = "bluetooth",
4058         .read = bluetooth_read,
4059         .write = bluetooth_write,
4060         .exit = bluetooth_exit,
4061         .shutdown = bluetooth_shutdown,
4062 };
4063
4064 /*************************************************************************
4065  * Wan subdriver
4066  */
4067
4068 enum {
4069         /* ACPI GWAN/SWAN bits */
4070         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
4071         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
4072         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
4073                                                    off / last state */
4074 };
4075
4076 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
4077
4078 static int wan_get_status(void)
4079 {
4080         int status;
4081
4082 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4083         if (dbg_wwanemul)
4084                 return (tpacpi_wwan_emulstate) ?
4085                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4086 #endif
4087
4088         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4089                 return -EIO;
4090
4091         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4092                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4093 }
4094
4095 static int wan_set_status(enum tpacpi_rfkill_state state)
4096 {
4097         int status;
4098
4099         vdbg_printk(TPACPI_DBG_RFKILL,
4100                 "will attempt to %s wwan\n",
4101                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4102
4103 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4104         if (dbg_wwanemul) {
4105                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4106                 return 0;
4107         }
4108 #endif
4109
4110         /* We make sure to set TP_ACPI_WANCARD_RESUMECTRL */
4111         status = TP_ACPI_WANCARD_RESUMECTRL;
4112         if (state == TPACPI_RFK_RADIO_ON)
4113                 status |= TP_ACPI_WANCARD_RADIOSSW;
4114
4115         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4116                 return -EIO;
4117
4118         return 0;
4119 }
4120
4121 /* sysfs wan enable ---------------------------------------------------- */
4122 static ssize_t wan_enable_show(struct device *dev,
4123                            struct device_attribute *attr,
4124                            char *buf)
4125 {
4126         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4127                         attr, buf);
4128 }
4129
4130 static ssize_t wan_enable_store(struct device *dev,
4131                             struct device_attribute *attr,
4132                             const char *buf, size_t count)
4133 {
4134         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4135                         attr, buf, count);
4136 }
4137
4138 static struct device_attribute dev_attr_wan_enable =
4139         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4140                 wan_enable_show, wan_enable_store);
4141
4142 /* --------------------------------------------------------------------- */
4143
4144 static struct attribute *wan_attributes[] = {
4145         &dev_attr_wan_enable.attr,
4146         NULL
4147 };
4148
4149 static const struct attribute_group wan_attr_group = {
4150         .attrs = wan_attributes,
4151 };
4152
4153 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4154         .get_status = wan_get_status,
4155         .set_status = wan_set_status,
4156 };
4157
4158 static void wan_shutdown(void)
4159 {
4160         /* Order firmware to save current state to NVRAM */
4161         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4162                         TP_ACPI_WGSV_SAVE_STATE))
4163                 printk(TPACPI_NOTICE
4164                         "failed to save WWAN state to NVRAM\n");
4165         else
4166                 vdbg_printk(TPACPI_DBG_RFKILL,
4167                         "WWAN state saved to NVRAM\n");
4168 }
4169
4170 static void wan_exit(void)
4171 {
4172         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
4173                 &wan_attr_group);
4174
4175         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4176
4177         wan_shutdown();
4178 }
4179
4180 static int __init wan_init(struct ibm_init_struct *iibm)
4181 {
4182         int res;
4183         int status = 0;
4184
4185         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4186                         "initializing wan subdriver\n");
4187
4188         TPACPI_ACPIHANDLE_INIT(hkey);
4189
4190         tp_features.wan = hkey_handle &&
4191             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4192
4193         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4194                 "wan is %s, status 0x%02x\n",
4195                 str_supported(tp_features.wan),
4196                 status);
4197
4198 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4199         if (dbg_wwanemul) {
4200                 tp_features.wan = 1;
4201                 printk(TPACPI_INFO
4202                         "wwan switch emulation enabled\n");
4203         } else
4204 #endif
4205         if (tp_features.wan &&
4206             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4207                 /* no wan hardware present in system */
4208                 tp_features.wan = 0;
4209                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4210                            "wan hardware not installed\n");
4211         }
4212
4213         if (!tp_features.wan)
4214                 return 1;
4215
4216         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4217                                 &wan_tprfk_ops,
4218                                 RFKILL_TYPE_WWAN,
4219                                 TPACPI_RFK_WWAN_SW_NAME,
4220                                 true);
4221         if (res)
4222                 return res;
4223
4224         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
4225                                 &wan_attr_group);
4226
4227         if (res) {
4228                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4229                 return res;
4230         }
4231
4232         return 0;
4233 }
4234
4235 /* procfs -------------------------------------------------------------- */
4236 static int wan_read(struct seq_file *m)
4237 {
4238         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4239 }
4240
4241 static int wan_write(char *buf)
4242 {
4243         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4244 }
4245
4246 static struct ibm_struct wan_driver_data = {
4247         .name = "wan",
4248         .read = wan_read,
4249         .write = wan_write,
4250         .exit = wan_exit,
4251         .shutdown = wan_shutdown,
4252 };
4253
4254 /*************************************************************************
4255  * UWB subdriver
4256  */
4257
4258 enum {
4259         /* ACPI GUWB/SUWB bits */
4260         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4261         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4262 };
4263
4264 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4265
4266 static int uwb_get_status(void)
4267 {
4268         int status;
4269
4270 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4271         if (dbg_uwbemul)
4272                 return (tpacpi_uwb_emulstate) ?
4273                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4274 #endif
4275
4276         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4277                 return -EIO;
4278
4279         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4280                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4281 }
4282
4283 static int uwb_set_status(enum tpacpi_rfkill_state state)
4284 {
4285         int status;
4286
4287         vdbg_printk(TPACPI_DBG_RFKILL,
4288                 "will attempt to %s UWB\n",
4289                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4290
4291 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4292         if (dbg_uwbemul) {
4293                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4294                 return 0;
4295         }
4296 #endif
4297
4298         if (state == TPACPI_RFK_RADIO_ON)
4299                 status = TP_ACPI_UWB_RADIOSSW;
4300         else
4301                 status = 0;
4302
4303         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4304                 return -EIO;
4305
4306         return 0;
4307 }
4308
4309 /* --------------------------------------------------------------------- */
4310
4311 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4312         .get_status = uwb_get_status,
4313         .set_status = uwb_set_status,
4314 };
4315
4316 static void uwb_exit(void)
4317 {
4318         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4319 }
4320
4321 static int __init uwb_init(struct ibm_init_struct *iibm)
4322 {
4323         int res;
4324         int status = 0;
4325
4326         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4327                         "initializing uwb subdriver\n");
4328
4329         TPACPI_ACPIHANDLE_INIT(hkey);
4330
4331         tp_features.uwb = hkey_handle &&
4332             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4333
4334         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4335                 "uwb is %s, status 0x%02x\n",
4336                 str_supported(tp_features.uwb),
4337                 status);
4338
4339 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4340         if (dbg_uwbemul) {
4341                 tp_features.uwb = 1;
4342                 printk(TPACPI_INFO
4343                         "uwb switch emulation enabled\n");
4344         } else
4345 #endif
4346         if (tp_features.uwb &&
4347             !(status & TP_ACPI_UWB_HWPRESENT)) {
4348                 /* no uwb hardware present in system */
4349                 tp_features.uwb = 0;
4350                 dbg_printk(TPACPI_DBG_INIT,
4351                            "uwb hardware not installed\n");
4352         }
4353
4354         if (!tp_features.uwb)
4355                 return 1;
4356
4357         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4358                                 &uwb_tprfk_ops,
4359                                 RFKILL_TYPE_UWB,
4360                                 TPACPI_RFK_UWB_SW_NAME,
4361                                 false);
4362         return res;
4363 }
4364
4365 static struct ibm_struct uwb_driver_data = {
4366         .name = "uwb",
4367         .exit = uwb_exit,
4368         .flags.experimental = 1,
4369 };
4370
4371 /*************************************************************************
4372  * Video subdriver
4373  */
4374
4375 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4376
4377 enum video_access_mode {
4378         TPACPI_VIDEO_NONE = 0,
4379         TPACPI_VIDEO_570,       /* 570 */
4380         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4381         TPACPI_VIDEO_NEW,       /* all others */
4382 };
4383
4384 enum {  /* video status flags, based on VIDEO_570 */
4385         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4386         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4387         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4388 };
4389
4390 enum {  /* TPACPI_VIDEO_570 constants */
4391         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4392         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4393                                                  * video_status_flags */
4394         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4395         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4396 };
4397
4398 static enum video_access_mode video_supported;
4399 static int video_orig_autosw;
4400
4401 static int video_autosw_get(void);
4402 static int video_autosw_set(int enable);
4403
4404 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4405
4406 static int __init video_init(struct ibm_init_struct *iibm)
4407 {
4408         int ivga;
4409
4410         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4411
4412         TPACPI_ACPIHANDLE_INIT(vid);
4413         TPACPI_ACPIHANDLE_INIT(vid2);
4414
4415         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4416                 /* G41, assume IVGA doesn't change */
4417                 vid_handle = vid2_handle;
4418
4419         if (!vid_handle)
4420                 /* video switching not supported on R30, R31 */
4421                 video_supported = TPACPI_VIDEO_NONE;
4422         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4423                 /* 570 */
4424                 video_supported = TPACPI_VIDEO_570;
4425         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4426                 /* 600e/x, 770e, 770x */
4427                 video_supported = TPACPI_VIDEO_770;
4428         else
4429                 /* all others */
4430                 video_supported = TPACPI_VIDEO_NEW;
4431
4432         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4433                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4434                 video_supported);
4435
4436         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4437 }
4438
4439 static void video_exit(void)
4440 {
4441         dbg_printk(TPACPI_DBG_EXIT,
4442                    "restoring original video autoswitch mode\n");
4443         if (video_autosw_set(video_orig_autosw))
4444                 printk(TPACPI_ERR "error while trying to restore original "
4445                         "video autoswitch mode\n");
4446 }
4447
4448 static int video_outputsw_get(void)
4449 {
4450         int status = 0;
4451         int i;
4452
4453         switch (video_supported) {
4454         case TPACPI_VIDEO_570:
4455                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4456                                  TP_ACPI_VIDEO_570_PHSCMD))
4457                         return -EIO;
4458                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4459                 break;
4460         case TPACPI_VIDEO_770:
4461                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4462                         return -EIO;
4463                 if (i)
4464                         status |= TP_ACPI_VIDEO_S_LCD;
4465                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4466                         return -EIO;
4467                 if (i)
4468                         status |= TP_ACPI_VIDEO_S_CRT;
4469                 break;
4470         case TPACPI_VIDEO_NEW:
4471                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4472                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4473                         return -EIO;
4474                 if (i)
4475                         status |= TP_ACPI_VIDEO_S_CRT;
4476
4477                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4478                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4479                         return -EIO;
4480                 if (i)
4481                         status |= TP_ACPI_VIDEO_S_LCD;
4482                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4483                         return -EIO;
4484                 if (i)
4485                         status |= TP_ACPI_VIDEO_S_DVI;
4486                 break;
4487         default:
4488                 return -ENOSYS;
4489         }
4490
4491         return status;
4492 }
4493
4494 static int video_outputsw_set(int status)
4495 {
4496         int autosw;
4497         int res = 0;
4498
4499         switch (video_supported) {
4500         case TPACPI_VIDEO_570:
4501                 res = acpi_evalf(NULL, NULL,
4502                                  "\\_SB.PHS2", "vdd",
4503                                  TP_ACPI_VIDEO_570_PHS2CMD,
4504                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4505                 break;
4506         case TPACPI_VIDEO_770:
4507                 autosw = video_autosw_get();
4508                 if (autosw < 0)
4509                         return autosw;
4510
4511                 res = video_autosw_set(1);
4512                 if (res)
4513                         return res;
4514                 res = acpi_evalf(vid_handle, NULL,
4515                                  "ASWT", "vdd", status * 0x100, 0);
4516                 if (!autosw && video_autosw_set(autosw)) {
4517                         printk(TPACPI_ERR
4518                                "video auto-switch left enabled due to error\n");
4519                         return -EIO;
4520                 }
4521                 break;
4522         case TPACPI_VIDEO_NEW:
4523                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4524                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4525                 break;
4526         default:
4527                 return -ENOSYS;
4528         }
4529
4530         return (res)? 0 : -EIO;
4531 }
4532
4533 static int video_autosw_get(void)
4534 {
4535         int autosw = 0;
4536
4537         switch (video_supported) {
4538         case TPACPI_VIDEO_570:
4539                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4540                         return -EIO;
4541                 break;
4542         case TPACPI_VIDEO_770:
4543         case TPACPI_VIDEO_NEW:
4544                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4545                         return -EIO;
4546                 break;
4547         default:
4548                 return -ENOSYS;
4549         }
4550
4551         return autosw & 1;
4552 }
4553
4554 static int video_autosw_set(int enable)
4555 {
4556         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4557                 return -EIO;
4558         return 0;
4559 }
4560
4561 static int video_outputsw_cycle(void)
4562 {
4563         int autosw = video_autosw_get();
4564         int res;
4565
4566         if (autosw < 0)
4567                 return autosw;
4568
4569         switch (video_supported) {
4570         case TPACPI_VIDEO_570:
4571                 res = video_autosw_set(1);
4572                 if (res)
4573                         return res;
4574                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4575                 break;
4576         case TPACPI_VIDEO_770:
4577         case TPACPI_VIDEO_NEW:
4578                 res = video_autosw_set(1);
4579                 if (res)
4580                         return res;
4581                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4582                 break;
4583         default:
4584                 return -ENOSYS;
4585         }
4586         if (!autosw && video_autosw_set(autosw)) {
4587                 printk(TPACPI_ERR
4588                        "video auto-switch left enabled due to error\n");
4589                 return -EIO;
4590         }
4591
4592         return (res)? 0 : -EIO;
4593 }
4594
4595 static int video_expand_toggle(void)
4596 {
4597         switch (video_supported) {
4598         case TPACPI_VIDEO_570:
4599                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4600                         0 : -EIO;
4601         case TPACPI_VIDEO_770:
4602                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4603                         0 : -EIO;
4604         case TPACPI_VIDEO_NEW:
4605                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4606                         0 : -EIO;
4607         default:
4608                 return -ENOSYS;
4609         }
4610         /* not reached */
4611 }
4612
4613 static int video_read(struct seq_file *m)
4614 {
4615         int status, autosw;
4616
4617         if (video_supported == TPACPI_VIDEO_NONE) {
4618                 seq_printf(m, "status:\t\tnot supported\n");
4619                 return 0;
4620         }
4621
4622         status = video_outputsw_get();
4623         if (status < 0)
4624                 return status;
4625
4626         autosw = video_autosw_get();
4627         if (autosw < 0)
4628                 return autosw;
4629
4630         seq_printf(m, "status:\t\tsupported\n");
4631         seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0));
4632         seq_printf(m, "crt:\t\t%s\n", enabled(status, 1));
4633         if (video_supported == TPACPI_VIDEO_NEW)
4634                 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3));
4635         seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0));
4636         seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
4637         seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
4638         if (video_supported == TPACPI_VIDEO_NEW)
4639                 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
4640         seq_printf(m, "commands:\tauto_enable, auto_disable\n");
4641         seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
4642
4643         return 0;
4644 }
4645
4646 static int video_write(char *buf)
4647 {
4648         char *cmd;
4649         int enable, disable, status;
4650         int res;
4651
4652         if (video_supported == TPACPI_VIDEO_NONE)
4653                 return -ENODEV;
4654
4655         enable = 0;
4656         disable = 0;
4657
4658         while ((cmd = next_cmd(&buf))) {
4659                 if (strlencmp(cmd, "lcd_enable") == 0) {
4660                         enable |= TP_ACPI_VIDEO_S_LCD;
4661                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4662                         disable |= TP_ACPI_VIDEO_S_LCD;
4663                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4664                         enable |= TP_ACPI_VIDEO_S_CRT;
4665                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4666                         disable |= TP_ACPI_VIDEO_S_CRT;
4667                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4668                            strlencmp(cmd, "dvi_enable") == 0) {
4669                         enable |= TP_ACPI_VIDEO_S_DVI;
4670                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4671                            strlencmp(cmd, "dvi_disable") == 0) {
4672                         disable |= TP_ACPI_VIDEO_S_DVI;
4673                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4674                         res = video_autosw_set(1);
4675                         if (res)
4676                                 return res;
4677                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4678                         res = video_autosw_set(0);
4679                         if (res)
4680                                 return res;
4681                 } else if (strlencmp(cmd, "video_switch") == 0) {
4682                         res = video_outputsw_cycle();
4683                         if (res)
4684                                 return res;
4685                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4686                         res = video_expand_toggle();
4687                         if (res)
4688                                 return res;
4689                 } else
4690                         return -EINVAL;
4691         }
4692
4693         if (enable || disable) {
4694                 status = video_outputsw_get();
4695                 if (status < 0)
4696                         return status;
4697                 res = video_outputsw_set((status & ~disable) | enable);
4698                 if (res)
4699                         return res;
4700         }
4701
4702         return 0;
4703 }
4704
4705 static struct ibm_struct video_driver_data = {
4706         .name = "video",
4707         .read = video_read,
4708         .write = video_write,
4709         .exit = video_exit,
4710 };
4711
4712 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4713
4714 /*************************************************************************
4715  * Light (thinklight) subdriver
4716  */
4717
4718 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4719 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4720
4721 static int light_get_status(void)
4722 {
4723         int status = 0;
4724
4725         if (tp_features.light_status) {
4726                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4727                         return -EIO;
4728                 return (!!status);
4729         }
4730
4731         return -ENXIO;
4732 }
4733
4734 static int light_set_status(int status)
4735 {
4736         int rc;
4737
4738         if (tp_features.light) {
4739                 if (cmos_handle) {
4740                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4741                                         (status)?
4742                                                 TP_CMOS_THINKLIGHT_ON :
4743                                                 TP_CMOS_THINKLIGHT_OFF);
4744                 } else {
4745                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4746                                         (status)? 1 : 0);
4747                 }
4748                 return (rc)? 0 : -EIO;
4749         }
4750
4751         return -ENXIO;
4752 }
4753
4754 static void light_set_status_worker(struct work_struct *work)
4755 {
4756         struct tpacpi_led_classdev *data =
4757                         container_of(work, struct tpacpi_led_classdev, work);
4758
4759         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4760                 light_set_status((data->new_state != TPACPI_LED_OFF));
4761 }
4762
4763 static void light_sysfs_set(struct led_classdev *led_cdev,
4764                         enum led_brightness brightness)
4765 {
4766         struct tpacpi_led_classdev *data =
4767                 container_of(led_cdev,
4768                              struct tpacpi_led_classdev,
4769                              led_classdev);
4770         data->new_state = (brightness != LED_OFF) ?
