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   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.23"
  25 #define TPACPI_SYSFS_VERSION 0x020400
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/sched.h>
  58 #include <linux/kthread.h>
  59 #include <linux/freezer.h>
  60 #include <linux/delay.h>
  61
  62 #include <linux/nvram.h>
  63 #include <linux/proc_fs.h>
  64 #include <linux/sysfs.h>
  65 #include <linux/backlight.h>
  66 #include <linux/fb.h>
  67 #include <linux/platform_device.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/input.h>
  71 #include <linux/leds.h>
  72 #include <linux/rfkill.h>
  73 #include <asm/uaccess.h>
  74
  75 #include <linux/dmi.h>
  76 #include <linux/jiffies.h>
  77 #include <linux/workqueue.h>
  78
  79 #include <acpi/acpi_drivers.h>
  80
  81 #include <linux/pci_ids.h>
  82
  83
  84 /* ThinkPad CMOS commands */
  85 #define TP_CMOS_VOLUME_DOWN     0
  86 #define TP_CMOS_VOLUME_UP       1
  87 #define TP_CMOS_VOLUME_MUTE     2
  88 #define TP_CMOS_BRIGHTNESS_UP   4
  89 #define TP_CMOS_BRIGHTNESS_DOWN 5
  90 #define TP_CMOS_THINKLIGHT_ON   12
  91 #define TP_CMOS_THINKLIGHT_OFF  13
  92
  93 /* NVRAM Addresses */
  94 enum tp_nvram_addr {
  95         TP_NVRAM_ADDR_HK2               = 0x57,
  96         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  97         TP_NVRAM_ADDR_VIDEO             = 0x59,
  98         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  99         TP_NVRAM_ADDR_MIXER             = 0x60,
 100 };
 101
 102 /* NVRAM bit masks */
 103 enum {
 104         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 105         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 106         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 107         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 108         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 109         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 110         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 111         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 112         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 113         TP_NVRAM_MASK_MUTE              = 0x40,
 114         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 115         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 116         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 117 };
 118
 119 /* ACPI HIDs */
 120 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 121
 122 /* Input IDs */
 123 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 124 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 125
 126 /* ACPI \WGSV commands */
 127 enum {
 128         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 129         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 130         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 131         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 132 };
 133
 134 /* TP_ACPI_WGSV_GET_STATE bits */
 135 enum {
 136         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 137         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 138         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 139         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 140         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 141         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 142         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 143         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 144         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 145         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 146 };
 147
 148 /****************************************************************************
 149  * Main driver
 150  */
 151
 152 #define TPACPI_NAME "thinkpad"
 153 #define TPACPI_DESC "ThinkPad ACPI Extras"
 154 #define TPACPI_FILE TPACPI_NAME "_acpi"
 155 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 156 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 157
 158 #define TPACPI_PROC_DIR "ibm"
 159 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 160 #define TPACPI_DRVR_NAME TPACPI_FILE
 161 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 162 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 163
 164 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 165 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 166
 167 #define TPACPI_MAX_ACPI_ARGS 3
 168
 169 /* printk headers */
 170 #define TPACPI_LOG TPACPI_FILE ": "
 171 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 172 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 173 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 174 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 175 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 176 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 177 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 178 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 179
 180 /* Debugging printk groups */
 181 #define TPACPI_DBG_ALL          0xffff
 182 #define TPACPI_DBG_DISCLOSETASK 0x8000
 183 #define TPACPI_DBG_INIT         0x0001
 184 #define TPACPI_DBG_EXIT         0x0002
 185 #define TPACPI_DBG_RFKILL       0x0004
 186 #define TPACPI_DBG_HKEY         0x0008
 187 #define TPACPI_DBG_FAN          0x0010
 188 #define TPACPI_DBG_BRGHT        0x0020
 189
 190 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 191 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 192 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 193
 194
 195 /****************************************************************************
 196  * Driver-wide structs and misc. variables
 197  */
 198
 199 struct ibm_struct;
 200
 201 struct tp_acpi_drv_struct {
 202         const struct acpi_device_id *hid;
 203         struct acpi_driver *driver;
 204
 205         void (*notify) (struct ibm_struct *, u32);
 206         acpi_handle *handle;
 207         u32 type;
 208         struct acpi_device *device;
 209 };
 210
 211 struct ibm_struct {
 212         char *name;
 213
 214         int (*read) (char *);
 215         int (*write) (char *);
 216         void (*exit) (void);
 217         void (*resume) (void);
 218         void (*suspend) (pm_message_t state);
 219         void (*shutdown) (void);
 220
 221         struct list_head all_drivers;
 222
 223         struct tp_acpi_drv_struct *acpi;
 224
 225         struct {
 226                 u8 acpi_driver_registered:1;
 227                 u8 acpi_notify_installed:1;
 228                 u8 proc_created:1;
 229                 u8 init_called:1;
 230                 u8 experimental:1;
 231         } flags;
 232 };
 233
 234 struct ibm_init_struct {
 235         char param[32];
 236
 237         int (*init) (struct ibm_init_struct *);
 238         struct ibm_struct *data;
 239 };
 240
 241 static struct {
 242         u32 bluetooth:1;
 243         u32 hotkey:1;
 244         u32 hotkey_mask:1;
 245         u32 hotkey_wlsw:1;
 246         u32 hotkey_tablet:1;
 247         u32 light:1;
 248         u32 light_status:1;
 249         u32 bright_16levels:1;
 250         u32 bright_acpimode:1;
 251         u32 wan:1;
 252         u32 uwb:1;
 253         u32 fan_ctrl_status_undef:1;
 254         u32 second_fan:1;
 255         u32 beep_needs_two_args:1;
 256         u32 input_device_registered:1;
 257         u32 platform_drv_registered:1;
 258         u32 platform_drv_attrs_registered:1;
 259         u32 sensors_pdrv_registered:1;
 260         u32 sensors_pdrv_attrs_registered:1;
 261         u32 sensors_pdev_attrs_registered:1;
 262         u32 hotkey_poll_active:1;
 263 } tp_features;
 264
 265 static struct {
 266         u16 hotkey_mask_ff:1;
 267 } tp_warned;
 268
 269 struct thinkpad_id_data {
 270         unsigned int vendor;    /* ThinkPad vendor:
 271                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 272
 273         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 274         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 275
 276         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 277         u16 ec_model;
 278         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 279         u16 ec_release;
 280
 281         char *model_str;        /* ThinkPad T43 */
 282         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 283 };
 284 static struct thinkpad_id_data thinkpad_id;
 285
 286 static enum {
 287         TPACPI_LIFE_INIT = 0,
 288         TPACPI_LIFE_RUNNING,
 289         TPACPI_LIFE_EXITING,
 290 } tpacpi_lifecycle;
 291
 292 static int experimental;
 293 static u32 dbg_level;
 294
 295 static struct workqueue_struct *tpacpi_wq;
 296
 297 enum led_status_t {
 298         TPACPI_LED_OFF = 0,
 299         TPACPI_LED_ON,
 300         TPACPI_LED_BLINK,
 301 };
 302
 303 /* Special LED class that can defer work */
 304 struct tpacpi_led_classdev {
 305         struct led_classdev led_classdev;
 306         struct work_struct work;
 307         enum led_status_t new_state;
 308         unsigned int led;
 309 };
 310
 311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 312 static int dbg_wlswemul;
 313 static int tpacpi_wlsw_emulstate;
 314 static int dbg_bluetoothemul;
 315 static int tpacpi_bluetooth_emulstate;
 316 static int dbg_wwanemul;
 317 static int tpacpi_wwan_emulstate;
 318 static int dbg_uwbemul;
 319 static int tpacpi_uwb_emulstate;
 320 #endif
 321
 322
 323 /*************************************************************************
 324  *  Debugging helpers
 325  */
 326
 327 #define dbg_printk(a_dbg_level, format, arg...) \
 328         do { if (dbg_level & (a_dbg_level)) \
 329                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 330         } while (0)
 331
 332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 333 #define vdbg_printk dbg_printk
 334 static const char *str_supported(int is_supported);
 335 #else
 336 #define vdbg_printk(a_dbg_level, format, arg...) \
 337         do { } while (0)
 338 #endif
 339
 340 static void tpacpi_log_usertask(const char * const what)
 341 {
 342         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 343                 what, task_tgid_vnr(current));
 344 }
 345
 346 #define tpacpi_disclose_usertask(what, format, arg...) \
 347         do { \
 348                 if (unlikely( \
 349                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 350                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 351                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 352                                 what, task_tgid_vnr(current), ## arg); \
 353                 } \
 354         } while (0)
 355
 356 /*
 357  * Quirk handling helpers
 358  *
 359  * ThinkPad IDs and versions seen in the field so far
 360  * are two-characters from the set [0-9A-Z], i.e. base 36.
 361  *
 362  * We use values well outside that range as specials.
 363  */
 364
 365 #define TPACPI_MATCH_ANY                0xffffU
 366 #define TPACPI_MATCH_UNKNOWN            0U
 367
 368 /* TPID('1', 'Y') == 0x5931 */
 369 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 370
 371 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 372         { .vendor = PCI_VENDOR_ID_IBM,          \
 373           .bios = TPID(__id1, __id2),           \
 374           .ec = TPACPI_MATCH_ANY,               \
 375           .quirks = (__quirk) }
 376
 377 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 378         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 379           .bios = TPID(__id1, __id2),           \
 380           .ec = TPACPI_MATCH_ANY,               \
 381           .quirks = (__quirk) }
 382
 383 struct tpacpi_quirk {
 384         unsigned int vendor;
 385         u16 bios;
 386         u16 ec;
 387         unsigned long quirks;
 388 };
 389
 390 /**
 391  * tpacpi_check_quirks() - search BIOS/EC version on a list
 392  * @qlist:              array of &struct tpacpi_quirk
 393  * @qlist_size:         number of elements in @qlist
 394  *
 395  * Iterates over a quirks list until one is found that matches the
 396  * ThinkPad's vendor, BIOS and EC model.
 397  *
 398  * Returns 0 if nothing matches, otherwise returns the quirks field of
 399  * the matching &struct tpacpi_quirk entry.
 400  *
 401  * The match criteria is: vendor, ec and bios much match.
 402  */
 403 static unsigned long __init tpacpi_check_quirks(
 404                         const struct tpacpi_quirk *qlist,
 405                         unsigned int qlist_size)
 406 {
 407         while (qlist_size) {
 408                 if ((qlist->vendor == thinkpad_id.vendor ||
 409                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 410                     (qlist->bios == thinkpad_id.bios_model ||
 411                                 qlist->bios == TPACPI_MATCH_ANY) &&
 412                     (qlist->ec == thinkpad_id.ec_model ||
 413                                 qlist->ec == TPACPI_MATCH_ANY))
 414                         return qlist->quirks;
 415
 416                 qlist_size--;
 417                 qlist++;
 418         }
 419         return 0;
 420 }
 421
 422
 423 /****************************************************************************
 424  ****************************************************************************
 425  *
 426  * ACPI Helpers and device model
 427  *
 428  ****************************************************************************
 429  ****************************************************************************/
 430
 431 /*************************************************************************
 432  * ACPI basic handles
 433  */
 434
 435 static acpi_handle root_handle;
 436
 437 #define TPACPI_HANDLE(object, parent, paths...)                 \
 438         static acpi_handle  object##_handle;                    \
 439         static acpi_handle *object##_parent = &parent##_handle; \
 440         static char        *object##_path;                      \
 441         static char        *object##_paths[] = { paths }
 442
 443 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 444            "\\_SB.PCI.ISA.EC",  /* 570 */
 445            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 446            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 447            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 448            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 449            "\\_SB.PCI0.LPC.EC", /* all others */
 450            );
 451
 452 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 453 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 454
 455 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 456                                         /* T4x, X31, X40 */
 457            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 458            "\\CMS",             /* R40, R40e */
 459            );                   /* all others */
 460
 461 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 462            "^HKEY",             /* R30, R31 */
 463            "HKEY",              /* all others */
 464            );                   /* 570 */
 465
 466 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 467            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 468            "\\_SB.PCI0.VID0",   /* 770e */
 469            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 470            "\\_SB.PCI0.AGP.VID",        /* all others */
 471            );                           /* R30, R31 */
 472
 473
 474 /*************************************************************************
 475  * ACPI helpers
 476  */
 477
 478 static int acpi_evalf(acpi_handle handle,
 479                       void *res, char *method, char *fmt, ...)
 480 {
 481         char *fmt0 = fmt;
 482         struct acpi_object_list params;
 483         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 484         struct acpi_buffer result, *resultp;
 485         union acpi_object out_obj;
 486         acpi_status status;
 487         va_list ap;
 488         char res_type;
 489         int success;
 490         int quiet;
 491
 492         if (!*fmt) {
 493                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 494                 return 0;
 495         }
 496
 497         if (*fmt == 'q') {
 498                 quiet = 1;
 499                 fmt++;
 500         } else
 501                 quiet = 0;
 502
 503         res_type = *(fmt++);
 504
 505         params.count = 0;
 506         params.pointer = &in_objs[0];
 507
 508         va_start(ap, fmt);
 509         while (*fmt) {
 510                 char c = *(fmt++);
 511                 switch (c) {
 512                 case 'd':       /* int */
 513                         in_objs[params.count].integer.value = va_arg(ap, int);
 514                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 515                         break;
 516                         /* add more types as needed */
 517                 default:
 518                         printk(TPACPI_ERR "acpi_evalf() called "
 519                                "with invalid format character '%c'\n", c);
 520                         return 0;
 521                 }
 522         }
 523         va_end(ap);
 524
 525         if (res_type != 'v') {
 526                 result.length = sizeof(out_obj);
 527                 result.pointer = &out_obj;
 528                 resultp = &result;
 529         } else
 530                 resultp = NULL;
 531
 532         status = acpi_evaluate_object(handle, method, &params, resultp);
 533
 534         switch (res_type) {
 535         case 'd':               /* int */
 536                 if (res)
 537                         *(int *)res = out_obj.integer.value;
 538                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 539                 break;
 540         case 'v':               /* void */
 541                 success = status == AE_OK;
 542                 break;
 543                 /* add more types as needed */
 544         default:
 545                 printk(TPACPI_ERR "acpi_evalf() called "
 546                        "with invalid format character '%c'\n", res_type);
 547                 return 0;
 548         }
 549
 550         if (!success && !quiet)
 551                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 552                        method, fmt0, status);
 553
 554         return success;
 555 }
 556
 557 static int acpi_ec_read(int i, u8 *p)
 558 {
 559         int v;
 560
 561         if (ecrd_handle) {
 562                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 563                         return 0;
 564                 *p = v;
 565         } else {
 566                 if (ec_read(i, p) < 0)
 567                         return 0;
 568         }
 569
 570         return 1;
 571 }
 572
 573 static int acpi_ec_write(int i, u8 v)
 574 {
 575         if (ecwr_handle) {
 576                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 577                         return 0;
 578         } else {
 579                 if (ec_write(i, v) < 0)
 580                         return 0;
 581         }
 582
 583         return 1;
 584 }
 585
 586 static int issue_thinkpad_cmos_command(int cmos_cmd)
 587 {
 588         if (!cmos_handle)
 589                 return -ENXIO;
 590
 591         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 592                 return -EIO;
 593
 594         return 0;
 595 }
 596
 597 /*************************************************************************
 598  * ACPI device model
 599  */
 600
 601 #define TPACPI_ACPIHANDLE_INIT(object) \
 602         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 603                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 604
 605 static void drv_acpi_handle_init(char *name,
 606                            acpi_handle *handle, acpi_handle parent,
 607                            char **paths, int num_paths, char **path)
 608 {
 609         int i;
 610         acpi_status status;
 611
 612         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 613                 name);
 614
 615         for (i = 0; i < num_paths; i++) {
 616                 status = acpi_get_handle(parent, paths[i], handle);
 617                 if (ACPI_SUCCESS(status)) {
 618                         *path = paths[i];
 619                         dbg_printk(TPACPI_DBG_INIT,
 620                                    "Found ACPI handle %s for %s\n",
 621                                    *path, name);
 622                         return;
 623                 }
 624         }
 625
 626         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 627                     name);
 628         *handle = NULL;
 629 }
 630
 631 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 632 {
 633         struct ibm_struct *ibm = data;
 634
 635         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 636                 return;
 637
 638         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 639                 return;
 640
 641         ibm->acpi->notify(ibm, event);
 642 }
 643
 644 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 645 {
 646         acpi_status status;
 647         int rc;
 648
 649         BUG_ON(!ibm->acpi);
 650
 651         if (!*ibm->acpi->handle)
 652                 return 0;
 653
 654         vdbg_printk(TPACPI_DBG_INIT,
 655                 "setting up ACPI notify for %s\n", ibm->name);
 656
 657         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 658         if (rc < 0) {
 659                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 660                         ibm->name, rc);
 661                 return -ENODEV;
 662         }
 663
 664         ibm->acpi->device->driver_data = ibm;
 665         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 666                 TPACPI_ACPI_EVENT_PREFIX,
 667                 ibm->name);
 668
 669         status = acpi_install_notify_handler(*ibm->acpi->handle,
 670                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 671         if (ACPI_FAILURE(status)) {
 672                 if (status == AE_ALREADY_EXISTS) {
 673                         printk(TPACPI_NOTICE
 674                                "another device driver is already "
 675                                "handling %s events\n", ibm->name);
 676                 } else {
 677                         printk(TPACPI_ERR
 678                                "acpi_install_notify_handler(%s) failed: %d\n",
 679                                ibm->name, status);
 680                 }
 681                 return -ENODEV;
 682         }
 683         ibm->flags.acpi_notify_installed = 1;
 684         return 0;
 685 }
 686
 687 static int __init tpacpi_device_add(struct acpi_device *device)
 688 {
 689         return 0;
 690 }
 691
 692 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 693 {
 694         int rc;
 695
 696         dbg_printk(TPACPI_DBG_INIT,
 697                 "registering %s as an ACPI driver\n", ibm->name);
 698
 699         BUG_ON(!ibm->acpi);
 700
 701         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 702         if (!ibm->acpi->driver) {
 703                 printk(TPACPI_ERR
 704                        "failed to allocate memory for ibm->acpi->driver\n");
 705                 return -ENOMEM;
 706         }
 707
 708         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 709         ibm->acpi->driver->ids = ibm->acpi->hid;
 710
 711         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 712
 713         rc = acpi_bus_register_driver(ibm->acpi->driver);
 714         if (rc < 0) {
 715                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 716                        ibm->name, rc);
 717                 kfree(ibm->acpi->driver);
 718                 ibm->acpi->driver = NULL;
 719         } else if (!rc)
 720                 ibm->flags.acpi_driver_registered = 1;
 721
 722         return rc;
 723 }
 724
 725
 726 /****************************************************************************
 727  ****************************************************************************
 728  *
 729  * Procfs Helpers
 730  *
 731  ****************************************************************************
 732  ****************************************************************************/
 733
 734 static int dispatch_procfs_read(char *page, char **start, off_t off,
 735                         int count, int *eof, void *data)
 736 {
 737         struct ibm_struct *ibm = data;
 738         int len;
 739
 740         if (!ibm || !ibm->read)
 741                 return -EINVAL;
 742
 743         len = ibm->read(page);
 744         if (len < 0)
 745                 return len;
 746
 747         if (len <= off + count)
 748                 *eof = 1;
 749         *start = page + off;
 750         len -= off;
 751         if (len > count)
 752                 len = count;
 753         if (len < 0)
 754                 len = 0;
 755
 756         return len;
 757 }
 758
 759 static int dispatch_procfs_write(struct file *file,
 760                         const char __user *userbuf,
 761                         unsigned long count, void *data)
 762 {
 763         struct ibm_struct *ibm = data;
 764         char *kernbuf;
 765         int ret;
 766
 767         if (!ibm || !ibm->write)
 768                 return -EINVAL;
 769         if (count > PAGE_SIZE - 2)
 770                 return -EINVAL;
 771
 772         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 773         if (!kernbuf)
 774                 return -ENOMEM;
 775
 776         if (copy_from_user(kernbuf, userbuf, count)) {
 777                 kfree(kernbuf);
 778                 return -EFAULT;
 779         }
 780
 781         kernbuf[count] = 0;
 782         strcat(kernbuf, ",");
 783         ret = ibm->write(kernbuf);
 784         if (ret == 0)
 785                 ret = count;
 786
 787         kfree(kernbuf);
 788
 789         return ret;
 790 }
 791
 792 static char *next_cmd(char **cmds)
 793 {
 794         char *start = *cmds;
 795         char *end;
 796
 797         while ((end = strchr(start, ',')) && end == start)
 798                 start = end + 1;
 799
 800         if (!end)
 801                 return NULL;
 802
 803         *end = 0;
 804         *cmds = end + 1;
 805         return start;
 806 }
 807
 808
 809 /****************************************************************************
 810  ****************************************************************************
 811  *
 812  * Device model: input, hwmon and platform
 813  *
 814  ****************************************************************************
 815  ****************************************************************************/
 816
 817 static struct platform_device *tpacpi_pdev;
 818 static struct platform_device *tpacpi_sensors_pdev;
 819 static struct device *tpacpi_hwmon;
 820 static struct input_dev *tpacpi_inputdev;
 821 static struct mutex tpacpi_inputdev_send_mutex;
 822 static LIST_HEAD(tpacpi_all_drivers);
 823
 824 static int tpacpi_suspend_handler(struct platform_device *pdev,
 825                                   pm_message_t state)
 826 {
 827         struct ibm_struct *ibm, *itmp;
 828
 829         list_for_each_entry_safe(ibm, itmp,
 830                                  &tpacpi_all_drivers,
 831                                  all_drivers) {
 832                 if (ibm->suspend)
 833                         (ibm->suspend)(state);
 834         }
 835
 836         return 0;
 837 }
 838
 839 static int tpacpi_resume_handler(struct platform_device *pdev)
 840 {
 841         struct ibm_struct *ibm, *itmp;
 842
 843         list_for_each_entry_safe(ibm, itmp,
 844                                  &tpacpi_all_drivers,
 845                                  all_drivers) {
 846                 if (ibm->resume)
 847                         (ibm->resume)();
 848         }
 849
 850         return 0;
 851 }
 852
 853 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 854 {
 855         struct ibm_struct *ibm, *itmp;
 856
 857         list_for_each_entry_safe(ibm, itmp,
 858                                  &tpacpi_all_drivers,
 859                                  all_drivers) {
 860                 if (ibm->shutdown)
 861                         (ibm->shutdown)();
 862         }
 863 }
 864
 865 static struct platform_driver tpacpi_pdriver = {
 866         .driver = {
 867                 .name = TPACPI_DRVR_NAME,
 868                 .owner = THIS_MODULE,
 869         },
 870         .suspend = tpacpi_suspend_handler,
 871         .resume = tpacpi_resume_handler,
 872         .shutdown = tpacpi_shutdown_handler,
 873 };
 874
 875 static struct platform_driver tpacpi_hwmon_pdriver = {
 876         .driver = {
 877                 .name = TPACPI_HWMON_DRVR_NAME,
 878                 .owner = THIS_MODULE,
 879         },
 880 };
 881
 882 /*************************************************************************
 883  * sysfs support helpers
 884  */
 885
 886 struct attribute_set {
 887         unsigned int members, max_members;
 888         struct attribute_group group;
 889 };
 890
 891 struct attribute_set_obj {
 892         struct attribute_set s;
 893         struct attribute *a;
 894 } __attribute__((packed));
 895
 896 static struct attribute_set *create_attr_set(unsigned int max_members,
 897                                                 const char *name)
 898 {
 899         struct attribute_set_obj *sobj;
 900
 901         if (max_members == 0)
 902                 return NULL;
 903
 904         /* Allocates space for implicit NULL at the end too */
 905         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 906                     max_members * sizeof(struct attribute *),
 907                     GFP_KERNEL);
 908         if (!sobj)
 909                 return NULL;
 910         sobj->s.max_members = max_members;
 911         sobj->s.group.attrs = &sobj->a;
 912         sobj->s.group.name = name;
 913
 914         return &sobj->s;
 915 }
 916
 917 #define destroy_attr_set(_set) \
 918         kfree(_set);
 919
 920 /* not multi-threaded safe, use it in a single thread per set */
 921 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 922 {
 923         if (!s || !attr)
 924                 return -EINVAL;
 925
 926         if (s->members >= s->max_members)
 927                 return -ENOMEM;
 928
 929         s->group.attrs[s->members] = attr;
 930         s->members++;
 931
 932         return 0;
 933 }
 934
 935 static int add_many_to_attr_set(struct attribute_set *s,
 936                         struct attribute **attr,
 937                         unsigned int count)
 938 {
 939         int i, res;
 940
 941         for (i = 0; i < count; i++) {
 942                 res = add_to_attr_set(s, attr[i]);
 943                 if (res)
 944                         return res;
 945         }
 946
 947         return 0;
 948 }
 949
 950 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 951 {
 952         sysfs_remove_group(kobj, &s->group);
 953         destroy_attr_set(s);
 954 }
 955
 956 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 957         sysfs_create_group(_kobj, &_attr_set->group)
 958
 959 static int parse_strtoul(const char *buf,
 960                 unsigned long max, unsigned long *value)
 961 {
 962         char *endp;
 963
 964         while (*buf && isspace(*buf))
 965                 buf++;
 966         *value = simple_strtoul(buf, &endp, 0);
 967         while (*endp && isspace(*endp))
 968                 endp++;
 969         if (*endp || *value > max)
 970                 return -EINVAL;
 971
 972         return 0;
 973 }
 974
 975 static void tpacpi_disable_brightness_delay(void)
 976 {
 977         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 978                 printk(TPACPI_NOTICE
 979                         "ACPI backlight control delay disabled\n");
 980 }
 981
 982 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 983 {
 984         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 985         union acpi_object *obj;
 986         int rc;
 987
 988         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 989                 obj = (union acpi_object *)buffer.pointer;
 990                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 991                         printk(TPACPI_ERR "Unknown _BCL data, "
 992                                "please report this to %s\n", TPACPI_MAIL);
 993                         rc = 0;
 994                 } else {
 995                         rc = obj->package.count;
 996                 }
 997         } else {
 998                 return 0;
 999         }
1000
1001         kfree(buffer.pointer);
1002         return rc;
1003 }
1004
1005 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1006                                         u32 lvl, void *context, void **rv)
1007 {
1008         char name[ACPI_PATH_SEGMENT_LENGTH];
1009         struct acpi_buffer buffer = { sizeof(name), &name };
1010
1011         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1012             !strncmp("_BCL", name, sizeof(name) - 1)) {
1013                 BUG_ON(!rv || !*rv);
1014                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1015                 return AE_CTRL_TERMINATE;
1016         } else {
1017                 return AE_OK;
1018         }
1019 }
1020
1021 /*
1022  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1023  */
1024 static int __init tpacpi_check_std_acpi_brightness_support(void)
1025 {
1026         int status;
1027         int bcl_levels = 0;
1028         void *bcl_ptr = &bcl_levels;
1029
1030         if (!vid_handle) {
1031                 TPACPI_ACPIHANDLE_INIT(vid);
1032         }
1033         if (!vid_handle)
1034                 return 0;
1035
1036         /*
1037          * Search for a _BCL method, and execute it.  This is safe on all
1038          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1039          * BIOS in ACPI backlight control mode.  We do NOT have to care
1040          * about calling the _BCL method in an enabled video device, any
1041          * will do for our purposes.
1042          */
1043
1044         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1045                                      tpacpi_acpi_walk_find_bcl, NULL,
1046                                      &bcl_ptr);
1047
1048         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1049                 tp_features.bright_acpimode = 1;
1050                 return (bcl_levels - 2);
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void printk_deprecated_attribute(const char * const what,
1057                                         const char * const details)
1058 {
1059         tpacpi_log_usertask("deprecated sysfs attribute");
1060         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1061                 "will be removed. %s\n",
1062                 what, details);
1063 }
1064
1065 /*************************************************************************
1066  * rfkill and radio control support helpers
1067  */
1068
1069 /*
1070  * ThinkPad-ACPI firmware handling model:
1071  *
1072  * WLSW (master wireless switch) is event-driven, and is common to all
1073  * firmware-controlled radios.  It cannot be controlled, just monitored,
1074  * as expected.  It overrides all radio state in firmware
1075  *
1076  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1077  * (TODO: verify how WLSW interacts with the returned radio state).
1078  *
1079  * The only time there are shadow radio state changes, is when
1080  * masked-off hotkeys are used.
