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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 static struct task_struct *tpacpi_hotkey_task;
1926 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1927 static int hotkey_poll_freq = 10;       /* Hz */
1928 static struct mutex hotkey_thread_mutex;
1929 static struct mutex hotkey_thread_data_mutex;
1930 static unsigned int hotkey_config_change;
1931
1932 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1933
1934 #define hotkey_source_mask 0U
1935
1936 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1937
1938 static struct mutex hotkey_mutex;
1939
1940 static enum {   /* Reasons for waking up */
1941         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1942         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1943         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1944 } hotkey_wakeup_reason;
1945
1946 static int hotkey_autosleep_ack;
1947
1948 static u32 hotkey_orig_mask;
1949 static u32 hotkey_all_mask;
1950 static u32 hotkey_reserved_mask;
1951 static u32 hotkey_mask;
1952
1953 static unsigned int hotkey_report_mode;
1954
1955 static u16 *hotkey_keycode_map;
1956
1957 static struct attribute_set *hotkey_dev_attributes;
1958
1959 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1960 #define HOTKEY_CONFIG_CRITICAL_START \
1961         do { \
1962                 mutex_lock(&hotkey_thread_data_mutex); \
1963                 hotkey_config_change++; \
1964         } while (0);
1965 #define HOTKEY_CONFIG_CRITICAL_END \
1966         mutex_unlock(&hotkey_thread_data_mutex);
1967 #else
1968 #define HOTKEY_CONFIG_CRITICAL_START
1969 #define HOTKEY_CONFIG_CRITICAL_END
1970 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1971
1972 /* HKEY.MHKG() return bits */
1973 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1974
1975 static int hotkey_get_wlsw(void)
1976 {
1977         int status;
1978
1979         if (!tp_features.hotkey_wlsw)
1980                 return -ENODEV;
1981
1982 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1983         if (dbg_wlswemul)
1984                 return (tpacpi_wlsw_emulstate) ?
1985                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1986 #endif
1987
1988         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1989                 return -EIO;
1990
1991         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1992 }
1993
1994 static int hotkey_get_tablet_mode(int *status)
1995 {
1996         int s;
1997
1998         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1999                 return -EIO;
2000
2001         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2002         return 0;
2003 }
2004
2005 /*
2006  * Call with hotkey_mutex held
2007  */
2008 static int hotkey_mask_get(void)
2009 {
2010         u32 m = 0;
2011
2012         if (tp_features.hotkey_mask) {
2013                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2014                         return -EIO;
2015         }
2016         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
2017
2018         return 0;
2019 }
2020
2021 /*
2022  * Call with hotkey_mutex held
2023  */
2024 static int hotkey_mask_set(u32 mask)
2025 {
2026         int i;
2027         int rc = 0;
2028
2029         if (tp_features.hotkey_mask) {
2030                 if (!tp_warned.hotkey_mask_ff &&
2031                     (mask == 0xffff || mask == 0xffffff ||
2032                      mask == 0xffffffff)) {
2033                         tp_warned.hotkey_mask_ff = 1;
2034                         printk(TPACPI_NOTICE
2035                                "setting the hotkey mask to 0x%08x is likely "
2036                                "not the best way to go about it\n", mask);
2037                         printk(TPACPI_NOTICE
2038                                "please consider using the driver defaults, "
2039                                "and refer to up-to-date thinkpad-acpi "
2040                                "documentation\n");
2041                 }
2042
2043                 HOTKEY_CONFIG_CRITICAL_START
2044                 for (i = 0; i < 32; i++) {
2045                         u32 m = 1 << i;
2046                         /* enable in firmware mask only keys not in NVRAM
2047                          * mode, but enable the key in the cached hotkey_mask
2048                          * regardless of mode, or the key will end up
2049                          * disabled by hotkey_mask_get() */
2050                         if (!acpi_evalf(hkey_handle,
2051                                         NULL, "MHKM", "vdd", i + 1,
2052                                         !!((mask & ~hotkey_source_mask) & m))) {
2053                                 rc = -EIO;
2054                                 break;
2055                         } else {
2056                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
2057                         }
2058                 }
2059                 HOTKEY_CONFIG_CRITICAL_END
2060
2061                 /* hotkey_mask_get must be called unconditionally below */
2062                 if (!hotkey_mask_get() && !rc &&
2063                     (hotkey_mask & ~hotkey_source_mask) !=
2064                      (mask & ~hotkey_source_mask)) {
2065                         printk(TPACPI_NOTICE
2066                                "requested hot key mask 0x%08x, but "
2067                                "firmware forced it to 0x%08x\n",
2068                                mask, hotkey_mask);
2069                 }
2070         } else {
2071 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2072                 HOTKEY_CONFIG_CRITICAL_START
2073                 hotkey_mask = mask & hotkey_source_mask;
2074                 HOTKEY_CONFIG_CRITICAL_END
2075                 hotkey_mask_get();
2076                 if (hotkey_mask != mask) {
2077                         printk(TPACPI_NOTICE
2078                                "requested hot key mask 0x%08x, "
2079                                "forced to 0x%08x (NVRAM poll mask is "
2080                                "0x%08x): no firmware mask support\n",
2081                                mask, hotkey_mask, hotkey_source_mask);
2082                 }
2083 #else
2084                 hotkey_mask_get();
2085                 rc = -ENXIO;
2086 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2087         }
2088
2089         return rc;
2090 }
2091
2092 static int hotkey_status_get(int *status)
2093 {
2094         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2095                 return -EIO;
2096
2097         return 0;
2098 }
2099
2100 static int hotkey_status_set(bool enable)
2101 {
2102         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2103                 return -EIO;
2104
2105         return 0;
2106 }
2107
2108 static void tpacpi_input_send_tabletsw(void)
2109 {
2110         int state;
2111
2112         if (tp_features.hotkey_tablet &&
2113             !hotkey_get_tablet_mode(&state)) {
2114                 mutex_lock(&tpacpi_inputdev_send_mutex);
2115
2116                 input_report_switch(tpacpi_inputdev,
2117                                     SW_TABLET_MODE, !!state);
2118                 input_sync(tpacpi_inputdev);
2119
2120                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2121         }
2122 }
2123
2124 static void tpacpi_input_send_key(unsigned int scancode)
2125 {
2126         unsigned int keycode;
2127
2128         keycode = hotkey_keycode_map[scancode];
2129
2130         if (keycode != KEY_RESERVED) {
2131                 mutex_lock(&tpacpi_inputdev_send_mutex);
2132
2133                 input_report_key(tpacpi_inputdev, keycode, 1);
2134                 if (keycode == KEY_UNKNOWN)
2135                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2136                                     scancode);
2137                 input_sync(tpacpi_inputdev);
2138
2139                 input_report_key(tpacpi_inputdev, keycode, 0);
2140                 if (keycode == KEY_UNKNOWN)
2141                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
2142                                     scancode);
2143                 input_sync(tpacpi_inputdev);
2144
2145                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2146         }
2147 }
2148
2149 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2150 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2151
2152 static void tpacpi_hotkey_send_key(unsigned int scancode)
2153 {
2154         tpacpi_input_send_key(scancode);
2155         if (hotkey_report_mode < 2) {
2156                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
2157                                                 0x80, 0x1001 + scancode);
2158         }
2159 }
2160
2161 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
2162 {
2163         u8 d;
2164
2165         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2166                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2167                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2168                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2169                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2170                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2171         }
2172         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
2173                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2174                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2175         }
2176         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2177                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2178                 n->displayexp_toggle =
2179                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2180         }
2181         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2182                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2183                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2184                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2185                 n->brightness_toggle =
2186                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2187         }
2188         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2189                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2190                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2191                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2192                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2193                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2194         }
2195 }
2196
2197 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2198         do { \
2199                 if ((mask & (1 << __scancode)) && \
2200                     oldn->__member != newn->__member) \
2201                 tpacpi_hotkey_send_key(__scancode); \
2202         } while (0)
2203
2204 #define TPACPI_MAY_SEND_KEY(__scancode) \
2205         do { if (mask & (1 << __scancode)) \
2206                 tpacpi_hotkey_send_key(__scancode); } while (0)
2207
2208 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2209                                            struct tp_nvram_state *newn,
2210                                            u32 mask)
2211 {
2212         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2213         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2214         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2215         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2216
2217         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2218
2219         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2220
2221         /* handle volume */
2222         if (oldn->volume_toggle != newn->volume_toggle) {
2223                 if (oldn->mute != newn->mute) {
2224                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2225                 }
2226                 if (oldn->volume_level > newn->volume_level) {
2227                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2228                 } else if (oldn->volume_level < newn->volume_level) {
2229                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2230                 } else if (oldn->mute == newn->mute) {
2231                         /* repeated key presses that didn't change state */
2232                         if (newn->mute) {
2233                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2234                         } else if (newn->volume_level != 0) {
2235                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2236                         } else {
2237                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2238                         }
2239                 }
2240         }
2241
2242         /* handle brightness */
2243         if (oldn->brightness_toggle != newn->brightness_toggle) {
2244                 if (oldn->brightness_level < newn->brightness_level) {
2245                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2246                 } else if (oldn->brightness_level > newn->brightness_level) {
2247                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2248                 } else {
2249                         /* repeated key presses that didn't change state */
2250                         if (newn->brightness_level != 0) {
2251                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2252                         } else {
2253                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2254                         }
2255                 }
2256         }
2257 }
2258
2259 #undef TPACPI_COMPARE_KEY
2260 #undef TPACPI_MAY_SEND_KEY
2261
2262 static int hotkey_kthread(void *data)
2263 {
2264         struct tp_nvram_state s[2];
2265         u32 mask;
2266         unsigned int si, so;
2267         unsigned long t;
2268         unsigned int change_detector, must_reset;
2269
2270         mutex_lock(&hotkey_thread_mutex);
2271
2272         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2273                 goto exit;
2274
2275         set_freezable();
2276
2277         so = 0;
2278         si = 1;
2279         t = 0;
2280
2281         /* Initial state for compares */
2282         mutex_lock(&hotkey_thread_data_mutex);
2283         change_detector = hotkey_config_change;
2284         mask = hotkey_source_mask & hotkey_mask;
2285         mutex_unlock(&hotkey_thread_data_mutex);
2286         hotkey_read_nvram(&s[so], mask);
2287
2288         while (!kthread_should_stop() && hotkey_poll_freq) {
2289                 if (t == 0)
2290                         t = 1000/hotkey_poll_freq;
2291                 t = msleep_interruptible(t);
2292                 if (unlikely(kthread_should_stop()))
2293                         break;
2294                 must_reset = try_to_freeze();
2295                 if (t > 0 && !must_reset)
2296                         continue;
2297
2298                 mutex_lock(&hotkey_thread_data_mutex);
2299                 if (must_reset || hotkey_config_change != change_detector) {
2300                         /* forget old state on thaw or config change */
2301                         si = so;
2302                         t = 0;
2303                         change_detector = hotkey_config_change;
2304                 }
2305                 mask = hotkey_source_mask & hotkey_mask;
2306                 mutex_unlock(&hotkey_thread_data_mutex);
2307
2308                 if (likely(mask)) {
2309                         hotkey_read_nvram(&s[si], mask);
2310                         if (likely(si != so)) {
2311                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2312                                                                 mask);
2313                         }
2314                 }
2315
2316                 so = si;
2317                 si ^= 1;
2318         }
2319
2320 exit:
2321         mutex_unlock(&hotkey_thread_mutex);
2322         return 0;
2323 }
2324
2325 static void hotkey_poll_stop_sync(void)
2326 {
2327         if (tpacpi_hotkey_task) {
2328                 if (frozen(tpacpi_hotkey_task) ||
2329                     freezing(tpacpi_hotkey_task))
2330                         thaw_process(tpacpi_hotkey_task);
2331
2332                 kthread_stop(tpacpi_hotkey_task);
2333                 tpacpi_hotkey_task = NULL;
2334                 mutex_lock(&hotkey_thread_mutex);
2335                 /* at this point, the thread did exit */
2336                 mutex_unlock(&hotkey_thread_mutex);
2337         }
2338 }
2339
2340 /* call with hotkey_mutex held */
2341 static void hotkey_poll_setup(int may_warn)
2342 {
2343         if ((hotkey_source_mask & hotkey_mask) != 0 &&
2344             hotkey_poll_freq > 0 &&
2345             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2346                 if (!tpacpi_hotkey_task) {
2347                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2348                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2349                         if (IS_ERR(tpacpi_hotkey_task)) {
2350                                 tpacpi_hotkey_task = NULL;
2351                                 printk(TPACPI_ERR
2352                                        "could not create kernel thread "
2353                                        "for hotkey polling\n");
2354                         }
2355                 }
2356         } else {
2357                 hotkey_poll_stop_sync();
2358                 if (may_warn &&
2359                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
2360                         printk(TPACPI_NOTICE
2361                                 "hot keys 0x%08x require polling, "
2362                                 "which is currently disabled\n",
2363                                 hotkey_source_mask);
2364                 }
2365         }
2366 }
2367
2368 static void hotkey_poll_setup_safe(int may_warn)
2369 {
2370         mutex_lock(&hotkey_mutex);
2371         hotkey_poll_setup(may_warn);
2372         mutex_unlock(&hotkey_mutex);
2373 }
2374
2375 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2376
2377 static void hotkey_poll_setup_safe(int __unused)
2378 {
2379 }
2380
2381 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2382
2383 static int hotkey_inputdev_open(struct input_dev *dev)
2384 {
2385         switch (tpacpi_lifecycle) {
2386         case TPACPI_LIFE_INIT:
2387                 /*
2388                  * hotkey_init will call hotkey_poll_setup_safe
2389                  * at the appropriate moment
2390                  */
2391                 return 0;
2392         case TPACPI_LIFE_EXITING:
2393                 return -EBUSY;
2394         case TPACPI_LIFE_RUNNING:
2395                 hotkey_poll_setup_safe(0);
2396                 return 0;
2397         }
2398
2399         /* Should only happen if tpacpi_lifecycle is corrupt */
2400         BUG();
2401         return -EBUSY;
2402 }
2403
2404 static void hotkey_inputdev_close(struct input_dev *dev)
2405 {
2406         /* disable hotkey polling when possible */
2407         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2408                 hotkey_poll_setup_safe(0);
2409 }
2410
2411 /* sysfs hotkey enable ------------------------------------------------- */
2412 static ssize_t hotkey_enable_show(struct device *dev,
2413                            struct device_attribute *attr,
2414                            char *buf)
2415 {
2416         int res, status;
2417
2418         printk_deprecated_attribute("hotkey_enable",
2419                         "Hotkey reporting is always enabled");
2420
2421         res = hotkey_status_get(&status);
2422         if (res)
2423                 return res;
2424
2425         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2426 }
2427
2428 static ssize_t hotkey_enable_store(struct device *dev,
2429                             struct device_attribute *attr,
2430                             const char *buf, size_t count)
2431 {
2432         unsigned long t;
2433
2434         printk_deprecated_attribute("hotkey_enable",
2435                         "Hotkeys can be disabled through hotkey_mask");
2436
2437         if (parse_strtoul(buf, 1, &t))
2438                 return -EINVAL;
2439
2440         if (t == 0)
2441                 return -EPERM;
2442
2443         return count;
2444 }
2445
2446 static struct device_attribute dev_attr_hotkey_enable =
2447         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2448                 hotkey_enable_show, hotkey_enable_store);
2449
2450 /* sysfs hotkey mask --------------------------------------------------- */
2451 static ssize_t hotkey_mask_show(struct device *dev,
2452                            struct device_attribute *attr,
2453                            char *buf)
2454 {
2455         int res;
2456
2457         if (mutex_lock_killable(&hotkey_mutex))
2458                 return -ERESTARTSYS;
2459         res = hotkey_mask_get();
2460         mutex_unlock(&hotkey_mutex);
2461
2462         return (res)?
2463                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2464 }
2465
2466 static ssize_t hotkey_mask_store(struct device *dev,
2467                             struct device_attribute *attr,
2468                             const char *buf, size_t count)
2469 {
2470         unsigned long t;
2471         int res;
2472
2473         if (parse_strtoul(buf, 0xffffffffUL, &t))
2474                 return -EINVAL;
2475
2476         if (mutex_lock_killable(&hotkey_mutex))
2477                 return -ERESTARTSYS;
2478
2479         res = hotkey_mask_set(t);
2480
2481 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2482         hotkey_poll_setup(1);
2483 #endif
2484
2485         mutex_unlock(&hotkey_mutex);
2486
2487         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2488
2489         return (res) ? res : count;
2490 }
2491
2492 static struct device_attribute dev_attr_hotkey_mask =
2493         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2494                 hotkey_mask_show, hotkey_mask_store);
2495
2496 /* sysfs hotkey bios_enabled ------------------------------------------- */
2497 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2498                            struct device_attribute *attr,
2499                            char *buf)
2500 {
2501         return sprintf(buf, "0\n");
2502 }
2503
2504 static struct device_attribute dev_attr_hotkey_bios_enabled =
2505         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2506
2507 /* sysfs hotkey bios_mask ---------------------------------------------- */
2508 static ssize_t hotkey_bios_mask_show(struct device *dev,
2509                            struct device_attribute *attr,
2510                            char *buf)
2511 {
2512         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2513 }
2514
2515 static struct device_attribute dev_attr_hotkey_bios_mask =
2516         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2517
2518 /* sysfs hotkey all_mask ----------------------------------------------- */
2519 static ssize_t hotkey_all_mask_show(struct device *dev,
2520                            struct device_attribute *attr,
2521                            char *buf)
2522 {
2523         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2524                                 hotkey_all_mask | hotkey_source_mask);
2525 }
2526
2527 static struct device_attribute dev_attr_hotkey_all_mask =
2528         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2529
2530 /* sysfs hotkey recommended_mask --------------------------------------- */
2531 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2532                                             struct device_attribute *attr,
2533                                             char *buf)
2534 {
2535         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2536                         (hotkey_all_mask | hotkey_source_mask)
2537                         & ~hotkey_reserved_mask);
2538 }
2539
2540 static struct device_attribute dev_attr_hotkey_recommended_mask =
2541         __ATTR(hotkey_recommended_mask, S_IRUGO,
2542                 hotkey_recommended_mask_show, NULL);
2543
2544 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2545
2546 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2547 static ssize_t hotkey_source_mask_show(struct device *dev,
2548                            struct device_attribute *attr,
2549                            char *buf)
2550 {
2551         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2552 }
2553
2554 static ssize_t hotkey_source_mask_store(struct device *dev,
2555                             struct device_attribute *attr,
2556                             const char *buf, size_t count)
2557 {
2558         unsigned long t;
2559
2560         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2561                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2562                 return -EINVAL;
2563
2564         if (mutex_lock_killable(&hotkey_mutex))
2565                 return -ERESTARTSYS;
2566
2567         HOTKEY_CONFIG_CRITICAL_START
2568         hotkey_source_mask = t;
2569         HOTKEY_CONFIG_CRITICAL_END
2570
2571         hotkey_poll_setup(1);
2572
2573         mutex_unlock(&hotkey_mutex);
2574
2575         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2576
2577         return count;
2578 }
2579
2580 static struct device_attribute dev_attr_hotkey_source_mask =
2581         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2582                 hotkey_source_mask_show, hotkey_source_mask_store);
2583
2584 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2585 static ssize_t hotkey_poll_freq_show(struct device *dev,
2586                            struct device_attribute *attr,
2587                            char *buf)
2588 {
2589         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2590 }
2591
2592 static ssize_t hotkey_poll_freq_store(struct device *dev,
2593                             struct device_attribute *attr,
2594                             const char *buf, size_t count)
2595 {
2596         unsigned long t;
2597
2598         if (parse_strtoul(buf, 25, &t))
2599                 return -EINVAL;
2600
2601         if (mutex_lock_killable(&hotkey_mutex))
2602                 return -ERESTARTSYS;
2603
2604         hotkey_poll_freq = t;
2605
2606         hotkey_poll_setup(1);
2607         mutex_unlock(&hotkey_mutex);
2608
2609         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2610
2611         return count;
2612 }
2613
2614 static struct device_attribute dev_attr_hotkey_poll_freq =
2615         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2616                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2617
2618 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2619
2620 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2621 static ssize_t hotkey_radio_sw_show(struct device *dev,
2622                            struct device_attribute *attr,
2623                            char *buf)
2624 {
2625         int res;
2626         res = hotkey_get_wlsw();
2627         if (res < 0)
2628                 return res;
2629
2630         /* Opportunistic update */
2631         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2632
2633         return snprintf(buf, PAGE_SIZE, "%d\n",
2634                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2635 }
2636
2637 static struct device_attribute dev_attr_hotkey_radio_sw =
2638         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2639
2640 static void hotkey_radio_sw_notify_change(void)
2641 {
2642         if (tp_features.hotkey_wlsw)
2643                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2644                              "hotkey_radio_sw");
2645 }
2646
2647 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2648 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2649                            struct device_attribute *attr,
2650                            char *buf)
2651 {
2652         int res, s;
2653         res = hotkey_get_tablet_mode(&s);
2654         if (res < 0)
2655                 return res;
2656
2657         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2658 }
2659
2660 static struct device_attribute dev_attr_hotkey_tablet_mode =
2661         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2662
2663 static void hotkey_tablet_mode_notify_change(void)
2664 {
2665         if (tp_features.hotkey_tablet)
2666                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2667                              "hotkey_tablet_mode");
2668 }
2669
2670 /* sysfs hotkey report_mode -------------------------------------------- */
2671 static ssize_t hotkey_report_mode_show(struct device *dev,
2672                            struct device_attribute *attr,
2673                            char *buf)
2674 {
2675         return snprintf(buf, PAGE_SIZE, "%d\n",
2676                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2677 }
2678
2679 static struct device_attribute dev_attr_hotkey_report_mode =
2680         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2681
2682 /* sysfs wakeup reason (pollable) -------------------------------------- */
2683 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2684                            struct device_attribute *attr,
2685                            char *buf)
2686 {
2687         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2688 }
2689
2690 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2691         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2692
2693 static void hotkey_wakeup_reason_notify_change(void)
2694 {
2695         if (tp_features.hotkey_mask)
2696                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2697                              "wakeup_reason");
2698 }
2699
2700 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2701 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2702                            struct device_attribute *attr,
2703                            char *buf)
2704 {
2705         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2706 }
2707
2708 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2709         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2710                hotkey_wakeup_hotunplug_complete_show, NULL);
2711
2712 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2713 {
2714         if (tp_features.hotkey_mask)
2715                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2716                              "wakeup_hotunplug_complete");
2717 }
2718
2719 /* --------------------------------------------------------------------- */
2720
2721 static struct attribute *hotkey_attributes[] __initdata = {
2722         &dev_attr_hotkey_enable.attr,
2723         &dev_attr_hotkey_bios_enabled.attr,
2724         &dev_attr_hotkey_report_mode.attr,
2725 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2726         &dev_attr_hotkey_mask.attr,
2727         &dev_attr_hotkey_all_mask.attr,
2728         &dev_attr_hotkey_recommended_mask.attr,
2729         &dev_attr_hotkey_source_mask.attr,
2730         &dev_attr_hotkey_poll_freq.attr,
2731 #endif
2732 };
2733
2734 static struct attribute *hotkey_mask_attributes[] __initdata = {
2735         &dev_attr_hotkey_bios_mask.attr,
2736 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2737         &dev_attr_hotkey_mask.attr,
2738         &dev_attr_hotkey_all_mask.attr,
2739         &dev_attr_hotkey_recommended_mask.attr,
2740 #endif
2741         &dev_attr_hotkey_wakeup_reason.attr,
2742         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2743 };
2744
2745 /*
2746  * Sync both the hw and sw blocking state of all switches
2747  */
2748 static void tpacpi_send_radiosw_update(void)
2749 {
2750         int wlsw;
2751
2752         /*
2753          * We must sync all rfkill controllers *before* issuing any
2754          * rfkill input events, or we will race the rfkill core input
2755          * handler.