4771                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4772         queue_work(tpacpi_wq, &data->work);
4773 }
4774
4775 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4776 {
4777         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4778 }
4779
4780 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4781         .led_classdev = {
4782                 .name           = "tpacpi::thinklight",
4783                 .brightness_set = &light_sysfs_set,
4784                 .brightness_get = &light_sysfs_get,
4785         }
4786 };
4787
4788 static int __init light_init(struct ibm_init_struct *iibm)
4789 {
4790         int rc;
4791
4792         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4793
4794         TPACPI_ACPIHANDLE_INIT(ledb);
4795         TPACPI_ACPIHANDLE_INIT(lght);
4796         TPACPI_ACPIHANDLE_INIT(cmos);
4797         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4798
4799         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4800         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4801
4802         if (tp_features.light)
4803                 /* light status not supported on
4804                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4805                 tp_features.light_status =
4806                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4807
4808         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4809                 str_supported(tp_features.light),
4810                 str_supported(tp_features.light_status));
4811
4812         if (!tp_features.light)
4813                 return 1;
4814
4815         rc = led_classdev_register(&tpacpi_pdev->dev,
4816                                    &tpacpi_led_thinklight.led_classdev);
4817
4818         if (rc < 0) {
4819                 tp_features.light = 0;
4820                 tp_features.light_status = 0;
4821         } else  {
4822                 rc = 0;
4823         }
4824
4825         return rc;
4826 }
4827
4828 static void light_exit(void)
4829 {
4830         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4831         if (work_pending(&tpacpi_led_thinklight.work))
4832                 flush_workqueue(tpacpi_wq);
4833 }
4834
4835 static int light_read(struct seq_file *m)
4836 {
4837         int status;
4838
4839         if (!tp_features.light) {
4840                 seq_printf(m, "status:\t\tnot supported\n");
4841         } else if (!tp_features.light_status) {
4842                 seq_printf(m, "status:\t\tunknown\n");
4843                 seq_printf(m, "commands:\ton, off\n");
4844         } else {
4845                 status = light_get_status();
4846                 if (status < 0)
4847                         return status;
4848                 seq_printf(m, "status:\t\t%s\n", onoff(status, 0));
4849                 seq_printf(m, "commands:\ton, off\n");
4850         }
4851
4852         return 0;
4853 }
4854
4855 static int light_write(char *buf)
4856 {
4857         char *cmd;
4858         int newstatus = 0;
4859
4860         if (!tp_features.light)
4861                 return -ENODEV;
4862
4863         while ((cmd = next_cmd(&buf))) {
4864                 if (strlencmp(cmd, "on") == 0) {
4865                         newstatus = 1;
4866                 } else if (strlencmp(cmd, "off") == 0) {
4867                         newstatus = 0;
4868                 } else
4869                         return -EINVAL;
4870         }
4871
4872         return light_set_status(newstatus);
4873 }
4874
4875 static struct ibm_struct light_driver_data = {
4876         .name = "light",
4877         .read = light_read,
4878         .write = light_write,
4879         .exit = light_exit,
4880 };
4881
4882 /*************************************************************************
4883  * CMOS subdriver
4884  */
4885
4886 /* sysfs cmos_command -------------------------------------------------- */
4887 static ssize_t cmos_command_store(struct device *dev,
4888                             struct device_attribute *attr,
4889                             const char *buf, size_t count)
4890 {
4891         unsigned long cmos_cmd;
4892         int res;
4893
4894         if (parse_strtoul(buf, 21, &cmos_cmd))
4895                 return -EINVAL;
4896
4897         res = issue_thinkpad_cmos_command(cmos_cmd);
4898         return (res)? res : count;
4899 }
4900
4901 static struct device_attribute dev_attr_cmos_command =
4902         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4903
4904 /* --------------------------------------------------------------------- */
4905
4906 static int __init cmos_init(struct ibm_init_struct *iibm)
4907 {
4908         int res;
4909
4910         vdbg_printk(TPACPI_DBG_INIT,
4911                 "initializing cmos commands subdriver\n");
4912
4913         TPACPI_ACPIHANDLE_INIT(cmos);
4914
4915         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4916                 str_supported(cmos_handle != NULL));
4917
4918         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4919         if (res)
4920                 return res;
4921
4922         return (cmos_handle)? 0 : 1;
4923 }
4924
4925 static void cmos_exit(void)
4926 {
4927         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4928 }
4929
4930 static int cmos_read(struct seq_file *m)
4931 {
4932         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4933            R30, R31, T20-22, X20-21 */
4934         if (!cmos_handle)
4935                 seq_printf(m, "status:\t\tnot supported\n");
4936         else {
4937                 seq_printf(m, "status:\t\tsupported\n");
4938                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
4939         }
4940
4941         return 0;
4942 }
4943
4944 static int cmos_write(char *buf)
4945 {
4946         char *cmd;
4947         int cmos_cmd, res;
4948
4949         while ((cmd = next_cmd(&buf))) {
4950                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4951                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4952                         /* cmos_cmd set */
4953                 } else
4954                         return -EINVAL;
4955
4956                 res = issue_thinkpad_cmos_command(cmos_cmd);
4957                 if (res)
4958                         return res;
4959         }
4960
4961         return 0;
4962 }
4963
4964 static struct ibm_struct cmos_driver_data = {
4965         .name = "cmos",
4966         .read = cmos_read,
4967         .write = cmos_write,
4968         .exit = cmos_exit,
4969 };
4970
4971 /*************************************************************************
4972  * LED subdriver
4973  */
4974
4975 enum led_access_mode {
4976         TPACPI_LED_NONE = 0,
4977         TPACPI_LED_570, /* 570 */
4978         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4979         TPACPI_LED_NEW, /* all others */
4980 };
4981
4982 enum {  /* For TPACPI_LED_OLD */
4983         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4984         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4985         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4986 };
4987
4988 static enum led_access_mode led_supported;
4989
4990 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4991            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4992                                 /* T20-22, X20-21 */
4993            "LED",               /* all others */
4994            );                   /* R30, R31 */
4995
4996 #define TPACPI_LED_NUMLEDS 16
4997 static struct tpacpi_led_classdev *tpacpi_leds;
4998 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4999 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5000         /* there's a limit of 19 chars + NULL before 2.6.26 */
5001         "tpacpi::power",
5002         "tpacpi:orange:batt",
5003         "tpacpi:green:batt",
5004         "tpacpi::dock_active",
5005         "tpacpi::bay_active",
5006         "tpacpi::dock_batt",
5007         "tpacpi::unknown_led",
5008         "tpacpi::standby",
5009         "tpacpi::dock_status1",
5010         "tpacpi::dock_status2",
5011         "tpacpi::unknown_led2",
5012         "tpacpi::unknown_led3",
5013         "tpacpi::thinkvantage",
5014 };
5015 #define TPACPI_SAFE_LEDS        0x1081U
5016
5017 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5018 {
5019 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5020         return false;
5021 #else
5022         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5023 #endif
5024 }
5025
5026 static int led_get_status(const unsigned int led)
5027 {
5028         int status;
5029         enum led_status_t led_s;
5030
5031         switch (led_supported) {
5032         case TPACPI_LED_570:
5033                 if (!acpi_evalf(ec_handle,
5034                                 &status, "GLED", "dd", 1 << led))
5035                         return -EIO;
5036                 led_s = (status == 0)?
5037                                 TPACPI_LED_OFF :
5038                                 ((status == 1)?
5039                                         TPACPI_LED_ON :
5040                                         TPACPI_LED_BLINK);
5041                 tpacpi_led_state_cache[led] = led_s;
5042                 return led_s;
5043         default:
5044                 return -ENXIO;
5045         }
5046
5047         /* not reached */
5048 }
5049
5050 static int led_set_status(const unsigned int led,
5051                           const enum led_status_t ledstatus)
5052 {
5053         /* off, on, blink. Index is led_status_t */
5054         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5055         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5056
5057         int rc = 0;
5058
5059         switch (led_supported) {
5060         case TPACPI_LED_570:
5061                 /* 570 */
5062                 if (unlikely(led > 7))
5063                         return -EINVAL;
5064                 if (unlikely(tpacpi_is_led_restricted(led)))
5065                         return -EPERM;
5066                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5067                                 (1 << led), led_sled_arg1[ledstatus]))
5068                         rc = -EIO;
5069                 break;
5070         case TPACPI_LED_OLD:
5071                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5072                 if (unlikely(led > 7))
5073                         return -EINVAL;
5074                 if (unlikely(tpacpi_is_led_restricted(led)))
5075                         return -EPERM;
5076                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5077                 if (rc >= 0)
5078                         rc = ec_write(TPACPI_LED_EC_HLBL,
5079                                       (ledstatus == TPACPI_LED_BLINK) << led);
5080                 if (rc >= 0)
5081                         rc = ec_write(TPACPI_LED_EC_HLCL,
5082                                       (ledstatus != TPACPI_LED_OFF) << led);
5083                 break;
5084         case TPACPI_LED_NEW:
5085                 /* all others */
5086                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
5087                         return -EINVAL;
5088                 if (unlikely(tpacpi_is_led_restricted(led)))
5089                         return -EPERM;
5090                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5091                                 led, led_led_arg1[ledstatus]))
5092                         rc = -EIO;
5093                 break;
5094         default:
5095                 rc = -ENXIO;
5096         }
5097
5098         if (!rc)
5099                 tpacpi_led_state_cache[led] = ledstatus;
5100
5101         return rc;
5102 }
5103
5104 static void led_set_status_worker(struct work_struct *work)
5105 {
5106         struct tpacpi_led_classdev *data =
5107                 container_of(work, struct tpacpi_led_classdev, work);
5108
5109         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
5110                 led_set_status(data->led, data->new_state);
5111 }
5112
5113 static void led_sysfs_set(struct led_classdev *led_cdev,
5114                         enum led_brightness brightness)
5115 {
5116         struct tpacpi_led_classdev *data = container_of(led_cdev,
5117                              struct tpacpi_led_classdev, led_classdev);
5118
5119         if (brightness == LED_OFF)
5120                 data->new_state = TPACPI_LED_OFF;
5121         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5122                 data->new_state = TPACPI_LED_ON;
5123         else
5124                 data->new_state = TPACPI_LED_BLINK;
5125
5126         queue_work(tpacpi_wq, &data->work);
5127 }
5128
5129 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5130                         unsigned long *delay_on, unsigned long *delay_off)
5131 {
5132         struct tpacpi_led_classdev *data = container_of(led_cdev,
5133                              struct tpacpi_led_classdev, led_classdev);
5134
5135         /* Can we choose the flash rate? */
5136         if (*delay_on == 0 && *delay_off == 0) {
5137                 /* yes. set them to the hardware blink rate (1 Hz) */
5138                 *delay_on = 500; /* ms */
5139                 *delay_off = 500; /* ms */
5140         } else if ((*delay_on != 500) || (*delay_off != 500))
5141                 return -EINVAL;
5142
5143         data->new_state = TPACPI_LED_BLINK;
5144         queue_work(tpacpi_wq, &data->work);
5145
5146         return 0;
5147 }
5148
5149 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5150 {
5151         int rc;
5152
5153         struct tpacpi_led_classdev *data = container_of(led_cdev,
5154                              struct tpacpi_led_classdev, led_classdev);
5155
5156         rc = led_get_status(data->led);
5157
5158         if (rc == TPACPI_LED_OFF || rc < 0)
5159                 rc = LED_OFF;   /* no error handling in led class :( */
5160         else
5161                 rc = LED_FULL;
5162
5163         return rc;
5164 }
5165
5166 static void led_exit(void)
5167 {
5168         unsigned int i;
5169
5170         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5171                 if (tpacpi_leds[i].led_classdev.name)
5172                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5173         }
5174
5175         kfree(tpacpi_leds);
5176 }
5177
5178 static int __init tpacpi_init_led(unsigned int led)
5179 {
5180         int rc;
5181
5182         tpacpi_leds[led].led = led;
5183
5184         /* LEDs with no name don't get registered */
5185         if (!tpacpi_led_names[led])
5186                 return 0;
5187
5188         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5189         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5190         if (led_supported == TPACPI_LED_570)
5191                 tpacpi_leds[led].led_classdev.brightness_get =
5192                                                 &led_sysfs_get;
5193
5194         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5195
5196         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5197
5198         rc = led_classdev_register(&tpacpi_pdev->dev,
5199                                 &tpacpi_leds[led].led_classdev);
5200         if (rc < 0)
5201                 tpacpi_leds[led].led_classdev.name = NULL;
5202
5203         return rc;
5204 }
5205
5206 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5207         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5208         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5209         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5210
5211         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5212         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5213         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5214         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5215         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5216         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5217         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5218         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5219
5220         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5221         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5222         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5223         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5224         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5225
5226         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5227         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5228         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5229         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5230
5231         /* (1) - may have excess leds enabled on MSB */
5232
5233         /* Defaults (order matters, keep last, don't reorder!) */
5234         { /* Lenovo */
5235           .vendor = PCI_VENDOR_ID_LENOVO,
5236           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5237           .quirks = 0x1fffU,
5238         },
5239         { /* IBM ThinkPads with no EC version string */
5240           .vendor = PCI_VENDOR_ID_IBM,
5241           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5242           .quirks = 0x00ffU,
5243         },
5244         { /* IBM ThinkPads with EC version string */
5245           .vendor = PCI_VENDOR_ID_IBM,
5246           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5247           .quirks = 0x00bfU,
5248         },
5249 };
5250
5251 #undef TPACPI_LEDQ_IBM
5252 #undef TPACPI_LEDQ_LNV
5253
5254 static int __init led_init(struct ibm_init_struct *iibm)
5255 {
5256         unsigned int i;
5257         int rc;
5258         unsigned long useful_leds;
5259
5260         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5261
5262         TPACPI_ACPIHANDLE_INIT(led);
5263
5264         if (!led_handle)
5265                 /* led not supported on R30, R31 */
5266                 led_supported = TPACPI_LED_NONE;
5267         else if (strlencmp(led_path, "SLED") == 0)
5268                 /* 570 */
5269                 led_supported = TPACPI_LED_570;
5270         else if (strlencmp(led_path, "SYSL") == 0)
5271                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5272                 led_supported = TPACPI_LED_OLD;
5273         else
5274                 /* all others */
5275                 led_supported = TPACPI_LED_NEW;
5276
5277         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5278                 str_supported(led_supported), led_supported);
5279
5280         if (led_supported == TPACPI_LED_NONE)
5281                 return 1;
5282
5283         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5284                               GFP_KERNEL);
5285         if (!tpacpi_leds) {
5286                 printk(TPACPI_ERR "Out of memory for LED data\n");
5287                 return -ENOMEM;
5288         }
5289
5290         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5291                                           ARRAY_SIZE(led_useful_qtable));
5292
5293         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5294                 if (!tpacpi_is_led_restricted(i) &&
5295                     test_bit(i, &useful_leds)) {
5296                         rc = tpacpi_init_led(i);
5297                         if (rc < 0) {
5298                                 led_exit();
5299                                 return rc;
5300                         }
5301                 }
5302         }
5303
5304 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5305         printk(TPACPI_NOTICE
5306                 "warning: userspace override of important "
5307                 "firmware LEDs is enabled\n");
5308 #endif
5309         return 0;
5310 }
5311
5312 #define str_led_status(s) \
5313         ((s) == TPACPI_LED_OFF ? "off" : \
5314                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5315
5316 static int led_read(struct seq_file *m)
5317 {
5318         if (!led_supported) {
5319                 seq_printf(m, "status:\t\tnot supported\n");
5320                 return 0;
5321         }
5322         seq_printf(m, "status:\t\tsupported\n");
5323
5324         if (led_supported == TPACPI_LED_570) {
5325                 /* 570 */
5326                 int i, status;
5327                 for (i = 0; i < 8; i++) {
5328                         status = led_get_status(i);
5329                         if (status < 0)
5330                                 return -EIO;
5331                         seq_printf(m, "%d:\t\t%s\n",
5332                                        i, str_led_status(status));
5333                 }
5334         }
5335
5336         seq_printf(m, "commands:\t"
5337                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5338
5339         return 0;
5340 }
5341
5342 static int led_write(char *buf)
5343 {
5344         char *cmd;
5345         int led, rc;
5346         enum led_status_t s;
5347
5348         if (!led_supported)
5349                 return -ENODEV;
5350
5351         while ((cmd = next_cmd(&buf))) {
5352                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5353                         return -EINVAL;
5354
5355                 if (strstr(cmd, "off")) {
5356                         s = TPACPI_LED_OFF;
5357                 } else if (strstr(cmd, "on")) {
5358                         s = TPACPI_LED_ON;
5359                 } else if (strstr(cmd, "blink")) {
5360                         s = TPACPI_LED_BLINK;
5361                 } else {
5362                         return -EINVAL;
5363                 }
5364
5365                 rc = led_set_status(led, s);
5366                 if (rc < 0)
5367                         return rc;
5368         }
5369
5370         return 0;
5371 }
5372
5373 static struct ibm_struct led_driver_data = {
5374         .name = "led",
5375         .read = led_read,
5376         .write = led_write,
5377         .exit = led_exit,
5378 };
5379
5380 /*************************************************************************
5381  * Beep subdriver
5382  */
5383
5384 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5385
5386 #define TPACPI_BEEP_Q1 0x0001
5387
5388 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5389         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5390         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5391 };
5392
5393 static int __init beep_init(struct ibm_init_struct *iibm)
5394 {
5395         unsigned long quirks;
5396
5397         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5398
5399         TPACPI_ACPIHANDLE_INIT(beep);
5400
5401         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5402                 str_supported(beep_handle != NULL));
5403
5404         quirks = tpacpi_check_quirks(beep_quirk_table,
5405                                      ARRAY_SIZE(beep_quirk_table));
5406
5407         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5408
5409         return (beep_handle)? 0 : 1;
5410 }
5411
5412 static int beep_read(struct seq_file *m)
5413 {
5414         if (!beep_handle)
5415                 seq_printf(m, "status:\t\tnot supported\n");
5416         else {
5417                 seq_printf(m, "status:\t\tsupported\n");
5418                 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
5419         }
5420
5421         return 0;
5422 }
5423
5424 static int beep_write(char *buf)
5425 {
5426         char *cmd;
5427         int beep_cmd;
5428
5429         if (!beep_handle)
5430                 return -ENODEV;
5431
5432         while ((cmd = next_cmd(&buf))) {
5433                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5434                     beep_cmd >= 0 && beep_cmd <= 17) {