1081  */
1082
1083 /*
1084  * Internal driver API for radio state:
1085  *
1086  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1087  * bool: true means radio blocked (off)
1088  */
1089 enum tpacpi_rfkill_state {
1090         TPACPI_RFK_RADIO_OFF = 0,
1091         TPACPI_RFK_RADIO_ON
1092 };
1093
1094 /* rfkill switches */
1095 enum tpacpi_rfk_id {
1096         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1097         TPACPI_RFK_WWAN_SW_ID,
1098         TPACPI_RFK_UWB_SW_ID,
1099         TPACPI_RFK_SW_MAX
1100 };
1101
1102 static const char *tpacpi_rfkill_names[] = {
1103         [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1104         [TPACPI_RFK_WWAN_SW_ID] = "wwan",
1105         [TPACPI_RFK_UWB_SW_ID] = "uwb",
1106         [TPACPI_RFK_SW_MAX] = NULL
1107 };
1108
1109 /* ThinkPad-ACPI rfkill subdriver */
1110 struct tpacpi_rfk {
1111         struct rfkill *rfkill;
1112         enum tpacpi_rfk_id id;
1113         const struct tpacpi_rfk_ops *ops;
1114 };
1115
1116 struct tpacpi_rfk_ops {
1117         /* firmware interface */
1118         int (*get_status)(void);
1119         int (*set_status)(const enum tpacpi_rfkill_state);
1120 };
1121
1122 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1123
1124 /* Query FW and update rfkill sw state for a given rfkill switch */
1125 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1126 {
1127         int status;
1128
1129         if (!tp_rfk)
1130                 return -ENODEV;
1131
1132         status = (tp_rfk->ops->get_status)();
1133         if (status < 0)
1134                 return status;
1135
1136         rfkill_set_sw_state(tp_rfk->rfkill,
1137                             (status == TPACPI_RFK_RADIO_OFF));
1138
1139         return status;
1140 }
1141
1142 /* Query FW and update rfkill sw state for all rfkill switches */
1143 static void tpacpi_rfk_update_swstate_all(void)
1144 {
1145         unsigned int i;
1146
1147         for (i = 0; i < TPACPI_RFK_SW_MAX; i++)
1148                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]);
1149 }
1150
1151 /*
1152  * Sync the HW-blocking state of all rfkill switches,
1153  * do notice it causes the rfkill core to schedule uevents
1154  */
1155 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1156 {
1157         unsigned int i;
1158         struct tpacpi_rfk *tp_rfk;
1159
1160         for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1161                 tp_rfk = tpacpi_rfkill_switches[i];
1162                 if (tp_rfk) {
1163                         if (rfkill_set_hw_state(tp_rfk->rfkill,
1164                                                 blocked)) {
1165                                 /* ignore -- we track sw block */
1166                         }
1167                 }
1168         }
1169 }
1170
1171 /* Call to get the WLSW state from the firmware */
1172 static int hotkey_get_wlsw(void);
1173
1174 /* Call to query WLSW state and update all rfkill switches */
1175 static bool tpacpi_rfk_check_hwblock_state(void)
1176 {
1177         int res = hotkey_get_wlsw();
1178         int hw_blocked;
1179
1180         /* When unknown or unsupported, we have to assume it is unblocked */
1181         if (res < 0)
1182                 return false;
1183
1184         hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1185         tpacpi_rfk_update_hwblock_state(hw_blocked);
1186
1187         return hw_blocked;
1188 }
1189
1190 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1191 {
1192         struct tpacpi_rfk *tp_rfk = data;
1193         int res;
1194
1195         dbg_printk(TPACPI_DBG_RFKILL,
1196                    "request to change radio state to %s\n",
1197                    blocked ? "blocked" : "unblocked");
1198
1199         /* try to set radio state */
1200         res = (tp_rfk->ops->set_status)(blocked ?
1201                                 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1202
1203         /* and update the rfkill core with whatever the FW really did */
1204         tpacpi_rfk_update_swstate(tp_rfk);
1205
1206         return (res < 0) ? res : 0;
1207 }
1208
1209 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1210         .set_block = tpacpi_rfk_hook_set_block,
1211 };
1212
1213 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1214                         const struct tpacpi_rfk_ops *tp_rfkops,
1215                         const enum rfkill_type rfktype,
1216                         const char *name,
1217                         const bool set_default)
1218 {
1219         struct tpacpi_rfk *atp_rfk;
1220         int res;
1221         bool sw_state = false;
1222         int sw_status;
1223
1224         BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1225
1226         atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1227         if (atp_rfk)
1228                 atp_rfk->rfkill = rfkill_alloc(name,
1229                                                 &tpacpi_pdev->dev,
1230                                                 rfktype,
1231                                                 &tpacpi_rfk_rfkill_ops,
1232                                                 atp_rfk);
1233         if (!atp_rfk || !atp_rfk->rfkill) {
1234                 printk(TPACPI_ERR
1235                         "failed to allocate memory for rfkill class\n");
1236                 kfree(atp_rfk);
1237                 return -ENOMEM;
1238         }
1239
1240         atp_rfk->id = id;
1241         atp_rfk->ops = tp_rfkops;
1242
1243         sw_status = (tp_rfkops->get_status)();
1244         if (sw_status < 0) {
1245                 printk(TPACPI_ERR
1246                         "failed to read initial state for %s, error %d\n",
1247                         name, sw_status);
1248         } else {
1249                 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1250                 if (set_default) {
1251                         /* try to keep the initial state, since we ask the
1252                          * firmware to preserve it across S5 in NVRAM */
1253                         rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1254                 }
1255         }
1256         rfkill_set_hw_state(atp_rfk->rfkill, tpacpi_rfk_check_hwblock_state());
1257
1258         res = rfkill_register(atp_rfk->rfkill);
1259         if (res < 0) {
1260                 printk(TPACPI_ERR
1261                         "failed to register %s rfkill switch: %d\n",
1262                         name, res);
1263                 rfkill_destroy(atp_rfk->rfkill);
1264                 kfree(atp_rfk);
1265                 return res;
1266         }
1267
1268         tpacpi_rfkill_switches[id] = atp_rfk;
1269         return 0;
1270 }
1271
1272 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1273 {
1274         struct tpacpi_rfk *tp_rfk;
1275
1276         BUG_ON(id >= TPACPI_RFK_SW_MAX);
1277
1278         tp_rfk = tpacpi_rfkill_switches[id];
1279         if (tp_rfk) {
1280                 rfkill_unregister(tp_rfk->rfkill);
1281                 tpacpi_rfkill_switches[id] = NULL;
1282                 kfree(tp_rfk);
1283         }
1284 }
1285
1286 static void printk_deprecated_rfkill_attribute(const char * const what)
1287 {
1288         printk_deprecated_attribute(what,
1289                         "Please switch to generic rfkill before year 2010");
1290 }
1291
1292 /* sysfs <radio> enable ------------------------------------------------ */
1293 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1294                                             struct device_attribute *attr,
1295                                             char *buf)
1296 {
1297         int status;
1298
1299         printk_deprecated_rfkill_attribute(attr->attr.name);
1300
1301         /* This is in the ABI... */
1302         if (tpacpi_rfk_check_hwblock_state()) {
1303                 status = TPACPI_RFK_RADIO_OFF;
1304         } else {
1305                 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1306                 if (status < 0)
1307                         return status;
1308         }
1309
1310         return snprintf(buf, PAGE_SIZE, "%d\n",
1311                         (status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1312 }
1313
1314 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1315                             struct device_attribute *attr,
1316                             const char *buf, size_t count)
1317 {
1318         unsigned long t;
1319         int res;
1320
1321         printk_deprecated_rfkill_attribute(attr->attr.name);
1322
1323         if (parse_strtoul(buf, 1, &t))
1324                 return -EINVAL;
1325
1326         tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1327
1328         /* This is in the ABI... */
1329         if (tpacpi_rfk_check_hwblock_state() && !!t)
1330                 return -EPERM;
1331
1332         res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1333                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1334         tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1335
1336         return (res < 0) ? res : count;
1337 }
1338
1339 /* procfs -------------------------------------------------------------- */
1340 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, char *p)
1341 {
1342         int len = 0;
1343
1344         if (id >= TPACPI_RFK_SW_MAX)
1345                 len += sprintf(p + len, "status:\t\tnot supported\n");
1346         else {
1347                 int status;
1348
1349                 /* This is in the ABI... */
1350                 if (tpacpi_rfk_check_hwblock_state()) {
1351                         status = TPACPI_RFK_RADIO_OFF;
1352                 } else {
1353                         status = tpacpi_rfk_update_swstate(
1354                                                 tpacpi_rfkill_switches[id]);
1355                         if (status < 0)
1356                                 return status;
1357                 }
1358
1359                 len += sprintf(p + len, "status:\t\t%s\n",
1360                                 (status == TPACPI_RFK_RADIO_ON) ?
1361                                         "enabled" : "disabled");
1362                 len += sprintf(p + len, "commands:\tenable, disable\n");
1363         }
1364
1365         return len;
1366 }
1367
1368 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1369 {
1370         char *cmd;
1371         int status = -1;
1372         int res = 0;
1373
1374         if (id >= TPACPI_RFK_SW_MAX)
1375                 return -ENODEV;
1376
1377         while ((cmd = next_cmd(&buf))) {
1378                 if (strlencmp(cmd, "enable") == 0)
1379                         status = TPACPI_RFK_RADIO_ON;
1380                 else if (strlencmp(cmd, "disable") == 0)
1381                         status = TPACPI_RFK_RADIO_OFF;
1382                 else
1383                         return -EINVAL;
1384         }
1385
1386         if (status != -1) {
1387                 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1388                                 (status == TPACPI_RFK_RADIO_ON) ?
1389                                                 "enable" : "disable",
1390                                 tpacpi_rfkill_names[id]);
1391                 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1392                 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1393         }
1394
1395         return res;
1396 }
1397
1398 /*************************************************************************
1399  * thinkpad-acpi driver attributes
1400  */
1401
1402 /* interface_version --------------------------------------------------- */
1403 static ssize_t tpacpi_driver_interface_version_show(
1404                                 struct device_driver *drv,
1405                                 char *buf)
1406 {
1407         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1408 }
1409
1410 static DRIVER_ATTR(interface_version, S_IRUGO,
1411                 tpacpi_driver_interface_version_show, NULL);
1412
1413 /* debug_level --------------------------------------------------------- */
1414 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1415                                                 char *buf)
1416 {
1417         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1418 }
1419
1420 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1421                                                 const char *buf, size_t count)
1422 {
1423         unsigned long t;
1424
1425         if (parse_strtoul(buf, 0xffff, &t))
1426                 return -EINVAL;
1427
1428         dbg_level = t;
1429
1430         return count;
1431 }
1432
1433 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1434                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1435
1436 /* version ------------------------------------------------------------- */
1437 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1438                                                 char *buf)
1439 {
1440         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1441                         TPACPI_DESC, TPACPI_VERSION);
1442 }
1443
1444 static DRIVER_ATTR(version, S_IRUGO,
1445                 tpacpi_driver_version_show, NULL);
1446
1447 /* --------------------------------------------------------------------- */
1448
1449 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1450
1451 /* wlsw_emulstate ------------------------------------------------------ */
1452 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1453                                                 char *buf)
1454 {
1455         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1456 }
1457
1458 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1459                                                 const char *buf, size_t count)
1460 {
1461         unsigned long t;
1462
1463         if (parse_strtoul(buf, 1, &t))
1464                 return -EINVAL;
1465
1466         if (tpacpi_wlsw_emulstate != !!t) {
1467                 tpacpi_wlsw_emulstate = !!t;
1468                 tpacpi_rfk_update_hwblock_state(!t);    /* negative logic */
1469         }
1470
1471         return count;
1472 }
1473
1474 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1475                 tpacpi_driver_wlsw_emulstate_show,
1476                 tpacpi_driver_wlsw_emulstate_store);
1477
1478 /* bluetooth_emulstate ------------------------------------------------- */
1479 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1480                                         struct device_driver *drv,
1481                                         char *buf)
1482 {
1483         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1484 }
1485
1486 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1487                                         struct device_driver *drv,
1488                                         const char *buf, size_t count)
1489 {
1490         unsigned long t;
1491
1492         if (parse_strtoul(buf, 1, &t))
1493                 return -EINVAL;
1494
1495         tpacpi_bluetooth_emulstate = !!t;
1496
1497         return count;
1498 }
1499
1500 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1501                 tpacpi_driver_bluetooth_emulstate_show,
1502                 tpacpi_driver_bluetooth_emulstate_store);
1503
1504 /* wwan_emulstate ------------------------------------------------- */
1505 static ssize_t tpacpi_driver_wwan_emulstate_show(
1506                                         struct device_driver *drv,
1507                                         char *buf)
1508 {
1509         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1510 }
1511
1512 static ssize_t tpacpi_driver_wwan_emulstate_store(
1513                                         struct device_driver *drv,
1514                                         const char *buf, size_t count)
1515 {
1516         unsigned long t;
1517
1518         if (parse_strtoul(buf, 1, &t))
1519                 return -EINVAL;
1520
1521         tpacpi_wwan_emulstate = !!t;
1522
1523         return count;
1524 }
1525
1526 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1527                 tpacpi_driver_wwan_emulstate_show,
1528                 tpacpi_driver_wwan_emulstate_store);
1529
1530 /* uwb_emulstate ------------------------------------------------- */
1531 static ssize_t tpacpi_driver_uwb_emulstate_show(
1532                                         struct device_driver *drv,
1533                                         char *buf)
1534 {
1535         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1536 }
1537
1538 static ssize_t tpacpi_driver_uwb_emulstate_store(
1539                                         struct device_driver *drv,
1540                                         const char *buf, size_t count)
1541 {
1542         unsigned long t;
1543
1544         if (parse_strtoul(buf, 1, &t))
1545                 return -EINVAL;
1546
1547         tpacpi_uwb_emulstate = !!t;
1548
1549         return count;
1550 }
1551
1552 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1553                 tpacpi_driver_uwb_emulstate_show,
1554                 tpacpi_driver_uwb_emulstate_store);
1555 #endif
1556
1557 /* --------------------------------------------------------------------- */
1558
1559 static struct driver_attribute *tpacpi_driver_attributes[] = {
1560         &driver_attr_debug_level, &driver_attr_version,
1561         &driver_attr_interface_version,
1562 };
1563
1564 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1565 {
1566         int i, res;
1567
1568         i = 0;
1569         res = 0;
1570         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1571                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1572                 i++;
1573         }
1574
1575 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1576         if (!res && dbg_wlswemul)
1577                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1578         if (!res && dbg_bluetoothemul)
1579                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1580         if (!res && dbg_wwanemul)
1581                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1582         if (!res && dbg_uwbemul)
1583                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1584 #endif
1585
1586         return res;
1587 }
1588
1589 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1590 {
1591         int i;
1592
1593         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1594                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1595
1596 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1597         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1598         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1599         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1600         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1601 #endif
1602 }
1603
1604 /*************************************************************************
1605  * Firmware Data
1606  */
1607
1608 /*
1609  * Table of recommended minimum BIOS versions
1610  *
1611  * Reasons for listing:
1612  *    1. Stable BIOS, listed because the unknown ammount of
1613  *       bugs and bad ACPI behaviour on older versions
1614  *
1615  *    2. BIOS or EC fw with known bugs that trigger on Linux
1616  *
1617  *    3. BIOS with known reduced functionality in older versions
1618  *
1619  *  We recommend the latest BIOS and EC version.
1620  *  We only support the latest BIOS and EC fw version as a rule.
1621  *
1622  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1623  *  Information from users in ThinkWiki
1624  *
1625  *  WARNING: we use this table also to detect that the machine is
1626  *  a ThinkPad in some cases, so don't remove entries lightly.
1627  */
1628
1629 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)          \
1630         { .vendor       = (__v),                        \
1631           .bios         = TPID(__id1, __id2),           \
1632           .ec           = TPACPI_MATCH_ANY,             \
1633           .quirks       = TPACPI_MATCH_ANY << 16        \
1634                           | (__bv1) << 8 | (__bv2) }
1635
1636 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,      \
1637                 __eid1, __eid2, __ev1, __ev2)           \
1638         { .vendor       = (__v),                        \
1639           .bios         = TPID(__bid1, __bid2),         \
1640           .ec           = TPID(__eid1, __eid2),         \
1641           .quirks       = (__ev1) << 24 | (__ev2) << 16 \
1642                           | (__bv1) << 8 | (__bv2) }
1643
1644 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1645         TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1646
1647 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1648         TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2,        \
1649                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1650
1651 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,           \
1652                 __eid1, __eid2, __ev1, __ev2)           \
1653         TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2,      \
1654                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1655
1656 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1657         TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1658
1659 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1660         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2,     \
1661                 __bv1, __bv2, __id1, __id2, __ev1, __ev2)
1662
1663 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,           \
1664                 __eid1, __eid2, __ev1, __ev2)           \
1665         TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2,   \
1666                 __bv1, __bv2, __eid1, __eid2, __ev1, __ev2)
1667
1668 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1669         /*  Numeric models ------------------ */
1670         /*      FW MODEL   BIOS VERS          */
1671         TPV_QI0('I', 'M',  '6', '5'),            /* 570 */
1672         TPV_QI0('I', 'U',  '2', '6'),            /* 570E */
1673         TPV_QI0('I', 'B',  '5', '4'),            /* 600 */
1674         TPV_QI0('I', 'H',  '4', '7'),            /* 600E */
1675         TPV_QI0('I', 'N',  '3', '6'),            /* 600E */
1676         TPV_QI0('I', 'T',  '5', '5'),            /* 600X */
1677         TPV_QI0('I', 'D',  '4', '8'),            /* 770, 770E, 770ED */
1678         TPV_QI0('I', 'I',  '4', '2'),            /* 770X */
1679         TPV_QI0('I', 'O',  '2', '3'),            /* 770Z */
1680
1681         /* A-series ------------------------- */
1682         /*      FW MODEL   BIOS VERS  EC VERS */
1683         TPV_QI0('I', 'W',  '5', '9'),            /* A20m */
1684         TPV_QI0('I', 'V',  '6', '9'),            /* A20p */
1685         TPV_QI0('1', '0',  '2', '6'),            /* A21e, A22e */
1686         TPV_QI0('K', 'U',  '3', '6'),            /* A21e */
1687         TPV_QI0('K', 'X',  '3', '6'),            /* A21m, A22m */
1688         TPV_QI0('K', 'Y',  '3', '8'),            /* A21p, A22p */
1689         TPV_QI0('1', 'B',  '1', '7'),            /* A22e */
1690         TPV_QI0('1', '3',  '2', '0'),            /* A22m */
1691         TPV_QI0('1', 'E',  '7', '3'),            /* A30/p (0) */
1692         TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1693         TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1694
1695         /* G-series ------------------------- */
1696         /*      FW MODEL   BIOS VERS          */
1697         TPV_QI0('1', 'T',  'A', '6'),            /* G40 */
1698         TPV_QI0('1', 'X',  '5', '7'),            /* G41 */
1699
1700         /* R-series, T-series --------------- */
1701         /*      FW MODEL   BIOS VERS  EC VERS */
1702         TPV_QI0('1', 'C',  'F', '0'),            /* R30 */
1703         TPV_QI0('1', 'F',  'F', '1'),            /* R31 */
1704         TPV_QI0('1', 'M',  '9', '7'),            /* R32 */
1705         TPV_QI0('1', 'O',  '6', '1'),            /* R40 */
1706         TPV_QI0('1', 'P',  '6', '5'),            /* R40 */
1707         TPV_QI0('1', 'S',  '7', '0'),            /* R40e */
1708         TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1709                                                     T40/p, T41/p, T42/p (1) */
1710         TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1711         TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1712         TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1713         TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1714
1715         TPV_QI0('I', 'Y',  '6', '1'),            /* T20 */
1716         TPV_QI0('K', 'Z',  '3', '4'),            /* T21 */
1717         TPV_QI0('1', '6',  '3', '2'),            /* T22 */
1718         TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1719         TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1720         TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1721
1722         TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1723         TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1724         TPV_QL0('7', 'E',  'D', '0'),            /* R60e, R60i */
1725
1726         /*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1727         TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1728         TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1729
1730         /* X-series ------------------------- */
1731         /*      FW MODEL   BIOS VERS  EC VERS */
1732         TPV_QI0('I', 'Z',  '9', 'D'),            /* X20, X21 */
1733         TPV_QI0('1', 'D',  '7', '0'),            /* X22, X23, X24 */
1734         TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1735         TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1736         TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1737         TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1738         TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1739
1740         TPV_QL0('7', 'B',  'D', '7'),            /* X60/s */
1741         TPV_QL0('7', 'J',  '3', '0'),            /* X60t */
1742
1743         /* (0) - older versions lack DMI EC fw string and functionality */
1744         /* (1) - older versions known to lack functionality */
1745 };
1746
1747 #undef TPV_QL1
1748 #undef TPV_QL0
1749 #undef TPV_QI2
1750 #undef TPV_QI1
1751 #undef TPV_QI0
1752 #undef TPV_Q_X
1753 #undef TPV_Q
1754
1755 static void __init tpacpi_check_outdated_fw(void)
1756 {
1757         unsigned long fwvers;
1758         u16 ec_version, bios_version;
1759
1760         fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1761                                 ARRAY_SIZE(tpacpi_bios_version_qtable));
1762
1763         if (!fwvers)
1764                 return;
1765
1766         bios_version = fwvers & 0xffffU;
1767         ec_version = (fwvers >> 16) & 0xffffU;
1768
1769         /* note that unknown versions are set to 0x0000 and we use that */
1770         if ((bios_version > thinkpad_id.bios_release) ||
1771             (ec_version > thinkpad_id.ec_release &&
1772                                 ec_version != TPACPI_MATCH_ANY)) {
1773                 /*
1774                  * The changelogs would let us track down the exact
1775                  * reason, but it is just too much of a pain to track
1776                  * it.  We only list BIOSes that are either really
1777                  * broken, or really stable to begin with, so it is
1778                  * best if the user upgrades the firmware anyway.
1779                  */
1780                 printk(TPACPI_WARN
1781                         "WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1782                 printk(TPACPI_WARN
1783                         "WARNING: This firmware may be missing critical bug "
1784                         "fixes and/or important features\n");
1785         }
1786 }
1787
1788 static bool __init tpacpi_is_fw_known(void)
1789 {
1790         return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1791                         ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1792 }
1793
1794 /****************************************************************************
1795  ****************************************************************************
1796  *
1797  * Subdrivers
1798  *
1799  ****************************************************************************
1800  ****************************************************************************/
1801
1802 /*************************************************************************
1803  * thinkpad-acpi init subdriver
1804  */
1805
1806 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1807 {
1808         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1809         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1810
1811         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1812                 (thinkpad_id.bios_version_str) ?
1813                         thinkpad_id.bios_version_str : "unknown",
1814                 (thinkpad_id.ec_version_str) ?
1815                         thinkpad_id.ec_version_str : "unknown");
1816
1817         if (thinkpad_id.vendor && thinkpad_id.model_str)
1818                 printk(TPACPI_INFO "%s %s, model %s\n",
1819                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1820                                 "IBM" : ((thinkpad_id.vendor ==
1821                                                 PCI_VENDOR_ID_LENOVO) ?
1822                                         "Lenovo" : "Unknown vendor"),
1823                         thinkpad_id.model_str,
1824                         (thinkpad_id.nummodel_str) ?
1825                                 thinkpad_id.nummodel_str : "unknown");
1826
1827         tpacpi_check_outdated_fw();
1828         return 0;
1829 }
1830
1831 static int thinkpad_acpi_driver_read(char *p)
1832 {
1833         int len = 0;
1834
1835         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1836         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1837
1838         return len;
1839 }
1840
1841 static struct ibm_struct thinkpad_acpi_driver_data = {
1842         .name = "driver",
1843         .read = thinkpad_acpi_driver_read,
1844 };
1845
1846 /*************************************************************************
1847  * Hotkey subdriver
1848  */
1849
1850 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1851         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1852         TP_ACPI_HOTKEYSCAN_FNF2,
1853         TP_ACPI_HOTKEYSCAN_FNF3,
1854         TP_ACPI_HOTKEYSCAN_FNF4,
1855         TP_ACPI_HOTKEYSCAN_FNF5,
1856         TP_ACPI_HOTKEYSCAN_FNF6,
1857         TP_ACPI_HOTKEYSCAN_FNF7,
1858         TP_ACPI_HOTKEYSCAN_FNF8,
1859         TP_ACPI_HOTKEYSCAN_FNF9,
1860         TP_ACPI_HOTKEYSCAN_FNF10,
1861         TP_ACPI_HOTKEYSCAN_FNF11,
1862         TP_ACPI_HOTKEYSCAN_FNF12,
1863         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1864         TP_ACPI_HOTKEYSCAN_FNINSERT,
1865         TP_ACPI_HOTKEYSCAN_FNDELETE,
1866         TP_ACPI_HOTKEYSCAN_FNHOME,
1867         TP_ACPI_HOTKEYSCAN_FNEND,
1868         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1869         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1870         TP_ACPI_HOTKEYSCAN_FNSPACE,
1871         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1872         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1873         TP_ACPI_HOTKEYSCAN_MUTE,
1874         TP_ACPI_HOTKEYSCAN_THINKPAD,
1875 };
1876
1877 enum {  /* Keys available through NVRAM polling */
1878         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1879         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1880 };
1881
1882 enum {  /* Positions of some of the keys in hotkey masks */
1883         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1884         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1885         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1886         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1887         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1888         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1889         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1890         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1891         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1892         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1893         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1894 };
1895
1896 enum {  /* NVRAM to ACPI HKEY group map */
1897         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1898                                           TP_ACPI_HKEY_ZOOM_MASK |
1899                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1900                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1901         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1902                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1903         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1904                                           TP_ACPI_HKEY_VOLDWN_MASK |
1905                                           TP_ACPI_HKEY_MUTE_MASK,
1906 };
1907
1908 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1909 struct tp_nvram_state {
1910        u16 thinkpad_toggle:1;
1911        u16 zoom_toggle:1;
1912        u16 display_toggle:1;
1913        u16 thinklight_toggle:1;
1914        u16 hibernate_toggle:1;
1915        u16 displayexp_toggle:1;
1916        u16 display_state:1;
1917        u16 brightness_toggle:1;
1918        u16 volume_toggle:1;
1919        u16 mute:1;
1920
1921        u8 brightness_level;
1922        u8 volume_level;
1923 };
1924
1925 /* kthread for the hotkey poller */
1926 static struct task_struct *tpacpi_hotkey_task;
1927
1928 /* Acquired while the poller kthread is running, use to sync start/stop */
1929 static struct mutex hotkey_thread_mutex;
1930
1931 /*
1932  * Acquire mutex to write poller control variables.
1933  * Increment hotkey_config_change when changing them.
1934  *
1935  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1936  */
1937 static struct mutex hotkey_thread_data_mutex;
1938 static unsigned int hotkey_config_change;
1939
1940 /*
1941  * hotkey poller control variables
1942  *
1943  * Must be atomic or readers will also need to acquire mutex
1944  */
1945 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1946 static unsigned int hotkey_poll_freq = 10; /* Hz */
1947
1948 #define HOTKEY_CONFIG_CRITICAL_START \
1949         do { \
1950                 mutex_lock(&hotkey_thread_data_mutex); \
1951                 hotkey_config_change++; \
1952         } while (0);
1953 #define HOTKEY_CONFIG_CRITICAL_END \
1954         mutex_unlock(&hotkey_thread_data_mutex);
1955
1956 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1957
1958 #define hotkey_source_mask 0U
1959 #define HOTKEY_CONFIG_CRITICAL_START
1960 #define HOTKEY_CONFIG_CRITICAL_END
1961
1962 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1963
1964 static struct mutex hotkey_mutex;
1965
1966 static enum {   /* Reasons for waking up */
1967         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1968         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1969         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1970 } hotkey_wakeup_reason;
1971
1972 static int hotkey_autosleep_ack;
1973
1974 static u32 hotkey_orig_mask;
1975 static u32 hotkey_all_mask;
1976 static u32 hotkey_reserved_mask;
1977 static u32 hotkey_mask;
1978
1979 static unsigned int hotkey_report_mode;
1980
1981 static u16 *hotkey_keycode_map;
1982
1983 static struct attribute_set *hotkey_dev_attributes;
1984
1985 /* HKEY.MHKG() return bits */
1986 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1987
1988 static int hotkey_get_wlsw(void)
1989 {
1990         int status;
1991
1992         if (!tp_features.hotkey_wlsw)
1993                 return -ENODEV;
1994
1995 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1996         if (dbg_wlswemul)
1997                 return (tpacpi_wlsw_emulstate) ?