2756          *
2757          * tpacpi_inputdev_send_mutex works as a syncronization point
2758          * for the above.
2759          *
2760          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2761          */
2762
2763         wlsw = hotkey_get_wlsw();
2764
2765         /* Sync hw blocking state first if it is hw-blocked */
2766         if (wlsw == TPACPI_RFK_RADIO_OFF)
2767                 tpacpi_rfk_update_hwblock_state(true);
2768
2769         /* Sync sw blocking state */
2770         tpacpi_rfk_update_swstate_all();
2771
2772         /* Sync hw blocking state last if it is hw-unblocked */
2773         if (wlsw == TPACPI_RFK_RADIO_ON)
2774                 tpacpi_rfk_update_hwblock_state(false);
2775
2776         /* Issue rfkill input event for WLSW switch */
2777         if (!(wlsw < 0)) {
2778                 mutex_lock(&tpacpi_inputdev_send_mutex);
2779
2780                 input_report_switch(tpacpi_inputdev,
2781                                     SW_RFKILL_ALL, (wlsw > 0));
2782                 input_sync(tpacpi_inputdev);
2783
2784                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2785         }
2786
2787         /*
2788          * this can be unconditional, as we will poll state again
2789          * if userspace uses the notify to read data
2790          */
2791         hotkey_radio_sw_notify_change();
2792 }
2793
2794 static void hotkey_exit(void)
2795 {
2796 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2797         hotkey_poll_stop_sync();
2798 #endif
2799
2800         if (hotkey_dev_attributes)
2801                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2802
2803         kfree(hotkey_keycode_map);
2804
2805         if (tp_features.hotkey) {
2806                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2807                            "restoring original hot key mask\n");
2808                 /* no short-circuit boolean operator below! */
2809                 if ((hotkey_mask_set(hotkey_orig_mask) |
2810                      hotkey_status_set(false)) != 0)
2811                         printk(TPACPI_ERR
2812                                "failed to restore hot key mask "
2813                                "to BIOS defaults\n");
2814         }
2815 }
2816
2817 static int __init hotkey_init(struct ibm_init_struct *iibm)
2818 {
2819         /* Requirements for changing the default keymaps:
2820          *
2821          * 1. Many of the keys are mapped to KEY_RESERVED for very
2822          *    good reasons.  Do not change them unless you have deep
2823          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2824          *    the various ThinkPad models.  The driver behaves
2825          *    differently for KEY_RESERVED: such keys have their
2826          *    hot key mask *unset* in mask_recommended, and also
2827          *    in the initial hot key mask programmed into the
2828          *    firmware at driver load time, which means the firm-
2829          *    ware may react very differently if you change them to
2830          *    something else;
2831          *
2832          * 2. You must be subscribed to the linux-thinkpad and
2833          *    ibm-acpi-devel mailing lists, and you should read the
2834          *    list archives since 2007 if you want to change the
2835          *    keymaps.  This requirement exists so that you will
2836          *    know the past history of problems with the thinkpad-
2837          *    acpi driver keymaps, and also that you will be
2838          *    listening to any bug reports;
2839          *
2840          * 3. Do not send thinkpad-acpi specific patches directly to
2841          *    for merging, *ever*.  Send them to the linux-acpi
2842          *    mailinglist for comments.  Merging is to be done only
2843          *    through acpi-test and the ACPI maintainer.
2844          *
2845          * If the above is too much to ask, don't change the keymap.
2846          * Ask the thinkpad-acpi maintainer to do it, instead.
2847          */
2848         static u16 ibm_keycode_map[] __initdata = {
2849                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2850                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2851                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2852                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2853
2854                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2855                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2856                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2857                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2858
2859                 /* brightness: firmware always reacts to them, unless
2860                  * X.org did some tricks in the radeon BIOS scratch
2861                  * registers of *some* models */
2862                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2863                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2864
2865                 /* Thinklight: firmware always react to it */
2866                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2867
2868                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2869                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2870
2871                 /* Volume: firmware always react to it and reprograms
2872                  * the built-in *extra* mixer.  Never map it to control
2873                  * another mixer by default. */
2874                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2875                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2876                 KEY_RESERVED,   /* 0x16: MUTE */
2877
2878                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2879
2880                 /* (assignments unknown, please report if found) */
2881                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2882                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2883         };
2884         static u16 lenovo_keycode_map[] __initdata = {
2885                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2886                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2887                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2888                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2889
2890                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2891                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2892                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2893                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2894
2895                 /* These either have to go through ACPI video, or
2896                  * act like in the IBM ThinkPads, so don't ever
2897                  * enable them by default */
2898                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2899                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2900
2901                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2902
2903                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2904                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2905
2906                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2907                  * react to it and reprograms the built-in *extra* mixer.
2908                  * Never map it to control another mixer by default.
2909                  *
2910                  * T60?, T61, R60?, R61: firmware and EC tries to send
2911                  * these over the regular keyboard, so these are no-ops,
2912                  * but there are still weird bugs re. MUTE, so do not
2913                  * change unless you get test reports from all Lenovo
2914                  * models.  May cause the BIOS to interfere with the
2915                  * HDA mixer.
2916                  */
2917                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2918                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2919                 KEY_RESERVED,   /* 0x16: MUTE */
2920
2921                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2922
2923                 /* (assignments unknown, please report if found) */
2924                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2925                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2926         };
2927
2928 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2929 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2930 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2931
2932         int res, i;
2933         int status;
2934         int hkeyv;
2935
2936         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2937                         "initializing hotkey subdriver\n");
2938
2939         BUG_ON(!tpacpi_inputdev);
2940         BUG_ON(tpacpi_inputdev->open != NULL ||
2941                tpacpi_inputdev->close != NULL);
2942
2943         TPACPI_ACPIHANDLE_INIT(hkey);
2944         mutex_init(&hotkey_mutex);
2945
2946 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2947         mutex_init(&hotkey_thread_mutex);
2948         mutex_init(&hotkey_thread_data_mutex);
2949 #endif
2950
2951         /* hotkey not supported on 570 */
2952         tp_features.hotkey = hkey_handle != NULL;
2953
2954         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2955                 "hotkeys are %s\n",
2956                 str_supported(tp_features.hotkey));
2957
2958         if (!tp_features.hotkey)
2959                 return 1;
2960
2961         tpacpi_disable_brightness_delay();
2962
2963         hotkey_dev_attributes = create_attr_set(13, NULL);
2964         if (!hotkey_dev_attributes)
2965                 return -ENOMEM;
2966         res = add_many_to_attr_set(hotkey_dev_attributes,
2967                         hotkey_attributes,
2968                         ARRAY_SIZE(hotkey_attributes));
2969         if (res)
2970                 goto err_exit;
2971
2972         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2973            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2974            for HKEY interface version 0x100 */
2975         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2976                 if ((hkeyv >> 8) != 1) {
2977                         printk(TPACPI_ERR "unknown version of the "
2978                                "HKEY interface: 0x%x\n", hkeyv);
2979                         printk(TPACPI_ERR "please report this to %s\n",
2980                                TPACPI_MAIL);
2981                 } else {
2982                         /*
2983                          * MHKV 0x100 in A31, R40, R40e,
2984                          * T4x, X31, and later
2985                          */
2986                         tp_features.hotkey_mask = 1;
2987                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2988                                 "firmware HKEY interface version: 0x%x\n",
2989                                 hkeyv);
2990                 }
2991         }
2992
2993         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2994                 "hotkey masks are %s\n",
2995                 str_supported(tp_features.hotkey_mask));
2996
2997         if (tp_features.hotkey_mask) {
2998                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2999                                 "MHKA", "qd")) {
3000                         printk(TPACPI_ERR
3001                                "missing MHKA handler, "
3002                                "please report this to %s\n",
3003                                TPACPI_MAIL);
3004                         /* FN+F12, FN+F4, FN+F3 */
3005                         hotkey_all_mask = 0x080cU;
3006                 }
3007         }
3008
3009         /* hotkey_source_mask *must* be zero for
3010          * the first hotkey_mask_get */
3011         if (tp_features.hotkey_mask) {
3012                 res = hotkey_mask_get();
3013                 if (res)
3014                         goto err_exit;
3015
3016                 hotkey_orig_mask = hotkey_mask;
3017                 res = add_many_to_attr_set(
3018                                 hotkey_dev_attributes,
3019                                 hotkey_mask_attributes,
3020                                 ARRAY_SIZE(hotkey_mask_attributes));
3021                 if (res)
3022                         goto err_exit;
3023         }
3024
3025 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3026         if (tp_features.hotkey_mask) {
3027                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3028                                         & ~hotkey_all_mask;
3029         } else {
3030                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
3031         }
3032
3033         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3034                     "hotkey source mask 0x%08x, polling freq %d\n",
3035                     hotkey_source_mask, hotkey_poll_freq);
3036 #endif
3037
3038 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3039         if (dbg_wlswemul) {
3040                 tp_features.hotkey_wlsw = 1;
3041                 printk(TPACPI_INFO
3042                         "radio switch emulation enabled\n");
3043         } else
3044 #endif
3045         /* Not all thinkpads have a hardware radio switch */
3046         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3047                 tp_features.hotkey_wlsw = 1;
3048                 printk(TPACPI_INFO
3049                         "radio switch found; radios are %s\n",
3050                         enabled(status, 0));
3051         }
3052         if (tp_features.hotkey_wlsw)
3053                 res = add_to_attr_set(hotkey_dev_attributes,
3054                                 &dev_attr_hotkey_radio_sw.attr);
3055
3056         /* For X41t, X60t, X61t Tablets... */
3057         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
3058                 tp_features.hotkey_tablet = 1;
3059                 printk(TPACPI_INFO
3060                         "possible tablet mode switch found; "
3061                         "ThinkPad in %s mode\n",
3062                         (status & TP_HOTKEY_TABLET_MASK)?
3063                                 "tablet" : "laptop");
3064                 res = add_to_attr_set(hotkey_dev_attributes,
3065                                 &dev_attr_hotkey_tablet_mode.attr);
3066         }
3067
3068         if (!res)
3069                 res = register_attr_set_with_sysfs(
3070                                 hotkey_dev_attributes,
3071                                 &tpacpi_pdev->dev.kobj);
3072         if (res)
3073                 goto err_exit;
3074
3075         /* Set up key map */
3076
3077         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
3078                                         GFP_KERNEL);
3079         if (!hotkey_keycode_map) {
3080                 printk(TPACPI_ERR
3081                         "failed to allocate memory for key map\n");
3082                 res = -ENOMEM;
3083                 goto err_exit;
3084         }
3085
3086         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
3087                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3088                            "using Lenovo default hot key map\n");
3089                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
3090                         TPACPI_HOTKEY_MAP_SIZE);
3091         } else {
3092                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3093                            "using IBM default hot key map\n");
3094                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
3095                         TPACPI_HOTKEY_MAP_SIZE);
3096         }
3097
3098         set_bit(EV_KEY, tpacpi_inputdev->evbit);
3099         set_bit(EV_MSC, tpacpi_inputdev->evbit);
3100         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
3101         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3102         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3103         tpacpi_inputdev->keycode = hotkey_keycode_map;
3104         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3105                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
3106                         set_bit(hotkey_keycode_map[i],
3107                                 tpacpi_inputdev->keybit);
3108                 } else {
3109                         if (i < sizeof(hotkey_reserved_mask)*8)
3110                                 hotkey_reserved_mask |= 1 << i;
3111                 }
3112         }
3113
3114         if (tp_features.hotkey_wlsw) {
3115                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3116                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
3117         }
3118         if (tp_features.hotkey_tablet) {
3119                 set_bit(EV_SW, tpacpi_inputdev->evbit);
3120                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
3121         }
3122
3123         /* Do not issue duplicate brightness change events to
3124          * userspace */
3125         if (!tp_features.bright_acpimode)
3126                 /* update bright_acpimode... */
3127                 tpacpi_check_std_acpi_brightness_support();
3128
3129         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
3130                 printk(TPACPI_INFO
3131                        "This ThinkPad has standard ACPI backlight "
3132                        "brightness control, supported by the ACPI "
3133                        "video driver\n");
3134                 printk(TPACPI_NOTICE
3135                        "Disabling thinkpad-acpi brightness events "
3136                        "by default...\n");
3137
3138                 /* The hotkey_reserved_mask change below is not
3139                  * necessary while the keys are at KEY_RESERVED in the
3140                  * default map, but better safe than sorry, leave it
3141                  * here as a marker of what we have to do, especially
3142                  * when we finally become able to set this at runtime
3143                  * on response to X.org requests */
3144                 hotkey_reserved_mask |=
3145                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3146                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3147         }
3148
3149         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3150                         "enabling firmware HKEY event interface...\n");
3151         res = hotkey_status_set(true);
3152         if (res) {
3153                 hotkey_exit();
3154                 return res;
3155         }
3156         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
3157                                 & ~hotkey_reserved_mask)
3158                                 | hotkey_orig_mask);
3159         if (res < 0 && res != -ENXIO) {
3160                 hotkey_exit();
3161                 return res;
3162         }
3163
3164         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3165                         "legacy ibm/hotkey event reporting over procfs %s\n",
3166                         (hotkey_report_mode < 2) ?
3167                                 "enabled" : "disabled");
3168
3169         tpacpi_inputdev->open = &hotkey_inputdev_open;
3170         tpacpi_inputdev->close = &hotkey_inputdev_close;
3171
3172         hotkey_poll_setup_safe(1);
3173         tpacpi_send_radiosw_update();
3174         tpacpi_input_send_tabletsw();
3175
3176         return 0;
3177
3178 err_exit:
3179         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
3180         hotkey_dev_attributes = NULL;
3181
3182         return (res < 0)? res : 1;
3183 }
3184
3185 static bool hotkey_notify_hotkey(const u32 hkey,
3186                                  bool *send_acpi_ev,
3187                                  bool *ignore_acpi_ev)
3188 {
3189         /* 0x1000-0x1FFF: key presses */
3190         unsigned int scancode = hkey & 0xfff;
3191         *send_acpi_ev = true;
3192         *ignore_acpi_ev = false;
3193
3194         if (scancode > 0 && scancode < 0x21) {
3195                 scancode--;
3196                 if (!(hotkey_source_mask & (1 << scancode))) {
3197                         tpacpi_input_send_key(scancode);
3198                         *send_acpi_ev = false;
3199                 } else {
3200                         *ignore_acpi_ev = true;
3201                 }
3202                 return true;
3203         }
3204         return false;
3205 }
3206
3207 static bool hotkey_notify_wakeup(const u32 hkey,
3208                                  bool *send_acpi_ev,
3209                                  bool *ignore_acpi_ev)
3210 {
3211         /* 0x2000-0x2FFF: Wakeup reason */
3212         *send_acpi_ev = true;
3213         *ignore_acpi_ev = false;
3214
3215         switch (hkey) {
3216         case 0x2304: /* suspend, undock */
3217         case 0x2404: /* hibernation, undock */
3218                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3219                 *ignore_acpi_ev = true;
3220                 break;
3221
3222         case 0x2305: /* suspend, bay eject */
3223         case 0x2405: /* hibernation, bay eject */
3224                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3225                 *ignore_acpi_ev = true;
3226                 break;
3227
3228         case 0x2313: /* Battery on critical low level (S3) */
3229         case 0x2413: /* Battery on critical low level (S4) */
3230                 printk(TPACPI_ALERT
3231                         "EMERGENCY WAKEUP: battery almost empty\n");
3232                 /* how to auto-heal: */
3233                 /* 2313: woke up from S3, go to S4/S5 */
3234                 /* 2413: woke up from S4, go to S5 */
3235                 break;
3236
3237         default:
3238                 return false;
3239         }
3240
3241         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3242                 printk(TPACPI_INFO
3243                        "woke up due to a hot-unplug "
3244                        "request...\n");
3245                 hotkey_wakeup_reason_notify_change();
3246         }
3247         return true;
3248 }
3249
3250 static bool hotkey_notify_usrevent(const u32 hkey,
3251                                  bool *send_acpi_ev,
3252                                  bool *ignore_acpi_ev)
3253 {
3254         /* 0x5000-0x5FFF: human interface helpers */
3255         *send_acpi_ev = true;
3256         *ignore_acpi_ev = false;
3257
3258         switch (hkey) {
3259         case 0x5010: /* Lenovo new BIOS: brightness changed */
3260         case 0x500b: /* X61t: tablet pen inserted into bay */
3261         case 0x500c: /* X61t: tablet pen removed from bay */
3262                 return true;
3263
3264         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3265         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3266                 tpacpi_input_send_tabletsw();
3267                 hotkey_tablet_mode_notify_change();
3268                 *send_acpi_ev = false;
3269                 return true;
3270
3271         case 0x5001:
3272         case 0x5002:
3273                 /* LID switch events.  Do not propagate */
3274                 *ignore_acpi_ev = true;
3275                 return true;
3276
3277         default:
3278                 return false;
3279         }
3280 }
3281
3282 static bool hotkey_notify_thermal(const u32 hkey,
3283                                  bool *send_acpi_ev,
3284                                  bool *ignore_acpi_ev)
3285 {
3286         /* 0x6000-0x6FFF: thermal alarms */
3287         *send_acpi_ev = true;
3288         *ignore_acpi_ev = false;
3289
3290         switch (hkey) {
3291         case 0x6011:
3292                 printk(TPACPI_CRIT
3293                         "THERMAL ALARM: battery is too hot!\n");
3294                 /* recommended action: warn user through gui */
3295                 return true;
3296         case 0x6012:
3297                 printk(TPACPI_ALERT
3298                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3299                 /* recommended action: immediate sleep/hibernate */
3300                 return true;
3301         case 0x6021:
3302                 printk(TPACPI_CRIT
3303                         "THERMAL ALARM: "
3304                         "a sensor reports something is too hot!\n");
3305                 /* recommended action: warn user through gui, that */
3306                 /* some internal component is too hot */
3307                 return true;
3308         case 0x6022:
3309                 printk(TPACPI_ALERT
3310                         "THERMAL EMERGENCY: "
3311                         "a sensor reports something is extremely hot!\n");
3312                 /* recommended action: immediate sleep/hibernate */
3313                 return true;
3314         case 0x6030:
3315                 printk(TPACPI_INFO
3316                         "EC reports that Thermal Table has changed\n");
3317                 /* recommended action: do nothing, we don't have
3318                  * Lenovo ATM information */
3319                 return true;
3320         default:
3321                 printk(TPACPI_ALERT
3322                          "THERMAL ALERT: unknown thermal alarm received\n");
3323                 return false;
3324         }
3325 }
3326
3327 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3328 {
3329         u32 hkey;
3330         bool send_acpi_ev;
3331         bool ignore_acpi_ev;
3332         bool known_ev;
3333
3334         if (event != 0x80) {
3335                 printk(TPACPI_ERR
3336                        "unknown HKEY notification event %d\n", event);
3337                 /* forward it to userspace, maybe it knows how to handle it */
3338                 acpi_bus_generate_netlink_event(
3339                                         ibm->acpi->device->pnp.device_class,
3340                                         dev_name(&ibm->acpi->device->dev),
3341                                         event, 0);
3342                 return;
3343         }
3344
3345         while (1) {
3346                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3347                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3348                         return;
3349                 }
3350
3351                 if (hkey == 0) {
3352                         /* queue empty */
3353                         return;
3354                 }
3355
3356                 send_acpi_ev = true;
3357                 ignore_acpi_ev = false;
3358
3359                 switch (hkey >> 12) {
3360                 case 1:
3361                         /* 0x1000-0x1FFF: key presses */
3362                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3363                                                  &ignore_acpi_ev);
3364                         break;
3365                 case 2:
3366                         /* 0x2000-0x2FFF: Wakeup reason */
3367                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3368                                                  &ignore_acpi_ev);
3369                         break;
3370                 case 3:
3371                         /* 0x3000-0x3FFF: bay-related wakeups */
3372                         if (hkey == 0x3003) {
3373                                 hotkey_autosleep_ack = 1;
3374                                 printk(TPACPI_INFO
3375                                        "bay ejected\n");
3376                                 hotkey_wakeup_hotunplug_complete_notify_change();
3377                                 known_ev = true;
3378                         } else {
3379                                 known_ev = false;
3380                         }
3381                         break;
3382                 case 4:
3383                         /* 0x4000-0x4FFF: dock-related wakeups */
3384                         if (hkey == 0x4003) {
3385                                 hotkey_autosleep_ack = 1;
3386                                 printk(TPACPI_INFO
3387                                        "undocked\n");
3388                                 hotkey_wakeup_hotunplug_complete_notify_change();
3389                                 known_ev = true;
3390                         } else {
3391                                 known_ev = false;
3392                         }
3393                         break;
3394                 case 5:
3395                         /* 0x5000-0x5FFF: human interface helpers */
3396                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3397                                                  &ignore_acpi_ev);
3398                         break;
3399                 case 6:
3400                         /* 0x6000-0x6FFF: thermal alarms */
3401                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3402                                                  &ignore_acpi_ev);
3403                         break;
3404                 case 7:
3405                         /* 0x7000-0x7FFF: misc */
3406                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3407                                 tpacpi_send_radiosw_update();
3408                                 send_acpi_ev = 0;
3409                                 known_ev = true;
3410                                 break;
3411                         }
3412                         /* fallthrough to default */
3413                 default:
3414                         known_ev = false;
3415                 }
3416                 if (!known_ev) {
3417                         printk(TPACPI_NOTICE
3418                                "unhandled HKEY event 0x%04x\n", hkey);
3419                         printk(TPACPI_NOTICE
3420                                "please report the conditions when this "
3421                                "event happened to %s\n", TPACPI_MAIL);
3422                 }
3423
3424                 /* Legacy events */
3425                 if (!ignore_acpi_ev &&
3426                     (send_acpi_ev || hotkey_report_mode < 2)) {
3427                         acpi_bus_generate_proc_event(ibm->acpi->device,
3428                                                      event, hkey);
3429                 }
3430
3431                 /* netlink events */
3432                 if (!ignore_acpi_ev && send_acpi_ev) {
3433                         acpi_bus_generate_netlink_event(
3434                                         ibm->acpi->device->pnp.device_class,
3435                                         dev_name(&ibm->acpi->device->dev),
3436                                         event, hkey);
3437                 }
3438         }
3439 }
3440
3441 static void hotkey_suspend(pm_message_t state)
3442 {
3443         /* Do these on suspend, we get the events on early resume! */
3444         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3445         hotkey_autosleep_ack = 0;
3446 }
3447
3448 static void hotkey_resume(void)
3449 {
3450         tpacpi_disable_brightness_delay();
3451
3452         if (hotkey_mask_get())
3453                 printk(TPACPI_ERR
3454                        "error while trying to read hot key mask "
3455                        "from firmware\n");
3456         tpacpi_send_radiosw_update();
3457         hotkey_tablet_mode_notify_change();
3458         hotkey_wakeup_reason_notify_change();
3459         hotkey_wakeup_hotunplug_complete_notify_change();
3460         hotkey_poll_setup_safe(0);
3461 }
3462
3463 /* procfs -------------------------------------------------------------- */
3464 static int hotkey_read(char *p)
3465 {
3466         int res, status;
3467         int len = 0;
3468
3469         if (!tp_features.hotkey) {
3470                 len += sprintf(p + len, "status:\t\tnot supported\n");
3471                 return len;
3472         }
3473
3474         if (mutex_lock_killable(&hotkey_mutex))
3475                 return -ERESTARTSYS;
3476         res = hotkey_status_get(&status);
3477         if (!res)
3478                 res = hotkey_mask_get();
3479         mutex_unlock(&hotkey_mutex);
3480         if (res)
3481                 return res;
3482
3483         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3484         if (tp_features.hotkey_mask) {
3485                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3486                 len += sprintf(p + len,
3487                                "commands:\tenable, disable, reset, <mask>\n");
3488         } else {
3489                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3490                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3491         }
3492
3493         return len;
3494 }
3495
3496 static void hotkey_enabledisable_warn(bool enable)
3497 {
3498         tpacpi_log_usertask("procfs hotkey enable/disable");
3499         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3500                         TPACPI_WARN
3501                         "hotkey enable/disable functionality has been "
3502                         "removed from the driver.  Hotkeys are always "
3503                         "enabled\n"))
3504                 printk(TPACPI_ERR
3505                         "Please remove the hotkey=enable module "
3506                         "parameter, it is deprecated.  Hotkeys are always "
3507                         "enabled\n");
3508 }
3509
3510 static int hotkey_write(char *buf)
3511 {
3512         int res;
3513         u32 mask;
3514         char *cmd;
3515
3516         if (!tp_features.hotkey)
3517                 return -ENODEV;
3518
3519         if (mutex_lock_killable(&hotkey_mutex))
3520                 return -ERESTARTSYS;
3521
3522         mask = hotkey_mask;
3523
3524         res = 0;
3525         while ((cmd = next_cmd(&buf))) {
3526                 if (strlencmp(cmd, "enable") == 0) {
3527                         hotkey_enabledisable_warn(1);
3528                 } else if (strlencmp(cmd, "disable") == 0) {
3529                         hotkey_enabledisable_warn(0);
3530                         res = -EPERM;
3531                 } else if (strlencmp(cmd, "reset") == 0) {
3532                         mask = hotkey_orig_mask;
3533                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3534                         /* mask set */
3535                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3536                         /* mask set */
3537                 } else {
3538                         res = -EINVAL;
3539                         goto errexit;
3540                 }
3541         }
3542
3543         if (!res)
3544                 tpacpi_disclose_usertask("procfs hotkey",
3545                         "set mask to 0x%08x\n", mask);
3546
3547         if (!res && mask != hotkey_mask)
3548                 res = hotkey_mask_set(mask);
3549
3550 errexit:
3551         mutex_unlock(&hotkey_mutex);
3552         return res;
3553 }
3554
3555 static const struct acpi_device_id ibm_htk_device_ids[] = {
3556         {TPACPI_ACPI_HKEY_HID, 0},
3557         {"", 0},
3558 };
3559
3560 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3561         .hid = ibm_htk_device_ids,
3562         .notify = hotkey_notify,
3563         .handle = &hkey_handle,
3564         .type = ACPI_DEVICE_NOTIFY,
3565 };
3566
3567 static struct ibm_struct hotkey_driver_data = {
3568         .name = "hotkey",
3569         .read = hotkey_read,
3570         .write = hotkey_write,
3571         .exit = hotkey_exit,
3572         .resume = hotkey_resume,
3573         .suspend = hotkey_suspend,
3574         .acpi = &ibm_hotkey_acpidriver,
3575 };
3576
3577 /*************************************************************************
3578  * Bluetooth subdriver
3579  */
3580
3581 enum {
3582         /* ACPI GBDC/SBDC bits */
3583         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3584         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3585         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3586                                                    off / last state */
3587 };
3588
3589 enum {
3590         /* ACPI \BLTH commands */
3591         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3592         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3593         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3594         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3595         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3596 };
3597
3598 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3599
3600 static void bluetooth_suspend(pm_message_t state)
3601 {
3602         /* Try to make sure radio will resume powered off */
3603         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3604                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3605                 vdbg_printk(TPACPI_DBG_RFKILL,
3606                         "bluetooth power down on resume request failed\n");
3607 }
3608
3609 static int bluetooth_get_status(void)
3610 {
3611         int status;
3612
3613 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3614         if (dbg_bluetoothemul)
3615                 return (tpacpi_bluetooth_emulstate) ?