5435                         /* beep_cmd set */
5436                 } else
5437                         return -EINVAL;
5438                 if (tp_features.beep_needs_two_args) {
5439                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5440                                         beep_cmd, 0))
5441                                 return -EIO;
5442                 } else {
5443                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5444                                         beep_cmd))
5445                                 return -EIO;
5446                 }
5447         }
5448
5449         return 0;
5450 }
5451
5452 static struct ibm_struct beep_driver_data = {
5453         .name = "beep",
5454         .read = beep_read,
5455         .write = beep_write,
5456 };
5457
5458 /*************************************************************************
5459  * Thermal subdriver
5460  */
5461
5462 enum thermal_access_mode {
5463         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5464         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5465         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5466         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5467         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5468 };
5469
5470 enum { /* TPACPI_THERMAL_TPEC_* */
5471         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5472         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5473         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5474
5475         TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
5476 };
5477
5478
5479 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5480 struct ibm_thermal_sensors_struct {
5481         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5482 };
5483
5484 static enum thermal_access_mode thermal_read_mode;
5485
5486 /* idx is zero-based */
5487 static int thermal_get_sensor(int idx, s32 *value)
5488 {
5489         int t;
5490         s8 tmp;
5491         char tmpi[5];
5492
5493         t = TP_EC_THERMAL_TMP0;
5494
5495         switch (thermal_read_mode) {
5496 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5497         case TPACPI_THERMAL_TPEC_16:
5498                 if (idx >= 8 && idx <= 15) {
5499                         t = TP_EC_THERMAL_TMP8;
5500                         idx -= 8;
5501                 }
5502                 /* fallthrough */
5503 #endif
5504         case TPACPI_THERMAL_TPEC_8:
5505                 if (idx <= 7) {
5506                         if (!acpi_ec_read(t + idx, &tmp))
5507                                 return -EIO;
5508                         *value = tmp * 1000;
5509                         return 0;
5510                 }
5511                 break;
5512
5513         case TPACPI_THERMAL_ACPI_UPDT:
5514                 if (idx <= 7) {
5515                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5516                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5517                                 return -EIO;
5518                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5519                                 return -EIO;
5520                         *value = (t - 2732) * 100;
5521                         return 0;
5522                 }
5523                 break;
5524
5525         case TPACPI_THERMAL_ACPI_TMP07:
5526                 if (idx <= 7) {
5527                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5528                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5529                                 return -EIO;
5530                         if (t > 127 || t < -127)
5531                                 t = TP_EC_THERMAL_TMP_NA;
5532                         *value = t * 1000;
5533                         return 0;
5534                 }
5535                 break;
5536
5537         case TPACPI_THERMAL_NONE:
5538         default:
5539                 return -ENOSYS;
5540         }
5541
5542         return -EINVAL;
5543 }
5544
5545 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5546 {
5547         int res, i;
5548         int n;
5549
5550         n = 8;
5551         i = 0;
5552
5553         if (!s)
5554                 return -EINVAL;
5555
5556         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5557                 n = 16;
5558
5559         for (i = 0 ; i < n; i++) {
5560                 res = thermal_get_sensor(i, &s->temp[i]);
5561                 if (res)
5562                         return res;
5563         }
5564
5565         return n;
5566 }
5567
5568 static void thermal_dump_all_sensors(void)
5569 {
5570         int n, i;
5571         struct ibm_thermal_sensors_struct t;
5572
5573         n = thermal_get_sensors(&t);
5574         if (n <= 0)
5575                 return;
5576
5577         printk(TPACPI_NOTICE
5578                 "temperatures (Celsius):");
5579
5580         for (i = 0; i < n; i++) {
5581                 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
5582                         printk(KERN_CONT " %d", (int)(t.temp[i] / 1000));
5583                 else
5584                         printk(KERN_CONT " N/A");
5585         }
5586
5587         printk(KERN_CONT "\n");
5588 }
5589
5590 /* sysfs temp##_input -------------------------------------------------- */
5591
5592 static ssize_t thermal_temp_input_show(struct device *dev,
5593                            struct device_attribute *attr,
5594                            char *buf)
5595 {
5596         struct sensor_device_attribute *sensor_attr =
5597                                         to_sensor_dev_attr(attr);
5598         int idx = sensor_attr->index;
5599         s32 value;
5600         int res;
5601
5602         res = thermal_get_sensor(idx, &value);
5603         if (res)
5604                 return res;
5605         if (value == TPACPI_THERMAL_SENSOR_NA)
5606                 return -ENXIO;
5607
5608         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5609 }
5610
5611 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5612          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5613                      thermal_temp_input_show, NULL, _idxB)
5614
5615 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5616         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5617         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5618         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5619         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5620         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5621         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5622         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5623         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5624         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5625         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5626         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5627         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5628         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5629         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5630         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5631         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5632 };
5633
5634 #define THERMAL_ATTRS(X) \
5635         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5636
5637 static struct attribute *thermal_temp_input_attr[] = {
5638         THERMAL_ATTRS(8),
5639         THERMAL_ATTRS(9),
5640         THERMAL_ATTRS(10),
5641         THERMAL_ATTRS(11),
5642         THERMAL_ATTRS(12),
5643         THERMAL_ATTRS(13),
5644         THERMAL_ATTRS(14),
5645         THERMAL_ATTRS(15),
5646         THERMAL_ATTRS(0),
5647         THERMAL_ATTRS(1),
5648         THERMAL_ATTRS(2),
5649         THERMAL_ATTRS(3),
5650         THERMAL_ATTRS(4),
5651         THERMAL_ATTRS(5),
5652         THERMAL_ATTRS(6),
5653         THERMAL_ATTRS(7),
5654         NULL
5655 };
5656
5657 static const struct attribute_group thermal_temp_input16_group = {
5658         .attrs = thermal_temp_input_attr
5659 };
5660
5661 static const struct attribute_group thermal_temp_input8_group = {
5662         .attrs = &thermal_temp_input_attr[8]
5663 };
5664
5665 #undef THERMAL_SENSOR_ATTR_TEMP
5666 #undef THERMAL_ATTRS
5667
5668 /* --------------------------------------------------------------------- */
5669
5670 static int __init thermal_init(struct ibm_init_struct *iibm)
5671 {
5672         u8 t, ta1, ta2;
5673         int i;
5674         int acpi_tmp7;
5675         int res;
5676
5677         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5678
5679         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5680
5681         if (thinkpad_id.ec_model) {
5682                 /*
5683                  * Direct EC access mode: sensors at registers
5684                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5685                  * non-implemented, thermal sensors return 0x80 when
5686                  * not available
5687                  */
5688
5689                 ta1 = ta2 = 0;
5690                 for (i = 0; i < 8; i++) {
5691                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5692                                 ta1 |= t;
5693                         } else {
5694                                 ta1 = 0;
5695                                 break;
5696                         }
5697                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5698                                 ta2 |= t;
5699                         } else {
5700                                 ta1 = 0;
5701                                 break;
5702                         }
5703                 }
5704                 if (ta1 == 0) {
5705                         /* This is sheer paranoia, but we handle it anyway */
5706                         if (acpi_tmp7) {
5707                                 printk(TPACPI_ERR
5708                                        "ThinkPad ACPI EC access misbehaving, "
5709                                        "falling back to ACPI TMPx access "
5710                                        "mode\n");
5711                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5712                         } else {
5713                                 printk(TPACPI_ERR
5714                                        "ThinkPad ACPI EC access misbehaving, "
5715                                        "disabling thermal sensors access\n");
5716                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5717                         }
5718                 } else {
5719                         thermal_read_mode =
5720                             (ta2 != 0) ?
5721                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5722                 }
5723         } else if (acpi_tmp7) {
5724                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5725                         /* 600e/x, 770e, 770x */
5726                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5727                 } else {
5728                         /* Standard ACPI TMPx access, max 8 sensors */
5729                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5730                 }
5731         } else {
5732                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5733                 thermal_read_mode = TPACPI_THERMAL_NONE;
5734         }
5735
5736         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5737                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5738                 thermal_read_mode);
5739
5740         switch (thermal_read_mode) {
5741         case TPACPI_THERMAL_TPEC_16:
5742                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5743                                 &thermal_temp_input16_group);
5744                 if (res)
5745                         return res;
5746                 break;
5747         case TPACPI_THERMAL_TPEC_8:
5748         case TPACPI_THERMAL_ACPI_TMP07:
5749         case TPACPI_THERMAL_ACPI_UPDT:
5750                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5751                                 &thermal_temp_input8_group);
5752                 if (res)
5753                         return res;
5754                 break;
5755         case TPACPI_THERMAL_NONE:
5756         default:
5757                 return 1;
5758         }
5759
5760         return 0;
5761 }
5762
5763 static void thermal_exit(void)
5764 {
5765         switch (thermal_read_mode) {
5766         case TPACPI_THERMAL_TPEC_16:
5767                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5768                                    &thermal_temp_input16_group);
5769                 break;
5770         case TPACPI_THERMAL_TPEC_8:
5771         case TPACPI_THERMAL_ACPI_TMP07:
5772         case TPACPI_THERMAL_ACPI_UPDT:
5773                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5774                                    &thermal_temp_input16_group);
5775                 break;
5776         case TPACPI_THERMAL_NONE:
5777         default:
5778                 break;
5779         }
5780 }
5781
5782 static int thermal_read(struct seq_file *m)
5783 {
5784         int n, i;
5785         struct ibm_thermal_sensors_struct t;
5786
5787         n = thermal_get_sensors(&t);
5788         if (unlikely(n < 0))
5789                 return n;
5790
5791         seq_printf(m, "temperatures:\t");
5792
5793         if (n > 0) {
5794                 for (i = 0; i < (n - 1); i++)
5795                         seq_printf(m, "%d ", t.temp[i] / 1000);
5796                 seq_printf(m, "%d\n", t.temp[i] / 1000);
5797         } else
5798                 seq_printf(m, "not supported\n");
5799
5800         return 0;
5801 }
5802
5803 static struct ibm_struct thermal_driver_data = {
5804         .name = "thermal",
5805         .read = thermal_read,
5806         .exit = thermal_exit,
5807 };
5808
5809 /*************************************************************************
5810  * EC Dump subdriver
5811  */
5812
5813 static u8 ecdump_regs[256];
5814
5815 static int ecdump_read(struct seq_file *m)
5816 {
5817         int i, j;
5818         u8 v;
5819
5820         seq_printf(m, "EC      "
5821                        " +00 +01 +02 +03 +04 +05 +06 +07"
5822                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5823         for (i = 0; i < 256; i += 16) {
5824                 seq_printf(m, "EC 0x%02x:", i);
5825                 for (j = 0; j < 16; j++) {
5826                         if (!acpi_ec_read(i + j, &v))
5827                                 break;
5828                         if (v != ecdump_regs[i + j])
5829                                 seq_printf(m, " *%02x", v);
5830                         else
5831                                 seq_printf(m, "  %02x", v);
5832                         ecdump_regs[i + j] = v;
5833                 }
5834                 seq_putc(m, '\n');
5835                 if (j != 16)
5836                         break;
5837         }
5838
5839         /* These are way too dangerous to advertise openly... */
5840 #if 0
5841         seq_printf(m, "commands:\t0x<offset> 0x<value>"
5842                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5843         seq_printf(m, "commands:\t0x<offset> <value>  "
5844                        " (<offset> is 00-ff, <value> is 0-255)\n");
5845 #endif
5846         return 0;
5847 }
5848
5849 static int ecdump_write(char *buf)
5850 {
5851         char *cmd;
5852         int i, v;
5853
5854         while ((cmd = next_cmd(&buf))) {
5855                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5856                         /* i and v set */
5857                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5858                         /* i and v set */
5859                 } else
5860                         return -EINVAL;
5861                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5862                         if (!acpi_ec_write(i, v))
5863                                 return -EIO;
5864                 } else
5865                         return -EINVAL;
5866         }
5867
5868         return 0;
5869 }
5870
5871 static struct ibm_struct ecdump_driver_data = {
5872         .name = "ecdump",
5873         .read = ecdump_read,
5874         .write = ecdump_write,
5875         .flags.experimental = 1,
5876 };
5877
5878 /*************************************************************************
5879  * Backlight/brightness subdriver
5880  */
5881
5882 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5883
5884 /*
5885  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5886  * CMOS NVRAM byte 0x5E, bits 0-3.
5887  *
5888  * EC HBRV (0x31) has the following layout
5889  *   Bit 7: unknown function
5890  *   Bit 6: unknown function
5891  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5892  *   Bit 4: must be set to zero to avoid problems
5893  *   Bit 3-0: backlight brightness level
5894  *
5895  * brightness_get_raw returns status data in the HBRV layout
5896  *
5897  * WARNING: The X61 has been verified to use HBRV for something else, so
5898  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5899  * testing on the very early *60 Lenovo models...
5900  */
5901
5902 enum {
5903         TP_EC_BACKLIGHT = 0x31,
5904
5905         /* TP_EC_BACKLIGHT bitmasks */
5906         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5907         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5908         TP_EC_BACKLIGHT_MAPSW = 0x20,
5909 };
5910
5911 enum tpacpi_brightness_access_mode {
5912         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5913         TPACPI_BRGHT_MODE_EC,           /* EC control */
5914         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5915         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5916         TPACPI_BRGHT_MODE_MAX
5917 };
5918
5919 static struct backlight_device *ibm_backlight_device;
5920
5921 static enum tpacpi_brightness_access_mode brightness_mode =
5922                 TPACPI_BRGHT_MODE_MAX;
5923
5924 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5925
5926 static struct mutex brightness_mutex;
5927
5928 /* NVRAM brightness access,
5929  * call with brightness_mutex held! */
5930 static unsigned int tpacpi_brightness_nvram_get(void)
5931 {
5932         u8 lnvram;
5933
5934         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5935                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5936                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5937         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5938
5939         return lnvram;
5940 }
5941
5942 static void tpacpi_brightness_checkpoint_nvram(void)
5943 {
5944         u8 lec = 0;
5945         u8 b_nvram;
5946
5947         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5948                 return;
5949
5950         vdbg_printk(TPACPI_DBG_BRGHT,
5951                 "trying to checkpoint backlight level to NVRAM...\n");
5952
5953         if (mutex_lock_killable(&brightness_mutex) < 0)
5954                 return;
5955
5956         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5957                 goto unlock;
5958         lec &= TP_EC_BACKLIGHT_LVLMSK;
5959         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5960
5961         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5962                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5963                 /* NVRAM needs update */
5964                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5965                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5966                 b_nvram |= lec;
5967                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5968                 dbg_printk(TPACPI_DBG_BRGHT,
5969                            "updated NVRAM backlight level to %u (0x%02x)\n",
5970                            (unsigned int) lec, (unsigned int) b_nvram);
5971         } else
5972                 vdbg_printk(TPACPI_DBG_BRGHT,
5973                            "NVRAM backlight level already is %u (0x%02x)\n",
5974                            (unsigned int) lec, (unsigned int) b_nvram);
5975
5976 unlock:
5977         mutex_unlock(&brightness_mutex);
5978 }
5979
5980
5981 /* call with brightness_mutex held! */
5982 static int tpacpi_brightness_get_raw(int *status)
5983 {
5984         u8 lec = 0;
5985
5986         switch (brightness_mode) {
5987         case TPACPI_BRGHT_MODE_UCMS_STEP:
5988                 *status = tpacpi_brightness_nvram_get();
5989                 return 0;
5990         case TPACPI_BRGHT_MODE_EC:
5991         case TPACPI_BRGHT_MODE_ECNVRAM:
5992                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5993                         return -EIO;
5994                 *status = lec;
5995                 return 0;
5996         default:
5997                 return -ENXIO;
5998         }
5999 }
6000
6001 /* call with brightness_mutex held! */
6002 /* do NOT call with illegal backlight level value */
6003 static int tpacpi_brightness_set_ec(unsigned int value)
6004 {
6005         u8 lec = 0;
6006
6007         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6008                 return -EIO;
6009
6010         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6011                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
6012                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
6013                 return -EIO;
6014
6015         return 0;
6016 }
6017
6018 /* call with brightness_mutex held! */
6019 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6020 {
6021         int cmos_cmd, inc;
6022         unsigned int current_value, i;
6023
6024         current_value = tpacpi_brightness_nvram_get();
6025
6026         if (value == current_value)
6027                 return 0;
6028
6029         cmos_cmd = (value > current_value) ?
6030                         TP_CMOS_BRIGHTNESS_UP :
6031                         TP_CMOS_BRIGHTNESS_DOWN;
6032         inc = (value > current_value) ? 1 : -1;
6033
6034         for (i = current_value; i != value; i += inc)
6035                 if (issue_thinkpad_cmos_command(cmos_cmd))
6036                         return -EIO;
6037
6038         return 0;
6039 }
6040
6041 /* May return EINTR which can always be mapped to ERESTARTSYS */
6042 static int brightness_set(unsigned int value)
6043 {
6044         int res;
6045
6046         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
6047             value < 0)
6048                 return -EINVAL;
6049
6050         vdbg_printk(TPACPI_DBG_BRGHT,
6051                         "set backlight level to %d\n", value);
6052
6053         res = mutex_lock_killable(&brightness_mutex);
6054         if (res < 0)
6055                 return res;
6056
6057         switch (brightness_mode) {
6058         case TPACPI_BRGHT_MODE_EC:
6059         case TPACPI_BRGHT_MODE_ECNVRAM:
6060                 res = tpacpi_brightness_set_ec(value);
6061                 break;
6062         case TPACPI_BRGHT_MODE_UCMS_STEP:
6063                 res = tpacpi_brightness_set_ucmsstep(value);
6064                 break;
6065         default:
6066                 res = -ENXIO;
6067         }
6068
6069         mutex_unlock(&brightness_mutex);
6070         return res;
6071 }
6072
6073 /* sysfs backlight class ----------------------------------------------- */
6074
6075 static int brightness_update_status(struct backlight_device *bd)
6076 {
6077         unsigned int level =
6078                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
6079                  bd->props.power == FB_BLANK_UNBLANK) ?