1998                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1999 #endif
2000
2001         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
2002                 return -EIO;
2003
2004         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
2005 }
2006
2007 static int hotkey_get_tablet_mode(int *status)
2008 {
2009         int s;
2010
2011         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2012                 return -EIO;
2013
2014         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2015         return 0;
2016 }
2017
2018 /*
2019  * Call with hotkey_mutex held
2020  */
2021 static int hotkey_mask_get(void)
2022 {
2023         u32 m = 0;
2024
2025         if (tp_features.hotkey_mask) {
2026                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2027                         return -EIO;
2028         }
2029         HOTKEY_CONFIG_CRITICAL_START
2030         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2031         HOTKEY_CONFIG_CRITICAL_END
2032
2033         return 0;
2034 }
2035
2036 /*
2037  * Call with hotkey_mutex held
2038  */
2039 static int hotkey_mask_set(u32 mask)
2040 {
2041         int i;
2042         int rc = 0;
2043
2044         if (tp_features.hotkey_mask) {
2045                 if (!tp_warned.hotkey_mask_ff &&
2046                     (mask == 0xffff || mask == 0xffffff ||
2047                      mask == 0xffffffff)) {
2048                         tp_warned.hotkey_mask_ff = 1;
2049                         printk(TPACPI_NOTICE
2050                                "setting the hotkey mask to 0x%08x is likely "
2051                                "not the best way to go about it\n", mask);
2052                         printk(TPACPI_NOTICE
2053                                "please consider using the driver defaults, "
2054                                "and refer to up-to-date thinkpad-acpi "
2055                                "documentation\n");
2056                 }
2057
2058                 HOTKEY_CONFIG_CRITICAL_START
2059                 for (i = 0; i < 32; i++) {
2060                         u32 m = 1 << i;
2061                         /* enable in firmware mask only keys not in NVRAM
2062                          * mode, but enable the key in the cached hotkey_mask
2063                          * regardless of mode, or the key will end up
2064                          * disabled by hotkey_mask_get() */
2065                         if (!acpi_evalf(hkey_handle,
2066                                         NULL, "MHKM", "vdd", i + 1,
2067                                         !!((mask & ~hotkey_source_mask) & m))) {
2068                                 rc = -EIO;
2069                                 break;
2070                         } else {
2071                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2072                         }
2073                 }
2074                 HOTKEY_CONFIG_CRITICAL_END
2075
2076                 /* hotkey_mask_get must be called unconditionally below */
2077                 if (!hotkey_mask_get() && !rc &&
2078                     (hotkey_mask & ~hotkey_source_mask) !=
2079                      (mask & ~hotkey_source_mask)) {
2080                         printk(TPACPI_NOTICE
2081                                "requested hot key mask 0x%08x, but "
2082                                "firmware forced it to 0x%08x\n",
2083                                mask, hotkey_mask);
2084                 }
2085         } else {
2086 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2087                 HOTKEY_CONFIG_CRITICAL_START
2088                 hotkey_mask = mask & hotkey_source_mask;
2089                 HOTKEY_CONFIG_CRITICAL_END
2090                 hotkey_mask_get();
2091                 if (hotkey_mask != mask) {
2092                         printk(TPACPI_NOTICE
2093                                "requested hot key mask 0x%08x, "
2094                                "forced to 0x%08x (NVRAM poll mask is "
2095                                "0x%08x): no firmware mask support\n",
2096                                mask, hotkey_mask, hotkey_source_mask);
2097                 }
2098 #else
2099                 hotkey_mask_get();
2100                 rc = -ENXIO;
2101 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2102         }
2103
2104         return rc;
2105 }
2106
2107 static int hotkey_status_get(int *status)
2108 {
2109         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2110                 return -EIO;
2111
2112         return 0;
2113 }
2114
2115 static int hotkey_status_set(bool enable)
2116 {
2117         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2118                 return -EIO;
2119
2120         return 0;
2121 }
2122
2123 static void tpacpi_input_send_tabletsw(void)
2124 {
2125         int state;
2126
2127         if (tp_features.hotkey_tablet &&
2128             !hotkey_get_tablet_mode(&state)) {
2129                 mutex_lock(&tpacpi_inputdev_send_mutex);
2130
2131                 input_report_switch(tpacpi_inputdev,
2132                                     SW_TABLET_MODE, !!state);
2133                 input_sync(tpacpi_inputdev);
2134
2135                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2136         }
2137 }
2138
2139 static void tpacpi_input_send_key(unsigned int scancode)
2140 {
2141         unsigned int keycode;
2142
2143         keycode = hotkey_keycode_map[scancode];
2144
2145         if (keycode != KEY_RESERVED) {
2146                 mutex_lock(&tpacpi_inputdev_send_mutex);
2147
2148                 input_report_key(tpacpi_inputdev, keycode, 1);
2149                 if (keycode == KEY_UNKNOWN)
2150                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2151                                     scancode);
2152                 input_sync(tpacpi_inputdev);
2153
2154                 input_report_key(tpacpi_inputdev, keycode, 0);
2155                 if (keycode == KEY_UNKNOWN)
2156                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2157                                     scancode);
2158                 input_sync(tpacpi_inputdev);
2159
2160                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2161         }
2162 }
2163
2164 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2165 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2166
2167 static void tpacpi_hotkey_send_key(unsigned int scancode)
2168 {
2169         tpacpi_input_send_key(scancode);
2170         if (hotkey_report_mode < 2) {
2171                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2172                                                 0x80, 0x1001 + scancode);
2173         }
2174 }
2175
2176 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2177 {
2178         u8 d;
2179
2180         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2181                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2182                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2183                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2184                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2185                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2186         }
2187         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2188                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2189                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2190         }
2191         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2192                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2193                 n->displayexp_toggle =
2194                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2195         }
2196         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2197                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2198                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2199                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2200                 n->brightness_toggle =
2201                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2202         }
2203         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2204                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2205                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2206                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2207                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2208                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2209         }
2210 }
2211
2212 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2213         do { \
2214                 if ((mask & (1 << __scancode)) && \
2215                     oldn->__member != newn->__member) \
2216                 tpacpi_hotkey_send_key(__scancode); \
2217         } while (0)
2218
2219 #define TPACPI_MAY_SEND_KEY(__scancode) \
2220         do { if (mask & (1 << __scancode)) \
2221                 tpacpi_hotkey_send_key(__scancode); } while (0)
2222
2223 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2224                                            struct tp_nvram_state *newn,
2225                                            u32 mask)
2226 {
2227         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2228         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2229         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2230         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2231
2232         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2233
2234         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2235
2236         /* handle volume */
2237         if (oldn->volume_toggle != newn->volume_toggle) {
2238                 if (oldn->mute != newn->mute) {
2239                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2240                 }
2241                 if (oldn->volume_level > newn->volume_level) {
2242                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2243                 } else if (oldn->volume_level < newn->volume_level) {
2244                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2245                 } else if (oldn->mute == newn->mute) {
2246                         /* repeated key presses that didn't change state */
2247                         if (newn->mute) {
2248                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2249                         } else if (newn->volume_level != 0) {
2250                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2251                         } else {
2252                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2253                         }
2254                 }
2255         }
2256
2257         /* handle brightness */
2258         if (oldn->brightness_toggle != newn->brightness_toggle) {
2259                 if (oldn->brightness_level < newn->brightness_level) {
2260                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2261                 } else if (oldn->brightness_level > newn->brightness_level) {
2262                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2263                 } else {
2264                         /* repeated key presses that didn't change state */
2265                         if (newn->brightness_level != 0) {
2266                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2267                         } else {
2268                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2269                         }
2270                 }
2271         }
2272 }
2273
2274 #undef TPACPI_COMPARE_KEY
2275 #undef TPACPI_MAY_SEND_KEY
2276
2277 static int hotkey_kthread(void *data)
2278 {
2279         struct tp_nvram_state s[2];
2280         u32 mask;
2281         unsigned int si, so;
2282         unsigned long t;
2283         unsigned int change_detector, must_reset;
2284         unsigned int poll_freq;
2285
2286         mutex_lock(&hotkey_thread_mutex);
2287
2288         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2289                 goto exit;
2290
2291         set_freezable();
2292
2293         so = 0;
2294         si = 1;
2295         t = 0;
2296
2297         /* Initial state for compares */
2298         mutex_lock(&hotkey_thread_data_mutex);
2299         change_detector = hotkey_config_change;
2300         mask = hotkey_source_mask & hotkey_mask;
2301         poll_freq = hotkey_poll_freq;
2302         mutex_unlock(&hotkey_thread_data_mutex);
2303         hotkey_read_nvram(&s[so], mask);
2304
2305         while (!kthread_should_stop()) {
2306                 if (t == 0) {
2307                         if (likely(poll_freq))
2308                                 t = 1000/poll_freq;
2309                         else
2310                                 t = 100;        /* should never happen... */
2311                 }
2312                 t = msleep_interruptible(t);
2313                 if (unlikely(kthread_should_stop()))
2314                         break;
2315                 must_reset = try_to_freeze();
2316                 if (t > 0 && !must_reset)
2317                         continue;
2318
2319                 mutex_lock(&hotkey_thread_data_mutex);
2320                 if (must_reset || hotkey_config_change != change_detector) {
2321                         /* forget old state on thaw or config change */
2322                         si = so;
2323                         t = 0;
2324                         change_detector = hotkey_config_change;
2325                 }
2326                 mask = hotkey_source_mask & hotkey_mask;
2327                 poll_freq = hotkey_poll_freq;
2328                 mutex_unlock(&hotkey_thread_data_mutex);
2329
2330                 if (likely(mask)) {
2331                         hotkey_read_nvram(&s[si], mask);
2332                         if (likely(si != so)) {
2333                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2334                                                                 mask);
2335                         }
2336                 }
2337
2338                 so = si;
2339                 si ^= 1;
2340         }
2341
2342 exit:
2343         mutex_unlock(&hotkey_thread_mutex);
2344         return 0;
2345 }
2346
2347 /* call with hotkey_mutex held */
2348 static void hotkey_poll_stop_sync(void)
2349 {
2350         if (tpacpi_hotkey_task) {
2351                 if (frozen(tpacpi_hotkey_task) ||
2352                     freezing(tpacpi_hotkey_task))
2353                         thaw_process(tpacpi_hotkey_task);
2354
2355                 kthread_stop(tpacpi_hotkey_task);
2356                 tpacpi_hotkey_task = NULL;
2357                 mutex_lock(&hotkey_thread_mutex);
2358                 /* at this point, the thread did exit */
2359                 mutex_unlock(&hotkey_thread_mutex);
2360         }
2361 }
2362
2363 /* call with hotkey_mutex held */
2364 static void hotkey_poll_setup(bool may_warn)
2365 {
2366         u32 hotkeys_to_poll = hotkey_source_mask & hotkey_mask;
2367
2368         if (hotkeys_to_poll != 0 && hotkey_poll_freq > 0 &&
2369             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2370                 if (!tpacpi_hotkey_task) {
2371                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2372                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2373                         if (IS_ERR(tpacpi_hotkey_task)) {
2374                                 tpacpi_hotkey_task = NULL;
2375                                 printk(TPACPI_ERR
2376                                        "could not create kernel thread "
2377                                        "for hotkey polling\n");
2378                         }
2379                 }
2380         } else {
2381                 hotkey_poll_stop_sync();
2382                 if (may_warn && hotkeys_to_poll != 0 &&
2383                     hotkey_poll_freq == 0) {
2384                         printk(TPACPI_NOTICE
2385                                 "hot keys 0x%08x require polling, "
2386                                 "which is currently disabled\n",
2387                                 hotkeys_to_poll);
2388                 }
2389         }
2390 }
2391
2392 static void hotkey_poll_setup_safe(bool may_warn)
2393 {
2394         mutex_lock(&hotkey_mutex);
2395         hotkey_poll_setup(may_warn);
2396         mutex_unlock(&hotkey_mutex);
2397 }
2398
2399 /* call with hotkey_mutex held */
2400 static void hotkey_poll_set_freq(unsigned int freq)
2401 {
2402         if (!freq)
2403                 hotkey_poll_stop_sync();
2404
2405         HOTKEY_CONFIG_CRITICAL_START
2406         hotkey_poll_freq = freq;
2407         HOTKEY_CONFIG_CRITICAL_END
2408 }
2409
2410 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2411
2412 static void hotkey_poll_setup_safe(bool __unused)
2413 {
2414 }
2415
2416 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2417
2418 static int hotkey_inputdev_open(struct input_dev *dev)
2419 {
2420         switch (tpacpi_lifecycle) {
2421         case TPACPI_LIFE_INIT:
2422                 /*
2423                  * hotkey_init will call hotkey_poll_setup_safe
2424                  * at the appropriate moment
2425                  */
2426                 return 0;
2427         case TPACPI_LIFE_EXITING:
2428                 return -EBUSY;
2429         case TPACPI_LIFE_RUNNING:
2430                 hotkey_poll_setup_safe(false);
2431                 return 0;
2432         }
2433
2434         /* Should only happen if tpacpi_lifecycle is corrupt */
2435         BUG();
2436         return -EBUSY;
2437 }
2438
2439 static void hotkey_inputdev_close(struct input_dev *dev)
2440 {
2441         /* disable hotkey polling when possible */
2442         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2443                 hotkey_poll_setup_safe(false);
2444 }
2445
2446 /* sysfs hotkey enable ------------------------------------------------- */
2447 static ssize_t hotkey_enable_show(struct device *dev,
2448                            struct device_attribute *attr,
2449                            char *buf)
2450 {
2451         int res, status;
2452
2453         printk_deprecated_attribute("hotkey_enable",
2454                         "Hotkey reporting is always enabled");
2455
2456         res = hotkey_status_get(&status);
2457         if (res)
2458                 return res;
2459
2460         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2461 }
2462
2463 static ssize_t hotkey_enable_store(struct device *dev,
2464                             struct device_attribute *attr,
2465                             const char *buf, size_t count)
2466 {
2467         unsigned long t;
2468
2469         printk_deprecated_attribute("hotkey_enable",
2470                         "Hotkeys can be disabled through hotkey_mask");
2471
2472         if (parse_strtoul(buf, 1, &t))
2473                 return -EINVAL;
2474
2475         if (t == 0)
2476                 return -EPERM;
2477
2478         return count;
2479 }
2480
2481 static struct device_attribute dev_attr_hotkey_enable =
2482         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2483                 hotkey_enable_show, hotkey_enable_store);
2484
2485 /* sysfs hotkey mask --------------------------------------------------- */
2486 static ssize_t hotkey_mask_show(struct device *dev,
2487                            struct device_attribute *attr,
2488                            char *buf)
2489 {
2490         int res;
2491
2492         if (mutex_lock_killable(&hotkey_mutex))
2493                 return -ERESTARTSYS;
2494         res = hotkey_mask_get();
2495         mutex_unlock(&hotkey_mutex);
2496
2497         return (res)?
2498                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2499 }
2500
2501 static ssize_t hotkey_mask_store(struct device *dev,
2502                             struct device_attribute *attr,
2503                             const char *buf, size_t count)
2504 {
2505         unsigned long t;
2506         int res;
2507
2508         if (parse_strtoul(buf, 0xffffffffUL, &t))
2509                 return -EINVAL;
2510
2511         if (mutex_lock_killable(&hotkey_mutex))
2512                 return -ERESTARTSYS;
2513
2514         res = hotkey_mask_set(t);
2515
2516 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2517         hotkey_poll_setup(true);
2518 #endif
2519
2520         mutex_unlock(&hotkey_mutex);
2521
2522         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2523
2524         return (res) ? res : count;
2525 }
2526
2527 static struct device_attribute dev_attr_hotkey_mask =
2528         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2529                 hotkey_mask_show, hotkey_mask_store);
2530
2531 /* sysfs hotkey bios_enabled ------------------------------------------- */
2532 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2533                            struct device_attribute *attr,
2534                            char *buf)
2535 {
2536         return sprintf(buf, "0\n");
2537 }
2538
2539 static struct device_attribute dev_attr_hotkey_bios_enabled =
2540         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2541
2542 /* sysfs hotkey bios_mask ---------------------------------------------- */
2543 static ssize_t hotkey_bios_mask_show(struct device *dev,
2544                            struct device_attribute *attr,
2545                            char *buf)
2546 {
2547         printk_deprecated_attribute("hotkey_bios_mask",
2548                         "This attribute is useless.");
2549         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2550 }
2551
2552 static struct device_attribute dev_attr_hotkey_bios_mask =
2553         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2554
2555 /* sysfs hotkey all_mask ----------------------------------------------- */
2556 static ssize_t hotkey_all_mask_show(struct device *dev,
2557                            struct device_attribute *attr,
2558                            char *buf)
2559 {
2560         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2561                                 hotkey_all_mask | hotkey_source_mask);
2562 }
2563
2564 static struct device_attribute dev_attr_hotkey_all_mask =
2565         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2566
2567 /* sysfs hotkey recommended_mask --------------------------------------- */
2568 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2569                                             struct device_attribute *attr,
2570                                             char *buf)
2571 {
2572         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2573                         (hotkey_all_mask | hotkey_source_mask)
2574                         & ~hotkey_reserved_mask);
2575 }
2576
2577 static struct device_attribute dev_attr_hotkey_recommended_mask =
2578         __ATTR(hotkey_recommended_mask, S_IRUGO,
2579                 hotkey_recommended_mask_show, NULL);
2580
2581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2582
2583 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2584 static ssize_t hotkey_source_mask_show(struct device *dev,
2585                            struct device_attribute *attr,
2586                            char *buf)
2587 {
2588         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2589 }
2590
2591 static ssize_t hotkey_source_mask_store(struct device *dev,
2592                             struct device_attribute *attr,
2593                             const char *buf, size_t count)
2594 {
2595         unsigned long t;
2596
2597         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2598                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2599                 return -EINVAL;
2600
2601         if (mutex_lock_killable(&hotkey_mutex))
2602                 return -ERESTARTSYS;
2603
2604         HOTKEY_CONFIG_CRITICAL_START
2605         hotkey_source_mask = t;
2606         HOTKEY_CONFIG_CRITICAL_END
2607
2608         hotkey_poll_setup(true);
2609         hotkey_mask_set(hotkey_mask);
2610
2611         mutex_unlock(&hotkey_mutex);
2612
2613         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2614
2615         return count;
2616 }
2617
2618 static struct device_attribute dev_attr_hotkey_source_mask =
2619         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2620                 hotkey_source_mask_show, hotkey_source_mask_store);
2621
2622 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2623 static ssize_t hotkey_poll_freq_show(struct device *dev,
2624                            struct device_attribute *attr,
2625                            char *buf)
2626 {
2627         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2628 }
2629
2630 static ssize_t hotkey_poll_freq_store(struct device *dev,
2631                             struct device_attribute *attr,
2632                             const char *buf, size_t count)
2633 {
2634         unsigned long t;
2635
2636         if (parse_strtoul(buf, 25, &t))
2637                 return -EINVAL;
2638
2639         if (mutex_lock_killable(&hotkey_mutex))
2640                 return -ERESTARTSYS;
2641
2642         hotkey_poll_set_freq(t);
2643         hotkey_poll_setup(true);
2644
2645         mutex_unlock(&hotkey_mutex);
2646
2647         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2648
2649         return count;
2650 }
2651
2652 static struct device_attribute dev_attr_hotkey_poll_freq =
2653         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2654                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2655
2656 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2657
2658 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2659 static ssize_t hotkey_radio_sw_show(struct device *dev,
2660                            struct device_attribute *attr,
2661                            char *buf)
2662 {
2663         int res;
2664         res = hotkey_get_wlsw();
2665         if (res < 0)
2666                 return res;
2667
2668         /* Opportunistic update */
2669         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2670
2671         return snprintf(buf, PAGE_SIZE, "%d\n",
2672                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2673 }
2674
2675 static struct device_attribute dev_attr_hotkey_radio_sw =
2676         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2677
2678 static void hotkey_radio_sw_notify_change(void)
2679 {
2680         if (tp_features.hotkey_wlsw)
2681                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2682                              "hotkey_radio_sw");
2683 }
2684
2685 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2686 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2687                            struct device_attribute *attr,
2688                            char *buf)
2689 {
2690         int res, s;
2691         res = hotkey_get_tablet_mode(&s);
2692         if (res < 0)
2693                 return res;
2694
2695         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2696 }
2697
2698 static struct device_attribute dev_attr_hotkey_tablet_mode =
2699         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2700
2701 static void hotkey_tablet_mode_notify_change(void)
2702 {
2703         if (tp_features.hotkey_tablet)
2704                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2705                              "hotkey_tablet_mode");
2706 }
2707
2708 /* sysfs hotkey report_mode -------------------------------------------- */
2709 static ssize_t hotkey_report_mode_show(struct device *dev,
2710                            struct device_attribute *attr,
2711                            char *buf)
2712 {
2713         return snprintf(buf, PAGE_SIZE, "%d\n",
2714                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2715 }
2716
2717 static struct device_attribute dev_attr_hotkey_report_mode =
2718         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2719
2720 /* sysfs wakeup reason (pollable) -------------------------------------- */
2721 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2722                            struct device_attribute *attr,
2723                            char *buf)
2724 {
2725         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2726 }
2727
2728 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2729         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2730
2731 static void hotkey_wakeup_reason_notify_change(void)
2732 {
2733         if (tp_features.hotkey_mask)
2734                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2735                              "wakeup_reason");
2736 }
2737
2738 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2739 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2740                            struct device_attribute *attr,
2741                            char *buf)
2742 {
2743         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2744 }
2745
2746 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2747         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2748                hotkey_wakeup_hotunplug_complete_show, NULL);
2749
2750 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2751 {
2752         if (tp_features.hotkey_mask)
2753                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2754                              "wakeup_hotunplug_complete");
2755 }
2756
2757 /* --------------------------------------------------------------------- */
2758
2759 static struct attribute *hotkey_attributes[] __initdata = {
2760         &dev_attr_hotkey_enable.attr,
2761         &dev_attr_hotkey_bios_enabled.attr,
2762         &dev_attr_hotkey_report_mode.attr,
2763 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2764         &dev_attr_hotkey_mask.attr,
2765         &dev_attr_hotkey_all_mask.attr,
2766         &dev_attr_hotkey_recommended_mask.attr,
2767         &dev_attr_hotkey_source_mask.attr,
2768         &dev_attr_hotkey_poll_freq.attr,
2769 #endif
2770 };
2771
2772 static struct attribute *hotkey_mask_attributes[] __initdata = {
2773         &dev_attr_hotkey_bios_mask.attr,
2774 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2775         &dev_attr_hotkey_mask.attr,
2776         &dev_attr_hotkey_all_mask.attr,
2777         &dev_attr_hotkey_recommended_mask.attr,
2778 #endif
2779         &dev_attr_hotkey_wakeup_reason.attr,
2780         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2781 };
2782
2783 /*
2784  * Sync both the hw and sw blocking state of all switches
2785  */
2786 static void tpacpi_send_radiosw_update(void)
2787 {
2788         int wlsw;
2789
2790         /*
2791          * We must sync all rfkill controllers *before* issuing any
2792          * rfkill input events, or we will race the rfkill core input
2793          * handler.
2794          *
2795          * tpacpi_inputdev_send_mutex works as a syncronization point
2796          * for the above.
2797          *
2798          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2799          */
2800
2801         wlsw = hotkey_get_wlsw();
2802
2803         /* Sync hw blocking state first if it is hw-blocked */
2804         if (wlsw == TPACPI_RFK_RADIO_OFF)
2805                 tpacpi_rfk_update_hwblock_state(true);
2806
2807         /* Sync sw blocking state */
2808         tpacpi_rfk_update_swstate_all();
2809
2810         /* Sync hw blocking state last if it is hw-unblocked */
2811         if (wlsw == TPACPI_RFK_RADIO_ON)
2812                 tpacpi_rfk_update_hwblock_state(false);
2813
2814         /* Issue rfkill input event for WLSW switch */
2815         if (!(wlsw < 0)) {
2816                 mutex_lock(&tpacpi_inputdev_send_mutex);
2817
2818                 input_report_switch(tpacpi_inputdev,
2819                                     SW_RFKILL_ALL, (wlsw > 0));
2820                 input_sync(tpacpi_inputdev);
2821
2822                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2823         }
2824
2825         /*
2826          * this can be unconditional, as we will poll state again
2827          * if userspace uses the notify to read data
2828          */
2829         hotkey_radio_sw_notify_change();
2830 }
2831
2832 static void hotkey_exit(void)
2833 {
2834 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2835         mutex_lock(&hotkey_mutex);
2836         hotkey_poll_stop_sync();
2837         mutex_unlock(&hotkey_mutex);
2838 #endif
2839
2840         if (hotkey_dev_attributes)
2841                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2842
2843         kfree(hotkey_keycode_map);
2844
2845         if (tp_features.hotkey) {
2846                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2847                            "restoring original hot key mask\n");
2848                 /* no short-circuit boolean operator below! */
2849                 if ((hotkey_mask_set(hotkey_orig_mask) |
2850                      hotkey_status_set(false)) != 0)
2851                         printk(TPACPI_ERR
2852                                "failed to restore hot key mask "
2853                                "to BIOS defaults\n");
2854         }
2855 }
2856
2857 static int __init hotkey_init(struct ibm_init_struct *iibm)
2858 {
2859         /* Requirements for changing the default keymaps:
2860          *
2861          * 1. Many of the keys are mapped to KEY_RESERVED for very
2862          *    good reasons.  Do not change them unless you have deep
2863          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2864          *    the various ThinkPad models.  The driver behaves
2865          *    differently for KEY_RESERVED: such keys have their
2866          *    hot key mask *unset* in mask_recommended, and also
2867          *    in the initial hot key mask programmed into the
2868          *    firmware at driver load time, which means the firm-
2869          *    ware may react very differently if you change them to
2870          *    something else;
2871          *
2872          * 2. You must be subscribed to the linux-thinkpad and
2873          *    ibm-acpi-devel mailing lists, and you should read the
2874          *    list archives since 2007 if you want to change the
2875          *    keymaps.  This requirement exists so that you will
2876          *    know the past history of problems with the thinkpad-
2877          *    acpi driver keymaps, and also that you will be
2878          *    listening to any bug reports;
2879          *
2880          * 3. Do not send thinkpad-acpi specific patches directly to
2881          *    for merging, *ever*.  Send them to the linux-acpi
2882          *    mailinglist for comments.  Merging is to be done only
2883          *    through acpi-test and the ACPI maintainer.
2884          *
2885          * If the above is too much to ask, don't change the keymap.
2886          * Ask the thinkpad-acpi maintainer to do it, instead.
2887          */
2888         static u16 ibm_keycode_map[] __initdata = {
2889                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2890                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2891                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2892                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2893
2894                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2895                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2896                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2897                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2898
2899                 /* brightness: firmware always reacts to them, unless
2900                  * X.org did some tricks in the radeon BIOS scratch
2901                  * registers of *some* models */
2902                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2903                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2904
2905                 /* Thinklight: firmware always react to it */
2906                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2907
2908                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2909                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2910
2911                 /* Volume: firmware always react to it and reprograms
2912                  * the built-in *extra* mixer.  Never map it to control
2913                  * another mixer by default. */
2914                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2915                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2916                 KEY_RESERVED,   /* 0x16: MUTE */
2917
2918                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2919
2920                 /* (assignments unknown, please report if found) */
2921                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2922                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2923         };
2924         static u16 lenovo_keycode_map[] __initdata = {
2925                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2926                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2927                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2928                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2929
2930                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2931                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2932                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2933                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2934
2935                 /* These either have to go through ACPI video, or
2936                  * act like in the IBM ThinkPads, so don't ever
2937                  * enable them by default */
2938                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2939                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2940
2941                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2942
2943                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2944                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2945
2946                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2947                  * react to it and reprograms the built-in *extra* mixer.
2948                  * Never map it to control another mixer by default.
2949                  *
2950                  * T60?, T61, R60?, R61: firmware and EC tries to send
2951                  * these over the regular keyboard, so these are no-ops,
2952                  * but there are still weird bugs re. MUTE, so do not
2953                  * change unless you get test reports from all Lenovo
2954                  * models.  May cause the BIOS to interfere with the
2955                  * HDA mixer.
2956                  */
2957                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2958                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2959                 KEY_RESERVED,   /* 0x16: MUTE */
2960
2961                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2962
2963                 /* (assignments unknown, please report if found) */
2964                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2965                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2966         };
2967
2968 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2969 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2970 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2971
2972         int res, i;
2973         int status;
2974         int hkeyv;
2975
2976         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2977                         "initializing hotkey subdriver\n");
2978
2979         BUG_ON(!tpacpi_inputdev);
2980         BUG_ON(tpacpi_inputdev->open != NULL ||
2981                tpacpi_inputdev->close != NULL);
2982
2983         TPACPI_ACPIHANDLE_INIT(hkey);
2984         mutex_init(&hotkey_mutex);
2985
2986 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2987         mutex_init(&hotkey_thread_mutex);
2988         mutex_init(&hotkey_thread_data_mutex);
2989 #endif
2990
2991         /* hotkey not supported on 570 */
2992         tp_features.hotkey = hkey_handle != NULL;
2993
2994         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2995                 "hotkeys are %s\n",
2996                 str_supported(tp_features.hotkey));
2997
2998         if (!tp_features.hotkey)
2999                 return 1;
3000
3001         tpacpi_disable_brightness_delay();
3002
3003         hotkey_dev_attributes = create_attr_set(13, NULL);
3004         if (!hotkey_dev_attributes)
3005                 return -ENOMEM;
3006         res = add_many_to_attr_set(hotkey_dev_attributes,
3007                         hotkey_attributes,
3008                         ARRAY_SIZE(hotkey_attributes));
3009         if (res)
3010                 goto err_exit;
3011
3012         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3013            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3014            for HKEY interface version 0x100 */
3015         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3016                 if ((hkeyv >> 8) != 1) {
3017                         printk(TPACPI_ERR "unknown version of the "
3018                                "HKEY interface: 0x%x\n", hkeyv);
3019                         printk(TPACPI_ERR "please report this to %s\n",
3020                                TPACPI_MAIL);
3021                 } else {
3022                         /*
3023                          * MHKV 0x100 in A31, R40, R40e,
3024                          * T4x, X31, and later
3025                          */
3026                         tp_features.hotkey_mask = 1;
3027                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3028                                 "firmware HKEY interface version: 0x%x\n",
3029                                 hkeyv);
3030                 }
3031         }
3032
3033         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3034                 "hotkey masks are %s\n",
3035                 str_supported(tp_features.hotkey_mask));
3036
3037         if (tp_features.hotkey_mask) {
3038                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3039                                 "MHKA", "qd")) {
3040                         printk(TPACPI_ERR
3041                                "missing MHKA handler, "
3042                                "please report this to %s\n",
3043                                TPACPI_MAIL);
3044                         /* FN+F12, FN+F4, FN+F3 */
3045                         hotkey_all_mask = 0x080cU;
3046                 }
3047         }
3048
3049         /* hotkey_source_mask *must* be zero for
3050          * the first hotkey_mask_get */
3051         if (tp_features.hotkey_mask) {
3052                 res = hotkey_mask_get();
3053                 if (res)
3054                         goto err_exit;
3055
3056                 hotkey_orig_mask = hotkey_mask;
3057                 res = add_many_to_attr_set(
3058                                 hotkey_dev_attributes,
3059                                 hotkey_mask_attributes,
3060                                 ARRAY_SIZE(hotkey_mask_attributes));
3061                 if (res)
3062                         goto err_exit;
3063         }
3064
3065 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3066         if (tp_features.hotkey_mask) {
3067                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3068                                         & ~hotkey_all_mask;
3069         } else {
3070                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
3071         }
3072
3073         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3074                     "hotkey source mask 0x%08x, polling freq %u\n",
3075                     hotkey_source_mask, hotkey_poll_freq);
3076 #endif
3077
3078 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3079         if (dbg_wlswemul) {
3080                 tp_features.hotkey_wlsw = 1;
3081                 printk(TPACPI_INFO
3082                         "radio switch emulation enabled\n");
3083         } else
3084 #endif
3085         /* Not all thinkpads have a hardware radio switch */
3086         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3087                 tp_features.hotkey_wlsw = 1;
3088                 printk(TPACPI_INFO
3089                         "radio switch found; radios are %s\n",
3090                         enabled(status, 0));
3091         }
3092         if (tp_features.hotkey_wlsw)
3093                 res = add_to_attr_set(hotkey_dev_attributes,
3094                                 &dev_attr_hotkey_radio_sw.attr);
3095
3096         /* For X41t, X60t, X61t Tablets... */
3097         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3098                 tp_features.hotkey_tablet = 1;
3099                 printk(TPACPI_INFO
3100                         "possible tablet mode switch found; "
3101                         "ThinkPad in %s mode\n",
3102                         (status & TP_HOTKEY_TABLET_MASK)?