3616                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3617 #endif
3618
3619         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3620                 return -EIO;
3621
3622         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3623                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3624 }
3625
3626 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3627 {
3628         int status;
3629
3630         vdbg_printk(TPACPI_DBG_RFKILL,
3631                 "will attempt to %s bluetooth\n",
3632                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3633
3634 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3635         if (dbg_bluetoothemul) {
3636                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3637                 return 0;
3638         }
3639 #endif
3640
3641         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3642         if (state == TPACPI_RFK_RADIO_ON)
3643                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3644         else
3645                 status = 0;
3646
3647         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3648                 return -EIO;
3649
3650         return 0;
3651 }
3652
3653 /* sysfs bluetooth enable ---------------------------------------------- */
3654 static ssize_t bluetooth_enable_show(struct device *dev,
3655                            struct device_attribute *attr,
3656                            char *buf)
3657 {
3658         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3659                         attr, buf);
3660 }
3661
3662 static ssize_t bluetooth_enable_store(struct device *dev,
3663                             struct device_attribute *attr,
3664                             const char *buf, size_t count)
3665 {
3666         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3667                                 attr, buf, count);
3668 }
3669
3670 static struct device_attribute dev_attr_bluetooth_enable =
3671         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3672                 bluetooth_enable_show, bluetooth_enable_store);
3673
3674 /* --------------------------------------------------------------------- */
3675
3676 static struct attribute *bluetooth_attributes[] = {
3677         &dev_attr_bluetooth_enable.attr,
3678         NULL
3679 };
3680
3681 static const struct attribute_group bluetooth_attr_group = {
3682         .attrs = bluetooth_attributes,
3683 };
3684
3685 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3686         .get_status = bluetooth_get_status,
3687         .set_status = bluetooth_set_status,
3688 };
3689
3690 static void bluetooth_shutdown(void)
3691 {
3692         /* Order firmware to save current state to NVRAM */
3693         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3694                         TP_ACPI_BLTH_SAVE_STATE))
3695                 printk(TPACPI_NOTICE
3696                         "failed to save bluetooth state to NVRAM\n");
3697         else
3698                 vdbg_printk(TPACPI_DBG_RFKILL,
3699                         "bluestooth state saved to NVRAM\n");
3700 }
3701
3702 static void bluetooth_exit(void)
3703 {
3704         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3705                         &bluetooth_attr_group);
3706
3707         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3708
3709         bluetooth_shutdown();
3710 }
3711
3712 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3713 {
3714         int res;
3715         int status = 0;
3716
3717         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3718                         "initializing bluetooth subdriver\n");
3719
3720         TPACPI_ACPIHANDLE_INIT(hkey);
3721
3722         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3723            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3724         tp_features.bluetooth = hkey_handle &&
3725             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3726
3727         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3728                 "bluetooth is %s, status 0x%02x\n",
3729                 str_supported(tp_features.bluetooth),
3730                 status);
3731
3732 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3733         if (dbg_bluetoothemul) {
3734                 tp_features.bluetooth = 1;
3735                 printk(TPACPI_INFO
3736                         "bluetooth switch emulation enabled\n");
3737         } else
3738 #endif
3739         if (tp_features.bluetooth &&
3740             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3741                 /* no bluetooth hardware present in system */
3742                 tp_features.bluetooth = 0;
3743                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3744                            "bluetooth hardware not installed\n");
3745         }
3746
3747         if (!tp_features.bluetooth)
3748                 return 1;
3749
3750         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3751                                 &bluetooth_tprfk_ops,
3752                                 RFKILL_TYPE_BLUETOOTH,
3753                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3754                                 true);
3755         if (res)
3756                 return res;
3757
3758         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3759                                 &bluetooth_attr_group);
3760         if (res) {
3761                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3762                 return res;
3763         }
3764
3765         return 0;
3766 }
3767
3768 /* procfs -------------------------------------------------------------- */
3769 static int bluetooth_read(char *p)
3770 {
3771         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3772 }
3773
3774 static int bluetooth_write(char *buf)
3775 {
3776         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3777 }
3778
3779 static struct ibm_struct bluetooth_driver_data = {
3780         .name = "bluetooth",
3781         .read = bluetooth_read,
3782         .write = bluetooth_write,
3783         .exit = bluetooth_exit,
3784         .suspend = bluetooth_suspend,
3785         .shutdown = bluetooth_shutdown,
3786 };
3787
3788 /*************************************************************************
3789  * Wan subdriver
3790  */
3791
3792 enum {
3793         /* ACPI GWAN/SWAN bits */
3794         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3795         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3796         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3797                                                    off / last state */
3798 };
3799
3800 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3801
3802 static void wan_suspend(pm_message_t state)
3803 {
3804         /* Try to make sure radio will resume powered off */
3805         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3806                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3807                 vdbg_printk(TPACPI_DBG_RFKILL,
3808                         "WWAN power down on resume request failed\n");
3809 }
3810
3811 static int wan_get_status(void)
3812 {
3813         int status;
3814
3815 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3816         if (dbg_wwanemul)
3817                 return (tpacpi_wwan_emulstate) ?
3818                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3819 #endif
3820
3821         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3822                 return -EIO;
3823
3824         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3825                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3826 }
3827
3828 static int wan_set_status(enum tpacpi_rfkill_state state)
3829 {
3830         int status;
3831
3832         vdbg_printk(TPACPI_DBG_RFKILL,
3833                 "will attempt to %s wwan\n",
3834                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3835
3836 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3837         if (dbg_wwanemul) {
3838                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3839                 return 0;
3840         }
3841 #endif
3842
3843         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3844         if (state == TPACPI_RFK_RADIO_ON)
3845                 status = TP_ACPI_WANCARD_RADIOSSW;
3846         else
3847                 status = 0;
3848
3849         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3850                 return -EIO;
3851
3852         return 0;
3853 }
3854
3855 /* sysfs wan enable ---------------------------------------------------- */
3856 static ssize_t wan_enable_show(struct device *dev,
3857                            struct device_attribute *attr,
3858                            char *buf)
3859 {
3860         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3861                         attr, buf);
3862 }
3863
3864 static ssize_t wan_enable_store(struct device *dev,
3865                             struct device_attribute *attr,
3866                             const char *buf, size_t count)
3867 {
3868         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3869                         attr, buf, count);
3870 }
3871
3872 static struct device_attribute dev_attr_wan_enable =
3873         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3874                 wan_enable_show, wan_enable_store);
3875
3876 /* --------------------------------------------------------------------- */
3877
3878 static struct attribute *wan_attributes[] = {
3879         &dev_attr_wan_enable.attr,
3880         NULL
3881 };
3882
3883 static const struct attribute_group wan_attr_group = {
3884         .attrs = wan_attributes,
3885 };
3886
3887 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3888         .get_status = wan_get_status,
3889         .set_status = wan_set_status,
3890 };
3891
3892 static void wan_shutdown(void)
3893 {
3894         /* Order firmware to save current state to NVRAM */
3895         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3896                         TP_ACPI_WGSV_SAVE_STATE))
3897                 printk(TPACPI_NOTICE
3898                         "failed to save WWAN state to NVRAM\n");
3899         else
3900                 vdbg_printk(TPACPI_DBG_RFKILL,
3901                         "WWAN state saved to NVRAM\n");
3902 }
3903
3904 static void wan_exit(void)
3905 {
3906         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3907                 &wan_attr_group);
3908
3909         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3910
3911         wan_shutdown();
3912 }
3913
3914 static int __init wan_init(struct ibm_init_struct *iibm)
3915 {
3916         int res;
3917         int status = 0;
3918
3919         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3920                         "initializing wan subdriver\n");
3921
3922         TPACPI_ACPIHANDLE_INIT(hkey);
3923
3924         tp_features.wan = hkey_handle &&
3925             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3926
3927         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3928                 "wan is %s, status 0x%02x\n",
3929                 str_supported(tp_features.wan),
3930                 status);
3931
3932 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3933         if (dbg_wwanemul) {
3934                 tp_features.wan = 1;
3935                 printk(TPACPI_INFO
3936                         "wwan switch emulation enabled\n");
3937         } else
3938 #endif
3939         if (tp_features.wan &&
3940             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3941                 /* no wan hardware present in system */
3942                 tp_features.wan = 0;
3943                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3944                            "wan hardware not installed\n");
3945         }
3946
3947         if (!tp_features.wan)
3948                 return 1;
3949
3950         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3951                                 &wan_tprfk_ops,
3952                                 RFKILL_TYPE_WWAN,
3953                                 TPACPI_RFK_WWAN_SW_NAME,
3954                                 true);
3955         if (res)
3956                 return res;
3957
3958         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3959                                 &wan_attr_group);
3960
3961         if (res) {
3962                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3963                 return res;
3964         }
3965
3966         return 0;
3967 }
3968
3969 /* procfs -------------------------------------------------------------- */
3970 static int wan_read(char *p)
3971 {
3972         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
3973 }
3974
3975 static int wan_write(char *buf)
3976 {
3977         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
3978 }
3979
3980 static struct ibm_struct wan_driver_data = {
3981         .name = "wan",
3982         .read = wan_read,
3983         .write = wan_write,
3984         .exit = wan_exit,
3985         .suspend = wan_suspend,
3986         .shutdown = wan_shutdown,
3987 };
3988
3989 /*************************************************************************
3990  * UWB subdriver
3991  */
3992
3993 enum {
3994         /* ACPI GUWB/SUWB bits */
3995         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3996         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3997 };
3998
3999 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
4000
4001 static int uwb_get_status(void)
4002 {
4003         int status;
4004
4005 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4006         if (dbg_uwbemul)
4007                 return (tpacpi_uwb_emulstate) ?
4008                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4009 #endif
4010
4011         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4012                 return -EIO;
4013
4014         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4015                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4016 }
4017
4018 static int uwb_set_status(enum tpacpi_rfkill_state state)
4019 {
4020         int status;
4021
4022         vdbg_printk(TPACPI_DBG_RFKILL,
4023                 "will attempt to %s UWB\n",
4024                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
4025
4026 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4027         if (dbg_uwbemul) {
4028                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4029                 return 0;
4030         }
4031 #endif
4032
4033         if (state == TPACPI_RFK_RADIO_ON)
4034                 status = TP_ACPI_UWB_RADIOSSW;
4035         else
4036                 status = 0;
4037
4038         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4039                 return -EIO;
4040
4041         return 0;
4042 }
4043
4044 /* --------------------------------------------------------------------- */
4045
4046 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4047         .get_status = uwb_get_status,
4048         .set_status = uwb_set_status,
4049 };
4050
4051 static void uwb_exit(void)
4052 {
4053         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4054 }
4055
4056 static int __init uwb_init(struct ibm_init_struct *iibm)
4057 {
4058         int res;
4059         int status = 0;
4060
4061         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4062                         "initializing uwb subdriver\n");
4063
4064         TPACPI_ACPIHANDLE_INIT(hkey);
4065
4066         tp_features.uwb = hkey_handle &&
4067             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4068
4069         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4070                 "uwb is %s, status 0x%02x\n",
4071                 str_supported(tp_features.uwb),
4072                 status);
4073
4074 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4075         if (dbg_uwbemul) {
4076                 tp_features.uwb = 1;
4077                 printk(TPACPI_INFO
4078                         "uwb switch emulation enabled\n");
4079         } else
4080 #endif
4081         if (tp_features.uwb &&
4082             !(status & TP_ACPI_UWB_HWPRESENT)) {
4083                 /* no uwb hardware present in system */
4084                 tp_features.uwb = 0;
4085                 dbg_printk(TPACPI_DBG_INIT,
4086                            "uwb hardware not installed\n");
4087         }
4088
4089         if (!tp_features.uwb)
4090                 return 1;
4091
4092         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4093                                 &uwb_tprfk_ops,
4094                                 RFKILL_TYPE_UWB,
4095                                 TPACPI_RFK_UWB_SW_NAME,
4096                                 false);
4097         return res;
4098 }
4099
4100 static struct ibm_struct uwb_driver_data = {
4101         .name = "uwb",
4102         .exit = uwb_exit,
4103         .flags.experimental = 1,
4104 };
4105
4106 /*************************************************************************
4107  * Video subdriver
4108  */
4109
4110 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4111
4112 enum video_access_mode {
4113         TPACPI_VIDEO_NONE = 0,
4114         TPACPI_VIDEO_570,       /* 570 */
4115         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
4116         TPACPI_VIDEO_NEW,       /* all others */
4117 };
4118
4119 enum {  /* video status flags, based on VIDEO_570 */
4120         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
4121         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
4122         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
4123 };
4124
4125 enum {  /* TPACPI_VIDEO_570 constants */
4126         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
4127         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
4128                                                  * video_status_flags */
4129         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
4130         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
4131 };
4132
4133 static enum video_access_mode video_supported;
4134 static int video_orig_autosw;
4135
4136 static int video_autosw_get(void);
4137 static int video_autosw_set(int enable);
4138
4139 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
4140
4141 static int __init video_init(struct ibm_init_struct *iibm)
4142 {
4143         int ivga;
4144
4145         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4146
4147         TPACPI_ACPIHANDLE_INIT(vid);
4148         TPACPI_ACPIHANDLE_INIT(vid2);
4149
4150         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4151                 /* G41, assume IVGA doesn't change */
4152                 vid_handle = vid2_handle;
4153
4154         if (!vid_handle)
4155                 /* video switching not supported on R30, R31 */
4156                 video_supported = TPACPI_VIDEO_NONE;
4157         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4158                 /* 570 */
4159                 video_supported = TPACPI_VIDEO_570;
4160         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4161                 /* 600e/x, 770e, 770x */
4162                 video_supported = TPACPI_VIDEO_770;
4163         else
4164                 /* all others */
4165                 video_supported = TPACPI_VIDEO_NEW;
4166
4167         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4168                 str_supported(video_supported != TPACPI_VIDEO_NONE),
4169                 video_supported);
4170
4171         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
4172 }
4173
4174 static void video_exit(void)
4175 {
4176         dbg_printk(TPACPI_DBG_EXIT,
4177                    "restoring original video autoswitch mode\n");
4178         if (video_autosw_set(video_orig_autosw))
4179                 printk(TPACPI_ERR "error while trying to restore original "
4180                         "video autoswitch mode\n");
4181 }
4182
4183 static int video_outputsw_get(void)
4184 {
4185         int status = 0;
4186         int i;
4187
4188         switch (video_supported) {
4189         case TPACPI_VIDEO_570:
4190                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4191                                  TP_ACPI_VIDEO_570_PHSCMD))
4192                         return -EIO;
4193                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4194                 break;
4195         case TPACPI_VIDEO_770:
4196                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4197                         return -EIO;
4198                 if (i)
4199                         status |= TP_ACPI_VIDEO_S_LCD;
4200                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4201                         return -EIO;
4202                 if (i)
4203                         status |= TP_ACPI_VIDEO_S_CRT;
4204                 break;
4205         case TPACPI_VIDEO_NEW:
4206                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4207                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4208                         return -EIO;
4209                 if (i)
4210                         status |= TP_ACPI_VIDEO_S_CRT;
4211
4212                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4213                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4214                         return -EIO;
4215                 if (i)
4216                         status |= TP_ACPI_VIDEO_S_LCD;
4217                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4218                         return -EIO;
4219                 if (i)
4220                         status |= TP_ACPI_VIDEO_S_DVI;
4221                 break;
4222         default:
4223                 return -ENOSYS;
4224         }
4225
4226         return status;
4227 }
4228
4229 static int video_outputsw_set(int status)
4230 {
4231         int autosw;
4232         int res = 0;
4233
4234         switch (video_supported) {
4235         case TPACPI_VIDEO_570:
4236                 res = acpi_evalf(NULL, NULL,
4237                                  "\\_SB.PHS2", "vdd",
4238                                  TP_ACPI_VIDEO_570_PHS2CMD,
4239                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4240                 break;
4241         case TPACPI_VIDEO_770:
4242                 autosw = video_autosw_get();
4243                 if (autosw < 0)
4244                         return autosw;
4245
4246                 res = video_autosw_set(1);
4247                 if (res)
4248                         return res;
4249                 res = acpi_evalf(vid_handle, NULL,
4250                                  "ASWT", "vdd", status * 0x100, 0);
4251                 if (!autosw && video_autosw_set(autosw)) {
4252                         printk(TPACPI_ERR
4253                                "video auto-switch left enabled due to error\n");
4254                         return -EIO;
4255                 }
4256                 break;
4257         case TPACPI_VIDEO_NEW:
4258                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4259                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4260                 break;
4261         default:
4262                 return -ENOSYS;
4263         }
4264
4265         return (res)? 0 : -EIO;
4266 }
4267
4268 static int video_autosw_get(void)
4269 {
4270         int autosw = 0;
4271
4272         switch (video_supported) {
4273         case TPACPI_VIDEO_570:
4274                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4275                         return -EIO;
4276                 break;
4277         case TPACPI_VIDEO_770:
4278         case TPACPI_VIDEO_NEW:
4279                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4280                         return -EIO;
4281                 break;
4282         default:
4283                 return -ENOSYS;
4284         }
4285
4286         return autosw & 1;
4287 }
4288
4289 static int video_autosw_set(int enable)
4290 {
4291         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4292                 return -EIO;
4293         return 0;
4294 }
4295
4296 static int video_outputsw_cycle(void)
4297 {
4298         int autosw = video_autosw_get();
4299         int res;
4300
4301         if (autosw < 0)
4302                 return autosw;
4303
4304         switch (video_supported) {
4305         case TPACPI_VIDEO_570:
4306                 res = video_autosw_set(1);
4307                 if (res)
4308                         return res;
4309                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4310                 break;
4311         case TPACPI_VIDEO_770:
4312         case TPACPI_VIDEO_NEW:
4313                 res = video_autosw_set(1);
4314                 if (res)
4315                         return res;
4316                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4317                 break;
4318         default:
4319                 return -ENOSYS;
4320         }
4321         if (!autosw && video_autosw_set(autosw)) {
4322                 printk(TPACPI_ERR
4323                        "video auto-switch left enabled due to error\n");
4324                 return -EIO;
4325         }
4326
4327         return (res)? 0 : -EIO;
4328 }
4329
4330 static int video_expand_toggle(void)
4331 {
4332         switch (video_supported) {
4333         case TPACPI_VIDEO_570:
4334                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4335                         0 : -EIO;
4336         case TPACPI_VIDEO_770:
4337                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4338                         0 : -EIO;
4339         case TPACPI_VIDEO_NEW:
4340                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4341                         0 : -EIO;
4342         default:
4343                 return -ENOSYS;
4344         }
4345         /* not reached */
4346 }
4347
4348 static int video_read(char *p)
4349 {
4350         int status, autosw;
4351         int len = 0;
4352
4353         if (video_supported == TPACPI_VIDEO_NONE) {
4354                 len += sprintf(p + len, "status:\t\tnot supported\n");
4355                 return len;
4356         }
4357
4358         status = video_outputsw_get();
4359         if (status < 0)
4360                 return status;
4361
4362         autosw = video_autosw_get();
4363         if (autosw < 0)
4364                 return autosw;
4365
4366         len += sprintf(p + len, "status:\t\tsupported\n");
4367         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4368         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4369         if (video_supported == TPACPI_VIDEO_NEW)
4370                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4371         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4372         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4373         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4374         if (video_supported == TPACPI_VIDEO_NEW)
4375                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4376         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4377         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4378
4379         return len;
4380 }
4381
4382 static int video_write(char *buf)
4383 {
4384         char *cmd;
4385         int enable, disable, status;
4386         int res;
4387
4388         if (video_supported == TPACPI_VIDEO_NONE)
4389                 return -ENODEV;
4390
4391         enable = 0;
4392         disable = 0;
4393
4394         while ((cmd = next_cmd(&buf))) {
4395                 if (strlencmp(cmd, "lcd_enable") == 0) {
4396                         enable |= TP_ACPI_VIDEO_S_LCD;
4397                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4398                         disable |= TP_ACPI_VIDEO_S_LCD;
4399                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4400                         enable |= TP_ACPI_VIDEO_S_CRT;
4401                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4402                         disable |= TP_ACPI_VIDEO_S_CRT;
4403                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4404                            strlencmp(cmd, "dvi_enable") == 0) {
4405                         enable |= TP_ACPI_VIDEO_S_DVI;
4406                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4407                            strlencmp(cmd, "dvi_disable") == 0) {
4408                         disable |= TP_ACPI_VIDEO_S_DVI;
4409                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4410                         res = video_autosw_set(1);
4411                         if (res)
4412                                 return res;
4413                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4414                         res = video_autosw_set(0);
4415                         if (res)
4416                                 return res;
4417                 } else if (strlencmp(cmd, "video_switch") == 0) {
4418                         res = video_outputsw_cycle();
4419                         if (res)
4420                                 return res;
4421                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4422                         res = video_expand_toggle();
4423                         if (res)
4424                                 return res;
4425                 } else
4426                         return -EINVAL;
4427         }
4428
4429         if (enable || disable) {
4430                 status = video_outputsw_get();
4431                 if (status < 0)
4432                         return status;
4433                 res = video_outputsw_set((status & ~disable) | enable);
4434                 if (res)
4435                         return res;
4436         }
4437
4438         return 0;
4439 }
4440
4441 static struct ibm_struct video_driver_data = {
4442         .name = "video",
4443         .read = video_read,
4444         .write = video_write,
4445         .exit = video_exit,
4446 };
4447
4448 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4449
4450 /*************************************************************************
4451  * Light (thinklight) subdriver
4452  */
4453
4454 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4455 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4456
4457 static int light_get_status(void)
4458 {
4459         int status = 0;
4460
4461         if (tp_features.light_status) {
4462                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4463                         return -EIO;
4464                 return (!!status);
4465         }
4466
4467         return -ENXIO;
4468 }
4469
4470 static int light_set_status(int status)
4471 {
4472         int rc;
4473
4474         if (tp_features.light) {
4475                 if (cmos_handle) {
4476                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4477                                         (status)?