6080                                 bd->props.brightness : 0;
6081
6082         dbg_printk(TPACPI_DBG_BRGHT,
6083                         "backlight: attempt to set level to %d\n",
6084                         level);
6085
6086         /* it is the backlight class's job (caller) to handle
6087          * EINTR and other errors properly */
6088         return brightness_set(level);
6089 }
6090
6091 static int brightness_get(struct backlight_device *bd)
6092 {
6093         int status, res;
6094
6095         res = mutex_lock_killable(&brightness_mutex);
6096         if (res < 0)
6097                 return 0;
6098
6099         res = tpacpi_brightness_get_raw(&status);
6100
6101         mutex_unlock(&brightness_mutex);
6102
6103         if (res < 0)
6104                 return 0;
6105
6106         return status & TP_EC_BACKLIGHT_LVLMSK;
6107 }
6108
6109 static void tpacpi_brightness_notify_change(void)
6110 {
6111         backlight_force_update(ibm_backlight_device,
6112                                BACKLIGHT_UPDATE_HOTKEY);
6113 }
6114
6115 static struct backlight_ops ibm_backlight_data = {
6116         .get_brightness = brightness_get,
6117         .update_status  = brightness_update_status,
6118 };
6119
6120 /* --------------------------------------------------------------------- */
6121
6122 /*
6123  * These are only useful for models that have only one possibility
6124  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6125  * these quirks.
6126  */
6127 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
6128 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
6129 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
6130
6131 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6132         /* Models with ATI GPUs known to require ECNVRAM mode */
6133         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
6134
6135         /* Models with ATI GPUs that can use ECNVRAM */
6136         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
6137         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6138         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6139         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6140
6141         /* Models with Intel Extreme Graphics 2 */
6142         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
6143         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6144         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6145
6146         /* Models with Intel GMA900 */
6147         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
6148         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
6149         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
6150 };
6151
6152 static int __init brightness_init(struct ibm_init_struct *iibm)
6153 {
6154         int b;
6155         unsigned long quirks;
6156
6157         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6158
6159         mutex_init(&brightness_mutex);
6160
6161         quirks = tpacpi_check_quirks(brightness_quirk_table,
6162                                 ARRAY_SIZE(brightness_quirk_table));
6163
6164         /*
6165          * We always attempt to detect acpi support, so as to switch
6166          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6167          * going to publish a backlight interface
6168          */
6169         b = tpacpi_check_std_acpi_brightness_support();
6170         if (b > 0) {
6171
6172                 if (acpi_video_backlight_support()) {
6173                         if (brightness_enable > 1) {
6174                                 printk(TPACPI_NOTICE
6175                                        "Standard ACPI backlight interface "
6176                                        "available, not loading native one.\n");
6177                                 return 1;
6178                         } else if (brightness_enable == 1) {
6179                                 printk(TPACPI_NOTICE
6180                                        "Backlight control force enabled, even if standard "
6181                                        "ACPI backlight interface is available\n");
6182                         }
6183                 } else {
6184                         if (brightness_enable > 1) {
6185                                 printk(TPACPI_NOTICE
6186                                        "Standard ACPI backlight interface not "
6187                                        "available, thinkpad_acpi native "
6188                                        "brightness control enabled\n");
6189                         }
6190                 }
6191         }
6192
6193         if (!brightness_enable) {
6194                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6195                            "brightness support disabled by "
6196                            "module parameter\n");
6197                 return 1;
6198         }
6199
6200         if (b > 16) {
6201                 printk(TPACPI_ERR
6202                        "Unsupported brightness interface, "
6203                        "please contact %s\n", TPACPI_MAIL);
6204                 return 1;
6205         }
6206         if (b == 16)
6207                 tp_features.bright_16levels = 1;
6208
6209         /*
6210          * Check for module parameter bogosity, note that we
6211          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6212          * able to detect "unspecified"
6213          */
6214         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6215                 return -EINVAL;
6216
6217         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6218         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6219             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6220                 if (quirks & TPACPI_BRGHT_Q_EC)
6221                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6222                 else
6223                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6224
6225                 dbg_printk(TPACPI_DBG_BRGHT,
6226                            "driver auto-selected brightness_mode=%d\n",
6227                            brightness_mode);
6228         }
6229
6230         /* Safety */
6231         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
6232             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6233              brightness_mode == TPACPI_BRGHT_MODE_EC))
6234                 return -EINVAL;
6235
6236         if (tpacpi_brightness_get_raw(&b) < 0)
6237                 return 1;
6238
6239         if (tp_features.bright_16levels)
6240                 printk(TPACPI_INFO
6241                        "detected a 16-level brightness capable ThinkPad\n");
6242
6243         ibm_backlight_device = backlight_device_register(
6244                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
6245                                         &ibm_backlight_data);
6246         if (IS_ERR(ibm_backlight_device)) {
6247                 int rc = PTR_ERR(ibm_backlight_device);
6248                 ibm_backlight_device = NULL;
6249                 printk(TPACPI_ERR "Could not register backlight device\n");
6250                 return rc;
6251         }
6252         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6253                         "brightness is supported\n");
6254
6255         if (quirks & TPACPI_BRGHT_Q_ASK) {
6256                 printk(TPACPI_NOTICE
6257                         "brightness: will use unverified default: "
6258                         "brightness_mode=%d\n", brightness_mode);
6259                 printk(TPACPI_NOTICE
6260                         "brightness: please report to %s whether it works well "
6261                         "or not on your ThinkPad\n", TPACPI_MAIL);
6262         }
6263
6264         ibm_backlight_device->props.max_brightness =
6265                                 (tp_features.bright_16levels)? 15 : 7;
6266         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6267         backlight_update_status(ibm_backlight_device);
6268
6269         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6270                         "brightness: registering brightness hotkeys "
6271                         "as change notification\n");
6272         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6273                                 | TP_ACPI_HKEY_BRGHTUP_MASK
6274                                 | TP_ACPI_HKEY_BRGHTDWN_MASK);;
6275         return 0;
6276 }
6277
6278 static void brightness_suspend(pm_message_t state)
6279 {
6280         tpacpi_brightness_checkpoint_nvram();
6281 }
6282
6283 static void brightness_shutdown(void)
6284 {
6285         tpacpi_brightness_checkpoint_nvram();
6286 }
6287
6288 static void brightness_exit(void)
6289 {
6290         if (ibm_backlight_device) {
6291                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6292                             "calling backlight_device_unregister()\n");
6293                 backlight_device_unregister(ibm_backlight_device);
6294         }
6295
6296         tpacpi_brightness_checkpoint_nvram();
6297 }
6298
6299 static int brightness_read(struct seq_file *m)
6300 {
6301         int level;
6302
6303         level = brightness_get(NULL);
6304         if (level < 0) {
6305                 seq_printf(m, "level:\t\tunreadable\n");
6306         } else {
6307                 seq_printf(m, "level:\t\t%d\n", level);
6308                 seq_printf(m, "commands:\tup, down\n");
6309                 seq_printf(m, "commands:\tlevel <level>"
6310                                " (<level> is 0-%d)\n",
6311                                (tp_features.bright_16levels) ? 15 : 7);
6312         }
6313
6314         return 0;
6315 }
6316
6317 static int brightness_write(char *buf)
6318 {
6319         int level;
6320         int rc;
6321         char *cmd;
6322         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6323
6324         level = brightness_get(NULL);
6325         if (level < 0)
6326                 return level;
6327
6328         while ((cmd = next_cmd(&buf))) {
6329                 if (strlencmp(cmd, "up") == 0) {
6330                         if (level < max_level)
6331                                 level++;
6332                 } else if (strlencmp(cmd, "down") == 0) {
6333                         if (level > 0)
6334                                 level--;
6335                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6336                            level >= 0 && level <= max_level) {
6337                         /* new level set */
6338                 } else
6339                         return -EINVAL;
6340         }
6341
6342         tpacpi_disclose_usertask("procfs brightness",
6343                         "set level to %d\n", level);
6344
6345         /*
6346          * Now we know what the final level should be, so we try to set it.
6347          * Doing it this way makes the syscall restartable in case of EINTR
6348          */
6349         rc = brightness_set(level);
6350         if (!rc && ibm_backlight_device)
6351                 backlight_force_update(ibm_backlight_device,
6352                                         BACKLIGHT_UPDATE_SYSFS);
6353         return (rc == -EINTR)? -ERESTARTSYS : rc;
6354 }
6355
6356 static struct ibm_struct brightness_driver_data = {
6357         .name = "brightness",
6358         .read = brightness_read,
6359         .write = brightness_write,
6360         .exit = brightness_exit,
6361         .suspend = brightness_suspend,
6362         .shutdown = brightness_shutdown,
6363 };
6364
6365 /*************************************************************************
6366  * Volume subdriver
6367  */
6368
6369 /*
6370  * IBM ThinkPads have a simple volume controller with MUTE gating.
6371  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
6372  *
6373  * Since the *61 series (and probably also the later *60 series), Lenovo
6374  * ThinkPads only implement the MUTE gate.
6375  *
6376  * EC register 0x30
6377  *   Bit 6: MUTE (1 mutes sound)
6378  *   Bit 3-0: Volume
6379  *   Other bits should be zero as far as we know.
6380  *
6381  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
6382  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
6383  * such as bit 7 which is used to detect repeated presses of MUTE,
6384  * and we leave them unchanged.
6385  */
6386
6387 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
6388 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
6389 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
6390
6391 static int alsa_index = SNDRV_DEFAULT_IDX1;
6392 static char *alsa_id = "ThinkPadEC";
6393 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
6394
6395 struct tpacpi_alsa_data {
6396         struct snd_card *card;
6397         struct snd_ctl_elem_id *ctl_mute_id;
6398         struct snd_ctl_elem_id *ctl_vol_id;
6399 };
6400
6401 static struct snd_card *alsa_card;
6402
6403 enum {
6404         TP_EC_AUDIO = 0x30,
6405
6406         /* TP_EC_AUDIO bits */
6407         TP_EC_AUDIO_MUTESW = 6,
6408
6409         /* TP_EC_AUDIO bitmasks */
6410         TP_EC_AUDIO_LVL_MSK = 0x0F,
6411         TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
6412
6413         /* Maximum volume */
6414         TP_EC_VOLUME_MAX = 14,
6415 };
6416
6417 enum tpacpi_volume_access_mode {
6418         TPACPI_VOL_MODE_AUTO = 0,       /* Not implemented yet */
6419         TPACPI_VOL_MODE_EC,             /* Pure EC control */
6420         TPACPI_VOL_MODE_UCMS_STEP,      /* UCMS step-based control: N/A */
6421         TPACPI_VOL_MODE_ECNVRAM,        /* EC control w/ NVRAM store */
6422         TPACPI_VOL_MODE_MAX
6423 };
6424
6425 enum tpacpi_volume_capabilities {
6426         TPACPI_VOL_CAP_AUTO = 0,        /* Use white/blacklist */
6427         TPACPI_VOL_CAP_VOLMUTE,         /* Output vol and mute */
6428         TPACPI_VOL_CAP_MUTEONLY,        /* Output mute only */
6429         TPACPI_VOL_CAP_MAX
6430 };
6431
6432 static enum tpacpi_volume_access_mode volume_mode =
6433         TPACPI_VOL_MODE_MAX;
6434
6435 static enum tpacpi_volume_capabilities volume_capabilities;
6436 static int volume_control_allowed;
6437
6438 /*
6439  * Used to syncronize writers to TP_EC_AUDIO and
6440  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
6441  */
6442 static struct mutex volume_mutex;
6443
6444 static void tpacpi_volume_checkpoint_nvram(void)
6445 {
6446         u8 lec = 0;
6447         u8 b_nvram;
6448         u8 ec_mask;
6449
6450         if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
6451                 return;
6452         if (!volume_control_allowed)
6453                 return;
6454
6455         vdbg_printk(TPACPI_DBG_MIXER,
6456                 "trying to checkpoint mixer state to NVRAM...\n");
6457
6458         if (tp_features.mixer_no_level_control)
6459                 ec_mask = TP_EC_AUDIO_MUTESW_MSK;
6460         else
6461                 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
6462
6463         if (mutex_lock_killable(&volume_mutex) < 0)
6464                 return;
6465
6466         if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
6467                 goto unlock;
6468         lec &= ec_mask;
6469         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
6470
6471         if (lec != (b_nvram & ec_mask)) {
6472                 /* NVRAM needs update */
6473                 b_nvram &= ~ec_mask;
6474                 b_nvram |= lec;
6475                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
6476                 dbg_printk(TPACPI_DBG_MIXER,
6477                            "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
6478                            (unsigned int) lec, (unsigned int) b_nvram);
6479         } else {
6480                 vdbg_printk(TPACPI_DBG_MIXER,
6481                            "NVRAM mixer status already is 0x%02x (0x%02x)\n",
6482                            (unsigned int) lec, (unsigned int) b_nvram);
6483         }
6484
6485 unlock:
6486         mutex_unlock(&volume_mutex);
6487 }
6488
6489 static int volume_get_status_ec(u8 *status)
6490 {
6491         u8 s;
6492
6493         if (!acpi_ec_read(TP_EC_AUDIO, &s))
6494                 return -EIO;
6495
6496         *status = s;
6497
6498         dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
6499
6500         return 0;
6501 }
6502
6503 static int volume_get_status(u8 *status)
6504 {
6505         return volume_get_status_ec(status);
6506 }
6507
6508 static int volume_set_status_ec(const u8 status)
6509 {
6510         if (!acpi_ec_write(TP_EC_AUDIO, status))
6511                 return -EIO;
6512
6513         dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
6514
6515         return 0;
6516 }
6517
6518 static int volume_set_status(const u8 status)
6519 {
6520         return volume_set_status_ec(status);
6521 }
6522
6523 static int volume_set_mute_ec(const bool mute)
6524 {
6525         int rc;
6526         u8 s, n;
6527
6528         if (mutex_lock_killable(&volume_mutex) < 0)
6529                 return -EINTR;
6530
6531         rc = volume_get_status_ec(&s);
6532         if (rc)
6533                 goto unlock;
6534
6535         n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
6536                      s & ~TP_EC_AUDIO_MUTESW_MSK;
6537
6538         if (n != s)
6539                 rc = volume_set_status_ec(n);
6540
6541 unlock:
6542         mutex_unlock(&volume_mutex);
6543         return rc;
6544 }
6545
6546 static int volume_set_mute(const bool mute)
6547 {
6548         dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
6549                    (mute) ? "" : "un");
6550         return volume_set_mute_ec(mute);
6551 }
6552
6553 static int volume_set_volume_ec(const u8 vol)
6554 {
6555         int rc;
6556         u8 s, n;
6557
6558         if (vol > TP_EC_VOLUME_MAX)
6559                 return -EINVAL;
6560
6561         if (mutex_lock_killable(&volume_mutex) < 0)
6562                 return -EINTR;
6563
6564         rc = volume_get_status_ec(&s);
6565         if (rc)
6566                 goto unlock;
6567
6568         n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
6569
6570         if (n != s)
6571                 rc = volume_set_status_ec(n);
6572
6573 unlock:
6574         mutex_unlock(&volume_mutex);
6575         return rc;
6576 }
6577
6578 static int volume_set_volume(const u8 vol)
6579 {
6580         dbg_printk(TPACPI_DBG_MIXER,
6581                    "trying to set volume level to %hu\n", vol);
6582         return volume_set_volume_ec(vol);
6583 }
6584
6585 static void volume_alsa_notify_change(void)
6586 {
6587         struct tpacpi_alsa_data *d;
6588
6589         if (alsa_card && alsa_card->private_data) {
6590                 d = alsa_card->private_data;
6591                 if (d->ctl_mute_id)
6592                         snd_ctl_notify(alsa_card,
6593                                         SNDRV_CTL_EVENT_MASK_VALUE,
6594                                         d->ctl_mute_id);
6595                 if (d->ctl_vol_id)
6596                         snd_ctl_notify(alsa_card,
6597                                         SNDRV_CTL_EVENT_MASK_VALUE,
6598                                         d->ctl_vol_id);
6599         }
6600 }
6601
6602 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
6603                                 struct snd_ctl_elem_info *uinfo)
6604 {
6605         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
6606         uinfo->count = 1;
6607         uinfo->value.integer.min = 0;
6608         uinfo->value.integer.max = TP_EC_VOLUME_MAX;
6609         return 0;
6610 }
6611
6612 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
6613                                 struct snd_ctl_elem_value *ucontrol)
6614 {
6615         u8 s;
6616         int rc;
6617
6618         rc = volume_get_status(&s);
6619         if (rc < 0)
6620                 return rc;
6621
6622         ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
6623         return 0;
6624 }
6625
6626 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
6627                                 struct snd_ctl_elem_value *ucontrol)
6628 {
6629         return volume_set_volume(ucontrol->value.integer.value[0]);
6630 }
6631
6632 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
6633
6634 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
6635                                 struct snd_ctl_elem_value *ucontrol)
6636 {
6637         u8 s;
6638         int rc;
6639
6640         rc = volume_get_status(&s);
6641         if (rc < 0)
6642                 return rc;
6643
6644         ucontrol->value.integer.value[0] =
6645                                 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
6646         return 0;
6647 }
6648
6649 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
6650                                 struct snd_ctl_elem_value *ucontrol)
6651 {
6652         return volume_set_mute(!ucontrol->value.integer.value[0]);
6653 }
6654
6655 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = {
6656         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6657         .name = "Console Playback Volume",
6658         .index = 0,
6659         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6660         .info = volume_alsa_vol_info,
6661         .get = volume_alsa_vol_get,
6662 };
6663
6664 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = {
6665         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
6666         .name = "Console Playback Switch",
6667         .index = 0,
6668         .access = SNDRV_CTL_ELEM_ACCESS_READ,
6669         .info = volume_alsa_mute_info,
6670         .get = volume_alsa_mute_get,
6671 };
6672
6673 static void volume_suspend(pm_message_t state)
6674 {
6675         tpacpi_volume_checkpoint_nvram();
6676 }
6677
6678 static void volume_resume(void)
6679 {
6680         volume_alsa_notify_change();
6681 }
6682
6683 static void volume_shutdown(void)
6684 {
6685         tpacpi_volume_checkpoint_nvram();
6686 }
6687
6688 static void volume_exit(void)
6689 {
6690         if (alsa_card) {
6691                 snd_card_free(alsa_card);
6692                 alsa_card = NULL;
6693         }
6694
6695         tpacpi_volume_checkpoint_nvram();
6696 }
6697
6698 static int __init volume_create_alsa_mixer(void)
6699 {
6700         struct snd_card *card;
6701         struct tpacpi_alsa_data *data;
6702         struct snd_kcontrol *ctl_vol;
6703         struct snd_kcontrol *ctl_mute;
6704         int rc;
6705
6706         rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
6707                             sizeof(struct tpacpi_alsa_data), &card);
6708         if (rc < 0)
6709                 return rc;
6710         if (!card)
6711                 return -ENOMEM;
6712
6713         BUG_ON(!card->private_data);
6714         data = card->private_data;
6715         data->card = card;
6716
6717         strlcpy(card->driver, TPACPI_ALSA_DRVNAME,
6718                 sizeof(card->driver));
6719         strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME,
6720                 sizeof(card->shortname));
6721         snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
6722                  (thinkpad_id.ec_version_str) ?