3103                                 "tablet" : "laptop");
3104                 res = add_to_attr_set(hotkey_dev_attributes,
3105                                 &dev_attr_hotkey_tablet_mode.attr);
3106         }
3107
3108         if (!res)
3109                 res = register_attr_set_with_sysfs(
3110                                 hotkey_dev_attributes,
3111                                 &tpacpi_pdev->dev.kobj);
3112         if (res)
3113                 goto err_exit;
3114
3115         /* Set up key map */
3116
3117         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3118                                         GFP_KERNEL);
3119         if (!hotkey_keycode_map) {
3120                 printk(TPACPI_ERR
3121                         "failed to allocate memory for key map\n");
3122                 res = -ENOMEM;
3123                 goto err_exit;
3124         }
3125
3126         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3127                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3128                            "using Lenovo default hot key map\n");
3129                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3130                         TPACPI_HOTKEY_MAP_SIZE);
3131         } else {
3132                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3133                            "using IBM default hot key map\n");
3134                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3135                         TPACPI_HOTKEY_MAP_SIZE);
3136         }
3137
3138         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3139         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3140         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3141         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3142         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3143         tpacpi_inputdev->keycode = hotkey_keycode_map;
3144         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3145                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3146                         set_bit(hotkey_keycode_map[i],
3147                                 tpacpi_inputdev->keybit);
3148                 } else {
3149                         if (i < sizeof(hotkey_reserved_mask)*8)
3150                                 hotkey_reserved_mask |= 1 << i;
3151                 }
3152         }
3153
3154         if (tp_features.hotkey_wlsw) {
3155                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3156                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3157         }
3158         if (tp_features.hotkey_tablet) {
3159                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3160                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3161         }
3162
3163         /* Do not issue duplicate brightness change events to
3164          * userspace */
3165         if (!tp_features.bright_acpimode)
3166                 /* update bright_acpimode... */
3167                 tpacpi_check_std_acpi_brightness_support();
3168
3169         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3170                 printk(TPACPI_INFO
3171                        "This ThinkPad has standard ACPI backlight "
3172                        "brightness control, supported by the ACPI "
3173                        "video driver\n");
3174                 printk(TPACPI_NOTICE
3175                        "Disabling thinkpad-acpi brightness events "
3176                        "by default...\n");
3177
3178                 /* The hotkey_reserved_mask change below is not
3179                  * necessary while the keys are at KEY_RESERVED in the
3180                  * default map, but better safe than sorry, leave it
3181                  * here as a marker of what we have to do, especially
3182                  * when we finally become able to set this at runtime
3183                  * on response to X.org requests */
3184                 hotkey_reserved_mask |=
3185                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3186                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3187         }
3188
3189         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3190                         "enabling firmware HKEY event interface...\n");
3191         res = hotkey_status_set(true);
3192         if (res) {
3193                 hotkey_exit();
3194                 return res;
3195         }
3196         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3197                                 & ~hotkey_reserved_mask)
3198                                 | hotkey_orig_mask);
3199         if (res < 0 && res != -ENXIO) {
3200                 hotkey_exit();
3201                 return res;
3202         }
3203
3204         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3205                         "legacy ibm/hotkey event reporting over procfs %s\n",
3206                         (hotkey_report_mode < 2) ?
3207                                 "enabled" : "disabled");
3208
3209         tpacpi_inputdev->open = &hotkey_inputdev_open;
3210         tpacpi_inputdev->close = &hotkey_inputdev_close;
3211
3212         hotkey_poll_setup_safe(true);
3213         tpacpi_send_radiosw_update();
3214         tpacpi_input_send_tabletsw();
3215
3216         return 0;
3217
3218 err_exit:
3219         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3220         hotkey_dev_attributes = NULL;
3221
3222         return (res < 0)? res : 1;
3223 }
3224
3225 static bool hotkey_notify_hotkey(const u32 hkey,
3226                                  bool *send_acpi_ev,
3227                                  bool *ignore_acpi_ev)
3228 {
3229         /* 0x1000-0x1FFF: key presses */
3230         unsigned int scancode = hkey & 0xfff;
3231         *send_acpi_ev = true;
3232         *ignore_acpi_ev = false;
3233
3234         if (scancode > 0 && scancode < 0x21) {
3235                 scancode--;
3236                 if (!(hotkey_source_mask & (1 << scancode))) {
3237                         tpacpi_input_send_key(scancode);
3238                         *send_acpi_ev = false;
3239                 } else {
3240                         *ignore_acpi_ev = true;
3241                 }
3242                 return true;
3243         }
3244         return false;
3245 }
3246
3247 static bool hotkey_notify_wakeup(const u32 hkey,
3248                                  bool *send_acpi_ev,
3249                                  bool *ignore_acpi_ev)
3250 {
3251         /* 0x2000-0x2FFF: Wakeup reason */
3252         *send_acpi_ev = true;
3253         *ignore_acpi_ev = false;
3254
3255         switch (hkey) {
3256         case 0x2304: /* suspend, undock */
3257         case 0x2404: /* hibernation, undock */
3258                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3259                 *ignore_acpi_ev = true;
3260                 break;
3261
3262         case 0x2305: /* suspend, bay eject */
3263         case 0x2405: /* hibernation, bay eject */
3264                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3265                 *ignore_acpi_ev = true;
3266                 break;
3267
3268         case 0x2313: /* Battery on critical low level (S3) */
3269         case 0x2413: /* Battery on critical low level (S4) */
3270                 printk(TPACPI_ALERT
3271                         "EMERGENCY WAKEUP: battery almost empty\n");
3272                 /* how to auto-heal: */
3273                 /* 2313: woke up from S3, go to S4/S5 */
3274                 /* 2413: woke up from S4, go to S5 */
3275                 break;
3276
3277         default:
3278                 return false;
3279         }
3280
3281         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3282                 printk(TPACPI_INFO
3283                        "woke up due to a hot-unplug "
3284                        "request...\n");
3285                 hotkey_wakeup_reason_notify_change();
3286         }
3287         return true;
3288 }
3289
3290 static bool hotkey_notify_usrevent(const u32 hkey,
3291                                  bool *send_acpi_ev,
3292                                  bool *ignore_acpi_ev)
3293 {
3294         /* 0x5000-0x5FFF: human interface helpers */
3295         *send_acpi_ev = true;
3296         *ignore_acpi_ev = false;
3297
3298         switch (hkey) {
3299         case 0x5010: /* Lenovo new BIOS: brightness changed */
3300         case 0x500b: /* X61t: tablet pen inserted into bay */
3301         case 0x500c: /* X61t: tablet pen removed from bay */
3302                 return true;
3303
3304         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3305         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3306                 tpacpi_input_send_tabletsw();
3307                 hotkey_tablet_mode_notify_change();
3308                 *send_acpi_ev = false;
3309                 return true;
3310
3311         case 0x5001:
3312         case 0x5002:
3313                 /* LID switch events.  Do not propagate */
3314                 *ignore_acpi_ev = true;
3315                 return true;
3316
3317         default:
3318                 return false;
3319         }
3320 }
3321
3322 static bool hotkey_notify_thermal(const u32 hkey,
3323                                  bool *send_acpi_ev,
3324                                  bool *ignore_acpi_ev)
3325 {
3326         /* 0x6000-0x6FFF: thermal alarms */
3327         *send_acpi_ev = true;
3328         *ignore_acpi_ev = false;
3329
3330         switch (hkey) {
3331         case 0x6011:
3332                 printk(TPACPI_CRIT
3333                         "THERMAL ALARM: battery is too hot!\n");
3334                 /* recommended action: warn user through gui */
3335                 return true;
3336         case 0x6012:
3337                 printk(TPACPI_ALERT
3338                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3339                 /* recommended action: immediate sleep/hibernate */
3340                 return true;
3341         case 0x6021:
3342                 printk(TPACPI_CRIT
3343                         "THERMAL ALARM: "
3344                         "a sensor reports something is too hot!\n");
3345                 /* recommended action: warn user through gui, that */
3346                 /* some internal component is too hot */
3347                 return true;
3348         case 0x6022:
3349                 printk(TPACPI_ALERT
3350                         "THERMAL EMERGENCY: "
3351                         "a sensor reports something is extremely hot!\n");
3352                 /* recommended action: immediate sleep/hibernate */
3353                 return true;
3354         case 0x6030:
3355                 printk(TPACPI_INFO
3356                         "EC reports that Thermal Table has changed\n");
3357                 /* recommended action: do nothing, we don't have
3358                  * Lenovo ATM information */
3359                 return true;
3360         default:
3361                 printk(TPACPI_ALERT
3362                          "THERMAL ALERT: unknown thermal alarm received\n");
3363                 return false;
3364         }
3365 }
3366
3367 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3368 {
3369         u32 hkey;
3370         bool send_acpi_ev;
3371         bool ignore_acpi_ev;
3372         bool known_ev;
3373
3374         if (event != 0x80) {
3375                 printk(TPACPI_ERR
3376                        "unknown HKEY notification event %d\n", event);
3377                 /* forward it to userspace, maybe it knows how to handle it */
3378                 acpi_bus_generate_netlink_event(
3379                                         ibm->acpi->device->pnp.device_class,
3380                                         dev_name(&ibm->acpi->device->dev),
3381                                         event, 0);
3382                 return;
3383         }
3384
3385         while (1) {
3386                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3387                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3388                         return;
3389                 }
3390
3391                 if (hkey == 0) {
3392                         /* queue empty */
3393                         return;
3394                 }
3395
3396                 send_acpi_ev = true;
3397                 ignore_acpi_ev = false;
3398
3399                 switch (hkey >> 12) {
3400                 case 1:
3401                         /* 0x1000-0x1FFF: key presses */
3402                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3403                                                  &ignore_acpi_ev);
3404                         break;
3405                 case 2:
3406                         /* 0x2000-0x2FFF: Wakeup reason */
3407                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3408                                                  &ignore_acpi_ev);
3409                         break;
3410                 case 3:
3411                         /* 0x3000-0x3FFF: bay-related wakeups */
3412                         if (hkey == 0x3003) {
3413                                 hotkey_autosleep_ack = 1;
3414                                 printk(TPACPI_INFO
3415                                        "bay ejected\n");
3416                                 hotkey_wakeup_hotunplug_complete_notify_change();
3417                                 known_ev = true;
3418                         } else {
3419                                 known_ev = false;
3420                         }
3421                         break;
3422                 case 4:
3423                         /* 0x4000-0x4FFF: dock-related wakeups */
3424                         if (hkey == 0x4003) {
3425                                 hotkey_autosleep_ack = 1;
3426                                 printk(TPACPI_INFO
3427                                        "undocked\n");
3428                                 hotkey_wakeup_hotunplug_complete_notify_change();
3429                                 known_ev = true;
3430                         } else {
3431                                 known_ev = false;
3432                         }
3433                         break;
3434                 case 5:
3435                         /* 0x5000-0x5FFF: human interface helpers */
3436                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3437                                                  &ignore_acpi_ev);
3438                         break;
3439                 case 6:
3440                         /* 0x6000-0x6FFF: thermal alarms */
3441                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3442                                                  &ignore_acpi_ev);
3443                         break;
3444                 case 7:
3445                         /* 0x7000-0x7FFF: misc */
3446                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3447                                 tpacpi_send_radiosw_update();
3448                                 send_acpi_ev = 0;
3449                                 known_ev = true;
3450                                 break;
3451                         }
3452                         /* fallthrough to default */
3453                 default:
3454                         known_ev = false;
3455                 }
3456                 if (!known_ev) {
3457                         printk(TPACPI_NOTICE
3458                                "unhandled HKEY event 0x%04x\n", hkey);
3459                         printk(TPACPI_NOTICE
3460                                "please report the conditions when this "
3461                                "event happened to %s\n", TPACPI_MAIL);
3462                 }
3463
3464                 /* Legacy events */
3465                 if (!ignore_acpi_ev &&
3466                     (send_acpi_ev || hotkey_report_mode < 2)) {
3467                         acpi_bus_generate_proc_event(ibm->acpi->device,
3468                                                      event, hkey);
3469                 }
3470
3471                 /* netlink events */
3472                 if (!ignore_acpi_ev && send_acpi_ev) {
3473                         acpi_bus_generate_netlink_event(
3474                                         ibm->acpi->device->pnp.device_class,
3475                                         dev_name(&ibm->acpi->device->dev),
3476                                         event, hkey);
3477                 }
3478         }
3479 }
3480
3481 static void hotkey_suspend(pm_message_t state)
3482 {
3483         /* Do these on suspend, we get the events on early resume! */
3484         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3485         hotkey_autosleep_ack = 0;
3486 }
3487
3488 static void hotkey_resume(void)
3489 {
3490         tpacpi_disable_brightness_delay();
3491
3492         if (hotkey_mask_get())
3493                 printk(TPACPI_ERR
3494                        "error while trying to read hot key mask "
3495                        "from firmware\n");
3496         tpacpi_send_radiosw_update();
3497         hotkey_tablet_mode_notify_change();
3498         hotkey_wakeup_reason_notify_change();
3499         hotkey_wakeup_hotunplug_complete_notify_change();
3500         hotkey_poll_setup_safe(false);
3501 }
3502
3503 /* procfs -------------------------------------------------------------- */
3504 static int hotkey_read(char *p)
3505 {
3506         int res, status;
3507         int len = 0;
3508
3509         if (!tp_features.hotkey) {
3510                 len += sprintf(p + len, "status:\t\tnot supported\n");
3511                 return len;
3512         }
3513
3514         if (mutex_lock_killable(&hotkey_mutex))
3515                 return -ERESTARTSYS;
3516         res = hotkey_status_get(&status);
3517         if (!res)
3518                 res = hotkey_mask_get();
3519         mutex_unlock(&hotkey_mutex);
3520         if (res)
3521                 return res;
3522
3523         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3524         if (tp_features.hotkey_mask) {
3525                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3526                 len += sprintf(p + len,
3527                                "commands:\tenable, disable, reset, <mask>\n");
3528         } else {
3529                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3530                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3531         }
3532
3533         return len;
3534 }
3535
3536 static void hotkey_enabledisable_warn(bool enable)
3537 {
3538         tpacpi_log_usertask("procfs hotkey enable/disable");
3539         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3540                         TPACPI_WARN
3541                         "hotkey enable/disable functionality has been "
3542                         "removed from the driver.  Hotkeys are always "
3543                         "enabled\n"))
3544                 printk(TPACPI_ERR
3545                         "Please remove the hotkey=enable module "
3546                         "parameter, it is deprecated.  Hotkeys are always "
3547                         "enabled\n");
3548 }
3549
3550 static int hotkey_write(char *buf)
3551 {
3552         int res;
3553         u32 mask;
3554         char *cmd;
3555
3556         if (!tp_features.hotkey)
3557                 return -ENODEV;
3558
3559         if (mutex_lock_killable(&hotkey_mutex))
3560                 return -ERESTARTSYS;
3561
3562         mask = hotkey_mask;
3563
3564         res = 0;
3565         while ((cmd = next_cmd(&buf))) {
3566                 if (strlencmp(cmd, "enable") == 0) {
3567                         hotkey_enabledisable_warn(1);
3568                 } else if (strlencmp(cmd, "disable") == 0) {
3569                         hotkey_enabledisable_warn(0);
3570                         res = -EPERM;
3571                 } else if (strlencmp(cmd, "reset") == 0) {
3572                         mask = hotkey_orig_mask;
3573                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3574                         /* mask set */
3575                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3576                         /* mask set */
3577                 } else {
3578                         res = -EINVAL;
3579                         goto errexit;
3580                 }
3581         }
3582
3583         if (!res)
3584                 tpacpi_disclose_usertask("procfs hotkey",
3585                         "set mask to 0x%08x\n", mask);
3586
3587         if (!res && mask != hotkey_mask)
3588                 res = hotkey_mask_set(mask);
3589
3590 errexit:
3591         mutex_unlock(&hotkey_mutex);
3592         return res;
3593 }
3594
3595 static const struct acpi_device_id ibm_htk_device_ids[] = {
3596         {TPACPI_ACPI_HKEY_HID, 0},
3597         {"", 0},
3598 };
3599
3600 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3601         .hid = ibm_htk_device_ids,
3602         .notify = hotkey_notify,
3603         .handle = &hkey_handle,
3604         .type = ACPI_DEVICE_NOTIFY,
3605 };
3606
3607 static struct ibm_struct hotkey_driver_data = {
3608         .name = "hotkey",
3609         .read = hotkey_read,
3610         .write = hotkey_write,
3611         .exit = hotkey_exit,
3612         .resume = hotkey_resume,
3613         .suspend = hotkey_suspend,
3614         .acpi = &ibm_hotkey_acpidriver,
3615 };
3616
3617 /*************************************************************************
3618  * Bluetooth subdriver
3619  */
3620
3621 enum {
3622         /* ACPI GBDC/SBDC bits */
3623         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3624         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3625         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3626                                                    off / last state */
3627 };
3628
3629 enum {
3630         /* ACPI \BLTH commands */
3631         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3632         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3633         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3634         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3635         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3636 };
3637
3638 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3639
3640 static void bluetooth_suspend(pm_message_t state)
3641 {
3642         /* Try to make sure radio will resume powered off */
3643         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3644                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3645                 vdbg_printk(TPACPI_DBG_RFKILL,
3646                         "bluetooth power down on resume request failed\n");
3647 }
3648
3649 static int bluetooth_get_status(void)
3650 {
3651         int status;
3652
3653 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3654         if (dbg_bluetoothemul)
3655                 return (tpacpi_bluetooth_emulstate) ?
3656                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3657 #endif
3658
3659         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3660                 return -EIO;
3661
3662         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3663                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3664 }
3665
3666 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3667 {
3668         int status;
3669
3670         vdbg_printk(TPACPI_DBG_RFKILL,
3671                 "will attempt to %s bluetooth\n",
3672                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3673
3674 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3675         if (dbg_bluetoothemul) {
3676                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3677                 return 0;
3678         }
3679 #endif
3680
3681         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3682         if (state == TPACPI_RFK_RADIO_ON)
3683                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3684         else
3685                 status = 0;
3686
3687         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3688                 return -EIO;
3689
3690         return 0;
3691 }
3692
3693 /* sysfs bluetooth enable ---------------------------------------------- */
3694 static ssize_t bluetooth_enable_show(struct device *dev,
3695                            struct device_attribute *attr,
3696                            char *buf)
3697 {
3698         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3699                         attr, buf);
3700 }
3701
3702 static ssize_t bluetooth_enable_store(struct device *dev,
3703                             struct device_attribute *attr,
3704                             const char *buf, size_t count)
3705 {
3706         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3707                                 attr, buf, count);
3708 }
3709
3710 static struct device_attribute dev_attr_bluetooth_enable =
3711         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3712                 bluetooth_enable_show, bluetooth_enable_store);
3713
3714 /* --------------------------------------------------------------------- */
3715
3716 static struct attribute *bluetooth_attributes[] = {
3717         &dev_attr_bluetooth_enable.attr,
3718         NULL
3719 };
3720
3721 static const struct attribute_group bluetooth_attr_group = {
3722         .attrs = bluetooth_attributes,
3723 };
3724
3725 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3726         .get_status = bluetooth_get_status,
3727         .set_status = bluetooth_set_status,
3728 };
3729
3730 static void bluetooth_shutdown(void)
3731 {
3732         /* Order firmware to save current state to NVRAM */
3733         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3734                         TP_ACPI_BLTH_SAVE_STATE))
3735                 printk(TPACPI_NOTICE
3736                         "failed to save bluetooth state to NVRAM\n");
3737         else
3738                 vdbg_printk(TPACPI_DBG_RFKILL,
3739                         "bluestooth state saved to NVRAM\n");
3740 }
3741
3742 static void bluetooth_exit(void)
3743 {
3744         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3745                         &bluetooth_attr_group);
3746
3747         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3748
3749         bluetooth_shutdown();
3750 }
3751
3752 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3753 {
3754         int res;
3755         int status = 0;
3756
3757         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3758                         "initializing bluetooth subdriver\n");
3759
3760         TPACPI_ACPIHANDLE_INIT(hkey);
3761
3762         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3763            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3764         tp_features.bluetooth = hkey_handle &&
3765             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3766
3767         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3768                 "bluetooth is %s, status 0x%02x\n",
3769                 str_supported(tp_features.bluetooth),
3770                 status);
3771
3772 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3773         if (dbg_bluetoothemul) {
3774                 tp_features.bluetooth = 1;
3775                 printk(TPACPI_INFO
3776                         "bluetooth switch emulation enabled\n");
3777         } else
3778 #endif
3779         if (tp_features.bluetooth &&
3780             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3781                 /* no bluetooth hardware present in system */
3782                 tp_features.bluetooth = 0;
3783                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3784                            "bluetooth hardware not installed\n");
3785         }
3786
3787         if (!tp_features.bluetooth)
3788                 return 1;
3789
3790         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3791                                 &bluetooth_tprfk_ops,
3792                                 RFKILL_TYPE_BLUETOOTH,
3793                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3794                                 true);
3795         if (res)
3796                 return res;
3797
3798         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3799                                 &bluetooth_attr_group);
3800         if (res) {
3801                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3802                 return res;
3803         }
3804
3805         return 0;
3806 }
3807
3808 /* procfs -------------------------------------------------------------- */
3809 static int bluetooth_read(char *p)
3810 {
3811         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3812 }
3813
3814 static int bluetooth_write(char *buf)
3815 {
3816         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3817 }
3818
3819 static struct ibm_struct bluetooth_driver_data = {
3820         .name = "bluetooth",
3821         .read = bluetooth_read,
3822         .write = bluetooth_write,
3823         .exit = bluetooth_exit,
3824         .suspend = bluetooth_suspend,
3825         .shutdown = bluetooth_shutdown,
3826 };
3827
3828 /*************************************************************************
3829  * Wan subdriver
3830  */
3831
3832 enum {
3833         /* ACPI GWAN/SWAN bits */
3834         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3835         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3836         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3837                                                    off / last state */
3838 };
3839
3840 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3841
3842 static void wan_suspend(pm_message_t state)
3843 {
3844         /* Try to make sure radio will resume powered off */
3845         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3846                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3847                 vdbg_printk(TPACPI_DBG_RFKILL,
3848                         "WWAN power down on resume request failed\n");
3849 }
3850
3851 static int wan_get_status(void)
3852 {
3853         int status;
3854
3855 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3856         if (dbg_wwanemul)
3857                 return (tpacpi_wwan_emulstate) ?
3858                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3859 #endif
3860
3861         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3862                 return -EIO;
3863
3864         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3865                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3866 }
3867
3868 static int wan_set_status(enum tpacpi_rfkill_state state)
3869 {
3870         int status;
3871
3872         vdbg_printk(TPACPI_DBG_RFKILL,
3873                 "will attempt to %s wwan\n",
3874                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3875
3876 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3877         if (dbg_wwanemul) {
3878                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3879                 return 0;
3880         }
3881 #endif
3882
3883         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3884         if (state == TPACPI_RFK_RADIO_ON)
3885                 status = TP_ACPI_WANCARD_RADIOSSW;
3886         else
3887                 status = 0;
3888
3889         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3890                 return -EIO;
3891
3892         return 0;
3893 }
3894
3895 /* sysfs wan enable ---------------------------------------------------- */
3896 static ssize_t wan_enable_show(struct device *dev,
3897                            struct device_attribute *attr,
3898                            char *buf)
3899 {
3900         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3901                         attr, buf);
3902 }
3903
3904 static ssize_t wan_enable_store(struct device *dev,
3905                             struct device_attribute *attr,
3906                             const char *buf, size_t count)
3907 {
3908         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3909                         attr, buf, count);
3910 }
3911
3912 static struct device_attribute dev_attr_wan_enable =
3913         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3914                 wan_enable_show, wan_enable_store);
3915
3916 /* --------------------------------------------------------------------- */
3917
3918 static struct attribute *wan_attributes[] = {
3919         &dev_attr_wan_enable.attr,
3920         NULL
3921 };
3922
3923 static const struct attribute_group wan_attr_group = {
3924         .attrs = wan_attributes,
3925 };
3926
3927 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3928         .get_status = wan_get_status,
3929         .set_status = wan_set_status,
3930 };
3931
3932 static void wan_shutdown(void)
3933 {
3934         /* Order firmware to save current state to NVRAM */
3935         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3936                         TP_ACPI_WGSV_SAVE_STATE))
3937                 printk(TPACPI_NOTICE
3938                         "failed to save WWAN state to NVRAM\n");
3939         else
3940                 vdbg_printk(TPACPI_DBG_RFKILL,
3941                         "WWAN state saved to NVRAM\n");
3942 }
3943
3944 static void wan_exit(void)
3945 {
3946         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3947                 &wan_attr_group);
3948
3949         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3950
3951         wan_shutdown();
3952 }
3953
3954 static int __init wan_init(struct ibm_init_struct *iibm)
3955 {
3956         int res;
3957         int status = 0;
3958
3959         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3960                         "initializing wan subdriver\n");
3961
3962         TPACPI_ACPIHANDLE_INIT(hkey);
3963
3964         tp_features.wan = hkey_handle &&
3965             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3966
3967         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3968                 "wan is %s, status 0x%02x\n",
3969                 str_supported(tp_features.wan),
3970                 status);
3971
3972 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3973         if (dbg_wwanemul) {
3974                 tp_features.wan = 1;
3975                 printk(TPACPI_INFO
3976                         "wwan switch emulation enabled\n");
3977         } else
3978 #endif
3979         if (tp_features.wan &&
3980             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3981                 /* no wan hardware present in system */
3982                 tp_features.wan = 0;
3983                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3984                            "wan hardware not installed\n");
3985         }
3986
3987         if (!tp_features.wan)
3988                 return 1;
3989
3990         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3991                                 &wan_tprfk_ops,
3992                                 RFKILL_TYPE_WWAN,
3993                                 TPACPI_RFK_WWAN_SW_NAME,
3994                                 true);
3995         if (res)
3996                 return res;
3997
3998         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3999                                 &wan_attr_group);
4000
4001         if (res) {
4002                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4003                 return res;
4004         }
4005
4006         return 0;
4007 }
4008
4009 /* procfs -------------------------------------------------------------- */
4010 static int wan_read(char *p)
4011 {
4012         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
4013 }
4014
4015 static int wan_write(char *buf)
4016 {
4017         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4018 }
4019
4020 static struct ibm_struct wan_driver_data = {
4021         .name = "wan",
4022         .read = wan_read,
4023         .write = wan_write,
4024         .exit = wan_exit,
4025         .suspend = wan_suspend,
4026         .shutdown = wan_shutdown,
4027 };
4028
4029 /*************************************************************************
4030  * UWB subdriver
4031  */
4032
4033 enum {
4034         /* ACPI GUWB/SUWB bits */
4035         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
4036         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
4037 };
4038
4039 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4040
4041 static int uwb_get_status(void)
4042 {
4043         int status;
4044
4045 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4046         if (dbg_uwbemul)
4047                 return (tpacpi_uwb_emulstate) ?