4478                                                 TP_CMOS_THINKLIGHT_ON :
4479                                                 TP_CMOS_THINKLIGHT_OFF);
4480                 } else {
4481                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4482                                         (status)? 1 : 0);
4483                 }
4484                 return (rc)? 0 : -EIO;
4485         }
4486
4487         return -ENXIO;
4488 }
4489
4490 static void light_set_status_worker(struct work_struct *work)
4491 {
4492         struct tpacpi_led_classdev *data =
4493                         container_of(work, struct tpacpi_led_classdev, work);
4494
4495         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4496                 light_set_status((data->new_state != TPACPI_LED_OFF));
4497 }
4498
4499 static void light_sysfs_set(struct led_classdev *led_cdev,
4500                         enum led_brightness brightness)
4501 {
4502         struct tpacpi_led_classdev *data =
4503                 container_of(led_cdev,
4504                              struct tpacpi_led_classdev,
4505                              led_classdev);
4506         data->new_state = (brightness != LED_OFF) ?
4507                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4508         queue_work(tpacpi_wq, &data->work);
4509 }
4510
4511 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4512 {
4513         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4514 }
4515
4516 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4517         .led_classdev = {
4518                 .name           = "tpacpi::thinklight",
4519                 .brightness_set = &light_sysfs_set,
4520                 .brightness_get = &light_sysfs_get,
4521         }
4522 };
4523
4524 static int __init light_init(struct ibm_init_struct *iibm)
4525 {
4526         int rc;
4527
4528         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4529
4530         TPACPI_ACPIHANDLE_INIT(ledb);
4531         TPACPI_ACPIHANDLE_INIT(lght);
4532         TPACPI_ACPIHANDLE_INIT(cmos);
4533         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4534
4535         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4536         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4537
4538         if (tp_features.light)
4539                 /* light status not supported on
4540                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4541                 tp_features.light_status =
4542                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4543
4544         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4545                 str_supported(tp_features.light),
4546                 str_supported(tp_features.light_status));
4547
4548         if (!tp_features.light)
4549                 return 1;
4550
4551         rc = led_classdev_register(&tpacpi_pdev->dev,
4552                                    &tpacpi_led_thinklight.led_classdev);
4553
4554         if (rc < 0) {
4555                 tp_features.light = 0;
4556                 tp_features.light_status = 0;
4557         } else  {
4558                 rc = 0;
4559         }
4560
4561         return rc;
4562 }
4563
4564 static void light_exit(void)
4565 {
4566         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4567         if (work_pending(&tpacpi_led_thinklight.work))
4568                 flush_workqueue(tpacpi_wq);
4569 }
4570
4571 static int light_read(char *p)
4572 {
4573         int len = 0;
4574         int status;
4575
4576         if (!tp_features.light) {
4577                 len += sprintf(p + len, "status:\t\tnot supported\n");
4578         } else if (!tp_features.light_status) {
4579                 len += sprintf(p + len, "status:\t\tunknown\n");
4580                 len += sprintf(p + len, "commands:\ton, off\n");
4581         } else {
4582                 status = light_get_status();
4583                 if (status < 0)
4584                         return status;
4585                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4586                 len += sprintf(p + len, "commands:\ton, off\n");
4587         }
4588
4589         return len;
4590 }
4591
4592 static int light_write(char *buf)
4593 {
4594         char *cmd;
4595         int newstatus = 0;
4596
4597         if (!tp_features.light)
4598                 return -ENODEV;
4599
4600         while ((cmd = next_cmd(&buf))) {
4601                 if (strlencmp(cmd, "on") == 0) {
4602                         newstatus = 1;
4603                 } else if (strlencmp(cmd, "off") == 0) {
4604                         newstatus = 0;
4605                 } else
4606                         return -EINVAL;
4607         }
4608
4609         return light_set_status(newstatus);
4610 }
4611
4612 static struct ibm_struct light_driver_data = {
4613         .name = "light",
4614         .read = light_read,
4615         .write = light_write,
4616         .exit = light_exit,
4617 };
4618
4619 /*************************************************************************
4620  * CMOS subdriver
4621  */
4622
4623 /* sysfs cmos_command -------------------------------------------------- */
4624 static ssize_t cmos_command_store(struct device *dev,
4625                             struct device_attribute *attr,
4626                             const char *buf, size_t count)
4627 {
4628         unsigned long cmos_cmd;
4629         int res;
4630
4631         if (parse_strtoul(buf, 21, &cmos_cmd))
4632                 return -EINVAL;
4633
4634         res = issue_thinkpad_cmos_command(cmos_cmd);
4635         return (res)? res : count;
4636 }
4637
4638 static struct device_attribute dev_attr_cmos_command =
4639         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4640
4641 /* --------------------------------------------------------------------- */
4642
4643 static int __init cmos_init(struct ibm_init_struct *iibm)
4644 {
4645         int res;
4646
4647         vdbg_printk(TPACPI_DBG_INIT,
4648                 "initializing cmos commands subdriver\n");
4649
4650         TPACPI_ACPIHANDLE_INIT(cmos);
4651
4652         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4653                 str_supported(cmos_handle != NULL));
4654
4655         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4656         if (res)
4657                 return res;
4658
4659         return (cmos_handle)? 0 : 1;
4660 }
4661
4662 static void cmos_exit(void)
4663 {
4664         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4665 }
4666
4667 static int cmos_read(char *p)
4668 {
4669         int len = 0;
4670
4671         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4672            R30, R31, T20-22, X20-21 */
4673         if (!cmos_handle)
4674                 len += sprintf(p + len, "status:\t\tnot supported\n");
4675         else {
4676                 len += sprintf(p + len, "status:\t\tsupported\n");
4677                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4678         }
4679
4680         return len;
4681 }
4682
4683 static int cmos_write(char *buf)
4684 {
4685         char *cmd;
4686         int cmos_cmd, res;
4687
4688         while ((cmd = next_cmd(&buf))) {
4689                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4690                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4691                         /* cmos_cmd set */
4692                 } else
4693                         return -EINVAL;
4694
4695                 res = issue_thinkpad_cmos_command(cmos_cmd);
4696                 if (res)
4697                         return res;
4698         }
4699
4700         return 0;
4701 }
4702
4703 static struct ibm_struct cmos_driver_data = {
4704         .name = "cmos",
4705         .read = cmos_read,
4706         .write = cmos_write,
4707         .exit = cmos_exit,
4708 };
4709
4710 /*************************************************************************
4711  * LED subdriver
4712  */
4713
4714 enum led_access_mode {
4715         TPACPI_LED_NONE = 0,
4716         TPACPI_LED_570, /* 570 */
4717         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4718         TPACPI_LED_NEW, /* all others */
4719 };
4720
4721 enum {  /* For TPACPI_LED_OLD */
4722         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4723         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4724         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4725 };
4726
4727 static enum led_access_mode led_supported;
4728
4729 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4730            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4731                                 /* T20-22, X20-21 */
4732            "LED",               /* all others */
4733            );                   /* R30, R31 */
4734
4735 #define TPACPI_LED_NUMLEDS 16
4736 static struct tpacpi_led_classdev *tpacpi_leds;
4737 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4738 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4739         /* there's a limit of 19 chars + NULL before 2.6.26 */
4740         "tpacpi::power",
4741         "tpacpi:orange:batt",
4742         "tpacpi:green:batt",
4743         "tpacpi::dock_active",
4744         "tpacpi::bay_active",
4745         "tpacpi::dock_batt",
4746         "tpacpi::unknown_led",
4747         "tpacpi::standby",
4748         "tpacpi::dock_status1",
4749         "tpacpi::dock_status2",
4750         "tpacpi::unknown_led2",
4751         "tpacpi::unknown_led3",
4752         "tpacpi::thinkvantage",
4753 };
4754 #define TPACPI_SAFE_LEDS        0x1081U
4755
4756 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4757 {
4758 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4759         return false;
4760 #else
4761         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4762 #endif
4763 }
4764
4765 static int led_get_status(const unsigned int led)
4766 {
4767         int status;
4768         enum led_status_t led_s;
4769
4770         switch (led_supported) {
4771         case TPACPI_LED_570:
4772                 if (!acpi_evalf(ec_handle,
4773                                 &status, "GLED", "dd", 1 << led))
4774                         return -EIO;
4775                 led_s = (status == 0)?
4776                                 TPACPI_LED_OFF :
4777                                 ((status == 1)?
4778                                         TPACPI_LED_ON :
4779                                         TPACPI_LED_BLINK);
4780                 tpacpi_led_state_cache[led] = led_s;
4781                 return led_s;
4782         default:
4783                 return -ENXIO;
4784         }
4785
4786         /* not reached */
4787 }
4788
4789 static int led_set_status(const unsigned int led,
4790                           const enum led_status_t ledstatus)
4791 {
4792         /* off, on, blink. Index is led_status_t */
4793         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4794         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4795
4796         int rc = 0;
4797
4798         switch (led_supported) {
4799         case TPACPI_LED_570:
4800                 /* 570 */
4801                 if (unlikely(led > 7))
4802                         return -EINVAL;
4803                 if (unlikely(tpacpi_is_led_restricted(led)))
4804                         return -EPERM;
4805                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4806                                 (1 << led), led_sled_arg1[ledstatus]))
4807                         rc = -EIO;
4808                 break;
4809         case TPACPI_LED_OLD:
4810                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4811                 if (unlikely(led > 7))
4812                         return -EINVAL;
4813                 if (unlikely(tpacpi_is_led_restricted(led)))
4814                         return -EPERM;
4815                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4816                 if (rc >= 0)
4817                         rc = ec_write(TPACPI_LED_EC_HLBL,
4818                                       (ledstatus == TPACPI_LED_BLINK) << led);
4819                 if (rc >= 0)
4820                         rc = ec_write(TPACPI_LED_EC_HLCL,
4821                                       (ledstatus != TPACPI_LED_OFF) << led);
4822                 break;
4823         case TPACPI_LED_NEW:
4824                 /* all others */
4825                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4826                         return -EINVAL;
4827                 if (unlikely(tpacpi_is_led_restricted(led)))
4828                         return -EPERM;
4829                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4830                                 led, led_led_arg1[ledstatus]))
4831                         rc = -EIO;
4832                 break;
4833         default:
4834                 rc = -ENXIO;
4835         }
4836
4837         if (!rc)
4838                 tpacpi_led_state_cache[led] = ledstatus;
4839
4840         return rc;
4841 }
4842
4843 static void led_set_status_worker(struct work_struct *work)
4844 {
4845         struct tpacpi_led_classdev *data =
4846                 container_of(work, struct tpacpi_led_classdev, work);
4847
4848         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4849                 led_set_status(data->led, data->new_state);
4850 }
4851
4852 static void led_sysfs_set(struct led_classdev *led_cdev,
4853                         enum led_brightness brightness)
4854 {
4855         struct tpacpi_led_classdev *data = container_of(led_cdev,
4856                              struct tpacpi_led_classdev, led_classdev);
4857
4858         if (brightness == LED_OFF)
4859                 data->new_state = TPACPI_LED_OFF;
4860         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4861                 data->new_state = TPACPI_LED_ON;
4862         else
4863                 data->new_state = TPACPI_LED_BLINK;
4864
4865         queue_work(tpacpi_wq, &data->work);
4866 }
4867
4868 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4869                         unsigned long *delay_on, unsigned long *delay_off)
4870 {
4871         struct tpacpi_led_classdev *data = container_of(led_cdev,
4872                              struct tpacpi_led_classdev, led_classdev);
4873
4874         /* Can we choose the flash rate? */
4875         if (*delay_on == 0 && *delay_off == 0) {
4876                 /* yes. set them to the hardware blink rate (1 Hz) */
4877                 *delay_on = 500; /* ms */
4878                 *delay_off = 500; /* ms */
4879         } else if ((*delay_on != 500) || (*delay_off != 500))
4880                 return -EINVAL;
4881
4882         data->new_state = TPACPI_LED_BLINK;
4883         queue_work(tpacpi_wq, &data->work);
4884
4885         return 0;
4886 }
4887
4888 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4889 {
4890         int rc;
4891
4892         struct tpacpi_led_classdev *data = container_of(led_cdev,
4893                              struct tpacpi_led_classdev, led_classdev);
4894
4895         rc = led_get_status(data->led);
4896
4897         if (rc == TPACPI_LED_OFF || rc < 0)
4898                 rc = LED_OFF;   /* no error handling in led class :( */
4899         else
4900                 rc = LED_FULL;
4901
4902         return rc;
4903 }
4904
4905 static void led_exit(void)
4906 {
4907         unsigned int i;
4908
4909         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4910                 if (tpacpi_leds[i].led_classdev.name)
4911                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4912         }
4913
4914         kfree(tpacpi_leds);
4915 }
4916
4917 static int __init tpacpi_init_led(unsigned int led)
4918 {
4919         int rc;
4920
4921         tpacpi_leds[led].led = led;
4922
4923         /* LEDs with no name don't get registered */
4924         if (!tpacpi_led_names[led])
4925                 return 0;
4926
4927         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4928         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4929         if (led_supported == TPACPI_LED_570)
4930                 tpacpi_leds[led].led_classdev.brightness_get =
4931                                                 &led_sysfs_get;
4932
4933         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4934
4935         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4936
4937         rc = led_classdev_register(&tpacpi_pdev->dev,
4938                                 &tpacpi_leds[led].led_classdev);
4939         if (rc < 0)
4940                 tpacpi_leds[led].led_classdev.name = NULL;
4941
4942         return rc;
4943 }
4944
4945 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4946         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4947         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4948         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
4949
4950         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
4951         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
4952         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
4953         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
4954         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
4955         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
4956         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
4957         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
4958
4959         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
4960         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
4961         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
4962         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
4963         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
4964
4965         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
4966         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
4967         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
4968         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
4969
4970         /* (1) - may have excess leds enabled on MSB */
4971
4972         /* Defaults (order matters, keep last, don't reorder!) */
4973         { /* Lenovo */
4974           .vendor = PCI_VENDOR_ID_LENOVO,
4975           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4976           .quirks = 0x1fffU,
4977         },
4978         { /* IBM ThinkPads with no EC version string */
4979           .vendor = PCI_VENDOR_ID_IBM,
4980           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
4981           .quirks = 0x00ffU,
4982         },
4983         { /* IBM ThinkPads with EC version string */
4984           .vendor = PCI_VENDOR_ID_IBM,
4985           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4986           .quirks = 0x00bfU,
4987         },
4988 };
4989
4990 #undef TPACPI_LEDQ_IBM
4991 #undef TPACPI_LEDQ_LNV
4992
4993 static int __init led_init(struct ibm_init_struct *iibm)
4994 {
4995         unsigned int i;
4996         int rc;
4997         unsigned long useful_leds;
4998
4999         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5000
5001         TPACPI_ACPIHANDLE_INIT(led);
5002
5003         if (!led_handle)
5004                 /* led not supported on R30, R31 */
5005                 led_supported = TPACPI_LED_NONE;
5006         else if (strlencmp(led_path, "SLED") == 0)
5007                 /* 570 */
5008                 led_supported = TPACPI_LED_570;
5009         else if (strlencmp(led_path, "SYSL") == 0)
5010                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5011                 led_supported = TPACPI_LED_OLD;
5012         else
5013                 /* all others */
5014                 led_supported = TPACPI_LED_NEW;
5015
5016         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5017                 str_supported(led_supported), led_supported);
5018
5019         if (led_supported == TPACPI_LED_NONE)
5020                 return 1;
5021
5022         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5023                               GFP_KERNEL);
5024         if (!tpacpi_leds) {
5025                 printk(TPACPI_ERR "Out of memory for LED data\n");
5026                 return -ENOMEM;
5027         }
5028
5029         useful_leds = tpacpi_check_quirks(led_useful_qtable,
5030                                           ARRAY_SIZE(led_useful_qtable));
5031
5032         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5033                 if (!tpacpi_is_led_restricted(i) &&
5034                     test_bit(i, &useful_leds)) {
5035                         rc = tpacpi_init_led(i);
5036                         if (rc < 0) {
5037                                 led_exit();
5038                                 return rc;
5039                         }
5040                 }
5041         }
5042
5043 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5044         printk(TPACPI_NOTICE
5045                 "warning: userspace override of important "
5046                 "firmware LEDs is enabled\n");
5047 #endif
5048         return 0;
5049 }
5050
5051 #define str_led_status(s) \
5052         ((s) == TPACPI_LED_OFF ? "off" : \
5053                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5054
5055 static int led_read(char *p)
5056 {
5057         int len = 0;
5058
5059         if (!led_supported) {
5060                 len += sprintf(p + len, "status:\t\tnot supported\n");
5061                 return len;
5062         }
5063         len += sprintf(p + len, "status:\t\tsupported\n");
5064
5065         if (led_supported == TPACPI_LED_570) {
5066                 /* 570 */
5067                 int i, status;
5068                 for (i = 0; i < 8; i++) {
5069                         status = led_get_status(i);
5070                         if (status < 0)
5071                                 return -EIO;
5072                         len += sprintf(p + len, "%d:\t\t%s\n",
5073                                        i, str_led_status(status));
5074                 }
5075         }
5076
5077         len += sprintf(p + len, "commands:\t"
5078                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5079
5080         return len;
5081 }
5082
5083 static int led_write(char *buf)
5084 {
5085         char *cmd;
5086         int led, rc;
5087         enum led_status_t s;
5088
5089         if (!led_supported)
5090                 return -ENODEV;
5091
5092         while ((cmd = next_cmd(&buf))) {
5093                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
5094                         return -EINVAL;
5095
5096                 if (strstr(cmd, "off")) {
5097                         s = TPACPI_LED_OFF;
5098                 } else if (strstr(cmd, "on")) {
5099                         s = TPACPI_LED_ON;
5100                 } else if (strstr(cmd, "blink")) {
5101                         s = TPACPI_LED_BLINK;
5102                 } else {
5103                         return -EINVAL;
5104                 }
5105
5106                 rc = led_set_status(led, s);
5107                 if (rc < 0)
5108                         return rc;
5109         }
5110
5111         return 0;
5112 }
5113
5114 static struct ibm_struct led_driver_data = {
5115         .name = "led",
5116         .read = led_read,
5117         .write = led_write,
5118         .exit = led_exit,
5119 };
5120
5121 /*************************************************************************
5122  * Beep subdriver
5123  */
5124
5125 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5126
5127 #define TPACPI_BEEP_Q1 0x0001
5128
5129 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5130         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5131         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5132 };
5133
5134 static int __init beep_init(struct ibm_init_struct *iibm)
5135 {
5136         unsigned long quirks;
5137
5138         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5139
5140         TPACPI_ACPIHANDLE_INIT(beep);
5141
5142         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5143                 str_supported(beep_handle != NULL));
5144
5145         quirks = tpacpi_check_quirks(beep_quirk_table,
5146                                      ARRAY_SIZE(beep_quirk_table));
5147
5148         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5149
5150         return (beep_handle)? 0 : 1;
5151 }
5152
5153 static int beep_read(char *p)
5154 {
5155         int len = 0;
5156
5157         if (!beep_handle)
5158                 len += sprintf(p + len, "status:\t\tnot supported\n");
5159         else {
5160                 len += sprintf(p + len, "status:\t\tsupported\n");
5161                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5162         }
5163