6723                         thinkpad_id.ec_version_str : "(unknown)");
6724         snprintf(card->longname, sizeof(card->longname),
6725                  "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
6726                  (thinkpad_id.ec_version_str) ?
6727                         thinkpad_id.ec_version_str : "unknown");
6728
6729         if (volume_control_allowed) {
6730                 volume_alsa_control_vol.put = volume_alsa_vol_put;
6731                 volume_alsa_control_vol.access =
6732                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6733
6734                 volume_alsa_control_mute.put = volume_alsa_mute_put;
6735                 volume_alsa_control_mute.access =
6736                                 SNDRV_CTL_ELEM_ACCESS_READWRITE;
6737         }
6738
6739         if (!tp_features.mixer_no_level_control) {
6740                 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
6741                 rc = snd_ctl_add(card, ctl_vol);
6742                 if (rc < 0) {
6743                         printk(TPACPI_ERR
6744                                 "Failed to create ALSA volume control\n");
6745                         goto err_out;
6746                 }
6747                 data->ctl_vol_id = &ctl_vol->id;
6748         }
6749
6750         ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
6751         rc = snd_ctl_add(card, ctl_mute);
6752         if (rc < 0) {
6753                 printk(TPACPI_ERR "Failed to create ALSA mute control\n");
6754                 goto err_out;
6755         }
6756         data->ctl_mute_id = &ctl_mute->id;
6757
6758         snd_card_set_dev(card, &tpacpi_pdev->dev);
6759         rc = snd_card_register(card);
6760
6761 err_out:
6762         if (rc < 0) {
6763                 snd_card_free(card);
6764                 card = NULL;
6765         }
6766
6767         alsa_card = card;
6768         return rc;
6769 }
6770
6771 #define TPACPI_VOL_Q_MUTEONLY   0x0001  /* Mute-only control available */
6772 #define TPACPI_VOL_Q_LEVEL      0x0002  /* Volume control available */
6773
6774 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
6775         /* Whitelist volume level on all IBM by default */
6776         { .vendor = PCI_VENDOR_ID_IBM,
6777           .bios   = TPACPI_MATCH_ANY,
6778           .ec     = TPACPI_MATCH_ANY,
6779           .quirks = TPACPI_VOL_Q_LEVEL },
6780
6781         /* Lenovo models with volume control (needs confirmation) */
6782         TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
6783         TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
6784         TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
6785         TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
6786         TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
6787         TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
6788         TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
6789
6790         /* Whitelist mute-only on all Lenovo by default */
6791         { .vendor = PCI_VENDOR_ID_LENOVO,
6792           .bios   = TPACPI_MATCH_ANY,
6793           .ec     = TPACPI_MATCH_ANY,
6794           .quirks = TPACPI_VOL_Q_MUTEONLY }
6795 };
6796
6797 static int __init volume_init(struct ibm_init_struct *iibm)
6798 {
6799         unsigned long quirks;
6800         int rc;
6801
6802         vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
6803
6804         mutex_init(&volume_mutex);
6805
6806         /*
6807          * Check for module parameter bogosity, note that we
6808          * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
6809          * able to detect "unspecified"
6810          */
6811         if (volume_mode > TPACPI_VOL_MODE_MAX)
6812                 return -EINVAL;
6813
6814         if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
6815                 printk(TPACPI_ERR
6816                         "UCMS step volume mode not implemented, "
6817                         "please contact %s\n", TPACPI_MAIL);
6818                 return 1;
6819         }
6820
6821         if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
6822                 return -EINVAL;
6823
6824         /*
6825          * The ALSA mixer is our primary interface.
6826          * When disabled, don't install the subdriver at all
6827          */
6828         if (!alsa_enable) {
6829                 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6830                             "ALSA mixer disabled by parameter, "
6831                             "not loading volume subdriver...\n");
6832                 return 1;
6833         }
6834
6835         quirks = tpacpi_check_quirks(volume_quirk_table,
6836                                      ARRAY_SIZE(volume_quirk_table));
6837
6838         switch (volume_capabilities) {
6839         case TPACPI_VOL_CAP_AUTO:
6840                 if (quirks & TPACPI_VOL_Q_MUTEONLY)
6841                         tp_features.mixer_no_level_control = 1;
6842                 else if (quirks & TPACPI_VOL_Q_LEVEL)
6843                         tp_features.mixer_no_level_control = 0;
6844                 else
6845                         return 1; /* no mixer */
6846                 break;
6847         case TPACPI_VOL_CAP_VOLMUTE:
6848                 tp_features.mixer_no_level_control = 0;
6849                 break;
6850         case TPACPI_VOL_CAP_MUTEONLY:
6851                 tp_features.mixer_no_level_control = 1;
6852                 break;
6853         default:
6854                 return 1;
6855         }
6856
6857         if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
6858                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6859                                 "using user-supplied volume_capabilities=%d\n",
6860                                 volume_capabilities);
6861
6862         if (volume_mode == TPACPI_VOL_MODE_AUTO ||
6863             volume_mode == TPACPI_VOL_MODE_MAX) {
6864                 volume_mode = TPACPI_VOL_MODE_ECNVRAM;
6865
6866                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6867                                 "driver auto-selected volume_mode=%d\n",
6868                                 volume_mode);
6869         } else {
6870                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6871                                 "using user-supplied volume_mode=%d\n",
6872                                 volume_mode);
6873         }
6874
6875         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6876                         "mute is supported, volume control is %s\n",
6877                         str_supported(!tp_features.mixer_no_level_control));
6878
6879         rc = volume_create_alsa_mixer();
6880         if (rc) {
6881                 printk(TPACPI_ERR
6882                         "Could not create the ALSA mixer interface\n");
6883                 return rc;
6884         }
6885
6886         printk(TPACPI_INFO
6887                 "Console audio control enabled, mode: %s\n",
6888                 (volume_control_allowed) ?
6889                         "override (read/write)" :
6890                         "monitor (read only)");
6891
6892         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
6893                 "registering volume hotkeys as change notification\n");
6894         tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6895                         | TP_ACPI_HKEY_VOLUP_MASK
6896                         | TP_ACPI_HKEY_VOLDWN_MASK
6897                         | TP_ACPI_HKEY_MUTE_MASK);
6898
6899         return 0;
6900 }
6901
6902 static int volume_read(struct seq_file *m)
6903 {
6904         u8 status;
6905
6906         if (volume_get_status(&status) < 0) {
6907                 seq_printf(m, "level:\t\tunreadable\n");
6908         } else {
6909                 if (tp_features.mixer_no_level_control)
6910                         seq_printf(m, "level:\t\tunsupported\n");
6911                 else
6912                         seq_printf(m, "level:\t\t%d\n",
6913                                         status & TP_EC_AUDIO_LVL_MSK);
6914
6915                 seq_printf(m, "mute:\t\t%s\n",
6916                                 onoff(status, TP_EC_AUDIO_MUTESW));
6917
6918                 if (volume_control_allowed) {
6919                         seq_printf(m, "commands:\tunmute, mute\n");
6920                         if (!tp_features.mixer_no_level_control) {
6921                                 seq_printf(m,
6922                                                "commands:\tup, down\n");
6923                                 seq_printf(m,
6924                                                "commands:\tlevel <level>"
6925                                                " (<level> is 0-%d)\n",
6926                                                TP_EC_VOLUME_MAX);
6927                         }
6928                 }
6929         }
6930
6931         return 0;
6932 }
6933
6934 static int volume_write(char *buf)
6935 {
6936         u8 s;
6937         u8 new_level, new_mute;
6938         int l;
6939         char *cmd;
6940         int rc;
6941
6942         /*
6943          * We do allow volume control at driver startup, so that the
6944          * user can set initial state through the volume=... parameter hack.
6945          */
6946         if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
6947                 if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
6948                         tp_warned.volume_ctrl_forbidden = 1;
6949                         printk(TPACPI_NOTICE
6950                                 "Console audio control in monitor mode, "
6951                                 "changes are not allowed.\n");
6952                         printk(TPACPI_NOTICE
6953                                 "Use the volume_control=1 module parameter "
6954                                 "to enable volume control\n");
6955                 }
6956                 return -EPERM;
6957         }
6958
6959         rc = volume_get_status(&s);
6960         if (rc < 0)
6961                 return rc;
6962
6963         new_level = s & TP_EC_AUDIO_LVL_MSK;
6964         new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
6965
6966         while ((cmd = next_cmd(&buf))) {
6967                 if (!tp_features.mixer_no_level_control) {
6968                         if (strlencmp(cmd, "up") == 0) {
6969                                 if (new_mute)
6970                                         new_mute = 0;
6971                                 else if (new_level < TP_EC_VOLUME_MAX)
6972                                         new_level++;
6973                                 continue;
6974                         } else if (strlencmp(cmd, "down") == 0) {
6975                                 if (new_mute)
6976                                         new_mute = 0;
6977                                 else if (new_level > 0)
6978                                         new_level--;
6979                                 continue;
6980                         } else if (sscanf(cmd, "level %u", &l) == 1 &&
6981                                    l >= 0 && l <= TP_EC_VOLUME_MAX) {
6982                                         new_level = l;
6983                                 continue;
6984                         }
6985                 }
6986                 if (strlencmp(cmd, "mute") == 0)
6987                         new_mute = TP_EC_AUDIO_MUTESW_MSK;
6988                 else if (strlencmp(cmd, "unmute") == 0)
6989                         new_mute = 0;
6990                 else
6991                         return -EINVAL;
6992         }
6993
6994         if (tp_features.mixer_no_level_control) {
6995                 tpacpi_disclose_usertask("procfs volume", "%smute\n",
6996                                         new_mute ? "" : "un");
6997                 rc = volume_set_mute(!!new_mute);
6998         } else {
6999                 tpacpi_disclose_usertask("procfs volume",
7000                                         "%smute and set level to %d\n",
7001                                         new_mute ? "" : "un", new_level);
7002                 rc = volume_set_status(new_mute | new_level);
7003         }
7004         volume_alsa_notify_change();
7005
7006         return (rc == -EINTR) ? -ERESTARTSYS : rc;
7007 }
7008
7009 static struct ibm_struct volume_driver_data = {
7010         .name = "volume",
7011         .read = volume_read,
7012         .write = volume_write,
7013         .exit = volume_exit,
7014         .suspend = volume_suspend,
7015         .resume = volume_resume,
7016         .shutdown = volume_shutdown,
7017 };
7018
7019 /*************************************************************************
7020  * Fan subdriver
7021  */
7022
7023 /*
7024  * FAN ACCESS MODES
7025  *
7026  * TPACPI_FAN_RD_ACPI_GFAN:
7027  *      ACPI GFAN method: returns fan level
7028  *
7029  *      see TPACPI_FAN_WR_ACPI_SFAN
7030  *      EC 0x2f (HFSP) not available if GFAN exists
7031  *
7032  * TPACPI_FAN_WR_ACPI_SFAN:
7033  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7034  *
7035  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
7036  *      it for writing.
7037  *
7038  * TPACPI_FAN_WR_TPEC:
7039  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
7040  *      Supported on almost all ThinkPads
7041  *
7042  *      Fan speed changes of any sort (including those caused by the
7043  *      disengaged mode) are usually done slowly by the firmware as the
7044  *      maximum ammount of fan duty cycle change per second seems to be
7045  *      limited.
7046  *
7047  *      Reading is not available if GFAN exists.
7048  *      Writing is not available if SFAN exists.
7049  *
7050  *      Bits
7051  *       7      automatic mode engaged;
7052  *              (default operation mode of the ThinkPad)
7053  *              fan level is ignored in this mode.
7054  *       6      full speed mode (takes precedence over bit 7);
7055  *              not available on all thinkpads.  May disable
7056  *              the tachometer while the fan controller ramps up
7057  *              the speed (which can take up to a few *minutes*).
7058  *              Speeds up fan to 100% duty-cycle, which is far above
7059  *              the standard RPM levels.  It is not impossible that
7060  *              it could cause hardware damage.
7061  *      5-3     unused in some models.  Extra bits for fan level
7062  *              in others, but still useless as all values above
7063  *              7 map to the same speed as level 7 in these models.
7064  *      2-0     fan level (0..7 usually)
7065  *                      0x00 = stop
7066  *                      0x07 = max (set when temperatures critical)
7067  *              Some ThinkPads may have other levels, see
7068  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7069  *
7070  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7071  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
7072  *      does so, its initial value is meaningless (0x07).
7073  *
7074  *      For firmware bugs, refer to:
7075  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7076  *
7077  *      ----
7078  *
7079  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7080  *      Main fan tachometer reading (in RPM)
7081  *
7082  *      This register is present on all ThinkPads with a new-style EC, and
7083  *      it is known not to be present on the A21m/e, and T22, as there is
7084  *      something else in offset 0x84 according to the ACPI DSDT.  Other
7085  *      ThinkPads from this same time period (and earlier) probably lack the
7086  *      tachometer as well.
7087  *
7088  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7089  *      was never fixed by IBM to report the EC firmware version string
7090  *      probably support the tachometer (like the early X models), so
7091  *      detecting it is quite hard.  We need more data to know for sure.
7092  *
7093  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7094  *      might result.
7095  *
7096  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
7097  *      mode.
7098  *
7099  *      For firmware bugs, refer to:
7100  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7101  *
7102  *      ----
7103  *
7104  *      ThinkPad EC register 0x31 bit 0 (only on select models)
7105  *
7106  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
7107  *      show the speed of the main fan.  When bit 0 of EC register 0x31
7108  *      is one, the tachometer registers show the speed of the auxiliary
7109  *      fan.
7110  *
7111  *      Fan control seems to affect both fans, regardless of the state
7112  *      of this bit.
7113  *
7114  *      So far, only the firmware for the X60/X61 non-tablet versions
7115  *      seem to support this (firmware TP-7M).
7116  *
7117  * TPACPI_FAN_WR_ACPI_FANS:
7118  *      ThinkPad X31, X40, X41.  Not available in the X60.
7119  *
7120  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
7121  *      high speed.  ACPI DSDT seems to map these three speeds to levels
7122  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7123  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7124  *
7125  *      The speeds are stored on handles
7126  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
7127  *
7128  *      There are three default speed sets, accessible as handles:
7129  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7130  *
7131  *      ACPI DSDT switches which set is in use depending on various
7132  *      factors.
7133  *
7134  *      TPACPI_FAN_WR_TPEC is also available and should be used to
7135  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7136  *      but the ACPI tables just mention level 7.
7137  */
7138
7139 enum {                                  /* Fan control constants */
7140         fan_status_offset = 0x2f,       /* EC register 0x2f */
7141         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
7142                                          * 0x84 must be read before 0x85 */
7143         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
7144                                            bit 0 selects which fan is active */
7145
7146         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
7147         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
7148
7149         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
7150 };
7151
7152 enum fan_status_access_mode {
7153         TPACPI_FAN_NONE = 0,            /* No fan status or control */
7154         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
7155         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
7156 };
7157
7158 enum fan_control_access_mode {
7159         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
7160         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
7161         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
7162         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
7163 };
7164
7165 enum fan_control_commands {
7166         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
7167         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
7168         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
7169                                                  * and also watchdog cmd */
7170 };
7171
7172 static int fan_control_allowed;
7173
7174 static enum fan_status_access_mode fan_status_access_mode;
7175 static enum fan_control_access_mode fan_control_access_mode;
7176 static enum fan_control_commands fan_control_commands;
7177
7178 static u8 fan_control_initial_status;
7179 static u8 fan_control_desired_level;
7180 static u8 fan_control_resume_level;
7181 static int fan_watchdog_maxinterval;
7182
7183 static struct mutex fan_mutex;
7184
7185 static void fan_watchdog_fire(struct work_struct *ignored);
7186 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
7187
7188 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
7189 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
7190            "\\FSPD",            /* 600e/x, 770e, 770x */
7191            );                   /* all others */
7192 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
7193            "JFNS",              /* 770x-JL */
7194            );                   /* all others */
7195
7196 /*
7197  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
7198  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
7199  * be in auto mode (0x80).
7200  *
7201  * This is corrected by any write to HFSP either by the driver, or
7202  * by the firmware.
7203  *
7204  * We assume 0x07 really means auto mode while this quirk is active,
7205  * as this is far more likely than the ThinkPad being in level 7,
7206  * which is only used by the firmware during thermal emergencies.
7207  *
7208  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
7209  * TP-70 (T43, R52), which are known to be buggy.