4048                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4049 #endif
4050
4051         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4052                 return -EIO;
4053
4054         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4055                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4056 }
4057
4058 static int uwb_set_status(enum tpacpi_rfkill_state state)
4059 {
4060         int status;
4061
4062         vdbg_printk(TPACPI_DBG_RFKILL,
4063                 "will attempt to %s UWB\n",
4064                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4065
4066 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4067         if (dbg_uwbemul) {
4068                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4069                 return 0;
4070         }
4071 #endif
4072
4073         if (state == TPACPI_RFK_RADIO_ON)
4074                 status = TP_ACPI_UWB_RADIOSSW;
4075         else
4076                 status = 0;
4077
4078         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4079                 return -EIO;
4080
4081         return 0;
4082 }
4083
4084 /* --------------------------------------------------------------------- */
4085
4086 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4087         .get_status = uwb_get_status,
4088         .set_status = uwb_set_status,
4089 };
4090
4091 static void uwb_exit(void)
4092 {
4093         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4094 }
4095
4096 static int __init uwb_init(struct ibm_init_struct *iibm)
4097 {
4098         int res;
4099         int status = 0;
4100
4101         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4102                         "initializing uwb subdriver\n");
4103
4104         TPACPI_ACPIHANDLE_INIT(hkey);
4105
4106         tp_features.uwb = hkey_handle &&
4107             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4108
4109         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4110                 "uwb is %s, status 0x%02x\n",
4111                 str_supported(tp_features.uwb),
4112                 status);
4113
4114 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4115         if (dbg_uwbemul) {
4116                 tp_features.uwb = 1;
4117                 printk(TPACPI_INFO
4118                         "uwb switch emulation enabled\n");
4119         } else
4120 #endif
4121         if (tp_features.uwb &&
4122             !(status & TP_ACPI_UWB_HWPRESENT)) {
4123                 /* no uwb hardware present in system */
4124                 tp_features.uwb = 0;
4125                 dbg_printk(TPACPI_DBG_INIT,
4126                            "uwb hardware not installed\n");
4127         }
4128
4129         if (!tp_features.uwb)
4130                 return 1;
4131
4132         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4133                                 &uwb_tprfk_ops,
4134                                 RFKILL_TYPE_UWB,
4135                                 TPACPI_RFK_UWB_SW_NAME,
4136                                 false);
4137         return res;
4138 }
4139
4140 static struct ibm_struct uwb_driver_data = {
4141         .name = "uwb",
4142         .exit = uwb_exit,
4143         .flags.experimental = 1,
4144 };
4145
4146 /*************************************************************************
4147  * Video subdriver
4148  */
4149
4150 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4151
4152 enum video_access_mode {
4153         TPACPI_VIDEO_NONE = 0,
4154         TPACPI_VIDEO_570,       /* 570 */
4155         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4156         TPACPI_VIDEO_NEW,       /* all others */
4157 };
4158
4159 enum {  /* video status flags, based on VIDEO_570 */
4160         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4161         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4162         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4163 };
4164
4165 enum {  /* TPACPI_VIDEO_570 constants */
4166         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4167         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4168                                                  * video_status_flags */
4169         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4170         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4171 };
4172
4173 static enum video_access_mode video_supported;
4174 static int video_orig_autosw;
4175
4176 static int video_autosw_get(void);
4177 static int video_autosw_set(int enable);
4178
4179 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4180
4181 static int __init video_init(struct ibm_init_struct *iibm)
4182 {
4183         int ivga;
4184
4185         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4186
4187         TPACPI_ACPIHANDLE_INIT(vid);
4188         TPACPI_ACPIHANDLE_INIT(vid2);
4189
4190         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4191                 /* G41, assume IVGA doesn't change */
4192                 vid_handle = vid2_handle;
4193
4194         if (!vid_handle)
4195                 /* video switching not supported on R30, R31 */
4196                 video_supported = TPACPI_VIDEO_NONE;
4197         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4198                 /* 570 */
4199                 video_supported = TPACPI_VIDEO_570;
4200         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4201                 /* 600e/x, 770e, 770x */
4202                 video_supported = TPACPI_VIDEO_770;
4203         else
4204                 /* all others */
4205                 video_supported = TPACPI_VIDEO_NEW;
4206
4207         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4208                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4209                 video_supported);
4210
4211         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4212 }
4213
4214 static void video_exit(void)
4215 {
4216         dbg_printk(TPACPI_DBG_EXIT,
4217                    "restoring original video autoswitch mode\n");
4218         if (video_autosw_set(video_orig_autosw))
4219                 printk(TPACPI_ERR "error while trying to restore original "
4220                         "video autoswitch mode\n");
4221 }
4222
4223 static int video_outputsw_get(void)
4224 {
4225         int status = 0;
4226         int i;
4227
4228         switch (video_supported) {
4229         case TPACPI_VIDEO_570:
4230                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4231                                  TP_ACPI_VIDEO_570_PHSCMD))
4232                         return -EIO;
4233                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4234                 break;
4235         case TPACPI_VIDEO_770:
4236                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4237                         return -EIO;
4238                 if (i)
4239                         status |= TP_ACPI_VIDEO_S_LCD;
4240                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4241                         return -EIO;
4242                 if (i)
4243                         status |= TP_ACPI_VIDEO_S_CRT;
4244                 break;
4245         case TPACPI_VIDEO_NEW:
4246                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4247                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4248                         return -EIO;
4249                 if (i)
4250                         status |= TP_ACPI_VIDEO_S_CRT;
4251
4252                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4253                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4254                         return -EIO;
4255                 if (i)
4256                         status |= TP_ACPI_VIDEO_S_LCD;
4257                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4258                         return -EIO;
4259                 if (i)
4260                         status |= TP_ACPI_VIDEO_S_DVI;
4261                 break;
4262         default:
4263                 return -ENOSYS;
4264         }
4265
4266         return status;
4267 }
4268
4269 static int video_outputsw_set(int status)
4270 {
4271         int autosw;
4272         int res = 0;
4273
4274         switch (video_supported) {
4275         case TPACPI_VIDEO_570:
4276                 res = acpi_evalf(NULL, NULL,
4277                                  "\\_SB.PHS2", "vdd",
4278                                  TP_ACPI_VIDEO_570_PHS2CMD,
4279                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4280                 break;
4281         case TPACPI_VIDEO_770:
4282                 autosw = video_autosw_get();
4283                 if (autosw < 0)
4284                         return autosw;
4285
4286                 res = video_autosw_set(1);
4287                 if (res)
4288                         return res;
4289                 res = acpi_evalf(vid_handle, NULL,
4290                                  "ASWT", "vdd", status * 0x100, 0);
4291                 if (!autosw && video_autosw_set(autosw)) {
4292                         printk(TPACPI_ERR
4293                                "video auto-switch left enabled due to error\n");
4294                         return -EIO;
4295                 }
4296                 break;
4297         case TPACPI_VIDEO_NEW:
4298                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4299                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4300                 break;
4301         default:
4302                 return -ENOSYS;
4303         }
4304
4305         return (res)? 0 : -EIO;
4306 }
4307
4308 static int video_autosw_get(void)
4309 {
4310         int autosw = 0;
4311
4312         switch (video_supported) {
4313         case TPACPI_VIDEO_570:
4314                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4315                         return -EIO;
4316                 break;
4317         case TPACPI_VIDEO_770:
4318         case TPACPI_VIDEO_NEW:
4319                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4320                         return -EIO;
4321                 break;
4322         default:
4323                 return -ENOSYS;
4324         }
4325
4326         return autosw & 1;
4327 }
4328
4329 static int video_autosw_set(int enable)
4330 {
4331         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4332                 return -EIO;
4333         return 0;
4334 }
4335
4336 static int video_outputsw_cycle(void)
4337 {
4338         int autosw = video_autosw_get();
4339         int res;
4340
4341         if (autosw < 0)
4342                 return autosw;
4343
4344         switch (video_supported) {
4345         case TPACPI_VIDEO_570:
4346                 res = video_autosw_set(1);
4347                 if (res)
4348                         return res;
4349                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4350                 break;
4351         case TPACPI_VIDEO_770:
4352         case TPACPI_VIDEO_NEW:
4353                 res = video_autosw_set(1);
4354                 if (res)
4355                         return res;
4356                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4357                 break;
4358         default:
4359                 return -ENOSYS;
4360         }
4361         if (!autosw && video_autosw_set(autosw)) {
4362                 printk(TPACPI_ERR
4363                        "video auto-switch left enabled due to error\n");
4364                 return -EIO;
4365         }
4366
4367         return (res)? 0 : -EIO;
4368 }
4369
4370 static int video_expand_toggle(void)
4371 {
4372         switch (video_supported) {
4373         case TPACPI_VIDEO_570:
4374                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4375                         0 : -EIO;
4376         case TPACPI_VIDEO_770:
4377                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4378                         0 : -EIO;
4379         case TPACPI_VIDEO_NEW:
4380                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4381                         0 : -EIO;
4382         default:
4383                 return -ENOSYS;
4384         }
4385         /* not reached */
4386 }
4387
4388 static int video_read(char *p)
4389 {
4390         int status, autosw;
4391         int len = 0;
4392
4393         if (video_supported == TPACPI_VIDEO_NONE) {
4394                 len += sprintf(p + len, "status:\t\tnot supported\n");
4395                 return len;
4396         }
4397
4398         status = video_outputsw_get();
4399         if (status < 0)
4400                 return status;
4401
4402         autosw = video_autosw_get();
4403         if (autosw < 0)
4404                 return autosw;
4405
4406         len += sprintf(p + len, "status:\t\tsupported\n");
4407         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4408         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4409         if (video_supported == TPACPI_VIDEO_NEW)
4410                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4411         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4412         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4413         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4414         if (video_supported == TPACPI_VIDEO_NEW)
4415                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4416         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4417         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4418
4419         return len;
4420 }
4421
4422 static int video_write(char *buf)
4423 {
4424         char *cmd;
4425         int enable, disable, status;
4426         int res;
4427
4428         if (video_supported == TPACPI_VIDEO_NONE)
4429                 return -ENODEV;
4430
4431         enable = 0;
4432         disable = 0;
4433
4434         while ((cmd = next_cmd(&buf))) {
4435                 if (strlencmp(cmd, "lcd_enable") == 0) {
4436                         enable |= TP_ACPI_VIDEO_S_LCD;
4437                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4438                         disable |= TP_ACPI_VIDEO_S_LCD;
4439                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4440                         enable |= TP_ACPI_VIDEO_S_CRT;
4441                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4442                         disable |= TP_ACPI_VIDEO_S_CRT;
4443                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4444                            strlencmp(cmd, "dvi_enable") == 0) {
4445                         enable |= TP_ACPI_VIDEO_S_DVI;
4446                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4447                            strlencmp(cmd, "dvi_disable") == 0) {
4448                         disable |= TP_ACPI_VIDEO_S_DVI;
4449                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4450                         res = video_autosw_set(1);
4451                         if (res)
4452                                 return res;
4453                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4454                         res = video_autosw_set(0);
4455                         if (res)
4456                                 return res;
4457                 } else if (strlencmp(cmd, "video_switch") == 0) {
4458                         res = video_outputsw_cycle();
4459                         if (res)
4460                                 return res;
4461                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4462                         res = video_expand_toggle();
4463                         if (res)
4464                                 return res;
4465                 } else
4466                         return -EINVAL;
4467         }
4468
4469         if (enable || disable) {
4470                 status = video_outputsw_get();
4471                 if (status < 0)
4472                         return status;
4473                 res = video_outputsw_set((status & ~disable) | enable);
4474                 if (res)
4475                         return res;
4476         }
4477
4478         return 0;
4479 }
4480
4481 static struct ibm_struct video_driver_data = {
4482         .name = "video",
4483         .read = video_read,
4484         .write = video_write,
4485         .exit = video_exit,
4486 };
4487
4488 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4489
4490 /*************************************************************************
4491  * Light (thinklight) subdriver
4492  */
4493
4494 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4495 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4496
4497 static int light_get_status(void)
4498 {
4499         int status = 0;
4500
4501         if (tp_features.light_status) {
4502                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4503                         return -EIO;
4504                 return (!!status);
4505         }
4506
4507         return -ENXIO;
4508 }
4509
4510 static int light_set_status(int status)
4511 {
4512         int rc;
4513
4514         if (tp_features.light) {
4515                 if (cmos_handle) {
4516                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4517                                         (status)?
4518                                                 TP_CMOS_THINKLIGHT_ON :
4519                                                 TP_CMOS_THINKLIGHT_OFF);
4520                 } else {
4521                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4522                                         (status)? 1 : 0);
4523                 }
4524                 return (rc)? 0 : -EIO;
4525         }
4526
4527         return -ENXIO;
4528 }
4529
4530 static void light_set_status_worker(struct work_struct *work)
4531 {
4532         struct tpacpi_led_classdev *data =
4533                         container_of(work, struct tpacpi_led_classdev, work);
4534
4535         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4536                 light_set_status((data->new_state != TPACPI_LED_OFF));
4537 }
4538
4539 static void light_sysfs_set(struct led_classdev *led_cdev,
4540                         enum led_brightness brightness)
4541 {
4542         struct tpacpi_led_classdev *data =
4543                 container_of(led_cdev,
4544                              struct tpacpi_led_classdev,
4545                              led_classdev);
4546         data->new_state = (brightness != LED_OFF) ?
4547                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4548         queue_work(tpacpi_wq, &data->work);
4549 }
4550
4551 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4552 {
4553         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4554 }
4555
4556 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4557         .led_classdev = {
4558                 .name           = "tpacpi::thinklight",
4559                 .brightness_set = &light_sysfs_set,
4560                 .brightness_get = &light_sysfs_get,
4561         }
4562 };
4563
4564 static int __init light_init(struct ibm_init_struct *iibm)
4565 {
4566         int rc;
4567
4568         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4569
4570         TPACPI_ACPIHANDLE_INIT(ledb);
4571         TPACPI_ACPIHANDLE_INIT(lght);
4572         TPACPI_ACPIHANDLE_INIT(cmos);
4573         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4574
4575         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4576         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4577
4578         if (tp_features.light)
4579                 /* light status not supported on
4580                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4581                 tp_features.light_status =
4582                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4583
4584         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4585                 str_supported(tp_features.light),
4586                 str_supported(tp_features.light_status));
4587
4588         if (!tp_features.light)
4589                 return 1;
4590
4591         rc = led_classdev_register(&tpacpi_pdev->dev,
4592                                    &tpacpi_led_thinklight.led_classdev);
4593
4594         if (rc < 0) {
4595                 tp_features.light = 0;
4596                 tp_features.light_status = 0;
4597         } else  {
4598                 rc = 0;
4599         }
4600
4601         return rc;
4602 }
4603
4604 static void light_exit(void)
4605 {
4606         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4607         if (work_pending(&tpacpi_led_thinklight.work))
4608                 flush_workqueue(tpacpi_wq);
4609 }
4610
4611 static int light_read(char *p)
4612 {
4613         int len = 0;
4614         int status;
4615
4616         if (!tp_features.light) {
4617                 len += sprintf(p + len, "status:\t\tnot supported\n");
4618         } else if (!tp_features.light_status) {
4619                 len += sprintf(p + len, "status:\t\tunknown\n");
4620                 len += sprintf(p + len, "commands:\ton, off\n");
4621         } else {
4622                 status = light_get_status();
4623                 if (status < 0)
4624                         return status;
4625                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4626                 len += sprintf(p + len, "commands:\ton, off\n");
4627         }
4628
4629         return len;
4630 }
4631
4632 static int light_write(char *buf)
4633 {
4634         char *cmd;
4635         int newstatus = 0;
4636
4637         if (!tp_features.light)
4638                 return -ENODEV;
4639
4640         while ((cmd = next_cmd(&buf))) {
4641                 if (strlencmp(cmd, "on") == 0) {
4642                         newstatus = 1;
4643                 } else if (strlencmp(cmd, "off") == 0) {
4644                         newstatus = 0;
4645                 } else
4646                         return -EINVAL;
4647         }
4648
4649         return light_set_status(newstatus);
4650 }
4651
4652 static struct ibm_struct light_driver_data = {
4653         .name = "light",
4654         .read = light_read,
4655         .write = light_write,
4656         .exit = light_exit,
4657 };
4658
4659 /*************************************************************************
4660  * CMOS subdriver
4661  */
4662
4663 /* sysfs cmos_command -------------------------------------------------- */
4664 static ssize_t cmos_command_store(struct device *dev,
4665                             struct device_attribute *attr,
4666                             const char *buf, size_t count)
4667 {
4668         unsigned long cmos_cmd;
4669         int res;
4670
4671         if (parse_strtoul(buf, 21, &cmos_cmd))
4672                 return -EINVAL;
4673
4674         res = issue_thinkpad_cmos_command(cmos_cmd);
4675         return (res)? res : count;
4676 }
4677
4678 static struct device_attribute dev_attr_cmos_command =
4679         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4680
4681 /* --------------------------------------------------------------------- */
4682
4683 static int __init cmos_init(struct ibm_init_struct *iibm)
4684 {
4685         int res;
4686
4687         vdbg_printk(TPACPI_DBG_INIT,
4688                 "initializing cmos commands subdriver\n");
4689
4690         TPACPI_ACPIHANDLE_INIT(cmos);
4691
4692         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4693                 str_supported(cmos_handle != NULL));
4694
4695         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4696         if (res)
4697                 return res;
4698
4699         return (cmos_handle)? 0 : 1;
4700 }
4701
4702 static void cmos_exit(void)
4703 {
4704         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4705 }
4706
4707 static int cmos_read(char *p)
4708 {
4709         int len = 0;
4710
4711         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4712            R30, R31, T20-22, X20-21 */
4713         if (!cmos_handle)
4714                 len += sprintf(p + len, "status:\t\tnot supported\n");
4715         else {
4716                 len += sprintf(p + len, "status:\t\tsupported\n");
4717                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4718         }
4719
4720         return len;
4721 }
4722
4723 static int cmos_write(char *buf)
4724 {
4725         char *cmd;
4726         int cmos_cmd, res;
4727
4728         while ((cmd = next_cmd(&buf))) {
4729                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4730                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4731                         /* cmos_cmd set */
4732                 } else
4733                         return -EINVAL;
4734
4735                 res = issue_thinkpad_cmos_command(cmos_cmd);
4736                 if (res)
4737                         return res;
4738         }
4739
4740         return 0;
4741 }
4742
4743 static struct ibm_struct cmos_driver_data = {
4744         .name = "cmos",
4745         .read = cmos_read,
4746         .write = cmos_write,
4747         .exit = cmos_exit,
4748 };
4749
4750 /*************************************************************************
4751  * LED subdriver
4752  */
4753
4754 enum led_access_mode {
4755         TPACPI_LED_NONE = 0,
4756         TPACPI_LED_570, /* 570 */
4757         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4758         TPACPI_LED_NEW, /* all others */
4759 };
4760
4761 enum {  /* For TPACPI_LED_OLD */
4762         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4763         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4764         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4765 };
4766
4767 static enum led_access_mode led_supported;
4768
4769 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4770            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4771                                 /* T20-22, X20-21 */
4772            "LED",               /* all others */
4773            );                   /* R30, R31 */
4774
4775 #define TPACPI_LED_NUMLEDS 16
4776 static struct tpacpi_led_classdev *tpacpi_leds;
4777 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4778 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4779         /* there's a limit of 19 chars + NULL before 2.6.26 */
4780         "tpacpi::power",
4781         "tpacpi:orange:batt",
4782         "tpacpi:green:batt",
4783         "tpacpi::dock_active",
4784         "tpacpi::bay_active",
4785         "tpacpi::dock_batt",
4786         "tpacpi::unknown_led",
4787         "tpacpi::standby",
4788         "tpacpi::dock_status1",
4789         "tpacpi::dock_status2",
4790         "tpacpi::unknown_led2",
4791         "tpacpi::unknown_led3",
4792         "tpacpi::thinkvantage",
4793 };
4794 #define TPACPI_SAFE_LEDS        0x1081U
4795
4796 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4797 {
4798 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4799         return false;
4800 #else
4801         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4802 #endif
4803 }
4804
4805 static int led_get_status(const unsigned int led)
4806 {
4807         int status;
4808         enum led_status_t led_s;
4809
4810         switch (led_supported) {
4811         case TPACPI_LED_570:
4812                 if (!acpi_evalf(ec_handle,
4813                                 &status, "GLED", "dd", 1 << led))
4814                         return -EIO;
4815                 led_s = (status == 0)?
4816                                 TPACPI_LED_OFF :
4817                                 ((status == 1)?
4818                                         TPACPI_LED_ON :
4819                                         TPACPI_LED_BLINK);
4820                 tpacpi_led_state_cache[led] = led_s;
4821                 return led_s;
4822         default:
4823                 return -ENXIO;
4824         }
4825
4826         /* not reached */
4827 }
4828
4829 static int led_set_status(const unsigned int led,
4830                           const enum led_status_t ledstatus)
4831 {
4832         /* off, on, blink. Index is led_status_t */
4833         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4834         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4835
4836         int rc = 0;
4837
4838         switch (led_supported) {
4839         case TPACPI_LED_570:
4840                 /* 570 */
4841                 if (unlikely(led > 7))
4842                         return -EINVAL;
4843                 if (unlikely(tpacpi_is_led_restricted(led)))
4844                         return -EPERM;
4845                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4846                                 (1 << led), led_sled_arg1[ledstatus]))
4847                         rc = -EIO;
4848                 break;
4849         case TPACPI_LED_OLD:
4850                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4851                 if (unlikely(led > 7))
4852                         return -EINVAL;
4853                 if (unlikely(tpacpi_is_led_restricted(led)))
4854                         return -EPERM;
4855                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4856                 if (rc >= 0)
4857                         rc = ec_write(TPACPI_LED_EC_HLBL,
4858                                       (ledstatus == TPACPI_LED_BLINK) << led);
4859                 if (rc >= 0)
4860                         rc = ec_write(TPACPI_LED_EC_HLCL,
4861                                       (ledstatus != TPACPI_LED_OFF) << led);
4862                 break;
4863         case TPACPI_LED_NEW:
4864                 /* all others */
4865                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4866                         return -EINVAL;
4867                 if (unlikely(tpacpi_is_led_restricted(led)))
4868                         return -EPERM;
4869                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4870                                 led, led_led_arg1[ledstatus]))
4871                         rc = -EIO;
4872                 break;
4873         default:
4874                 rc = -ENXIO;
4875         }
4876
4877         if (!rc)
4878                 tpacpi_led_state_cache[led] = ledstatus;
4879
4880         return rc;
4881 }
4882
4883 static void led_set_status_worker(struct work_struct *work)
4884 {
4885         struct tpacpi_led_classdev *data =
4886                 container_of(work, struct tpacpi_led_classdev, work);
4887
4888         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4889                 led_set_status(data->led, data->new_state);
4890 }
4891
4892 static void led_sysfs_set(struct led_classdev *led_cdev,
4893                         enum led_brightness brightness)
4894 {
4895         struct tpacpi_led_classdev *data = container_of(led_cdev,
4896                              struct tpacpi_led_classdev, led_classdev);
4897
4898         if (brightness == LED_OFF)
4899                 data->new_state = TPACPI_LED_OFF;
4900         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4901                 data->new_state = TPACPI_LED_ON;
4902         else
4903                 data->new_state = TPACPI_LED_BLINK;
4904
4905         queue_work(tpacpi_wq, &data->work);
4906 }
4907
4908 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4909                         unsigned long *delay_on, unsigned long *delay_off)
4910 {
4911         struct tpacpi_led_classdev *data = container_of(led_cdev,
4912                              struct tpacpi_led_classdev, led_classdev);
4913
4914         /* Can we choose the flash rate? */
4915         if (*delay_on == 0 && *delay_off == 0) {
4916                 /* yes. set them to the hardware blink rate (1 Hz) */
4917                 *delay_on = 500; /* ms */
4918                 *delay_off = 500; /* ms */
4919         } else if ((*delay_on != 500) || (*delay_off != 500))
4920                 return -EINVAL;
4921
4922         data->new_state = TPACPI_LED_BLINK;
4923         queue_work(tpacpi_wq, &data->work);
4924
4925         return 0;
4926 }
4927
4928 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4929 {
4930         int rc;
4931
4932         struct tpacpi_led_classdev *data = container_of(led_cdev,
4933                              struct tpacpi_led_classdev, led_classdev);
4934
4935         rc = led_get_status(data->led);
4936
4937         if (rc == TPACPI_LED_OFF || rc < 0)
4938                 rc = LED_OFF;   /* no error handling in led class :( */
4939         else
4940                 rc = LED_FULL;
4941
4942         return rc;
4943 }
4944
4945 static void led_exit(void)
4946 {
4947         unsigned int i;
4948
4949         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4950                 if (tpacpi_leds[i].led_classdev.name)
4951                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4952         }
4953
4954         kfree(tpacpi_leds);
4955 }
4956
4957 static int __init tpacpi_init_led(unsigned int led)
4958 {
4959         int rc;
4960
4961         tpacpi_leds[led].led = led;
4962
4963         /* LEDs with no name don't get registered */
4964         if (!tpacpi_led_names[led])
4965                 return 0;
4966
4967         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4968         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4969         if (led_supported == TPACPI_LED_570)
4970                 tpacpi_leds[led].led_classdev.brightness_get =
4971                                                 &led_sysfs_get;
4972
4973         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4974
4975         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4976
4977         rc = led_classdev_register(&tpacpi_pdev->dev,
4978                                 &tpacpi_leds[led].led_classdev);
4979         if (rc < 0)
4980                 tpacpi_leds[led].led_classdev.name = NULL;
4981
4982         return rc;
4983 }
4984
4985 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4986         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4987         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4988         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
4989
4990         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
4991         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
4992         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
4993         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
4994         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
4995         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
4996         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
4997         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
4998
4999         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5000         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5001         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5002         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5003         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5004
5005         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5006         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5007         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5008         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5009
5010         /* (1) - may have excess leds enabled on MSB */
5011
5012         /* Defaults (order matters, keep last, don't reorder!) */
5013         { /* Lenovo */
5014           .vendor = PCI_VENDOR_ID_LENOVO,
5015           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5016           .quirks = 0x1fffU,
5017         },
5018         { /* IBM ThinkPads with no EC version string */
5019           .vendor = PCI_VENDOR_ID_IBM,
5020           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5021           .quirks = 0x00ffU,
5022         },
5023         { /* IBM ThinkPads with EC version string */
5024           .vendor = PCI_VENDOR_ID_IBM,
5025           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5026           .quirks = 0x00bfU,
5027         },
5028 };
5029
5030 #undef TPACPI_LEDQ_IBM
5031 #undef TPACPI_LEDQ_LNV
5032
5033 static int __init led_init(struct ibm_init_struct *iibm)
5034 {
5035         unsigned int i;
5036         int rc;
5037         unsigned long useful_leds;
5038
5039         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5040
5041         TPACPI_ACPIHANDLE_INIT(led);
5042
5043         if (!led_handle)
5044                 /* led not supported on R30, R31 */
5045                 led_supported = TPACPI_LED_NONE;
5046         else if (strlencmp(led_path, "SLED") == 0)
5047                 /* 570 */
5048                 led_supported = TPACPI_LED_570;
5049         else if (strlencmp(led_path, "SYSL") == 0)
5050                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5051                 led_supported = TPACPI_LED_OLD;
5052         else
5053                 /* all others */
5054                 led_supported = TPACPI_LED_NEW;
5055
5056         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5057                 str_supported(led_supported), led_supported);
5058
5059         if (led_supported == TPACPI_LED_NONE)
5060                 return 1;
5061
5062         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5063                               GFP_KERNEL);
5064         if (!tpacpi_leds) {
5065                 printk(TPACPI_ERR "Out of memory for LED data\n");
5066                 return -ENOMEM;
5067         }
5068
5069         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5070                                           ARRAY_SIZE(led_useful_qtable));
5071
5072         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5073                 if (!tpacpi_is_led_restricted(i) &&
5074                     test_bit(i, &useful_leds)) {
5075                         rc = tpacpi_init_led(i);
5076                         if (rc < 0) {
5077                                 led_exit();
5078                                 return rc;
5079                         }
5080                 }
5081         }
5082
5083 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5084         printk(TPACPI_NOTICE
5085                 "warning: userspace override of important "
5086                 "firmware LEDs is enabled\n");
5087 #endif
5088         return 0;
5089 }
5090
5091 #define str_led_status(s) \
5092         ((s) == TPACPI_LED_OFF ? "off" : \
5093                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5094
5095 static int led_read(char *p)
5096 {
5097         int len = 0;
5098
5099         if (!led_supported) {
5100                 len += sprintf(p + len, "status:\t\tnot supported\n");
5101                 return len;
5102         }
5103         len += sprintf(p + len, "status:\t\tsupported\n");
5104
5105         if (led_supported == TPACPI_LED_570) {
5106                 /* 570 */
5107                 int i, status;
5108                 for (i = 0; i < 8; i++) {
5109                         status = led_get_status(i);
5110                         if (status < 0)
5111                                 return -EIO;
5112                         len += sprintf(p + len, "%d:\t\t%s\n",
5113                                        i, str_led_status(status));
5114                 }
5115         }
5116
5117         len += sprintf(p + len, "commands:\t"
5118                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5119
5120         return len;
5121 }
5122
5123 static int led_write(char *buf)
5124 {
5125         char *cmd;
5126         int led, rc;
5127         enum led_status_t s;
5128
5129         if (!led_supported)
5130                 return -ENODEV;
5131
5132         while ((cmd = next_cmd(&buf))) {
5133                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5134                         return -EINVAL;
5135
5136                 if (strstr(cmd, "off")) {
5137                         s = TPACPI_LED_OFF;
5138                 } else if (strstr(cmd, "on")) {
5139                         s = TPACPI_LED_ON;
5140                 } else if (strstr(cmd, "blink")) {
5141                         s = TPACPI_LED_BLINK;
5142                 } else {
5143                         return -EINVAL;
5144                 }
5145
5146                 rc = led_set_status(led, s);
5147                 if (rc < 0)
5148                         return rc;
5149         }
5150
5151         return 0;
5152 }
5153
5154 static struct ibm_struct led_driver_data = {
5155         .name = "led",
5156         .read = led_read,
5157         .write = led_write,
5158         .exit = led_exit,
5159 };
5160
5161 /*************************************************************************
5162  * Beep subdriver
5163  */
5164
5165 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5166
5167 #define TPACPI_BEEP_Q1 0x0001
5168
5169 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5170         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5171         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5172 };
5173
5174 static int __init beep_init(struct ibm_init_struct *iibm)
5175 {
5176         unsigned long quirks;
5177
5178         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5179
5180         TPACPI_ACPIHANDLE_INIT(beep);
5181
5182         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5183                 str_supported(beep_handle != NULL));
5184
5185         quirks = tpacpi_check_quirks(beep_quirk_table,
5186                                      ARRAY_SIZE(beep_quirk_table));
5187
5188         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5189
5190         return (beep_handle)? 0 : 1;
5191 }
5192
5193 static int beep_read(char *p)
5194 {
5195         int len = 0;
5196
5197         if (!beep_handle)
5198                 len += sprintf(p + len, "status:\t\tnot supported\n");
5199         else {
5200                 len += sprintf(p + len, "status:\t\tsupported\n");
5201                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5202         }
5203
5204         return len;
5205 }
5206
5207 static int beep_write(char *buf)
5208 {
5209         char *cmd;
5210         int beep_cmd;
5211
5212         if (!beep_handle)
5213                 return -ENODEV;
5214
5215         while ((cmd = next_cmd(&buf))) {
5216                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5217                     beep_cmd >= 0 && beep_cmd <= 17) {
5218                         /* beep_cmd set */
5219                 } else
5220                         return -EINVAL;
5221                 if (tp_features.beep_needs_two_args) {
5222                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5223                                         beep_cmd, 0))
5224                                 return -EIO;
5225                 } else {
5226                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5227                                         beep_cmd))
5228                                 return -EIO;
5229                 }
5230         }
5231
5232         return 0;
5233 }
5234
5235 static struct ibm_struct beep_driver_data = {
5236         .name = "beep",
5237         .read = beep_read,
5238         .write = beep_write,
5239 };
5240
5241 /*************************************************************************
5242  * Thermal subdriver
5243  */
5244
5245 enum thermal_access_mode {
5246         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5247         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5248         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5249         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5250         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5251 };
5252
5253 enum { /* TPACPI_THERMAL_TPEC_* */
5254         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5255         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5256         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5257 };
5258
5259 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5260 struct ibm_thermal_sensors_struct {
5261         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5262 };
5263
5264 static enum thermal_access_mode thermal_read_mode;
5265
5266 /* idx is zero-based */
5267 static int thermal_get_sensor(int idx, s32 *value)
5268 {
5269         int t;
5270         s8 tmp;
5271         char tmpi[5];
5272
5273         t = TP_EC_THERMAL_TMP0;
5274
5275         switch (thermal_read_mode) {
5276 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5277         case TPACPI_THERMAL_TPEC_16:
5278                 if (idx >= 8 && idx <= 15) {
5279                         t = TP_EC_THERMAL_TMP8;
5280                         idx -= 8;
5281                 }
5282                 /* fallthrough */
5283 #endif
5284         case TPACPI_THERMAL_TPEC_8:
5285                 if (idx <= 7) {
5286                         if (!acpi_ec_read(t + idx, &tmp))
5287                                 return -EIO;
5288                         *value = tmp * 1000;
5289                         return 0;
5290                 }
5291                 break;
5292
5293         case TPACPI_THERMAL_ACPI_UPDT:
5294                 if (idx <= 7) {
5295                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5296                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5297                                 return -EIO;
5298                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5299                                 return -EIO;
5300                         *value = (t - 2732) * 100;
5301                         return 0;
5302                 }
5303                 break;
5304
5305         case TPACPI_THERMAL_ACPI_TMP07:
5306                 if (idx <= 7) {
5307                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5308                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5309                                 return -EIO;
5310                         if (t > 127 || t < -127)
5311                                 t = TP_EC_THERMAL_TMP_NA;
5312                         *value = t * 1000;
5313                         return 0;
5314                 }
5315                 break;
5316
5317         case TPACPI_THERMAL_NONE:
5318         default:
5319                 return -ENOSYS;
5320         }
5321
5322         return -EINVAL;
5323 }
5324
5325 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5326 {
5327         int res, i;
5328         int n;
5329
5330         n = 8;
5331         i = 0;
5332
5333         if (!s)
5334                 return -EINVAL;
5335
5336         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5337                 n = 16;
5338
5339         for (i = 0 ; i < n; i++) {
5340                 res = thermal_get_sensor(i, &s->temp[i]);
5341                 if (res)
5342                         return res;
5343         }
5344
5345         return n;
5346 }
5347
5348 /* sysfs temp##_input -------------------------------------------------- */
5349
5350 static ssize_t thermal_temp_input_show(struct device *dev,
5351                            struct device_attribute *attr,
5352                            char *buf)
5353 {
5354         struct sensor_device_attribute *sensor_attr =
5355                                         to_sensor_dev_attr(attr);
5356         int idx = sensor_attr->index;
5357         s32 value;
5358         int res;
5359
5360         res = thermal_get_sensor(idx, &value);
5361         if (res)
5362                 return res;
5363         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5364                 return -ENXIO;
5365
5366         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5367 }
5368
5369 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5370          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5371                      thermal_temp_input_show, NULL, _idxB)
5372
5373 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5374         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5375         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5376         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5377         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5378         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5379         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5380         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5381         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5382         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5383         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5384         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5385         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5386         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5387         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5388         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5389         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5390 };
5391
5392 #define THERMAL_ATTRS(X) \
5393         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5394
5395 static struct attribute *thermal_temp_input_attr[] = {
5396         THERMAL_ATTRS(8),
5397         THERMAL_ATTRS(9),
5398         THERMAL_ATTRS(10),
5399         THERMAL_ATTRS(11),
5400         THERMAL_ATTRS(12),
5401         THERMAL_ATTRS(13),
5402         THERMAL_ATTRS(14),
5403         THERMAL_ATTRS(15),
5404         THERMAL_ATTRS(0),
5405         THERMAL_ATTRS(1),
5406         THERMAL_ATTRS(2),
5407         THERMAL_ATTRS(3),
5408         THERMAL_ATTRS(4),
5409         THERMAL_ATTRS(5),
5410         THERMAL_ATTRS(6),
5411         THERMAL_ATTRS(7),
5412         NULL
5413 };
5414
5415 static const struct attribute_group thermal_temp_input16_group = {
5416         .attrs = thermal_temp_input_attr
5417 };
5418
5419 static const struct attribute_group thermal_temp_input8_group = {
5420         .attrs = &thermal_temp_input_attr[8]
5421 };
5422
5423 #undef THERMAL_SENSOR_ATTR_TEMP
5424 #undef THERMAL_ATTRS
5425
5426 /* --------------------------------------------------------------------- */
5427
5428 static int __init thermal_init(struct ibm_init_struct *iibm)
5429 {
5430         u8 t, ta1, ta2;
5431         int i;
5432         int acpi_tmp7;
5433         int res;
5434
5435         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5436
5437         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5438
5439         if (thinkpad_id.ec_model) {
5440                 /*
5441                  * Direct EC access mode: sensors at registers
5442                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5443                  * non-implemented, thermal sensors return 0x80 when
5444                  * not available
5445                  */
5446
5447                 ta1 = ta2 = 0;
5448                 for (i = 0; i < 8; i++) {
5449                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5450                                 ta1 |= t;
5451                         } else {
5452                                 ta1 = 0;
5453                                 break;
5454                         }
5455                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5456                                 ta2 |= t;
5457                         } else {
5458                                 ta1 = 0;
5459                                 break;
5460                         }
5461                 }
5462                 if (ta1 == 0) {
5463                         /* This is sheer paranoia, but we handle it anyway */
5464                         if (acpi_tmp7) {
5465                                 printk(TPACPI_ERR
5466                                        "ThinkPad ACPI EC access misbehaving, "
5467                                        "falling back to ACPI TMPx access "
5468                                        "mode\n");
5469                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5470                         } else {
5471                                 printk(TPACPI_ERR
5472                                        "ThinkPad ACPI EC access misbehaving, "
5473                                        "disabling thermal sensors access\n");
5474                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5475                         }
5476                 } else {
5477                         thermal_read_mode =
5478                             (ta2 != 0) ?