5164         return len;
5165 }
5166
5167 static int beep_write(char *buf)
5168 {
5169         char *cmd;
5170         int beep_cmd;
5171
5172         if (!beep_handle)
5173                 return -ENODEV;
5174
5175         while ((cmd = next_cmd(&buf))) {
5176                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5177                     beep_cmd >= 0 && beep_cmd <= 17) {
5178                         /* beep_cmd set */
5179                 } else
5180                         return -EINVAL;
5181                 if (tp_features.beep_needs_two_args) {
5182                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5183                                         beep_cmd, 0))
5184                                 return -EIO;
5185                 } else {
5186                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5187                                         beep_cmd))
5188                                 return -EIO;
5189                 }
5190         }
5191
5192         return 0;
5193 }
5194
5195 static struct ibm_struct beep_driver_data = {
5196         .name = "beep",
5197         .read = beep_read,
5198         .write = beep_write,
5199 };
5200
5201 /*************************************************************************
5202  * Thermal subdriver
5203  */
5204
5205 enum thermal_access_mode {
5206         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5207         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5208         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5209         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5210         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5211 };
5212
5213 enum { /* TPACPI_THERMAL_TPEC_* */
5214         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5215         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5216         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5217 };
5218
5219 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5220 struct ibm_thermal_sensors_struct {
5221         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5222 };
5223
5224 static enum thermal_access_mode thermal_read_mode;
5225
5226 /* idx is zero-based */
5227 static int thermal_get_sensor(int idx, s32 *value)
5228 {
5229         int t;
5230         s8 tmp;
5231         char tmpi[5];
5232
5233         t = TP_EC_THERMAL_TMP0;
5234
5235         switch (thermal_read_mode) {
5236 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5237         case TPACPI_THERMAL_TPEC_16:
5238                 if (idx >= 8 && idx <= 15) {
5239                         t = TP_EC_THERMAL_TMP8;
5240                         idx -= 8;
5241                 }
5242                 /* fallthrough */
5243 #endif
5244         case TPACPI_THERMAL_TPEC_8:
5245                 if (idx <= 7) {
5246                         if (!acpi_ec_read(t + idx, &tmp))
5247                                 return -EIO;
5248                         *value = tmp * 1000;
5249                         return 0;
5250                 }
5251                 break;
5252
5253         case TPACPI_THERMAL_ACPI_UPDT:
5254                 if (idx <= 7) {
5255                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5256                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5257                                 return -EIO;
5258                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5259                                 return -EIO;
5260                         *value = (t - 2732) * 100;
5261                         return 0;
5262                 }
5263                 break;
5264
5265         case TPACPI_THERMAL_ACPI_TMP07:
5266                 if (idx <= 7) {
5267                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5268                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5269                                 return -EIO;
5270                         if (t > 127 || t < -127)
5271                                 t = TP_EC_THERMAL_TMP_NA;
5272                         *value = t * 1000;
5273                         return 0;
5274                 }
5275                 break;
5276
5277         case TPACPI_THERMAL_NONE:
5278         default:
5279                 return -ENOSYS;
5280         }
5281
5282         return -EINVAL;
5283 }
5284
5285 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5286 {
5287         int res, i;
5288         int n;
5289
5290         n = 8;
5291         i = 0;
5292
5293         if (!s)
5294                 return -EINVAL;
5295
5296         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5297                 n = 16;
5298
5299         for (i = 0 ; i < n; i++) {
5300                 res = thermal_get_sensor(i, &s->temp[i]);
5301                 if (res)
5302                         return res;
5303         }
5304
5305         return n;
5306 }
5307
5308 /* sysfs temp##_input -------------------------------------------------- */
5309
5310 static ssize_t thermal_temp_input_show(struct device *dev,
5311                            struct device_attribute *attr,
5312                            char *buf)
5313 {
5314         struct sensor_device_attribute *sensor_attr =
5315                                         to_sensor_dev_attr(attr);
5316         int idx = sensor_attr->index;
5317         s32 value;
5318         int res;
5319
5320         res = thermal_get_sensor(idx, &value);
5321         if (res)
5322                 return res;
5323         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5324                 return -ENXIO;
5325
5326         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5327 }
5328
5329 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5330          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5331                      thermal_temp_input_show, NULL, _idxB)
5332
5333 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5334         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5335         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5336         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5337         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5338         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5339         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5340         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5341         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5342         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5343         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5344         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5345         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5346         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5347         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5348         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5349         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5350 };
5351
5352 #define THERMAL_ATTRS(X) \
5353         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5354
5355 static struct attribute *thermal_temp_input_attr[] = {
5356         THERMAL_ATTRS(8),
5357         THERMAL_ATTRS(9),
5358         THERMAL_ATTRS(10),
5359         THERMAL_ATTRS(11),
5360         THERMAL_ATTRS(12),
5361         THERMAL_ATTRS(13),
5362         THERMAL_ATTRS(14),
5363         THERMAL_ATTRS(15),
5364         THERMAL_ATTRS(0),
5365         THERMAL_ATTRS(1),
5366         THERMAL_ATTRS(2),
5367         THERMAL_ATTRS(3),
5368         THERMAL_ATTRS(4),
5369         THERMAL_ATTRS(5),
5370         THERMAL_ATTRS(6),
5371         THERMAL_ATTRS(7),
5372         NULL
5373 };
5374
5375 static const struct attribute_group thermal_temp_input16_group = {
5376         .attrs = thermal_temp_input_attr
5377 };
5378
5379 static const struct attribute_group thermal_temp_input8_group = {
5380         .attrs = &thermal_temp_input_attr[8]
5381 };
5382
5383 #undef THERMAL_SENSOR_ATTR_TEMP
5384 #undef THERMAL_ATTRS
5385
5386 /* --------------------------------------------------------------------- */
5387
5388 static int __init thermal_init(struct ibm_init_struct *iibm)
5389 {
5390         u8 t, ta1, ta2;
5391         int i;
5392         int acpi_tmp7;
5393         int res;
5394
5395         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5396
5397         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5398
5399         if (thinkpad_id.ec_model) {
5400                 /*
5401                  * Direct EC access mode: sensors at registers
5402                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5403                  * non-implemented, thermal sensors return 0x80 when
5404                  * not available
5405                  */
5406
5407                 ta1 = ta2 = 0;
5408                 for (i = 0; i < 8; i++) {
5409                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5410                                 ta1 |= t;
5411                         } else {
5412                                 ta1 = 0;
5413                                 break;
5414                         }
5415                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5416                                 ta2 |= t;
5417                         } else {
5418                                 ta1 = 0;
5419                                 break;
5420                         }
5421                 }
5422                 if (ta1 == 0) {
5423                         /* This is sheer paranoia, but we handle it anyway */
5424                         if (acpi_tmp7) {
5425                                 printk(TPACPI_ERR
5426                                        "ThinkPad ACPI EC access misbehaving, "
5427                                        "falling back to ACPI TMPx access "
5428                                        "mode\n");
5429                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5430                         } else {
5431                                 printk(TPACPI_ERR
5432                                        "ThinkPad ACPI EC access misbehaving, "
5433                                        "disabling thermal sensors access\n");
5434                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5435                         }
5436                 } else {
5437                         thermal_read_mode =
5438                             (ta2 != 0) ?
5439                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5440                 }
5441         } else if (acpi_tmp7) {
5442                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5443                         /* 600e/x, 770e, 770x */
5444                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5445                 } else {
5446                         /* Standard ACPI TMPx access, max 8 sensors */
5447                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5448                 }
5449         } else {
5450                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5451                 thermal_read_mode = TPACPI_THERMAL_NONE;
5452         }
5453
5454         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5455                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5456                 thermal_read_mode);
5457
5458         switch (thermal_read_mode) {
5459         case TPACPI_THERMAL_TPEC_16:
5460                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5461                                 &thermal_temp_input16_group);
5462                 if (res)
5463                         return res;
5464                 break;
5465         case TPACPI_THERMAL_TPEC_8:
5466         case TPACPI_THERMAL_ACPI_TMP07:
5467         case TPACPI_THERMAL_ACPI_UPDT:
5468                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5469                                 &thermal_temp_input8_group);
5470                 if (res)
5471                         return res;
5472                 break;
5473         case TPACPI_THERMAL_NONE:
5474         default:
5475                 return 1;
5476         }
5477
5478         return 0;
5479 }
5480
5481 static void thermal_exit(void)
5482 {
5483         switch (thermal_read_mode) {
5484         case TPACPI_THERMAL_TPEC_16:
5485                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5486                                    &thermal_temp_input16_group);
5487                 break;
5488         case TPACPI_THERMAL_TPEC_8:
5489         case TPACPI_THERMAL_ACPI_TMP07:
5490         case TPACPI_THERMAL_ACPI_UPDT:
5491                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5492                                    &thermal_temp_input16_group);
5493                 break;
5494         case TPACPI_THERMAL_NONE:
5495         default:
5496                 break;
5497         }
5498 }
5499
5500 static int thermal_read(char *p)
5501 {
5502         int len = 0;
5503         int n, i;
5504         struct ibm_thermal_sensors_struct t;
5505
5506         n = thermal_get_sensors(&t);
5507         if (unlikely(n < 0))
5508                 return n;
5509
5510         len += sprintf(p + len, "temperatures:\t");
5511
5512         if (n > 0) {
5513                 for (i = 0; i < (n - 1); i++)
5514                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5515                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5516         } else
5517                 len += sprintf(p + len, "not supported\n");
5518
5519         return len;
5520 }
5521
5522 static struct ibm_struct thermal_driver_data = {
5523         .name = "thermal",
5524         .read = thermal_read,
5525         .exit = thermal_exit,
5526 };
5527
5528 /*************************************************************************
5529  * EC Dump subdriver
5530  */
5531
5532 static u8 ecdump_regs[256];
5533
5534 static int ecdump_read(char *p)
5535 {
5536         int len = 0;
5537         int i, j;
5538         u8 v;
5539
5540         len += sprintf(p + len, "EC      "
5541                        " +00 +01 +02 +03 +04 +05 +06 +07"
5542                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5543         for (i = 0; i < 256; i += 16) {
5544                 len += sprintf(p + len, "EC 0x%02x:", i);
5545                 for (j = 0; j < 16; j++) {
5546                         if (!acpi_ec_read(i + j, &v))
5547                                 break;
5548                         if (v != ecdump_regs[i + j])
5549                                 len += sprintf(p + len, " *%02x", v);
5550                         else
5551                                 len += sprintf(p + len, "  %02x", v);
5552                         ecdump_regs[i + j] = v;
5553                 }
5554                 len += sprintf(p + len, "\n");
5555                 if (j != 16)
5556                         break;
5557         }
5558
5559         /* These are way too dangerous to advertise openly... */
5560 #if 0
5561         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5562                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5563         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5564                        " (<offset> is 00-ff, <value> is 0-255)\n");
5565 #endif
5566         return len;
5567 }
5568
5569 static int ecdump_write(char *buf)
5570 {
5571         char *cmd;
5572         int i, v;
5573
5574         while ((cmd = next_cmd(&buf))) {
5575                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5576                         /* i and v set */
5577                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5578                         /* i and v set */
5579                 } else
5580                         return -EINVAL;
5581                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5582                         if (!acpi_ec_write(i, v))
5583                                 return -EIO;
5584                 } else
5585                         return -EINVAL;
5586         }
5587
5588         return 0;
5589 }
5590
5591 static struct ibm_struct ecdump_driver_data = {
5592         .name = "ecdump",
5593         .read = ecdump_read,
5594         .write = ecdump_write,
5595         .flags.experimental = 1,
5596 };
5597
5598 /*************************************************************************
5599  * Backlight/brightness subdriver
5600  */
5601
5602 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5603
5604 /*
5605  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5606  * CMOS NVRAM byte 0x5E, bits 0-3.
5607  *
5608  * EC HBRV (0x31) has the following layout
5609  *   Bit 7: unknown function
5610  *   Bit 6: unknown function
5611  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5612  *   Bit 4: must be set to zero to avoid problems
5613  *   Bit 3-0: backlight brightness level
5614  *
5615  * brightness_get_raw returns status data in the HBRV layout
5616  *
5617  * WARNING: The X61 has been verified to use HBRV for something else, so
5618  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5619  * testing on the very early *60 Lenovo models...
5620  */
5621
5622 enum {
5623         TP_EC_BACKLIGHT = 0x31,
5624
5625         /* TP_EC_BACKLIGHT bitmasks */
5626         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5627         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5628         TP_EC_BACKLIGHT_MAPSW = 0x20,
5629 };
5630
5631 enum tpacpi_brightness_access_mode {
5632         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5633         TPACPI_BRGHT_MODE_EC,           /* EC control */
5634         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5635         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5636         TPACPI_BRGHT_MODE_MAX
5637 };
5638
5639 static struct backlight_device *ibm_backlight_device;
5640
5641 static enum tpacpi_brightness_access_mode brightness_mode =
5642                 TPACPI_BRGHT_MODE_MAX;
5643
5644 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5645
5646 static struct mutex brightness_mutex;
5647
5648 /* NVRAM brightness access,
5649  * call with brightness_mutex held! */
5650 static unsigned int tpacpi_brightness_nvram_get(void)
5651 {
5652         u8 lnvram;
5653
5654         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5655                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5656                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5657         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5658
5659         return lnvram;
5660 }
5661
5662 static void tpacpi_brightness_checkpoint_nvram(void)
5663 {
5664         u8 lec = 0;
5665         u8 b_nvram;
5666
5667         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5668                 return;
5669
5670         vdbg_printk(TPACPI_DBG_BRGHT,
5671                 "trying to checkpoint backlight level to NVRAM...\n");
5672
5673         if (mutex_lock_killable(&brightness_mutex) < 0)
5674                 return;
5675
5676         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5677                 goto unlock;
5678         lec &= TP_EC_BACKLIGHT_LVLMSK;
5679         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5680
5681         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5682                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5683                 /* NVRAM needs update */
5684                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5685                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5686                 b_nvram |= lec;
5687                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5688                 dbg_printk(TPACPI_DBG_BRGHT,
5689                            "updated NVRAM backlight level to %u (0x%02x)\n",
5690                            (unsigned int) lec, (unsigned int) b_nvram);
5691         } else
5692                 vdbg_printk(TPACPI_DBG_BRGHT,
5693                            "NVRAM backlight level already is %u (0x%02x)\n",
5694                            (unsigned int) lec, (unsigned int) b_nvram);
5695
5696 unlock:
5697         mutex_unlock(&brightness_mutex);
5698 }
5699
5700
5701 /* call with brightness_mutex held! */
5702 static int tpacpi_brightness_get_raw(int *status)
5703 {
5704         u8 lec = 0;
5705
5706         switch (brightness_mode) {
5707         case TPACPI_BRGHT_MODE_UCMS_STEP:
5708                 *status = tpacpi_brightness_nvram_get();
5709                 return 0;
5710         case TPACPI_BRGHT_MODE_EC:
5711         case TPACPI_BRGHT_MODE_ECNVRAM:
5712                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5713                         return -EIO;
5714                 *status = lec;
5715                 return 0;
5716         default:
5717                 return -ENXIO;
5718         }
5719 }
5720
5721 /* call with brightness_mutex held! */
5722 /* do NOT call with illegal backlight level value */
5723 static int tpacpi_brightness_set_ec(unsigned int value)
5724 {
5725         u8 lec = 0;
5726
5727         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5728                 return -EIO;
5729
5730         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5731                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5732                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5733                 return -EIO;
5734
5735         return 0;
5736 }
5737
5738 /* call with brightness_mutex held! */
5739 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5740 {
5741         int cmos_cmd, inc;
5742         unsigned int current_value, i;
5743
5744         current_value = tpacpi_brightness_nvram_get();
5745
5746         if (value == current_value)
5747                 return 0;
5748
5749         cmos_cmd = (value > current_value) ?
5750                         TP_CMOS_BRIGHTNESS_UP :
5751                         TP_CMOS_BRIGHTNESS_DOWN;
5752         inc = (value > current_value) ? 1 : -1;
5753
5754         for (i = current_value; i != value; i += inc)
5755                 if (issue_thinkpad_cmos_command(cmos_cmd))
5756                         return -EIO;
5757
5758         return 0;
5759 }
5760
5761 /* May return EINTR which can always be mapped to ERESTARTSYS */
5762 static int brightness_set(unsigned int value)
5763 {
5764         int res;
5765
5766         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5767             value < 0)
5768                 return -EINVAL;
5769
5770         vdbg_printk(TPACPI_DBG_BRGHT,
5771                         "set backlight level to %d\n", value);
5772
5773         res = mutex_lock_killable(&brightness_mutex);
5774         if (res < 0)
5775                 return res;
5776
5777         switch (brightness_mode) {
5778         case TPACPI_BRGHT_MODE_EC:
5779         case TPACPI_BRGHT_MODE_ECNVRAM:
5780                 res = tpacpi_brightness_set_ec(value);
5781                 break;
5782         case TPACPI_BRGHT_MODE_UCMS_STEP:
5783                 res = tpacpi_brightness_set_ucmsstep(value);
5784                 break;
5785         default:
5786                 res = -ENXIO;
5787         }
5788
5789         mutex_unlock(&brightness_mutex);
5790         return res;
5791 }
5792
5793 /* sysfs backlight class ----------------------------------------------- */
5794
5795 static int brightness_update_status(struct backlight_device *bd)
5796 {
5797         unsigned int level =
5798                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5799                  bd->props.power == FB_BLANK_UNBLANK) ?
5800                                 bd->props.brightness : 0;
5801
5802         dbg_printk(TPACPI_DBG_BRGHT,
5803                         "backlight: attempt to set level to %d\n",
5804                         level);
5805
5806         /* it is the backlight class's job (caller) to handle
5807          * EINTR and other errors properly */
5808         return brightness_set(level);
5809 }
5810
5811 static int brightness_get(struct backlight_device *bd)
5812 {
5813         int status, res;
5814
5815         res = mutex_lock_killable(&brightness_mutex);
5816         if (res < 0)
5817                 return 0;
5818
5819         res = tpacpi_brightness_get_raw(&status);
5820
5821         mutex_unlock(&brightness_mutex);
5822
5823         if (res < 0)
5824                 return 0;
5825
5826         return status & TP_EC_BACKLIGHT_LVLMSK;
5827 }
5828
5829 static struct backlight_ops ibm_backlight_data = {
5830         .get_brightness = brightness_get,
5831         .update_status  = brightness_update_status,
5832 };
5833
5834 /* --------------------------------------------------------------------- */
5835
5836 /*
5837  * These are only useful for models that have only one possibility
5838  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5839  * these quirks.