7210  */
7211
7212 static void fan_quirk1_setup(void)
7213 {
7214         if (fan_control_initial_status == 0x07) {
7215                 printk(TPACPI_NOTICE
7216                        "fan_init: initial fan status is unknown, "
7217                        "assuming it is in auto mode\n");
7218                 tp_features.fan_ctrl_status_undef = 1;
7219         }
7220 }
7221
7222 static void fan_quirk1_handle(u8 *fan_status)
7223 {
7224         if (unlikely(tp_features.fan_ctrl_status_undef)) {
7225                 if (*fan_status != fan_control_initial_status) {
7226                         /* something changed the HFSP regisnter since
7227                          * driver init time, so it is not undefined
7228                          * anymore */
7229                         tp_features.fan_ctrl_status_undef = 0;
7230                 } else {
7231                         /* Return most likely status. In fact, it
7232                          * might be the only possible status */
7233                         *fan_status = TP_EC_FAN_AUTO;
7234                 }
7235         }
7236 }
7237
7238 /* Select main fan on X60/X61, NOOP on others */
7239 static bool fan_select_fan1(void)
7240 {
7241         if (tp_features.second_fan) {
7242                 u8 val;
7243
7244                 if (ec_read(fan_select_offset, &val) < 0)
7245                         return false;
7246                 val &= 0xFEU;
7247                 if (ec_write(fan_select_offset, val) < 0)
7248                         return false;
7249         }
7250         return true;
7251 }
7252
7253 /* Select secondary fan on X60/X61 */
7254 static bool fan_select_fan2(void)
7255 {
7256         u8 val;
7257
7258         if (!tp_features.second_fan)
7259                 return false;
7260
7261         if (ec_read(fan_select_offset, &val) < 0)
7262                 return false;
7263         val |= 0x01U;
7264         if (ec_write(fan_select_offset, val) < 0)
7265                 return false;
7266
7267         return true;
7268 }
7269
7270 /*
7271  * Call with fan_mutex held
7272  */
7273 static void fan_update_desired_level(u8 status)
7274 {
7275         if ((status &
7276              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7277                 if (status > 7)
7278                         fan_control_desired_level = 7;
7279                 else
7280                         fan_control_desired_level = status;
7281         }
7282 }
7283
7284 static int fan_get_status(u8 *status)
7285 {
7286         u8 s;
7287
7288         /* TODO:
7289          * Add TPACPI_FAN_RD_ACPI_FANS ? */
7290
7291         switch (fan_status_access_mode) {
7292         case TPACPI_FAN_RD_ACPI_GFAN:
7293                 /* 570, 600e/x, 770e, 770x */
7294
7295                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
7296                         return -EIO;
7297
7298                 if (likely(status))
7299                         *status = s & 0x07;
7300
7301                 break;
7302
7303         case TPACPI_FAN_RD_TPEC:
7304                 /* all except 570, 600e/x, 770e, 770x */
7305                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
7306                         return -EIO;
7307
7308                 if (likely(status)) {
7309                         *status = s;
7310                         fan_quirk1_handle(status);
7311                 }
7312
7313                 break;
7314
7315         default:
7316                 return -ENXIO;
7317         }
7318
7319         return 0;
7320 }
7321
7322 static int fan_get_status_safe(u8 *status)
7323 {
7324         int rc;
7325         u8 s;
7326
7327         if (mutex_lock_killable(&fan_mutex))
7328                 return -ERESTARTSYS;
7329         rc = fan_get_status(&s);
7330         if (!rc)
7331                 fan_update_desired_level(s);
7332         mutex_unlock(&fan_mutex);
7333
7334         if (status)
7335                 *status = s;
7336
7337         return rc;
7338 }
7339
7340 static int fan_get_speed(unsigned int *speed)
7341 {
7342         u8 hi, lo;
7343
7344         switch (fan_status_access_mode) {
7345         case TPACPI_FAN_RD_TPEC:
7346                 /* all except 570, 600e/x, 770e, 770x */
7347                 if (unlikely(!fan_select_fan1()))
7348                         return -EIO;
7349                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
7350                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
7351                         return -EIO;
7352
7353                 if (likely(speed))
7354                         *speed = (hi << 8) | lo;
7355
7356                 break;
7357
7358         default:
7359                 return -ENXIO;
7360         }
7361
7362         return 0;
7363 }
7364
7365 static int fan2_get_speed(unsigned int *speed)
7366 {
7367         u8 hi, lo;
7368         bool rc;
7369
7370         switch (fan_status_access_mode) {
7371         case TPACPI_FAN_RD_TPEC:
7372                 /* all except 570, 600e/x, 770e, 770x */
7373                 if (unlikely(!fan_select_fan2()))
7374                         return -EIO;
7375                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
7376                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
7377                 fan_select_fan1(); /* play it safe */
7378                 if (rc)
7379                         return -EIO;
7380
7381                 if (likely(speed))
7382                         *speed = (hi << 8) | lo;
7383
7384                 break;
7385
7386         default:
7387                 return -ENXIO;
7388         }
7389
7390         return 0;
7391 }
7392
7393 static int fan_set_level(int level)
7394 {
7395         if (!fan_control_allowed)
7396                 return -EPERM;
7397
7398         switch (fan_control_access_mode) {
7399         case TPACPI_FAN_WR_ACPI_SFAN:
7400                 if (level >= 0 && level <= 7) {
7401                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
7402                                 return -EIO;
7403                 } else
7404                         return -EINVAL;
7405                 break;
7406
7407         case TPACPI_FAN_WR_ACPI_FANS:
7408         case TPACPI_FAN_WR_TPEC:
7409                 if (!(level & TP_EC_FAN_AUTO) &&
7410                     !(level & TP_EC_FAN_FULLSPEED) &&
7411                     ((level < 0) || (level > 7)))
7412                         return -EINVAL;
7413
7414                 /* safety net should the EC not support AUTO
7415                  * or FULLSPEED mode bits and just ignore them */
7416                 if (level & TP_EC_FAN_FULLSPEED)
7417                         level |= 7;     /* safety min speed 7 */
7418                 else if (level & TP_EC_FAN_AUTO)
7419                         level |= 4;     /* safety min speed 4 */
7420
7421                 if (!acpi_ec_write(fan_status_offset, level))
7422                         return -EIO;
7423                 else
7424                         tp_features.fan_ctrl_status_undef = 0;
7425                 break;
7426
7427         default:
7428                 return -ENXIO;
7429         }
7430
7431         vdbg_printk(TPACPI_DBG_FAN,
7432                 "fan control: set fan control register to 0x%02x\n", level);
7433         return 0;
7434 }
7435
7436 static int fan_set_level_safe(int level)
7437 {
7438         int rc;
7439
7440         if (!fan_control_allowed)
7441                 return -EPERM;
7442
7443         if (mutex_lock_killable(&fan_mutex))
7444                 return -ERESTARTSYS;
7445
7446         if (level == TPACPI_FAN_LAST_LEVEL)
7447                 level = fan_control_desired_level;
7448
7449         rc = fan_set_level(level);
7450         if (!rc)
7451                 fan_update_desired_level(level);
7452
7453         mutex_unlock(&fan_mutex);
7454         return rc;
7455 }
7456
7457 static int fan_set_enable(void)
7458 {
7459         u8 s;
7460         int rc;
7461
7462         if (!fan_control_allowed)
7463                 return -EPERM;
7464
7465         if (mutex_lock_killable(&fan_mutex))
7466                 return -ERESTARTSYS;
7467
7468         switch (fan_control_access_mode) {
7469         case TPACPI_FAN_WR_ACPI_FANS:
7470         case TPACPI_FAN_WR_TPEC:
7471                 rc = fan_get_status(&s);
7472                 if (rc < 0)
7473                         break;
7474
7475                 /* Don't go out of emergency fan mode */
7476                 if (s != 7) {
7477                         s &= 0x07;
7478                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
7479                 }
7480
7481                 if (!acpi_ec_write(fan_status_offset, s))
7482                         rc = -EIO;
7483                 else {
7484                         tp_features.fan_ctrl_status_undef = 0;
7485                         rc = 0;
7486                 }
7487                 break;
7488
7489         case TPACPI_FAN_WR_ACPI_SFAN:
7490                 rc = fan_get_status(&s);
7491                 if (rc < 0)
7492                         break;
7493
7494                 s &= 0x07;
7495
7496                 /* Set fan to at least level 4 */
7497                 s |= 4;
7498
7499                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
7500                         rc = -EIO;
7501                 else
7502                         rc = 0;
7503                 break;
7504
7505         default:
7506                 rc = -ENXIO;
7507         }
7508
7509         mutex_unlock(&fan_mutex);
7510
7511         if (!rc)
7512                 vdbg_printk(TPACPI_DBG_FAN,
7513                         "fan control: set fan control register to 0x%02x\n",
7514                         s);
7515         return rc;
7516 }
7517
7518 static int fan_set_disable(void)
7519 {
7520         int rc;
7521
7522         if (!fan_control_allowed)
7523                 return -EPERM;
7524
7525         if (mutex_lock_killable(&fan_mutex))
7526                 return -ERESTARTSYS;
7527
7528         rc = 0;
7529         switch (fan_control_access_mode) {
7530         case TPACPI_FAN_WR_ACPI_FANS:
7531         case TPACPI_FAN_WR_TPEC:
7532                 if (!acpi_ec_write(fan_status_offset, 0x00))
7533                         rc = -EIO;
7534                 else {
7535                         fan_control_desired_level = 0;
7536                         tp_features.fan_ctrl_status_undef = 0;
7537                 }
7538                 break;
7539
7540         case TPACPI_FAN_WR_ACPI_SFAN:
7541                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
7542                         rc = -EIO;
7543                 else
7544                         fan_control_desired_level = 0;
7545                 break;
7546
7547         default:
7548                 rc = -ENXIO;
7549         }
7550
7551         if (!rc)
7552                 vdbg_printk(TPACPI_DBG_FAN,
7553                         "fan control: set fan control register to 0\n");
7554
7555         mutex_unlock(&fan_mutex);
7556         return rc;
7557 }
7558
7559 static int fan_set_speed(int speed)
7560 {
7561         int rc;
7562
7563         if (!fan_control_allowed)
7564                 return -EPERM;
7565
7566         if (mutex_lock_killable(&fan_mutex))
7567                 return -ERESTARTSYS;
7568
7569         rc = 0;
7570         switch (fan_control_access_mode) {
7571         case TPACPI_FAN_WR_ACPI_FANS:
7572                 if (speed >= 0 && speed <= 65535) {
7573                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
7574                                         speed, speed, speed))
7575                                 rc = -EIO;
7576                 } else
7577                         rc = -EINVAL;
7578                 break;
7579
7580         default:
7581                 rc = -ENXIO;
7582         }
7583
7584         mutex_unlock(&fan_mutex);
7585         return rc;
7586 }
7587
7588 static void fan_watchdog_reset(void)
7589 {
7590         static int fan_watchdog_active;
7591
7592         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
7593                 return;
7594
7595         if (fan_watchdog_active)
7596                 cancel_delayed_work(&fan_watchdog_task);
7597
7598         if (fan_watchdog_maxinterval > 0 &&
7599             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
7600                 fan_watchdog_active = 1;
7601                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
7602                                 msecs_to_jiffies(fan_watchdog_maxinterval
7603                                                  * 1000))) {
7604                         printk(TPACPI_ERR
7605                                "failed to queue the fan watchdog, "
7606                                "watchdog will not trigger\n");
7607                 }
7608         } else
7609                 fan_watchdog_active = 0;
7610 }
7611
7612 static void fan_watchdog_fire(struct work_struct *ignored)
7613 {
7614         int rc;
7615
7616         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
7617                 return;
7618
7619         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
7620         rc = fan_set_enable();
7621         if (rc < 0) {
7622                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
7623                         "will try again later...\n", -rc);
7624                 /* reschedule for later */
7625                 fan_watchdog_reset();
7626         }
7627 }
7628
7629 /*
7630  * SYSFS fan layout: hwmon compatible (device)
7631  *
7632  * pwm*_enable:
7633  *      0: "disengaged" mode
7634  *      1: manual mode
7635  *      2: native EC "auto" mode (recommended, hardware default)
7636  *
7637  * pwm*: set speed in manual mode, ignored otherwise.
7638  *      0 is level 0; 255 is level 7. Intermediate points done with linear
7639  *      interpolation.
7640  *
7641  * fan*_input: tachometer reading, RPM
7642  *
7643  *
7644  * SYSFS fan layout: extensions
7645  *
7646  * fan_watchdog (driver):
7647  *      fan watchdog interval in seconds, 0 disables (default), max 120
7648  */
7649
7650 /* sysfs fan pwm1_enable ----------------------------------------------- */
7651 static ssize_t fan_pwm1_enable_show(struct device *dev,
7652                                     struct device_attribute *attr,
7653                                     char *buf)
7654 {
7655         int res, mode;
7656         u8 status;
7657
7658         res = fan_get_status_safe(&status);
7659         if (res)
7660                 return res;
7661
7662         if (status & TP_EC_FAN_FULLSPEED) {
7663                 mode = 0;
7664         } else if (status & TP_EC_FAN_AUTO) {
7665                 mode = 2;
7666         } else
7667                 mode = 1;
7668
7669         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
7670 }
7671
7672 static ssize_t fan_pwm1_enable_store(struct device *dev,
7673                                      struct device_attribute *attr,
7674                                      const char *buf, size_t count)
7675 {
7676         unsigned long t;
7677         int res, level;
7678
7679         if (parse_strtoul(buf, 2, &t))
7680                 return -EINVAL;
7681
7682         tpacpi_disclose_usertask("hwmon pwm1_enable",
7683                         "set fan mode to %lu\n", t);
7684
7685         switch (t) {
7686         case 0:
7687                 level = TP_EC_FAN_FULLSPEED;
7688                 break;
7689         case 1:
7690                 level = TPACPI_FAN_LAST_LEVEL;
7691                 break;
7692         case 2:
7693                 level = TP_EC_FAN_AUTO;
7694                 break;
7695         case 3:
7696                 /* reserved for software-controlled auto mode */
7697                 return -ENOSYS;
7698         default:
7699                 return -EINVAL;
7700         }
7701
7702         res = fan_set_level_safe(level);
7703         if (res == -ENXIO)
7704                 return -EINVAL;
7705         else if (res < 0)
7706                 return res;
7707
7708         fan_watchdog_reset();
7709
7710         return count;
7711 }
7712
7713 static struct device_attribute dev_attr_fan_pwm1_enable =
7714         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
7715                 fan_pwm1_enable_show, fan_pwm1_enable_store);
7716
7717 /* sysfs fan pwm1 ------------------------------------------------------ */
7718 static ssize_t fan_pwm1_show(struct device *dev,
7719                              struct device_attribute *attr,
7720                              char *buf)
7721 {
7722         int res;
7723         u8 status;
7724
7725         res = fan_get_status_safe(&status);
7726         if (res)
7727                 return res;
7728
7729         if ((status &
7730              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
7731                 status = fan_control_desired_level;
7732
7733         if (status > 7)
7734                 status = 7;
7735
7736         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
7737 }
7738
7739 static ssize_t fan_pwm1_store(struct device *dev,
7740                               struct device_attribute *attr,
7741                               const char *buf, size_t count)
7742 {
7743         unsigned long s;
7744         int rc;
7745         u8 status, newlevel;
7746
7747         if (parse_strtoul(buf, 255, &s))
7748                 return -EINVAL;
7749
7750         tpacpi_disclose_usertask("hwmon pwm1",
7751                         "set fan speed to %lu\n", s);
7752
7753         /* scale down from 0-255 to 0-7 */
7754         newlevel = (s >> 5) & 0x07;
7755
7756         if (mutex_lock_killable(&fan_mutex))
7757                 return -ERESTARTSYS;
7758
7759         rc = fan_get_status(&status);
7760         if (!rc && (status &
7761                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
7762                 rc = fan_set_level(newlevel);
7763                 if (rc == -ENXIO)
7764                         rc = -EINVAL;
7765                 else if (!rc) {
7766                         fan_update_desired_level(newlevel);
7767                         fan_watchdog_reset();
7768                 }
7769         }
7770
7771         mutex_unlock(&fan_mutex);
7772         return (rc)? rc : count;
7773 }
7774
7775 static struct device_attribute dev_attr_fan_pwm1 =
7776         __ATTR(pwm1, S_IWUSR | S_IRUGO,
7777                 fan_pwm1_show, fan_pwm1_store);
7778
7779 /* sysfs fan fan1_input ------------------------------------------------ */
7780 static ssize_t fan_fan1_input_show(struct device *dev,
7781                            struct device_attribute *attr,
7782                            char *buf)
7783 {
7784         int res;
7785         unsigned int speed;
7786
7787         res = fan_get_speed(&speed);
7788         if (res < 0)
7789                 return res;
7790
7791         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7792 }
7793
7794 static struct device_attribute dev_attr_fan_fan1_input =
7795         __ATTR(fan1_input, S_IRUGO,
7796                 fan_fan1_input_show, NULL);
7797
7798 /* sysfs fan fan2_input ------------------------------------------------ */
7799 static ssize_t fan_fan2_input_show(struct device *dev,
7800                            struct device_attribute *attr,
7801                            char *buf)
7802 {
7803         int res;
7804         unsigned int speed;
7805
7806         res = fan2_get_speed(&speed);
7807         if (res < 0)
7808                 return res;
7809
7810         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7811 }
7812
7813 static struct device_attribute dev_attr_fan_fan2_input =
7814         __ATTR(fan2_input, S_IRUGO,
7815                 fan_fan2_input_show, NULL);
7816
7817 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7818 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7819                                      char *buf)
7820 {
7821         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7822 }
7823
7824 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7825                                       const char *buf, size_t count)
7826 {
7827         unsigned long t;
7828
7829         if (parse_strtoul(buf, 120, &t))
7830                 return -EINVAL;
7831
7832         if (!fan_control_allowed)
7833                 return -EPERM;
7834
7835         fan_watchdog_maxinterval = t;
7836         fan_watchdog_reset();
7837
7838         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7839
7840         return count;
7841 }
7842
7843 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7844                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7845
7846 /* --------------------------------------------------------------------- */
7847 static struct attribute *fan_attributes[] = {
7848         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7849         &dev_attr_fan_fan1_input.attr,
7850         NULL, /* for fan2_input */
7851         NULL
7852 };
7853
7854 static const struct attribute_group fan_attr_group = {
7855         .attrs = fan_attributes,
7856 };
7857
7858 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7859 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7860
7861 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7862         { .vendor = PCI_VENDOR_ID_IBM,          \
7863           .bios = TPACPI_MATCH_ANY,             \
7864           .ec = TPID(__id1, __id2),             \
7865           .quirks = __quirks }
7866
7867 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7868         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7869           .bios = TPACPI_MATCH_ANY,             \
7870           .ec = TPID(__id1, __id2),             \
7871           .quirks = __quirks }
7872
7873 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7874         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7875         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7876         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7877         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7878         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7879 };
7880
7881 #undef TPACPI_FAN_QL
7882 #undef TPACPI_FAN_QI
7883
7884 static int __init fan_init(struct ibm_init_struct *iibm)
7885 {
7886         int rc;
7887         unsigned long quirks;
7888
7889         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7890                         "initializing fan subdriver\n");
7891
7892         mutex_init(&fan_mutex);
7893         fan_status_access_mode = TPACPI_FAN_NONE;
7894         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7895         fan_control_commands = 0;
7896         fan_watchdog_maxinterval = 0;
7897         tp_features.fan_ctrl_status_undef = 0;
7898         tp_features.second_fan = 0;
7899         fan_control_desired_level = 7;
7900
7901         TPACPI_ACPIHANDLE_INIT(fans);
7902         TPACPI_ACPIHANDLE_INIT(gfan);
7903         TPACPI_ACPIHANDLE_INIT(sfan);
7904
7905         quirks = tpacpi_check_quirks(fan_quirk_table,
7906                                      ARRAY_SIZE(fan_quirk_table));
7907
7908         if (gfan_handle) {
7909                 /* 570, 600e/x, 770e, 770x */
7910                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7911         } else {
7912                 /* all other ThinkPads: note that even old-style
7913                  * ThinkPad ECs supports the fan control register */
7914                 if (likely(acpi_ec_read(fan_status_offset,
7915                                         &fan_control_initial_status))) {
7916                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7917                         if (quirks & TPACPI_FAN_Q1)
7918                                 fan_quirk1_setup();
7919                         if (quirks & TPACPI_FAN_2FAN) {
7920                                 tp_features.second_fan = 1;
7921                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7922                                         "secondary fan support enabled\n");
7923                         }
7924                 } else {
7925                         printk(TPACPI_ERR
7926                                "ThinkPad ACPI EC access misbehaving, "
7927                                "fan status and control unavailable\n");
7928                         return 1;
7929                 }
7930         }
7931
7932         if (sfan_handle) {
7933                 /* 570, 770x-JL */
7934                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7935                 fan_control_commands |=
7936                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7937         } else {
7938                 if (!gfan_handle) {
7939                         /* gfan without sfan means no fan control */
7940                         /* all other models implement TP EC 0x2f control */
7941
7942                         if (fans_handle) {
7943                                 /* X31, X40, X41 */
7944                                 fan_control_access_mode =
7945                                     TPACPI_FAN_WR_ACPI_FANS;
7946                                 fan_control_commands |=
7947                                     TPACPI_FAN_CMD_SPEED |
7948                                     TPACPI_FAN_CMD_LEVEL |
7949                                     TPACPI_FAN_CMD_ENABLE;
7950                         } else {
7951                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7952                                 fan_control_commands |=
7953                                     TPACPI_FAN_CMD_LEVEL |
7954                                     TPACPI_FAN_CMD_ENABLE;
7955                         }
7956                 }
7957         }
7958
7959         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7960                 "fan is %s, modes %d, %d\n",
7961                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7962                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7963                 fan_status_access_mode, fan_control_access_mode);
7964
7965         /* fan control master switch */
7966         if (!fan_control_allowed) {
7967                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7968                 fan_control_commands = 0;
7969                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7970                            "fan control features disabled by parameter\n");
7971         }
7972
7973         /* update fan_control_desired_level */
7974         if (fan_status_access_mode != TPACPI_FAN_NONE)
7975                 fan_get_status_safe(NULL);
7976
7977         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7978             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7979                 if (tp_features.second_fan) {
7980                         /* attach second fan tachometer */
7981                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7982                                         &dev_attr_fan_fan2_input.attr;
7983                 }
7984                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7985                                          &fan_attr_group);
7986                 if (rc < 0)
7987                         return rc;
7988
7989                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7990                                         &driver_attr_fan_watchdog);
7991                 if (rc < 0) {
7992                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7993                                         &fan_attr_group);
7994                         return rc;
7995                 }
7996                 return 0;
7997         } else
7998                 return 1;
7999 }
8000
8001 static void fan_exit(void)
8002 {
8003         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8004                     "cancelling any pending fan watchdog tasks\n");
8005
8006         /* FIXME: can we really do this unconditionally? */
8007         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
8008         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
8009                            &driver_attr_fan_watchdog);
8010
8011         cancel_delayed_work(&fan_watchdog_task);
8012         flush_workqueue(tpacpi_wq);
8013 }
8014
8015 static void fan_suspend(pm_message_t state)
8016 {
8017         int rc;
8018
8019         if (!fan_control_allowed)
8020                 return;
8021
8022         /* Store fan status in cache */
8023         fan_control_resume_level = 0;
8024         rc = fan_get_status_safe(&fan_control_resume_level);
8025         if (rc < 0)
8026                 printk(TPACPI_NOTICE
8027                         "failed to read fan level for later "
8028                         "restore during resume: %d\n", rc);
8029
8030         /* if it is undefined, don't attempt to restore it.