5479                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5480                 }
5481         } else if (acpi_tmp7) {
5482                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5483                         /* 600e/x, 770e, 770x */
5484                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5485                 } else {
5486                         /* Standard ACPI TMPx access, max 8 sensors */
5487                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5488                 }
5489         } else {
5490                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5491                 thermal_read_mode = TPACPI_THERMAL_NONE;
5492         }
5493
5494         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5495                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5496                 thermal_read_mode);
5497
5498         switch (thermal_read_mode) {
5499         case TPACPI_THERMAL_TPEC_16:
5500                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5501                                 &thermal_temp_input16_group);
5502                 if (res)
5503                         return res;
5504                 break;
5505         case TPACPI_THERMAL_TPEC_8:
5506         case TPACPI_THERMAL_ACPI_TMP07:
5507         case TPACPI_THERMAL_ACPI_UPDT:
5508                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5509                                 &thermal_temp_input8_group);
5510                 if (res)
5511                         return res;
5512                 break;
5513         case TPACPI_THERMAL_NONE:
5514         default:
5515                 return 1;
5516         }
5517
5518         return 0;
5519 }
5520
5521 static void thermal_exit(void)
5522 {
5523         switch (thermal_read_mode) {
5524         case TPACPI_THERMAL_TPEC_16:
5525                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5526                                    &thermal_temp_input16_group);
5527                 break;
5528         case TPACPI_THERMAL_TPEC_8:
5529         case TPACPI_THERMAL_ACPI_TMP07:
5530         case TPACPI_THERMAL_ACPI_UPDT:
5531                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5532                                    &thermal_temp_input16_group);
5533                 break;
5534         case TPACPI_THERMAL_NONE:
5535         default:
5536                 break;
5537         }
5538 }
5539
5540 static int thermal_read(char *p)
5541 {
5542         int len = 0;
5543         int n, i;
5544         struct ibm_thermal_sensors_struct t;
5545
5546         n = thermal_get_sensors(&t);
5547         if (unlikely(n < 0))
5548                 return n;
5549
5550         len += sprintf(p + len, "temperatures:\t");
5551
5552         if (n > 0) {
5553                 for (i = 0; i < (n - 1); i++)
5554                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5555                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5556         } else
5557                 len += sprintf(p + len, "not supported\n");
5558
5559         return len;
5560 }
5561
5562 static struct ibm_struct thermal_driver_data = {
5563         .name = "thermal",
5564         .read = thermal_read,
5565         .exit = thermal_exit,
5566 };
5567
5568 /*************************************************************************
5569  * EC Dump subdriver
5570  */
5571
5572 static u8 ecdump_regs[256];
5573
5574 static int ecdump_read(char *p)
5575 {
5576         int len = 0;
5577         int i, j;
5578         u8 v;
5579
5580         len += sprintf(p + len, "EC      "
5581                        " +00 +01 +02 +03 +04 +05 +06 +07"
5582                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5583         for (i = 0; i < 256; i += 16) {
5584                 len += sprintf(p + len, "EC 0x%02x:", i);
5585                 for (j = 0; j < 16; j++) {
5586                         if (!acpi_ec_read(i + j, &v))
5587                                 break;
5588                         if (v != ecdump_regs[i + j])
5589                                 len += sprintf(p + len, " *%02x", v);
5590                         else
5591                                 len += sprintf(p + len, "  %02x", v);
5592                         ecdump_regs[i + j] = v;
5593                 }
5594                 len += sprintf(p + len, "\n");
5595                 if (j != 16)
5596                         break;
5597         }
5598
5599         /* These are way too dangerous to advertise openly... */
5600 #if 0
5601         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5602                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5603         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5604                        " (<offset> is 00-ff, <value> is 0-255)\n");
5605 #endif
5606         return len;
5607 }
5608
5609 static int ecdump_write(char *buf)
5610 {
5611         char *cmd;
5612         int i, v;
5613
5614         while ((cmd = next_cmd(&buf))) {
5615                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5616                         /* i and v set */
5617                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5618                         /* i and v set */
5619                 } else
5620                         return -EINVAL;
5621                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5622                         if (!acpi_ec_write(i, v))
5623                                 return -EIO;
5624                 } else
5625                         return -EINVAL;
5626         }
5627
5628         return 0;
5629 }
5630
5631 static struct ibm_struct ecdump_driver_data = {
5632         .name = "ecdump",
5633         .read = ecdump_read,
5634         .write = ecdump_write,
5635         .flags.experimental = 1,
5636 };
5637
5638 /*************************************************************************
5639  * Backlight/brightness subdriver
5640  */
5641
5642 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5643
5644 /*
5645  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5646  * CMOS NVRAM byte 0x5E, bits 0-3.
5647  *
5648  * EC HBRV (0x31) has the following layout
5649  *   Bit 7: unknown function
5650  *   Bit 6: unknown function
5651  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5652  *   Bit 4: must be set to zero to avoid problems
5653  *   Bit 3-0: backlight brightness level
5654  *
5655  * brightness_get_raw returns status data in the HBRV layout
5656  *
5657  * WARNING: The X61 has been verified to use HBRV for something else, so
5658  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5659  * testing on the very early *60 Lenovo models...
5660  */
5661
5662 enum {
5663         TP_EC_BACKLIGHT = 0x31,
5664
5665         /* TP_EC_BACKLIGHT bitmasks */
5666         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5667         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5668         TP_EC_BACKLIGHT_MAPSW = 0x20,
5669 };
5670
5671 enum tpacpi_brightness_access_mode {
5672         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5673         TPACPI_BRGHT_MODE_EC,           /* EC control */
5674         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5675         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5676         TPACPI_BRGHT_MODE_MAX
5677 };
5678
5679 static struct backlight_device *ibm_backlight_device;
5680
5681 static enum tpacpi_brightness_access_mode brightness_mode =
5682                 TPACPI_BRGHT_MODE_MAX;
5683
5684 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5685
5686 static struct mutex brightness_mutex;
5687
5688 /* NVRAM brightness access,
5689  * call with brightness_mutex held! */
5690 static unsigned int tpacpi_brightness_nvram_get(void)
5691 {
5692         u8 lnvram;
5693
5694         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5695                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5696                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5697         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5698
5699         return lnvram;
5700 }
5701
5702 static void tpacpi_brightness_checkpoint_nvram(void)
5703 {
5704         u8 lec = 0;
5705         u8 b_nvram;
5706
5707         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5708                 return;
5709
5710         vdbg_printk(TPACPI_DBG_BRGHT,
5711                 "trying to checkpoint backlight level to NVRAM...\n");
5712
5713         if (mutex_lock_killable(&brightness_mutex) < 0)
5714                 return;
5715
5716         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5717                 goto unlock;
5718         lec &= TP_EC_BACKLIGHT_LVLMSK;
5719         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5720
5721         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5722                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5723                 /* NVRAM needs update */
5724                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5725                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5726                 b_nvram |= lec;
5727                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5728                 dbg_printk(TPACPI_DBG_BRGHT,
5729                            "updated NVRAM backlight level to %u (0x%02x)\n",
5730                            (unsigned int) lec, (unsigned int) b_nvram);
5731         } else
5732                 vdbg_printk(TPACPI_DBG_BRGHT,
5733                            "NVRAM backlight level already is %u (0x%02x)\n",
5734                            (unsigned int) lec, (unsigned int) b_nvram);
5735
5736 unlock:
5737         mutex_unlock(&brightness_mutex);
5738 }
5739
5740
5741 /* call with brightness_mutex held! */
5742 static int tpacpi_brightness_get_raw(int *status)
5743 {
5744         u8 lec = 0;
5745
5746         switch (brightness_mode) {
5747         case TPACPI_BRGHT_MODE_UCMS_STEP:
5748                 *status = tpacpi_brightness_nvram_get();
5749                 return 0;
5750         case TPACPI_BRGHT_MODE_EC:
5751         case TPACPI_BRGHT_MODE_ECNVRAM:
5752                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5753                         return -EIO;
5754                 *status = lec;
5755                 return 0;
5756         default:
5757                 return -ENXIO;
5758         }
5759 }
5760
5761 /* call with brightness_mutex held! */
5762 /* do NOT call with illegal backlight level value */
5763 static int tpacpi_brightness_set_ec(unsigned int value)
5764 {
5765         u8 lec = 0;
5766
5767         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5768                 return -EIO;
5769
5770         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5771                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5772                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5773                 return -EIO;
5774
5775         return 0;
5776 }
5777
5778 /* call with brightness_mutex held! */
5779 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5780 {
5781         int cmos_cmd, inc;
5782         unsigned int current_value, i;
5783
5784         current_value = tpacpi_brightness_nvram_get();
5785
5786         if (value == current_value)
5787                 return 0;
5788
5789         cmos_cmd = (value > current_value) ?
5790                         TP_CMOS_BRIGHTNESS_UP :
5791                         TP_CMOS_BRIGHTNESS_DOWN;
5792         inc = (value > current_value) ? 1 : -1;
5793
5794         for (i = current_value; i != value; i += inc)
5795                 if (issue_thinkpad_cmos_command(cmos_cmd))
5796                         return -EIO;
5797
5798         return 0;
5799 }
5800
5801 /* May return EINTR which can always be mapped to ERESTARTSYS */
5802 static int brightness_set(unsigned int value)
5803 {
5804         int res;
5805
5806         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5807             value < 0)
5808                 return -EINVAL;
5809
5810         vdbg_printk(TPACPI_DBG_BRGHT,
5811                         "set backlight level to %d\n", value);
5812
5813         res = mutex_lock_killable(&brightness_mutex);
5814         if (res < 0)
5815                 return res;
5816
5817         switch (brightness_mode) {
5818         case TPACPI_BRGHT_MODE_EC:
5819         case TPACPI_BRGHT_MODE_ECNVRAM:
5820                 res = tpacpi_brightness_set_ec(value);
5821                 break;
5822         case TPACPI_BRGHT_MODE_UCMS_STEP:
5823                 res = tpacpi_brightness_set_ucmsstep(value);
5824                 break;
5825         default:
5826                 res = -ENXIO;
5827         }
5828
5829         mutex_unlock(&brightness_mutex);
5830         return res;
5831 }
5832
5833 /* sysfs backlight class ----------------------------------------------- */
5834
5835 static int brightness_update_status(struct backlight_device *bd)
5836 {
5837         unsigned int level =
5838                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5839                  bd->props.power == FB_BLANK_UNBLANK) ?
5840                                 bd->props.brightness : 0;
5841
5842         dbg_printk(TPACPI_DBG_BRGHT,
5843                         "backlight: attempt to set level to %d\n",
5844                         level);
5845
5846         /* it is the backlight class's job (caller) to handle
5847          * EINTR and other errors properly */
5848         return brightness_set(level);
5849 }
5850
5851 static int brightness_get(struct backlight_device *bd)
5852 {
5853         int status, res;
5854
5855         res = mutex_lock_killable(&brightness_mutex);
5856         if (res < 0)
5857                 return 0;
5858
5859         res = tpacpi_brightness_get_raw(&status);
5860
5861         mutex_unlock(&brightness_mutex);
5862
5863         if (res < 0)
5864                 return 0;
5865
5866         return status & TP_EC_BACKLIGHT_LVLMSK;
5867 }
5868
5869 static struct backlight_ops ibm_backlight_data = {
5870         .get_brightness = brightness_get,
5871         .update_status  = brightness_update_status,
5872 };
5873
5874 /* --------------------------------------------------------------------- */
5875
5876 /*
5877  * These are only useful for models that have only one possibility
5878  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5879  * these quirks.
5880  */
5881 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5882 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5883 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5884
5885 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5886         /* Models with ATI GPUs known to require ECNVRAM mode */
5887         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5888
5889         /* Models with ATI GPUs that can use ECNVRAM */
5890         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5891         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5892         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5893         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5894
5895         /* Models with Intel Extreme Graphics 2 */
5896         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5897         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5898         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5899
5900         /* Models with Intel GMA900 */
5901         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5902         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5903         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5904 };
5905
5906 static int __init brightness_init(struct ibm_init_struct *iibm)
5907 {
5908         int b;
5909         unsigned long quirks;
5910
5911         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5912
5913         mutex_init(&brightness_mutex);
5914
5915         quirks = tpacpi_check_quirks(brightness_quirk_table,
5916                                 ARRAY_SIZE(brightness_quirk_table));
5917
5918         /*
5919          * We always attempt to detect acpi support, so as to switch
5920          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5921          * going to publish a backlight interface
5922          */
5923         b = tpacpi_check_std_acpi_brightness_support();
5924         if (b > 0) {
5925
5926                 if (acpi_video_backlight_support()) {
5927                         if (brightness_enable > 1) {
5928                                 printk(TPACPI_NOTICE
5929                                        "Standard ACPI backlight interface "
5930                                        "available, not loading native one.\n");
5931                                 return 1;
5932                         } else if (brightness_enable == 1) {
5933                                 printk(TPACPI_NOTICE
5934                                        "Backlight control force enabled, even if standard "
5935                                        "ACPI backlight interface is available\n");
5936                         }
5937                 } else {
5938                         if (brightness_enable > 1) {
5939                                 printk(TPACPI_NOTICE
5940                                        "Standard ACPI backlight interface not "
5941                                        "available, thinkpad_acpi native "
5942                                        "brightness control enabled\n");
5943                         }
5944                 }
5945         }
5946
5947         if (!brightness_enable) {
5948                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5949                            "brightness support disabled by "
5950                            "module parameter\n");
5951                 return 1;
5952         }
5953
5954         if (b > 16) {
5955                 printk(TPACPI_ERR
5956                        "Unsupported brightness interface, "
5957                        "please contact %s\n", TPACPI_MAIL);
5958                 return 1;
5959         }
5960         if (b == 16)
5961                 tp_features.bright_16levels = 1;
5962
5963         /*
5964          * Check for module parameter bogosity, note that we
5965          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5966          * able to detect "unspecified"
5967          */
5968         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5969                 return -EINVAL;
5970
5971         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5972         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5973             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5974                 if (quirks & TPACPI_BRGHT_Q_EC)
5975                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5976                 else
5977                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5978
5979                 dbg_printk(TPACPI_DBG_BRGHT,
5980                            "driver auto-selected brightness_mode=%d\n",
5981                            brightness_mode);
5982         }
5983
5984         /* Safety */
5985         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5986             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5987              brightness_mode == TPACPI_BRGHT_MODE_EC))
5988                 return -EINVAL;
5989
5990         if (tpacpi_brightness_get_raw(&b) < 0)
5991                 return 1;
5992
5993         if (tp_features.bright_16levels)
5994                 printk(TPACPI_INFO
5995                        "detected a 16-level brightness capable ThinkPad\n");
5996
5997         ibm_backlight_device = backlight_device_register(
5998                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5999                                         &ibm_backlight_data);
6000         if (IS_ERR(ibm_backlight_device)) {
6001                 printk(TPACPI_ERR "Could not register backlight device\n");
6002                 return PTR_ERR(ibm_backlight_device);
6003         }
6004         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6005                         "brightness is supported\n");
6006
6007         if (quirks & TPACPI_BRGHT_Q_ASK) {
6008                 printk(TPACPI_NOTICE
6009                         "brightness: will use unverified default: "
6010                         "brightness_mode=%d\n", brightness_mode);
6011                 printk(TPACPI_NOTICE
6012                         "brightness: please report to %s whether it works well "
6013                         "or not on your ThinkPad\n", TPACPI_MAIL);
6014         }
6015
6016         ibm_backlight_device->props.max_brightness =
6017                                 (tp_features.bright_16levels)? 15 : 7;
6018         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6019         backlight_update_status(ibm_backlight_device);
6020
6021         return 0;
6022 }
6023
6024 static void brightness_suspend(pm_message_t state)
6025 {
6026         tpacpi_brightness_checkpoint_nvram();
6027 }
6028
6029 static void brightness_shutdown(void)
6030 {
6031         tpacpi_brightness_checkpoint_nvram();
6032 }
6033
6034 static void brightness_exit(void)
6035 {
6036         if (ibm_backlight_device) {
6037                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6038                             "calling backlight_device_unregister()\n");
6039                 backlight_device_unregister(ibm_backlight_device);
6040         }
6041
6042         tpacpi_brightness_checkpoint_nvram();
6043 }
6044
6045 static int brightness_read(char *p)
6046 {
6047         int len = 0;
6048         int level;
6049
6050         level = brightness_get(NULL);
6051         if (level < 0) {
6052                 len += sprintf(p + len, "level:\t\tunreadable\n");
6053         } else {
6054                 len += sprintf(p + len, "level:\t\t%d\n", level);
6055                 len += sprintf(p + len, "commands:\tup, down\n");
6056                 len += sprintf(p + len, "commands:\tlevel <level>"
6057                                " (<level> is 0-%d)\n",
6058                                (tp_features.bright_16levels) ? 15 : 7);
6059         }
6060
6061         return len;
6062 }
6063
6064 static int brightness_write(char *buf)
6065 {
6066         int level;
6067         int rc;
6068         char *cmd;
6069         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6070
6071         level = brightness_get(NULL);
6072         if (level < 0)
6073                 return level;
6074
6075         while ((cmd = next_cmd(&buf))) {
6076                 if (strlencmp(cmd, "up") == 0) {
6077                         if (level < max_level)
6078                                 level++;
6079                 } else if (strlencmp(cmd, "down") == 0) {
6080                         if (level > 0)
6081                                 level--;
6082                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6083                            level >= 0 && level <= max_level) {
6084                         /* new level set */
6085                 } else
6086                         return -EINVAL;
6087         }
6088
6089         tpacpi_disclose_usertask("procfs brightness",
6090                         "set level to %d\n", level);
6091
6092         /*
6093          * Now we know what the final level should be, so we try to set it.
6094          * Doing it this way makes the syscall restartable in case of EINTR
6095          */
6096         rc = brightness_set(level);
6097         return (rc == -EINTR)? ERESTARTSYS : rc;
6098 }
6099
6100 static struct ibm_struct brightness_driver_data = {
6101         .name = "brightness",
6102         .read = brightness_read,
6103         .write = brightness_write,
6104         .exit = brightness_exit,
6105         .suspend = brightness_suspend,
6106         .shutdown = brightness_shutdown,
6107 };
6108
6109 /*************************************************************************
6110  * Volume subdriver
6111  */
6112
6113 static int volume_offset = 0x30;
6114
6115 static int volume_read(char *p)
6116 {
6117         int len = 0;
6118         u8 level;
6119
6120         if (!acpi_ec_read(volume_offset, &level)) {
6121                 len += sprintf(p + len, "level:\t\tunreadable\n");
6122         } else {
6123                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6124                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6125                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6126                 len += sprintf(p + len, "commands:\tlevel <level>"
6127                                " (<level> is 0-15)\n");
6128         }
6129
6130         return len;
6131 }
6132
6133 static int volume_write(char *buf)
6134 {
6135         int cmos_cmd, inc, i;
6136         u8 level, mute;
6137         int new_level, new_mute;
6138         char *cmd;
6139
6140         while ((cmd = next_cmd(&buf))) {
6141                 if (!acpi_ec_read(volume_offset, &level))
6142                         return -EIO;
6143                 new_mute = mute = level & 0x40;
6144                 new_level = level = level & 0xf;
6145
6146                 if (strlencmp(cmd, "up") == 0) {
6147                         if (mute)
6148                                 new_mute = 0;
6149                         else
6150                                 new_level = level == 15 ? 15 : level + 1;
6151                 } else if (strlencmp(cmd, "down") == 0) {
6152                         if (mute)
6153                                 new_mute = 0;
6154                         else
6155                                 new_level = level == 0 ? 0 : level - 1;
6156                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6157                            new_level >= 0 && new_level <= 15) {
6158                         /* new_level set */
6159                 } else if (strlencmp(cmd, "mute") == 0) {
6160                         new_mute = 0x40;
6161                 } else
6162                         return -EINVAL;
6163
6164                 if (new_level != level) {
6165                         /* mute doesn't change */
6166
6167                         cmos_cmd = (new_level > level) ?
6168                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6169                         inc = new_level > level ? 1 : -1;
6170
6171                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6172                                      !acpi_ec_write(volume_offset, level)))
6173                                 return -EIO;
6174
6175                         for (i = level; i != new_level; i += inc)
6176                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6177                                     !acpi_ec_write(volume_offset, i + inc))
6178                                         return -EIO;
6179
6180                         if (mute &&
6181                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6182                              !acpi_ec_write(volume_offset, new_level + mute))) {
6183                                 return -EIO;
6184                         }
6185                 }
6186
6187                 if (new_mute != mute) {
6188                         /* level doesn't change */
6189
6190                         cmos_cmd = (new_mute) ?
6191                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6192
6193                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6194                             !acpi_ec_write(volume_offset, level + new_mute))
6195                                 return -EIO;
6196                 }
6197         }
6198
6199         return 0;
6200 }
6201
6202 static struct ibm_struct volume_driver_data = {
6203         .name = "volume",
6204         .read = volume_read,
6205         .write = volume_write,
6206 };
6207
6208 /*************************************************************************
6209  * Fan subdriver
6210  */
6211
6212 /*
6213  * FAN ACCESS MODES
6214  *
6215  * TPACPI_FAN_RD_ACPI_GFAN:
6216  *      ACPI GFAN method: returns fan level
6217  *
6218  *      see TPACPI_FAN_WR_ACPI_SFAN
6219  *      EC 0x2f (HFSP) not available if GFAN exists
6220  *
6221  * TPACPI_FAN_WR_ACPI_SFAN:
6222  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6223  *
6224  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6225  *      it for writing.
6226  *
6227  * TPACPI_FAN_WR_TPEC:
6228  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6229  *      Supported on almost all ThinkPads
6230  *
6231  *      Fan speed changes of any sort (including those caused by the
6232  *      disengaged mode) are usually done slowly by the firmware as the
6233  *      maximum ammount of fan duty cycle change per second seems to be
6234  *      limited.