5840  */
5841 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5842 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5843 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5844
5845 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5846         /* Models with ATI GPUs known to require ECNVRAM mode */
5847         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5848
5849         /* Models with ATI GPUs that can use ECNVRAM */
5850         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),
5851         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5852         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5853         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5854
5855         /* Models with Intel Extreme Graphics 2 */
5856         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),
5857         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5858         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5859
5860         /* Models with Intel GMA900 */
5861         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5862         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5863         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5864 };
5865
5866 static int __init brightness_init(struct ibm_init_struct *iibm)
5867 {
5868         int b;
5869         unsigned long quirks;
5870
5871         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5872
5873         mutex_init(&brightness_mutex);
5874
5875         quirks = tpacpi_check_quirks(brightness_quirk_table,
5876                                 ARRAY_SIZE(brightness_quirk_table));
5877
5878         /*
5879          * We always attempt to detect acpi support, so as to switch
5880          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5881          * going to publish a backlight interface
5882          */
5883         b = tpacpi_check_std_acpi_brightness_support();
5884         if (b > 0) {
5885
5886                 if (acpi_video_backlight_support()) {
5887                         if (brightness_enable > 1) {
5888                                 printk(TPACPI_NOTICE
5889                                        "Standard ACPI backlight interface "
5890                                        "available, not loading native one.\n");
5891                                 return 1;
5892                         } else if (brightness_enable == 1) {
5893                                 printk(TPACPI_NOTICE
5894                                        "Backlight control force enabled, even if standard "
5895                                        "ACPI backlight interface is available\n");
5896                         }
5897                 } else {
5898                         if (brightness_enable > 1) {
5899                                 printk(TPACPI_NOTICE
5900                                        "Standard ACPI backlight interface not "
5901                                        "available, thinkpad_acpi native "
5902                                        "brightness control enabled\n");
5903                         }
5904                 }
5905         }
5906
5907         if (!brightness_enable) {
5908                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5909                            "brightness support disabled by "
5910                            "module parameter\n");
5911                 return 1;
5912         }
5913
5914         if (b > 16) {
5915                 printk(TPACPI_ERR
5916                        "Unsupported brightness interface, "
5917                        "please contact %s\n", TPACPI_MAIL);
5918                 return 1;
5919         }
5920         if (b == 16)
5921                 tp_features.bright_16levels = 1;
5922
5923         /*
5924          * Check for module parameter bogosity, note that we
5925          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5926          * able to detect "unspecified"
5927          */
5928         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5929                 return -EINVAL;
5930
5931         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5932         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5933             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5934                 if (quirks & TPACPI_BRGHT_Q_EC)
5935                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5936                 else
5937                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5938
5939                 dbg_printk(TPACPI_DBG_BRGHT,
5940                            "driver auto-selected brightness_mode=%d\n",
5941                            brightness_mode);
5942         }
5943
5944         /* Safety */
5945         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5946             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5947              brightness_mode == TPACPI_BRGHT_MODE_EC))
5948                 return -EINVAL;
5949
5950         if (tpacpi_brightness_get_raw(&b) < 0)
5951                 return 1;
5952
5953         if (tp_features.bright_16levels)
5954                 printk(TPACPI_INFO
5955                        "detected a 16-level brightness capable ThinkPad\n");
5956
5957         ibm_backlight_device = backlight_device_register(
5958                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5959                                         &ibm_backlight_data);
5960         if (IS_ERR(ibm_backlight_device)) {
5961                 printk(TPACPI_ERR "Could not register backlight device\n");
5962                 return PTR_ERR(ibm_backlight_device);
5963         }
5964         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5965                         "brightness is supported\n");
5966
5967         if (quirks & TPACPI_BRGHT_Q_ASK) {
5968                 printk(TPACPI_NOTICE
5969                         "brightness: will use unverified default: "
5970                         "brightness_mode=%d\n", brightness_mode);
5971                 printk(TPACPI_NOTICE
5972                         "brightness: please report to %s whether it works well "
5973                         "or not on your ThinkPad\n", TPACPI_MAIL);
5974         }
5975
5976         ibm_backlight_device->props.max_brightness =
5977                                 (tp_features.bright_16levels)? 15 : 7;
5978         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5979         backlight_update_status(ibm_backlight_device);
5980
5981         return 0;
5982 }
5983
5984 static void brightness_suspend(pm_message_t state)
5985 {
5986         tpacpi_brightness_checkpoint_nvram();
5987 }
5988
5989 static void brightness_shutdown(void)
5990 {
5991         tpacpi_brightness_checkpoint_nvram();
5992 }
5993
5994 static void brightness_exit(void)
5995 {
5996         if (ibm_backlight_device) {
5997                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5998                             "calling backlight_device_unregister()\n");
5999                 backlight_device_unregister(ibm_backlight_device);
6000         }
6001
6002         tpacpi_brightness_checkpoint_nvram();
6003 }
6004
6005 static int brightness_read(char *p)
6006 {
6007         int len = 0;
6008         int level;
6009
6010         level = brightness_get(NULL);
6011         if (level < 0) {
6012                 len += sprintf(p + len, "level:\t\tunreadable\n");
6013         } else {
6014                 len += sprintf(p + len, "level:\t\t%d\n", level);
6015                 len += sprintf(p + len, "commands:\tup, down\n");
6016                 len += sprintf(p + len, "commands:\tlevel <level>"
6017                                " (<level> is 0-%d)\n",
6018                                (tp_features.bright_16levels) ? 15 : 7);
6019         }
6020
6021         return len;
6022 }
6023
6024 static int brightness_write(char *buf)
6025 {
6026         int level;
6027         int rc;
6028         char *cmd;
6029         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6030
6031         level = brightness_get(NULL);
6032         if (level < 0)
6033                 return level;
6034
6035         while ((cmd = next_cmd(&buf))) {
6036                 if (strlencmp(cmd, "up") == 0) {
6037                         if (level < max_level)
6038                                 level++;
6039                 } else if (strlencmp(cmd, "down") == 0) {
6040                         if (level > 0)
6041                                 level--;
6042                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6043                            level >= 0 && level <= max_level) {
6044                         /* new level set */
6045                 } else
6046                         return -EINVAL;
6047         }
6048
6049         tpacpi_disclose_usertask("procfs brightness",
6050                         "set level to %d\n", level);
6051
6052         /*
6053          * Now we know what the final level should be, so we try to set it.
6054          * Doing it this way makes the syscall restartable in case of EINTR
6055          */
6056         rc = brightness_set(level);
6057         return (rc == -EINTR)? ERESTARTSYS : rc;
6058 }
6059
6060 static struct ibm_struct brightness_driver_data = {
6061         .name = "brightness",
6062         .read = brightness_read,
6063         .write = brightness_write,
6064         .exit = brightness_exit,
6065         .suspend = brightness_suspend,
6066         .shutdown = brightness_shutdown,
6067 };
6068
6069 /*************************************************************************
6070  * Volume subdriver
6071  */
6072
6073 static int volume_offset = 0x30;
6074
6075 static int volume_read(char *p)
6076 {
6077         int len = 0;
6078         u8 level;
6079
6080         if (!acpi_ec_read(volume_offset, &level)) {
6081                 len += sprintf(p + len, "level:\t\tunreadable\n");
6082         } else {
6083                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6084                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6085                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6086                 len += sprintf(p + len, "commands:\tlevel <level>"
6087                                " (<level> is 0-15)\n");
6088         }
6089
6090         return len;
6091 }
6092
6093 static int volume_write(char *buf)
6094 {
6095         int cmos_cmd, inc, i;
6096         u8 level, mute;
6097         int new_level, new_mute;
6098         char *cmd;
6099
6100         while ((cmd = next_cmd(&buf))) {
6101                 if (!acpi_ec_read(volume_offset, &level))
6102                         return -EIO;
6103                 new_mute = mute = level & 0x40;
6104                 new_level = level = level & 0xf;
6105
6106                 if (strlencmp(cmd, "up") == 0) {
6107                         if (mute)
6108                                 new_mute = 0;
6109                         else
6110                                 new_level = level == 15 ? 15 : level + 1;
6111                 } else if (strlencmp(cmd, "down") == 0) {
6112                         if (mute)
6113                                 new_mute = 0;
6114                         else
6115                                 new_level = level == 0 ? 0 : level - 1;
6116                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6117                            new_level >= 0 && new_level <= 15) {
6118                         /* new_level set */
6119                 } else if (strlencmp(cmd, "mute") == 0) {
6120                         new_mute = 0x40;
6121                 } else
6122                         return -EINVAL;
6123
6124                 if (new_level != level) {
6125                         /* mute doesn't change */
6126
6127                         cmos_cmd = (new_level > level) ?
6128                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6129                         inc = new_level > level ? 1 : -1;
6130
6131                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6132                                      !acpi_ec_write(volume_offset, level)))
6133                                 return -EIO;
6134
6135                         for (i = level; i != new_level; i += inc)
6136                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6137                                     !acpi_ec_write(volume_offset, i + inc))
6138                                         return -EIO;
6139
6140                         if (mute &&
6141                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6142                              !acpi_ec_write(volume_offset, new_level + mute))) {
6143                                 return -EIO;
6144                         }
6145                 }
6146
6147                 if (new_mute != mute) {
6148                         /* level doesn't change */
6149
6150                         cmos_cmd = (new_mute) ?
6151                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6152
6153                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6154                             !acpi_ec_write(volume_offset, level + new_mute))
6155                                 return -EIO;
6156                 }
6157         }
6158
6159         return 0;
6160 }
6161
6162 static struct ibm_struct volume_driver_data = {
6163         .name = "volume",
6164         .read = volume_read,
6165         .write = volume_write,
6166 };
6167
6168 /*************************************************************************
6169  * Fan subdriver
6170  */
6171
6172 /*
6173  * FAN ACCESS MODES
6174  *
6175  * TPACPI_FAN_RD_ACPI_GFAN:
6176  *      ACPI GFAN method: returns fan level
6177  *
6178  *      see TPACPI_FAN_WR_ACPI_SFAN
6179  *      EC 0x2f (HFSP) not available if GFAN exists
6180  *
6181  * TPACPI_FAN_WR_ACPI_SFAN:
6182  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6183  *
6184  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6185  *      it for writing.
6186  *
6187  * TPACPI_FAN_WR_TPEC:
6188  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6189  *      Supported on almost all ThinkPads
6190  *
6191  *      Fan speed changes of any sort (including those caused by the
6192  *      disengaged mode) are usually done slowly by the firmware as the
6193  *      maximum ammount of fan duty cycle change per second seems to be
6194  *      limited.
6195  *
6196  *      Reading is not available if GFAN exists.
6197  *      Writing is not available if SFAN exists.
6198  *
6199  *      Bits
6200  *       7      automatic mode engaged;
6201  *              (default operation mode of the ThinkPad)
6202  *              fan level is ignored in this mode.
6203  *       6      full speed mode (takes precedence over bit 7);
6204  *              not available on all thinkpads.  May disable
6205  *              the tachometer while the fan controller ramps up
6206  *              the speed (which can take up to a few *minutes*).
6207  *              Speeds up fan to 100% duty-cycle, which is far above
6208  *              the standard RPM levels.  It is not impossible that
6209  *              it could cause hardware damage.
6210  *      5-3     unused in some models.  Extra bits for fan level
6211  *              in others, but still useless as all values above
6212  *              7 map to the same speed as level 7 in these models.
6213  *      2-0     fan level (0..7 usually)
6214  *                      0x00 = stop
6215  *                      0x07 = max (set when temperatures critical)
6216  *              Some ThinkPads may have other levels, see
6217  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6218  *
6219  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6220  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6221  *      does so, its initial value is meaningless (0x07).
6222  *
6223  *      For firmware bugs, refer to:
6224  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6225  *
6226  *      ----
6227  *
6228  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6229  *      Main fan tachometer reading (in RPM)
6230  *
6231  *      This register is present on all ThinkPads with a new-style EC, and
6232  *      it is known not to be present on the A21m/e, and T22, as there is
6233  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6234  *      ThinkPads from this same time period (and earlier) probably lack the
6235  *      tachometer as well.
6236  *
6237  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6238  *      was never fixed by IBM to report the EC firmware version string
6239  *      probably support the tachometer (like the early X models), so
6240  *      detecting it is quite hard.  We need more data to know for sure.
6241  *
6242  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6243  *      might result.
6244  *
6245  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6246  *      mode.
6247  *
6248  *      For firmware bugs, refer to:
6249  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6250  *
6251  *      ----
6252  *
6253  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6254  *
6255  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6256  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6257  *      is one, the tachometer registers show the speed of the auxiliary
6258  *      fan.
6259  *
6260  *      Fan control seems to affect both fans, regardless of the state
6261  *      of this bit.
6262  *
6263  *      So far, only the firmware for the X60/X61 non-tablet versions
6264  *      seem to support this (firmware TP-7M).
6265  *
6266  * TPACPI_FAN_WR_ACPI_FANS:
6267  *      ThinkPad X31, X40, X41.  Not available in the X60.
6268  *
6269  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6270  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6271  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6272  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6273  *
6274  *      The speeds are stored on handles
6275  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6276  *
6277  *      There are three default speed sets, acessible as handles:
6278  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6279  *
6280  *      ACPI DSDT switches which set is in use depending on various
6281  *      factors.
6282  *
6283  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6284  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6285  *      but the ACPI tables just mention level 7.
6286  */
6287
6288 enum {                                  /* Fan control constants */
6289         fan_status_offset = 0x2f,       /* EC register 0x2f */
6290         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6291                                          * 0x84 must be read before 0x85 */
6292         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6293                                            bit 0 selects which fan is active */
6294
6295         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6296         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6297
6298         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6299 };
6300
6301 enum fan_status_access_mode {
6302         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6303         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6304         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6305 };
6306
6307 enum fan_control_access_mode {
6308         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6309         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6310         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6311         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6312 };
6313
6314 enum fan_control_commands {
6315         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6316         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6317         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6318                                                  * and also watchdog cmd */
6319 };
6320
6321 static int fan_control_allowed;
6322
6323 static enum fan_status_access_mode fan_status_access_mode;
6324 static enum fan_control_access_mode fan_control_access_mode;
6325 static enum fan_control_commands fan_control_commands;
6326
6327 static u8 fan_control_initial_status;
6328 static u8 fan_control_desired_level;
6329 static u8 fan_control_resume_level;
6330 static int fan_watchdog_maxinterval;
6331
6332 static struct mutex fan_mutex;
6333
6334 static void fan_watchdog_fire(struct work_struct *ignored);
6335 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6336
6337 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6338 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6339            "\\FSPD",            /* 600e/x, 770e, 770x */
6340            );                   /* all others */
6341 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6342            "JFNS",              /* 770x-JL */
6343            );                   /* all others */
6344
6345 /*
6346  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6347  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6348  * be in auto mode (0x80).
6349  *
6350  * This is corrected by any write to HFSP either by the driver, or
6351  * by the firmware.
6352  *
6353  * We assume 0x07 really means auto mode while this quirk is active,
6354  * as this is far more likely than the ThinkPad being in level 7,
6355  * which is only used by the firmware during thermal emergencies.
6356  *
6357  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6358  * TP-70 (T43, R52), which are known to be buggy.
6359  */
6360
6361 static void fan_quirk1_setup(void)
6362 {
6363         if (fan_control_initial_status == 0x07) {
6364                 printk(TPACPI_NOTICE
6365                        "fan_init: initial fan status is unknown, "
6366                        "assuming it is in auto mode\n");
6367                 tp_features.fan_ctrl_status_undef = 1;
6368         }
6369 }
6370
6371 static void fan_quirk1_handle(u8 *fan_status)
6372 {
6373         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6374                 if (*fan_status != fan_control_initial_status) {
6375                         /* something changed the HFSP regisnter since
6376                          * driver init time, so it is not undefined
6377                          * anymore */
6378                         tp_features.fan_ctrl_status_undef = 0;
6379                 } else {
6380                         /* Return most likely status. In fact, it
6381                          * might be the only possible status */
6382                         *fan_status = TP_EC_FAN_AUTO;
6383                 }
6384         }
6385 }
6386
6387 /* Select main fan on X60/X61, NOOP on others */
6388 static bool fan_select_fan1(void)
6389 {
6390         if (tp_features.second_fan) {
6391                 u8 val;
6392
6393                 if (ec_read(fan_select_offset, &val) < 0)
6394                         return false;
6395                 val &= 0xFEU;
6396                 if (ec_write(fan_select_offset, val) < 0)
6397                         return false;
6398         }
6399         return true;
6400 }
6401
6402 /* Select secondary fan on X60/X61 */
6403 static bool fan_select_fan2(void)
6404 {
6405         u8 val;
6406
6407         if (!tp_features.second_fan)
6408                 return false;
6409
6410         if (ec_read(fan_select_offset, &val) < 0)
6411                 return false;
6412         val |= 0x01U;
6413         if (ec_write(fan_select_offset, val) < 0)
6414                 return false;
6415
6416         return true;
6417 }
6418
6419 /*
6420  * Call with fan_mutex held
6421  */
6422 static void fan_update_desired_level(u8 status)
6423 {
6424         if ((status &
6425              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6426                 if (status > 7)
6427                         fan_control_desired_level = 7;
6428                 else
6429                         fan_control_desired_level = status;
6430         }
6431 }
6432
6433 static int fan_get_status(u8 *status)
6434 {
6435         u8 s;
6436
6437         /* TODO:
6438          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6439
6440         switch (fan_status_access_mode) {
6441         case TPACPI_FAN_RD_ACPI_GFAN:
6442                 /* 570, 600e/x, 770e, 770x */
6443
6444                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6445                         return -EIO;
6446
6447                 if (likely(status))
6448                         *status = s & 0x07;
6449
6450                 break;
6451
6452         case TPACPI_FAN_RD_TPEC:
6453                 /* all except 570, 600e/x, 770e, 770x */
6454                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6455                         return -EIO;
6456
6457                 if (likely(status)) {
6458                         *status = s;
6459                         fan_quirk1_handle(status);
6460                 }
6461
6462                 break;
6463
6464         default:
6465                 return -ENXIO;
6466         }
6467
6468         return 0;
6469 }
6470
6471 static int fan_get_status_safe(u8 *status)
6472 {
6473         int rc;
6474         u8 s;
6475
6476         if (mutex_lock_killable(&fan_mutex))
6477                 return -ERESTARTSYS;
6478         rc = fan_get_status(&s);
6479         if (!rc)
6480                 fan_update_desired_level(s);
6481         mutex_unlock(&fan_mutex);
6482
6483         if (status)
6484                 *status = s;
6485
6486         return rc;
6487 }
6488
6489 static int fan_get_speed(unsigned int *speed)
6490 {
6491         u8 hi, lo;
6492
6493         switch (fan_status_access_mode) {
6494         case TPACPI_FAN_RD_TPEC:
6495                 /* all except 570, 600e/x, 770e, 770x */
6496                 if (unlikely(!fan_select_fan1()))
6497                         return -EIO;
6498                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6499                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6500                         return -EIO;
6501
6502                 if (likely(speed))
6503                         *speed = (hi << 8) | lo;
6504
6505                 break;
6506
6507         default:
6508                 return -ENXIO;
6509         }
6510
6511         return 0;
6512 }
6513
6514 static int fan2_get_speed(unsigned int *speed)
6515 {
6516         u8 hi, lo;
6517         bool rc;
6518
6519         switch (fan_status_access_mode) {
6520         case TPACPI_FAN_RD_TPEC:
6521                 /* all except 570, 600e/x, 770e, 770x */
6522                 if (unlikely(!fan_select_fan2()))
6523                         return -EIO;
6524                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6525                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6526                 fan_select_fan1(); /* play it safe */
6527                 if (rc)
6528                         return -EIO;
6529
6530                 if (likely(speed))
6531                         *speed = (hi << 8) | lo;
6532
6533                 break;
6534
6535         default:
6536                 return -ENXIO;
6537         }
6538
6539         return 0;
6540 }
6541
6542 static int fan_set_level(int level)
6543 {
6544         if (!fan_control_allowed)
6545                 return -EPERM;
6546
6547         switch (fan_control_access_mode) {
6548         case TPACPI_FAN_WR_ACPI_SFAN:
6549                 if (level >= 0 && level <= 7) {
6550                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6551                                 return -EIO;
6552                 } else
6553                         return -EINVAL;
6554                 break;
6555
6556         case TPACPI_FAN_WR_ACPI_FANS:
6557         case TPACPI_FAN_WR_TPEC:
6558                 if (!(level & TP_EC_FAN_AUTO) &&
6559                     !(level & TP_EC_FAN_FULLSPEED) &&
6560                     ((level < 0) || (level > 7)))
6561                         return -EINVAL;
6562
6563                 /* safety net should the EC not support AUTO
6564                  * or FULLSPEED mode bits and just ignore them */
6565                 if (level & TP_EC_FAN_FULLSPEED)
6566                         level |= 7;     /* safety min speed 7 */
6567                 else if (level & TP_EC_FAN_AUTO)
6568                         level |= 4;     /* safety min speed 4 */
6569
6570                 if (!acpi_ec_write(fan_status_offset, level))
6571                         return -EIO;
6572                 else
6573                         tp_features.fan_ctrl_status_undef = 0;
6574                 break;
6575
6576         default:
6577                 return -ENXIO;
6578         }
6579
6580         vdbg_printk(TPACPI_DBG_FAN,
6581                 "fan control: set fan control register to 0x%02x\n", level);
6582         return 0;
6583 }
6584
6585 static int fan_set_level_safe(int level)
6586 {
6587         int rc;
6588
6589         if (!fan_control_allowed)
6590                 return -EPERM;
6591
6592         if (mutex_lock_killable(&fan_mutex))
6593                 return -ERESTARTSYS;
6594
6595         if (level == TPACPI_FAN_LAST_LEVEL)
6596                 level = fan_control_desired_level;
6597
6598         rc = fan_set_level(level);
6599         if (!rc)
6600                 fan_update_desired_level(level);
6601
6602         mutex_unlock(&fan_mutex);
6603         return rc;
6604 }
6605
6606 static int fan_set_enable(void)
6607 {
6608         u8 s;
6609         int rc;
6610
6611         if (!fan_control_allowed)
6612                 return -EPERM;
6613
6614         if (mutex_lock_killable(&fan_mutex))
6615                 return -ERESTARTSYS;
6616
6617         switch (fan_control_access_mode) {
6618         case TPACPI_FAN_WR_ACPI_FANS:
6619         case TPACPI_FAN_WR_TPEC:
6620                 rc = fan_get_status(&s);
6621                 if (rc < 0)
6622                         break;
6623
6624                 /* Don't go out of emergency fan mode */
6625                 if (s != 7) {
6626                         s &= 0x07;
6627                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6628                 }
6629
6630                 if (!acpi_ec_write(fan_status_offset, s))
6631                         rc = -EIO;
6632                 else {
6633                         tp_features.fan_ctrl_status_undef = 0;
6634                         rc = 0;
6635                 }
6636                 break;
6637
6638         case TPACPI_FAN_WR_ACPI_SFAN:
6639                 rc = fan_get_status(&s);
6640                 if (rc < 0)
6641                         break;
6642
6643                 s &= 0x07;
6644
6645                 /* Set fan to at least level 4 */
6646                 s |= 4;
6647
6648                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6649                         rc = -EIO;
6650                 else
6651                         rc = 0;
6652                 break;
6653
6654         default:
6655                 rc = -ENXIO;
6656         }
6657
6658         mutex_unlock(&fan_mutex);
6659
6660         if (!rc)
6661                 vdbg_printk(TPACPI_DBG_FAN,
6662                         "fan control: set fan control register to 0x%02x\n",
6663                         s);
6664         return rc;
6665 }
6666
6667 static int fan_set_disable(void)
6668 {
6669         int rc;
6670
6671         if (!fan_control_allowed)
6672                 return -EPERM;
6673
6674         if (mutex_lock_killable(&fan_mutex))
6675                 return -ERESTARTSYS;
6676
6677         rc = 0;
6678         switch (fan_control_access_mode) {
6679         case TPACPI_FAN_WR_ACPI_FANS:
6680         case TPACPI_FAN_WR_TPEC:
6681                 if (!acpi_ec_write(fan_status_offset, 0x00))
6682                         rc = -EIO;
6683                 else {
6684                         fan_control_desired_level = 0;
6685                         tp_features.fan_ctrl_status_undef = 0;
6686                 }
6687                 break;
6688
6689         case TPACPI_FAN_WR_ACPI_SFAN:
6690                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6691                         rc = -EIO;
6692                 else
6693                         fan_control_desired_level = 0;
6694                 break;
6695
6696         default:
6697                 rc = -ENXIO;
6698         }
6699
6700         if (!rc)
6701                 vdbg_printk(TPACPI_DBG_FAN,
6702                         "fan control: set fan control register to 0\n");
6703
6704         mutex_unlock(&fan_mutex);
6705         return rc;
6706 }
6707
6708 static int fan_set_speed(int speed)
6709 {
6710         int rc;
6711
6712         if (!fan_control_allowed)
6713                 return -EPERM;
6714
6715         if (mutex_lock_killable(&fan_mutex))
6716                 return -ERESTARTSYS;
6717
6718         rc = 0;
6719         switch (fan_control_access_mode) {
6720         case TPACPI_FAN_WR_ACPI_FANS:
6721                 if (speed >= 0 && speed <= 65535) {
6722                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6723                                         speed, speed, speed))
6724                                 rc = -EIO;
6725                 } else
6726                         rc = -EINVAL;
6727                 break;
6728
6729         default:
6730                 rc = -ENXIO;
6731         }
6732
6733         mutex_unlock(&fan_mutex);
6734         return rc;
6735 }
6736
6737 static void fan_watchdog_reset(void)
6738 {
6739         static int fan_watchdog_active;
6740
6741         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6742                 return;
6743
6744         if (fan_watchdog_active)
6745                 cancel_delayed_work(&fan_watchdog_task);
6746
6747         if (fan_watchdog_maxinterval > 0 &&
6748             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6749                 fan_watchdog_active = 1;
6750                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6751                                 msecs_to_jiffies(fan_watchdog_maxinterval
6752                                                  * 1000))) {
6753                         printk(TPACPI_ERR
6754                                "failed to queue the fan watchdog, "
6755                                "watchdog will not trigger\n");
6756                 }
6757         } else
6758                 fan_watchdog_active = 0;
6759 }
6760
6761 static void fan_watchdog_fire(struct work_struct *ignored)
6762 {
6763         int rc;
6764
6765         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6766                 return;
6767
6768         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6769         rc = fan_set_enable();
6770         if (rc < 0) {
6771                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6772                         "will try again later...\n", -rc);
6773                 /* reschedule for later */
6774                 fan_watchdog_reset();
6775         }
6776 }
6777
6778 /*
6779  * SYSFS fan layout: hwmon compatible (device)
6780  *
6781  * pwm*_enable:
6782  *      0: "disengaged" mode
6783  *      1: manual mode
6784  *      2: native EC "auto" mode (recommended, hardware default)
6785  *
6786  * pwm*: set speed in manual mode, ignored otherwise.