8031          * KEEP THIS LAST */
8032         if (tp_features.fan_ctrl_status_undef)
8033                 fan_control_resume_level = 0;
8034 }
8035
8036 static void fan_resume(void)
8037 {
8038         u8 current_level = 7;
8039         bool do_set = false;
8040         int rc;
8041
8042         /* DSDT *always* updates status on resume */
8043         tp_features.fan_ctrl_status_undef = 0;
8044
8045         if (!fan_control_allowed ||
8046             !fan_control_resume_level ||
8047             (fan_get_status_safe(&current_level) < 0))
8048                 return;
8049
8050         switch (fan_control_access_mode) {
8051         case TPACPI_FAN_WR_ACPI_SFAN:
8052                 /* never decrease fan level */
8053                 do_set = (fan_control_resume_level > current_level);
8054                 break;
8055         case TPACPI_FAN_WR_ACPI_FANS:
8056         case TPACPI_FAN_WR_TPEC:
8057                 /* never decrease fan level, scale is:
8058                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8059                  *
8060                  * We expect the firmware to set either 7 or AUTO, but we
8061                  * handle FULLSPEED out of paranoia.
8062                  *
8063                  * So, we can safely only restore FULLSPEED or 7, anything
8064                  * else could slow the fan.  Restoring AUTO is useless, at
8065                  * best that's exactly what the DSDT already set (it is the
8066                  * slower it uses).
8067                  *
8068                  * Always keep in mind that the DSDT *will* have set the
8069                  * fans to what the vendor supposes is the best level.  We
8070                  * muck with it only to speed the fan up.
8071                  */
8072                 if (fan_control_resume_level != 7 &&
8073                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8074                         return;
8075                 else
8076                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8077                                  (current_level != fan_control_resume_level);
8078                 break;
8079         default:
8080                 return;
8081         }
8082         if (do_set) {
8083                 printk(TPACPI_NOTICE
8084                         "restoring fan level to 0x%02x\n",
8085                         fan_control_resume_level);
8086                 rc = fan_set_level_safe(fan_control_resume_level);
8087                 if (rc < 0)
8088                         printk(TPACPI_NOTICE
8089                                 "failed to restore fan level: %d\n", rc);
8090         }
8091 }
8092
8093 static int fan_read(struct seq_file *m)
8094 {
8095         int rc;
8096         u8 status;
8097         unsigned int speed = 0;
8098
8099         switch (fan_status_access_mode) {
8100         case TPACPI_FAN_RD_ACPI_GFAN:
8101                 /* 570, 600e/x, 770e, 770x */
8102                 rc = fan_get_status_safe(&status);
8103                 if (rc < 0)
8104                         return rc;
8105
8106                 seq_printf(m, "status:\t\t%s\n"
8107                                "level:\t\t%d\n",
8108                                (status != 0) ? "enabled" : "disabled", status);
8109                 break;
8110
8111         case TPACPI_FAN_RD_TPEC:
8112                 /* all except 570, 600e/x, 770e, 770x */
8113                 rc = fan_get_status_safe(&status);
8114                 if (rc < 0)
8115                         return rc;
8116
8117                 seq_printf(m, "status:\t\t%s\n",
8118                                (status != 0) ? "enabled" : "disabled");
8119
8120                 rc = fan_get_speed(&speed);
8121                 if (rc < 0)
8122                         return rc;
8123
8124                 seq_printf(m, "speed:\t\t%d\n", speed);
8125
8126                 if (status & TP_EC_FAN_FULLSPEED)
8127                         /* Disengaged mode takes precedence */
8128                         seq_printf(m, "level:\t\tdisengaged\n");
8129                 else if (status & TP_EC_FAN_AUTO)
8130                         seq_printf(m, "level:\t\tauto\n");
8131                 else
8132                         seq_printf(m, "level:\t\t%d\n", status);
8133                 break;
8134
8135         case TPACPI_FAN_NONE:
8136         default:
8137                 seq_printf(m, "status:\t\tnot supported\n");
8138         }
8139
8140         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
8141                 seq_printf(m, "commands:\tlevel <level>");
8142
8143                 switch (fan_control_access_mode) {
8144                 case TPACPI_FAN_WR_ACPI_SFAN:
8145                         seq_printf(m, " (<level> is 0-7)\n");
8146                         break;
8147
8148                 default:
8149                         seq_printf(m, " (<level> is 0-7, "
8150                                        "auto, disengaged, full-speed)\n");
8151                         break;
8152                 }
8153         }
8154
8155         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
8156                 seq_printf(m, "commands:\tenable, disable\n"
8157                                "commands:\twatchdog <timeout> (<timeout> "
8158                                "is 0 (off), 1-120 (seconds))\n");
8159
8160         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
8161                 seq_printf(m, "commands:\tspeed <speed>"
8162                                " (<speed> is 0-65535)\n");
8163
8164         return 0;
8165 }
8166
8167 static int fan_write_cmd_level(const char *cmd, int *rc)
8168 {
8169         int level;
8170
8171         if (strlencmp(cmd, "level auto") == 0)
8172                 level = TP_EC_FAN_AUTO;
8173         else if ((strlencmp(cmd, "level disengaged") == 0) |
8174                         (strlencmp(cmd, "level full-speed") == 0))
8175                 level = TP_EC_FAN_FULLSPEED;
8176         else if (sscanf(cmd, "level %d", &level) != 1)
8177                 return 0;
8178
8179         *rc = fan_set_level_safe(level);
8180         if (*rc == -ENXIO)
8181                 printk(TPACPI_ERR "level command accepted for unsupported "
8182                        "access mode %d", fan_control_access_mode);
8183         else if (!*rc)
8184                 tpacpi_disclose_usertask("procfs fan",
8185                         "set level to %d\n", level);
8186
8187         return 1;
8188 }
8189
8190 static int fan_write_cmd_enable(const char *cmd, int *rc)
8191 {
8192         if (strlencmp(cmd, "enable") != 0)
8193                 return 0;
8194
8195         *rc = fan_set_enable();
8196         if (*rc == -ENXIO)
8197                 printk(TPACPI_ERR "enable command accepted for unsupported "
8198                        "access mode %d", fan_control_access_mode);
8199         else if (!*rc)
8200                 tpacpi_disclose_usertask("procfs fan", "enable\n");
8201
8202         return 1;
8203 }
8204
8205 static int fan_write_cmd_disable(const char *cmd, int *rc)
8206 {
8207         if (strlencmp(cmd, "disable") != 0)
8208                 return 0;
8209
8210         *rc = fan_set_disable();
8211         if (*rc == -ENXIO)
8212                 printk(TPACPI_ERR "disable command accepted for unsupported "
8213                        "access mode %d", fan_control_access_mode);
8214         else if (!*rc)
8215                 tpacpi_disclose_usertask("procfs fan", "disable\n");
8216
8217         return 1;
8218 }
8219
8220 static int fan_write_cmd_speed(const char *cmd, int *rc)
8221 {
8222         int speed;
8223
8224         /* TODO:
8225          * Support speed <low> <medium> <high> ? */
8226
8227         if (sscanf(cmd, "speed %d", &speed) != 1)
8228                 return 0;
8229
8230         *rc = fan_set_speed(speed);
8231         if (*rc == -ENXIO)
8232                 printk(TPACPI_ERR "speed command accepted for unsupported "
8233                        "access mode %d", fan_control_access_mode);
8234         else if (!*rc)
8235                 tpacpi_disclose_usertask("procfs fan",
8236                         "set speed to %d\n", speed);
8237
8238         return 1;
8239 }
8240
8241 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
8242 {
8243         int interval;
8244
8245         if (sscanf(cmd, "watchdog %d", &interval) != 1)
8246                 return 0;
8247
8248         if (interval < 0 || interval > 120)
8249                 *rc = -EINVAL;
8250         else {
8251                 fan_watchdog_maxinterval = interval;
8252                 tpacpi_disclose_usertask("procfs fan",
8253                         "set watchdog timer to %d\n",
8254                         interval);
8255         }
8256
8257         return 1;
8258 }
8259
8260 static int fan_write(char *buf)
8261 {
8262         char *cmd;
8263         int rc = 0;
8264
8265         while (!rc && (cmd = next_cmd(&buf))) {
8266                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
8267                       fan_write_cmd_level(cmd, &rc)) &&
8268                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
8269                       (fan_write_cmd_enable(cmd, &rc) ||
8270                        fan_write_cmd_disable(cmd, &rc) ||
8271                        fan_write_cmd_watchdog(cmd, &rc))) &&
8272                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
8273                       fan_write_cmd_speed(cmd, &rc))
8274                     )
8275                         rc = -EINVAL;
8276                 else if (!rc)
8277                         fan_watchdog_reset();
8278         }
8279
8280         return rc;
8281 }
8282
8283 static struct ibm_struct fan_driver_data = {
8284         .name = "fan",
8285         .read = fan_read,
8286         .write = fan_write,
8287         .exit = fan_exit,
8288         .suspend = fan_suspend,
8289         .resume = fan_resume,
8290 };
8291
8292 /****************************************************************************
8293  ****************************************************************************
8294  *
8295  * Infrastructure
8296  *
8297  ****************************************************************************
8298  ****************************************************************************/
8299
8300 /*
8301  * HKEY event callout for other subdrivers go here
8302  * (yes, it is ugly, but it is quick, safe, and gets the job done
8303  */
8304 static void tpacpi_driver_event(const unsigned int hkey_event)
8305 {
8306         if (ibm_backlight_device) {
8307                 switch (hkey_event) {
8308                 case TP_HKEY_EV_BRGHT_UP:
8309                 case TP_HKEY_EV_BRGHT_DOWN:
8310                         tpacpi_brightness_notify_change();
8311                 }
8312         }
8313         if (alsa_card) {
8314                 switch (hkey_event) {
8315                 case TP_HKEY_EV_VOL_UP:
8316                 case TP_HKEY_EV_VOL_DOWN:
8317                 case TP_HKEY_EV_VOL_MUTE:
8318                         volume_alsa_notify_change();
8319                 }
8320         }
8321 }
8322
8323 static void hotkey_driver_event(const unsigned int scancode)
8324 {
8325         tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
8326 }
8327
8328 /* sysfs name ---------------------------------------------------------- */
8329 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
8330                            struct device_attribute *attr,
8331                            char *buf)
8332 {
8333         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
8334 }
8335
8336 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
8337         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
8338
8339 /* --------------------------------------------------------------------- */
8340
8341 /* /proc support */
8342 static struct proc_dir_entry *proc_dir;
8343
8344 /*
8345  * Module and infrastructure proble, init and exit handling
8346  */
8347
8348 static int force_load;
8349
8350 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
8351 static const char * __init str_supported(int is_supported)
8352 {
8353         static char text_unsupported[] __initdata = "not supported";
8354
8355         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
8356 }
8357 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
8358
8359 static void ibm_exit(struct ibm_struct *ibm)
8360 {
8361         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
8362
8363         list_del_init(&ibm->all_drivers);
8364
8365         if (ibm->flags.acpi_notify_installed) {
8366                 dbg_printk(TPACPI_DBG_EXIT,
8367                         "%s: acpi_remove_notify_handler\n", ibm->name);
8368                 BUG_ON(!ibm->acpi);
8369                 acpi_remove_notify_handler(*ibm->acpi->handle,
8370                                            ibm->acpi->type,
8371                                            dispatch_acpi_notify);
8372                 ibm->flags.acpi_notify_installed = 0;
8373                 ibm->flags.acpi_notify_installed = 0;
8374         }
8375
8376         if (ibm->flags.proc_created) {
8377                 dbg_printk(TPACPI_DBG_EXIT,
8378                         "%s: remove_proc_entry\n", ibm->name);
8379                 remove_proc_entry(ibm->name, proc_dir);
8380                 ibm->flags.proc_created = 0;
8381         }
8382
8383         if (ibm->flags.acpi_driver_registered) {
8384                 dbg_printk(TPACPI_DBG_EXIT,
8385                         "%s: acpi_bus_unregister_driver\n", ibm->name);
8386                 BUG_ON(!ibm->acpi);
8387                 acpi_bus_unregister_driver(ibm->acpi->driver);
8388                 kfree(ibm->acpi->driver);
8389                 ibm->acpi->driver = NULL;
8390                 ibm->flags.acpi_driver_registered = 0;
8391         }
8392
8393         if (ibm->flags.init_called && ibm->exit) {
8394                 ibm->exit();
8395                 ibm->flags.init_called = 0;
8396         }
8397
8398         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
8399 }
8400
8401 static int __init ibm_init(struct ibm_init_struct *iibm)
8402 {
8403         int ret;
8404         struct ibm_struct *ibm = iibm->data;
8405         struct proc_dir_entry *entry;
8406
8407         BUG_ON(ibm == NULL);
8408
8409         INIT_LIST_HEAD(&ibm->all_drivers);
8410
8411         if (ibm->flags.experimental && !experimental)
8412                 return 0;
8413
8414         dbg_printk(TPACPI_DBG_INIT,
8415                 "probing for %s\n", ibm->name);
8416
8417         if (iibm->init) {
8418                 ret = iibm->init(iibm);
8419                 if (ret > 0)
8420                         return 0;       /* probe failed */
8421                 if (ret)
8422                         return ret;
8423
8424                 ibm->flags.init_called = 1;
8425         }
8426
8427         if (ibm->acpi) {
8428                 if (ibm->acpi->hid) {
8429                         ret = register_tpacpi_subdriver(ibm);
8430                         if (ret)
8431                                 goto err_out;
8432                 }
8433
8434                 if (ibm->acpi->notify) {
8435                         ret = setup_acpi_notify(ibm);
8436                         if (ret == -ENODEV) {
8437                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
8438                                         ibm->name);
8439                                 ret = 0;
8440                                 goto err_out;
8441                         }
8442                         if (ret < 0)
8443                                 goto err_out;
8444                 }
8445         }
8446
8447         dbg_printk(TPACPI_DBG_INIT,
8448                 "%s installed\n", ibm->name);
8449
8450         if (ibm->read) {
8451                 mode_t mode;
8452
8453                 mode = S_IRUGO;
8454                 if (ibm->write)
8455                         mode |= S_IWUSR;
8456                 entry = proc_create_data(ibm->name, mode, proc_dir,
8457                                          &dispatch_proc_fops, ibm);
8458                 if (!entry) {
8459                         printk(TPACPI_ERR "unable to create proc entry %s\n",
8460                                ibm->name);
8461                         ret = -ENODEV;
8462                         goto err_out;
8463                 }
8464                 ibm->flags.proc_created = 1;
8465         }
8466
8467         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
8468
8469         return 0;
8470
8471 err_out:
8472         dbg_printk(TPACPI_DBG_INIT,
8473                 "%s: at error exit path with result %d\n",
8474                 ibm->name, ret);
8475
8476         ibm_exit(ibm);
8477         return (ret < 0)? ret : 0;
8478 }
8479
8480 /* Probing */
8481
8482 static bool __pure __init tpacpi_is_fw_digit(const char c)
8483 {
8484         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
8485 }
8486
8487 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
8488 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
8489                                                 const char t)
8490 {
8491         return s && strlen(s) >= 8 &&
8492                 tpacpi_is_fw_digit(s[0]) &&
8493                 tpacpi_is_fw_digit(s[1]) &&
8494                 s[2] == t && s[3] == 'T' &&
8495                 tpacpi_is_fw_digit(s[4]) &&
8496                 tpacpi_is_fw_digit(s[5]) &&
8497                 s[6] == 'W' && s[7] == 'W';
8498 }
8499
8500 /* returns 0 - probe ok, or < 0 - probe error.