6235  *
6236  *      Reading is not available if GFAN exists.
6237  *      Writing is not available if SFAN exists.
6238  *
6239  *      Bits
6240  *       7      automatic mode engaged;
6241  *              (default operation mode of the ThinkPad)
6242  *              fan level is ignored in this mode.
6243  *       6      full speed mode (takes precedence over bit 7);
6244  *              not available on all thinkpads.  May disable
6245  *              the tachometer while the fan controller ramps up
6246  *              the speed (which can take up to a few *minutes*).
6247  *              Speeds up fan to 100% duty-cycle, which is far above
6248  *              the standard RPM levels.  It is not impossible that
6249  *              it could cause hardware damage.
6250  *      5-3     unused in some models.  Extra bits for fan level
6251  *              in others, but still useless as all values above
6252  *              7 map to the same speed as level 7 in these models.
6253  *      2-0     fan level (0..7 usually)
6254  *                      0x00 = stop
6255  *                      0x07 = max (set when temperatures critical)
6256  *              Some ThinkPads may have other levels, see
6257  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6258  *
6259  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6260  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6261  *      does so, its initial value is meaningless (0x07).
6262  *
6263  *      For firmware bugs, refer to:
6264  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6265  *
6266  *      ----
6267  *
6268  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6269  *      Main fan tachometer reading (in RPM)
6270  *
6271  *      This register is present on all ThinkPads with a new-style EC, and
6272  *      it is known not to be present on the A21m/e, and T22, as there is
6273  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6274  *      ThinkPads from this same time period (and earlier) probably lack the
6275  *      tachometer as well.
6276  *
6277  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6278  *      was never fixed by IBM to report the EC firmware version string
6279  *      probably support the tachometer (like the early X models), so
6280  *      detecting it is quite hard.  We need more data to know for sure.
6281  *
6282  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6283  *      might result.
6284  *
6285  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6286  *      mode.
6287  *
6288  *      For firmware bugs, refer to:
6289  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6290  *
6291  *      ----
6292  *
6293  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6294  *
6295  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6296  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6297  *      is one, the tachometer registers show the speed of the auxiliary
6298  *      fan.
6299  *
6300  *      Fan control seems to affect both fans, regardless of the state
6301  *      of this bit.
6302  *
6303  *      So far, only the firmware for the X60/X61 non-tablet versions
6304  *      seem to support this (firmware TP-7M).
6305  *
6306  * TPACPI_FAN_WR_ACPI_FANS:
6307  *      ThinkPad X31, X40, X41.  Not available in the X60.
6308  *
6309  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6310  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6311  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6312  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6313  *
6314  *      The speeds are stored on handles
6315  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6316  *
6317  *      There are three default speed sets, acessible as handles:
6318  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6319  *
6320  *      ACPI DSDT switches which set is in use depending on various
6321  *      factors.
6322  *
6323  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6324  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6325  *      but the ACPI tables just mention level 7.
6326  */
6327
6328 enum {                                  /* Fan control constants */
6329         fan_status_offset = 0x2f,       /* EC register 0x2f */
6330         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6331                                          * 0x84 must be read before 0x85 */
6332         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6333                                            bit 0 selects which fan is active */
6334
6335         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6336         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6337
6338         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6339 };
6340
6341 enum fan_status_access_mode {
6342         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6343         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6344         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6345 };
6346
6347 enum fan_control_access_mode {
6348         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6349         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6350         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6351         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6352 };
6353
6354 enum fan_control_commands {
6355         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6356         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6357         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6358                                                  * and also watchdog cmd */
6359 };
6360
6361 static int fan_control_allowed;
6362
6363 static enum fan_status_access_mode fan_status_access_mode;
6364 static enum fan_control_access_mode fan_control_access_mode;
6365 static enum fan_control_commands fan_control_commands;
6366
6367 static u8 fan_control_initial_status;
6368 static u8 fan_control_desired_level;
6369 static u8 fan_control_resume_level;
6370 static int fan_watchdog_maxinterval;
6371
6372 static struct mutex fan_mutex;
6373
6374 static void fan_watchdog_fire(struct work_struct *ignored);
6375 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6376
6377 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6378 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6379            "\\FSPD",            /* 600e/x, 770e, 770x */
6380            );                   /* all others */
6381 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6382            "JFNS",              /* 770x-JL */
6383            );                   /* all others */
6384
6385 /*
6386  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6387  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6388  * be in auto mode (0x80).
6389  *
6390  * This is corrected by any write to HFSP either by the driver, or
6391  * by the firmware.
6392  *
6393  * We assume 0x07 really means auto mode while this quirk is active,
6394  * as this is far more likely than the ThinkPad being in level 7,
6395  * which is only used by the firmware during thermal emergencies.
6396  *
6397  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6398  * TP-70 (T43, R52), which are known to be buggy.
6399  */
6400
6401 static void fan_quirk1_setup(void)
6402 {
6403         if (fan_control_initial_status == 0x07) {
6404                 printk(TPACPI_NOTICE
6405                        "fan_init: initial fan status is unknown, "
6406                        "assuming it is in auto mode\n");
6407                 tp_features.fan_ctrl_status_undef = 1;
6408         }
6409 }
6410
6411 static void fan_quirk1_handle(u8 *fan_status)
6412 {
6413         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6414                 if (*fan_status != fan_control_initial_status) {
6415                         /* something changed the HFSP regisnter since
6416                          * driver init time, so it is not undefined
6417                          * anymore */
6418                         tp_features.fan_ctrl_status_undef = 0;
6419                 } else {
6420                         /* Return most likely status. In fact, it
6421                          * might be the only possible status */
6422                         *fan_status = TP_EC_FAN_AUTO;
6423                 }
6424         }
6425 }
6426
6427 /* Select main fan on X60/X61, NOOP on others */
6428 static bool fan_select_fan1(void)
6429 {
6430         if (tp_features.second_fan) {
6431                 u8 val;
6432
6433                 if (ec_read(fan_select_offset, &val) < 0)
6434                         return false;
6435                 val &= 0xFEU;
6436                 if (ec_write(fan_select_offset, val) < 0)
6437                         return false;
6438         }
6439         return true;
6440 }
6441
6442 /* Select secondary fan on X60/X61 */
6443 static bool fan_select_fan2(void)
6444 {
6445         u8 val;
6446
6447         if (!tp_features.second_fan)
6448                 return false;
6449
6450         if (ec_read(fan_select_offset, &val) < 0)
6451                 return false;
6452         val |= 0x01U;
6453         if (ec_write(fan_select_offset, val) < 0)
6454                 return false;
6455
6456         return true;
6457 }
6458
6459 /*
6460  * Call with fan_mutex held
6461  */
6462 static void fan_update_desired_level(u8 status)
6463 {
6464         if ((status &
6465              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6466                 if (status > 7)
6467                         fan_control_desired_level = 7;
6468                 else
6469                         fan_control_desired_level = status;
6470         }
6471 }
6472
6473 static int fan_get_status(u8 *status)
6474 {
6475         u8 s;
6476
6477         /* TODO:
6478          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6479
6480         switch (fan_status_access_mode) {
6481         case TPACPI_FAN_RD_ACPI_GFAN:
6482                 /* 570, 600e/x, 770e, 770x */
6483
6484                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6485                         return -EIO;
6486
6487                 if (likely(status))
6488                         *status = s & 0x07;
6489
6490                 break;
6491
6492         case TPACPI_FAN_RD_TPEC:
6493                 /* all except 570, 600e/x, 770e, 770x */
6494                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6495                         return -EIO;
6496
6497                 if (likely(status)) {
6498                         *status = s;
6499                         fan_quirk1_handle(status);
6500                 }
6501
6502                 break;
6503
6504         default:
6505                 return -ENXIO;
6506         }
6507
6508         return 0;
6509 }
6510
6511 static int fan_get_status_safe(u8 *status)
6512 {
6513         int rc;
6514         u8 s;
6515
6516         if (mutex_lock_killable(&fan_mutex))
6517                 return -ERESTARTSYS;
6518         rc = fan_get_status(&s);
6519         if (!rc)
6520                 fan_update_desired_level(s);
6521         mutex_unlock(&fan_mutex);
6522
6523         if (status)
6524                 *status = s;
6525
6526         return rc;
6527 }
6528
6529 static int fan_get_speed(unsigned int *speed)
6530 {
6531         u8 hi, lo;
6532
6533         switch (fan_status_access_mode) {
6534         case TPACPI_FAN_RD_TPEC:
6535                 /* all except 570, 600e/x, 770e, 770x */
6536                 if (unlikely(!fan_select_fan1()))
6537                         return -EIO;
6538                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6539                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6540                         return -EIO;
6541
6542                 if (likely(speed))
6543                         *speed = (hi << 8) | lo;
6544
6545                 break;
6546
6547         default:
6548                 return -ENXIO;
6549         }
6550
6551         return 0;
6552 }
6553
6554 static int fan2_get_speed(unsigned int *speed)
6555 {
6556         u8 hi, lo;
6557         bool rc;
6558
6559         switch (fan_status_access_mode) {
6560         case TPACPI_FAN_RD_TPEC:
6561                 /* all except 570, 600e/x, 770e, 770x */
6562                 if (unlikely(!fan_select_fan2()))
6563                         return -EIO;
6564                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6565                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6566                 fan_select_fan1(); /* play it safe */
6567                 if (rc)
6568                         return -EIO;
6569
6570                 if (likely(speed))
6571                         *speed = (hi << 8) | lo;
6572
6573                 break;
6574
6575         default:
6576                 return -ENXIO;
6577         }
6578
6579         return 0;
6580 }
6581
6582 static int fan_set_level(int level)
6583 {
6584         if (!fan_control_allowed)
6585                 return -EPERM;
6586
6587         switch (fan_control_access_mode) {
6588         case TPACPI_FAN_WR_ACPI_SFAN:
6589                 if (level >= 0 && level <= 7) {
6590                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6591                                 return -EIO;
6592                 } else
6593                         return -EINVAL;
6594                 break;
6595
6596         case TPACPI_FAN_WR_ACPI_FANS:
6597         case TPACPI_FAN_WR_TPEC:
6598                 if (!(level & TP_EC_FAN_AUTO) &&
6599                     !(level & TP_EC_FAN_FULLSPEED) &&
6600                     ((level < 0) || (level > 7)))
6601                         return -EINVAL;
6602
6603                 /* safety net should the EC not support AUTO
6604                  * or FULLSPEED mode bits and just ignore them */
6605                 if (level & TP_EC_FAN_FULLSPEED)
6606                         level |= 7;     /* safety min speed 7 */
6607                 else if (level & TP_EC_FAN_AUTO)
6608                         level |= 4;     /* safety min speed 4 */
6609
6610                 if (!acpi_ec_write(fan_status_offset, level))
6611                         return -EIO;
6612                 else
6613                         tp_features.fan_ctrl_status_undef = 0;
6614                 break;
6615
6616         default:
6617                 return -ENXIO;
6618         }
6619
6620         vdbg_printk(TPACPI_DBG_FAN,
6621                 "fan control: set fan control register to 0x%02x\n", level);
6622         return 0;
6623 }
6624
6625 static int fan_set_level_safe(int level)
6626 {
6627         int rc;
6628
6629         if (!fan_control_allowed)
6630                 return -EPERM;
6631
6632         if (mutex_lock_killable(&fan_mutex))
6633                 return -ERESTARTSYS;
6634
6635         if (level == TPACPI_FAN_LAST_LEVEL)
6636                 level = fan_control_desired_level;
6637
6638         rc = fan_set_level(level);
6639         if (!rc)
6640                 fan_update_desired_level(level);
6641
6642         mutex_unlock(&fan_mutex);
6643         return rc;
6644 }
6645
6646 static int fan_set_enable(void)
6647 {
6648         u8 s;
6649         int rc;
6650
6651         if (!fan_control_allowed)
6652                 return -EPERM;
6653
6654         if (mutex_lock_killable(&fan_mutex))
6655                 return -ERESTARTSYS;
6656
6657         switch (fan_control_access_mode) {
6658         case TPACPI_FAN_WR_ACPI_FANS:
6659         case TPACPI_FAN_WR_TPEC:
6660                 rc = fan_get_status(&s);
6661                 if (rc < 0)
6662                         break;
6663
6664                 /* Don't go out of emergency fan mode */
6665                 if (s != 7) {
6666                         s &= 0x07;
6667                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6668                 }
6669
6670                 if (!acpi_ec_write(fan_status_offset, s))
6671                         rc = -EIO;
6672                 else {
6673                         tp_features.fan_ctrl_status_undef = 0;
6674                         rc = 0;
6675                 }
6676                 break;
6677
6678         case TPACPI_FAN_WR_ACPI_SFAN:
6679                 rc = fan_get_status(&s);
6680                 if (rc < 0)
6681                         break;
6682
6683                 s &= 0x07;
6684
6685                 /* Set fan to at least level 4 */
6686                 s |= 4;
6687
6688                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6689                         rc = -EIO;
6690                 else
6691                         rc = 0;
6692                 break;
6693
6694         default:
6695                 rc = -ENXIO;
6696         }
6697
6698         mutex_unlock(&fan_mutex);
6699
6700         if (!rc)
6701                 vdbg_printk(TPACPI_DBG_FAN,
6702                         "fan control: set fan control register to 0x%02x\n",
6703                         s);
6704         return rc;
6705 }
6706
6707 static int fan_set_disable(void)
6708 {
6709         int rc;
6710
6711         if (!fan_control_allowed)
6712                 return -EPERM;
6713
6714         if (mutex_lock_killable(&fan_mutex))
6715                 return -ERESTARTSYS;
6716
6717         rc = 0;
6718         switch (fan_control_access_mode) {
6719         case TPACPI_FAN_WR_ACPI_FANS:
6720         case TPACPI_FAN_WR_TPEC:
6721                 if (!acpi_ec_write(fan_status_offset, 0x00))
6722                         rc = -EIO;
6723                 else {
6724                         fan_control_desired_level = 0;
6725                         tp_features.fan_ctrl_status_undef = 0;
6726                 }
6727                 break;
6728
6729         case TPACPI_FAN_WR_ACPI_SFAN:
6730                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6731                         rc = -EIO;
6732                 else
6733                         fan_control_desired_level = 0;
6734                 break;
6735
6736         default:
6737                 rc = -ENXIO;
6738         }
6739
6740         if (!rc)
6741                 vdbg_printk(TPACPI_DBG_FAN,
6742                         "fan control: set fan control register to 0\n");
6743
6744         mutex_unlock(&fan_mutex);
6745         return rc;
6746 }
6747
6748 static int fan_set_speed(int speed)
6749 {
6750         int rc;
6751
6752         if (!fan_control_allowed)
6753                 return -EPERM;
6754
6755         if (mutex_lock_killable(&fan_mutex))
6756                 return -ERESTARTSYS;
6757
6758         rc = 0;
6759         switch (fan_control_access_mode) {
6760         case TPACPI_FAN_WR_ACPI_FANS:
6761                 if (speed >= 0 && speed <= 65535) {
6762                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6763                                         speed, speed, speed))
6764                                 rc = -EIO;
6765                 } else
6766                         rc = -EINVAL;
6767                 break;
6768
6769         default:
6770                 rc = -ENXIO;
6771         }
6772
6773         mutex_unlock(&fan_mutex);
6774         return rc;
6775 }
6776
6777 static void fan_watchdog_reset(void)
6778 {
6779         static int fan_watchdog_active;
6780
6781         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6782                 return;
6783
6784         if (fan_watchdog_active)
6785                 cancel_delayed_work(&fan_watchdog_task);
6786
6787         if (fan_watchdog_maxinterval > 0 &&
6788             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6789                 fan_watchdog_active = 1;
6790                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6791                                 msecs_to_jiffies(fan_watchdog_maxinterval
6792                                                  * 1000))) {
6793                         printk(TPACPI_ERR
6794                                "failed to queue the fan watchdog, "
6795                                "watchdog will not trigger\n");
6796                 }
6797         } else
6798                 fan_watchdog_active = 0;
6799 }
6800
6801 static void fan_watchdog_fire(struct work_struct *ignored)
6802 {
6803         int rc;
6804
6805         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6806                 return;
6807
6808         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6809         rc = fan_set_enable();
6810         if (rc < 0) {
6811                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6812                         "will try again later...\n", -rc);
6813                 /* reschedule for later */
6814                 fan_watchdog_reset();
6815         }
6816 }
6817
6818 /*
6819  * SYSFS fan layout: hwmon compatible (device)
6820  *
6821  * pwm*_enable:
6822  *      0: "disengaged" mode
6823  *      1: manual mode
6824  *      2: native EC "auto" mode (recommended, hardware default)
6825  *
6826  * pwm*: set speed in manual mode, ignored otherwise.
6827  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6828  *      interpolation.
6829  *
6830  * fan*_input: tachometer reading, RPM
6831  *
6832  *
6833  * SYSFS fan layout: extensions
6834  *
6835  * fan_watchdog (driver):
6836  *      fan watchdog interval in seconds, 0 disables (default), max 120
6837  */
6838
6839 /* sysfs fan pwm1_enable ----------------------------------------------- */
6840 static ssize_t fan_pwm1_enable_show(struct device *dev,
6841                                     struct device_attribute *attr,
6842                                     char *buf)
6843 {
6844         int res, mode;
6845         u8 status;
6846
6847         res = fan_get_status_safe(&status);
6848         if (res)
6849                 return res;
6850
6851         if (status & TP_EC_FAN_FULLSPEED) {
6852                 mode = 0;
6853         } else if (status & TP_EC_FAN_AUTO) {
6854                 mode = 2;
6855         } else
6856                 mode = 1;
6857
6858         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6859 }
6860
6861 static ssize_t fan_pwm1_enable_store(struct device *dev,
6862                                      struct device_attribute *attr,
6863                                      const char *buf, size_t count)
6864 {
6865         unsigned long t;
6866         int res, level;
6867
6868         if (parse_strtoul(buf, 2, &t))
6869                 return -EINVAL;
6870
6871         tpacpi_disclose_usertask("hwmon pwm1_enable",
6872                         "set fan mode to %lu\n", t);
6873
6874         switch (t) {
6875         case 0:
6876                 level = TP_EC_FAN_FULLSPEED;
6877                 break;
6878         case 1:
6879                 level = TPACPI_FAN_LAST_LEVEL;
6880                 break;
6881         case 2:
6882                 level = TP_EC_FAN_AUTO;
6883                 break;
6884         case 3:
6885                 /* reserved for software-controlled auto mode */
6886                 return -ENOSYS;
6887         default:
6888                 return -EINVAL;
6889         }
6890
6891         res = fan_set_level_safe(level);
6892         if (res == -ENXIO)
6893                 return -EINVAL;
6894         else if (res < 0)
6895                 return res;
6896
6897         fan_watchdog_reset();
6898
6899         return count;
6900 }
6901
6902 static struct device_attribute dev_attr_fan_pwm1_enable =
6903         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6904                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6905
6906 /* sysfs fan pwm1 ------------------------------------------------------ */
6907 static ssize_t fan_pwm1_show(struct device *dev,
6908                              struct device_attribute *attr,
6909                              char *buf)
6910 {
6911         int res;
6912         u8 status;
6913
6914         res = fan_get_status_safe(&status);
6915         if (res)
6916                 return res;
6917
6918         if ((status &
6919              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6920                 status = fan_control_desired_level;
6921
6922         if (status > 7)
6923                 status = 7;
6924
6925         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6926 }
6927
6928 static ssize_t fan_pwm1_store(struct device *dev,
6929                               struct device_attribute *attr,
6930                               const char *buf, size_t count)
6931 {
6932         unsigned long s;
6933         int rc;
6934         u8 status, newlevel;
6935
6936         if (parse_strtoul(buf, 255, &s))
6937                 return -EINVAL;
6938
6939         tpacpi_disclose_usertask("hwmon pwm1",
6940                         "set fan speed to %lu\n", s);
6941
6942         /* scale down from 0-255 to 0-7 */
6943         newlevel = (s >> 5) & 0x07;
6944
6945         if (mutex_lock_killable(&fan_mutex))
6946                 return -ERESTARTSYS;
6947
6948         rc = fan_get_status(&status);
6949         if (!rc && (status &
6950                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6951                 rc = fan_set_level(newlevel);
6952                 if (rc == -ENXIO)
6953                         rc = -EINVAL;
6954                 else if (!rc) {
6955                         fan_update_desired_level(newlevel);
6956                         fan_watchdog_reset();
6957                 }
6958         }
6959
6960         mutex_unlock(&fan_mutex);
6961         return (rc)? rc : count;
6962 }
6963
6964 static struct device_attribute dev_attr_fan_pwm1 =
6965         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6966                 fan_pwm1_show, fan_pwm1_store);
6967
6968 /* sysfs fan fan1_input ------------------------------------------------ */
6969 static ssize_t fan_fan1_input_show(struct device *dev,
6970                            struct device_attribute *attr,
6971                            char *buf)
6972 {
6973         int res;
6974         unsigned int speed;
6975
6976         res = fan_get_speed(&speed);
6977         if (res < 0)
6978                 return res;
6979
6980         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6981 }
6982
6983 static struct device_attribute dev_attr_fan_fan1_input =
6984         __ATTR(fan1_input, S_IRUGO,
6985                 fan_fan1_input_show, NULL);
6986
6987 /* sysfs fan fan2_input ------------------------------------------------ */
6988 static ssize_t fan_fan2_input_show(struct device *dev,
6989                            struct device_attribute *attr,
6990                            char *buf)
6991 {
6992         int res;
6993         unsigned int speed;
6994
6995         res = fan2_get_speed(&speed);
6996         if (res < 0)
6997                 return res;
6998
6999         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
7000 }
7001
7002 static struct device_attribute dev_attr_fan_fan2_input =
7003         __ATTR(fan2_input, S_IRUGO,
7004                 fan_fan2_input_show, NULL);
7005
7006 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
7007 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
7008                                      char *buf)
7009 {
7010         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
7011 }
7012
7013 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
7014                                       const char *buf, size_t count)
7015 {
7016         unsigned long t;
7017
7018         if (parse_strtoul(buf, 120, &t))
7019                 return -EINVAL;
7020
7021         if (!fan_control_allowed)
7022                 return -EPERM;
7023
7024         fan_watchdog_maxinterval = t;
7025         fan_watchdog_reset();
7026
7027         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
7028
7029         return count;
7030 }
7031
7032 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
7033                 fan_fan_watchdog_show, fan_fan_watchdog_store);
7034
7035 /* --------------------------------------------------------------------- */
7036 static struct attribute *fan_attributes[] = {
7037         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
7038         &dev_attr_fan_fan1_input.attr,
7039         NULL, /* for fan2_input */
7040         NULL
7041 };
7042
7043 static const struct attribute_group fan_attr_group = {
7044         .attrs = fan_attributes,
7045 };
7046
7047 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7048 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7049
7050 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7051         { .vendor = PCI_VENDOR_ID_IBM,          \
7052           .bios = TPACPI_MATCH_ANY,             \
7053           .ec = TPID(__id1, __id2),             \
7054           .quirks = __quirks }
7055
7056 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7057         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7058           .bios = TPACPI_MATCH_ANY,             \
7059           .ec = TPID(__id1, __id2),             \
7060           .quirks = __quirks }
7061
7062 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7063         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7064         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7065         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7066         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7067         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7068 };
7069
7070 #undef TPACPI_FAN_QL
7071 #undef TPACPI_FAN_QI
7072
7073 static int __init fan_init(struct ibm_init_struct *iibm)
7074 {
7075         int rc;
7076         unsigned long quirks;
7077
7078         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7079                         "initializing fan subdriver\n");
7080
7081         mutex_init(&fan_mutex);
7082         fan_status_access_mode = TPACPI_FAN_NONE;
7083         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7084         fan_control_commands = 0;
7085         fan_watchdog_maxinterval = 0;
7086         tp_features.fan_ctrl_status_undef = 0;
7087         tp_features.second_fan = 0;
7088         fan_control_desired_level = 7;
7089
7090         TPACPI_ACPIHANDLE_INIT(fans);
7091         TPACPI_ACPIHANDLE_INIT(gfan);
7092         TPACPI_ACPIHANDLE_INIT(sfan);
7093
7094         quirks = tpacpi_check_quirks(fan_quirk_table,
7095                                      ARRAY_SIZE(fan_quirk_table));
7096
7097         if (gfan_handle) {
7098                 /* 570, 600e/x, 770e, 770x */
7099                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7100         } else {
7101                 /* all other ThinkPads: note that even old-style
7102                  * ThinkPad ECs supports the fan control register */
7103                 if (likely(acpi_ec_read(fan_status_offset,
7104                                         &fan_control_initial_status))) {
7105                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7106                         if (quirks & TPACPI_FAN_Q1)
7107                                 fan_quirk1_setup();
7108                         if (quirks & TPACPI_FAN_2FAN) {
7109                                 tp_features.second_fan = 1;
7110                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7111                                         "secondary fan support enabled\n");
7112                         }
7113                 } else {
7114                         printk(TPACPI_ERR
7115                                "ThinkPad ACPI EC access misbehaving, "
7116                                "fan status and control unavailable\n");
7117                         return 1;
7118                 }
7119         }
7120
7121         if (sfan_handle) {
7122                 /* 570, 770x-JL */
7123                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7124                 fan_control_commands |=
7125                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7126         } else {
7127                 if (!gfan_handle) {
7128                         /* gfan without sfan means no fan control */
7129                         /* all other models implement TP EC 0x2f control */
7130
7131                         if (fans_handle) {
7132                                 /* X31, X40, X41 */
7133                                 fan_control_access_mode =
7134                                     TPACPI_FAN_WR_ACPI_FANS;
7135                                 fan_control_commands |=
7136                                     TPACPI_FAN_CMD_SPEED |
7137                                     TPACPI_FAN_CMD_LEVEL |
7138                                     TPACPI_FAN_CMD_ENABLE;
7139                         } else {
7140                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7141                                 fan_control_commands |=
7142                                     TPACPI_FAN_CMD_LEVEL |
7143                                     TPACPI_FAN_CMD_ENABLE;
7144                         }
7145                 }
7146         }
7147
7148         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7149                 "fan is %s, modes %d, %d\n",
7150                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7151                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7152                 fan_status_access_mode, fan_control_access_mode);
7153
7154         /* fan control master switch */
7155         if (!fan_control_allowed) {
7156                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7157                 fan_control_commands = 0;
7158                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7159                            "fan control features disabled by parameter\n");
7160         }
7161
7162         /* update fan_control_desired_level */
7163         if (fan_status_access_mode != TPACPI_FAN_NONE)
7164                 fan_get_status_safe(NULL);
7165
7166         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7167             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7168                 if (tp_features.second_fan) {
7169                         /* attach second fan tachometer */
7170                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7171                                         &dev_attr_fan_fan2_input.attr;
7172                 }
7173                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7174                                          &fan_attr_group);
7175                 if (rc < 0)
7176                         return rc;
7177
7178                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7179                                         &driver_attr_fan_watchdog);
7180                 if (rc < 0) {
7181                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7182                                         &fan_attr_group);
7183                         return rc;
7184                 }
7185                 return 0;
7186         } else
7187                 return 1;
7188 }
7189
7190 static void fan_exit(void)
7191 {
7192         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7193                     "cancelling any pending fan watchdog tasks\n");
7194
7195         /* FIXME: can we really do this unconditionally? */
7196         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7197         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7198                            &driver_attr_fan_watchdog);
7199
7200         cancel_delayed_work(&fan_watchdog_task);
7201         flush_workqueue(tpacpi_wq);
7202 }
7203
7204 static void fan_suspend(pm_message_t state)
7205 {
7206         int rc;
7207
7208         if (!fan_control_allowed)
7209                 return;
7210
7211         /* Store fan status in cache */
7212         fan_control_resume_level = 0;
7213         rc = fan_get_status_safe(&fan_control_resume_level);
7214         if (rc < 0)
7215                 printk(TPACPI_NOTICE
7216                         "failed to read fan level for later "
7217                         "restore during resume: %d\n", rc);
7218
7219         /* if it is undefined, don't attempt to restore it.
7220          * KEEP THIS LAST */
7221         if (tp_features.fan_ctrl_status_undef)
7222                 fan_control_resume_level = 0;
7223 }
7224
7225 static void fan_resume(void)
7226 {
7227         u8 current_level = 7;
7228         bool do_set = false;
7229         int rc;
7230
7231         /* DSDT *always* updates status on resume */
7232         tp_features.fan_ctrl_status_undef = 0;
7233
7234         if (!fan_control_allowed ||
7235             !fan_control_resume_level ||
7236             (fan_get_status_safe(&current_level) < 0))
7237                 return;
7238
7239         switch (fan_control_access_mode) {
7240         case TPACPI_FAN_WR_ACPI_SFAN:
7241                 /* never decrease fan level */
7242                 do_set = (fan_control_resume_level > current_level);
7243                 break;
7244         case TPACPI_FAN_WR_ACPI_FANS:
7245         case TPACPI_FAN_WR_TPEC:
7246                 /* never decrease fan level, scale is:
7247                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7248                  *
7249                  * We expect the firmware to set either 7 or AUTO, but we
7250                  * handle FULLSPEED out of paranoia.
7251                  *
7252                  * So, we can safely only restore FULLSPEED or 7, anything
7253                  * else could slow the fan.  Restoring AUTO is useless, at
7254                  * best that's exactly what the DSDT already set (it is the
7255                  * slower it uses).