6787  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6788  *      interpolation.
6789  *
6790  * fan*_input: tachometer reading, RPM
6791  *
6792  *
6793  * SYSFS fan layout: extensions
6794  *
6795  * fan_watchdog (driver):
6796  *      fan watchdog interval in seconds, 0 disables (default), max 120
6797  */
6798
6799 /* sysfs fan pwm1_enable ----------------------------------------------- */
6800 static ssize_t fan_pwm1_enable_show(struct device *dev,
6801                                     struct device_attribute *attr,
6802                                     char *buf)
6803 {
6804         int res, mode;
6805         u8 status;
6806
6807         res = fan_get_status_safe(&status);
6808         if (res)
6809                 return res;
6810
6811         if (status & TP_EC_FAN_FULLSPEED) {
6812                 mode = 0;
6813         } else if (status & TP_EC_FAN_AUTO) {
6814                 mode = 2;
6815         } else
6816                 mode = 1;
6817
6818         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6819 }
6820
6821 static ssize_t fan_pwm1_enable_store(struct device *dev,
6822                                      struct device_attribute *attr,
6823                                      const char *buf, size_t count)
6824 {
6825         unsigned long t;
6826         int res, level;
6827
6828         if (parse_strtoul(buf, 2, &t))
6829                 return -EINVAL;
6830
6831         tpacpi_disclose_usertask("hwmon pwm1_enable",
6832                         "set fan mode to %lu\n", t);
6833
6834         switch (t) {
6835         case 0:
6836                 level = TP_EC_FAN_FULLSPEED;
6837                 break;
6838         case 1:
6839                 level = TPACPI_FAN_LAST_LEVEL;
6840                 break;
6841         case 2:
6842                 level = TP_EC_FAN_AUTO;
6843                 break;
6844         case 3:
6845                 /* reserved for software-controlled auto mode */
6846                 return -ENOSYS;
6847         default:
6848                 return -EINVAL;
6849         }
6850
6851         res = fan_set_level_safe(level);
6852         if (res == -ENXIO)
6853                 return -EINVAL;
6854         else if (res < 0)
6855                 return res;
6856
6857         fan_watchdog_reset();
6858
6859         return count;
6860 }
6861
6862 static struct device_attribute dev_attr_fan_pwm1_enable =
6863         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6864                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6865
6866 /* sysfs fan pwm1 ------------------------------------------------------ */
6867 static ssize_t fan_pwm1_show(struct device *dev,
6868                              struct device_attribute *attr,
6869                              char *buf)
6870 {
6871         int res;
6872         u8 status;
6873
6874         res = fan_get_status_safe(&status);
6875         if (res)
6876                 return res;
6877
6878         if ((status &
6879              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6880                 status = fan_control_desired_level;
6881
6882         if (status > 7)
6883                 status = 7;
6884
6885         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6886 }
6887
6888 static ssize_t fan_pwm1_store(struct device *dev,
6889                               struct device_attribute *attr,
6890                               const char *buf, size_t count)
6891 {
6892         unsigned long s;
6893         int rc;
6894         u8 status, newlevel;
6895
6896         if (parse_strtoul(buf, 255, &s))
6897                 return -EINVAL;
6898
6899         tpacpi_disclose_usertask("hwmon pwm1",
6900                         "set fan speed to %lu\n", s);
6901
6902         /* scale down from 0-255 to 0-7 */
6903         newlevel = (s >> 5) & 0x07;
6904
6905         if (mutex_lock_killable(&fan_mutex))
6906                 return -ERESTARTSYS;
6907
6908         rc = fan_get_status(&status);
6909         if (!rc && (status &
6910                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6911                 rc = fan_set_level(newlevel);
6912                 if (rc == -ENXIO)
6913                         rc = -EINVAL;
6914                 else if (!rc) {
6915                         fan_update_desired_level(newlevel);
6916                         fan_watchdog_reset();
6917                 }
6918         }
6919
6920         mutex_unlock(&fan_mutex);
6921         return (rc)? rc : count;
6922 }
6923
6924 static struct device_attribute dev_attr_fan_pwm1 =
6925         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6926                 fan_pwm1_show, fan_pwm1_store);
6927
6928 /* sysfs fan fan1_input ------------------------------------------------ */
6929 static ssize_t fan_fan1_input_show(struct device *dev,
6930                            struct device_attribute *attr,
6931                            char *buf)
6932 {
6933         int res;
6934         unsigned int speed;
6935
6936         res = fan_get_speed(&speed);
6937         if (res < 0)
6938                 return res;
6939
6940         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6941 }
6942
6943 static struct device_attribute dev_attr_fan_fan1_input =
6944         __ATTR(fan1_input, S_IRUGO,
6945                 fan_fan1_input_show, NULL);
6946
6947 /* sysfs fan fan2_input ------------------------------------------------ */
6948 static ssize_t fan_fan2_input_show(struct device *dev,
6949                            struct device_attribute *attr,
6950                            char *buf)
6951 {
6952         int res;
6953         unsigned int speed;
6954
6955         res = fan2_get_speed(&speed);
6956         if (res < 0)
6957                 return res;
6958
6959         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6960 }
6961
6962 static struct device_attribute dev_attr_fan_fan2_input =
6963         __ATTR(fan2_input, S_IRUGO,
6964                 fan_fan2_input_show, NULL);
6965
6966 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6967 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6968                                      char *buf)
6969 {
6970         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6971 }
6972
6973 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6974                                       const char *buf, size_t count)
6975 {
6976         unsigned long t;
6977
6978         if (parse_strtoul(buf, 120, &t))
6979                 return -EINVAL;
6980
6981         if (!fan_control_allowed)
6982                 return -EPERM;
6983
6984         fan_watchdog_maxinterval = t;
6985         fan_watchdog_reset();
6986
6987         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6988
6989         return count;
6990 }
6991
6992 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6993                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6994
6995 /* --------------------------------------------------------------------- */
6996 static struct attribute *fan_attributes[] = {
6997         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6998         &dev_attr_fan_fan1_input.attr,
6999         NULL, /* for fan2_input */
7000         NULL
7001 };
7002
7003 static const struct attribute_group fan_attr_group = {
7004         .attrs = fan_attributes,
7005 };
7006
7007 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
7008 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
7009
7010 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
7011         { .vendor = PCI_VENDOR_ID_IBM,          \
7012           .bios = TPACPI_MATCH_ANY,             \
7013           .ec = TPID(__id1, __id2),             \
7014           .quirks = __quirks }
7015
7016 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
7017         { .vendor = PCI_VENDOR_ID_LENOVO,       \
7018           .bios = TPACPI_MATCH_ANY,             \
7019           .ec = TPID(__id1, __id2),             \
7020           .quirks = __quirks }
7021
7022 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
7023         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
7024         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
7025         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
7026         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
7027         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
7028 };
7029
7030 #undef TPACPI_FAN_QL
7031 #undef TPACPI_FAN_QI
7032
7033 static int __init fan_init(struct ibm_init_struct *iibm)
7034 {
7035         int rc;
7036         unsigned long quirks;
7037
7038         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7039                         "initializing fan subdriver\n");
7040
7041         mutex_init(&fan_mutex);
7042         fan_status_access_mode = TPACPI_FAN_NONE;
7043         fan_control_access_mode = TPACPI_FAN_WR_NONE;
7044         fan_control_commands = 0;
7045         fan_watchdog_maxinterval = 0;
7046         tp_features.fan_ctrl_status_undef = 0;
7047         tp_features.second_fan = 0;
7048         fan_control_desired_level = 7;
7049
7050         TPACPI_ACPIHANDLE_INIT(fans);
7051         TPACPI_ACPIHANDLE_INIT(gfan);
7052         TPACPI_ACPIHANDLE_INIT(sfan);
7053
7054         quirks = tpacpi_check_quirks(fan_quirk_table,
7055                                      ARRAY_SIZE(fan_quirk_table));
7056
7057         if (gfan_handle) {
7058                 /* 570, 600e/x, 770e, 770x */
7059                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
7060         } else {
7061                 /* all other ThinkPads: note that even old-style
7062                  * ThinkPad ECs supports the fan control register */
7063                 if (likely(acpi_ec_read(fan_status_offset,
7064                                         &fan_control_initial_status))) {
7065                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
7066                         if (quirks & TPACPI_FAN_Q1)
7067                                 fan_quirk1_setup();
7068                         if (quirks & TPACPI_FAN_2FAN) {
7069                                 tp_features.second_fan = 1;
7070                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7071                                         "secondary fan support enabled\n");
7072                         }
7073                 } else {
7074                         printk(TPACPI_ERR
7075                                "ThinkPad ACPI EC access misbehaving, "
7076                                "fan status and control unavailable\n");
7077                         return 1;
7078                 }
7079         }
7080
7081         if (sfan_handle) {
7082                 /* 570, 770x-JL */
7083                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
7084                 fan_control_commands |=
7085                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
7086         } else {
7087                 if (!gfan_handle) {
7088                         /* gfan without sfan means no fan control */
7089                         /* all other models implement TP EC 0x2f control */
7090
7091                         if (fans_handle) {
7092                                 /* X31, X40, X41 */
7093                                 fan_control_access_mode =
7094                                     TPACPI_FAN_WR_ACPI_FANS;
7095                                 fan_control_commands |=
7096                                     TPACPI_FAN_CMD_SPEED |
7097                                     TPACPI_FAN_CMD_LEVEL |
7098                                     TPACPI_FAN_CMD_ENABLE;
7099                         } else {
7100                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
7101                                 fan_control_commands |=
7102                                     TPACPI_FAN_CMD_LEVEL |
7103                                     TPACPI_FAN_CMD_ENABLE;
7104                         }
7105                 }
7106         }
7107
7108         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7109                 "fan is %s, modes %d, %d\n",
7110                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
7111                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
7112                 fan_status_access_mode, fan_control_access_mode);
7113
7114         /* fan control master switch */
7115         if (!fan_control_allowed) {
7116                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
7117                 fan_control_commands = 0;
7118                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
7119                            "fan control features disabled by parameter\n");
7120         }
7121
7122         /* update fan_control_desired_level */
7123         if (fan_status_access_mode != TPACPI_FAN_NONE)
7124                 fan_get_status_safe(NULL);
7125
7126         if (fan_status_access_mode != TPACPI_FAN_NONE ||
7127             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
7128                 if (tp_features.second_fan) {
7129                         /* attach second fan tachometer */
7130                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
7131                                         &dev_attr_fan_fan2_input.attr;
7132                 }
7133                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
7134                                          &fan_attr_group);
7135                 if (rc < 0)
7136                         return rc;
7137
7138                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
7139                                         &driver_attr_fan_watchdog);
7140                 if (rc < 0) {
7141                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
7142                                         &fan_attr_group);
7143                         return rc;
7144                 }
7145                 return 0;
7146         } else
7147                 return 1;
7148 }
7149
7150 static void fan_exit(void)
7151 {
7152         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7153                     "cancelling any pending fan watchdog tasks\n");
7154
7155         /* FIXME: can we really do this unconditionally? */
7156         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7157         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7158                            &driver_attr_fan_watchdog);
7159
7160         cancel_delayed_work(&fan_watchdog_task);
7161         flush_workqueue(tpacpi_wq);
7162 }
7163
7164 static void fan_suspend(pm_message_t state)
7165 {
7166         int rc;
7167
7168         if (!fan_control_allowed)
7169                 return;
7170
7171         /* Store fan status in cache */
7172         fan_control_resume_level = 0;
7173         rc = fan_get_status_safe(&fan_control_resume_level);
7174         if (rc < 0)
7175                 printk(TPACPI_NOTICE
7176                         "failed to read fan level for later "
7177                         "restore during resume: %d\n", rc);
7178
7179         /* if it is undefined, don't attempt to restore it.
7180          * KEEP THIS LAST */
7181         if (tp_features.fan_ctrl_status_undef)
7182                 fan_control_resume_level = 0;
7183 }
7184
7185 static void fan_resume(void)
7186 {
7187         u8 current_level = 7;
7188         bool do_set = false;
7189         int rc;
7190
7191         /* DSDT *always* updates status on resume */
7192         tp_features.fan_ctrl_status_undef = 0;
7193
7194         if (!fan_control_allowed ||
7195             !fan_control_resume_level ||
7196             (fan_get_status_safe(&current_level) < 0))
7197                 return;
7198
7199         switch (fan_control_access_mode) {
7200         case TPACPI_FAN_WR_ACPI_SFAN:
7201                 /* never decrease fan level */
7202                 do_set = (fan_control_resume_level > current_level);
7203                 break;
7204         case TPACPI_FAN_WR_ACPI_FANS:
7205         case TPACPI_FAN_WR_TPEC:
7206                 /* never decrease fan level, scale is:
7207                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7208                  *
7209                  * We expect the firmware to set either 7 or AUTO, but we
7210                  * handle FULLSPEED out of paranoia.
7211                  *
7212                  * So, we can safely only restore FULLSPEED or 7, anything
7213                  * else could slow the fan.  Restoring AUTO is useless, at
7214                  * best that's exactly what the DSDT already set (it is the
7215                  * slower it uses).
7216                  *
7217                  * Always keep in mind that the DSDT *will* have set the
7218                  * fans to what the vendor supposes is the best level.  We
7219                  * muck with it only to speed the fan up.
7220                  */
7221                 if (fan_control_resume_level != 7 &&
7222                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7223                         return;
7224                 else
7225                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7226                                  (current_level != fan_control_resume_level);
7227                 break;
7228         default:
7229                 return;
7230         }
7231         if (do_set) {
7232                 printk(TPACPI_NOTICE
7233                         "restoring fan level to 0x%02x\n",
7234                         fan_control_resume_level);
7235                 rc = fan_set_level_safe(fan_control_resume_level);
7236                 if (rc < 0)
7237                         printk(TPACPI_NOTICE
7238                                 "failed to restore fan level: %d\n", rc);
7239         }
7240 }
7241
7242 static int fan_read(char *p)
7243 {
7244         int len = 0;
7245         int rc;
7246         u8 status;
7247         unsigned int speed = 0;
7248
7249         switch (fan_status_access_mode) {
7250         case TPACPI_FAN_RD_ACPI_GFAN:
7251                 /* 570, 600e/x, 770e, 770x */
7252                 rc = fan_get_status_safe(&status);
7253                 if (rc < 0)
7254                         return rc;
7255
7256                 len += sprintf(p + len, "status:\t\t%s\n"
7257                                "level:\t\t%d\n",
7258                                (status != 0) ? "enabled" : "disabled", status);
7259                 break;
7260
7261         case TPACPI_FAN_RD_TPEC:
7262                 /* all except 570, 600e/x, 770e, 770x */
7263                 rc = fan_get_status_safe(&status);
7264                 if (rc < 0)
7265                         return rc;
7266
7267                 len += sprintf(p + len, "status:\t\t%s\n",
7268                                (status != 0) ? "enabled" : "disabled");
7269
7270                 rc = fan_get_speed(&speed);
7271                 if (rc < 0)
7272                         return rc;
7273
7274                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7275
7276                 if (status & TP_EC_FAN_FULLSPEED)
7277                         /* Disengaged mode takes precedence */
7278                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7279                 else if (status & TP_EC_FAN_AUTO)
7280                         len += sprintf(p + len, "level:\t\tauto\n");
7281                 else
7282                         len += sprintf(p + len, "level:\t\t%d\n", status);
7283                 break;
7284
7285         case TPACPI_FAN_NONE:
7286         default:
7287                 len += sprintf(p + len, "status:\t\tnot supported\n");
7288         }
7289
7290         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7291                 len += sprintf(p + len, "commands:\tlevel <level>");
7292
7293                 switch (fan_control_access_mode) {
7294                 case TPACPI_FAN_WR_ACPI_SFAN:
7295                         len += sprintf(p + len, " (<level> is 0-7)\n");
7296                         break;
7297
7298                 default:
7299                         len += sprintf(p + len, " (<level> is 0-7, "
7300                                        "auto, disengaged, full-speed)\n");
7301                         break;
7302                 }
7303         }
7304
7305         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7306                 len += sprintf(p + len, "commands:\tenable, disable\n"
7307                                "commands:\twatchdog <timeout> (<timeout> "
7308                                "is 0 (off), 1-120 (seconds))\n");
7309
7310         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7311                 len += sprintf(p + len, "commands:\tspeed <speed>"
7312                                " (<speed> is 0-65535)\n");
7313
7314         return len;
7315 }
7316
7317 static int fan_write_cmd_level(const char *cmd, int *rc)
7318 {
7319         int level;
7320
7321         if (strlencmp(cmd, "level auto") == 0)
7322                 level = TP_EC_FAN_AUTO;
7323         else if ((strlencmp(cmd, "level disengaged") == 0) |
7324                         (strlencmp(cmd, "level full-speed") == 0))
7325                 level = TP_EC_FAN_FULLSPEED;
7326         else if (sscanf(cmd, "level %d", &level) != 1)
7327                 return 0;
7328
7329         *rc = fan_set_level_safe(level);
7330         if (*rc == -ENXIO)
7331                 printk(TPACPI_ERR "level command accepted for unsupported "
7332                        "access mode %d", fan_control_access_mode);
7333         else if (!*rc)
7334                 tpacpi_disclose_usertask("procfs fan",
7335                         "set level to %d\n", level);
7336
7337         return 1;
7338 }
7339
7340 static int fan_write_cmd_enable(const char *cmd, int *rc)
7341 {
7342         if (strlencmp(cmd, "enable") != 0)
7343                 return 0;
7344
7345         *rc = fan_set_enable();
7346         if (*rc == -ENXIO)
7347                 printk(TPACPI_ERR "enable command accepted for unsupported "
7348                        "access mode %d", fan_control_access_mode);
7349         else if (!*rc)
7350                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7351
7352         return 1;
7353 }
7354
7355 static int fan_write_cmd_disable(const char *cmd, int *rc)
7356 {
7357         if (strlencmp(cmd, "disable") != 0)
7358                 return 0;
7359
7360         *rc = fan_set_disable();
7361         if (*rc == -ENXIO)
7362                 printk(TPACPI_ERR "disable command accepted for unsupported "
7363                        "access mode %d", fan_control_access_mode);
7364         else if (!*rc)
7365                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7366
7367         return 1;
7368 }
7369
7370 static int fan_write_cmd_speed(const char *cmd, int *rc)
7371 {
7372         int speed;
7373
7374         /* TODO:
7375          * Support speed <low> <medium> <high> ? */
7376
7377         if (sscanf(cmd, "speed %d", &speed) != 1)
7378                 return 0;
7379
7380         *rc = fan_set_speed(speed);
7381         if (*rc == -ENXIO)
7382                 printk(TPACPI_ERR "speed command accepted for unsupported "
7383                        "access mode %d", fan_control_access_mode);
7384         else if (!*rc)
7385                 tpacpi_disclose_usertask("procfs fan",
7386                         "set speed to %d\n", speed);
7387
7388         return 1;
7389 }
7390
7391 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7392 {
7393         int interval;
7394
7395         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7396                 return 0;
7397
7398         if (interval < 0 || interval > 120)
7399                 *rc = -EINVAL;
7400         else {
7401                 fan_watchdog_maxinterval = interval;
7402                 tpacpi_disclose_usertask("procfs fan",
7403                         "set watchdog timer to %d\n",
7404                         interval);
7405         }
7406
7407         return 1;
7408 }
7409
7410 static int fan_write(char *buf)
7411 {
7412         char *cmd;
7413         int rc = 0;
7414
7415         while (!rc && (cmd = next_cmd(&buf))) {
7416                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7417                       fan_write_cmd_level(cmd, &rc)) &&
7418                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7419                       (fan_write_cmd_enable(cmd, &rc) ||
7420                        fan_write_cmd_disable(cmd, &rc) ||
7421                        fan_write_cmd_watchdog(cmd, &rc))) &&
7422                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7423                       fan_write_cmd_speed(cmd, &rc))
7424                     )
7425                         rc = -EINVAL;
7426                 else if (!rc)
7427                         fan_watchdog_reset();
7428         }
7429
7430         return rc;
7431 }
7432
7433 static struct ibm_struct fan_driver_data = {
7434         .name = "fan",
7435         .read = fan_read,
7436         .write = fan_write,
7437         .exit = fan_exit,
7438         .suspend = fan_suspend,
7439         .resume = fan_resume,
7440 };
7441
7442 /****************************************************************************
7443  ****************************************************************************
7444  *
7445  * Infrastructure
7446  *
7447  ****************************************************************************
7448  ****************************************************************************/
7449
7450 /* sysfs name ---------------------------------------------------------- */
7451 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7452                            struct device_attribute *attr,
7453                            char *buf)
7454 {
7455         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7456 }
7457
7458 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7459         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7460
7461 /* --------------------------------------------------------------------- */
7462
7463 /* /proc support */
7464 static struct proc_dir_entry *proc_dir;
7465
7466 /*
7467  * Module and infrastructure proble, init and exit handling
7468  */
7469
7470 static int force_load;
7471
7472 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7473 static const char * __init str_supported(int is_supported)
7474 {
7475         static char text_unsupported[] __initdata = "not supported";
7476
7477         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7478 }
7479 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7480
7481 static void ibm_exit(struct ibm_struct *ibm)
7482 {
7483         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7484
7485         list_del_init(&ibm->all_drivers);
7486
7487         if (ibm->flags.acpi_notify_installed) {
7488                 dbg_printk(TPACPI_DBG_EXIT,
7489                         "%s: acpi_remove_notify_handler\n", ibm->name);
7490                 BUG_ON(!ibm->acpi);
7491                 acpi_remove_notify_handler(*ibm->acpi->handle,
7492                                            ibm->acpi->type,
7493                                            dispatch_acpi_notify);
7494                 ibm->flags.acpi_notify_installed = 0;
7495                 ibm->flags.acpi_notify_installed = 0;
7496         }
7497
7498         if (ibm->flags.proc_created) {
7499                 dbg_printk(TPACPI_DBG_EXIT,
7500                         "%s: remove_proc_entry\n", ibm->name);
7501                 remove_proc_entry(ibm->name, proc_dir);
7502                 ibm->flags.proc_created = 0;
7503         }
7504
7505         if (ibm->flags.acpi_driver_registered) {
7506                 dbg_printk(TPACPI_DBG_EXIT,
7507                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7508                 BUG_ON(!ibm->acpi);
7509                 acpi_bus_unregister_driver(ibm->acpi->driver);
7510                 kfree(ibm->acpi->driver);
7511                 ibm->acpi->driver = NULL;
7512                 ibm->flags.acpi_driver_registered = 0;
7513         }
7514
7515         if (ibm->flags.init_called && ibm->exit) {
7516                 ibm->exit();
7517                 ibm->flags.init_called = 0;
7518         }
7519
7520         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7521 }
7522
7523 static int __init ibm_init(struct ibm_init_struct *iibm)
7524 {
7525         int ret;
7526         struct ibm_struct *ibm = iibm->data;
7527         struct proc_dir_entry *entry;
7528
7529         BUG_ON(ibm == NULL);
7530
7531         INIT_LIST_HEAD(&ibm->all_drivers);
7532
7533         if (ibm->flags.experimental && !experimental)
7534                 return 0;
7535
7536         dbg_printk(TPACPI_DBG_INIT,
7537                 "probing for %s\n", ibm->name);
7538
7539         if (iibm->init) {
7540                 ret = iibm->init(iibm);
7541                 if (ret > 0)
7542                         return 0;       /* probe failed */
7543                 if (ret)
7544                         return ret;
7545
7546                 ibm->flags.init_called = 1;
7547         }
7548
7549         if (ibm->acpi) {
7550                 if (ibm->acpi->hid) {
7551                         ret = register_tpacpi_subdriver(ibm);
7552                         if (ret)
7553                                 goto err_out;
7554                 }
7555
7556                 if (ibm->acpi->notify) {
7557                         ret = setup_acpi_notify(ibm);
7558                         if (ret == -ENODEV) {
7559                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7560                                         ibm->name);
7561                                 ret = 0;
7562                                 goto err_out;
7563                         }
7564                         if (ret < 0)
7565                                 goto err_out;
7566                 }
7567         }
7568
7569         dbg_printk(TPACPI_DBG_INIT,
7570                 "%s installed\n", ibm->name);
7571
7572         if (ibm->read) {
7573                 entry = create_proc_entry(ibm->name,
7574                                           S_IFREG | S_IRUGO | S_IWUSR,
7575                                           proc_dir);
7576                 if (!entry) {
7577                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7578                                ibm->name);
7579                         ret = -ENODEV;
7580                         goto err_out;
7581                 }
7582                 entry->data = ibm;
7583                 entry->read_proc = &dispatch_procfs_read;
7584                 if (ibm->write)
7585                         entry->write_proc = &dispatch_procfs_write;
7586                 ibm->flags.proc_created = 1;
7587         }
7588
7589         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7590
7591         return 0;
7592
7593 err_out:
7594         dbg_printk(TPACPI_DBG_INIT,
7595                 "%s: at error exit path with result %d\n",
7596                 ibm->name, ret);
7597
7598         ibm_exit(ibm);
7599         return (ret < 0)? ret : 0;
7600 }
7601
7602 /* Probing */
7603
7604 static bool __pure __init tpacpi_is_fw_digit(const char c)
7605 {
7606         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7607 }
7608
7609 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7610 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7611                                                 const char t)
7612 {
7613         return s && strlen(s) >= 8 &&
7614                 tpacpi_is_fw_digit(s[0]) &&
7615                 tpacpi_is_fw_digit(s[1]) &&
7616                 s[2] == t && s[3] == 'T' &&
7617                 tpacpi_is_fw_digit(s[4]) &&
7618                 tpacpi_is_fw_digit(s[5]) &&
7619                 s[6] == 'W' && s[7] == 'W';
7620 }
7621
7622 /* returns 0 - probe ok, or < 0 - probe error.