8501  * Probe ok doesn't mean thinkpad found.
8502  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
8503 static int __must_check __init get_thinkpad_model_data(
8504                                                 struct thinkpad_id_data *tp)
8505 {
8506         const struct dmi_device *dev = NULL;
8507         char ec_fw_string[18];
8508         char const *s;
8509
8510         if (!tp)
8511                 return -EINVAL;
8512
8513         memset(tp, 0, sizeof(*tp));
8514
8515         if (dmi_name_in_vendors("IBM"))
8516                 tp->vendor = PCI_VENDOR_ID_IBM;
8517         else if (dmi_name_in_vendors("LENOVO"))
8518                 tp->vendor = PCI_VENDOR_ID_LENOVO;
8519         else
8520                 return 0;
8521
8522         s = dmi_get_system_info(DMI_BIOS_VERSION);
8523         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
8524         if (s && !tp->bios_version_str)
8525                 return -ENOMEM;
8526
8527         /* Really ancient ThinkPad 240X will fail this, which is fine */
8528         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
8529                 return 0;
8530
8531         tp->bios_model = tp->bios_version_str[0]
8532                          | (tp->bios_version_str[1] << 8);
8533         tp->bios_release = (tp->bios_version_str[4] << 8)
8534                          | tp->bios_version_str[5];
8535
8536         /*
8537          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
8538          * X32 or newer, all Z series;  Some models must have an
8539          * up-to-date BIOS or they will not be detected.
8540          *
8541          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8542          */
8543         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
8544                 if (sscanf(dev->name,
8545                            "IBM ThinkPad Embedded Controller -[%17c",
8546                            ec_fw_string) == 1) {
8547                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
8548                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
8549
8550                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
8551                         if (!tp->ec_version_str)
8552                                 return -ENOMEM;
8553
8554                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
8555                                 tp->ec_model = ec_fw_string[0]
8556                                                 | (ec_fw_string[1] << 8);
8557                                 tp->ec_release = (ec_fw_string[4] << 8)
8558                                                 | ec_fw_string[5];
8559                         } else {
8560                                 printk(TPACPI_NOTICE
8561                                         "ThinkPad firmware release %s "
8562                                         "doesn't match the known patterns\n",
8563                                         ec_fw_string);
8564                                 printk(TPACPI_NOTICE
8565                                         "please report this to %s\n",
8566                                         TPACPI_MAIL);
8567                         }
8568                         break;
8569                 }
8570         }
8571
8572         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
8573         if (s && !strnicmp(s, "ThinkPad", 8)) {
8574                 tp->model_str = kstrdup(s, GFP_KERNEL);
8575                 if (!tp->model_str)
8576                         return -ENOMEM;
8577         }
8578
8579         s = dmi_get_system_info(DMI_PRODUCT_NAME);
8580         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
8581         if (s && !tp->nummodel_str)
8582                 return -ENOMEM;
8583
8584         return 0;
8585 }
8586
8587 static int __init probe_for_thinkpad(void)
8588 {
8589         int is_thinkpad;
8590
8591         if (acpi_disabled)
8592                 return -ENODEV;
8593
8594         /*
8595          * Non-ancient models have better DMI tagging, but very old models
8596          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
8597          */
8598         is_thinkpad = (thinkpad_id.model_str != NULL) ||
8599                       (thinkpad_id.ec_model != 0) ||
8600                       tpacpi_is_fw_known();
8601
8602         /* ec is required because many other handles are relative to it */
8603         TPACPI_ACPIHANDLE_INIT(ec);
8604         if (!ec_handle) {
8605                 if (is_thinkpad)
8606                         printk(TPACPI_ERR
8607                                 "Not yet supported ThinkPad detected!\n");
8608                 return -ENODEV;
8609         }
8610
8611         if (!is_thinkpad && !force_load)
8612                 return -ENODEV;
8613
8614         return 0;
8615 }
8616
8617
8618 /* Module init, exit, parameters */
8619
8620 static struct ibm_init_struct ibms_init[] __initdata = {
8621         {
8622                 .init = thinkpad_acpi_driver_init,
8623                 .data = &thinkpad_acpi_driver_data,
8624         },
8625         {
8626                 .init = hotkey_init,
8627                 .data = &hotkey_driver_data,
8628         },
8629         {
8630                 .init = bluetooth_init,
8631                 .data = &bluetooth_driver_data,
8632         },
8633         {
8634                 .init = wan_init,
8635                 .data = &wan_driver_data,
8636         },
8637         {
8638                 .init = uwb_init,
8639                 .data = &uwb_driver_data,
8640         },
8641 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
8642         {
8643                 .init = video_init,
8644                 .data = &video_driver_data,
8645         },
8646 #endif
8647         {
8648                 .init = light_init,
8649                 .data = &light_driver_data,
8650         },
8651         {
8652                 .init = cmos_init,
8653                 .data = &cmos_driver_data,
8654         },
8655         {
8656                 .init = led_init,
8657                 .data = &led_driver_data,
8658         },
8659         {
8660                 .init = beep_init,
8661                 .data = &beep_driver_data,
8662         },
8663         {
8664                 .init = thermal_init,
8665                 .data = &thermal_driver_data,
8666         },
8667         {
8668                 .data = &ecdump_driver_data,
8669         },
8670         {
8671                 .init = brightness_init,
8672                 .data = &brightness_driver_data,
8673         },
8674         {
8675                 .init = volume_init,
8676                 .data = &volume_driver_data,
8677         },
8678         {
8679                 .init = fan_init,
8680                 .data = &fan_driver_data,
8681         },
8682 };
8683
8684 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
8685 {
8686         unsigned int i;
8687         struct ibm_struct *ibm;
8688
8689         if (!kp || !kp->name || !val)
8690                 return -EINVAL;
8691
8692         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8693                 ibm = ibms_init[i].data;
8694                 WARN_ON(ibm == NULL);
8695
8696                 if (!ibm || !ibm->name)
8697                         continue;
8698
8699                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
8700                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
8701                                 return -ENOSPC;
8702                         strcpy(ibms_init[i].param, val);
8703                         strcat(ibms_init[i].param, ",");
8704                         return 0;
8705                 }
8706         }
8707
8708         return -EINVAL;
8709 }
8710
8711 module_param(experimental, int, 0444);
8712 MODULE_PARM_DESC(experimental,
8713                  "Enables experimental features when non-zero");
8714
8715 module_param_named(debug, dbg_level, uint, 0);
8716 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
8717
8718 module_param(force_load, bool, 0444);
8719 MODULE_PARM_DESC(force_load,
8720                  "Attempts to load the driver even on a "
8721                  "mis-identified ThinkPad when true");
8722
8723 module_param_named(fan_control, fan_control_allowed, bool, 0444);
8724 MODULE_PARM_DESC(fan_control,
8725                  "Enables setting fan parameters features when true");
8726
8727 module_param_named(brightness_mode, brightness_mode, uint, 0444);
8728 MODULE_PARM_DESC(brightness_mode,
8729                  "Selects brightness control strategy: "
8730                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
8731
8732 module_param(brightness_enable, uint, 0444);
8733 MODULE_PARM_DESC(brightness_enable,
8734                  "Enables backlight control when 1, disables when 0");
8735
8736 module_param(hotkey_report_mode, uint, 0444);
8737 MODULE_PARM_DESC(hotkey_report_mode,
8738                  "used for backwards compatibility with userspace, "
8739                  "see documentation");
8740
8741 module_param_named(volume_mode, volume_mode, uint, 0444);
8742 MODULE_PARM_DESC(volume_mode,
8743                  "Selects volume control strategy: "
8744                  "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
8745
8746 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
8747 MODULE_PARM_DESC(volume_capabilities,
8748                  "Selects the mixer capabilites: "
8749                  "0=auto, 1=volume and mute, 2=mute only");
8750
8751 module_param_named(volume_control, volume_control_allowed, bool, 0444);
8752 MODULE_PARM_DESC(volume_control,
8753                  "Enables software override for the console audio "
8754                  "control when true");
8755
8756 /* ALSA module API parameters */
8757 module_param_named(index, alsa_index, int, 0444);
8758 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
8759 module_param_named(id, alsa_id, charp, 0444);
8760 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
8761 module_param_named(enable, alsa_enable, bool, 0444);
8762 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
8763
8764 #define TPACPI_PARAM(feature) \
8765         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
8766         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
8767                          "at module load, see documentation")
8768
8769 TPACPI_PARAM(hotkey);
8770 TPACPI_PARAM(bluetooth);
8771 TPACPI_PARAM(video);
8772 TPACPI_PARAM(light);
8773 TPACPI_PARAM(cmos);
8774 TPACPI_PARAM(led);
8775 TPACPI_PARAM(beep);
8776 TPACPI_PARAM(ecdump);
8777 TPACPI_PARAM(brightness);
8778 TPACPI_PARAM(volume);
8779 TPACPI_PARAM(fan);
8780
8781 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
8782 module_param(dbg_wlswemul, uint, 0444);
8783 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
8784 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
8785 MODULE_PARM_DESC(wlsw_state,
8786                  "Initial state of the emulated WLSW switch");
8787
8788 module_param(dbg_bluetoothemul, uint, 0444);
8789 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
8790 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
8791 MODULE_PARM_DESC(bluetooth_state,
8792                  "Initial state of the emulated bluetooth switch");
8793
8794 module_param(dbg_wwanemul, uint, 0444);
8795 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
8796 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
8797 MODULE_PARM_DESC(wwan_state,
8798                  "Initial state of the emulated WWAN switch");
8799
8800 module_param(dbg_uwbemul, uint, 0444);
8801 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
8802 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
8803 MODULE_PARM_DESC(uwb_state,
8804                  "Initial state of the emulated UWB switch");
8805 #endif
8806
8807 static void thinkpad_acpi_module_exit(void)
8808 {
8809         struct ibm_struct *ibm, *itmp;
8810
8811         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
8812
8813         list_for_each_entry_safe_reverse(ibm, itmp,
8814                                          &tpacpi_all_drivers,
8815                                          all_drivers) {
8816                 ibm_exit(ibm);
8817         }
8818
8819         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
8820
8821         if (tpacpi_inputdev) {
8822                 if (tp_features.input_device_registered)
8823                         input_unregister_device(tpacpi_inputdev);
8824                 else
8825                         input_free_device(tpacpi_inputdev);
8826         }
8827
8828         if (tpacpi_hwmon)
8829                 hwmon_device_unregister(tpacpi_hwmon);
8830
8831         if (tp_features.sensors_pdev_attrs_registered)
8832                 device_remove_file(&tpacpi_sensors_pdev->dev,
8833                                    &dev_attr_thinkpad_acpi_pdev_name);
8834         if (tpacpi_sensors_pdev)
8835                 platform_device_unregister(tpacpi_sensors_pdev);
8836         if (tpacpi_pdev)
8837                 platform_device_unregister(tpacpi_pdev);
8838
8839         if (tp_features.sensors_pdrv_attrs_registered)
8840                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
8841         if (tp_features.platform_drv_attrs_registered)
8842                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
8843
8844         if (tp_features.sensors_pdrv_registered)
8845                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
8846
8847         if (tp_features.platform_drv_registered)
8848                 platform_driver_unregister(&tpacpi_pdriver);
8849
8850         if (proc_dir)
8851                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
8852
8853         if (tpacpi_wq)
8854                 destroy_workqueue(tpacpi_wq);
8855
8856         kfree(thinkpad_id.bios_version_str);
8857         kfree(thinkpad_id.ec_version_str);
8858         kfree(thinkpad_id.model_str);
8859 }
8860
8861
8862 static int __init thinkpad_acpi_module_init(void)
8863 {
8864         int ret, i;
8865
8866         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8867
8868         /* Parameter checking */
8869         if (hotkey_report_mode > 2)
8870                 return -EINVAL;
8871
8872         /* Driver-level probe */
8873
8874         ret = get_thinkpad_model_data(&thinkpad_id);
8875         if (ret) {
8876                 printk(TPACPI_ERR
8877                         "unable to get DMI data: %d\n", ret);
8878                 thinkpad_acpi_module_exit();
8879                 return ret;
8880         }
8881         ret = probe_for_thinkpad();
8882         if (ret) {
8883                 thinkpad_acpi_module_exit();
8884                 return ret;
8885         }
8886
8887         /* Driver initialization */
8888
8889         TPACPI_ACPIHANDLE_INIT(ecrd);
8890         TPACPI_ACPIHANDLE_INIT(ecwr);
8891
8892         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8893         if (!tpacpi_wq) {
8894                 thinkpad_acpi_module_exit();
8895                 return -ENOMEM;
8896         }
8897
8898         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8899         if (!proc_dir) {
8900                 printk(TPACPI_ERR
8901                        "unable to create proc dir " TPACPI_PROC_DIR);
8902                 thinkpad_acpi_module_exit();
8903                 return -ENODEV;
8904         }
8905
8906         ret = platform_driver_register(&tpacpi_pdriver);
8907         if (ret) {
8908                 printk(TPACPI_ERR
8909                        "unable to register main platform driver\n");
8910                 thinkpad_acpi_module_exit();
8911                 return ret;
8912         }
8913         tp_features.platform_drv_registered = 1;
8914
8915         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8916         if (ret) {
8917                 printk(TPACPI_ERR
8918                        "unable to register hwmon platform driver\n");
8919                 thinkpad_acpi_module_exit();
8920                 return ret;
8921         }
8922         tp_features.sensors_pdrv_registered = 1;
8923
8924         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8925         if (!ret) {
8926                 tp_features.platform_drv_attrs_registered = 1;
8927                 ret = tpacpi_create_driver_attributes(
8928                                         &tpacpi_hwmon_pdriver.driver);
8929         }
8930         if (ret) {
8931                 printk(TPACPI_ERR
8932                        "unable to create sysfs driver attributes\n");
8933                 thinkpad_acpi_module_exit();
8934                 return ret;
8935         }
8936         tp_features.sensors_pdrv_attrs_registered = 1;
8937
8938
8939         /* Device initialization */
8940         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8941                                                         NULL, 0);
8942         if (IS_ERR(tpacpi_pdev)) {
8943                 ret = PTR_ERR(tpacpi_pdev);
8944                 tpacpi_pdev = NULL;
8945                 printk(TPACPI_ERR "unable to register platform device\n");
8946                 thinkpad_acpi_module_exit();
8947                 return ret;
8948         }
8949         tpacpi_sensors_pdev = platform_device_register_simple(
8950                                                 TPACPI_HWMON_DRVR_NAME,
8951                                                 -1, NULL, 0);
8952         if (IS_ERR(tpacpi_sensors_pdev)) {
8953                 ret = PTR_ERR(tpacpi_sensors_pdev);
8954                 tpacpi_sensors_pdev = NULL;
8955                 printk(TPACPI_ERR
8956                        "unable to register hwmon platform device\n");
8957                 thinkpad_acpi_module_exit();
8958                 return ret;
8959         }
8960         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8961                                  &dev_attr_thinkpad_acpi_pdev_name);
8962         if (ret) {
8963                 printk(TPACPI_ERR
8964                        "unable to create sysfs hwmon device attributes\n");
8965                 thinkpad_acpi_module_exit();
8966                 return ret;
8967         }
8968         tp_features.sensors_pdev_attrs_registered = 1;
8969         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8970         if (IS_ERR(tpacpi_hwmon)) {
8971                 ret = PTR_ERR(tpacpi_hwmon);
8972                 tpacpi_hwmon = NULL;
8973                 printk(TPACPI_ERR "unable to register hwmon device\n");
8974                 thinkpad_acpi_module_exit();
8975                 return ret;
8976         }
8977         mutex_init(&tpacpi_inputdev_send_mutex);
8978         tpacpi_inputdev = input_allocate_device();
8979         if (!tpacpi_inputdev) {
8980                 printk(TPACPI_ERR "unable to allocate input device\n");
8981                 thinkpad_acpi_module_exit();
8982                 return -ENOMEM;
8983         } else {
8984                 /* Prepare input device, but don't register */
8985                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8986                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8987                 tpacpi_inputdev->id.bustype = BUS_HOST;
8988                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8989                                                 thinkpad_id.vendor :
8990                                                 PCI_VENDOR_ID_IBM;
8991                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8992                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8993                 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
8994         }
8995         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8996                 ret = ibm_init(&ibms_init[i]);
8997                 if (ret >= 0 && *ibms_init[i].param)
8998                         ret = ibms_init[i].data->write(ibms_init[i].param);
8999                 if (ret < 0) {
9000                         thinkpad_acpi_module_exit();
9001                         return ret;
9002                 }
9003         }
9004         ret = input_register_device(tpacpi_inputdev);
9005         if (ret < 0) {
9006                 printk(TPACPI_ERR "unable to register input device\n");
9007                 thinkpad_acpi_module_exit();
9008                 return ret;
9009         } else {
9010                 tp_features.input_device_registered = 1;
9011         }
9012
9013         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
9014         return 0;
9015 }
9016
9017 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
9018
9019 /*
9020  * This will autoload the driver in almost every ThinkPad
9021  * in widespread use.
9022  *
9023  * Only _VERY_ old models, like the 240, 240x and 570 lack
9024  * the HKEY event interface.
9025  */
9026 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
9027
9028 /*
9029  * DMI matching for module autoloading
9030  *
9031  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
9032  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
9033  *
9034  * Only models listed in thinkwiki will be supported, so add yours
9035  * if it is not there yet.
9036  */
9037 #define IBM_BIOS_MODULE_ALIAS(__type) \
9038         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
9039
9040 /* Ancient thinkpad BIOSes have to be identified by
9041  * BIOS type or model number, and there are far less
9042  * BIOS types than model numbers... */
9043 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
9044
9045 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
9046 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
9047 MODULE_DESCRIPTION(TPACPI_DESC);
9048 MODULE_VERSION(TPACPI_VERSION);
9049 MODULE_LICENSE("GPL");
9050
9051 module_init(thinkpad_acpi_module_init);
9052 module_exit(thinkpad_acpi_module_exit);