7256                  *
7257                  * Always keep in mind that the DSDT *will* have set the
7258                  * fans to what the vendor supposes is the best level.  We
7259                  * muck with it only to speed the fan up.
7260                  */
7261                 if (fan_control_resume_level != 7 &&
7262                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7263                         return;
7264                 else
7265                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7266                                  (current_level != fan_control_resume_level);
7267                 break;
7268         default:
7269                 return;
7270         }
7271         if (do_set) {
7272                 printk(TPACPI_NOTICE
7273                         "restoring fan level to 0x%02x\n",
7274                         fan_control_resume_level);
7275                 rc = fan_set_level_safe(fan_control_resume_level);
7276                 if (rc < 0)
7277                         printk(TPACPI_NOTICE
7278                                 "failed to restore fan level: %d\n", rc);
7279         }
7280 }
7281
7282 static int fan_read(char *p)
7283 {
7284         int len = 0;
7285         int rc;
7286         u8 status;
7287         unsigned int speed = 0;
7288
7289         switch (fan_status_access_mode) {
7290         case TPACPI_FAN_RD_ACPI_GFAN:
7291                 /* 570, 600e/x, 770e, 770x */
7292                 rc = fan_get_status_safe(&status);
7293                 if (rc < 0)
7294                         return rc;
7295
7296                 len += sprintf(p + len, "status:\t\t%s\n"
7297                                "level:\t\t%d\n",
7298                                (status != 0) ? "enabled" : "disabled", status);
7299                 break;
7300
7301         case TPACPI_FAN_RD_TPEC:
7302                 /* all except 570, 600e/x, 770e, 770x */
7303                 rc = fan_get_status_safe(&status);
7304                 if (rc < 0)
7305                         return rc;
7306
7307                 len += sprintf(p + len, "status:\t\t%s\n",
7308                                (status != 0) ? "enabled" : "disabled");
7309
7310                 rc = fan_get_speed(&speed);
7311                 if (rc < 0)
7312                         return rc;
7313
7314                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7315
7316                 if (status & TP_EC_FAN_FULLSPEED)
7317                         /* Disengaged mode takes precedence */
7318                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7319                 else if (status & TP_EC_FAN_AUTO)
7320                         len += sprintf(p + len, "level:\t\tauto\n");
7321                 else
7322                         len += sprintf(p + len, "level:\t\t%d\n", status);
7323                 break;
7324
7325         case TPACPI_FAN_NONE:
7326         default:
7327                 len += sprintf(p + len, "status:\t\tnot supported\n");
7328         }
7329
7330         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7331                 len += sprintf(p + len, "commands:\tlevel <level>");
7332
7333                 switch (fan_control_access_mode) {
7334                 case TPACPI_FAN_WR_ACPI_SFAN:
7335                         len += sprintf(p + len, " (<level> is 0-7)\n");
7336                         break;
7337
7338                 default:
7339                         len += sprintf(p + len, " (<level> is 0-7, "
7340                                        "auto, disengaged, full-speed)\n");
7341                         break;
7342                 }
7343         }
7344
7345         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7346                 len += sprintf(p + len, "commands:\tenable, disable\n"
7347                                "commands:\twatchdog <timeout> (<timeout> "
7348                                "is 0 (off), 1-120 (seconds))\n");
7349
7350         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7351                 len += sprintf(p + len, "commands:\tspeed <speed>"
7352                                " (<speed> is 0-65535)\n");
7353
7354         return len;
7355 }
7356
7357 static int fan_write_cmd_level(const char *cmd, int *rc)
7358 {
7359         int level;
7360
7361         if (strlencmp(cmd, "level auto") == 0)
7362                 level = TP_EC_FAN_AUTO;
7363         else if ((strlencmp(cmd, "level disengaged") == 0) |
7364                         (strlencmp(cmd, "level full-speed") == 0))
7365                 level = TP_EC_FAN_FULLSPEED;
7366         else if (sscanf(cmd, "level %d", &level) != 1)
7367                 return 0;
7368
7369         *rc = fan_set_level_safe(level);
7370         if (*rc == -ENXIO)
7371                 printk(TPACPI_ERR "level command accepted for unsupported "
7372                        "access mode %d", fan_control_access_mode);
7373         else if (!*rc)
7374                 tpacpi_disclose_usertask("procfs fan",
7375                         "set level to %d\n", level);
7376
7377         return 1;
7378 }
7379
7380 static int fan_write_cmd_enable(const char *cmd, int *rc)
7381 {
7382         if (strlencmp(cmd, "enable") != 0)
7383                 return 0;
7384
7385         *rc = fan_set_enable();
7386         if (*rc == -ENXIO)
7387                 printk(TPACPI_ERR "enable command accepted for unsupported "
7388                        "access mode %d", fan_control_access_mode);
7389         else if (!*rc)
7390                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7391
7392         return 1;
7393 }
7394
7395 static int fan_write_cmd_disable(const char *cmd, int *rc)
7396 {
7397         if (strlencmp(cmd, "disable") != 0)
7398                 return 0;
7399
7400         *rc = fan_set_disable();
7401         if (*rc == -ENXIO)
7402                 printk(TPACPI_ERR "disable command accepted for unsupported "
7403                        "access mode %d", fan_control_access_mode);
7404         else if (!*rc)
7405                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7406
7407         return 1;
7408 }
7409
7410 static int fan_write_cmd_speed(const char *cmd, int *rc)
7411 {
7412         int speed;
7413
7414         /* TODO:
7415          * Support speed <low> <medium> <high> ? */
7416
7417         if (sscanf(cmd, "speed %d", &speed) != 1)
7418                 return 0;
7419
7420         *rc = fan_set_speed(speed);
7421         if (*rc == -ENXIO)
7422                 printk(TPACPI_ERR "speed command accepted for unsupported "
7423                        "access mode %d", fan_control_access_mode);
7424         else if (!*rc)
7425                 tpacpi_disclose_usertask("procfs fan",
7426                         "set speed to %d\n", speed);
7427
7428         return 1;
7429 }
7430
7431 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7432 {
7433         int interval;
7434
7435         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7436                 return 0;
7437
7438         if (interval < 0 || interval > 120)
7439                 *rc = -EINVAL;
7440         else {
7441                 fan_watchdog_maxinterval = interval;
7442                 tpacpi_disclose_usertask("procfs fan",
7443                         "set watchdog timer to %d\n",
7444                         interval);
7445         }
7446
7447         return 1;
7448 }
7449
7450 static int fan_write(char *buf)
7451 {
7452         char *cmd;
7453         int rc = 0;
7454
7455         while (!rc && (cmd = next_cmd(&buf))) {
7456                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7457                       fan_write_cmd_level(cmd, &rc)) &&
7458                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7459                       (fan_write_cmd_enable(cmd, &rc) ||
7460                        fan_write_cmd_disable(cmd, &rc) ||
7461                        fan_write_cmd_watchdog(cmd, &rc))) &&
7462                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7463                       fan_write_cmd_speed(cmd, &rc))
7464                     )
7465                         rc = -EINVAL;
7466                 else if (!rc)
7467                         fan_watchdog_reset();
7468         }
7469
7470         return rc;
7471 }
7472
7473 static struct ibm_struct fan_driver_data = {
7474         .name = "fan",
7475         .read = fan_read,
7476         .write = fan_write,
7477         .exit = fan_exit,
7478         .suspend = fan_suspend,
7479         .resume = fan_resume,
7480 };
7481
7482 /****************************************************************************
7483  ****************************************************************************
7484  *
7485  * Infrastructure
7486  *
7487  ****************************************************************************
7488  ****************************************************************************/
7489
7490 /* sysfs name ---------------------------------------------------------- */
7491 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7492                            struct device_attribute *attr,
7493                            char *buf)
7494 {
7495         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7496 }
7497
7498 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7499         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7500
7501 /* --------------------------------------------------------------------- */
7502
7503 /* /proc support */
7504 static struct proc_dir_entry *proc_dir;
7505
7506 /*
7507  * Module and infrastructure proble, init and exit handling
7508  */
7509
7510 static int force_load;
7511
7512 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7513 static const char * __init str_supported(int is_supported)
7514 {
7515         static char text_unsupported[] __initdata = "not supported";
7516
7517         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7518 }
7519 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7520
7521 static void ibm_exit(struct ibm_struct *ibm)
7522 {
7523         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7524
7525         list_del_init(&ibm->all_drivers);
7526
7527         if (ibm->flags.acpi_notify_installed) {
7528                 dbg_printk(TPACPI_DBG_EXIT,
7529                         "%s: acpi_remove_notify_handler\n", ibm->name);
7530                 BUG_ON(!ibm->acpi);
7531                 acpi_remove_notify_handler(*ibm->acpi->handle,
7532                                            ibm->acpi->type,
7533                                            dispatch_acpi_notify);
7534                 ibm->flags.acpi_notify_installed = 0;
7535                 ibm->flags.acpi_notify_installed = 0;
7536         }
7537
7538         if (ibm->flags.proc_created) {
7539                 dbg_printk(TPACPI_DBG_EXIT,
7540                         "%s: remove_proc_entry\n", ibm->name);
7541                 remove_proc_entry(ibm->name, proc_dir);
7542                 ibm->flags.proc_created = 0;
7543         }
7544
7545         if (ibm->flags.acpi_driver_registered) {
7546                 dbg_printk(TPACPI_DBG_EXIT,
7547                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7548                 BUG_ON(!ibm->acpi);
7549                 acpi_bus_unregister_driver(ibm->acpi->driver);
7550                 kfree(ibm->acpi->driver);
7551                 ibm->acpi->driver = NULL;
7552                 ibm->flags.acpi_driver_registered = 0;
7553         }
7554
7555         if (ibm->flags.init_called && ibm->exit) {
7556                 ibm->exit();
7557                 ibm->flags.init_called = 0;
7558         }
7559
7560         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7561 }
7562
7563 static int __init ibm_init(struct ibm_init_struct *iibm)
7564 {
7565         int ret;
7566         struct ibm_struct *ibm = iibm->data;
7567         struct proc_dir_entry *entry;
7568
7569         BUG_ON(ibm == NULL);
7570
7571         INIT_LIST_HEAD(&ibm->all_drivers);
7572
7573         if (ibm->flags.experimental && !experimental)
7574                 return 0;
7575
7576         dbg_printk(TPACPI_DBG_INIT,
7577                 "probing for %s\n", ibm->name);
7578
7579         if (iibm->init) {
7580                 ret = iibm->init(iibm);
7581                 if (ret > 0)
7582                         return 0;       /* probe failed */
7583                 if (ret)
7584                         return ret;
7585
7586                 ibm->flags.init_called = 1;
7587         }
7588
7589         if (ibm->acpi) {
7590                 if (ibm->acpi->hid) {
7591                         ret = register_tpacpi_subdriver(ibm);
7592                         if (ret)
7593                                 goto err_out;
7594                 }
7595
7596                 if (ibm->acpi->notify) {
7597                         ret = setup_acpi_notify(ibm);
7598                         if (ret == -ENODEV) {
7599                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7600                                         ibm->name);
7601                                 ret = 0;
7602                                 goto err_out;
7603                         }
7604                         if (ret < 0)
7605                                 goto err_out;
7606                 }
7607         }
7608
7609         dbg_printk(TPACPI_DBG_INIT,
7610                 "%s installed\n", ibm->name);
7611
7612         if (ibm->read) {
7613                 entry = create_proc_entry(ibm->name,
7614                                           S_IFREG | S_IRUGO | S_IWUSR,
7615                                           proc_dir);
7616                 if (!entry) {
7617                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7618                                ibm->name);
7619                         ret = -ENODEV;
7620                         goto err_out;
7621                 }
7622                 entry->data = ibm;
7623                 entry->read_proc = &dispatch_procfs_read;
7624                 if (ibm->write)
7625                         entry->write_proc = &dispatch_procfs_write;
7626                 ibm->flags.proc_created = 1;
7627         }
7628
7629         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7630
7631         return 0;
7632
7633 err_out:
7634         dbg_printk(TPACPI_DBG_INIT,
7635                 "%s: at error exit path with result %d\n",
7636                 ibm->name, ret);
7637
7638         ibm_exit(ibm);
7639         return (ret < 0)? ret : 0;
7640 }
7641
7642 /* Probing */
7643
7644 static bool __pure __init tpacpi_is_fw_digit(const char c)
7645 {
7646         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7647 }
7648
7649 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7650 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7651                                                 const char t)
7652 {
7653         return s && strlen(s) >= 8 &&
7654                 tpacpi_is_fw_digit(s[0]) &&
7655                 tpacpi_is_fw_digit(s[1]) &&
7656                 s[2] == t && s[3] == 'T' &&
7657                 tpacpi_is_fw_digit(s[4]) &&
7658                 tpacpi_is_fw_digit(s[5]) &&
7659                 s[6] == 'W' && s[7] == 'W';
7660 }
7661
7662 /* returns 0 - probe ok, or < 0 - probe error.
7663  * Probe ok doesn't mean thinkpad found.
7664  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7665 static int __must_check __init get_thinkpad_model_data(
7666                                                 struct thinkpad_id_data *tp)
7667 {
7668         const struct dmi_device *dev = NULL;
7669         char ec_fw_string[18];
7670         char const *s;
7671
7672         if (!tp)
7673                 return -EINVAL;
7674
7675         memset(tp, 0, sizeof(*tp));
7676
7677         if (dmi_name_in_vendors("IBM"))
7678                 tp->vendor = PCI_VENDOR_ID_IBM;
7679         else if (dmi_name_in_vendors("LENOVO"))
7680                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7681         else
7682                 return 0;
7683
7684         s = dmi_get_system_info(DMI_BIOS_VERSION);
7685         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7686         if (s && !tp->bios_version_str)
7687                 return -ENOMEM;
7688
7689         /* Really ancient ThinkPad 240X will fail this, which is fine */
7690         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7691                 return 0;
7692
7693         tp->bios_model = tp->bios_version_str[0]
7694                          | (tp->bios_version_str[1] << 8);
7695         tp->bios_release = (tp->bios_version_str[4] << 8)
7696                          | tp->bios_version_str[5];
7697
7698         /*
7699          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7700          * X32 or newer, all Z series;  Some models must have an
7701          * up-to-date BIOS or they will not be detected.
7702          *
7703          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7704          */
7705         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7706                 if (sscanf(dev->name,
7707                            "IBM ThinkPad Embedded Controller -[%17c",
7708                            ec_fw_string) == 1) {
7709                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7710                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7711
7712                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7713                         if (!tp->ec_version_str)
7714                                 return -ENOMEM;
7715
7716                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7717                                 tp->ec_model = ec_fw_string[0]
7718                                                 | (ec_fw_string[1] << 8);
7719                                 tp->ec_release = (ec_fw_string[4] << 8)
7720                                                 | ec_fw_string[5];
7721                         } else {
7722                                 printk(TPACPI_NOTICE
7723                                         "ThinkPad firmware release %s "
7724                                         "doesn't match the known patterns\n",
7725                                         ec_fw_string);
7726                                 printk(TPACPI_NOTICE
7727                                         "please report this to %s\n",
7728                                         TPACPI_MAIL);
7729                         }
7730                         break;
7731                 }
7732         }
7733
7734         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7735         if (s && !strnicmp(s, "ThinkPad", 8)) {
7736                 tp->model_str = kstrdup(s, GFP_KERNEL);
7737                 if (!tp->model_str)
7738                         return -ENOMEM;
7739         }
7740
7741         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7742         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7743         if (s && !tp->nummodel_str)
7744                 return -ENOMEM;
7745
7746         return 0;
7747 }
7748
7749 static int __init probe_for_thinkpad(void)
7750 {
7751         int is_thinkpad;
7752
7753         if (acpi_disabled)
7754                 return -ENODEV;
7755
7756         /*
7757          * Non-ancient models have better DMI tagging, but very old models
7758          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
7759          */
7760         is_thinkpad = (thinkpad_id.model_str != NULL) ||
7761                       (thinkpad_id.ec_model != 0) ||
7762                       tpacpi_is_fw_known();
7763
7764         /* ec is required because many other handles are relative to it */
7765         TPACPI_ACPIHANDLE_INIT(ec);
7766         if (!ec_handle) {
7767                 if (is_thinkpad)
7768                         printk(TPACPI_ERR
7769                                 "Not yet supported ThinkPad detected!\n");
7770                 return -ENODEV;
7771         }
7772
7773         if (!is_thinkpad && !force_load)
7774                 return -ENODEV;
7775
7776         return 0;
7777 }
7778
7779
7780 /* Module init, exit, parameters */
7781
7782 static struct ibm_init_struct ibms_init[] __initdata = {
7783         {
7784                 .init = thinkpad_acpi_driver_init,
7785                 .data = &thinkpad_acpi_driver_data,
7786         },
7787         {
7788                 .init = hotkey_init,
7789                 .data = &hotkey_driver_data,
7790         },
7791         {
7792                 .init = bluetooth_init,
7793                 .data = &bluetooth_driver_data,
7794         },
7795         {
7796                 .init = wan_init,
7797                 .data = &wan_driver_data,
7798         },
7799         {
7800                 .init = uwb_init,
7801                 .data = &uwb_driver_data,
7802         },
7803 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7804         {
7805                 .init = video_init,
7806                 .data = &video_driver_data,
7807         },
7808 #endif
7809         {
7810                 .init = light_init,
7811                 .data = &light_driver_data,
7812         },
7813         {
7814                 .init = cmos_init,
7815                 .data = &cmos_driver_data,
7816         },
7817         {
7818                 .init = led_init,
7819                 .data = &led_driver_data,
7820         },
7821         {
7822                 .init = beep_init,
7823                 .data = &beep_driver_data,
7824         },
7825         {
7826                 .init = thermal_init,
7827                 .data = &thermal_driver_data,
7828         },
7829         {
7830                 .data = &ecdump_driver_data,
7831         },
7832         {
7833                 .init = brightness_init,
7834                 .data = &brightness_driver_data,
7835         },
7836         {
7837                 .data = &volume_driver_data,
7838         },
7839         {
7840                 .init = fan_init,
7841                 .data = &fan_driver_data,
7842         },
7843 };
7844
7845 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7846 {
7847         unsigned int i;
7848         struct ibm_struct *ibm;
7849
7850         if (!kp || !kp->name || !val)
7851                 return -EINVAL;
7852
7853         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7854                 ibm = ibms_init[i].data;
7855                 WARN_ON(ibm == NULL);
7856
7857                 if (!ibm || !ibm->name)
7858                         continue;
7859
7860                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7861                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7862                                 return -ENOSPC;
7863                         strcpy(ibms_init[i].param, val);
7864                         strcat(ibms_init[i].param, ",");
7865                         return 0;
7866                 }
7867         }
7868
7869         return -EINVAL;
7870 }
7871
7872 module_param(experimental, int, 0);
7873 MODULE_PARM_DESC(experimental,
7874                  "Enables experimental features when non-zero");
7875
7876 module_param_named(debug, dbg_level, uint, 0);
7877 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7878
7879 module_param(force_load, bool, 0);
7880 MODULE_PARM_DESC(force_load,
7881                  "Attempts to load the driver even on a "
7882                  "mis-identified ThinkPad when true");
7883
7884 module_param_named(fan_control, fan_control_allowed, bool, 0);
7885 MODULE_PARM_DESC(fan_control,
7886                  "Enables setting fan parameters features when true");
7887
7888 module_param_named(brightness_mode, brightness_mode, uint, 0);
7889 MODULE_PARM_DESC(brightness_mode,
7890                  "Selects brightness control strategy: "
7891                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7892
7893 module_param(brightness_enable, uint, 0);
7894 MODULE_PARM_DESC(brightness_enable,
7895                  "Enables backlight control when 1, disables when 0");
7896
7897 module_param(hotkey_report_mode, uint, 0);
7898 MODULE_PARM_DESC(hotkey_report_mode,
7899                  "used for backwards compatibility with userspace, "
7900                  "see documentation");
7901
7902 #define TPACPI_PARAM(feature) \
7903         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7904         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7905                          "at module load, see documentation")
7906
7907 TPACPI_PARAM(hotkey);
7908 TPACPI_PARAM(bluetooth);
7909 TPACPI_PARAM(video);
7910 TPACPI_PARAM(light);
7911 TPACPI_PARAM(cmos);
7912 TPACPI_PARAM(led);
7913 TPACPI_PARAM(beep);
7914 TPACPI_PARAM(ecdump);
7915 TPACPI_PARAM(brightness);
7916 TPACPI_PARAM(volume);
7917 TPACPI_PARAM(fan);
7918
7919 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7920 module_param(dbg_wlswemul, uint, 0);
7921 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7922 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7923 MODULE_PARM_DESC(wlsw_state,
7924                  "Initial state of the emulated WLSW switch");
7925
7926 module_param(dbg_bluetoothemul, uint, 0);
7927 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7928 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7929 MODULE_PARM_DESC(bluetooth_state,
7930                  "Initial state of the emulated bluetooth switch");
7931
7932 module_param(dbg_wwanemul, uint, 0);
7933 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7934 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7935 MODULE_PARM_DESC(wwan_state,
7936                  "Initial state of the emulated WWAN switch");
7937
7938 module_param(dbg_uwbemul, uint, 0);
7939 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7940 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7941 MODULE_PARM_DESC(uwb_state,
7942                  "Initial state of the emulated UWB switch");
7943 #endif
7944
7945 static void thinkpad_acpi_module_exit(void)
7946 {
7947         struct ibm_struct *ibm, *itmp;
7948
7949         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7950
7951         list_for_each_entry_safe_reverse(ibm, itmp,
7952                                          &tpacpi_all_drivers,
7953                                          all_drivers) {
7954                 ibm_exit(ibm);
7955         }
7956
7957         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7958
7959         if (tpacpi_inputdev) {
7960                 if (tp_features.input_device_registered)
7961                         input_unregister_device(tpacpi_inputdev);
7962                 else
7963                         input_free_device(tpacpi_inputdev);
7964         }
7965
7966         if (tpacpi_hwmon)
7967                 hwmon_device_unregister(tpacpi_hwmon);
7968
7969         if (tp_features.sensors_pdev_attrs_registered)
7970                 device_remove_file(&tpacpi_sensors_pdev->dev,
7971                                    &dev_attr_thinkpad_acpi_pdev_name);
7972         if (tpacpi_sensors_pdev)
7973                 platform_device_unregister(tpacpi_sensors_pdev);
7974         if (tpacpi_pdev)
7975                 platform_device_unregister(tpacpi_pdev);
7976
7977         if (tp_features.sensors_pdrv_attrs_registered)
7978                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7979         if (tp_features.platform_drv_attrs_registered)
7980                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7981
7982         if (tp_features.sensors_pdrv_registered)
7983                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7984
7985         if (tp_features.platform_drv_registered)
7986                 platform_driver_unregister(&tpacpi_pdriver);
7987
7988         if (proc_dir)
7989                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7990
7991         if (tpacpi_wq)
7992                 destroy_workqueue(tpacpi_wq);
7993
7994         kfree(thinkpad_id.bios_version_str);
7995         kfree(thinkpad_id.ec_version_str);
7996         kfree(thinkpad_id.model_str);
7997 }
7998
7999
8000 static int __init thinkpad_acpi_module_init(void)
8001 {
8002         int ret, i;
8003
8004         tpacpi_lifecycle = TPACPI_LIFE_INIT;
8005
8006         /* Parameter checking */
8007         if (hotkey_report_mode > 2)
8008                 return -EINVAL;
8009
8010         /* Driver-level probe */
8011
8012         ret = get_thinkpad_model_data(&thinkpad_id);
8013         if (ret) {
8014                 printk(TPACPI_ERR
8015                         "unable to get DMI data: %d\n", ret);
8016                 thinkpad_acpi_module_exit();
8017                 return ret;
8018         }
8019         ret = probe_for_thinkpad();
8020         if (ret) {
8021                 thinkpad_acpi_module_exit();
8022                 return ret;
8023         }
8024
8025         /* Driver initialization */
8026
8027         TPACPI_ACPIHANDLE_INIT(ecrd);
8028         TPACPI_ACPIHANDLE_INIT(ecwr);
8029
8030         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
8031         if (!tpacpi_wq) {
8032                 thinkpad_acpi_module_exit();
8033                 return -ENOMEM;
8034         }
8035
8036         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
8037         if (!proc_dir) {
8038                 printk(TPACPI_ERR
8039                        "unable to create proc dir " TPACPI_PROC_DIR);
8040                 thinkpad_acpi_module_exit();
8041                 return -ENODEV;
8042         }
8043
8044         ret = platform_driver_register(&tpacpi_pdriver);
8045         if (ret) {
8046                 printk(TPACPI_ERR
8047                        "unable to register main platform driver\n");
8048                 thinkpad_acpi_module_exit();
8049                 return ret;
8050         }
8051         tp_features.platform_drv_registered = 1;
8052
8053         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8054         if (ret) {
8055                 printk(TPACPI_ERR
8056                        "unable to register hwmon platform driver\n");
8057                 thinkpad_acpi_module_exit();
8058                 return ret;
8059         }
8060         tp_features.sensors_pdrv_registered = 1;
8061
8062         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8063         if (!ret) {
8064                 tp_features.platform_drv_attrs_registered = 1;
8065                 ret = tpacpi_create_driver_attributes(
8066                                         &tpacpi_hwmon_pdriver.driver);
8067         }
8068         if (ret) {
8069                 printk(TPACPI_ERR
8070                        "unable to create sysfs driver attributes\n");
8071                 thinkpad_acpi_module_exit();
8072                 return ret;
8073         }
8074         tp_features.sensors_pdrv_attrs_registered = 1;
8075
8076
8077         /* Device initialization */
8078         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8079                                                         NULL, 0);
8080         if (IS_ERR(tpacpi_pdev)) {
8081                 ret = PTR_ERR(tpacpi_pdev);
8082                 tpacpi_pdev = NULL;
8083                 printk(TPACPI_ERR "unable to register platform device\n");
8084                 thinkpad_acpi_module_exit();
8085                 return ret;
8086         }
8087         tpacpi_sensors_pdev = platform_device_register_simple(
8088                                                 TPACPI_HWMON_DRVR_NAME,
8089                                                 -1, NULL, 0);
8090         if (IS_ERR(tpacpi_sensors_pdev)) {
8091                 ret = PTR_ERR(tpacpi_sensors_pdev);
8092                 tpacpi_sensors_pdev = NULL;
8093                 printk(TPACPI_ERR
8094                        "unable to register hwmon platform device\n");
8095                 thinkpad_acpi_module_exit();
8096                 return ret;
8097         }
8098         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8099                                  &dev_attr_thinkpad_acpi_pdev_name);
8100         if (ret) {
8101                 printk(TPACPI_ERR
8102                        "unable to create sysfs hwmon device attributes\n");
8103                 thinkpad_acpi_module_exit();
8104                 return ret;
8105         }
8106         tp_features.sensors_pdev_attrs_registered = 1;
8107         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8108         if (IS_ERR(tpacpi_hwmon)) {
8109                 ret = PTR_ERR(tpacpi_hwmon);
8110                 tpacpi_hwmon = NULL;
8111                 printk(TPACPI_ERR "unable to register hwmon device\n");
8112                 thinkpad_acpi_module_exit();
8113                 return ret;
8114         }
8115         mutex_init(&tpacpi_inputdev_send_mutex);
8116         tpacpi_inputdev = input_allocate_device();
8117         if (!tpacpi_inputdev) {
8118                 printk(TPACPI_ERR "unable to allocate input device\n");
8119                 thinkpad_acpi_module_exit();
8120                 return -ENOMEM;
8121         } else {
8122                 /* Prepare input device, but don't register */
8123                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8124                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8125                 tpacpi_inputdev->id.bustype = BUS_HOST;
8126                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8127                                                 thinkpad_id.vendor :
8128                                                 PCI_VENDOR_ID_IBM;
8129                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8130                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8131         }
8132         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8133                 ret = ibm_init(&ibms_init[i]);
8134                 if (ret >= 0 && *ibms_init[i].param)
8135                         ret = ibms_init[i].data->write(ibms_init[i].param);
8136                 if (ret < 0) {
8137                         thinkpad_acpi_module_exit();
8138                         return ret;
8139                 }
8140         }
8141         ret = input_register_device(tpacpi_inputdev);
8142         if (ret < 0) {
8143                 printk(TPACPI_ERR "unable to register input device\n");
8144                 thinkpad_acpi_module_exit();
8145                 return ret;
8146         } else {
8147                 tp_features.input_device_registered = 1;
8148         }
8149
8150         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8151         return 0;
8152 }
8153
8154 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8155
8156 /*
8157  * This will autoload the driver in almost every ThinkPad
8158  * in widespread use.
8159  *
8160  * Only _VERY_ old models, like the 240, 240x and 570 lack
8161  * the HKEY event interface.
8162  */
8163 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8164
8165 /*
8166  * DMI matching for module autoloading
8167  *
8168  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8169  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8170  *
8171  * Only models listed in thinkwiki will be supported, so add yours
8172  * if it is not there yet.
8173  */
8174 #define IBM_BIOS_MODULE_ALIAS(__type) \
8175         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8176
8177 /* Ancient thinkpad BIOSes have to be identified by
8178  * BIOS type or model number, and there are far less
8179  * BIOS types than model numbers... */
8180 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8181
8182 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8183 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8184 MODULE_DESCRIPTION(TPACPI_DESC);
8185 MODULE_VERSION(TPACPI_VERSION);
8186 MODULE_LICENSE("GPL");
8187
8188 module_init(thinkpad_acpi_module_init);
8189 module_exit(thinkpad_acpi_module_exit);