7623  * Probe ok doesn't mean thinkpad found.
7624  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7625 static int __must_check __init get_thinkpad_model_data(
7626                                                 struct thinkpad_id_data *tp)
7627 {
7628         const struct dmi_device *dev = NULL;
7629         char ec_fw_string[18];
7630         char const *s;
7631
7632         if (!tp)
7633                 return -EINVAL;
7634
7635         memset(tp, 0, sizeof(*tp));
7636
7637         if (dmi_name_in_vendors("IBM"))
7638                 tp->vendor = PCI_VENDOR_ID_IBM;
7639         else if (dmi_name_in_vendors("LENOVO"))
7640                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7641         else
7642                 return 0;
7643
7644         s = dmi_get_system_info(DMI_BIOS_VERSION);
7645         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7646         if (s && !tp->bios_version_str)
7647                 return -ENOMEM;
7648
7649         /* Really ancient ThinkPad 240X will fail this, which is fine */
7650         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7651                 return 0;
7652
7653         tp->bios_model = tp->bios_version_str[0]
7654                          | (tp->bios_version_str[1] << 8);
7655         tp->bios_release = (tp->bios_version_str[4] << 8)
7656                          | tp->bios_version_str[5];
7657
7658         /*
7659          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7660          * X32 or newer, all Z series;  Some models must have an
7661          * up-to-date BIOS or they will not be detected.
7662          *
7663          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7664          */
7665         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7666                 if (sscanf(dev->name,
7667                            "IBM ThinkPad Embedded Controller -[%17c",
7668                            ec_fw_string) == 1) {
7669                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7670                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7671
7672                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7673                         if (!tp->ec_version_str)
7674                                 return -ENOMEM;
7675
7676                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7677                                 tp->ec_model = ec_fw_string[0]
7678                                                 | (ec_fw_string[1] << 8);
7679                                 tp->ec_release = (ec_fw_string[4] << 8)
7680                                                 | ec_fw_string[5];
7681                         } else {
7682                                 printk(TPACPI_NOTICE
7683                                         "ThinkPad firmware release %s "
7684                                         "doesn't match the known patterns\n",
7685                                         ec_fw_string);
7686                                 printk(TPACPI_NOTICE
7687                                         "please report this to %s\n",
7688                                         TPACPI_MAIL);
7689                         }
7690                         break;
7691                 }
7692         }
7693
7694         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7695         if (s && !strnicmp(s, "ThinkPad", 8)) {
7696                 tp->model_str = kstrdup(s, GFP_KERNEL);
7697                 if (!tp->model_str)
7698                         return -ENOMEM;
7699         }
7700
7701         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7702         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7703         if (s && !tp->nummodel_str)
7704                 return -ENOMEM;
7705
7706         return 0;
7707 }
7708
7709 static int __init probe_for_thinkpad(void)
7710 {
7711         int is_thinkpad;
7712
7713         if (acpi_disabled)
7714                 return -ENODEV;
7715
7716         /*
7717          * Non-ancient models have better DMI tagging, but very old models
7718          * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
7719          */
7720         is_thinkpad = (thinkpad_id.model_str != NULL) ||
7721                       (thinkpad_id.ec_model != 0) ||
7722                       tpacpi_is_fw_known();
7723
7724         /* ec is required because many other handles are relative to it */
7725         TPACPI_ACPIHANDLE_INIT(ec);
7726         if (!ec_handle) {
7727                 if (is_thinkpad)
7728                         printk(TPACPI_ERR
7729                                 "Not yet supported ThinkPad detected!\n");
7730                 return -ENODEV;
7731         }
7732
7733         if (!is_thinkpad && !force_load)
7734                 return -ENODEV;
7735
7736         return 0;
7737 }
7738
7739
7740 /* Module init, exit, parameters */
7741
7742 static struct ibm_init_struct ibms_init[] __initdata = {
7743         {
7744                 .init = thinkpad_acpi_driver_init,
7745                 .data = &thinkpad_acpi_driver_data,
7746         },
7747         {
7748                 .init = hotkey_init,
7749                 .data = &hotkey_driver_data,
7750         },
7751         {
7752                 .init = bluetooth_init,
7753                 .data = &bluetooth_driver_data,
7754         },
7755         {
7756                 .init = wan_init,
7757                 .data = &wan_driver_data,
7758         },
7759         {
7760                 .init = uwb_init,
7761                 .data = &uwb_driver_data,
7762         },
7763 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7764         {
7765                 .init = video_init,
7766                 .data = &video_driver_data,
7767         },
7768 #endif
7769         {
7770                 .init = light_init,
7771                 .data = &light_driver_data,
7772         },
7773         {
7774                 .init = cmos_init,
7775                 .data = &cmos_driver_data,
7776         },
7777         {
7778                 .init = led_init,
7779                 .data = &led_driver_data,
7780         },
7781         {
7782                 .init = beep_init,
7783                 .data = &beep_driver_data,
7784         },
7785         {
7786                 .init = thermal_init,
7787                 .data = &thermal_driver_data,
7788         },
7789         {
7790                 .data = &ecdump_driver_data,
7791         },
7792         {
7793                 .init = brightness_init,
7794                 .data = &brightness_driver_data,
7795         },
7796         {
7797                 .data = &volume_driver_data,
7798         },
7799         {
7800                 .init = fan_init,
7801                 .data = &fan_driver_data,
7802         },
7803 };
7804
7805 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7806 {
7807         unsigned int i;
7808         struct ibm_struct *ibm;
7809
7810         if (!kp || !kp->name || !val)
7811                 return -EINVAL;
7812
7813         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7814                 ibm = ibms_init[i].data;
7815                 WARN_ON(ibm == NULL);
7816
7817                 if (!ibm || !ibm->name)
7818                         continue;
7819
7820                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7821                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7822                                 return -ENOSPC;
7823                         strcpy(ibms_init[i].param, val);
7824                         strcat(ibms_init[i].param, ",");
7825                         return 0;
7826                 }
7827         }
7828
7829         return -EINVAL;
7830 }
7831
7832 module_param(experimental, int, 0);
7833 MODULE_PARM_DESC(experimental,
7834                  "Enables experimental features when non-zero");
7835
7836 module_param_named(debug, dbg_level, uint, 0);
7837 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7838
7839 module_param(force_load, bool, 0);
7840 MODULE_PARM_DESC(force_load,
7841                  "Attempts to load the driver even on a "
7842                  "mis-identified ThinkPad when true");
7843
7844 module_param_named(fan_control, fan_control_allowed, bool, 0);
7845 MODULE_PARM_DESC(fan_control,
7846                  "Enables setting fan parameters features when true");
7847
7848 module_param_named(brightness_mode, brightness_mode, uint, 0);
7849 MODULE_PARM_DESC(brightness_mode,
7850                  "Selects brightness control strategy: "
7851                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7852
7853 module_param(brightness_enable, uint, 0);
7854 MODULE_PARM_DESC(brightness_enable,
7855                  "Enables backlight control when 1, disables when 0");
7856
7857 module_param(hotkey_report_mode, uint, 0);
7858 MODULE_PARM_DESC(hotkey_report_mode,
7859                  "used for backwards compatibility with userspace, "
7860                  "see documentation");
7861
7862 #define TPACPI_PARAM(feature) \
7863         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7864         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7865                          "at module load, see documentation")
7866
7867 TPACPI_PARAM(hotkey);
7868 TPACPI_PARAM(bluetooth);
7869 TPACPI_PARAM(video);
7870 TPACPI_PARAM(light);
7871 TPACPI_PARAM(cmos);
7872 TPACPI_PARAM(led);
7873 TPACPI_PARAM(beep);
7874 TPACPI_PARAM(ecdump);
7875 TPACPI_PARAM(brightness);
7876 TPACPI_PARAM(volume);
7877 TPACPI_PARAM(fan);
7878
7879 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7880 module_param(dbg_wlswemul, uint, 0);
7881 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7882 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7883 MODULE_PARM_DESC(wlsw_state,
7884                  "Initial state of the emulated WLSW switch");
7885
7886 module_param(dbg_bluetoothemul, uint, 0);
7887 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7888 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7889 MODULE_PARM_DESC(bluetooth_state,
7890                  "Initial state of the emulated bluetooth switch");
7891
7892 module_param(dbg_wwanemul, uint, 0);
7893 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7894 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7895 MODULE_PARM_DESC(wwan_state,
7896                  "Initial state of the emulated WWAN switch");
7897
7898 module_param(dbg_uwbemul, uint, 0);
7899 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7900 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7901 MODULE_PARM_DESC(uwb_state,
7902                  "Initial state of the emulated UWB switch");
7903 #endif
7904
7905 static void thinkpad_acpi_module_exit(void)
7906 {
7907         struct ibm_struct *ibm, *itmp;
7908
7909         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7910
7911         list_for_each_entry_safe_reverse(ibm, itmp,
7912                                          &tpacpi_all_drivers,
7913                                          all_drivers) {
7914                 ibm_exit(ibm);
7915         }
7916
7917         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7918
7919         if (tpacpi_inputdev) {
7920                 if (tp_features.input_device_registered)
7921                         input_unregister_device(tpacpi_inputdev);
7922                 else
7923                         input_free_device(tpacpi_inputdev);
7924         }
7925
7926         if (tpacpi_hwmon)
7927                 hwmon_device_unregister(tpacpi_hwmon);
7928
7929         if (tp_features.sensors_pdev_attrs_registered)
7930                 device_remove_file(&tpacpi_sensors_pdev->dev,
7931                                    &dev_attr_thinkpad_acpi_pdev_name);
7932         if (tpacpi_sensors_pdev)
7933                 platform_device_unregister(tpacpi_sensors_pdev);
7934         if (tpacpi_pdev)
7935                 platform_device_unregister(tpacpi_pdev);
7936
7937         if (tp_features.sensors_pdrv_attrs_registered)
7938                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7939         if (tp_features.platform_drv_attrs_registered)
7940                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7941
7942         if (tp_features.sensors_pdrv_registered)
7943                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7944
7945         if (tp_features.platform_drv_registered)
7946                 platform_driver_unregister(&tpacpi_pdriver);
7947
7948         if (proc_dir)
7949                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7950
7951         if (tpacpi_wq)
7952                 destroy_workqueue(tpacpi_wq);
7953
7954         kfree(thinkpad_id.bios_version_str);
7955         kfree(thinkpad_id.ec_version_str);
7956         kfree(thinkpad_id.model_str);
7957 }
7958
7959
7960 static int __init thinkpad_acpi_module_init(void)
7961 {
7962         int ret, i;
7963
7964         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7965
7966         /* Parameter checking */
7967         if (hotkey_report_mode > 2)
7968                 return -EINVAL;
7969
7970         /* Driver-level probe */
7971
7972         ret = get_thinkpad_model_data(&thinkpad_id);
7973         if (ret) {
7974                 printk(TPACPI_ERR
7975                         "unable to get DMI data: %d\n", ret);
7976                 thinkpad_acpi_module_exit();
7977                 return ret;
7978         }
7979         ret = probe_for_thinkpad();
7980         if (ret) {
7981                 thinkpad_acpi_module_exit();
7982                 return ret;
7983         }
7984
7985         /* Driver initialization */
7986
7987         TPACPI_ACPIHANDLE_INIT(ecrd);
7988         TPACPI_ACPIHANDLE_INIT(ecwr);
7989
7990         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7991         if (!tpacpi_wq) {
7992                 thinkpad_acpi_module_exit();
7993                 return -ENOMEM;
7994         }
7995
7996         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7997         if (!proc_dir) {
7998                 printk(TPACPI_ERR
7999                        "unable to create proc dir " TPACPI_PROC_DIR);
8000                 thinkpad_acpi_module_exit();
8001                 return -ENODEV;
8002         }
8003
8004         ret = platform_driver_register(&tpacpi_pdriver);
8005         if (ret) {
8006                 printk(TPACPI_ERR
8007                        "unable to register main platform driver\n");
8008                 thinkpad_acpi_module_exit();
8009                 return ret;
8010         }
8011         tp_features.platform_drv_registered = 1;
8012
8013         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
8014         if (ret) {
8015                 printk(TPACPI_ERR
8016                        "unable to register hwmon platform driver\n");
8017                 thinkpad_acpi_module_exit();
8018                 return ret;
8019         }
8020         tp_features.sensors_pdrv_registered = 1;
8021
8022         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
8023         if (!ret) {
8024                 tp_features.platform_drv_attrs_registered = 1;
8025                 ret = tpacpi_create_driver_attributes(
8026                                         &tpacpi_hwmon_pdriver.driver);
8027         }
8028         if (ret) {
8029                 printk(TPACPI_ERR
8030                        "unable to create sysfs driver attributes\n");
8031                 thinkpad_acpi_module_exit();
8032                 return ret;
8033         }
8034         tp_features.sensors_pdrv_attrs_registered = 1;
8035
8036
8037         /* Device initialization */
8038         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
8039                                                         NULL, 0);
8040         if (IS_ERR(tpacpi_pdev)) {
8041                 ret = PTR_ERR(tpacpi_pdev);
8042                 tpacpi_pdev = NULL;
8043                 printk(TPACPI_ERR "unable to register platform device\n");
8044                 thinkpad_acpi_module_exit();
8045                 return ret;
8046         }
8047         tpacpi_sensors_pdev = platform_device_register_simple(
8048                                                 TPACPI_HWMON_DRVR_NAME,
8049                                                 -1, NULL, 0);
8050         if (IS_ERR(tpacpi_sensors_pdev)) {
8051                 ret = PTR_ERR(tpacpi_sensors_pdev);
8052                 tpacpi_sensors_pdev = NULL;
8053                 printk(TPACPI_ERR
8054                        "unable to register hwmon platform device\n");
8055                 thinkpad_acpi_module_exit();
8056                 return ret;
8057         }
8058         ret = device_create_file(&tpacpi_sensors_pdev->dev,
8059                                  &dev_attr_thinkpad_acpi_pdev_name);
8060         if (ret) {
8061                 printk(TPACPI_ERR
8062                        "unable to create sysfs hwmon device attributes\n");
8063                 thinkpad_acpi_module_exit();
8064                 return ret;
8065         }
8066         tp_features.sensors_pdev_attrs_registered = 1;
8067         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
8068         if (IS_ERR(tpacpi_hwmon)) {
8069                 ret = PTR_ERR(tpacpi_hwmon);
8070                 tpacpi_hwmon = NULL;
8071                 printk(TPACPI_ERR "unable to register hwmon device\n");
8072                 thinkpad_acpi_module_exit();
8073                 return ret;
8074         }
8075         mutex_init(&tpacpi_inputdev_send_mutex);
8076         tpacpi_inputdev = input_allocate_device();
8077         if (!tpacpi_inputdev) {
8078                 printk(TPACPI_ERR "unable to allocate input device\n");
8079                 thinkpad_acpi_module_exit();
8080                 return -ENOMEM;
8081         } else {
8082                 /* Prepare input device, but don't register */
8083                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
8084                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
8085                 tpacpi_inputdev->id.bustype = BUS_HOST;
8086                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
8087                                                 thinkpad_id.vendor :
8088                                                 PCI_VENDOR_ID_IBM;
8089                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
8090                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
8091         }
8092         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
8093                 ret = ibm_init(&ibms_init[i]);
8094                 if (ret >= 0 && *ibms_init[i].param)
8095                         ret = ibms_init[i].data->write(ibms_init[i].param);
8096                 if (ret < 0) {
8097                         thinkpad_acpi_module_exit();
8098                         return ret;
8099                 }
8100         }
8101         ret = input_register_device(tpacpi_inputdev);
8102         if (ret < 0) {
8103                 printk(TPACPI_ERR "unable to register input device\n");
8104                 thinkpad_acpi_module_exit();
8105                 return ret;
8106         } else {
8107                 tp_features.input_device_registered = 1;
8108         }
8109
8110         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
8111         return 0;
8112 }
8113
8114 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
8115
8116 /*
8117  * This will autoload the driver in almost every ThinkPad
8118  * in widespread use.
8119  *
8120  * Only _VERY_ old models, like the 240, 240x and 570 lack
8121  * the HKEY event interface.
8122  */
8123 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8124
8125 /*
8126  * DMI matching for module autoloading
8127  *
8128  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8129  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8130  *
8131  * Only models listed in thinkwiki will be supported, so add yours
8132  * if it is not there yet.
8133  */
8134 #define IBM_BIOS_MODULE_ALIAS(__type) \
8135         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8136
8137 /* Ancient thinkpad BIOSes have to be identified by
8138  * BIOS type or model number, and there are far less
8139  * BIOS types than model numbers... */
8140 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8141
8142 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8143 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8144 MODULE_DESCRIPTION(TPACPI_DESC);
8145 MODULE_VERSION(TPACPI_VERSION);
8146 MODULE_LICENSE("GPL");
8147
8148 module_init(thinkpad_acpi_module_init);
8149 module_exit(thinkpad_acpi_module_exit);